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74-676: In Europe, the model was presented at the 2018 Geneva Motor Show , and sales began later that year with the 2019 model. In 2018 production of the C5 Aircross started as well in France at the PSA plant in Rennes . The model takes advantage of the 100-million-euro investment share of Groupe PSA . The C5 Aircross is also assembled in India as CKD since January 2021. On the technical side, the C5 Aircross

148-429: A clutchless manual , is a type of multi-speed automobile transmission system that is closely based on the mechanical design of a conventional manual transmission , and automates either the clutch system, the gear shifting, or both simultaneously, requiring partial, or no driver input or involvement. Earlier versions of these transmissions that are semi-automatic in operation, such as Autostick , control only

222-508: A constant angular velocity while the vehicle moves at varying speeds. CVTs are used in cars , tractors , UTVs , motor scooters , snowmobiles , and earthmoving equipment . The most common type of CVT uses two pulleys connected by a belt or chain , however, several other designs have also been used. A dual-clutch transmission (DCT, sometimes referred to as a twin-clutch transmission , or double-clutch transmission ) uses two separate clutches for odd and even gear sets . The design

296-479: A form of manual transmission which removed the reliance on the driver's skill to achieve smooth gear shifts. The first automatic transmission using hydraulic fluid was developed in 1932 by two Brazilian engineers, José Braz Araripe and Fernando Lehly Lemos. The evolution towards mass-produced automatic transmissions continued with the 1933–1935 REO Motor Car Company Self-Shifter semi-automatic transmission, which automatically shifted between two forward gears in

370-538: A gearbox, operated manually or automatically, to drive the wheels over a wide range of speeds. Globally, 43% of new cars produced in 2015 were manual transmissions, falling to 37% by 2020. Automatic transmissions have long been prevalent in the United States, but only started to become common in Europe much later. In Europe in 1997, only 10–12% of cars had automatic transmissions. In 1957 over 80% of new cars in

444-413: A manual transmission. The 1904 Sturtevant "horseless carriage gearbox" is often considered to be the first automatic transmission for motor vehicles. At higher engine speeds, high gear was engaged. As the vehicle slowed down and engine speed decreased, the gearbox would shift back to low. However, the transmission was prone to sudden failure, due to the transmission being unable to withstand forces from

518-400: A patent was approved in the United States describing the operation of a transmission where the manual shifting of gears and manual operation of a clutch was eliminated. This patent was submitted by Henry R. Hoffman from Chicago and was titled: Automatic Gear Shift and Speed Control . The patent described the workings of such a transmission as "...having a series of clutches disposed intermediate

592-544: A plug-in hybrid powertrain. Introduced in November 2019, the plug-in hybrid system combines a PureTech 180 gasoline engine that develops 180 PS (178 hp; 132 kW) with an 80 kW (109 PS; 107 hp) electric motor, with a fully-electric range of around 50 km (31 mi) under WLTP testing standards. Sales in China started in the fall of 2017 for the 2018 model year . The engine options in China are

666-408: A revised format to reduce costs for exhibitors. The 2024 edition highlighted serious organizational shortcomings, which resulted in lower participation or the total absence of the manufacturers. As of January 26, 2024, automakers that are confirmed to present at the show in 2024 are: The following vehicles were first presented at the show: The ongoing COVID-19 pandemic along with "uncertainties in

740-448: A separate transmission control unit . This allows for more precise control of shift points, shift quality, lower shift times and manual control. The first five-speed automatic was the ZF 5HP18 transmission , debuting in 1991 on various BMW models. The first six-speed automatic was the ZF 6HP26 transmission , which debuted in the 2002 BMW 7 Series (E65) . The first seven-speed automatic was

814-459: Is a multi-speed transmission used in motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions. Vehicles with internal combustion engines , unlike electric vehicles , require the engine to operate in a narrow range of rates of rotation, requiring a gearbox , operated manually or automatically, to drive the wheels over a wide range of speeds. The most common type of automatic transmission

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888-577: Is attributed to the increasing number of electric and hybrid cars, and the ease of integrating it with safety systems such as Autonomous Emergency Braking . The efficiency, power output as a percentage of input, of conventional automatic transmissions ranges from 86 to 94%. Manual transmissions are more fuel efficient than all but the newest automatic transmissions due to their inherently low parasitic losses, typically of about 4%, in addition to being cheaper to make, lighter, better performing, and of simpler mechanical design. However, manual transmissions have

962-521: Is connected to the engine via a torque converter (or a fluid coupling prior to the 1960s), instead of the friction clutch used by most manual transmissions . A hydraulic automatic transmission uses planetary gearsets instead of the manual transmission's design of gears lined up along input, output and intermediate shafts. To change gears, the hydraulic automatic uses a combination of internal clutches, friction bands or brake packs. These devices are used to lock certain gears, thus setting which gear ratio

1036-404: Is in use at a given time. A sprag clutch (a ratchet-like device which can freewheel and transmits torque in only one direction) is often used for routine gear shifts. The advantage of a sprag clutch is that it eliminates the sensitivity of timing a simultaneous clutch release/apply on two planetary gearsets, simply "taking up" the drivetrain load when actuated, and releasing automatically when

1110-452: Is integrated into the engine control unit (ECU). Modern designs have replaced the centrifugal governor with an electronic speed sensor that is used as an input to the TCU or ECU. Modern transmissions also factor in the amount of load on an engine at any given time, which is determined from either the throttle position or the amount of intake manifold vacuum. The multitude of parts, along with

1184-457: Is not possible to push start a vehicle equipped with an automatic transmission with no rear pump (aside from several automatics built prior to 1970, which also included a rear pump for towing and push-starting purposes). The pressure of the ATF is regulated by a governor connected to the output shaft, which varies the pressure depending on the vehicle speed. The valve body inside the transmission

1258-513: Is often similar to two separate manual transmissions with their respective clutches contained within one housing, and working as one unit. In most car and truck applications, the DCT functions as an automatic transmission, requiring no driver input to change gears. The first DCT to reach production was the Easidrive automatic transmission introduced on the 1961 Hillman Minx mid-size car. This

1332-466: Is part of the Citroën "Advanced Comfort" program. Efforts have focused, in particular, on interior space and interior luminosity (notably through a large panoramic sliding roof) and on suspension comfort, via a new progressive hydraulic thrust system. The C5 Aircross is equipped with optional 12.3-inch TFT digital dashboard screen and an 8-inch capacitive HD touchscreen . In terms of driving aids ,

1406-450: Is pressurized by a pump and then directed to the appropriate bands/clutches to obtain the required gear ratio. The ATF provides lubrication, corrosion prevention, and a hydraulic medium to transmit the power required to operate the transmission. Made from petroleum with various refinements and additives, ATF is one of the few parts of the automatic transmission that needs routine service as the vehicle ages. The main pump which pressurises

1480-403: Is responsible for directing hydraulic pressure to the appropriate bands and clutches. It receives pressurized fluid from the main pump and consists of several spring-loaded valves, check balls, and servo pistons. In older automatic transmissions, the valves use the pump pressure and the pressure from a centrifugal governor on the output side (as well as other inputs, such as throttle position or

1554-460: Is the hydraulic automatic , which uses a planetary (epicyclic) gearset , hydraulic controls , and a torque converter . Other types of automatic transmissions include continuously variable transmissions (CVT), automated manual transmissions (AMT), and dual-clutch transmissions (DCT). The 1904 Sturtevant "horseless carriage gearbox" is often considered to be the first true automatic transmission. The first mass-produced automatic transmission

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1628-522: Is the General Motors Hydramatic four-speed hydraulic automatic, which was introduced in 1939. Automatic transmissions are also found in some heavy commercial vehicles, particularly those which are subject to intense stop/start operation such as buses and waste collection vehicles . Vehicles with internal combustion engines, unlike electric vehicles, require the engine to operate in a narrow range of rates of rotation, requiring

1702-633: The Mercedes-Benz 7G-Tronic transmission , which debuted a year later. In 2007, the first eight-speed transmission to reach production was the Toyota AA80E transmission . The first nine-speed and ten-speed transmissions were the 2013 ZF 9HP transmission and 2017 Toyota Direct Shift-10A (used in the Lexus LC ) respectively. The gear selector is the input by which the driver selects the operating mode of an automatic transmission. Traditionally

1776-475: The clutch system automatically — and use different forms of actuation (usually via an actuator or servo ) to automate the clutch, but still require the driver's input and full control to manually actuate gear changes by hand. Modern versions of these systems that are fully automatic in operation, such as Selespeed and Easytronic , require no driver input over gear changes or clutch operation. Semi-automatic versions require only partial driver input (i.e.,

1850-654: The "Forward" mode (or between two shorter gear ratios in the "Emergency low" mode). Driver involvement was still required during normal driving, since standing starts required the driver to use the clutch pedal. This was followed in 1937 by the Oldsmobile Automatic Safety Transmission . Similar in operation to the REO Self-Shifter , the Automatic Safety Transmission shifted automatically between

1924-437: The 1.6-litre PureTech 180 PS (178 hp; 132 kW), as well as two diesel versions: the 1.5-litre BlueHDi 130 PS (128 hp; 96 kW) and the 2.0-litre BlueHDi 180 PS (178 hp; 132 kW). Depending on the version, these different engines can be coupled to a six-speed manual gearbox, or an eight-speed EAT8 automatic transmission. The C5 Aircross is also the first Citroën vehicle equipped with

1998-424: The 1980s, automatic transmissions with four gear ratios became increasingly common, and many were equipped with lock-up torque convertors in order to improve fuel economy. Electronics began to be more commonly used to control the transmission, replacing mechanical control methods such as spring-loaded valves in the valve body. Most systems use solenoids which are controlled by either the engine control unit , or

2072-406: The 1990s, systems to manually request a specific gear or an upshift/downshift have become more common. These manumatic transmissions offer the driver greater control over the gear selection that the traditional modes to restrict the transmission to the lower gears. Use of the manumatic functions are typically achieved either via paddles located beside the steering column, or "+" and "-" controls on

2146-502: The 1993 Geneva show: The following introductions were made at the 1992 Geneva show: The following introductions were made at the 1991 Geneva show: The following introductions were made at the 1990 Geneva show: The following introductions were made at the 1989 Geneva show: The following introductions were made at the 1988 Geneva show: The following introductions were made at the 1987 Geneva show: Automatic transmission An automatic transmission (sometimes abbreviated AT )

2220-404: The 1999 Geneva show: The following concepts and major launches featured at the 1998 Geneva show: The following introductions were made at the 1997 Geneva show: The following introductions were made at the 1996 Geneva show: The following introductions were made at the 1995 Geneva show: The following introductions were made at the 1994 Geneva show: The following introductions were made at

2294-480: The 2005 Geneva show: The following introductions were made from 4 to 14 March 2004 at the Geneva show: The following introductions were made at the 2003 Geneva show: The following introductions were made at the 2002 Geneva show: The following major introductions were made at the 2001 Geneva show: The following introductions were made at the 2000 Geneva show: The following concepts and major launches featured at

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2368-475: The 2022 cancellation of Swiss location. The 90th Geneva Motor Show was planned for 5 to 15 March 2020, but it was cancelled due to the COVID-19 pandemic. Switzerland's decision to impose a limit on gatherings of over 1,000 people was cited as the reason for the cancellation. It was one of the first of many major automotive events to be cancelled due to COVID-19. The following vehicles were to be presented at

2442-489: The 225 hp (168 kW) hybrid version that also has electric range. or 8-Speed- Automatic transmission or 6-Speed- Automatic transmission The Citroën C5 Aircross was previewed by the Citroën Aircross concept car shown at the 2015 Shanghai Motor Show , measuring 4,580 mm (180 in) in length and fitted with 22-inch wheels. Geneva Motor Show#2018 The Geneva International Motor Show

2516-425: The ATF is typically a gear pump mounted between the torque converter and the planetary gear set. The input for the main pump is connected to the torque converter housing, which in turn is bolted to the engine's flexplate, so the pump provides pressure whenever the engine is running. A disadvantage of this arrangement is that there is no oil pressure to operate the transmission when the engine is not running, therefore it

2590-491: The C5 Aircross offers optional automatic emergency braking , blind spot monitoring or adaptive cruise control (with automatic stop). A torque vectoring system marketed as the Grip Control and start assist are also available. Lane-keeping assistance and traffic sign recognition were optional. The European version has a choice of two petrol engines: the 1.2-litre PureTech 130 PS (128 hp; 96 kW) and

2664-534: The Corvair. Most cars use a "P–R–N–D–L" layout for the gear selector, which consists of the following positions: Some automatic transmissions, especially by General Motors from 1940 to 1964, used a layout with reverse as the bottom position (e.g. N–D–L–R or P–N–D–L–R). Many transmissions also include positions to restrict the gear selection to the lower gears and engages the engine brake . These positions are often labelled "L" (low gear), "S" (second gear) or

2738-649: The European model, it was renamed from Dongfeng Citroën Tianyi C5 Aircross to Dongfeng Citroën Tianyi Beyond (or more rarely Dongfeng Citroën Tianyi Beyond C5 Aircross, as the name "C5 Aircross" is still present on the tailgate). In India, the facelift model was launched in September 2022. From 2023, CKD C5 Aircross are sent by Stellantis Chinese partner Dongfeng Motor Corporation to the former Stellantis Kaluga plant, in Russia. Stellantis being out of this country since

2812-616: The Hydra-Matic included a wide spread of ratios (allowing both good acceleration in first gear and cruising at low engine speed in top gear) and the fluid coupling handling only a portion of the engine's torque in the top two gears (increasing fuel economy in those gears, similar to a lock-up torque converter). Use of the Hydra-Matic spread to other General Motors brands and then to other manufacturers starting 1948 including Hudson , Lincoln , Kaiser , Nash , Holden (Australia), as well as Rolls-Royce and Bentley licensing production in

2886-578: The UK and providing the transmission to Jensen Motors , Armstrong Siddeley and other UK manufacturers. During World War II, the Hydra-Matic was used in some military vehicles. The first automatic transmission to use a torque converter (instead of a fluid coupling) was the Buick Dynaflow , which was introduced for the 1948 model year. In normal driving, the Dynaflow used only the top gear, relying on

2960-672: The United States had automatic transmissions. Automatic transmissions have been standard in large cars since at least 1974. By 2020 only 2.4% of new cars had manual transmissions. Historically, automatic transmissions were less efficient, but lower fuel prices in the US made this less of a problem than in Europe. In the United Kingdom, a majority of new cars have had automatic transmissions since 2020. Several manufacturers including Mercedes and Volvo no longer sell cars with manual transmissions. The growing prevalence of automatic transmissions

3034-429: The abrupt gear changes. The adoption of planetary gearsets was a significant advance towards the modern automatic transmission. One of the first transmissions to use this design was the manual transmission fitted to the 1901–1904 Wilson-Pilcher automobile. This transmission was built in the United Kingdom and used two epicyclic gears to provide four gear ratios. A foot clutch was used for standing starts, gear selection

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3108-511: The biennal exhibitions in Qatar during the fourth quarter along with the annual exhibitions in the Switzerland during the first quarter. The 2021 and 2022 exhibitions were cancelled due to the continued COVID-19 pandemic measures. The Qatari location was to be held in November 2022, but it was postponed to 2023 for the same reason. The global chip shortage was also cited as a factor in

3182-401: The complex design of the valve body, originally made hydraulic automatic transmissions much more expensive and time-consuming to build and repair than manual transmissions; however mass-production and developments over time have reduced this cost gap. To provide coupling and decoupling of the engine, a modern automatic transmission uses a torque converter instead of the friction clutch used in

3256-403: The disadvantage of requiring the driver to operate the clutch and change the gear whenever required. Fuel economy of course worsens with lower efficiency. Real-world tests reported in 2022 found that in typical driving manual transmissions achieved 2 to 5% better fuel economy than automatics, increasing to 20% with an expert driver. Some laboratory tests show automatics in a better light due to

3330-446: The driver locking out the higher gears) to control which ratio is selected. As the vehicle and engine change speed, the difference between the pressures changes, causing different sets of valves to open and close. In more recent automatic transmissions, the valves are controlled by solenoids . These solenoids are computer-controlled, with the gear selection decided by a dedicated transmission control unit (TCU) or sometimes this function

3404-402: The driver must change gears manually), while fully automatic versions require no manual driver input, whatsoever ( TCU or ECU operates both the clutch system and gear shifts automatically). Modern automated manual transmissions (AMT) have their roots and origins in older clutchless manual transmissions that began to appear on mass-production automobiles in the early 1930s and 1940s, prior to

3478-411: The engine shaft and the differential shaft and in which the clutches are arranged to selectively engage and drive the differential shaft dependent upon the speed at which the differential shaft rotates". However, it would be over a decade later until automatic transmissions were produced in significant quantities. In the meantime, several European and British manufacturers would use preselector gearboxes ,

3552-591: The first mass-produced automatic transmission following its introduction in 1939 (1940 model year). Available as an option in cars such as the Oldsmobile Series 60 and Cadillac Sixty Special , the Hydra-Matic combined a fluid coupling with three hydraulically controlled planetary gearsets to produce four forward speeds plus reverse. The transmission was sensitive to engine throttle position and road speed, producing fully automatic up- and down-shifting that varied according to operating conditions. Features of

3626-433: The gear selector is located between the two front seats or on the steering column, however electronic rotary dials and push-buttons have also been occasionally used since the 1980s, as well as push buttons having been used in the 1950s and 1960s by Rambler (automobile) , Edsel , and most famously, by Chrysler . A few automobiles employed a lever on the instrument panel, such as the 1955 Chrysler Corporation cars, and notably,

3700-401: The gear selector. Some cars offer drivers both methods to request a manual gear selection. A continuously variable transmission (CVT) can change seamlessly through a continuous (infinite) range of gear ratios, compared with other automatic transmissions that provide a limited number of gear ratios in fixed steps. The flexibility of a CVT with suitable control may allow the engine to operate at

3774-733: The global economy and geopolitics" in 2022 led the organisers to cancel the Swiss location for 2023 (fourth year in row) and to postpone the Qatari location until October 2023. Another contributing factor was less commitments from the manufacturers for the Swiss location. The dates for the Qatar Motor Show were confirmed to be from 5 to 14 October 2023. In 2021, the Geneva International Motor Show organisers entered into an agreement with Qatari government to hold

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3848-399: The history of the automobile, along with benzene- and steam-powered cars from the beginning of the century. Exotic supercars often steal the spotlight during their debuts at the show. Prototypes, new equipment, technical breakthroughs, international partnerships , as well as political and social debates, have been announced at the exhibition. The show was regarded as a level playing field for

3922-560: The interior, the European version has three individual adjustable and foldable seats, while the Chinese model has a fixed folding 60:40 bench at the back. The European C5 Aircross gets a facelift in January 2022, with a major redesign of the front end, minor redesign of the rear end and new interior features. The Chinese version is facelifted in July 2022. With the similar exterior changes to

3996-406: The introduction of hydraulic automatic transmissions. These systems were designed to reduce the amount of clutch or gear shifter usage required by the driver. These devices were intended to reduce the difficulty of operating conventional unsynchronised manual transmissions ("crash gearboxes") that were commonly used at the time, especially in stop-start driving. An early example of this transmission

4070-443: The next gear's sprag clutch assumes the torque transfer. The friction bands are often used for manually selected gears (such as low range or reverse) and operate on the planetary drum's circumference. Bands are not applied when the drive/overdrive range is selected, the torque being transmitted by the sprag clutches instead. The aforementioned friction bands and clutches are controlled using automatic transmission fluid (ATF), which

4144-681: The number of the highest gear used in that position (eg 3, 2 or 1). If these positions are engaged at a time when it would result in excessive engine speed, many modern transmissions disregard the selector position and remain in the higher gear. In descending order of the highest gear available: Many modern transmissions include modes to adjust the shift logic to prefer either power or fuel economy . "Sport" (also called "Power" or "Performance") modes cause gear shifts to occur at higher engine speeds, allowing higher acceleration. "Economy" (also called "Eco" or "Comfort") modes cause gear shifts to occur at lower engine speeds to reduce fuel consumption. Since

4218-579: The sanctions against Russia following the Russian invasion of Ukraine in 2022, these operations are done without its endorsement. Stellantis states having lost control of its Russian entities. The company based in Russia that assembles these CKD kits using the Kaluga plant is named "Automotive Technologies". In November 2022, the C5 Aircross received a 180 hp (130 kW) plug-in hybrid version. Its petrol engine develops 150 hp (110 kW), less than

4292-426: The show in 2020: The 89th Geneva Motor Show was held between 7 and 17 March 2019. The 88th Geneva Motor Show was held on 8 to 18 March 2018. The 87th Geneva Motor Show was held from 9 to 19 March 2017. The 86th Geneva Motor Show was held from 3 to 13 March 2016. The 85th Geneva Motor Show was held from 5 to 15 March 2015. The 84th Geneva Motor Show was held from 6 to 16 March 2014. The 83rd Geneva Motor Show

4366-481: The show scheduled for November 2025 in Qatar. Areas of the show: The International Advanced Mobility Forum is the Geneva Motor Show forum on the mobility of the future. The organizers of the car show have announced the closure. While they will continue to organize the Qatar Motor Show , at Doha . In July 2023, plans were announced for the 2024 Geneva Motor Show from 26 February to 3 March, with

4440-527: The standard modern turbocharged 1.6-litre (350THP) and 1.8-litre (380THP) engines that are used as well in the Chinese Citroën C5 and C6 and the Peugeot 4008 and 5008 and the Peugeot 508 and some DS models. All these models use the 6 speed third-generation Tiptronic automatic transmission. The European and Chinese cars are largely identical, apart from the engine and gearbox options. In

4514-424: The tests using a prescribed shifting pattern for manuals not always optimized for economy. However, on long highway journeys manual transmissions require maintaining a very specific cruising speed to optimise economy, making automatics preferable. The most common design of automatic transmissions is the hydraulic automatic, which typically uses planetary gearsets that are operated using hydraulics. The transmission

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4588-622: The torque multiplication of the torque convertor at lower speeds. The Dynaflow was followed by the Packard Ultramatic in mid-1949 and the Chevrolet Powerglide for the 1950 model year. Each of these transmissions had only two forward speeds, relying on the converter for additional torque multiplication. In the early 1950s, BorgWarner developed a series of three-speed torque converter automatics for car manufacturers such as American Motors, Ford and Studebaker. Chrysler

4662-441: The two gear ratios available in the "Low" and "High" ranges and the clutch pedal was required for standing starts. It used a planetary gearset. The Chrysler Fluid Drive , introduced in 1939, was an optional addition to manual transmissions where a fluid coupling (similar to a torque-convertor, but without the torque multiplication) was added, to avoid the need to operate a manual clutch. The General Motors Hydra-Matic became

4736-596: The world's automakers, aided by the fact Switzerland lacked an auto industry of its own. The Geneva International Motor Show was not held in 2020-2023 due to the COVID-19 pandemic and its economic impact on the global automobile industry. The event returned in 2024. In May 2024 the Geneva Show organizing committee decided to cancel the event for 2025 and beyond, citing a general lack of interest by manufacturers and competition from other shows. It shifted its focus to

4810-418: Was among the first to have the basic gear selections ( park , reverse , neutral , drive , low ) which became the standard gear selection used for several decades. By the late 1960s, most of the fluid-coupling two-speed and four-speed transmissions had disappeared in favor of three-speed units with torque converters. Also around this time, whale oil was removed from the automatic transmission fluid. During

4884-829: Was an annual auto show held in March in the Swiss city of Geneva . The show was hosted at the Palexpo , a convention centre located next to the Geneva Cointrin International Airport. The Salon was organised by the Organisation Internationale des Constructeurs d'Automobiles , and was considered an important major international auto show. First held in 1905, the Salon hosted almost all major internal combustion engined models in

4958-644: Was called the Controlled Coupling Hydra-Matic , or "Jetaway" transmission. The original Hydra-Matic remained in production until the mid-1960s at GM, with the licensed Rolls-Royce Automatic transmission soldiering on until 1978 on the Rolls-Royce Phantom VI . In 1964, General Motors released a new transmission, the Turbo Hydramatic , a three-speed transmission which used a torque convertor. The Turbo Hydramatic

5032-506: Was followed by various eastern European tractors through the 1970s (using manual operation via a single clutch pedal), then the Porsche 962 C racing car in 1985. The first DCT of the modern era was used in the 2003 Volkswagen Golf R32 . Since the late 2000s, DCTs have become increasingly widespread, and have supplanted hydraulic automatic transmissions in various models of cars. Automated manual transmission (AMT) , sometimes referred to as

5106-442: Was held from 6–16 March 2008. The following vehicles were introduced: The 2007 Geneva Auto Show was held from 8–18 March 2007. The following vehicles were introduced: In addition, Subaru introduced its new boxer diesel engine , and Honda showed its next generation clean diesel engine . The 2006 Geneva Auto Show was held from 3–19 March 2006. The following vehicles were introduced: The following introductions were made at

5180-492: Was held from 7 to 17 March 2013. The 82nd edition was held from 8 to 18 March 2012. The 2011 edition was held from 3 to 13 March 2011. The 80th edition of the Geneva Motor Show was held from 4–14 March 2010. Over 80 introductions were expected for the show. Press days for the show started on 2 March 2010, when most of the major introductions occurred. The 2009 Geneva Motor Show was held from 5–15 March 2009. The following vehicles were introduced: The 2008 Geneva Motor Show

5254-541: Was introduced in the 1955 Citroën DS , which used a 4-speed BVH transmission. This semi-automatic transmission used an automated clutch, which was actuated using hydraulics . Gear selection also used hydraulics , however, the gear ratio needs to be manually selected by the driver. This system was nicknamed Citro-Matic in the U.S. The first modern AMTs were introduced by BMW and Ferrari in 1997, with their SMG and F1 transmissions, respectively. Both systems used hydraulic actuators and electrical solenoids , and

5328-639: Was introduced with the Hudson Commodore in 1942, called Drive-Master . This unit was an early semi-automatic transmission , based on the design of a conventional manual transmission, which used a servo -controlled vacuum -operated clutch system, with three different gear shifting modes, at the touch of a button; manual shifting and manual clutch operation (fully manual), manual shifting with automated clutch operation (semi-automatic), and automatic shifting with automatic clutch operation (fully automatic). Another early example of this transmission system

5402-548: Was late in developing its own true automatic, introducing the two-speed torque converter PowerFlite in 1953, and the three-speed TorqueFlite in 1956. The latter was the first to utilize the Simpson compound planetary gearset. In 1956, the General Motors Hydra-Matic (which still used a fluid coupling) was redesigned based around the use of two fluid couplings to provide smoother shifts. This transmission

5476-551: Was using a hand lever, helical gears were used (to reduce noise) and the gears used a constant-mesh design. A planetary gearset was also used in the 1908 Ford Model T , which was fitted with a two-speed manual transmission (without helical gears). An early patent for the automatic transmission was granted to Canadian inventor Alfred Horner Munro of Regina in 1923. Being a steam engineer, Munro designed his device to use compressed air rather than hydraulic fluid , and so it lacked power and never found commercial application. In 1923,

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