Solenoid controlled variable pressure injector

Patent · Tue Mar 10 04:00:00 EST 1992

OSTI ID:5277729

Gustafson, R J

This patent describes a unit fuel injector adapted to receive fuel from a fuel supply at relatively low pressure and adapted to inject fuel at relatively high pressure into the combustion chamber of an internal combustion engine. It comprises an injector body containing a first internal bore and an injector orifice; a plunger mounted for reciprocating movement within the first internal bore to define a variable volume fuel pressurization chamber into which fuel is received at low pressure from the fuel supply and from which fuel is discharged periodically at relatively high pressure for injection through the injector orifice into the combustion chamber; and injection pressure control means for causing fuel to be injected through the injector orifice at a pressure level which is dependent on variation in the level of pressure of the fuel received from the fuel supply and which is independent of changes in the velocity of the reciprocating movement of the plunger.

• Assignee: Cummins Engine Co., Inc., Columbus, IN (United States)
• Patent Number(s): A; US 5094215
• Application Number: PPN: US 7-592275
• OSTI ID: 5277729
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330603 -- Vehicle Design Factors-- Engine System
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PRESSURE GRADIENTS
SOLENOIDS