Cut-off fuel exhaust mechanism in fuel injection pump

Patent · Tue Aug 23 00:00:00 EDT 1988

OSTI ID:6620405

Ikeuchi, H

This patent describes a fuel injection pump having an exhaust means for exhausting fuel from the fuel pump at the time of cut-off of fuel flow through the pump, comprising: a pump body for positioning in a pump space for containing fuel to be pumped, the pump body having a fuel passage extending thereinto from the pump space and a valve means in the fuel passage; a plunger barrel mounted in the pump body and having a plunger bore therein and a fuel intake port extending through the plunger barrel from a position opposite the inner end of the fuel passage into the plunger bore; a plunger rotatably and slidably mounted in the plunger bore and defining a pressurizing chamber at the inner end of the plunger bore; the plunger barrel having an oil passage extending from the end within which the pressurizing chamber is defined to the periphery of the plunger barrel; the pump body having a lead hole therethrough from a position opposite the end of the oil passage at the periphery of the plunger barrel to the outside of the pump body, and further having an oil chamber extending thereinto from a position on the pump body near the end of the oil passage and an exhaust passage extending from the inner part of the oil chamber to the outside of the pump body and opening into the pump space; a valve housing mounted on the pump body over the end of the lead hole and the opening into the oil chamber and having a valve guide hole therein opening into the oil chamber and having a valve seat around the end thereof and having an oil induction hole therethrough from a position opposite the end of the lead hole and into the valve guide hole.

• Assignee: Diesel Kiki Co., Ltd., Tokyo
• Patent Number(s): US 4765302
• OSTI ID: 6620405
• Resource Relation: Patent File Date: Filed date 6 May 1987
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
FUEL INJECTION SYSTEMS
PUMPS
INTERNAL COMBUSTION ENGINES
OUTLET STRUCTURES
DESIGN
HYDRAULICS
UNLOADING
VALVES
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
FUEL SYSTEMS
HEAT ENGINES
MECHANICAL STRUCTURES
MECHANICS
330100* - Internal Combustion Engines