|
An AWD vehicle (short for All-wheel drive vehicle) is one with a powertrain capable of providing power to all its wheels, whether full-time or on-demand. The most common forms of AWD are: *4×4, also known as four-wheel drive and "4WD", reflecting two axles with both wheels on each capable of being powered. *6×6, also known as six-wheel drive and "6WD", reflecting three axles with both wheels on each capable of being powered *8×8, also known as eight-wheel drive and "8WD", reflecting four axles with both wheels on each capable of being powered Vehicles may be either part-time all-wheel drive or full-time: * On-demand, also known as "part-time", where one axle is permanently connected to the drive, the other is being connected as needed * Full-time, also known as "permanent," where axles are permanently connected, with or without a differential. ==Usage of the terminology== Today, the designation AWD is becoming narrowed, particularly in the US, to apply to vehicles with drive train systems that have permanent drive and usually include a differential between the front and rear drive shafts. However, the designations AWD〔Allisons.org ''Automotive History'' ()"1929: AEC started to build AWD trucks in conjunction with FWD (UK)"〕 and "all-wheel drive"〔MEYER, DONALD E. ''THE FIRST CENTURY OF GMC TRUCK HISTORY'' () "By December 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「AWD (vehicle)」の詳細全文を読む スポンサード リンク
|