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C1Difficulty 3/5

In a worm-gear steering system, how does the steering wheel return to its rest position (straight-ahead line)?

Correct answer

Through the combined action of the castor and kingpin inclination angles.

Through steering geometry, particularly caster and steering-axis inclination, which encourage wheels to return to straight-ahead travel. The worm gear transmits steering-wheel movement and can work with different mechanisms, rather than only a roller. Wheel-balancing weights do not perform this function.

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  • Due to the counterweights fitted to the steered wheels.

  • Due to the springs located inside the steering box.

  • Through the combined action of the castor and kingpin inclination angles.

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