What do L4 and H4 mean in four-wheel drive?
1 Answers
H4 stands for High-speed four-wheel drive, while L4 stands for Low-speed four-wheel drive. Here are the relevant introductions: 1. Application of high and low-speed four-wheel drive: High-speed four-wheel drive is suitable for driving on gravel roads, muddy roads, snow, and sandy areas, with the maximum speed generally controlled within 80KM. Low-speed four-wheel drive provides high torque, meaning it's more powerful, suitable for off-roading, climbing, descending steep slopes, and getting out of tough situations, but rarely used for continuous driving. When using 4L, it's best to start in 1st gear and avoid shifting to gears above 2nd, while keeping the speed not too high. Use L4 when driving slowly and H4 when driving fast. Use automatic mode when not off-roading. 2. Introduction to four-wheel drive: Four-wheel drive refers to a vehicle maintaining four-wheel drive throughout the entire driving process, with the engine's torque distributed to the front and rear wheels at a fixed ratio. This drive mode ensures good off-road and handling performance at all times, but cannot adjust torque distribution based on road conditions and has higher fuel consumption. On the other hand, real-time four-wheel drive is controlled by a computer chip to switch between two-wheel and four-wheel drive. On normal roads, the vehicle drives in two-wheel drive mode. When encountering off-road conditions or wheel slippage, the computer detects and automatically distributes power to the other two wheels. For part-time four-wheel drive mode, the quality of the control program affects the intelligence of the drive mode switching. Additionally, there is also a part-time four-wheel drive (Part-Time 4WD) that is manually controlled by the driver to switch drive modes. Many SUVs and off-road vehicles have one or several of the above four-wheel drive modes to complement each other's strengths and weaknesses.
