Parking device
AssigneeAisin Aw Co., Ltd.
InventorsEikichi KIDOKORO, Takahiro KOKUBU, Tadamasa TAKEI
Life of this patent
Estimating the term…
Abstract
A device includes a switching valve that performs switching between a first state of supplying a line pressure to an oil chamber defined by a case and a piston and a second state of discharging (draining) hydraulic oil in the oil chamber. The device also includes a drain check valve that closes (prohibits the hydraulic oil in the oil chamber from being discharged) when the line pressure is supplied to the oil chamber, and opens (allows the hydraulic oil in the oil chamber to be discharged) when the line pressure is not supplied to the oil chamber. The hydraulic oil is discharged from the oil chamber through the switching valve and the drain check valve.
Claims17
1-8. (canceled)
A parking device that is mounted on a vehicle and establishes a parking lock state and a parking lock released state, the parking device comprising:
- a movable member that reciprocates in a first direction so as to be capable of performing switching between the parking lock state and the parking lock released state;
- an elastic member that exerts an elastic force to urge the movable member toward one side of the first direction;
- a housing that accommodates the movable member and forms a hydraulic oil chamber in cooperation with the movable member;
- a switching valve that performs switching between supply of hydraulic oil to the hydraulic oil chamber and discharge of the hydraulic oil from the hydraulic oil chamber;
- and
- a discharge valve that is separately structured from the switching valve, and that prohibits the hydraulic oil from being discharged from the hydraulic oil chamber when the hydraulic oil is supplied from the switching valve to the hydraulic oil chamber, and allows the hydraulic oil to be discharged from the hydraulic oil chamber when the hydraulic oil is not supplied from the switching valve to the hydraulic oil chamber, wherein
- the hydraulic oil is discharged from the hydraulic oil chamber through the switching valve and the discharge valve.
Dependencies are inferred from the claim text.