Vehicle and a method of reducing sound produced by a liquid fluid pump

A vehicle comprising:

• a liquid fluid pump including a control valve, with the control valve including a solenoid,
• wherein the pump includes a housing defining an aperture such that the housing presents an inner wall adjacent to the aperture, and the pump includes a movable member disposed in the aperture;
• wherein the inner wall defines a recess disposed adjacent to the aperture;
• wherein the pump includes a biasing member disposed in the recess;
• wherein the movable member includes a slide extending outwardly toward the inner wall such that the slide is at least partially disposed in the recess, and the slide is movable in the recess;
• wherein the biasing member continuously biases the slide in a direction;
• wherein the pump contains a gaseous fluid when in a first phase of the pump and a liquid fluid when in a second phase of the pump;
• and
• a controller in communication with the pump, with the controller including a processor and tangible, non-transitory memory on which is recorded instructions for reducing sound produced by the pump, wherein the controller is configured to execute the instructions from the memory, via the processor, to thereby:
• detect a predetermined event;
• activate the pump when the predetermined event is detected;
• operate the control valve of the pump in one of an initial operating mode and a standard operating mode when the pump is activated, with the control valve operable to allow the gaseous fluid to vent out of the pump when in the initial operating mode corresponding to the pump being in the first phase, and with the control valve operable to allow the liquid fluid to move through the pump when in the standard operating mode corresponding to the pump being in the second phase;
• and
• energize and de-energize, at a calibrated frequency, the solenoid of the control valve in a sequence when in the initial operating mode to reduce sound produced by the pump during the initial operating mode;
• wherein the control valve includes a rod movable back and forth in response to the solenoid being energized and de-energized, at the calibrated frequency, in the sequence when in the initial operating mode;
• wherein the control valve includes a blocking member movable back and forth in response to the movement of the rod when in the initial operating mode such that the blocking member controls a rate that the gaseous fluid is vented from the pump as the solenoid is cycled on and off while in the initial operating mode;
• and
• wherein the control valve operates in the standard operating mode when the gaseous fluid has been vented from the pump in the initial operating mode.