Electronically controlled distributor type fuel injection pump for internal combustion engines

Patent · Tue Aug 12 00:00:00 EDT 1986

OSTI ID:5339637

Kobayashi, T; Nozaki, S; Yamada, K

A distributor type fuel injection pump is described for an internal combustion engine, comprising: a suction space filled with fuel under pressure variable as a function of the rotational speed of the engine; a plunger driven by the engine for concurrent reciprocating and rotative motion to effect suction of fuel from the suction space into a pump working chamber defined by the plunger at one end thereof, pressure delivery of fuel from the pump working chamber and distribution of the fuel into cylinders of the engine; suction ports formed in the plunger and identical in number with the cylinders of the engine. The suction ports with the pump working chamber; a first communication passageway communicating the suction space with the pump working chamber; a second communication passageway having a restriction therein. The second communication passageway is disposed to sequentially register with the suction ports as the plunger rotates for communicating the suction space with each of the suction ports that registers with the second communication passageway; a solenoid valve disposed to selectively open and close the first communication passageway; a selector valve operable to assume, independently of the opening and closing action of the solenoid valve, a first valve position wherein the first communication passageway is closed and simultaneously the second communication passageway is opened, at the start of the engine, and a second valve position wherein the second communication passageway is closed and simultaneously the first communication passageway is is opened, during operation of the engine other than at the start of the engine; and control means operable in response to operating conditions of the engine to control the solenoid valve to alternately open and close so as to achieve required fuel injection quantity and required injection timing.

• Assignee: Diesel Kiki Co., Ltd., Tokyo
• Patent Number(s): US 4604979
• OSTI ID: 5339637
• Resource Relation: Patent File Date: Filed date 02 Apr 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
FUEL INJECTION SYSTEMS
CONTROL SYSTEMS
INTERNAL COMBUSTION ENGINES
ANNULAR SPACE
AUTOMOTIVE FUELS
CYLINDERS
PRESSURE CONTROL
PUMPS
ROTATION
SOLENOIDS
VALVES
VELOCITY
CONFIGURATION
CONTROL
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL SYSTEMS
FUELS
HEAT ENGINES
MOTION
SPACE
330100* - Internal Combustion Engines