What does 4WD vehicle mean?
1 Answers
4WD vehicle refers to the four-wheel drive system, which is the abbreviation of Four Wheel Drive. Initially, four-wheel drive was mainly used in rugged off-road vehicles, but now it is also applied to urban SUVs. The advantage of four-wheel drive is that all four wheels are driven. For example, when driving on muddy roads, if one wheel or the front two wheels get stuck, the rear two wheels can still drive, allowing the vehicle to pass smoothly. 4WD provides better tire traction and steering force and is classified as an active safety system. 4WD is divided into three types: on-demand four-wheel drive, part-time four-wheel drive, and full-time four-wheel drive. On-demand four-wheel drive automatically detects poor road conditions or wheel slippage, and the vehicle's computer distributes the engine's output torque to the two front wheels, naturally switching to four-wheel drive mode. Part-time four-wheel drive allows the driver to switch between two-wheel drive and four-wheel drive modes by engaging or disengaging the transfer case based on road conditions. Full-time four-wheel drive system does not require driver intervention; the front and rear wheels always maintain four-wheel drive mode. During driving, the engine's output torque is distributed equally (50:50) between the front and rear wheels, ensuring balanced torque for both front and rear wheels.
