Multi-speed transmission
US-9217494-B2 · Dec 22, 2015 · US
Vehicular automatic transmission
US9033845B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9033845-B2 |
| Application number | US-201313740560-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 14, 2013 |
| Priority date | Jan 18, 2012 |
| Publication date | May 19, 2015 |
| Grant date | May 19, 2015 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A vehicular automatic transmission includes three single pinion planetary gear sets and a plurality of engagement elements. A plurality of gears is selectively established by three of the plurality of engagement elements being engaged and three of the plurality of engagement elements being released. One of the plurality of engagement elements is a dedicated reverse engagement element that is engaged when a reverse gear is established and is released when a forward gear is established.
First claim
Opening claim text (preview).
What is claimed is: 1. A vehicular automatic transmission comprising: three single pinion planetary gear sets; and a plurality of engagement elements, a plurality of gears being selectively established by three of the plurality of engagement elements being engaged and three of the plurality of engagement elements being released, and one of the plurality of engagement elements being a dedicated reverse engagement element that is engaged when a reverse gear is established and is released when a forward gear is established, wherein the plurality of engagement elements is four clutch elements and two brake elements, wherein the three single pinion planetary gear sets are a first planetary gear set, a second planetary gear set, and a third planetary gear set; the four clutch elements are a first clutch element, a second clutch element, a third clutch element, and a fourth clutch element; the two brake elements are a first brake element and a second brake element; a carrier of the first planetary gear set and a carrier of the third planetary gear set are connected together; the first clutch element selectively connects the carrier of the first planetary gear set and the carrier of the third planetary gear set to an input member; the second clutch element selectively connects a ring gear of the first planetary gear set to a carrier of the second planetary gear set; the third clutch element selectively connects a ring gear of the second planetary gear set to a sun gear of the third planetary gear set; the fourth clutch element selectively connects the carrier of the second planetary gear set to the sun gear of the third planetary gear set; the first brake element selectively connects the carrier of the first planetary gear set and the carrier of the third planetary gear set to a non-rotating member; the second brake element selectively connects the ring gear of the second planetary gear set to the non-rotating member; a sun gear of the second planetary gear set is connected to the input member; a sun gear of the first planetary gear set is connected to the non-rotating member; and a ring gear of the third planetary gear set is connected to an output member. 2. The automatic transmission according to claim 1 , wherein the dedicated reverse engagement element is a mesh engagement element. 3. The automatic transmission according to claim 1 , wherein the dedicated reverse engagement element is mechanically connected to a manual mechanism, and is configured to switch between an engaged state and a released state in conjunction with the manual mechanism being driven.
Assignees
Inventors
Classifications
- F16H3/62Primary
Gearings having three or more central gears (F16H3/68 - F16H3/78 take precedence) · CPC title
with six engaging means · CPC title
- F16H3/66Primary
composed of a number of gear trains without drive passing from one train to another · CPC title
with three sets of orbital gears · CPC title
the gear ratios comprising two reverse speeds · CPC title
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Frequently asked questions
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- What does patent US9033845B2 cover?
- A vehicular automatic transmission includes three single pinion planetary gear sets and a plurality of engagement elements. A plurality of gears is selectively established by three of the plurality of engagement elements being engaged and three of the plurality of engagement elements being released. One of the plurality of engagement elements is a dedicated reverse engagement element that is en…
- Who is the assignee on this patent?
- Oita Shinji, Morise Masaru, Kasuya Satoru, and 6 more
- What technology area does this patent fall under?
- Primary CPC classification F16H3/62. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 19 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).