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Automatic Transmission for Vehicles

An automatic transmission and vehicle technology, applied in the direction of vehicle gearbox, vehicle parts, transmission elements, etc., can solve the problems of unable to expand the speed change range, unable to ensure the inter-stage ratio, etc., to improve vehicle mountability, achieve engine noise, and fuel consumption. The effect of improved performance

Active Publication Date: 2018-01-05
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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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. In addition, FIG. 10 shows a cross section of the automatic transmission for a vehicle according to the first embodiment.

[0039] As shown in this figure, the automatic transmission for vehicles of 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 fi...

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, comprising: a first planetary gear set (1) having a first element (11), a second element (14), and a third element in an arrangement order corresponding to a gear ratio on a common speed diagram Element (12); Ravenau type second planetary gear set (2). The input shaft (I) is always connected to the second element (14), and is connectable to the second sun gear (21) by the connection of the first clutch (4), and can be connected to the second sun gear (21) by the connection of the second clutch (5). Coupled with the third sun gear (26). The output member is always connected with the second ring gear (22). The first element (11) is fixable to the stationary part (8) by the coupling of the first brake (3). The third element (12) is always connected to the second planet carrier (25) and is fixable to the stationary part (8) by the coupling of the second brake (6). The third sun gear (26) can be fixed to the stationary part (8) by the coupling of the third brake (7).

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 Patents(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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