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111-467: Evinrude produced two-stroke direct-injected engines ranging from 25 hp (19 kW) to a 3.4L V8 300 hp. They used carburetors until the late 1990s when EPA clean air regulations mandated new technologies. OMC partnered with FICHT of Germany to introduce direct injection. Extensive and thorough durability testing took place to assess the rigor and longevity of the design but the first design did not pass testing standards. Initial production of

222-415: A power-valve system . The valves are normally in or around the exhaust ports. They work in one of two ways; either they alter the exhaust port by closing off the top part of the port, which alters port timing, such as Rotax R.A.V.E, Yamaha YPVS, Honda RC-Valve, Kawasaki K.I.P.S., Cagiva C.T.S., or Suzuki AETC systems, or by altering the volume of the exhaust, which changes the resonant frequency of

333-421: A rotary valve is that it enables the two-stroke engine's intake timing to be asymmetrical, which is not possible with piston-port type engines. The piston-port type engine's intake timing opens and closes before and after top dead center at the same crank angle, making it symmetrical, whereas the rotary valve allows the opening to begin and close earlier. Rotary valve engines can be tailored to deliver power over

444-421: A DKW design that proved reasonably successful employing loop charging. The original SAAB 92 had a two-cylinder engine of comparatively low efficiency. At cruising speed, reflected-wave, exhaust-port blocking occurred at too low a frequency. Using the asymmetrical three-port exhaust manifold employed in the identical DKW engine improved fuel economy. The 750-cc standard engine produced 36 to 42 hp, depending on

555-502: A city as high numbers of immigrants, mainly German , made their way to Wisconsin during the 1840s and 1850s. Scholars classify German immigration to the United States in three major waves, and Wisconsin received a significant number of immigrants from all three. The first wave from 1845 to 1855 consisted mainly of people from Southwestern Germany , the second wave from 1865 to 1873 concerned primarily Northwestern Germany , while

666-448: A crossflow engine) is always best and support is good. In some engines, the small end is offset to reduce thrust in the intended rotational direction and the forward face of the piston has been made thinner and lighter to compensate, but when running backward, this weaker forward face suffers increased mechanical stress it was not designed to resist. This can be avoided by the use of crossheads and also using thrust bearings to isolate

777-567: A factor of 50 to 100 times. In addition, Evinrude E-TEC emits 30 to 40 percent less total particulate matter on a weight basis than a similar “ultra-low emissions” four-stroke outboard. Furthermore, oxides of nitrogen and hydrocarbon emissions for Evinrude E-TEC are similar, if not lower, than a four-stroke outboard. There are no oil changes with this engine, as well as no belts, and no valve or throttle linkage adjustments. This makes Evinrude E-TEC engines easier to own than comparable four-stroke engines. In addition, numerous advancements combine to create

888-630: A higher power-to-weight ratio than a four-stroke engine, since their power stroke occurs twice as often. Two-stroke engines can also have fewer moving parts , and thus be cheaper to manufacture and weigh less. In countries and regions with stringent emissions regulation, two-stroke engines have been phased out in automotive and motorcycle uses. In regions where regulations are less stringent, small displacement two-stroke engines remain popular in mopeds and motorcycles. They are also used in power tools such as chainsaws and leaf blowers . The first commercial two-stroke engine involving cylinder compression

999-464: A large Serbian population, who have developed Serbian restaurants, a Serbian K–8 School , and Serbian churches, along with an American Serb Hall. The American Serb Hall in Milwaukee is known for its Friday fish fries and popular events. Many U.S. presidents have visited Milwaukee's Serb Hall in the past. The Bosnian population is growing in Milwaukee as well due to late-20th-century immigration after

1110-623: A large music festival. Milwaukee is home to the Fortune 500 companies of Northwestern Mutual , Fiserv , WEC Energy Group , Rockwell Automation , and Harley-Davidson . It is also home to several colleges, including Marquette University , the Medical College of Wisconsin , Milwaukee School of Engineering , and University of Wisconsin–Milwaukee . The city is represented in two of the four major professional sports leagues —the Bucks of

1221-588: A lasting influence on the American school system. Kindergarten was created as a pre-school for children, and sports programs of all levels, as well as music and art, were incorporated as elements of the regular school curriculum. These ideas were first introduced by radical-democratic German groups, such as the Turner Societies, known today as the American Turners . Specifically in Milwaukee,

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1332-695: A line by Alice Cooper in the 1992 comedy film Wayne's World . The name of the future city was spelled in many ways prior to 1844. People living west of the Milwaukee River preferred the modern-day spelling, while those east of the river often called it Milwaukie . Other spellings included Melleokii (1679), Millioki (1679), Meleki (1684), Milwarik (1699), Milwacky (1761), Milwakie (1779), Millewackie (1817), Milwahkie (1820), and Milwalky (1821). The Milwaukee Sentinel used Milwaukie in its headline until it switched to Milwaukee on November 30, 1844. Indigenous cultures lived along

1443-540: A master pattern maker, as well. Along with a growing number of people at the turn of the century, Ole Evinrude was fascinated by the potential of the newly developed internal combustion engine, and he set up a firm to build small engines. The idea for Ole Evinrude 's invention, a detachable internal-combustion engine mounted on outboard brackets or on the stern of a boat, first took root in the early 1900s. A pattern maker by trade, Ole Evinrude built his first outboard motor in 1907. To this day, outboard motors employ basically

1554-470: A patent in 1880 in Germany. The first truly practical two-stroke engine is attributed to Yorkshireman Alfred Angas Scott , who started producing twin-cylinder water-cooled motorcycles in 1908. Two-stroke gasoline engines with electrical spark ignition are particularly useful in lightweight or portable applications such as chainsaws and motorcycles. However, when weight and size are not an issue,

1665-550: A result of early-20th-century redlining . Its history was heavily influenced by German immigrants in the 19th century, and it continues to be a center for German-American culture, specifically becoming well known for its brewing industry . In recent years, Milwaukee has undergone several development projects. Major additions to the city since the turn of the 21st century include the Wisconsin Center , American Family Field , The Hop streetcar system , an expansion to

1776-449: A scavenging function. The units run in pairs, with the lower half of one piston charging an adjacent combustion chamber. The upper section of the piston still relies on total-loss lubrication, but the other engine parts are sump lubricated with cleanliness and reliability benefits. The mass of the piston is only about 20% more than a loop-scavenged engine's piston because skirt thicknesses can be less. Many modern two-stroke engines employ

1887-658: A similar system. Traditional flywheel magnetos (using contact-breaker points, but no external coil) worked equally well in reverse because the cam controlling the points is symmetrical, breaking contact before top dead center equally well whether running forward or backward. Reed-valve engines run backward just as well as piston-controlled porting, though rotary valve engines have asymmetrical inlet timing and do not run very well. Serious disadvantages exist for running many engines backward under load for any length of time, and some of these reasons are general, applying equally to both two-stroke and four-stroke engines. This disadvantage

1998-518: A turbocharger. Crankcase-compression two-stroke engines, such as common small gasoline-powered engines, are lubricated by a petroil mixture in a total-loss system . Oil is mixed in with their petrol fuel beforehand, in a fuel-to-oil ratio of around 32:1. This oil then forms emissions, either by being burned in the engine or as droplets in the exhaust, historically resulting in more exhaust emissions, particularly hydrocarbons, than four-stroke engines of comparable power output. The combined opening time of

2109-442: A variety of occupations: grocers, blacksmiths, tavernkeepers, coopers, butchers, broommakers, shoemakers, draymen, laborers, and farmers. Three distinct Polish communities evolved in Milwaukee, with the majority settling in the area south of Greenfield Avenue. Milwaukee County's Polish population of 30,000 in 1890 rose to 100,000 by 1915. Poles historically have had a strong national cultural and social identity, often maintained through

2220-535: A weight basis than a similar “ultra-low emissions” four-stroke outboard. Furthermore, oxides of nitrogen and hydrocarbon emissions for Evinrude E-TEC are similar to, if not lower than, a four-stroke outboard. Evinrude's name continued not only on many an outboard motor but also by the presentation of the Ole Evinrude Award . Given annually between 1955 and 1986 by the New York Boat Show , it

2331-400: A wider speed range or higher power over a narrower speed range than either a piston-port or reed-valve engine. Where a portion of the rotary valve is a portion of the crankcase itself, of particular importance, no wear should be allowed to take place. In a cross-flow engine, the transfer and exhaust ports are on opposite sides of the cylinder, and a deflector on the top of the piston directs

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2442-413: Is accepted in most cases where cost, weight, and size are major considerations. The problem comes about because in "forward" running, the major thrust face of the piston is on the back face of the cylinder, which in a two-stroke particularly, is the coolest and best-lubricated part. The forward face of the piston in a trunk engine is less well-suited to be the major thrust face, since it covers and uncovers

2553-597: Is along the Menomonee River (east of Hawley Road) and Fairview Avenue/Golfview Parkway (west of Hawley Road), with the east–west numbering line defined along 1st Street (north of Oklahoma Avenue) and Chase/Howell Avenue (south of Oklahoma Avenue). This numbering system is also used to the north by Mequon in Ozaukee County , and by some Waukesha County communities. Milwaukee is crossed by Interstate 43 and Interstate 94 , which come together downtown at

2664-422: Is attributed to Scottish engineer Dugald Clerk , who patented his design in 1881. However, unlike most later two-stroke engines, his had a separate charging cylinder. The crankcase -scavenged engine, employing the area below the piston as a charging pump, is generally credited to Englishman Joseph Day . On 31 December 1879, German inventor Karl Benz produced a two-stroke gas engine, for which he received

2775-534: Is being phased out. Honda , for instance, ceased selling two-stroke off-road motorcycles in the United States in 2007, after abandoning road-going models considerably earlier. Due to their high power-to-weight ratio and ability to be used in any orientation, two-stroke engines are common in handheld outdoor power tools including leaf blowers , chainsaws , and string trimmers . Two-stroke diesel engines are found mostly in large industrial and marine applications, as well as some trucks and heavy machinery. Although

2886-574: Is common in on-road, off-road, and stationary two-stroke engines ( Detroit Diesel ), certain small marine two-stroke engines ( Gray Marine Motor Company , which adapted the Detroit Diesel Series 71 for marine use ), certain railroad two-stroke diesel locomotives ( Electro-Motive Diesel ) and large marine two-stroke main propulsion engines ( Wärtsilä ). Ported types are represented by the opposed piston design in which two pistons are in each cylinder, working in opposite directions such as

2997-637: Is offered for children in grades K–5 . Although the German presence in Milwaukee after the Civil War remained strong and their largest wave of immigrants had yet to land, other groups also made their way to the city. Foremost among these were Polish immigrants. The Poles had many reasons for leaving their homeland, mainly poverty and political oppression. Because Milwaukee offered the Polish immigrants an abundance of low-paying entry-level jobs, it became one of

3108-432: Is that the two-stroke's crankcase is sealed and forms part of the induction process in gasoline and hot-bulb engines . Diesel two-strokes often add a Roots blower or piston pump for scavenging . The reed valve is a simple but highly effective form of check valve commonly fitted in the intake tract of the piston-controlled port. It allows asymmetric intake of the fuel charge, improving power and economy, while widening

3219-409: Is under every circumstance more efficient than cross-flow scavenging. In a uniflow engine, the mixture, or "charge air" in the case of a diesel, enters at one end of the cylinder controlled by the piston and the exhaust exits at the other end controlled by an exhaust valve or piston. The scavenging gas-flow is, therefore, in one direction only, hence the name uniflow. The design using exhaust valve(s)

3330-531: The 2020 census , Milwaukee is the 31st-most populous city in the United States and the fifth-most populous city in the Midwest . It is the central city of the Milwaukee metropolitan area , the 40th-most populous metro area in the U.S. with 1.57 million residents. Milwaukee is an ethnically and culturally diverse city. However, it continues to be one of the most racially segregated cities, largely as

3441-701: The Battle of Fort Dearborn on August 15, 1812, the only known armed conflict in Chicago. This battle convinced the American government to remove these groups of Native Americans from their indigenous land. After being attacked in the Black Hawk War in 1832, the Native Americans in Milwaukee signed the 1833 Treaty of Chicago with the United States. In exchange for ceding their lands in the area, they were to receive monetary payments and lands west of

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3552-467: The Catholic Church . A view of Milwaukee's South Side skyline is replete with the steeples of the many churches these immigrants built that are still vital centers of the community. St. Stanislaus Catholic Church and the surrounding neighborhood was the center of Polish life in Milwaukee. As the Polish community surrounding St. Stanislaus continued to grow, Mitchell Street became known as

3663-457: The East Side , and more recently Walker's Point and Bay View , along with attracting new businesses to its downtown area. These efforts have substantially slowed the population decline and have stabilized many parts of Milwaukee. Milwaukee's European history is evident today. Largely through its efforts to preserve its history, Milwaukee was named one of the "Dozen Distinctive Destinations" by

3774-464: The Junkers Jumo 205 and Napier Deltic . The once-popular split-single design falls into this class, being effectively a folded uniflow. With advanced-angle exhaust timing, uniflow engines can be supercharged with a crankshaft-driven blower, either piston or Roots-type. The piston of this engine is "top-hat"-shaped; the upper section forms the regular cylinder, and the lower section performs

3885-652: The Marquette Interchange . The Interstate 894 bypass (which as of May 2015 also contains Interstate 41 ) runs through portions of the city's southwest side, and Interstate 794 comes out of the Marquette interchange eastbound, bends south along the lakefront and crosses the harbor over the Hoan Bridge , then ends near the Bay View neighborhood and becomes the "Lake Parkway" ( WIS-794 ). One of

3996-561: The Milwaukee . Smaller rivers, such as the Root River and Lincoln Creek, also flow through the city. Milwaukee's terrain is sculpted by the glacier path and includes steep bluffs along Lake Michigan that begin about a mile (1.6 km) north of downtown. In addition, 30 miles (48 km) southwest of Milwaukee is the Kettle Moraine and lake country that provides an industrial landscape combined with inland lakes. According to

4107-752: The Milwaukee Art Museum , Milwaukee Repertory Theater , the Bradley Symphony Center , and Discovery World , as well as major renovations to the UW–Milwaukee Panther Arena . Fiserv Forum opened in late 2018, and hosts sporting events and concerts. Milwaukee is categorized as a "Gamma minus" city by the Globalization and World Cities Research Network , with a regional GDP of over $ 102 billion in 2020. Since 1968, Milwaukee has been home to Summerfest ,

4218-598: The NBA and the Brewers of MLB . The etymological origin of the name Milwaukee is disputed. Wisconsin academic Virgil J. Vogel has said, "the name [...] Milwaukee is not difficult to explain, yet there are a number of conflicting claims made concerning it. One theory says it comes from the Anishinaabemowin/Ojibwe word mino-akking , meaning "good land", or words in closely related languages that mean

4329-652: The National Trust for Historic Preservation in 2006. Historic Milwaukee walking tours provide a guided tour of Milwaukee's historic districts, including topics on Milwaukee's architectural heritage, its glass skywalk system, and the Milwaukee Riverwalk . Milwaukee lies along the shores and bluffs of Lake Michigan at the confluence of three rivers: the Menomonee , the Kinnickinnic , and

4440-811: The Outboard Marine Corporation ) and the Lockwood Motor Company , with Evinrude the president of this new company. Bessie, who had retired in 1928 for health reasons, died in 1933 in Milwaukee . Ole Evinrude died the following year on July 12 in Milwaukee , and the company was taken over by their son, Ralph . In 1936 the Evinrude company merged with the Johnson Motor Company to form the Outboard Marine Corporation. During World War II

4551-690: The United States Census Bureau , the city has a total area of 96.80 square miles (250.71 km ), of which, 96.12 square miles (248.95 km ) is land and 0.68 square miles (1.76 km ) is water. The city is overwhelmingly (99.89% of its area) in Milwaukee County , but there are two tiny unpopulated portions that extend into neighboring counties. North–south streets are numbered, and east–west streets are named. However, north–south streets east of 1st Street are named, like east–west streets. The north–south numbering line

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4662-512: The expansion chamber , such as the Suzuki SAEC and Honda V-TACS system. The result is an engine with better low-speed power without sacrificing high-speed power. However, as power valves are in the hot gas flow, they need regular maintenance to perform well. Direct injection has considerable advantages in two-stroke engines. In carburetted two-strokes, a major problem is a portion of the fuel/air mixture going directly out, unburned, through

4773-479: The oil reservoir does not depend on gravity. A number of mainstream automobile manufacturers have used two-stroke engines in the past, including the Swedish Saab , German manufacturers DKW , Auto-Union , VEB Sachsenring Automobilwerke Zwickau , VEB Automobilwerk Eisenach , and VEB Fahrzeug- und Jagdwaffenwerk , and Polish manufacturers FSO and FSM . The Japanese manufacturers Suzuki and Subaru did

4884-439: The piston (one up and one down movement) in one revolution of the crankshaft. (A four-stroke engine requires four strokes of the piston to complete a power cycle, in two crankshaft revolutions.) In a two-stroke engine, the end of the combustion stroke and the beginning of the compression stroke happen simultaneously, with the intake and exhaust (or scavenging ) functions occurring at the same time. Two-stroke engines often have

4995-537: The " Forty-Eighters ", immigrated to the U.S. to avoid imprisonment and persecution by German authorities. One of the most famous "liberal revolutionaries" of 1848 was Carl Schurz . He later explained in 1854 why he came to Milwaukee, "It is true, similar things [cultural events and societies] were done in other cities where the Forty-eighters [ sic ] had congregated. But so far as I know, nowhere did their influence so quickly impress itself upon

5106-655: The "Polish Grand Avenue". As Mitchell Street grew more dense, the Polish population started moving south to the Lincoln Village neighborhood , home to the Basilica of St. Josaphat and Kosciuszko Park . Other Polish communities started on the East Side of Milwaukee . Jones Island was a major commercial fishing center settled mostly by Kashubians and other Poles from around the Baltic Sea . Milwaukee has

5217-400: The 1930s the city was severely segregated via "redlining". In 1960, African-American residents made up 15 percent of the Milwaukee's population, yet the city was still among the most segregated of that time. As of 2019, at least three out of four black residents in Milwaukee would have to move in order to create "racially integrated" neighborhoods. By 1960, Milwaukee had grown to become one of

5328-463: The 1950s, the Hispanic community was beginning to emerge. They arrived for jobs, filling positions in the manufacturing and agricultural sectors. During this time there were labor shortages due to the immigration laws that had reduced immigration from Eastern and Southern Europe. Additionally, strikes contributed to the labor shortages. In the mid-20th century, African-Americans from Chicago moved to

5439-528: The 1960s due in no small way to the increased power afforded by loop scavenging. An additional benefit of loop scavenging was the piston could be made nearly flat or slightly domed, which allowed the piston to be appreciably lighter and stronger, and consequently to tolerate higher engine speeds. The "flat top" piston also has better thermal properties and is less prone to uneven heating, expansion, piston seizures, dimensional changes, and compression losses. SAAB built 750- and 850-cc three-cylinder engines based on

5550-407: The 1960s, especially for motorcycles, but for smaller or slower engines using direct injection, the deflector piston can still be an acceptable approach. This method of scavenging uses carefully shaped and positioned transfer ports to direct the flow of fresh mixture toward the combustion chamber as it enters the cylinder. The fuel/air mixture strikes the cylinder head , then follows the curvature of

5661-681: The American Turners established its own Normal College for teachers of physical education and the German-English Academy . Milwaukee's German element is still strongly present today. The city celebrates its German culture by annually hosting a German Fest in July and an Oktoberfest in October. Milwaukee boasts a number of German restaurants, as well as a traditional German beer hall. A German language immersion school

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5772-524: The City of Milwaukee began in 1835, following removal of the tribes in the Council of Three Fires. Early that year it became known that Juneau and Kilbourn intended to lay out competing town-sites. By the year's end both had purchased their lands from the government and made their first sales. There were perhaps 100 new settlers in this year, mostly from New England and other Eastern states. On September 17, 1835,

5883-639: The Evinrude E-TEC quiet signature sound including an exclusive idle air bypass circuit." All modern Evinrude motors were built and assembled in Sturtevant, Wisconsin , south of Milwaukee . Ole Evinrude was born in Gjøvik , Norway on April 19, 1877; five years later, his family emigrated to the United States, settling near Cambridge, Wisconsin . Interested in mechanics from an early age, Evinrude became an apprentice machinist at age 16 and eventually

5994-526: The Evinrude brand and would exit the outboard boat motor market, in favor of manufacturing recreational boats. BRP also announced a partnership with what it termed "market leader" Mercury Marine to supply power packages to their craft. According to BRP's press release announcing the Evinrude discontinuation, “'Our outboard engines business has been greatly impacted by COVID-19, obliging us to discontinue production of our outboard motors immediately. This business segment had already been facing some challenges and

6105-399: The German inventor of an early form in the mid-1920s, it became widely adopted in Germany country during the 1930s and spread further afield after World War II . Loop scavenging is the most common type of fuel/air mixture transfer used on modern two-stroke engines. Suzuki was one of the first manufacturers outside of Europe to adopt loop-scavenged, two-stroke engines. This operational feature

6216-561: The German lands between 1835 and 1910, 90 percent went to the United States, most of them traveling to the Mid-Atlantic states and the Midwest. By 1900, 34 percent of Milwaukee's population was of German background. The largest number of German immigrants to Milwaukee came from Prussia , followed by Bavaria , Saxony , Hanover , and Hesse-Darmstadt . Milwaukee gained its reputation as the most German of American cities not just from

6327-594: The Mississippi in Indian Territory . Europeans arrived in the Milwaukee area before the 1833 Treaty of Chicago. French missionaries and traders first passed through the area in the late 17th and 18th centuries. Alexis Laframboise, coming from Michilimackinac (now in Michigan), settled a trading post in 1785 and is considered the first resident of European descent in the Milwaukee region. One story on

6438-752: The Native Americans around Milwaukee were some of the few groups to ally with the rebel Continentals. After the American Revolutionary War , the Native Americans fought the United States in the Northwest Indian War as part of the Council of Three Fires . During the War of 1812 , they held a council in Milwaukee in June 1812, which resulted in their decision to attack Chicago in retaliation against American expansion. This resulted in

6549-586: The North side of Milwaukee. Milwaukee's East Side has attracted a population of Russians and other Eastern Europeans who began migrating in the 1990s, after the end of the Cold War . Many Hispanics of mostly Puerto Rican and Mexican heritage live on the south side of Milwaukee. During the first sixty years of the 20th century, Milwaukee was the major city in which the Socialist Party of America earned

6660-513: The area which only showed Kilbourntown, implying Juneautown did not exist or the river's east side was uninhabited and thus undesirable. The third prominent developer was George H. Walker. He claimed land to the south of the Milwaukee River, along with Juneautown, where he built a log house in 1834. This area grew and became known as Walker's Point. The first large wave of settlement to the areas that would later become Milwaukee County and

6771-423: The bore diameter for reasonable piston ring life. Beyond this, the piston rings bulge into the exhaust port and wear quickly. A maximum 70% of bore width is possible in racing engines, where rings are changed every few races. Intake duration is between 120 and 160°. Transfer port time is set at a minimum of 26°. The strong, low-pressure pulse of a racing two-stroke expansion chamber can drop the pressure to -7 psi when

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6882-605: The city's total population of 373,857. Milwaukee has a strong Greek Orthodox Community, many of whom attend the Annunciation Greek Orthodox Church on Milwaukee's northwest side, designed by Wisconsin-born architect Frank Lloyd Wright . Milwaukee has a sizable Croatian population, with Croatian churches and their own historic and successful soccer club The Croatian Eagles at the 30-acre Croatian Park in Franklin, Wisconsin. Milwaukee also has

6993-504: The city, but in Milwaukee County, they number at 38,286. The largest Italian-American festival in the area, Festa Italiana , is held in the city, while Irishfest is the largest Irish-American festival in southeast Wisconsin. By 1910, Milwaukee shared the distinction with New York City of having the largest percentage of foreign-born residents in the United States. In 1910, European descendants ("Whites") represented 99.7% of

7104-459: The combustion chamber, and then is deflected downward. This not only prevents the fuel/air mixture from traveling directly out the exhaust port, but also creates a swirling turbulence which improves combustion efficiency , power, and economy. Usually, a piston deflector is not required, so this approach has a distinct advantage over the cross-flow scheme (above). Often referred to as "Schnuerle" (or "Schnürle") loop scavenging after Adolf Schnürle,

7215-913: The company manufactured motors for various types of military marine craft. In the 1930s and 1940s, 4-60 engines were used in midgets racers. These 59.4 cu in (973 cc) Four 4 cylinder, water-cooled horizontally opposed engines ran on special racing fuel: 82% methanol , 10% toluene or benzol , and 8% castor oil (which was available in 5 US gal (19 L; 4.2 imp gal) cans from drug stores ), plus tetraethyllead (also available in drug stores) to avoid engine knock . They would rev close to 8,000 rpm and could produce 80 hp (60 kW), close to 1 horsepower per pound (0.6 kW/kg) of engine weight. OMC declared chapter 11 bankruptcy in 2000 and its assets were subsequently acquired by Bombardier Recreational Products, which continued to build Evinrude branded outboard motors. On May 27, 2020, BRP announced that they would be retiring

7326-453: The crankshaft commonly spins in the same axis and direction as do the wheels i.e. "forward". Some of the considerations discussed here apply to four-stroke engines (which cannot reverse their direction of rotation without considerable modification), almost all of which spin forward, too. It is also useful to note that the "front" and "back" faces of the piston are - respectively - the exhaust port and intake port sides of it, and are not to do with

7437-415: The cycle's potential for high thermodynamic efficiency makes it ideal for diesel compression ignition engines operating in large, weight-insensitive applications, such as marine propulsion , railway locomotives , and electricity generation . In a two-stroke engine, the exhaust gases transfer less heat to the cooling system than a four-stroke, which means more energy to drive the piston, and if present,

7548-403: The distinctive traits of Milwaukee's residential areas are the neighborhoods full of so-called Polish flats . These are two- family homes with separate entrances, but with the units stacked one on top of another instead of side-by-side. This arrangement enables a family of limited means to purchase both a home and a modestly priced rental apartment unit. Since Polish-American immigrants to

7659-479: The early 20th century, West Allis (1902), and West Milwaukee (1906) were added, which completed the first generation of "inner-ring" suburbs. In the 1920s, Chicago gangster activity came north to Milwaukee during the Prohibition era . Al Capone , noted Chicago mobster, owned a home in the Milwaukee suburb Brookfield , where moonshine was made. The house still stands on a street named after Capone. In

7770-400: The engine from end loads. Large two-stroke ship diesels are sometimes made to be reversible. Like four-stroke ship engines (some of which are also reversible), they use mechanically operated valves, so require additional camshaft mechanisms. These engines use crossheads to eliminate sidethrust on the piston and isolate the under-piston space from the crankcase. On top of other considerations,

7881-415: The exhaust port in the cylinder, the hottest part of the engine, where piston lubrication is at its most marginal. The front face of the piston is also more vulnerable since the exhaust port, the largest in the engine, is in the front wall of the cylinder. Piston skirts and rings risk being extruded into this port, so having them pressing hardest on the opposite wall (where there are only the transfer ports in

7992-409: The exhaust port, and direct injection effectively eliminates this problem. Two systems are in use: low-pressure air-assisted injection and high-pressure injection. Since the fuel does not pass through the crankcase, a separate source of lubrication is needed. For the purpose of this discussion, it is convenient to think in motorcycle terms, where the exhaust pipe faces into the cooling air stream, and

8103-592: The fifth-largest Polish population in the U.S. at 45,467, ranking behind New York City (211,203), Chicago (165,784), Los Angeles (60,316) and Philadelphia (52,648). The city holds Polish Fest , an annual celebration of Polish culture and cuisine . In addition to the Germans and Poles, Milwaukee received a large influx of other European immigrants from Lithuania , Italy , Ireland , France , Russia , Bohemia , and Sweden , who included Jews , Lutherans , and Catholics . Italian Americans total 16,992 in

8214-425: The first design started prior to another round of EPA regulations. At the beginning, the company tried retrofitting the previous design in order to bring the motors up to the new standards. These modifications were not carefully engineered or designed and caused significant engine failures, most notably the powerhead failure. This eventually resulted in a recall of that generation of motors. The losses on these motors,

8325-608: The first election was held in Milwaukee; the number of votes cast was 39. By 1840, the three towns had grown, along with their rivalries. There were intense battles between the towns, mainly Juneautown and Kilbourntown, which culminated with the Milwaukee Bridge War of 1845. Following the Bridge War, on January 31, 1846, the towns were combined to incorporate as the City of Milwaukee, and elected Solomon Juneau as Milwaukee's first mayor. Milwaukee began to grow as

8436-413: The fresh intake charge into the upper part of the cylinder, pushing the residual exhaust gas down the other side of the deflector and out the exhaust port. The deflector increases the piston's weight and exposed surface area, and the fact that it makes piston cooling and achieving an effective combustion chamber shape more difficult is why this design has been largely superseded by uniflow scavenging after

8547-684: The highest votes. Milwaukee elected three mayors who ran on the ticket of the Socialist Party: Emil Seidel (1910–1912), Daniel Hoan (1916–1940), and Frank Zeidler (1948–1960). Often referred to as " Sewer Socialists ", the Milwaukee Socialists were characterized by their practical approach to government and labor. In 1892, Whitefish Bay , South Milwaukee , and Wauwatosa were incorporated. They were followed by Cudahy (1895), North Milwaukee (1897) and East Milwaukee, later known as Shorewood , in 1900. In

8658-743: The impact from the current context has forced our hand,' said José Boisjoli, President and CEO of BRP. 'We will concentrate our efforts on new and innovative technologies and on the development of our boat companies, where we continue to see a lot of potential to transform the on-water experience for consumers,' he added.” BRP claimed it "will continue to supply customers and our dealer network service parts and will honour our manufacturer limited warranties, plus offer select programs to manage inventory." A statement it followed with an extended disclaimer on "Forward Looking Statements" disavowing any obligation to comply with what it said. The discontinuation occurred in spite of modern Evinrude E-TEC engines being among

8769-443: The intake and exhaust ports in some two-stroke designs can also allow some amount of unburned fuel vapors to exit in the exhaust stream. The high combustion temperatures of small, air-cooled engines may also produce NO x emissions. Two-stroke gasoline engines are preferred when mechanical simplicity, light weight, and high power-to-weight ratio are design priorities. By mixing oil with fuel, they can operate in any orientation as

8880-500: The large number of German immigrants it received, but for the sense of community which the immigrants established here. Most German immigrants came to Wisconsin in search of inexpensive farmland. However, immigration began to change in character and size in the late 1840s and early 1850s, due to the 1848 revolutionary movements in Europe . After 1848, hopes for a united Germany had failed, and revolutionary and radical Germans, known as

8991-563: The largest Polish settlements in the USA . For many residents, Milwaukee's South Side is synonymous with the Polish community that developed here. The group maintained a high profile here for decades, and it was not until the 1950s and 1960s that families began to disperse to the southern suburbs. By 1850, there were seventy-five Poles in Milwaukee County and the US Census shows they had

9102-474: The largest cities in the United States. Its population peaked at 741,324. In 1960, the Census Bureau reported city's population as 91.1% white and 8.4% black. By the late 1960s, Milwaukee's population had started to decline as people moved to suburbs, aided by ease of highways and offering the advantages of less crime, new housing, and lower taxation. Milwaukee had a population of 594,833 by 2010, while

9213-497: The loss of reputation and the surge of competition from Japan and Mercury pushed the company into bankruptcy in 2000. In 2001, Bombardier acquired the Evinrude and Johnson Outboards brands; the FICHT technology was re-engineered into E-TEC direct injection. This improved fuel efficiency and reduced emissions, oil consumption, noise levels and maintenance needs. This is due in part to a pinpoint oiling system that only applies oil to

9324-407: The lowest emission and highest power-to-weight ratio outboards produced, in large " due to a technological choice not understood by boaters", according to a yachting trade magazine, and reflected in the contrast between the superior environmental performance of the Evinrude E-TEC engine versus four-stroke engine alternatives, incorrectly perceived as more environmentally friendly. The Evinrude E-TEC

9435-475: The model year. The Monte Carlo Rally variant, 750-cc (with a filled crankshaft for higher base compression), generated 65 hp. An 850-cc version was available in the 1966 SAAB Sport (a standard trim model in comparison to the deluxe trim of the Monte Carlo). Base compression comprises a portion of the overall compression ratio of a two-stroke engine. Work published at SAE in 2012 points that loop scavenging

9546-695: The necessary components, unlike the original two-stroke motors. Evinrude E-TEC was the first outboard engine technology to win the US Environmental Protection Agency 's 2004 Clean Air Excellence Award which recognizes low emission levels . According to the EPA, it is also recognized as acceptable for use by the European Union. "Compared to a similar 2004 four-stroke engine, carbon monoxide emissions with Evinrude E-TEC are typically 30 to 50 percent lower; and at idle are lower by

9657-479: The oar as a means of boat propulsion. Cary and Evinrude were married in 1906. In 1907, Evinrude founded Evinrude Motors in Milwaukee . The firm immediately began to develop its first outboard motor, a one-cylinder, 1.5 hp (1.1 kW) model, which became an instant success upon its introduction in 1909. Because of Bessie's poor health, the Evinrudes sold their company in 1913, and Ole agreed to not re-enter

9768-399: The oil pump of a modern two-stroke may not work in reverse, in which case the engine suffers oil starvation within a short time. Running a motorcycle engine backward is relatively easy to initiate, and in rare cases, can be triggered by a back-fire. It is not advisable. Model airplane engines with reed valves can be mounted in either tractor or pusher configuration without needing to change

9879-581: The origin of Milwaukee's name says, [O]ne day during the thirties of the last century [1800s] a newspaper calmly changed the name to Milwaukee, and Milwaukee it has remained until this day. The spelling "Milwaukie" lives on in Milwaukie , Oregon , named after the Wisconsin city in 1847, before the current spelling was universally accepted. Milwaukee has three " founding fathers ": Solomon Juneau , Byron Kilbourn , and George H. Walker . Solomon Juneau

9990-487: The other - the inlet pipe having passage to the crankcase only when the two cutouts coincide. The crankshaft itself may form one of the members, as in most glow-plug model engines. In another version, the crank disc is arranged to be a close-clearance fit in the crankcase, and is provided with a cutout that lines up with an inlet passage in the crankcase wall at the appropriate time, as in Vespa motor scooters. The advantage of

10101-420: The outboard boat engine revolves around a picnic that Cary and Evinrude enjoyed on Okauchee Lake , in the lake country west of Milwaukee , two and one-half miles from shore. Cary expressed a desire for a dish of ice cream and Evinrude rowed back to shore for it. Of course, the ice cream was melted by the time he returned, but Evinrude, inspired by the incident, was determined to design an engine that would replace

10212-608: The outboard motor business for five years. His inventive mind kept busy, however, and during his "retirement", he devised a much-improved, two-cylinder outboard engine. In 1921 he and Bessie formed the ELTO Outboard Motor Company (ELTO standing for Evinrude's Light Twin Outboard). This new outboard engine was also very successful, and in 1929 the ELTO company merged with the original Evinrude company (since renamed

10323-434: The piston covering and uncovering the ports as it moves up and down in the cylinder. In the 1970s, Yamaha worked out some basic principles for this system. They found that, in general, widening an exhaust port increases the power by the same amount as raising the port, but the power band does not narrow as it does when the port is raised. However, a mechanical limit exists to the width of a single exhaust port, at about 62% of

10434-440: The piston is at bottom dead center, and the transfer ports nearly wide open. One of the reasons for high fuel consumption in two-strokes is that some of the incoming pressurized fuel-air mixture is forced across the top of the piston, where it has a cooling action, and straight out the exhaust pipe. An expansion chamber with a strong reverse pulse stops this outgoing flow. A fundamental difference from typical four-stroke engines

10545-484: The population of the overall metropolitan area increased. Given its large immigrant population and historic neighborhoods, Milwaukee avoided the severe declines of some of its fellow " Rust Belt " cities. Since the 1980s, the city has begun to make strides in improving its economy, neighborhoods, and image, resulting in the revitalization of neighborhoods such as the Historic Third Ward , Lincoln Village ,

10656-550: The power band. Such valves are widely used in motorcycle, ATV, and marine outboard engines. The intake pathway is opened and closed by a rotating member. A familiar type sometimes seen on small motorcycles is a slotted disk attached to the crankshaft , which covers and uncovers an opening in the end of the crankcase, allowing charge to enter during one portion of the cycle (called a disc valve). Another form of rotary inlet valve used on two-stroke engines employs two cylindrical members with suitable cutouts arranged to rotate one within

10767-466: The principles remain the same, the mechanical details of various two-stroke engines differ depending on the type. The design types vary according to the method of introducing the charge to the cylinder, the method of scavenging the cylinder (exchanging burnt exhaust for fresh mixture) and the method of exhausting the cylinder. Piston port is the simplest of the designs and the most common in small two-stroke engines. All functions are controlled solely by

10878-469: The propeller. These motors are compression ignition, so no ignition timing issues and little difference between running forward and running backward are seen. Milwaukee, Wisconsin Milwaukee ( / m ɪ l ˈ w ɔː k i / mil- WAW -kee ) is the most populous city in the U.S. state of Wisconsin and the county seat of Milwaukee County . With a population of 577,222 at

10989-821: The same in the 1970s. Production of two-stroke cars ended in the 1980s in the West, due to increasingly stringent regulation of air pollution . Eastern Bloc countries continued until around 1991, with the Trabant and Wartburg in East Germany. Two-stroke engines are still found in a variety of small propulsion applications, such as outboard motors , small on- and off-road motorcycles , mopeds , motor scooters , motorized bicycles , tuk-tuks , snowmobiles , go-karts , RC cars , ultralight and model airplanes. Particularly in developed countries, pollution regulations have meant that their use for many of these applications

11100-409: The same technology: a vertical crankshaft, horizontal flywheels, and set of bevel gears, but modern motors propel boats faster than the 1907 version (150 mph versus 5 mph). While Evinrude concentrated on the mechanical and engineering aspects of the new firm, he entrusted the bookkeeping and business end of the firm to his assistant, Bessie Cary . The story surrounding Evinrude's invention of

11211-481: The same. These included Menominee and Potawatomi. Another theory is that it stems from the Meskwaki or Algonquian languages, whose term for "gathering place" is mahn-a-waukee . The city of Milwaukee itself claims that the name is derived from mahn-ah-wauk , a Potawatomi word for "council grounds". Some sources have claimed that Milwaukee stems from an Algonquian word meaning "the good land", popularized by

11322-627: The second half of the 18th century, the Native Americans living near Milwaukee played a role in all the major European wars on the American continent. During the French and Indian War , a group of "Ojibwas and Pottawattamies from the far [Lake] Michigan" (i.e., the area from Milwaukee to Green Bay) joined the French-Canadian Daniel Liénard de Beaujeu at the Battle of the Monongahela . In the American Revolutionary War ,

11433-404: The third wave from 1880 to 1893 came from Northeastern Germany . In the 1840s, the number of people who left German-speaking lands was 385,434, in the 1850s it reached 976,072, and an all-time high of 1.4 million immigrated in the 1880s. In 1890, the 2.78 million first-generation German Americans represented the second-largest foreign-born group in the United States. Of all those who left

11544-520: The top or bottom of the piston. Regular gasoline two-stroke engines can run backward for short periods and under light load with little problem, and this has been used to provide a reversing facility in microcars , such as the Messerschmitt KR200 , that lacked reverse gearing. Where the vehicle has electric starting, the motor is turned off and restarted backward by turning the key in the opposite direction. Two-stroke golf carts have used

11655-701: The war in Bosnia-Herzegovina . During this time, a small community of African Americans migrated from the South in the Great Migration . They settled near each other, forming a community that came to be known as Bronzeville . As industry boomed, more migrants came, and African-American influence grew in Milwaukee. By 1925, around 9,000 Mexicans lived in Milwaukee, but the Great Depression forced many of them to move back south. In

11766-524: The waterways for thousands of years. The first recorded inhabitants of the Milwaukee area were various Native American tribes: the Menominee , Fox , Mascouten , Sauk , Potawatomi , and Ojibwe (all Algic/Algonquian peoples), and the Ho-Chunk (Winnebago, a Siouan people). Many of these people had lived around Green Bay before migrating to the Milwaukee area about the time of European contact. In

11877-520: The whole social atmosphere as in 'German Athens of America' as Milwaukee was called at the time." Schurz was referring to the various clubs and societies Germans developed in Milwaukee. The pattern of German immigrants settling near each other encouraged the continuation of the German lifestyle and customs. This resulted in German language organizations that encompassed all aspects of life; for example, singing societies and gymnastics clubs. Germans also had

11988-415: Was presented in recognition of an individual's contributions to the growth of recreational boating. It also gained worldwide popular fame when the name of a character in the animated feature film , The Rescuers echoed that of the company. Two-stroke engine A two-stroke (or two-stroke cycle ) engine is a type of internal combustion engine that completes a power cycle with two strokes of

12099-464: Was the first of the three to come to the area, in 1818. He founded a town called Juneau's Side, or Juneautown, that began attracting more settlers. In competition with Juneau, Byron Kilbourn established Kilbourntown west of the Milwaukee River . He ensured the roads running toward the river did not join with those on the east side. This accounts for the large number of angled bridges that still exist in Milwaukee today. Further, Kilbourn distributed maps of

12210-475: Was the first outboard engine technology to win the US Environmental Protection Agency 's Clean Air Excellence Award, which recognizes low emission levels . According to the EPA, when compared to a similar four-stroke engine at the time of the award, carbon monoxide emissions with Evinrude E-TEC were typically 30 to 50 percent lower; and at idle are lower by a factor of 50 to 100 times. In addition, Evinrude E-TEC emit 30 to 40 percent less total particulate matter on

12321-541: Was used in conjunction with the expansion chamber exhaust developed by German motorcycle manufacturer, MZ, and Walter Kaaden. Loop scavenging, disc valves, and expansion chambers worked in a highly coordinated way to significantly increase the power output of two-stroke engines, particularly from the Japanese manufacturers Suzuki, Yamaha, and Kawasaki. Suzuki and Yamaha enjoyed success in Grand Prix motorcycle racing in

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