Multi-axle heavy goods vehicle has sender cylinder piston rod with larger diameter/cross-section between 2 pistons, smaller piston surfaces in sender pressure chambers than control pressure chambers

摘要

The vehicle has at least one front axle (31,32) with steerable wheels, a rear axle (37) with driven wheels with a leading or trailing axle (40) with steerable wheels and a power steering gearbox (43). The piston rod of a sender cylinder (51) has a larger diameter/cross-section in the region between to pistons and smaller piston surfaces in the sender pressure chambers compared to those in control pressure chambers.