Method of controlling rear wheels of a four-wheel steering motor vehicles

摘要

The rear road wheels of a four-wheel steering motor vehicle are controlled so that a steer angle ratio of a rear wheel steer angle to a front wheel steer angle is variably controlled depending on the lateral acceleration. The steer angle ratio is selected so as to be in a range defined by: f1(yo)-g(yo) xf2(yo)>/=0 where f1(yo)=Cfo/mf; f2(yo)=Cro/mr; Cfo, Cro are equivalent cornering powers of the tires of the front and rear road wheels while the motor vehicle is making a steady-state turn; and mf, mr are equivalent masses at the front and rear axles of the motor vehicle.