arranged in the front axle (precursor automobiles) differential and rear axle (rear-wheel drive car), respectively referred to as front differential and rear differential, such as four-wheel drive vehicle is mounted in the middle of the drive shaft on the front and rear wheels to adjust the speed, it referred to the center differential.
1. The center differential noun
arranged in the front axle (precursor automobiles) differential and rear axle (rear-wheel drive car), may be referred to as front differential and a rear differential speed, as installed on a four-wheel drive cars of the intermediate transmission shaft, front and rear wheels to adjust the speed, referred to the center differential.
The principle of the differential
2. The role of the principle of differential
first explain the role of differential. Car when cornering, the wheel made a circular arc motion, the rotational speed of the outer wheels necessarily higher speed than the inner wheel, there is a certain difference in speed, the drive wheel will cause mutual interference phenomenon. Since the left and right non-driving wheel sides are mutually independent, interfere with each other.
Principle
If the driving wheel is rigidly connected to a shaft directly, then, is bound to the same rotational speed of the wheel on both sides. So when cornering, the inner and outer sides of the wheel will be interference phenomenon will cause car turns difficult, so now the car drive axle differential are installed, allowing both sides of the axle at different rotational speed, the wheels do satisfy both sides It may not work equally with pure rolling to form, reducing tire friction with the ground.
position
arranged in the front axle (precursor automobiles) and a differential rear axle (rear-wheel drive car), respectively referred to as front differential and rear differential, the intermediate transmission shaft is mounted on four-wheel drive vehicle, to adjust the speed of the front and rear wheels, it is called the central differential.
3. The center differential type
● open center differential
● multiple disc clutch differentials
● Torsen differential
● differential viscous coupling
(1) an open center differential accelerator
As the name implies, is an open differential without any restriction, can work differential planetary gear set does not have any locking means when the vehicle is turning, if equipped with a four-wheel in front after three open differentials, so if one wheel slips, then all power will be wasted in the car on the wheels, while the remaining three wheels is not possible to power.
(2) multi-plate clutch differentials
Multi-disc clutch differentials depend on wet multi-plate clutch are differential torque. This system is often used as a center differential timely four-wheel drive system use. There are two sets of friction disks therein, a set of driving disc, a driven plate group. Driving disc connected to the front axle, the rear axle is connected with the driven disc. Two dedicated disk is immersed in the oil, and a combination of both separation systems rely on electronic control.
(3) Torsen differential
works Torsen differential
torr Mori differential (the Torsen) called the torque-sensing Traction– feel traction torque, the worm wheel core Torsen differential, a worm gear system.
The basic principle is to use unidirectional drive worm (only motion transmitted from the worm to the worm wheel, self-locking occurs and vice versa) characteristic, it is possible to adjust the longitudinal more timely and reliable than the center differential of the electrohydraulic control system torque distribution.
Briefly, a fully automated Torsen differential is purely mechanical differential, i.e. the control does not require human +100 + percentage reliable direct transmission limited slip differential, from a certain angle He said to be a very balanced design.
(4) a viscous coupling differentials
differential viscous coupling, such a configuration is today differential means for automatically dispensing smart power on all-wheel drive cars. It is generally installed on a wheel drive based all-wheel drive automobiles, according to the usual with front-wheel drive.
Working Principle
of the viscous coupling, somewhat similar to the multi-plate clutch. The input shaft is equipped with a number of inner plates, many plates are inserted into the outer housing among the output shaft, and filled with a high viscosity silicone oil. The transmission input shaft and the front of the engine is connected to transfer means, connected to the output drive shaft and the rear axle. The maximum viscosity characteristic without a driver coupling is operated, the power can be automatically assigned to the rear axle as desired.