Multi-speed transmission
US-9217494-B2 · Dec 22, 2015 · US
Method for controlling a multi-speed transmission having four planetary gear sets for producing at least nine gear speeds
US8961355B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8961355-B2 |
| Application number | US-201113187654-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 21, 2011 |
| Priority date | Jul 21, 2011 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
Official abstract text for this publication.
A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. A method for controlling the transmission selectively engages the torque transmitting devices in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for controlling a transmission, the method comprising: providing an input member; providing an output member; providing first, second, third and fourth planetary gear sets each having first, second and third members; providing a first interconnecting member for continuously interconnecting the third member of the first planetary gear set with first members of the third and fourth planetary gear sets; providing a second interconnecting member…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F16H3/66Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8961355B2 cover?
- A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. A method for controlling the transmission selectively engages the torque tran…
- Who is the assignee on this patent?
- Hart James M, Olson Bret M, Wittkopp Scott H, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification F16H3/66. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 24 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).