Fuel injection for diesel engines having controlled-rate pressur

Details Fuel injection for diesel engines having controlled-rate pressur Fuel injection for diesel engines having controlled-rate pressur

1976-01-15

1978-07-11

Croyle, Carlton R.

Pumps

Expansible chamber type

Pumping member position controlled port

2395337, 137538, 417569, F04B 3910, B05B 130

Patent

active

040998940

ABSTRACT:
A piston-type injection pump for supplying a nozzle-type injector in a diesel engine is provided with integral facilities for effecting the controlled expansion of the discharge conduit between the pump and the injector and with additional facilities for limiting the rate of pressure drop in the discharge conduit during the volume expansion step. A cylindrical member disposed in a chamber that is in fluid communication with the working chamber defined by the piston-cylinder portion of the pump slidably receives an elongated cylindrical valve that is normally biased into a flow-blocking condition. Such cylindrical member has associated therewith suitable relief elements, such as a separate relief valve carried axially therein, to permit expansion of the space above the cylindrical member and to thereby accommodate an expansion of fluid downstream of the pump at the conclusion of the pressure stroke of the piston. The pressure drop limitation in the discharge conduit is effected by the combination of the relief means and a separate reduced-area located at a selected point in the pump body between the fuel supply inlet port of the cylinder and the discharge end of the pump.

REFERENCES:
patent: 1933454 (1933-10-01), Sidney
patent: 2033839 (1936-03-01), Lawson
patent: 2090688 (1937-08-01), Lindberg
patent: 2665167 (1954-01-01), High
patent: 2922581 (1960-01-01), Garday
patent: 3332408 (1967-07-01), Scott et al.
patent: 3340860 (1967-09-01), Groschel et al.
patent: 3773440 (1973-11-01), Tateishi

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