Fuel injection delivery valve with reverse flow venting

Patent · Tue May 07 04:00:00 EDT 1991

OSTI ID:5128076

Long, D L; Mitchell, M A; Sczomak, D P

This patent describes improvement in a fuel injection pump including high pressure pumping means and separate discharge fittings for supplying fuel from a source of liquified fuel to the combustion chambers of an internal combustion engine through fuel injector nozzles connected to fuel injection lines into which high pressure pulses of fuel are delivered from the high pressure pumping means through the fittings. The improvement comprises: delivery valve assembly means operatively mounted in each of the fittings for feeding pulses of fuel into the fuel injector lines and for retracting fuel from the fuel injector lines, each of the delivery valve assembly means including a valve element operatively mounted for shifting movement in an associated fitting, an inlet passage in the fitting for receiving pulses of high pressure fuel from the high pressure pumping means, the delivery valve element having hydraulic passage means therein which hydraulically feeds the pulses to an associated high pressure line for delivery to its injector nozzle for subsequent feed into the associated combustion chamber, the valve assembly means having fluid passage means therein so that pressure waves of fuel reflecting from the fuel injector nozzle will be routed by the valve element to a low pressure area in the pump to eliminate secondary fuel injections.

• Assignee: General Motors Corp., Detroit, MI (USA)
• Patent Number(s): A; US 5012785
• Application Number: PPN: US 7-372596
• OSTI ID: 5128076
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL FEEDING SYSTEMS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PUMPS
VALVES