PRESSURE ACCUMULATOR DEVICE FOR A MOTOR VEHICLE FUEL INJECTION SYSTEM AND METHOD FOR OPERATING A PRESSURE ACCUMULATOR DEVICE OF SAID TYPE

摘要

The invention relates to a pressure accumulator device and to a method for operating a pressure accumulator device for a fluid in particular for a motor vehicle fuel injection system in which method a fluid is supplied at high pressure to a pressure accumulator (1) by means of a feed device (6 7 8 9) in which method fluid is extracted from the pressure accumulator (1) by means of at least one extraction device (2 3 4 5) and in which method a controllable pressure dissipation valve (10) is used for the extraction of fluid from the pressure accumulator with the aim of pressure control wherein the pressure in the pressure accumulator is regulated to a target pressure wherein the pressure dissipation valve automatically opens in the event of a predefined threshold pressure in the pressure accumulator (1) being exceeded and wherein to inspect the pressure regulation of the pressure accumulator the threshold pressure of the pressure dissipation valve increased and the subsequent change in fluid pressure in the pressure accumulator (1) over time is detected. Fault discrimination can be performed by way of the analysis of the change in the fluid pressure in the pressure accumulator with respect to time.