How to use the part-time 4wd gear?

2H: It means that the vehicle is driving normally with rear drive. There is no speed limit in this mode, but it cannot exceed 120km/h, otherwise the fuel consumption will increase.

"2H" is the most fuel-efficient mode of all modes. If this driving mode is still used in rainy days, due to the formation of water film on the road surface, the tire grip will decrease, and the car body will swing and feel floating.

4H: It means four-wheel drive. If driving changes to four-wheel drive mode in rainy days, the car is in stable condition and has excellent handling. When the car is in "4H" mode, it is important to control the speed within100 km/h.

"4HLC": stands for low-speed four-wheel drive. Car owners need to switch to this mode when driving on icy roads, which will inevitably bring excellent grip and good handling effect. The speed corresponding to "4HLC" should be controlled within 40 km/h.

4L: stands for ultra-low speed four-wheel drive. This model is used in extremely harsh environments, such as swamps and deserts.

Part-time four-wheel drive is the earliest four-wheel drive system, and the driver can choose two-wheel drive or four-wheel drive mode by opening or closing the transfer box. On pickup trucks, part-time 4wd is generally divided into three gears: 2H, 4H and 4L.

That is to say, two-wheel drive often has three forms: high-speed four-wheel drive and low-speed four-wheel drive-two-wheel drive mode (2H) is suitable for driving on urban roads or paved roads, high-speed four-wheel drive (4H) is suitable for use on gravel roads or rainy and snowy weather, and low-speed four-wheel drive (4L) is suitable for use in off-road climbing and other extricating environments.

Four-wheel drive vehicles, especially ordinary four-wheel drive vehicles, have excellent driving performance. The specific advantages are as follows:

1, improving passability: Because all four wheels of a four-wheel drive vehicle transmit power, the vehicle obtains twice the driving force as that of a two-wheel drive vehicle. The front and rear wheels support each other, which greatly improves the trafficability of wet, snowy and uneven roads.

2. Improve climbing ability: Similarly, four-wheel drive vehicles can climb steep slopes that two-wheel drive vehicles cannot climb.

3. Excellent cornering performance: the adhesion of tires is closely related to the power transmitted to the road surface. With the increase of power, the cornering force of tire tends to decrease. The power is reduced, the steering force is increased, and the performance of wet road surface and lane change is improved.

4. Excellent starting and accelerating performance: In a four-wheel drive vehicle, the engine power is transmitted to all four wheels evenly, and the adhesion of all four wheels can be effectively utilized. Therefore, even if the accelerator pedal is suddenly stepped to the bottom, the wheels will not idle, thus improving the starting and acceleration performance of the vehicle.

5. Stability of straight driving: With the increase of the residual adhesion of each wheel, the ability of the wheel to resist external disturbance is enhanced. Therefore, the constant four-wheel drive shows superior directional stability.

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