Vehicle, control apparatus for vehicle, and control method for vehicle
US-9849885-B2 · Dec 26, 2017 · US
Control apparatus for power transmission system
US10260575B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10260575-B2 |
| Application number | US-201515519292-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 9, 2015 |
| Priority date | Oct 17, 2014 |
| Publication date | Apr 16, 2019 |
| Grant date | Apr 16, 2019 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
At the time when a hydraulic actuator is operated to engage a dog clutch, after it is detected that a hydraulic pressure for operating the hydraulic actuator is higher than or equal to a predetermined hydraulic pressure, it is determined whether the dog clutch is not engaged. Therefore, non-engagement determination due to insufficient hydraulic pressure for operating the hydraulic actuator is prevented. Thus, at the time when the hydraulic actuator is operated to engage the dog clutch, it is possible to prevent consumption of time to engage the dog clutch due to unnecessary re-engagement operation.
First claim
Opening claim text (preview).
What is claimed is: 1. A control apparatus for a power transmission system, the power transmission system including a dog clutch and a hydraulic actuator, the dog clutch being configured to connect or interrupt a power transmission path that transmits power of a driving force source to a drive wheel side, the hydraulic actuator being configured to operate to engage or release the dog clutch, the control apparatus comprising: an electronic control unit configured to: when the electronic control unit operates the hydraulic actuator to engage the dog clutch, (i) determine whether the dog clutch is not engaged when the electronic control unit detects that a hydraulic pressure for operating the hydraulic actuator is higher than or equal to a predetermined hydraulic pressure, and (ii) operate the hydraulic actuator to engage the dog clutch again when the electronic control unit determines that the dog clutch is not engaged, wherein: the power transmission system further includes a mechanical oil pump, the mechanical oil pump is configured to generate a source pressure for the predetermined hydraulic pressure that operates the hydraulic actuator by being rotationally driven by the driving force source, and the electronic control unit is configured to determine whether the hydraulic pressure for operating the hydraulic actuator is higher than or equal to the predetermined hydraulic pressure at a time when the driving force source starts operating in a state where the driving force source is stopping. 2. The control apparatus according to claim 1 , wherein the electronic control unit is configured to determine whether the dog clutch is not engaged based on a moving distance of a movable member that engages the dog clutch. 3. The control apparatus according to claim 1 , wherein the predetermined hydraulic pressure is a predetermined lower limit of the hydraulic pressure for engaging the dog clutch. 4. A control apparatus for a power transmission system, the power transmission system including a dog clutch and a hydraulic actuator, the dog clutch being configured to connect or interrupt a power transmission path that transmits power of a driving force source to a drive wheel side, the hydraulic actuator being configured to operate to engage or release the dog clutch, the control apparatus comprising: an electronic control unit configured to: when the electronic control unit operates the hydraulic actuator to engage the dog clutch, determine whether the dog clutch is not engaged based on rotational speeds of two rotating members, which change as the dog clutch is engaged, wherein: the power transmission system further includes a mechanical oil pump, the mechanical oil pump is configured to generate a source pressure for the predetermined hydraulic pressure that operates the hydraulic actuator by being rotationally driven by the driving force source, and the electronic control unit is configured to determine whether the hydraulic pressure for operating the hydraulic actuator is higher than or equal to the predetermined hydraulic pressure at a time when the driving force source starts operating in a state where the driving force source is stopping.
Assignees
Inventors
Classifications
Inputs being a function of engine parameters (F16H59/14 takes precedence) · CPC title
with endless flexible members · CPC title
Facilitating disengagement of a dog clutch, e.g. by applying a pretension on the disengaging elements · CPC title
Pressure · CPC title
CVT using endless flexible members · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10260575B2 cover?
- At the time when a hydraulic actuator is operated to engage a dog clutch, after it is detected that a hydraulic pressure for operating the hydraulic actuator is higher than or equal to a predetermined hydraulic pressure, it is determined whether the dog clutch is not engaged. Therefore, non-engagement determination due to insufficient hydraulic pressure for operating the hydraulic actuator is p…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16D48/066. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 16 2019 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).