Automatic transmission for vehicles

An automatic transmission and vehicle technology, which is applied to vehicle gearboxes, vehicle components, transmission components, etc., can solve the problems of inability to expand the transmission range and inability to ensure the inter-stage ratio, so as to improve vehicle loadability, realize engine noise, and reduce fuel consumption. The effect of performance improvement
CN105190098AActive Publication Date: 2015-12-23JATCO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JATCO LTD
Publication Date
2015-12-23

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Abstract

An automatic transmission for a vehicle comprises a first planetary gearset (1) having a first component (11), a second component (14), and a third component (12), arranged in order of the gear ratio on a shared speed diagram, and a Ravigneaux-type second planetary gearset (2). An input shaft (I) is always connected to the second component (14) and can be connected to a second sun gear (21) by way of a first clutch (4) being engaged and can be engaged to a third sun gear (26) by way of a second clutch (5) being engaged. An output member is always connected to a second ring gear (22). The first component (11) can be locked to a stationary member (8) by way of a first brake (3) being engaged. The third component (12) is always connected to a second pinion carrier (25) and can be locked to the stationary member (8) by way of a second brake (6) being engaged. The third sun gear (26) can be locked to the stationary member (8) by way of a third brake (7) being engaged.
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Description

technical field

[0001] The present invention relates to automatic transmissions for vehicles. Background technique

[0002] An automatic transmission described in Patent Document 1 is known as a conventional automatic transmission for vehicles. This conventional automatic transmission for vehicles has a planetary gear set composed of a so-called Ravigneau type planetary gear set and a single pinion type planetary gear set, and hydraulically operated by two clutches and three brakes. The friction coupling element, thus obtaining 6 forward speeds and 1 reverse speed.

[0003] prior art literature

[0004] patent documents

[0005] Patent Document 1: (Japanese) Unexamined Patent Publication No. 2003-240068

[0006] The problem to be solved by the invention

[0007] However, the above-mentioned conventional automatic transmission for vehicles has the problems described below.

[0008] That is, in the above-mentioned conventional automatic transmission for vehicles, there i...

Claims

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