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12.5.1. The angles of installation of wheels of the car - the general information

The angles of installation of wheels of the car - the general information

The angles of installation of wheels considerably influence stability of the car, wear of tires and fuel consumption. Nominal rates of corners are specified in Specifications.

Disorder is called the wheel plane tilt angle concerning a vertical. If wheels are inclined by the upper edges outside, disorder is called positive. The size of disorder is measured in degrees. Correctness of adjustment of disorder determines the size and the provision of a spot of contact of a protector with a paving and allows to compensate the changes in suspension bracket geometry happening during commission of turns and at the movement of the car on an uneven paving.

Disorder of forward wheels

Convergence (convergence) is called data size to each other of forward edges of wheels of the car (= B-A). Such violation of parallelism of installation of wheels allows to minimize wear of a protector due to prevention of a skid at commission of turns. Violation of adjustment of convergence leads to acceleration of wear of protectors of tires due to slipping them on a paving.

Convergence of forward wheels

Vybegom is called a corner of a longitudinal inclination of an axis of turn of a wheel, i.e. a corner of a deviation of this axis from a vertical in the rim plane. If the axis of turn is inclined back, выбег is called positive and vice versa.

Выбег forward wheels

Corner of a cross inclination of an axis of turn of a wheel - a corner of a deviation of this axis from a vertical if to look at a wheel in front of or behind the car. If the axis of turn is inclined inside, this corner is considered positive.

Corner of a cross inclination of an axis of turn of a forward wheel

The size of limit angles of rotation of forward wheels of the car has to be reduced at increase in the size of the last.

Limit angles of rotation of forward wheels