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Power downshift calibrating method and system of double-clutch gearbox

A dual-clutch, power downshift technology, applied in the direction of elements with teeth, transmission control, control devices, etc., to save labor costs and ensure calibration accuracy and quality.

Active Publication Date: 2017-07-11
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a calibration method and system suitable for power downshifting of dual-clutch gearboxes involving dual-clutch switching, so as to solve the problems caused by traditional calibration methods

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  • Power downshift calibrating method and system of double-clutch gearbox

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0037] The present invention provides a power downshift calibration method for a dual-clutch gearbox, please refer to figure 1 As shown, wherein the method includes:

[0038] Step S1, setting the target vehicle speed and rotation speed synchronization time, and performing the calibration operation;

[0039] Specifically, from the perspective of actual operation, the target vehicle speed and rotation speed synchronization time can be set at first with a relatively small value, but the specific value should depend on the actual calibratio...

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Abstract

The invention discloses a power downshift calibrating method and system of a double-clutch gearbox. The method comprises the following steps of executing calibration operation so that a vehicle can operate; when the vehicle runs to the preset gear, controlling the throttle opening degree according to the set target vehicle speed, so that a double-clutch gearbox controller and an engine control unit execute powder downshift; sending the rotating speed synchronization time to the double-clutch gearbox controller; in the power downshift process, collecting a longitudinal acceleration signal of the vehicle, and converting the longitudinal acceleration signal into the gear shift impact degree; judging whether the gear shift impact degree is within the preset allowable range or not; according to different conditions, resetting the rotation speed synchronization time or resetting the target vehicle speed; executing the calibration again; finally, screening and storing the calibration parameter combination; finishing the calibration. The method and the system have the advantages that the data analysis and evaluation on the downshift smoothness is realized without depending the experience and subjective feeling of detection personnel, so that the calibration precision and quality are ensured.

Description

technical field [0001] The invention relates to the field of control of dual-clutch gearboxes, in particular to a method and system for calibrating power downshifts of dual-clutch gearboxes. Background technique [0002] Due to its advantages such as fast shifting speed and high transmission efficiency, dual clutch transmission (DCT) has been paid more and more attention. Shift jerk is especially important to the driving experience when using a DCT for power downshifts, especially when the downshift is between two clutches. Shift shock is one of the key indicators to evaluate the quality of DCT control. It is defined as the derivative of acceleration in the straight direction of the vehicle with respect to time. Generally speaking, excessive shift shock means poor downshift smoothness, which will affect the driving experience. The occupants will bring a bad driving experience such as blockage and frustration. [0003] The DCT power downshift process can be briefly describe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/11B60W10/06B60W10/02B60W40/105B60W40/107F16H59/02
CPCB60W10/02B60W10/06B60W10/11B60W40/105B60W40/107B60W2050/0043B60W2520/10B60W2520/105B60W2710/021B60W2710/0644B60W2710/1005F16H59/02
Inventor 黄伟李杰张应兵陈加超马标杜成磊刘芯娟
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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