Wheel convergence. Compared to many other vehicles in this model, the front wheels are slightly further apart at rest at the front than at the rear. This is called negative wheel alignment. The force of friction between the wheel and the road tends to move the left wheel to the left and the right wheel to the right. The drive of the front wheels, on the contrary, tends to bring these wheels closer together. When driving on a curved track, the negative convergence is enhanced due to the trapezoidal tie rod system. A wheel inside a curved track turns more around than a wheel outside the curve. This is also necessary, because on a curved section, the inner wheels must pass through a smaller radius compared to the outer wheels.
Camber is the position of the front wheels when viewed from the front. For the described models of cars, the wheels have a greater distance from each other at the top, in the wheel arch, than at the bottom, at the base..This is positive camber, or camber in technical terms.
Kingpin transverse tilt - This is a slight tilt of the axis of rotation of the wheel. Both oscillating axles have a smaller distance from each other at the top than at the bottom. Camber and kingpin lateral inclination additionally prevent wheel vibration. In addition, they make it easier to turn the wheels to their original position. By this is meant the desire of the front wheels to move independently figuratively to a straight position after passing a curved trajectory.
Longitudinal inclination of the kingpin of the steered wheels - this is the inclined position of the axis of rotation of the wheel in the longitudinal direction. This also helps to stabilize the rectilinear movement and prevents vibration of the front wheels.
The illustrations are given for a better visual representation of the concepts being explained: 1 - convergence of wheels; 2 - camber; 3 - transverse tilt of the kingpin; 4 longitudinal inclination of the king pin; 5 - perpendicular inclination of the king pin.
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