Steering system for vehicles

Claim 1

A steering system for a vehicle having a steerable front wheel and a steerable rear wheel, comprising: a front wheel steering mechanism for steering said front wheel; a rear wheel steering mechanism for steering said rear wheel in accordance with a travelling state quantity substantially influenced by a disturbance; and said rear wheel steering mechanism including: actuating means for actuating said rear wheels; first detection means for detecting said travelling state quantity; second detection means for detecting a vehicle's speed of said vehicle; control means connecting to said first and second detection means and adapted to provide a control signal for said actuating means; said control means having an operation process means for determining a provisional steering quantity of said rear wheel depending on an output signal of said first detection means through a predetermined expression of function, a correction factor corresponding to said vehicle speed from an output signal of said second detection means, and a final steering quantity of said rear wheel based on said predetermined expression of function and said correction factor, and for producing said control signal representing said final steering quantity; and said correction factor decreases as said vehicle speed decreases.