Hydraulic system for power steering and gear shifting of motor vehicles

Claim 1

A HYRAULIC SYSTEM FOR A MOTOR VEHICLE HAVING AN ENGINE, CHANGE-SPEED GEAR MEANS, SHIFTING MEANS FOR SAID CHANGE-SPEED GEAR MEANS, AND POWER STEERING MEANS, SAID MOTOR VEHICLE BEING PROVIDED WITH MEANS FOR CONTROLLING THE TRAVEL OF THE VEHICLE INCLUDING THROTTLE CONTROL MEANS FOR SAID POWER STEERING MEANS AND FURTHER THROTTLE CONTROL MEANS FOR OPERATING SAID SHIFTING MEANS FOR SAID CHANGE-SPEED GEAR MEANS, SAID SYSTEM COMPRISING FLUID CIRCUIT MEANS INCLUDING A HIGH-PRESSURE PUMP AND A FLUID RESERVOIR, SAID HIGH PRESSURE PUMP HAVING A CAPACITY LESS THAN THE COMBINED PEAK LOAD REQUIREMENTS FOR OPERATING SAID SHIFTING MEANS AND FOR OPERATING SAID POWER STEERING MEANS, BUT GREATER AND FOR OPERATING SAID POWER STEERING MEANS TAKEN SINGLY, SAID FIRST-NAMED THROTTLE CONTROL MEANS AND SAID FURTHER THROTTLE CONTROL MEANS BEING CONNECTED IN SERIES WITH SAID HIGH-PRESSURE PUMP, SAID FURTHER THROTTLE CONTROL MEANS BEING DISPOSED DOWNSTREAM FROM SAID FIRST-NAMED THROTTLE CONTROL MEANS IN SAID FLUID CIRCUIT MEANS, AND MEANS FOR LIMITING THE DELIVERY OUTPUT OF SAID HIGH-PRESSURE PUMP INCLUDING BY-PASS MEANS DISPOSED IN SAID FLUID CIRCUIT MEANS UPSTREAM FROM SAID FIRST-NAMED THROTTLE CONTROL MEANS BETWEEN SAID FIRSTNAMED THROTTLE CONTROL MEANS AND SAID HIGH-PRESSURE PUMP.