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Title: Distributor-type fuel injection pump with preliminary injection control device

A distributor-type fuel injection pump is described for an internal combustion engine having at least one cylinder, the fuel injection pump comprising: (a) a housing having a fuel chamber defined therein; (b) fuel supply means for supplying fuel to the fuel chamber under pressure dependent upon engine r.p.m.; (c) a barrel mounted within the housing and having a distribution hole communicating with the engine cylinder; (d) a plunger mounted within the barrel for axial and rotary motion therein and defining jointly with the barrel a pump working chamber communicating with the fuel chamber. The plunger has a main discharge port communicating at one end with the pump working chamber and alignable with the distribution hole for effecting a main fuel injection, and a preliminary discharge port communicating with the pump working chamber and alignable with the distribution hole before the alignment of the main discharge port with the distribution hole, thereby effecting a preliminary fuel injection before the main injection; and (e) means operatively connected with the plunger and actuatable in response to pressure within the fuel chamber, for controlling fuel injection timing. The control means includes a first means, actuatable in response to the pressure within the fuel chamber,more » for effecting the preliminary fuel injection when the pressure within the fuel chamber is at less than a predetermined value, and a second means, actuatable in response to the pressure within the fuel chamber, for preventing the preliminary fuel injection when the pressure within the fuel chamber is above the predetermined value.« less
Authors:
;
Publication Date:
OSTI Identifier:
6885419
Report Number(s):
US 4635599
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 13 Jun 1985
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; CONTROL SYSTEMS; FUEL INJECTION SYSTEMS; ALIGNMENT; CYLINDERS; PRESSURE DEPENDENCE; PRESSURE EFFECTS; PUMPS; ROTATION; TIMING CIRCUITS; ELECTRONIC CIRCUITS; ENGINES; FUEL SYSTEMS; HEAT ENGINES; MOTION 330100* -- Internal Combustion Engines