Range switching device
US-9188217-B2 · Nov 17, 2015 · US
Shift control device
US10591052B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10591052-B2 |
| Application number | US-201815996173-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 1, 2018 |
| Priority date | Sep 20, 2017 |
| Publication date | Mar 17, 2020 |
| Grant date | Mar 17, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A shift control device includes: a hydraulic circuit, an actuation valve, a control unit, and a pressure holding valve. The hydraulic circuit is provided with a supply oil passage coupled to a hydraulic oil supply source, a drain oil passage coupled to a tank, and an actuator oil passage coupled to a travel actuator. The actuation valve is provided in the hydraulic circuit and couples the actuator oil passage to the supply oil passage or the drain oil passage. The control unit switches the actuation valve in accordance with a shift position command of a shift operation device. The pressure holding valve is provided in the drain oil passage and holds a pressure of the drain oil passage at a predetermined pressure.
First claim
Opening claim text (preview).
The invention claimed is: 1. A shift control device, comprising: a hydraulic circuit that is provided with a supply oil passage coupled to a hydraulic oil supply source, a drain oil passage coupled to a tank, and an actuator oil passage coupled to a travel actuator, an actuation valve that is provided in the hydraulic circuit, the actuation valve being configured to couple the actuator oil passage to one of the supply oil passage and the drain oil passage; a control unit configured to switch the actuation valve in accordance with a shift position command of a shift operation device; and a pressure holding valve that is provided in the drain oil passage and configured to hold a pressure of the drain oil passage at a predetermined pressure. 2. The shift control device according to claim 1 , wherein the actuator oil passage of the hydraulic circuit includes multiple actuator oil passages, and wherein the multiple actuator oil passages are coupled to the drain oil passage. 3. The shift control device according to claim 1 , wherein the pressure holding valve includes multiple pressure holding valves provided in parallel in the drain oil passage. 4. The shift control device according to claim 2 , wherein the pressure holding valve includes multiple pressure holding valves provided in parallel in the drain oil passage. 5. A shift control device, comprising: a hydraulic circuit that is provided with a supply oil passage coupled to a hydraulic oil supply source, a drain oil passage coupled to a tank, and an actuator oil passage coupled to a travel actuator, an actuation valve that is provided in the hydraulic circuit, the actuation valve being configured to couple the actuator oil passage to one of the supply oil passage and the drain oil passage; a circuitry configured to switch the actuation valve in accordance with a shift position command of a shift operation device; and a pressure holding valve that is provided in the drain oil passage and configured to hold a pressure of the drain oil passage at a predetermined pressure. 6. The shift control device according to claim 1 , wherein the actuation valve couples the actuator oil passage to the supply oil passage. 7. The shift control device according to claim 1 , wherein the actuation valve couples the actuator oil passage to the drain oil passage. 8. The shift control device according to claim 5 , wherein the actuation valve couples the actuator oil passage to the supply oil passage. 9. The shift control device according to claim 5 , wherein the actuation valve couples the actuator oil passage to the drain oil passage.
Assignees
Inventors
Classifications
- F16H61/40Primary
hydrostatic · CPC title
- F16H61/0204Primary
for gearshift control, e.g. control functions for performing shifting or generation of shift signal · CPC title
Circuits for controlling engagement of parking locks or brakes · CPC title
controlled by valves affecting the fluid feed or the fluid outlet of the servomotor (F15B9/06 takes precedence) · CPC title
including control of driveline clutches · CPC title
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- What does patent US10591052B2 cover?
- A shift control device includes: a hydraulic circuit, an actuation valve, a control unit, and a pressure holding valve. The hydraulic circuit is provided with a supply oil passage coupled to a hydraulic oil supply source, a drain oil passage coupled to a tank, and an actuator oil passage coupled to a travel actuator. The actuation valve is provided in the hydraulic circuit and couples the actua…
- Who is the assignee on this patent?
- Subaru Corp
- What technology area does this patent fall under?
- Primary CPC classification F16H61/40. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 17 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).