Patent ID: 6019091
Filing Date: 2000-02-01
Classification: F02M

Abstract:
A pump for a fuel injection system, the pump comprising:a pump body having a pumping chamber, a fuel inlet for supplying fuel to the pumping chamber, an outlet port, and a control valve chamber between the pumping chamber and the outlet port;a plunger disposed in the pumping chamber;an actuatable control valve disposed in the control valve chamber for controlling fuel, the control valve including a valve body moveable over an adjustable stroke range between open and closed positions, wherein the stroke range is adjustable to vary an effective open gap when the valve body is in the open position;an actuatable valve stop assembly adjacent to the control valve chamber, the valve stop assembly including a stop member that is moveable between extended and retracted positions, the stop member limiting the stroke range such that the control valve has a first effective open gap when the stop member is in the extended position, and such that the control valve has a second effective open gap when the stop member is in the retracted position;a first armature at the control valve;a first stator assembly near the first armature and including a first actuator operable to actuate the control valve;a second armature at the stop member; anda second stator near the second armature and including a second actuator operable to actuate the valve stop assembly.