Patent ID: 9671033
Date: 2017-06-06
CPC Classifications: F02D,F02M,F04B,F16K,Y10T

Claim:
1. A method for controlling an inlet valve actuated by a solenoid, the method comprising: providing a pump having a pump chamber, a piston reciprocally mounted in the pump chamber, the inlet valve fluidly connected to the pump chamber, energizing the solenoid to open the inlet valve in synchronism with reciprocation of the piston, thereafter de-energizing the solenoid to initiate closure of the inlet valve in synchronism with the reciprocation of the piston, and decelerating the closure of the inlet valve following de-energization of the solenoid by: connecting a resistor-capacitor network across energization terminals of the solenoid, wherein the resistor-capacitor network includes a variable resistor, and varying a value of the variable resistor as a function of a fuel pressure after an outlet of the pump and a speed of the piston of the pump.