Vehicle steering returnability with maximum steering wheel angle at low speeds |
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Authors: | Y G Cho |
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Institution: | (1) Hyundai Motor Company, 772-1 Jangduk-dong, Hwaseong-si, Gyeonggi, 445-706, Korea |
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Abstract: | In this paper, an analytical model with suitable vehicle parameters, together with a multi-body model is proposed to predict
steering returnability in low-speed cornering with what is expected to be adequate precision as the steering wheel moves from
lock to lock. This model shows how the steering response can be interpreted in terms of vertical force, lateral force with
aligning moment, and longitudinal force. The simulation results show that vertical steering rack forces increase in the restoring
direction according to steering rack displacement for both the inner and outer wheels. As lateral forces due to side-slip
angle are directed toward the medial plane of the vehicle in both wheels, the outer wheel pushes the steering wheel in the
returning direction while the inner wheel does not. In order to improve steering returnability, it is possible to increase
the total steering rack force in both road wheels through adjustments to the kingpin axis and steering angle. This approach
is useful for setting up a proper suspension geometry during conceptual chassis design. |
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Keywords: | Steering returnability Kingpin axis Steering effort Wheel alignment Suspension geometry |
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