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Title: Fuel injection pump for internal combustion engines

A fuel injection pump is described for an internal combustion engine having fuel injection nozzles, comprising: a plunger disposed to be rotated and reciprocated; cam means having a camming surface operatively coupled with the plunger and disposed to be rotatively driven for causing rotation and reciprocation of the plunger to cause same to pressurize drawn fuel and distribute the pressurized fuel, to thereby deliver the pressurized fuel to the engine; the camming surface of the cam means having such a configuration as to include a first angular region for causing the plunger to be lifted for pressurizing drawn fuel during idling of the engine at a first, substantially constant velocity. It has a second angular region subsequent to the first angular region for causing the plunger to be lifted for pressurizing drawn fuel at a second velocity higher than the first velocity; a plurality of delivery valves each disposed such that fuel pressurized by the plunger is supplied to the engine through the delivery valve; and injection pipes connected, respectively, to the delivery valves to feed pressurized fuel discharged from the respective delivery valves; the delivery valves each being adapted to maintain a residual pressure within a corresponding one ofmore » the injection pipes at a value that enables to attain injection initiation pressure within an extent of rotation of the cam means corresponding to the first angular region.« less
Authors:
; ;
Publication Date:
OSTI Identifier:
6652736
Report Number(s):
US 4652221
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 14 May 1986
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; FUEL INJECTION SYSTEMS; AUTOMOTIVE FUELS; INCIDENCE ANGLE; NOZZLES; PIPES; PRESSURIZING; PUMPS; ROTATION; VALVES; VELOCITY; CONTROL EQUIPMENT; ENGINES; EQUIPMENT; FLOW REGULATORS; FUEL SYSTEMS; FUELS; HEAT ENGINES; MOTION 330100* -- Internal Combustion Engines