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Manufacturer. Automotive Products for British Motor Corporation. Production. 1965-2000. Body and chassis. Class. 4-speed transverse automatic transmission. The AP automatic transmission is a 4-speed automatic transmission unit developed by Automotive Products and the British Motor Corporation specifically for use in the Mini .
AP also developed a close technical partnership with the British Motor Corporation (BMC), in the development of automatic transmissions. One of the most notable products of this collaboration was the unique AP automatic transmission used in the Mini and later BMC/BL compact models.
- Prevalence
- Efficiency
- Hydraulic Automatic Transmission
- Continuously Variable Transmission
- Dual-Clutch Transmission
- Automated Manual Transmission
- See Also
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. Globally, 43% of new cars produced in 2015 were manual transmissions, falling to 37% by 2020.Automatic tr...
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 ...
Design
The most common design of automatic transmissions is the hydraulic automatic, which typically uses planetary gearsets that are operated using hydraulics. The transmission 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.
Gear selectors
The gear selector is the input by which the driver selects the operating mode of an automatic transmission. Traditionally 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...
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 a constant angular velocity while the vehicle...
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 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 applic...
Automated manual transmission (AMT), sometimes referred to as 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 i...
AP Racing is a UK-based company that produces performance brake and clutch systems for road and race cars. It developed the first automatic transmission for small cars in 1962, which was a breakthrough in volume production engineering and assembly techniques.
Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer, or planet, gears or pinions, revolving about a central sun gear or sun wheel. [4] [5] Typically, the planet gears are mounted on a movable arm or carrier, which itself may rotate relative to the sun gear.
The AP automatic transmission is a 4-speed automatic transmission unit developed by Automotive Products and the British Motor Corporation specifically for use in the Mini.
4.4 Automatisierte Schaltgetriebe. 4.4.1 Klassisches automatisiertes Schaltgetriebe (ASG) 4.4.1.1 Vor- und Nachteile. 4.4.1.2 Verbreitung. 4.4.2 Doppelkupplungsgetriebe. 4.4.2.1 Vor- und Nachteile. 4.4.2.2 Verbreitung. 4.5 Wandler-Automatikgetriebe. 4.5.1 Vor- und Nachteile. 4.5.2 Funktion und Steuerung. 4.5.3 Sicherheit. 4.6 Stufenlose Getriebe.
