1
What is?
vehicle has four wheel drive power transmission system active is referred to as four-wheel drive.
2
advantage
· For SUV, off-road vehicles, off-road conditions can be improved through the ability. As for the car, it is mainly to improve the handling characteristics curve.
3
drawbacks
Added shaft, transfer case, differential locks and other components, will increase costs and raise the price of vehicle weight.
– Since the four wheels to be driven, the drive shaft, also increases the loss of power, and therefore fuel economy is worse than two drives.
4
Did you know?
· timely four-wheel drive system is divided into four-wheel drive, four-wheel drive and four-wheel drive three forms of time-sharing.
· now most ESP function are used instead of the four-wheel drive differential lock to complete braking the slipping wheel.
If a four-wheel drive system, before the operation must be carefully read the instructions, some operations can be carried out at parking speeds or below a certain value.
5
Category
four-wheel drive
is a four-wheel drive must be controlled by the driver in two drive and four-wheel drive system switches between four-wheel drive. The driving by the driver need to disconnect or connect the splitter purpose two drive or four-wheel drive. The advantage is not only to ensure that power and by vehicle, but also take into account fuel economy. Less than that required drivers have enough experience to judge for themselves control traffic.
timely four-wheel drive
by definition is only at the appropriate time will appear four-wheel drive system is detected by the computer chip driving needs to control the switch between two drive and four-wheel drive. It drives two driving state under normal circumstances, but when necessary it automatically changes to four-wheel drive mode. It appears not only reduces the cost of four-wheel drive vehicles, but also provides users with a good fuel economy. So most of the city-wheel-drive SUV have chosen this form. However, due to structural timely four-wheel drive is idle, most difficult to over 50 percentage driving force is transmitted to the rear axle, so has the gap on through sex compared to AWD.
AWD
full-time four-wheel drive car is traveling at any time of all the wheels all the independence movement. There are more than two full-time four-wheel drive superior driving basics: better power, traction and better driving experience safer under severe driving conditions, driving more stable. But I do not like four-wheel drive as the driving force distribution 50:50 lock.