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PLUNGER ELECTRIC FUEL PUMP

  • US 20170298915A1
  • Filed: 03/31/2017
  • Published: 10/19/2017
  • Est. Priority Date: 04/14/2016
  • Status: Active Grant
First Claim
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1. A plunger electric fuel pump comprising:

  • a cylinder;

    a plunger configured to reciprocate inside the cylinder;

    a pump body including a compression chamber that is defined by the cylinder and the plunger such that fuel in the compression chamber is pressurized by moving the plunger inside the cylinder;

    a movable element to which the plunger is connected;

    a fixed core provided so as to face the movable element;

    a rotational core including a permanent magnet configured to move the movable element in a direction toward the pump body by applying a magnetic force to the movable element;

    an electric motor configured to rotate the rotational core; and

    a spring configured to urge the movable element in a direction away from the pump body, whereinthe rotational core and the fixed core are provided with a switching portion configured to switch between a first state and a second state when a rotational phase of the rotational core is changed, the first state being a state where the magnetic force of the permanent magnet is not applied to the movable element, and the second state being a state where the magnetic force of the permanent magnet is applied to the movable element.

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