Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1985-04-08
1987-03-10
Miller, Carl Stuart
Internal-combustion engines
Charge forming device
Fuel injection system
123506, 1374933, 417296, F02M 3900
Patent
active
046483691
ABSTRACT:
A pressure valve is proposed which is installed in the supply line which leads from a fuel injection pump to a fuel injection valve. The pressure valve has a return-feed collar provided with a throttle connection and a relief conduit is provided parallel to the return-feed collar and to the valve closing member sealing face. Via a check valve and a throttle, the relief conduit establishes the communication between the supply line toward the injection pump and the supply line toward the injection valve. By means of the combination of the return-feed collar having a throttle with a check valve acting as a pressure maintenance valve, a desired residual pressure can be established in an adapted manner in the supply line toward the injection valve, and the injection duration in particular can be adapted to the requirements of a fuel injection pump which pumps at a reduced feed rate during idling operation.
REFERENCES:
patent: 2706490 (1955-08-01), Grieshaber
patent: 3195465 (1965-07-01), Hug
patent: 3309024 (1967-03-01), Maddalozzo
patent: 3477458 (1969-11-01), Maddalozzo
patent: 3896845 (1975-07-01), Parker
patent: 3933132 (1976-01-01), Rishishita
patent: 3965876 (1976-06-01), Tissot
patent: 4467767 (1984-08-01), Kampichler
Greigg Edwin E.
Miller Carl Stuart
Robert & Bosch GmbH
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