Basic knowledge of four-wheel alignment angle

When the vehicle has been used for a long time, the user finds that the steering direction is heavy, shaking, deviation, misalignment, deviation, or tire unilateral wear, wavy wear, block wear, eccentric wear and other abnormal wear, as well as the user’s feeling of floating, bumping, rocking and other phenomena when driving, he should consider checking the wheel alignment value to see if there are too many deviations and repair it in timely.

In normal driving, the contact between tire and ground is different due to the different suspension structure of chassis of the vehicle model. All parts installed on the frame and body and the wheel and the wheel and wheel between the wheel and the ground have corresponding angle positions, so as to facilitate the vehicle to better ride stability and safety, and reduce the wear of tire and other parts. These angles are what we have done The angle of four wheel positioning needs to be adjusted, and each angle is closely related. Only the best position can be achieved by matching each other

The basic angles of four-wheel alignment include: toe in angle, camber angle, kingpin caster angle, thrust angle, retraction angle, wheelbase, containment angle, kingpin inclination angle, steering angle, rolling radius, friction radius, body frame height, Ackerman angle, etc.

Today, I mainly explain to you the angles that we often need to adjust: toe in angle, camber angle, kingpin caster angle and thrust angle.

Toe Angle

The angle between the center line of the tire and the longitudinal axis of the car is called the toe in angle when viewed from the up and down direction of the car. The toe in angle of the front end of the tire centerline is the positive toe in angle, otherwise it is the negative toe in angle. The total toe in value is equal to the sum of the toe in values of the two wheels, that is, the angle between the axis of the two wheels