Control of a powertrain backlash
US-2019128345-A1 · May 2, 2019 · US
Vehicle automatic transmission device, and vehicle including the same
US11215247B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11215247-B2 |
| Application number | US-202017070983-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 15, 2020 |
| Priority date | Oct 17, 2019 |
| Publication date | Jan 4, 2022 |
| Grant date | Jan 4, 2022 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
An automatic transmission device for a vehicle driven by transmitting a torque of an engine to driving wheels includes a clutch provided in a torque transmission system extending from the engine to the driving wheels, a transmission located between the clutch and the driving wheels in the torque transmission system, and a transmission controller. The transmission controller is configured or programmed to perform a torque feedback-control to bring the clutch into a sliding state in response to issue of a shift command and feedback-control a transmission torque to a target torque, disengage the clutch after the torque feedback-control, change a shift stage of the transmission according to the shift command after disengaging the clutch, and engage the clutch after changing the shift stage.
First claim
Opening claim text (preview).
What is claimed is: 1. An automatic transmission device for a vehicle driven by transmitting a torque of an engine to driving wheels, the vehicle automatic transmission device comprising: a clutch provided in a torque transmission system that extends from the engine to the driving wheels; a transmission located between the clutch and the driving wheels in the torque transmission system; and a transmission controller configured or programmed to: perform a torque feedback-control to bring the clutch into a sliding state in response to issue of a shift command and feedback-control a transmission torque to a target torque; disengage the clutch after the torque feedback-control; change a shift stage of the transmission according to the shift command after disengaging the clutch; and engage the clutch after changing the shift stage. 2. The vehicle automatic transmission device according to claim 1 , wherein the transmission controller is configured or programmed to induce sliding in the clutch to gradually reduce an engagement strength of the clutch at a predetermined clutch disengagement rate in response to the issue of the shift command until a sliding state of the clutch is detected; and upon the detection of the sliding state of the clutch, start the torque feedback-control. 3. The vehicle automatic transmission device according to claim 2 , wherein the transmission controller is configured or programmed to set the clutch disengagement rate based on a transmission torque observed immediately before starting to induce sliding in the clutch. 4. The vehicle automatic transmission device according to claim 1 , wherein the transmission controller is configured or programmed to disengage the clutch after a lapse of a predetermined period of time from the issue of the shift command. 5. The vehicle automatic transmission device according to claim 1 , wherein the shift command includes a downshift command. 6. The vehicle automatic transmission device according to claim 1 , wherein the torque transmission system includes an elastic torsion element located between the transmission and the driving wheels. 7. The vehicle automatic transmission device according to claim 6 , wherein the elastic torsion element includes a clutch damper. 8. A vehicle comprising: an engine; driving wheels; and the vehicle automatic transmission device according to claim 1 .
Assignees
Inventors
Classifications
Signals to a clutch outside the gearbox · CPC title
Selection of the gear ratio · CPC title
Transmission input torque, e.g. measured or estimated engine torque · CPC title
- F16D48/06Primary
Control by electric or electronic means, e.g. of fluid pressure · CPC title
- F16D48/068Primary
using signals from a manually actuated gearshift linkage · CPC title
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Frequently asked questions
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- What does patent US11215247B2 cover?
- An automatic transmission device for a vehicle driven by transmitting a torque of an engine to driving wheels includes a clutch provided in a torque transmission system extending from the engine to the driving wheels, a transmission located between the clutch and the driving wheels in the torque transmission system, and a transmission controller. The transmission controller is configured or pro…
- Who is the assignee on this patent?
- Yamaha Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16D48/06. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 04 2022 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).