Wheel alignment angles (Peugeot 406)

Adjusting the wheel by loosening and turning the inner pivot bolt

Wheel alignment angles have a significant impact on vehicle stability, tire wear, and fuel consumption. The following wheel alignment angles are distinguished.

Collapse

Camber is the tilt of the wheel in a vertical plane relative to the centerline of the car. It can be positive if the wheels are tilted outward, or negative if the wheels are tilted inward. The camber angle mainly affects the uniformity of wear on the front tires. If one wheel has positive camber and the other has negative camber, the car will pull to one side when driving straight.

Convergence

Toe-in is the lateral distance between the wheels. Positive toe-in means the front wheels are closer together than the rear wheels, measured at the height of the wheel's midpoint. Negative toe-in means the front wheels are further apart than the rear wheels.

Source available here: peugeotbook.ru

Transverse tilt of the pivot axis

The transverse inclination of the steering axis of the wheel is the angle between the inclination axis of the steering knuckle and the vertical drawn through the wheel mounting point, looking in the longitudinal direction of the vehicle.



Due to the camber angles and the transverse tilt of the steering axis, the points of contact of the wheels with the road are located closer to the axis of the steering knuckle. This maintains the so-called "rolling shoulder". The smaller the "rolling shoulder", the easier the car is to control. Also, impacts from uneven surfaces are less transmitted to the steering.

Angle of longitudinal inclination of the axis of rotation

Angle of longitudinal tilt of the turning axis - the axis relative to which the wheel turns is placed in space so that its lower part is tilted forward. Such an angle of longitudinal tilt is called positive. With a positive value of the angle, the self-return of the wheel to the middle position after turning is improved.

Checking and adjusting the wheel alignment angles must be done at a maintenance station due to the complexity of the equipment used.

Conditions for checking wheel alignment angles:

• the tire pressure must be correct;
• the car must be parked on a flat horizontal surface;
• the car must be empty, with the fuel tank half full;
• before checking the wheel alignment angles, rock the car body;
• the steering must be in good working order and properly adjusted;
• there should be no play in the steering rods;
• there should be no play in the wheel suspension.