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Automatic transmission

By combining a planetary gear train and a parallel shaft gear train in a parallel-shaft automatic transmission, clutch and brake control are optimized, the balance problem between fuel consumption and compactness is solved, and efficient fuel consumption and transmission efficiency are achieved.

Inactive Publication Date: 2006-06-21
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of configuring an automatic transmission using a parallel-shaft gear train structure, there is a problem that although the transmission efficiency can be improved by reducing the number of meshes, at this time, since a plurality of gear trains corresponding to the number of stages of the shift range are required, As a result, the overall size of the automatic transmission becomes large, which impairs its carrying capacity in automobiles.
On the other hand, when an automatic transmission is configured using a planetary gear train structure, there is a problem that although the overall size can be made compact and compact, the power transmission resistance increases due to the large number of meshes of the internal gears, and the transmission Efficiency is easy to reduce

Method used

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Embodiment Construction

[0026] Preferred embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 , the automatic transmission of the present invention has the following structure: a planetary gear train PG; a countershaft 5 arranged in parallel with the rotation axis of the planetary gear train PG (the first main shaft 3 and the second main shaft 4 described later); Three sets of gear trains G1-G3 and six friction engagement mechanisms (brakes B1, B2 and clutches C1-C4).

[0027] The planetary gear train PG is composed of the following elements: a sun gear S connected to the first main shaft 3 located at its rotation center as the input shaft of the transmission; a pinion P meshing with the sun gear and revolving around itself while rotating; a holding pinion P is free to rotate and revolves around the axis of the sun gear S at the same number of revolutions as the pinion; it has internal teeth that mesh with the pinion P and can rotate around t...

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Abstract

The invention discloses an automatic transmission, which has the following structure: it has a sun gear (S), a carrier (C) and a ring gear (R), and the sun gear (S) is connected to a planetary gear of a first main shaft (3) row (PG); countershaft (5) arranged parallel to the axis of rotation of this planetary gear row (PG); first brake (B1) capable of fixedly holding the ring gear (R); The first drive gear (6), and the first gear train (G1) formed by the first driven gear (7) which is engaged with the first drive gear (6) and arranged on the output shaft to rotate relatively; The driving gear train (7) picks and hangs the first clutch (C1) freely connected on the layshaft (5); the third driving gear (10) which is relatively rotatable provided by the relative bracket (C), and with this The third drive gear (10) is meshed and connected to the third gear train (G3) formed by the third driven gear (11) on the output shaft; the third drive gear (10) is freely connected to the bracket ( C) the third clutch (C3); the fourth clutch (C4) which is freely connected to the sun gear (S) and the ring gear (R).

Description

technical field [0001] The present invention relates to an automatic transmission composed of a combination of planetary gear trains in a parallel shaft automatic transmission. Background technique [0002] In order to respond to environmental problems, the demand for fuel consumption of automobiles and the like is increasing. For this reason, measures to reduce fuel consumption are also being sought in automatic transmissions mounted on such automobiles, such as multi-stage shifting ranges to efficiently transmit the output from the engine to the wheels. [0003] As a multi-stage method of automatic transmission, a planetary gear type transmission that performs speed change by combining planetary gear trains, and a parallel shaft type transmission that performs speed change by switching multiple gear trains mounted on multiple parallel shafts have been proposed. It is well known (for example, refer to Japanese Unexamined Patent Application Publication No. 60-4651 (page 3-4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/44F16H3/54F16H37/04
CPCF16H37/04F16H2200/0043F16H2200/0052F16H2200/0008F16H3/44
Inventor 杉野聪一高桥司
Owner HONDA MOTOR CO LTD
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