The invention provides an emergency trailer control method for the double-clutch automatic gearbox; for a vehicle of the double-clutch automatic gearbox supporting electric control gear shifting, a trailer hard wire switch is additionally arranged, so that when the vehicle needs to be emergently towed under special conditions, the vehicle can be switched out of a gear P, and the vehicle is towed; the trailer hard wire switch comprises a trailer switch and an indicating lamp, a digital input signal is newly added to the instrument, and a digital input signal and two digital output signals are newly added to the TCU. The trailer switch indicating lamp is physically connected with the trailer hard wire switch, the trailer switch outputs digital signals to the TCU, and the TCU respectively outputs the digital signals to the instrument or the trailer switch indicating lamp to remind the instrument and lighten the trailer switch indicating lamp. According to the invention, when a vehicle matched with a DCT or HDT gearbox (a mechanical structure without a forced P gear) with electric control gear shifting is powered on, powered off, a P gear unlocking switch of a gear shifter cannot be unlocked, a gear signal output by an SCU reports an error or a TCU CAN communication fault occurs, the vehicle is allowed to be towed.

    本发明提出了一种双离合自动变速箱紧急拖车控制方法,对于支持电控换档的双离合自动变速箱的车辆,通过增设一个拖车硬线开关,使得车辆在特殊情况下需要被紧急拖车时,车辆能从P档切出,实现车辆被拖;所述拖车硬线开关包括拖车开关及指示灯,在仪表新增一路数字输入信号、TCU新增一路数字输入和两路数字输出信号;拖车开关指示灯与拖车硬线开关物理连接,拖车开关输出数字信号给TCU,TCU分别输出数字信号给仪表或拖车开关指示灯,用于仪表提醒及拖车开关指示灯点亮。本发明使匹配了电控换档的DCT或HDT变速箱(没有强制出P档的机械结构)的车辆,在上电、下电、换档器P档解锁开关无法解锁、SCU输出的档位信号报错或TCU CAN通讯故障时,允许车辆被拖车。


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    Title :

    Emergency trailer control method for double-clutch automatic gearbox


    Additional title:

    一种双离合自动变速箱紧急拖车控制方法


    Contributors:
    XU XUANZHI (author) / FU YONG (author) / LI CHUAN (author) / WEI LI (author) / QIAO HONG (author) / YI ZHONGXIN (author)

    Publication date :

    2021-04-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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