Shift device of dual clutch transmission
US-10113641-B2 · Oct 30, 2018 · US
Methods and systems for a transmission shift assembly
US11530747B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11530747-B2 |
| Application number | US-202017081797-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 27, 2020 |
| Priority date | Aug 3, 2020 |
| Publication date | Dec 20, 2022 |
| Grant date | Dec 20, 2022 |
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.
Various methods and systems are provided for a shift assembly for a vehicle transmission. In one example, a shift assembly for a transmission includes a first barrel cam including a first cam track; a second barrel cam arranged coaxially with the first barrel cam and including a second cam track; a first motor configured to drive the first barrel cam independent of the second barrel cam; and a second motor configured to drive the second barrel cam independent of the first barrel cam.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method, comprising: controlling a rotational position of a first barrel cam of a shift assembly of a transmission around a rotational axis via a first motor; controlling a rotational position of a second barrel cam of the shift assembly around the rotational axis via a second motor, independent of the rotational position of the first barrel cam; and adjusting a shift timing of the transmission via the first barrel cam and the second barrel cam responsive to an oil temperature of the transmission, wherein adjusting the shift timing based on the oil temperature includes adjusting a relative rotation timing of the first barrel cam and the second barrel cam based on the oil temperature. 2. The method of claim 1 , wherein adjusting the relative rotation timing of the first barrel cam and the second barrel cam includes maintaining a duration between disengagement of a second gear of the transmission and engagement of a third gear of the transmission by retarding a rotation of the second barrel cam relative to a rotation of the first barrel cam responsive to the oil temperature. 3. The method of claim 1 , wherein adjusting the relative rotation timing of the first barrel cam and the second barrel cam includes reducing a duration between disengagement of a second gear of the transmission and engagement of a third gear of the transmission by advancing a rotation of the second barrel cam relative to a rotation of the first barrel cam responsive to the oil temperature. 4. The method of claim 1 , wherein adjusting the relative rotation timing of the first barrel cam and the second barrel cam includes controlling a rotation speed of the first barrel cam based on the oil temperature by controlling an energization of the first motor, and controlling a rotation speed of the second barrel cam based on the oil temperature by controlling an energization of the second motor. 5. The method of claim 4 , wherein controlling the energization of the first motor includes adjusting a duty cycle of the first motor and controlling the energization of the second motor includes adjusting a duty cycle of the second motor, where an amount of adjustment of the duty cycle of the first motor is independent of an amount of adjustment of the duty cycle of the second motor.
Assignees
Inventors
Classifications
all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved · CPC title
Gear shift yokes, {e.g. shift forks} · CPC title
Engine or motor speed · CPC title
characterised by the interface between fork body and shift rod, e.g. fixing means, bushes, cams or pins · CPC title
characterised by the method for generating shift signals · 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 US11530747B2 cover?
- Various methods and systems are provided for a shift assembly for a vehicle transmission. In one example, a shift assembly for a transmission includes a first barrel cam including a first cam track; a second barrel cam arranged coaxially with the first barrel cam and including a second cam track; a first motor configured to drive the first barrel cam independent of the second barrel cam; and a …
- Who is the assignee on this patent?
- Dana Heavy Vehicle Sys Group
- What technology area does this patent fall under?
- Primary CPC classification F16H63/24. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 20 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).