12:21. Angles of installation of wheels
The angles of installation of forward wheels define geometry of situation of the last concerning a suspension bracket of the car and a paving. Violation of adjustment of this geometry leads to decrease in controllability of the car and increase in speed of wear of tires. The angles of installation of forward wheels of the car which are subject to control are among disorder, выбег (a corner of a longitudinal inclination of an axis of turn of a wheel) and convergence (see an illustration below).|
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Only one of parameters – convergence, and, both forward, and back wheels of the car is subject to adjustment. Sizes of disorder and a vybeg of forward wheels have to be checked on a regular basis for assessment of degree of wear of components of a suspension bracket and the steering drive.
Adjustment of angles of installation of wheels is among the procedures demanding the special accuracy of measurement which high-quality implementation requires existence of special, rather bulky and expensive equipment. Performance of this work will be most correct to be charged to professional mechanics of car service. Below, for the general understanding, definitions of each of the under control angles of installation of wheels of the car which knowledge will facilitate communication of the owner of the car with personnel of car service are given.
Convergence is called data size to each other of forward edges of wheels of the car. Such violation of parallelism of installation of wheels allows to minimize wear of a protector at the expense of a skid at commission of turns. At zero convergence the distance between forward edges of wheels is equal to distance between their rear edges. Normal convergence (X – Y) – see an illustration – usually does not exceed inch shares (1 inch = 2.54 cm). Adjustment of convergence of forward wheels is carried out by adjustment of length of steering drafts. For adjustment of convergence of back wheels it is necessary to correct position of compensation levers of a suspension bracket in the arms on the car bottom. Violation of adjustment of convergence leads to acceleration of wear of protectors of tires due to slipping them on a paving.
Disorder is called the tilt angle of the plane of wheels concerning a vertical. If wheels are inclined by the upper edges outside, disorder is called positive and vice versa. 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 protectors with the road and allows to compensate changes in suspension bracket geometry during commission of turns and at the movement of the car on an uneven paving.
Vybegom is called a deviation corner from a vertical of an axis of turn of a wheel in the plane of the last. If the axis of turn is inclined back, выбег is called positive, on the contrary.
| Characteristic |
Value |
| Forward wheels |
|
| Convergence, hail (mm) |
|
| Honda Civic |
– 0.08÷0.24 (-1.0÷3.0) |
| Acura Integra |
– 0.16÷0.16 (-2.0÷2.0) |
| Disorder, hail |
|
| Honda Civic |
0±1 |
| Acura Integra R |
– 1.5÷1.0 |
| Acura Integra (except R) | – 1.17÷0.83 |
| Longitudinal inclination of an axis of turn of wheels, hail | |
| Honda Civic |
0.67 – 2.67 |
| Acura Integra |
0.17 – 2.17 |
| Angle of rotation of a wheel, internal to turn, hail | |
| Honda Civic |
39.50 |
| Acura Integra |
36.0 |
| Angle of rotation of a wheel, external to turn, hail | |
| Honda Civic |
33.10 |
| Acura Integra |
30.5 |
| Back wheels | |
| Convergence, mm | 0.08÷0.32 (1.0÷4.0) |
| Disorder, hail |
– 1±1 |