Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1997-01-28
1998-02-10
Kamen, Noah P.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
123198DB, 73 491, 73119A, F02B 7700
Patent
active
057157863
ABSTRACT:
A device for detecting leakage in a fuel supply system of an internal combustion engine in which fuel is pumped from a fuel container under pressure by at least one pump and reaches injection valves over corresponding lines, the device has a control unit, a plurality of operating condition detecting sensors detecting operating conditions of the internal combustion engine and sending signals to the control unit, a return line with a valve formed so that excess fuel is returnable to the fuel container, the valve being connected with the control unit so that when the control unit detects a predetermined operating state of the engine from the signals of the operating condition sensors, the control unit closes the valve, and a pressure sensor, and a pressure sensor operative for measuring a fuel pressure when the valve is closed and connected to the control unit so that the pressure sensor supplies to the control unit a signal corresponding to the measured pressure, and the control unit compares the signal corresponding to the measured fuel pressure with a signal corresponding to a fuel pressure to be expected to indicate a leak when a deviation between the measured fuel pressure and the fuel pressure to be expected occurs.
REFERENCES:
patent: 4269061 (1981-05-01), Hatsuno et al.
patent: 5616837 (1997-04-01), Leonard et al.
Kamen Noah P.
Robert & Bosch GmbH
Striker Michael J.
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