1. Accurate front wheel alianment is essential to provide good
steering and roadholding characteristics and and to ensure slow and even
tyre wear. Before considering the steering angles, check that the tyres
are correctly inflated, that the front wheels are not buckled, the hub
bearings are not worn or incorrectly adjusted and that the steering
linkage is in good oeder, without slackness or wear at the joints.
2. Wheel alignment consists of four factors:
Camber, is the angle at which the road wheels are set from the vertical
when viewed from the front or rear of the vehicle. Positive camber is
the angle (in degrees) that the wheels are tilted outwards at the top
from the veertical.
Castor, is the angle between the steering axis and a vertical line when
viewed from each side of the vehicle. Positive castor is indicated when
the steering axis is inclined towards the rear of the vehicle at its upper
Steering axis inclination, is the angle when viewed from the front or
rear of the vehcile between vertical and an imaginary line drawn
between the upper and lower strut mountings.
Toe, is the amount by which the distance between the front inside
edges of the roadwheel rims differs from that between the rear inside
edges. If the distance between the front edges is less than that at the
rear, the wheels are said to toe-in. If the distance between the front
inside eddes is greater than that at the rear, the wheels toe-out.
3. Camber and castor are set during production. Any deviation from
specified tolerances must therefore be due to collision damage or
grossly worn suspension components.
- shamejudgeLv 710 years agoBest Answer
外傾角 (Camber) 是從車前或車後觀察輪胎設定和垂直所形成的角度。 正外傾角 (Positive camber) 是輪胎上端由垂直向外傾斜的角度 (用度數計算)
後傾角(Castor) 是從車的兩邊觀察轉向軸中心線與垂直線間的角度。 正後傾角 (Positive castor) 是當輪胎上端的轉向軸中心線向後傾斜。
內傾角或轉向軸傾斜角 (Steering axis inclination) 是從車前或車後觀察上下球接頭 (大王銷)假想中心線與垂直之間的角度。
束角 (Toe) 是前輪內前緣距離和內後緣距離在與軸同高處之差。如果前緣距離比後緣距離小，此前輪稱為前束(toe-in)，反之稱為後束 (toe-out)。