Back Outomatiese ratkas Afrikaans ناقل حركة أوتوماتيكي Arabic Аўтаматычная каробка перадач Byelorussian Transmissió hidràulica automàtica Catalan Automatgear Danish Automatikgetriebe German Transmisión automática Spanish Automaatkäigukast Estonian Transmisio automatiko Basque جعبهدنده خودکار Persian
An automatic transmission (sometimes abbreviated AT) 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.
The 1904 Sturtevant "horseless carriage gearbox" is often considered to be the first true automatic transmission.[1][2][failed verification] The first mass-produced automatic transmission is the General Motors Hydramatic four-speed hydraulic automatic, which was introduced in 1939.
Automatic transmissions are especially prevalent in vehicular drivetrains, particularly those subject to intense mechanical acceleration and frequent idle/transient operating conditions; commonly commercial/passenger/utility vehicles, such as buses and waste collection vehicless.
- ^ "Automatic Transmissions- A Brief History". AutoServiceExperts. 2003. Archived from the original on 2020-04-18.
- ^ Hearst Autos Research (13 April 2020). "What is an Automatic Car?". Car and Driver. Archived from the original on 2020-04-17.