.
1 four-wheel drive
Introduction
four-wheel drive (PART-TIME 4WD) mdash; mdash; a driver may be two manually select the four-wheel drive and four-wheel drive between the driver according to the road conditions, by turning on or off the splitter be varied two-wheel drive or four wheel drive mode, or four-wheel drive off-road vehicles which is the most common SUV the drive mode.
four-wheel drive by the operation of the splitter to achieve a four-wheel drive with two drive switching. Its advantage is simple structure, high stability, strong and durable, but the disadvantage is that the owners manual operation, and some complex structure, not just a step, but also need to stop operating, so that not only operate more trouble, but due to bad road conditions can not respond quickly, often miss the best time turning around; and second, because there is no central differential four-wheel drive, four-wheel drive system can not be used on a hard surface (paved road), you can not turn smoothly, especially in the corners .
In general, the vehicle is in four-wheel drive state is not the time, under normal driving conditions, is used in two-wheel drive, when required by the bad road, the driver can be driven by two points lever switched to four-wheel drive, four wheels are provided so that the driving force, thereby improving the performance of the vehicle through.
Operation mode: the vehicle will be specifically designed transfer means, some lever of the transfer case, some electronic buttons or knobs.
Representative vehicle: JEEP Wrangler, such as the Great Wall Hover.
four-wheel drive by the operation of the splitter to achieve a four-wheel drive with two drive switching. Since there is no center differential in the transfer device, so time four-wheel drive four-wheel drive vehicle can not be used on hard ground, not turning smoothly, especially in the corners. This is because the four-wheel drive is not in the center differential splitter, the rotation speed can not be adjusted due to the longitudinal axis. When steering, the turning radius of the front wheel larger than rear wheel on the same side, so that the rotational speed of the front wheels thanRear wheel speed, as well as four wheels to go a completely different route, so the four-wheel drive four-wheel drive can only be put in when wheel slippage, a return to high friction of paved road should be immediately changed back to two drives.