Automotive high pressure pump solenoid valve with limp home calibration

A method of ensuring a limp home operation of a vehicle having direct injection, high pressure pump with a solenoid valve for controlling flow rate of fuel through the pump, the method comprising:

• providing a solenoid valve associated with an inlet of a direct injection, high pressure pump, the valve comprising:
• a valve body defining an inlet opening and an outlet opening in communication with the inlet opening, the valve body including a valve seat at a distal end thereof,
• a valve member at least partially disposed in the valve body, the valve member having a sealing surface associated with the valve seat,
• a movable armature coupled with the valve member such that movement of the armature moves the valve member between a closed position with the sealing surface engaging the valve seat to prevent fuel from passing through the outlet opening, and an open position with at least a portion of the valve member moving outwardly from the distal end of valve body with the sealing surface being disengaged from the valve seat to permit fuel to pass through the outlet opening,
• a stator associated with the armature,
• an electromagnetic coil associated with the stator and armature for causing movement of the armature towards the stator, and
• a spring constructed and arranged to bias the armature and thus the valve member to the closed position,
• preventing the valve member from moving to the open position when a first, normal hydrostatic force is applied to the valve seat unless the coil is energized, and
• permitting the valve member to move to the open position when a second, overpressure hydrostatic force is applied to the valve seat in the event that the solenoid valve does not operate properly so that fuel can be provided to the pump for limp home operation of the automobile.