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75-492: Displacing 4.6 L; 278.6 cu in (4,565 cc) in its basic form, the direct family line transitioned to longitudinal and 4.4 L; 266.7 cu in (4,371 cc) supercharged versions. Variants were used at Oldsmobile (as the Aurora L47 V8 and "Shortstar" LX5 V6 ), as well as in several top-end 2000s Pontiacs and Buicks . The related Northstar System was Cadillac's trademarked name for

150-405: A hot-bulb engine used a 'jerk pump' to dispense fuel oil at high pressure to an injector. Another development in early diesel engines was the pre-combustion chamber, which was invented in 1919 by Prosper l'Orange to avoid the drawbacks of air-blast injection systems. The pre-combustion chamber made it feasible to produce engines in size suitable for automobiles and MAN Truck & Bus presented

225-632: A spark plug . The Cummins Model H diesel truck engine was introduced in America in 1933. In 1936, the Mercedes-Benz OM 138 diesel engine (using a precombustion chamber) became one of the first fuel-injected engines used in a mass-production passenger car. During World War II , several petrol engines for aircraft used direct-injection systems, such as the European Junkers Jumo 210 , Daimler-Benz DB 601 , BMW 801 , and

300-632: A Northstar-equipped car to be driven with no coolant for about 100 mi (161 km) without damage. Another unusual feature of some heavily electronic-laden Northstar-equipped cars such as the Seville , DeVille , and Eldorado is a liquid-cooled alternator. Although this was intended to prolong alternator life, GM reverted to a traditional air-cooled setup for 2001 to eliminate potential leak points and extraneous tubing. Later developments included direct coil-on-plug ignition, roller lifters, and variable valve timing , which can vary intake by up to 40° and

375-454: A carburettor. Many of the carburettor's supporting components—such as the air filter, intake manifold, and fuel line routing—could be used with few or no changes. This postponed the redesign and tooling costs of these components. Single-point injection was used extensively on American-made passenger cars and light trucks during 1980–1995, and in some European cars in the early and mid-1990s. In the US,

450-581: A central injector instead of multiple injectors. Single-point injection (also called 'throttle-body injection') uses one injector in a throttle body mounted similarly to a carburettor on an intake manifold . As in a carburetted induction system, the fuel is mixed with the air before entering the intake manifold. Single-point injection was a relatively low-cost way for automakers to reduce exhaust emissions to comply with tightening regulations while providing better "driveability" (easy starting, smooth running, no engine stuttering) than could be obtained with

525-413: A chain or belt drive a transverse engine is usually used, and with shaft drives a longitudinal engine. Longitudinal engines in motorcycles do have one disadvantage: the "tipping point" of the crankshaft tilts along the entire motorcycle to a greater or lesser degree when accelerating. This is partly resolved by having other components, such as the generator and the gearbox, rotate in the opposite direction to

600-675: A forged crankshaft for the 2006 model year. Cadillac had planned to introduce a V12 Northstar this decade, likely for use in the Escalade , but economics and new CAFE standards killed the idea. Most Northstar engines produce 275 to 300 hp (205 to 224 kW), with power reaching as high as 469 hp (350 kW) in the supercharged LC3 . The engines were revised for 2000 with coil-on-plug ignition and roller follower valvegear for improved fuel economy and reduced emissions. Though power output did not change, this update made premium fuel merely recommended, rather than required. All but

675-572: A fuel injection system are described in the following sections. In some systems, a single component performs multiple functions. Fuel injection is operated by spraying pressurised fuel into the engine. Therefore a device to pressurise the fuel is needed, such as a fuel pump. The system must determine the appropriate amount of fuel to be supplied and control the fuel flow to supply this amount. Several early mechanical injection systems used relatively sophisticated helix-controlled injection pump(s) that both metered fuel and created injection pressure. Since

750-728: A fuel injection system in 1941 and by 1956 it was used in the Jaguar racing cars. At the 1957 24 Hours of Le Mans , the 1st to 4th placed cars were Jaguar D-Type entries using a Lucas fuel injection system. Also in 1957, General Motors introduced the Rochester Ramjet option, consisting of a fuel injection system for the V8 engine in the Chevrolet Corvette. During the 1960s, fuel injection systems were also produced by Hilborn , SPICA and Kugelfischer . Up until this time,

825-419: A greater angle. In the late 1960s, GM divisions Oldsmobile and Cadillac had front-wheel drive models Toronado and Eldorado respectively, with a longitudinal V8 engine and an integrated automatic transmission and differential unit powering the front wheels. Honda and Toyota also offered front-wheel drive cars with longitudinal engines, namely Honda Vigor , Acura/Honda Legend/RL , and Toyota Tercel . This

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900-587: A package of performance features introduced in mid-1992 that coupled the 4T80E transmission, a 100,000 mile service interval, road sensing suspension, variable power steering, and 4-wheel disc brakes to the Division's high-output and high-torque Northstar engines. GM ceased production of the Northstar in 2011. The final cars to receive it, the Cadillac DTS , Buick Lucerne , and Cadillac STS , rolled off

975-580: A passenger car was released the following year, in the Mercedes-Benz 300SL sports car. However the engine suffered lubrication problems due to petrol diluting the engine oil, and subsequent Mercedes-Benz engines switched to a manifold injection design. Likewise, most petrol injection systems prior to the 2000s used the less-expensive manifold injection design. Throughout the 1950s, several manufacturers introduced their manifold injection systems for petrol engines. Lucas Industries had begun developing

1050-483: A pulsed flow system which used an air flow meter to calculate the amount of fuel required. L-Jetronic was widely adopted on European cars during the 1970s and 1980s. As a system that uses electronically-controlled fuel injectors which open and close to control the amount of fuel entering the engine, the L-Jetronic system uses the same basic principles as modern electronic fuel injection (EFI) systems. Prior to 1979,

1125-399: A sophisticated common-rail injection system. The latter is the most common system in modern automotive engines. During the 20th century, most petrol engines used either a carburettor or indirect fuel injection. Use of direct injection in petrol engines has become increasingly common in the 21st century. In a common rail system, fuel from the fuel tank is supplied to a common header (called

1200-668: A tuned intake system. Most LD8 Northstars are rated at 275 hp (205 kW) and 300 lb⋅ft (407 N⋅m). The 4.6 L; 278.6 cu in (4,565 cc) Northstar was designed originally for transverse front-wheel drive applications. It was modified substantially in 2004 for longitudinal rear- and all-wheel drive use in the STS , SRX , and XLR , as well as receiving continuously variable valve timing on both intake and exhaust sides. The RWD ( LH2 ) Northstar produces 320 hp (239 kW) and 315 lb⋅ft (427 N⋅m). The addition of variable valve timing enables most of

1275-480: Is 89.5 mm × 92 mm (3.52 in × 3.62 in). It was also one of GM's first engines to use coil-on-plug ignition. Compression ratio is 9.3:1. The cost of building this engine was high, and it was not used in many vehicles. It was said at the time that a family of premium V6s would follow, with displacements ranging from 3.3 L to 3.7 L, but only the LX5 was ever produced before GM discontinued

1350-488: Is a transverse V8 for front-wheel drive cars. Introduced in 1994, it is designed to provide more torque than the high-revving L37 . The LD8 code had been used on all torque-tuned transverse Northstars, even as the exact engine specifications evolved. Compression ratio is 10.3:1 for engines built prior to model year 2000, and 10.0:1 for those built afterwards. The 1998 revision is quieter than previous Northstar engines, due to hydraulic engine mounts, and performs better due to

1425-630: Is a list of typical examples of types of engines which can be placed in motor vehicles: Sequential fuel injection Fuel injection is the introduction of fuel in an internal combustion engine , most commonly automotive engines , by the means of a fuel injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All compression-ignition engines (e.g. diesel engines ), and many spark-ignition engines (i.e. petrol (gasoline) engines , such as Otto or Wankel ), use fuel injection of one kind or another. Mass-produced diesel engines for passenger cars (such as

1500-413: Is always intermittent (either sequential or cylinder-individual). This can be done either with a blast of air or hydraulically, with the latter method being more common in automotive engines. Typically, hydraulic direct injection systems spray fuel into the air inside the cylinder or combustion chamber. Direct injection can be achieved with a conventional helix-controlled injection pump, unit injectors, or

1575-546: Is called a manifold injection system. There exist two types of manifold injection systems: multi-point injection (or port injection) and single-point injection (or throttle body injection). Internal mixture formation systems can be separated into several different varieties of direct and indirect injection, the most common being the common-rail injection system, a variety of direct injection. The term "electronic fuel injection" refers to any fuel injection system controlled by an engine control unit . The fundamental functions of

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1650-533: Is injected at the same time to all the cylinders; or cylinder-individual , in which the engine control unit can adjust the injection for each cylinder individually. Multi-point injection (also called 'port injection') injects fuel into the intake ports just upstream of each cylinder's intake valve , rather than at a central point within an intake manifold. Typically, multi-point injected systems use multiple fuel injectors, but some systems, such as GM's central port injection system, use tubes with poppet valves fed by

1725-474: Is usually used for rear-wheel drive cars, except for some Audi , SAAB , the Oldsmobile Toronado , and the 1967 Cadillac Eldorado equipped with longitudinal engines in front wheel drive. In front-wheel drive cars a transverse engine is usually used. Trucks often have longitudinal engines with rear-wheel drive. For motorcycles, the use of a particular type depends on the drive: in the case of

1800-415: The Mercedes-Benz OM 138 ) became available in the late 1930s and early 1940s, being the first fuel-injected engines for passenger car use. In passenger car petrol engines, fuel injection was introduced in the early 1950s and gradually gained prevalence until it had largely replaced carburetors by the early 1990s. The primary difference between carburetion and fuel injection is that fuel injection atomizes

1875-610: The Shortstar . Although it has a 90° V-angle like the Northstar, the engine block was engineered from scratch, so bore centers are different. It has chain-driven dual overhead cams and four valves per cylinder, but is an even-firing design with a split-pin crankshaft similar to the Buick 3800 engine . The LX5 displaced 3.5 L; 211.9 cu in (3,473 cc) and produced 215 hp (160 kW) at 5,600 rpm and 234 lb⋅ft (317 N⋅m) at 4,400 rpm. Bore and stroke

1950-564: The Shvetsov ASh-82FN (M-82FN) . The German direct-injection systems were based on diesel injection systems used by Bosch, Deckel, Junkers and l'Orange. By around 1943, the Rolls-Royce Merlin and Wright R-3350 had switched from traditional carburettors to fuel-injection (called "pressure carburettors" at the time), however these engines used throttle body manifold injection , rather than the direct-injection systems of

2025-479: The Wankel engine . In a manifold injection system, air and fuel are mixed outside the combustion chamber so that a mixture of air and fuel is sucked into the engine. The main types of manifold injections systems are multi-point injection and single-point injection . These systems use either a continuous injection or an intermittent injection design. In a continuous injection system, fuel flows at all times from

2100-669: The accumulator ), and then sent through tubing to the injectors, which inject it into the combustion chamber. The accumulator has a high-pressure relief valve to maintain pressure and return the excess fuel to the fuel tank. The fuel is sprayed with the help of a nozzle that is opened and closed with a solenoid-operated needle valve . Third-generation common rail diesels use piezoelectric injectors for increased precision, with fuel pressures up to 300  MPa or 44,000  psi . The types of common-rail systems include air-guided injection and spray-guided injection . Used by diesel engines, these systems include: This injection method

2175-407: The crankshaft without conventional main bearing caps. An oil manifold plate with an integrated silicone gasket forms the oil gallery under this. A typical oil change used 7.5–8 US qt (7.1–7.6 L; 6.2–6.7 imp qt) of oil. GM specified cast-iron cylinder liners and the cast aluminum pistons included valve clearance. Northstar is an interference engine : the valves will strike

2250-437: The throttle body . Fuel injectors which also control the metering are called "injection valves", while injectors that perform all three functions are called unit injectors . Direct injection means that the fuel is injected into the main combustion chamber of each cylinder. The air and fuel are mixed only inside the combustion chamber. Therefore, only air is sucked into the engine during the intake stroke. The injection scheme

2325-557: The 1950 Goliath GP700 small saloon, it was also added to the Gutbrod Superior engine in 1952. This mechanically-controlled system was essentially a specially lubricated high-pressure diesel direct-injection pump of the type that is governed by the vacuum behind an intake throttle valve. A Bosch mechanical direct-injection system was also used in the straight-eight used in the 1954 Mercedes-Benz W196 Formula One racing car. The first four-stroke direct-injection petrol engine for

Northstar engine series - Misplaced Pages Continue

2400-428: The 1954-1959 Mercedes-Benz 300 SL - all used manifold injection (i.e. the injectors located at the intake ports or throttle body, instead of inside the combustion chamber). This began to change when the first mass-produced petrol direct injection system for passenger cars was a common rail system introduced in the 1997 Mitsubishi 6G74 V6 engine. The first common-rail system for a passenger car diesel engine

2475-452: The 1980s, electronic systems have been used to control the metering of fuel. More recent systems use an electronic engine control unit which meters the fuel, controls the ignition timing and controls various other engine functions. The fuel injector is effectively a spray nozzle that performs the final stage in the delivery of fuel into the engine. The injector is located in the combustion chamber , inlet manifold or - less commonly -

2550-516: The Aurora V8, production stopped with the demise of Oldsmobile. The 3.5L LX5 was on the Ward's 10 Best Engines list for 1999 and 2000. Longitudinal engine In automotive engineering , a longitudinal engine is an internal combustion engine in which the crankshaft is oriented along the long axis of the vehicle , from front to back. See also: transverse engine This type of motor

2625-612: The Division's dealers were clamoring for. This group of features became known as the Northstar System . Central to it was a high-tech V8 with the performance and sophistication to compete with an ever-expanding list of imported challengers. Capable of producing 300 hp (224 kW) out of its 4.6 L; 278.6 cu in (4,565 cc) displacement, the Northstar featured a cast aluminum 90° V8 block with 4 in (101.6 mm) bore spacing split into unitary upper and lower halves. The lower crankcase assembly supported

2700-589: The Electrojector system, becoming the first cars known to use an electronic fuel injection (EFI) system. The Electrojector patents were subsequently sold to Bosch, who developed the Electrojector into the Bosch D-Jetronic . The D-Jetronic was produced from 1967-1976 and first used on the VW 1600TL/E . The system was a speed/density system, using engine speed and intake manifold air density to calculate

2775-500: The G10 engine in the 2000 Chevrolet Metro became the last engine available on an American-sold vehicle to use throttle body injection. In indirect-injected diesel engines (as well as Akroyd engines), there are two combustion chambers: the main combustion chamber, and a pre-chamber (also called an ante-chamber) that is connected to the main one. The fuel is injected only into the pre-chamber (where it begins to combust), and not directly into

2850-621: The German engines. From 1940, the Mitsubishi Kinsei 60 series engine used a direct-injection system, along with the related Mitsubishi Kasei engine from 1941. In 1943, a low-pressure fuel injection system was added to the Nakajima Homare Model 23 radial engine. The first mass-produced petrol direct-injection system was developed by Bosch and initially used in small automotive two-stroke petrol engines. Introduced in

2925-554: The Northstar engine included the 4.6L 320 hp (239 kW) and 315 lb⋅ft (427 N⋅m) LH2 which began in 2004, and supercharged 4.4L {{cvt|469|hp|kW|0} LC3 created for the STS-V which are detailed below. The 4.6 L; 278.6 cu in (4,565 cc) L37 ( VIN "9") was the original Northstar. It is tuned for responsiveness and power, while the later LD8 is designed for more sedate use. The L37 code had been used on all high-output transverse Northstars, even as

3000-459: The Northstar's design at Oldsmobile R&D some time in 1984 in anticipation of the advanced dual overhead cam V8 engines to be introduced by European and Japanese competitors later in the decade. At that time, Cadillac was using the aluminum HT Overhead Valve (OHV) V8 which GM pushed hastily into production because the CAFE standards for 1982 would preempt using 1981's V8-6-4 . At the time it

3075-655: The Shortstar in favor of their current flagship V6, the High Feature engine , in 2004. The LX5 was entirely different from any other V6 in the GM inventory - the only other DOHC V6 engines ever offered by GM included the Chevrolet Twin Dual Cam produced from 1991-1997, which was made by modifying the traditional Chevy 60-degree OHV block V6 for the dual overhead cams rather than building a DOHC engine from

Northstar engine series - Misplaced Pages Continue

3150-576: The XLR-V engine produces 443 hp (330 kW) at 6400 rpm and 414 lb⋅ft (561 N⋅m) at 3900 rpm. The L47 Aurora engine was a special V8 designed for the Oldsmobile Aurora , based on the Northstar engine, used during the 1995-1999 and 2001-2003 model years. It is a DOHC 4.0 L; 243.8 cu in (3,995 cc) V8 which produced 250 hp (186 kW) and 260 lb⋅ft (353 N⋅m) of torque. The bore and stroke

3225-589: The amount of fuel to be injected. In 1974, Bosch introduced the K-Jetronic system, which used a continuous flow of fuel from the injectors (rather than the pulsed flow of the D-Jetronic system). K-Jetronic was a mechanical injection system, using a plunger actuated by the intake manifold pressure which then controlled the fuel flow to the injectors. Also in 1974, Bosch introduced the L-Jetronic system,

3300-483: The crankshaft. Most larger, "premium" vehicles use the longitudinal engine orientation in combination with rear wheel drive , because powerful engines such as the inline-6 and 90° big-bore V8 are usually too long to fit in a FF transverse engine bay. By contrast most mainstream modern vehicles use front wheel drive along with a transverse engine arrangement since they are usually equipped with inline-4 or V6 engines. While both layouts can be adapted for all-wheel drive ,

3375-579: The diesel engine, but also improved it. He increased the air blast pressure from 4–5 kp/cm (390–490 kPa) to 65 kp/cm (6,400 kPa). In the meantime, the first manifold injection system was designed by Johannes Spiel in 1884, while working at Hallesche Maschinenfabrik in Germany. In 1891, the British Herbert-Akroyd oil engine became the first engine to use a pressurised fuel injection system. This design, called

3450-411: The electronics in fuel injection systems used analogue electronics for the control system. The Bosch Motronic multi-point fuel injection system (also amongst the first systems where the ignition system is controlled by the same device as the fuel injection system) was the first mass-produced system to use digital electronics . The Ford EEC-III single-point fuel injection system, introduced in 1980,

3525-430: The engine would eventually cause these bolts to weaken and loosen in their threads, rupturing the seal and in turn blowing the head gasket. The Northstar System was Cadillac 's trademarked name for a package of automobile performance features introduced in mid-1992 on the 1993 Cadillac Allanté and later on the 1993 Seville and Eldorado . The Northstar System included the following components: Later versions of

3600-455: The exact engine specifications evolved. The compression ratio for the L37 is 10.3:1 for engines built prior to 2000, and 10.0:1 afterwards. The original L37 was specified at 290 hp (216 kW), but 1993 production examples were rated at 295 hp (220 kW). The engine topped out at 300 hp (224 kW) from 1996 through 2004 on the STS , DTS and ETC models, making these some of

3675-483: The exhaust by up to 50°. VVT was devised for the longitudinal LH2 version, and was not used on the transverse front wheel drive engines due to packaging considerations. The engine was introduced in mid-1992 in the 1993 Cadillac Allanté ; in 1996 the Northstar became the standard engine on all Cadillacs except the Fleetwood, but is now phased out of all Cadillac models. The 275 hp (205 kW) Northstar engine

3750-483: The exhaust valves are canted to 7° with center-mounted platinum-tipped spark plugs. The cam covers are magnesium for light weight and sound damping. Sequential fuel injection was delivered via eight thermoplastic tubes. Ignition was distributorless , with a waste spark setup. The powertrain control module (PCM) controlled spark and fuel injection timing as well as the shift points for the new four-speed, transverse GM 4T80 transmission . All engines of this family share

3825-441: The first direct-injected diesel engine for trucks in 1924. Higher pressure diesel injection pumps were introduced by Bosch in 1927. In 1898, German company Deutz AG started producing four-stroke petrol stationary engines with manifold injection. The 1906 Antoinette 8V aircraft engine (the world's first V8 engine) was another early four-stroke engine that used manifold injection. The first petrol engine with direct-injection

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3900-655: The fuel injection systems had used a mechanical control system. In 1957, the American Bendix Electrojector system was introduced, which used analogue electronics for the control system. The Electrojector was intended to be available for the Rambler Rebel mid-size car, however reliability problems meant that the fuel injection option was not offered. In 1958, the Chrysler 300D , DeSoto Adventurer , Dodge D-500 and Plymouth Fury offered

3975-580: The fuel injectors, but at a variable flow rate. The most common automotive continuous injection system is the Bosch K-Jetronic system, introduced in 1974 and used until the mid-1990s by various car manufacturers. Intermittent injection systems can be sequential , in which injection is timed to coincide with each cylinder's intake stroke; batched , in which fuel is injected to the cylinders in groups, without precise synchronization to any particular cylinder's intake stroke; simultaneous , in which fuel

4050-633: The fuel through a small nozzle under high pressure, while carburetion relies on suction created by intake air accelerated through a Venturi tube to draw fuel into the airstream. The term "fuel injection" is vague and comprises various distinct systems with fundamentally different functional principles. Typically, the only thing all fuel injection systems have in common is a lack of carburetion . There are two main functional principles of mixture formation systems for internal combustion engines: internal mixture formation and external mixture formation. A fuel injection system that uses external mixture formation

4125-602: The ground up, and the Cadillac/Holden HFV6 available from 2004 to the present day. These three designs are completely unrelated and leave two gaps in 1998 and 2003 where no DOHC V6 was available from GM (except for the 54 degree Opel V6 used most notably in the first generation Cadillac CTS at launch as well as the Saturn L Series and Catera). This contrasts starkly with competitors practices of evolving engineering over multiple, continuously improving designs. As with

4200-488: The increase in power from the L37 and LD8 Northstars. A 4.4 L; 266.7 cu in (4,371 cc) supercharged Northstar was used in the 2006 Cadillac STS-V and Cadillac XLR-V . The bore was reduced for increased strength and improved head gasket sealing. Variable valve timing is used on both the intake and exhaust sides. The STS-V engine produces 469 hp (350 kW) at 6400 rpm and 439 lb⋅ft (595 N⋅m) at 3900 rpm with 9.0:1 compression and

4275-591: The line in 2011. It was replaced by the GM LS small-block OHV engine , used in newer Cadillac V8 models like the CTS-V , marking a step back to a simpler, more reliable pushrod engine design. These LS V8 engines were the only V8 engines used by Cadillac for the next eight years, until the clean sheet Blackwing V8 was introduced in 2018 in the 2019 Cadillac CT6-V . A Cadillac-exclusive, it was discontinued after just two years in early 2020. GM initiated what ultimately became

4350-440: The longitudinal engine orientation has a more balanced weight distribution leading to superior handling characteristics, but is less efficient in terms of packaging and interior space. Cars with longitudinal engines usually have a smaller minimum turning circle than those with transverse engines. This is because there is more space to the sides of the engine, allowing deeper wheel arches so the front wheels are able to turn through

4425-503: The main combustion chamber. Therefore, this principle is called indirect injection. There exist several slightly different indirect injection systems that have similar characteristics. Types of indirect injection used by diesel engines include: In 1872, George Bailey Brayton obtained a patent on an internal combustion engine that used a pneumatic fuel injection system, also invented by Brayton: air-blast injection . In 1894, Rudolf Diesel copied Brayton's air-blast injection system for

4500-426: The most powerful domestic front wheel drive cars ever built. For 2005 the high output Northstar became Northstar NHP, and was downrated to 290 hp (216 kW) under the new SAE certified horsepower rating system. In 2006, the updated DTS "Performance Package" model got a slight bump to 292 hp (218 kW). Vehicles using the L37 include: The 4.6 L; 278.6 cu in (4,565 cc) LD8 (VIN "Y")

4575-462: The pistons if they lose timing. It has bronze piston pin bushings and free-floating piston pins. GM used cast aluminum cylinder heads featuring 4 valves per cylinder. The heads used dual overhead cams driven through the "maintenance-free" cam-drive chain case. The cams act directly on hydraulic lifters on the ends of the valves and are fed with a lubrication passage drilled through the cylinder head lengthwise. The intake valves are inclined at 25°, while

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4650-710: The retirement of Oldsmobile in 2004. The LX5 is a DOHC V6 from Oldsmobile , introduced in 1999 with the Intrigue . It was produced by the Premium engine group at GM and was thus called the Premium V6, or PV6, while it was being developed. It is based on the L47 Aurora V8, which is itself based on the Northstar engine, so engineers called it the Short North, though Oldsmobile fans have taken to calling it

4725-446: The same Northstar bellhousing pattern . One notable feature advertised at the time was the "limp home" fail-safe mode, which allowed the engine to continue running for a limited time without any coolant. Supplying fuel to only one cylinder bank in turn, the engine would "air cool" the inactive bank. This technique, combined with its all-aluminum construction and large oil capacity, allows the engine to maintain safe temperatures, allowing

4800-452: The starter from engaging if the quiet L47 was already running. An early version or prototype of this engine was used in the 2nd generation Oldsmobile Aerotech . A highly modified 650 hp (485 kW) version of this engine was used by General Motors racing division initially for IMSA sports car competition in an Oldsmobile Aurora GTS-1 and Riley&Scott LMP prototypes in 1995, Indy Racing League competition starting in 1997, then

4875-494: The supercharged Northstars displaced 4.6 L; 278.6 cu in (4,565 cc) with a 93 mm × 84 mm (3.66 in × 3.31 in) bore and stroke. For better head gasket sealing between cylinders, the supercharged version is de-bored to 91 mm (3.58 in) for a total displacement of 4.4 L; 266.7 cu in (4,371 cc). The block is believed to be capable of expansion up to 5.4 L, though no such engine has been produced. The Northstar

4950-558: Was 87 mm × 84 mm (3.43 in × 3.31 in). The L47 had a 10.3:1 compression ratio and used premium fuel. Although most of the Northstar's features, including the coolant loss system, remained intact, the decreased bore increased weight unacceptably. To reduce it, Oldsmobile used a one-piece glass-filled thermoplastic intake manifold and simplified AC Rochester sequential fuel injection. A new die-cast structural aluminum oil pan incorporated baffling to reduce oil starvation in hard driving. A starter interlock prevented

5025-532: Was GM's corporate policy not to pass the gas guzzler tax on to the consumer. Cadillac was developing new models which they hoped would compete against the best luxury cars from BMW , Mercedes-Benz , and Asian rivals like Lexus , Acura , and Infiniti . GM developed a laundry list of items to be included in the Allanté and updated Eldorado and Seville STS , including sophisticated steering, braking, and suspension technologies, and an engine exclusive to "Cadillac"

5100-424: Was a two-stroke aircraft engine designed by Otto Mader in 1916. Another early spark-ignition engine to use direct-injection was the 1925 Hesselman engine , designed by Swedish engineer Jonas Hesselman. This engine could run on a variety of fuels (such as oil, kerosene, petrol or diesel oil) and used a stratified charge principle whereby fuel is injected towards the end of the compression stroke, then ignited with

5175-407: Was another early digital fuel injection system. These and other electronic manifold injection systems (using either port injection or throttle-body injection ) became more widespread through the 1980s, and by the early 1990s they had replaced carburettors in most new petrol-engined cars sold in developed countries. The aforementioned injection systems for petrol passenger car engines - except for

5250-679: Was later used in the Cadillac Northstar LMP program in 2000. Both engines retained the 4.0 L displacement, but the Northstar LMP version was twin-turbocharged. The Aurora was also used in the Shelby Series 1 car. In the inaugural DTM season , Opel would debut their Astra with a V8 derived from the L47. The Aurora engine was introduced in 1994 for the 1995 model year, and General Motors has not used this engine since

5325-424: Was on the Ward's 10 Best Engines list for 1995, 1996, and 1997. The 4.6L V8 engine found in models from 1995-2005 were notorious for failure due to a design flaw involving the use of torque-to-yield bolts in the head gasket . Essentially, these type of bolts are stretched beyond their elasticity upon installation, ultimately increasing wear and fatigue on the bolt and decreasing its service life. The high load of

5400-453: Was previously used in many diesel engines. Types of systems include: The M-System , used in some diesel engines from the 1960s to the 1980s, sprayed the fuel onto the walls of the combustion chamber, as opposed to most other direct-injection systems which spray the fuel into the middle of the chamber. Manifold injection systems are common in petrol-fuelled engines such as the Otto engine and

5475-594: Was sold exclusively by that name by Cadillac for over a decade before being introduced in the 2004-2005 Pontiac Bonneville and 2006 Buick Lucerne . However, the 4.0 L; 243.8 cu in (3,995 cc) L47 V8 Northstar variant was used in the Oldsmobile Aurora the 3.5L LX5 V6 in the Oldsmobile Intrigue and Oldsmobile Shelby Series 1. The LH2 engine variant received a forged steel crankshaft in October 2003. The LD8 and L37 variants received

5550-473: Was the Fiat Multijet straight-four engine, introduced in the 1999 Alfa Romeo 156 1.9 JTD model. Since the 2010s, many petrol engines have switched to direct-injection (sometimes in combination with separate manifold injectors for each cylinder). Similarly, many modern diesel engines use a common-rail design. Stratified charge injection was used in several petrol engines in the early 2000s, such as

5625-541: Was used on all Northstar equipped Cadillacs while the Deville Concours, Eldorado ETC, Seville STS, and in 2000 the Deville DTS, were fitted with the 300 hp (224 kW) version. The original Northstar Allanté also introduced the Northstar System which included traction control , adaptive suspension , and antilock brakes . Early Northstar required premium grade gasoline to run safely. The Northstar

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