Internal-combustion engines – Charge forming device – With fuel pump
Patent
1985-05-24
1986-05-20
Moy, Magdalen Y. C.
Internal-combustion engines
Charge forming device
With fuel pump
F02M 5920
Patent
active
045893942
ABSTRACT:
A distributor-type fuel injection pump for an internal combustion engine, having an injection timing control device for controlling the fuel injection timing by a timer piston displaceable in response to change of the fuel pressure within a suction space of the pump filled with fuel having a pressure variable as a function of the rotational speed of the engine. The pump housing has drain passage means formed in a partition wall thereof partitioning the injection timing control device from the suction space and in the timer piston, and communicating the suction space with a zone under a lower pressure, to always drain fuel within the suction space to the lower pressure zone during the operation of the pump. Therefore, a desired fuel injection timing characteristic substantially free of a hysteresis can be obtained within a predetermined rotational speed region of the engine.
REFERENCES:
patent: 3101078 (1963-08-01), Evans
patent: 3147746 (1964-09-01), Hofer
patent: 3439624 (1969-04-01), Glikin et al.
patent: 4353343 (1982-10-01), Trachte
patent: 4368709 (1983-01-01), Yasuhara
patent: 4502449 (1985-03-01), Laufer
Diesel Kiki Co. Ltd.
Moy Magdalen Y. C.
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