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Method for learning clutch characteristic in dual clutch transmission vehicle

A clutch and side clutch technology, applied in the field of learning the characteristics of dry clutches, can solve problems such as difficult to estimate torque, and achieve the effect of smooth change

Inactive Publication Date: 2017-05-24
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to estimate the delivered torque during driving the vehicle

Method used

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  • Method for learning clutch characteristic in dual clutch transmission vehicle
  • Method for learning clutch characteristic in dual clutch transmission vehicle
  • Method for learning clutch characteristic in dual clutch transmission vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0023] A method for learning clutch characteristics in a DCT vehicle according to the present disclosure may include a shift condition determining step, a synchronizing step, a clutch release determining step, and a disengagement side clutch learning step.

[0024] refer to figure 1 and figure 2 Describing the present disclosure in detail, the controller 1 may receive a value representing the driving state of the vehicle and determine whether the current driving state satisfies the shift condition in the shift condition determining step.

[0025] For example, in the shift condition determination step, an APS signal is input in response to stepping on the accelerator pedal 3, and it may be determined whether or not a power-on downshifting condition is satisfied. Here, the condition for initiating a downshift may refer to a state in wh...

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Abstract

A method for learning a characteristic of a clutch in a DCT vehicle includes a shifting condition determination step for determining whether a shifting condition is satisfied, a synchronization step for partly reducing torque of a disengagement-side clutch in order to synchronize an engine speed with a speed of an engagement-side input shaft when shifting is started when the shifting condition is satisfied, a clutch release determination step for determining whether a slip amount of a disengagement-side clutch exceeds a reference slip amount, and a disengagement-side clutch learning step for updating clutch torque on a characteristic curve of the disengagement-side clutch using the torque of the disengagement-side clutch that is controlled to allow the slip amount of the disengagement-side clutch to exceed the reference slip amount in the clutch release determination step, and for learning the updated clutch torque.

Description

technical field [0001] The present disclosure generally relates to methods for learning characteristics of dry clutches. More specifically, the present disclosure relates to methods for learning clutch characteristics in a dual clutch transmission (DCT) vehicle. Background technique [0002] An automated manual transmission is a system for automatically controlling a transmission based on a manual transmission mechanism. Unlike automatic transmissions, which use a torque converter and wet multi-plate clutches, automated manual transmissions use dry clutches to transfer engine torque. [0003] Specifically, the dry clutch has a characteristic that clutch transmission torque varies according to various factors such as tolerance of components, wear due to wear, thermal deformation caused by high temperature, change in friction coefficient of discs, and the like. Therefore, it is difficult to estimate the transmitted torque during driving of the vehicle. [0004] Also, no cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/04F16H59/56F16H59/18F16H59/46F16D48/00
CPCF16D48/00F16H59/18F16H59/46F16H59/56F16H61/0403F16H2061/0407F16H2059/465F16H2061/0459F16H61/688F16H2061/0087F16H2061/0462F16D2500/3027F16D2500/30412F16D2500/30421F16D2500/30806F16D2500/30814F16D2500/30816F16D2500/3144F16D2500/31466F16D2500/50236F16D2500/70408F16D2500/7041F16D2500/70426F16D2500/7044F16D2500/70605F16D48/06F16D2500/10412F16D2500/30406F16D13/385F16D2500/1045F16D2500/308F16D2500/50251F16H3/006F16H63/46
Inventor 曹圣铉李浩荣
Owner HYUNDAI MOTOR CO LTD
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