| 摘要 |
PCT No. PCT/DE96/00273 Sec. 371 Date Oct. 6, 1997 Sec. 102(e) Date Oct. 6, 1997 PCT Filed Feb. 22, 1996 PCT Pub. No. WO96/31693 PCT Pub. Date Oct. 10, 1996The device for detecting leaks in a fuel supply system for an internal combustion engine includes an electronic engine control unit (23) which tests for an engine overrunning mode, closes the injection valves and shuts off the fuel pump (11) if the overrunning mode is detected. Then this control unit (23) determines a pressure gradient (gradp) of a fuel supply line pressure measured by a pressure sensor (24) or a differential pressure gradient (grad delta p) of a differential pressure between fuel supply and return lines (13,17) measured by a differential pressure sensor (25) after the injection valves (15) are closed. Then it compares the pressure gradient (gradp) or differential pressure gradient (grad delta p) with a predetermined threshold (SW) or respective upper and lower thresholds (SWo, SWu) to determine if a leak has occurred.
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