Method for switching a current in an electromagnet of a switchable solenoid valve, electronic circuit, solenoid valve, pump, and motor vehicle
AssigneeVitesco Technologies GmbH
InventorsTet Kong Brian Chia, Dmitriy Kogan
Life of this patent
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Abstract
An example embodiment relates to a method for switching a current in an electromagnet of a switchable solenoid valve, wherein, in successive switching cycles, the current is in each case switched on in order to close the valve against a force of a spring, and thereby the current is generated by electrical connection of the electromagnet to a voltage source. The example embodiment makes provision for the current in the electromagnet to be generated with a current direction opposite to the respective previous switching cycle in at least two successive switching cycles in a switched operation of the valve.
Claims17
A method for switching a current in an electromagnet of a switchable solenoid valve, comprising:
- in successive switching cycles, switching the current on in order to close the valve against a force of a spring of the solenoid valve, and thereby generating the current by electrical connection of the electromagnet to a voltage source, wherein the current in the electromagnet is generated with a current direction opposite to the respective previous switching cycle in at least two successive switching cycles in a switched operation of the valve.
An electronic circuit for controlling a solenoid valve, comprising:
- a switching circuit connected between a voltage source and an electromagnet of the solenoid valve, the switching circuit comprising a plurality of transistors coupled to the electromagnet;
- and
- a controller which controls the transistors so that in successive switching cycles during a switched operation of the solenoid valve, current passing through the electromagnet is switched in each cycle in order to close the solenoid valve against a force of a spring of the solenoid valve, wherein a direction of the current in a first switching cycle of the successive switching cycles is opposite to the direction of the current in an immediately prior switching cycle of the successive switching cycles.
A motor vehicle, comprising:
- an internal combustion engine which has a fuel injection system, the fuel injection system comprising:
- a fuel tank;
- a fuel pump in fluid communication with the fuel tank and comprising a solenoid valve;
- and an electronic circuit electrically coupled to the solenoid valve and comprising a switching circuit connected between a voltage source of the motor vehicle and an electromagnet of the solenoid valve, the switching circuit comprising a plurality of transistors, and a controller which controls the transistors so that in successive switching cycles during a switched operation of the solenoid valve, current passing through the electromagnet is switched in each switching cycle in order to close the solenoid valve against a force of a spring of the solenoid valve, wherein a direction of the current in a first switching cycle of the successive switching cycles is opposite to the direction of the current in an immediately prior switching cycle of the successive switching cycles.
Dependencies are inferred from the claim text.