Automotive wheel alignment analysis of the meaning and Frequently Asked Question
Wheel alignment angle is present in the suspension system and the relative angle between the mechanical activity, maintaining the correct wheel alignment angle to ensure that the vehicle straight into sexual and handling, to improve the vehicle's steering and to ensure the steering system of of recovery, to avoid undue stress and damage bearings and loss of accuracy. Can ensure
Tire Close engagement with the ground, reduce tire wear and improper eating tires to ensure stability when cornering.
1. 4 localization of Vehicle suspension system including the main orientation point: outside angle (Camber), after the dip (Castor), beam angle (Toe), within the inclination (KPI), turned the first time show (Toe-outonTurn) and so on. Meaning are as follows:
1. Camber (Camber): defined as a vehicle to see the front tire into the center line and the vertical line the point of view, positive outward, inward is negative. The different perspectives can change the tire and the ground contact point and the load to a direct impact on tire grip and wear conditions. And changed the emphasis axle on the vehicle force distribution, to avoid bearing an exception
Wear and tear . In addition, the presence of camber can be used to offset
Car body After loading, suspension parts and activities of surface deformation resulting clearance angle. There will also affect the camber of the road vehicle direction, which can be used as the motorcycle body tilt to turn, the left and right wheel camber must be equal balance in power not under the shadow of straight to the car, and then with the beam angle (Toe), and enhanced the stability of straight and avoid uneven tire consumption. Increase the negative camber required to meet the increase in Toe-out; increase the positive camber Zexu with the expansion of Toe-in.
2. Within the inclination (KPI): defined as the steering shaft into the center line and the angle of the vertical line. With the inclination angle can weight evenly distributed on the bearings, bearing protection to be easily damaged, making the average power steering, steering light. Conversely, if the inclination angle is 0, then the vehicle weight and ground reaction forces in the axle transverse shear stress have a great, easy to axle damage, steering will become extremely heavy. In addition, the inner front wheel steering angle is also a source of strength after the return is. Angle in the vehicle suspension design in the beginning had already set a good, usually can not be adjusted. car-m.cn
3. Beam angle (Toe): defined as the top of the left and right looking into the tire angle inward for the Toe-in, out for the Toe-out. Function of beam angle to compensate for the tire and road surface resistance due to camber caused by the inward or outward rolling of the trend, to ensure the car straight into the sex. Toe-in will cause understeer, Toe-out will be the trend of increasing oversteer.
4. After the angle (Caster): is defined as a vehicle side view steering shaft into the center line and the angle between the vertical line, moving as a negative, backward is positive. There can, after turning angle of the intersection of the road axis and then place the front tires can be used to road to face the resistance of the tire so the car straight, its principles as the front-wheel shopping cart will automatically go to your force on and maintain a straight direction of the general. After the greater inclination of the car straight as possible, after turning back of the steering wheel the better, but will shift to become heavy. General inclination about the car after 1 to 2 degrees.
5. Turn pm Exhibition (Toe-outonTurn): defined as the turning point when the difference between the two front wheel steering. Round the bend when cornering in the angle of turn is usually greater than the outer curve, a difference of 2 degrees, which is aimed at cornering so that the car can extend the line after the instantaneous center axis of a circle and poor cornering. In addition, when the bending angle of rotation within the larger, have greater resistance, the resistance of different cars can tend to drag the party most likely to turn (imagine turning tank mode).
6.Off-set: Off-set of joints is defined as the wheels (MountingSurface) and the wheel center (CenterofRim) distance to the outer direction is positive (PositiveOffset), to the inner rim is negative (NegativeOffset). Offset will be changed to change the wheels of the car's wheelbase, while the wheelbase is the distance between the centerline of the tire, so if the increase is simple wheels and tires without changing the Off-set, no influence on the tread.
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