Patent ID: 8469007
Filing Date: 2013-06-25
Classification: F02D,F02M

Abstract:
1. A high pressure fuel supply pump for supplying high pressure fuel to a fuel injection valve of an internal combustion engine, comprising: a suction port located at an entrance of a pressurizing chamber; a rod magnetically driven by conducting current through an electromagnetic coil; a suction valve for opening/closing a valve seat, the suction valve being located at the pressurizing chamber side of said suction port; a controller receiving input from various sensors and controlling suction valve opening and closing; and a spring for biasing said suction valve in an opening direction or a closing direction, wherein said rod is arranged to maintain said suction valve in an open condition or a closed condition while current conduction occurs through said electromagnetic coil and to move said suction valve in a direction away from said open condition or said closed condition after stopping current conduction through said electromagnetic coil, said rod or said suction valve is configured such that an operation stroke thereof is restricted by a stopper provided at an end of the operation stroke, and said suction valve is maintained in the open condition when the controller estimates based on the input received that a closing timing of the fuel injection valve and actuation a closing timing of the suction valve will occur simultaneously.