When to Use High-Speed Four-Wheel Drive?

[McBenjamin]

High-speed four-wheel drive is used on gravel roads, in rainy or snowy weather, and when quick passage is needed. Four-wheel drive refers to a vehicle maintaining four-wheel drive throughout the entire driving process, with the engine's output torque distributed to the front and rear wheels at a fixed ratio. This driving mode ensures good off-road and handling performance at all times, but it cannot adjust torque distribution based on road conditions and has higher fuel consumption. The high-speed four-wheel drive mode is the 4H mode. There are three common four-wheel drive systems in vehicles: full-time four-wheel drive, part-time four-wheel drive, and on-demand four-wheel drive. These three systems have different structures and functions.