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Automatic Transmission

A technology of automatic transmission and transmission housing, which is applied in the direction of vehicle gearbox, transmission element, transmission device, etc., can solve the problem of increasing friction loss, and achieve the effect of improving fuel efficiency and improving fuel efficiency.

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

AI Technical Summary

Problems solved by technology

In this case, the number of engagement mechanisms that are in the disengaged state for each shift stage is five or more, and the friction loss is further increased.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0031] figure 1 The first embodiment of the automatic transmission of the present invention is shown. The automatic transmission of the first embodiment includes: an input shaft 2 , which is rotatably supported in the transmission case 1 , and transmits a drive source such as an internal combustion engine (engine) not shown in the figure through a damper DA and a starting clutch C0 . driving force output by the ENG; and an output member 3 constituted by an output gear. The starting clutch C0 is configured to be switchable between a transmission state in which the power of the drive source ENG can be transmitted to the input shaft 2 and an off state in which the transmission is interrupted.

[0032] The rotation of the output member 3 is transmitted to left and right driving wheels of the vehicle via a differential gear and a propeller shaft not shown in the figure. In addition, instead of the starting clutch C0, a torque converter having a lock-up clutch may be provided.

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PUM

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Abstract

The present invention provides an automatic transmission capable of establishing a shift of more than nine forward gears without increasing friction. The automatic transmission has four planetary gear mechanisms and seven engaging mechanisms. The first element is connected to the input shaft, and the tenth element is connected to the output member. The second element, the fifth element, and the ninth element are connected to form a first combination. The first clutch, the second clutch, the third clutch, and the fourth clutch freely connect the first element and the third coupled body, the first element and the fourth element, the sixth element and the second coupled body, and the tenth element and the fourth coupled body, respectively. triplex. The first brake, the second brake, and the third brake freely fix the seventh element, the sixth element, and the fourth element to the transmission case, respectively. The automatic transmission engages at least three of the seven engagement mechanisms to establish each shift gear.

Description

technical field [0001] The present invention relates to an automatic transmission that shifts the rotation of an input shaft in multiple steps via a plurality of planetary gear mechanisms and outputs the output from an output member. Background technique [0002] Conventionally, there is known an automatic transmission capable of performing forward eight-speed shifting using a first planetary gear mechanism for input, a second planetary gear mechanism and a third planetary gear mechanism for speed change, and six engaging mechanisms (for example, refer to Patent Document 1 ). [0003] In the automatic transmission of Patent Document 1, a so-called double pinion type planetary gear mechanism is used (because the ring gear and the sun gear rotate in the same direction when the planet carrier is fixed and the sun gear is rotated, it is also called a positive planetary gear mechanism) Or a positive planetary gear mechanism. In addition, when the ring gear is fixed and the sun g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/44F16H3/66
CPCF16H3/66F16H2200/0069F16H2200/2012F16H2200/2048F16H2200/2082F16H3/62
Inventor 饭塚晃平杉野聪一
Owner HONDA MOTOR CO LTD
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