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Automated manual transmissions can be semi-automatic or fully-automatic in operation. Several different systems to automate the clutch and/or shifting have been used over the years, but they will generally use one of the following methods of actuation for the clutch and/or shifting: hydraulic or electro-hydraulic actuation, [12] electro-mechanical, [13] pneumatic, [6] [14] [15] electromagnetic ...
Automatic transmissions have been standard in large cars since at least 1974. [5] By 2020 only 2.4% of new cars had manual transmissions. [6] Historically, automatic transmissions were less efficient, but lower fuel prices in the US made this less of a problem than in Europe. [7]
The most common design of automatic transmissions is the hydraulic automatic, which typically uses planetary gearsets that are operated using hydraulics. [ 11 ] [ 12 ] 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 and ...
This was quickly changed to "Hondamatic". This gearbox was a separate unit and used ATF - Automatic Transmission Fluid. The company's naming scheme is also confusing, as it is specific to a single model of the vehicle and some identifiers are reused. Below is a list of Honda automatic transmissions: [4] 1973–1979 H2 — 2-speed
GM's Automatic Safety Transmission (AST) was a semi-automatic transmission released in 1937. The first mass-produced fully-automatic transmission developed for passenger automobile use was the GM Hydramatic introduced in 1940. [1] The Hydramatic was a big success, and had been installed in the majority of GM models by 1950.
A direct-shift gearbox (DSG, German: Direktschaltgetriebe [1]) [2] [3] is an electronically controlled, dual-clutch, [2] multiple-shaft, automatic gearbox, in either a transaxle or traditional transmission layout (depending on engine/drive configuration), with automated clutch operation, and with fully-automatic [2] or semi-manual gear selection.