Patent ID: 6009858
Filing Date: 2000-01-04
Classification: F02M

Abstract:
A diesel fuel injector pump, comprising: a housing having a pump chamber; a piston movable in said pumping chamber to develop a pumping force; a fuel outlet passage communicating with said pumping chamber for delivering pressurized fuel to a fuel injector; a low pressure fuel inlet connected to said pumping chamber; a low pressure fuel return, injection timing means comprising a relief chamber, a control valve having a first position permitting flow from said pumping chamber to said relief chamber, and a second position allowing the entire pumping chamber output to be directed into said fuel outlet passage; a solenoid means for operating said control valve; said solenoid means comprising an armature and an armature chamber; a first accumulator passage connecting said relief chamber to said fuel return; and a second accumulator passage connecting said armature chamber to said fuel inlet.