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Method for controlling a parallel shift transmission

A technology for shifting transmissions and transmissions, applied in the direction of transmission control, components with teeth, belts/chains/gears, etc., which can solve the problems of reduced reliability and achieve the effect of improving functional reliability

Active Publication Date: 2016-01-20
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is an error in the transmission actuator or the movement of the transmission actuator is implausible, the plausibility of the documents disclosed, for example, by DE 10 2010 009 735 A1 and DE 10 2006 043 075 A1 is reduced

Method used

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  • Method for controlling a parallel shift transmission
  • Method for controlling a parallel shift transmission

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] figure 1 Flowchart 1 is shown for evaluating the gear information available after the reliability degradation. For this purpose, after the start of the sequence, it is checked at branch point 2 whether the plausibility of the position of the shift finger of the transmission actuator for actuating the gears of the parallel shift transmission has been degraded. If this is not the case, normal gear recognition is carried out in block 4 , the transmission actuator continues to operate with the same reliability and the sequence is terminated in block 3 . If the plausibility has been downgraded, it is checked in branch point 5 for each subtransmission whether the transmission information contains the value ENGAGED or PROBED. Here, ENGAGED represents an engaged gear and PROBED represents a verified engaged gear. If this is not the case, the value of the gear information of the corresponding subtransmission 6 is set to the value UNKNOWN in block 6 and sequence 1 is terminated...

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PUM

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Abstract

The invention relates to a method for controlling a parallel transmission comprising two sub-transmissions, each of which comprises multiple gears, wherein at least one shift finger of a transmission actuator is controlled in shift gates of the gears to be shifted using gear information ascertained on the basis of incrementally detected positions that are calibrated by means of a comparison with absolute positions. Only a single gear can be engaged on each sub-transmission due to the construction. A confidence level which is continuously ascertained and which checks the gear information is ascertained, and a normal operation is carried out or a faulty operation is carried out with reset gear information and the transmission actuator is shut down dependent on a state of the confidence level. The aim of the invention is to minimize a breakdown of a vehicle with a parallel transmission. This is achieved in that an emergency operation using an engaged gear of a sub-transmission is allowed despite a downgrade of the confidence level below the threshold when the confidence level is reset as a result of a shift finger not being detected in the gear shift gate when said gear is engaged.

Description

technical field [0001] The invention relates to a method for controlling a parallel-shift transmission having two sub-transmissions each with a plurality of gears, by means of an The gear position information determined from the position controls at least one shift finger of the transmission actuator in the shift channel of the gear to be shifted, wherein only one single gear can be engaged in each sub-transmission due to the structural design. The gear position is determined according to the confidence level of the gear position information which is continuously obtained, and the normal operation is performed according to the state of the reliability level or the failure operation is performed with the gear position information reset and the gear position information is reset. The transmission actuator is deactivated. Background technique [0002] In particular, parallel shift transmissions are known from drive trains with two subtransmissions each having a plurality of ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/12F16H61/28F16H61/688
CPCF16H61/12F16H61/688F16H2059/6807F16H2061/1208F16H2061/1288
Inventor B·施特勒M·申德勒H·普里勒尔
Owner SCHAEFFLER TECH AG & CO KG
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