Electromagnetic unit fuel injector with piston assist solenoid actuated control valve

Patent · Mon Nov 04 23:00:00 EST 1985

OSTI ID:5899588

Teerman, R F; Bosch, R H; Wirth, R C

An electromagnetic unit fuel injector includes a pump assembly having an external actuated plunger reciprocable in a bushing with flow therefrom during a pump stroke being directed to a fuel injection nozzle of the assembly. Fuel flow from the pump can also flow through a passage means, containing a normally open, substantially pressure-balanced control valve actuated by a solenoid assembly in the valve closing direction to block drain flow during a pump stroke, as desired. A piston, actuated by discharge fuel pressure is operatively connected to the control valve to assist the solenoid in holding the control valve in a closed position.

• Assignee: General Motors Corp.
• Patent Number(s): US 4550875
• OSTI ID: 5899588
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
330603 -- Vehicle Design Factors-- Engine System
CONTROL EQUIPMENT
DESIGN
DIESEL ENGINES
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC FIELDS
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
HYDRAULICS
INTERNAL COMBUSTION ENGINES
MECHANICS
OPERATION
PISTONS
PRESSURE DEPENDENCE
PUMPS
SOLENOIDS
VALVES