Full hydraulic power steering system for vehicles, has steering input coupled to directional valve feeding actuator coupled to steering output

摘要

The power steering system has the output (P) of a hydraulic pump fed to a directional flow control valve (8) that applies a differential force to a steering actuator (10) dependent upon the steering wheel (3) position. The fluid is fed through a pair of pressure limiting valves (12). In the event that the pressure falls a metering motor (15) acts as a back up pump to maintain conditions.