PLUNGER ELECTRIC FUEL PUMP
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A plunger electric fuel pump includes a cylinder; a plunger; a pump body; 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; 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. The 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, the second state being a state where the magnetic force of the permanent magnet is applied to the movable element.
2 Citations
3 Claims
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1. A plunger electric fuel pump comprising:
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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, wherein the 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. - View Dependent Claims (2, 3)
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Specification