Multi-shifting speed variator

A multi-speed transmission, automatic transmission technology, applied in the direction of vehicle gearbox, multi-gear ratio transmission, transmission, etc., to achieve good efficiency, reduce loss, and small torque.

Inactive Publication Date: 2007-11-07
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, transmissions of this type require little installation effort, in particular a small number of shifting elements, double-stage shifting is avoided in the sequential shifting mode, and only one gearshift is correspondingly replaced when shifting in a restricted gear combination. blocking element

Method used

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  • Multi-shifting speed variator
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  • Multi-shifting speed variator

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Embodiment Construction

[0027] FIG. 1 shows a multi-speed transmission according to the invention with an input shaft 1 and an output shaft 2 which are arranged in a housing G. In FIG. Four planetary gearsets P1 , P2 , P3 and P4 are provided, which are configured as negative planetary gearsets and are preferably consecutive in the axial or power flow direction in the sequence of P1 , P2 , P3 and P4 .

[0028] As shown in FIG. 1 , six shifting elements are provided, ie three brakes 03 , 04 , 05 and three clutches 15 , 27 , 36 . These clutches are preferably designed as multi-disk clutches.

[0029] Using these shifting elements, it is possible to selectively switch between 9 forward gears and 1 reverse gear. The multi-speed transmission according to the invention has a total of seven rotatable shafts, namely shafts 1 , 2 , 3 , 4 , 5 , 6 and 7 .

[0030] According to the invention, in the multi-speed transmission of FIG. 1 it is provided that the drive is performed via shaft 1, which is permanently c...

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Abstract

A multi-speed transmission with nine forward gears and one reverse gear, comprising four planetary gearsets, seven rotary shafts and six shifting elements, in which the construction costs are optimized and the main factors with regard to traction meshing losses are improved Efficiency in driving gear. In addition, in the multi-speed transmission of the present invention, small torque acts on the shifting elements and planetary gear sets, the rotational speed of the shaft is small, and the shifting elements and planetary gear sets are less.

Description

technical field [0001] The invention relates to a multi-speed transmission of the planetary gear type as stated in the preamble of claim 1, in particular an automatic transmission for motor vehicles. Background technique [0002] According to the prior art, automatic transmissions, especially for motor vehicles, comprise planetary gear sets, which are shifted by means of friction or shifting elements such as clutches and brakes, and which are usually associated with actuation under sliding action and optionally provided with tap-off clutches Components such as hydrodynamic torque converters or fluid couplings are connected. [0003] EP0434525A1 proposes such a transmission. It basically consists of an input shaft and an output shaft arranged in parallel with each other, a double planetary gear set arranged concentrically with the output shaft, and five shifting elements (in the form of three clutches and two brakes), each selectively paired The interlock determines the dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/0065F16H2200/2012F16H2200/2046F16H2200/2097
Inventor 格哈德·贡波采伯格
Owner ZF FRIEDRICHSHAFEN AG
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