What is a part-time four-wheel drive system?

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 four-wheel drive is generally divided into three gears, namely, two-wheel drive, 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 gravel roads or rainy and snowy weather, and low-speed four-wheel drive (4L) is suitable for off-road climbing and other extricating environments.

Part-time four-wheel drive is the most widely used form of four-wheel drive in pickup trucks in China. Whether it is classic pickup truck models such as Jiangling Baodian and Great Wall Feng Jun 5, or the latest pickup truck models such as SAIC Datong T60, Zhengzhou Nissan Navarra and 20 18 Jiangxi Isuzu D-MAX, the part-time four-wheel drive system is adopted. For pickup truck users, part-time four-wheel drive has obvious advantages, such as simple structure, high reliability, good off-road ability and low price. Although it is complicated for a novice to switch manually, the driver can choose the driving mode according to the actual situation, which is economical and practical when he wants to save fuel.

Do you really understand four-wheel drive? Detailed explanation of mainstream four-wheel drive system of pickup truck

Timely four-wheel drive

Advantages: simple structure, light weight and high transmission efficiency.

Disadvantages: the extreme off-road ability is slightly inferior.

Representative model: brand-new Jiangling domain tiger

Just-in-time four-wheel drive is also called real-time four-wheel drive As the name implies, it will only be converted into four-wheel drive at an appropriate time, and it will be two-wheel drive in other cases. Contrary to the manual operation of part-time four-wheel drive, the system is controlled by a computer chip. When the vehicle is driving on a flat road, it will switch to two-wheel drive, which is conducive to reducing fuel consumption. When the road bumps, inclines and bends, the vehicle will automatically switch to the four-wheel drive mode. However, the timely four-wheel drive is not suitable for difficult off-road sections because of its low physical structure limit when dealing with bad roads.