Pump device wherein detection of failure of one of pumps causes a change in the manner of control of the pump or pumps to compensate for the failure

摘要

A pump device including a plurality of pumps having respective different operating characteristics, and a pump control device for controlling the plurality of pumps, wherein the pump control device includes a control changing portion operable in response to detection of a failure of at least one of the pumps, for changing a manner of controlling at least one of the other of the pumps such that at least a portion of the operating characteristic of each defective pump is compensated for by the changed manner of controlling each normal pump. The pump device may be used in a hydraulic pressure control system as used for a hydraulically operated braking system for an automotive vehicle.