Vehicle transmission system in which engine power is applied to all four wheels. The term 4x4 (four by four) has the specific connotation that it is a four (wheeled vehicle driven) by four (wheels).
No more than two wheels may be driven in Formula One. Four-wheel drive has been banned since the end of 1971.
a motor vehicle with a four-wheel drive transmission system
a transmission that provides power directly to all four wheels of a motor vehicle
A drivetrain configuration in which two or all four wheels can be driven by the engine.
Available on an increasing number of passenger cars as well as the traditional off-roaders, the chief advantage of 4WD is added traction (grip) on slippery surfaces. Disadvantages include higher purchase price, increased weight (and consequently higher fuel consumption) and higher repair costs.
Drive system that powers all four wheels. It provides better traction during adverse road conditions and for off-road use.
System in which power can be transmitted to four road wheels instead of two.
A gearing system that allows all four wheels to be drive wheels rather than just the front 2 or rear 2. Four-wheel drive gives better traction than 2 wheel drive, but should be used only when needed because it doesn't work efficiently under normal road conditions.
A system in which the driver can switch the power from two wheels to all four wheels, giving greater power, traction, and control.
A method of driving a vehicle by applying engine torque to all four wheels. Various schemes are used for 4WD including part-time, full-time and variable four-wheel drive. The primary advantage of four-wheel drive is increased traction-which is especially
Trucks or SUVs that have 4WD have all four wheels being driven simultaneously. In addition, they usually have a 2WD setting that only drives the back wheels. Often comes with a low-range gear setting and locking differential for off-road or poor weather traction. See also: all-wheel drive and rear differential lock.
Four-wheel drive, 4WD, 4x4 ("four by four"), all-wheel drive, or AWD, is a four-wheeled vehicle with a drivetrain that allows all four wheels to receive power from the engine simultaneously. In the United States, these cars are included in the broader sport utility vehicle category. While many people associate the term with off-road vehicles, powering all four wheels provides better control on many surfaces, and is an important part of rally racing on mostly-paved roads.