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3) Caster
The angle between the vertical line and king pin, which fixes the steering knuckle and front axle,
(steering column which connects the top and bottom ball joints in the independent axle type)
when viewed the tires from the side.
Caster
Caster:
With considering the height difference between the wheel centers of the front and
rear wheels. (Under standard condition that the vehicle is on a level ground)
Positive caster:
-
Advantages:
Directional force to go straight (following control)
-
Restoring force of the wheel (restored to the straight ahead direction)
-
Prevention of wheel shimmy (wheels wobble left and right)
Negative caster:
-
Smaller turning radius
Advantages:
-
Disadvantages:
-
Top of the king pin is tilted backward from the vertical line of the wheel
center when viewed the tires from the side
Top of the king pin is tilted forward from the vertical line of the wheel center
when viewed the tires from the side
Impact from the road is transferred to the steering wheel (steering wheel
turns)
Poor straightness
4411-01
LH
RH
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