Improvement to a power-assisted steering system for the steerable wheels of one or more rear axles of a vehicle such as a truck or semitrailer

摘要

In a power-steering system for steering the wheels of one or more rear axles of a truck or semitrailer, a hydraulic actuator (89) acts on the rear steerable wheels (38,39) and is connected to a hydraulic-pressure source (143) or to the vehicle pneumatic circuit. The angle of the kingpin or of the frontwheels (1,2) is transmitted hydraulically from jack (29) to jack (37) or mechanically through levers and cables (120-124) to distribution unit (88). <IMAGE>