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Method for engaging a gear in a gear position in an automated shift transmission

一种换档变速器、档位置的技术，应用在传动装置控制、带有齿的元件、皮带/链条/齿轮等方向，能够解决档脱出等问题

Active Publication Date: 2009-06-03
GETRAG FORD TRANSMISSIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case there is a risk that the adjustment ends prematurely and the sliding sleeve has not yet reached the position where the introduction effect starts, so that the gear will come out undesirably

Method used

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  • Method for engaging a gear in a gear position in an automated shift transmission
  • Method for engaging a gear in a gear position in an automated shift transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] FIG. 1 schematically shows the interaction of a tooth 1 of an internal toothing of a sliding sleeve (not further shown here) with a tooth 2 of an idler gear (also not further shown here). When the gear corresponding to the idler gear (not shown) is engaged, the tooth 1 is moved from a neutral position N in the direction R1 to the first gear position GP. The movement in direction R1 takes place parallel to the axis of a (not shown) shaft on which the idler gear (not shown) engages.

[0025] Different positions of the tooth 1 are shown in FIG. 1 , some of which are only indicated by dotted lines. The tooth 1 has a bevel 12 with a point 3 . Adjoining a front corner 4 of the tooth 1 is a transition region 5 parallel to the direction R1 , which transitions into a rear portion 7 at a rear corner.

[0026] The teeth 2 fixed in the axial direction or in the direction R1 have a similar structure. It also includes a sharpened portion 8 with a pointed portion 9 and a rear porti...

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PUM

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Abstract

The present invention relates to a method for engaging a gear into a gear position (GP) in an automated shift transmission, including the steps as follow: A, a step of checking whether a shifting fork reaches a first threshold (S1) or not; B, a step of checking whether the shifting fork reaches a second threshold (S2) or not, and checking whether the shifting fork has a first idle state between the first and the second thresholds (S1, S2) or not; C, if the shifting fork has the first idle state between the first and the second thresholds (S1, S2), an increased shifting force towards the gear position (GP) is applied to the shifting fork; D, when the shifting fork reaches the first threshold (S1), or another idle state of the shifting fork is determined after a time (Delta t) for which the increased shifting force is applied is end, a signal of reaching the gear position (GP) is generated.

Description

technical field [0001] The invention relates to a method for shifting gears into gear positions in an automatic multi-speed transmission. Background technique [0002] Recently, automatic shift transmissions have been mass-produced in automobiles. In these automatic transmissions, the individual gears are engaged, for example, by means of hydraulic or electric actuators. A gear is usually engaged in such a way that at least one of the actuators moves a selector fork, which is mechanically coupled to a sliding sleeve. To engage a gear, starting from the neutral position, by moving the selector fork and thus the sliding sleeve, a positive fit is established between the sliding sleeve, which is non-rotatably connected to a shaft, and a neutral gear , the idler gear is located on the shaft. During positive engagement, the teeth of the internal toothing of the sliding sleeve mesh with the teeth of the coupling gear associated with the idler gear. When a positive fit is establ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/28F16H63/30
CPCF16H2059/6807F16H61/28F16H2061/2823F16H2306/50Y10T74/19251Y10T74/19223
Inventor H·博施
Owner GETRAG FORD TRANSMISSIONS GMBH