Solenoid valve control apparatus and actuator
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasaaki Uechi, Eiji Nakamura
Life of this patent
Estimating the term…
Abstract
In a certain brake control apparatus, a valve main body of a hydraulic control valve and a coil unit are separately formed, are assembled with each other, and are mounted on an actuator block. Further, bias current is secured even though the supply of current is temporarily unnecessary depending on a control state and a period between the termination and the start of the driving of the hydraulic control valve. Accordingly, it may be possible to maintain a contact state between the inner peripheral surface of the coil unit and the outer peripheral surface of the valve main body during the driving control period.
Claims10
A solenoid valve control apparatus comprising:
- a base formed with passages through which a working fluid flows;
- a solenoid valve that includes a valve main body and a coil unit, the valve main body including a valve part and a solenoid part and being fixed to the base so as to make the solenoid part being exposed to the outside of the base, the coil unit being formed of an annular body around which a coil is wound and being arranged so as to surround the solenoid part, and the solenoid valve opening and closing the passages by the opening and closing of the valve part;
- a biasing member that pushes an end face of the coil unit and supports the coil unit by pressing the coil unit against the base;
- and
- a control unit that adjusts an opening of the solenoid valve by controlling the supply of current to the solenoid valve,
- wherein
- the control unit controls the supply of current during a period between the start and termination of the driving of the solenoid valve, while securing bias current for maintaining a contact state between at least an inner peripheral surface of the coil unit and an outer peripheral surface of the valve main body.
An actuator comprising:
- a base formed with passages through which a working fluid flows;
- a solenoid valve that includes a valve main body and a coil unit, the valve main body including a valve part and a solenoid part and being fixed to the base so as to make the solenoid part being exposed to the outside of the base, the coil unit being formed of an annular body around which a coil is wound and being arranged so as to surround the solenoid part, and the solenoid valve opening and closing the passages by the opening and closing of the valve part;
- a biasing member that pushes an end face of the coil unit and supports the coil unit by pressing the coil unit against the base;
- and
- a pressing member that presses at least one of the solenoid part and the coil unit in one direction during the driving of the solenoid valve and maintains the contact state there between.
An actuator comprising:
- a base formed with passages through which a working fluid flows;
- a solenoid valve that includes a valve main body and a coil unit, the valve main body including a valve part and a solenoid part and being fixed to the base so as to make the solenoid part being exposed to the outside of the base, the coil unit being formed of an annular body around which a coil is wound and being arranged so as to surround the solenoid part, and the solenoid valve opening and closing the passages by the opening and closing of the valve part;
- and
- a biasing member that pushes an end face of the coil unit and fixes the coil unit by pressing the coil unit against the base,
- wherein
- the valve main body is fixed to the base while being inclined so as to make an inner peripheral surface of the coil unit to be inclined by a biasing force of the biasing member being substantially parallel to an outer peripheral surface of the solenoid part.
Dependencies are inferred from the claim text.