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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

Active Publication Date: 2015-12-23
JATCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] That is, in the above-mentioned conventional automatic transmission for vehicles, there is a problem that the shift range (R / C: Full gear ratio range, the value obtained by dividing the gear ratio of the first forward speed by the gear ratio of the highest gear ratio) is as small as 6.1, which cannot ensure an appropriate inter-stage ratio and cannot expand the gear range

Method used

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  • Automatic transmission for vehicles
  • Automatic transmission for vehicles
  • Automatic transmission for vehicles

Examples

Experimental program
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Effect test

Embodiment 1

[0036] First, the overall structure of the vehicular automatic transmission according to Embodiment 1 will be described.

[0037] The vehicular automatic transmission of the first embodiment is suitable for a so-called transverse-engine vehicle, a front-wheel-drive vehicle with a front-mounted engine or a rear-wheel-drive vehicle with a rear-mounted engine.

[0038] figure 1 The outline of the vehicular automatic transmission of the first embodiment is shown. also, figure 1 In , the upper half is drawn from the central axis (the axis passing through the central axis of the input shaft I), and the lower half is omitted. also, Figure 10 A cross section of the vehicle automatic transmission of Example 1 is shown.

[0039] As shown in this figure, the automatic transmission for a vehicle according to Embodiment 1 includes: an input shaft I, an output member O ( Figure 10 The transmission gear 50 shown is always connected with the second ring gear 22), the first planetary ge...

Embodiment 2

[0106] Next, an automatic transmission according to Embodiment 2 of the present invention will be described below.

[0107] In addition, the same code|symbol is attached|subjected to the same component as Example 1, and their description is abbreviate|omitted.

[0108] In the automatic transmission of Embodiment 2, only the first planetary gear set 1 is changed from the single-pinion type planetary gear of Embodiment 1 to a double-pinion type planetary gear set. However, along with this, the values ​​of gear ratio, shift range (R / C value), and reverse gear ratio / first gear ratio (Rev / 1st) are also changed.

[0109] In addition, in the same figure, the position of the second brake 6 is changed to move between the second ring gear 22 and the third brake 7, but the action of fixing the first ring gear 12 and the second planet carrier 25 remains unchanged.

[0110] That is, the first planetary gear set 1 has: the first sun gear 11, the first ring gear 12, the first inner planetar...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66F16H3/62
CPCF16H3/663F16H3/666F16H2200/0052F16H2200/2007F16H2200/2023F16H2200/2043F16H2200/0056
Inventor 渡边坚一菅谷祥司小栗和夫有松正夫筱崎隼波多野义明
Owner JATCO LTD
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