CN106224537A - 适应挡位失效的变速器换挡控制方法 - Google Patents

适应挡位失效的变速器换挡控制方法 Download PDF

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CN106224537A
CN106224537A CN201610806389.8A CN201610806389A CN106224537A CN 106224537 A CN106224537 A CN 106224537A CN 201610806389 A CN201610806389 A CN 201610806389A CN 106224537 A CN106224537 A CN 106224537A
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gear
point
downshift
upshift
shift
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CN106224537B (zh
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庞学文
蔡文文
宁甲奎
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FAW Group Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0204Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H59/00Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14Inputs being a function of torque or torque demand
    • F16H59/24Inputs being a function of torque or torque demand dependent on the throttle opening
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H59/00Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/74Inputs being a function of engine parameters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0204Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F16H61/0213Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
    • F16H2061/022Calculation or estimation of optimal gear ratio, e.g. best ratio for economy drive or performance according driver preference, or to optimise exhaust emissions

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

本发明涉及一种适应挡位失效的变速器换挡控制方法,其特征在于具体步骤如下:根据发动机万有特性曲线和前进挡速比计算出整车在不同油门开度下的换挡规律;根据当前油门开度对换挡规律进行查表,获得基本升挡点和降挡点;根据前进挡位的失效状态确定各个换挡点的升挡转速修正因子和降挡转速修正因子:获得新的升挡点和降挡点:当整车达到步骤4中的换挡车速时,提示整车换挡。可以根据当前挡位的失效状态实时动态调整换挡规律,拟合出最佳的经济性换挡规律曲线,提高整车的经济性和动力性。

Description

适应挡位失效的变速器换挡控制方法
技术领域
本发明涉及适应挡位失效的变速器换挡控制方法,是自动变速器换挡控制方法。
背景技术
汽车智能换挡策略以最佳经济性或最佳动力性为目标,根据发动机万有特性曲线,结合整车运行状况,驾驶员意图和实时道路情况确定出最佳换挡规律。目前自动变速器的换挡规律制定主要有以下几种类型:单参数,根据车速确定换挡点;二参数,根据车速和油门开度确定换挡点;三参数,根据车速、油门开度和加速度确定换挡点。
以上换挡规律的制定主要是依据驾驶员意图和路况信息,当整车挡位出现故障导致有一个或多个挡位无法使用而必须继续行驶时,以上换挡策略就会因为部分挡位的缺失导致无法满足经济性或动力性要求。例如,整车保持固定油门开度在平路上行驶,假设此时2挡失效,当输出轴转速达到1挡升2挡的升挡点时,由于挡位失效,此时整车继续保持1挡前进,只有当车速达到2挡升3挡的升挡点时,才会换挡。在此过程中,一方面发动机转速上升过高给驾驶员不舒适感,另一方面整车经济性降低;同样的,整车只能在很低车速时才能由3挡降至1挡,此时,由于发动机转速过低有可能会导致熄火。
由以上分析可知,整车挡位失效不仅会对整车的经济性和动力性造成影响,甚至还会造成飞车以及发动机熄火等严重问题。因此,在自动变速器系统中,需要根据挡位失效状态实时调整换挡规律,以满足整车经济性和动力性要求。
发明内容
为了解决以上问题,本发明的目的在于提供一种适应挡位失效的变速器换挡控制方法,可以根据当前挡位的失效状态实时动态调整换挡规律,拟合出最佳的经济性换挡规律曲线,提高整车的经济性和动力性。
本发明的技术方案是这样实现的:适应挡位失效的变速器换挡控制方法,其特征在于具体步骤如下:
步骤一:根据发动机万有特性曲线和前进挡速比计算出整车在不同油门开度下的换挡规律;
步骤二:根据当前油门开度对换挡规律进行查表,获得基本升挡点和降挡点
步骤三:根据前进挡位的失效状态确定各个换挡点的升挡转速修正因子和降挡转速修正因子
升挡转速修正因子
其中,N 表示前进挡位,N =1,…,(M -1),M表示最大前进挡位;表示N挡速比,n表示前进挡位,n=1,…,M - N
降挡转速修正因子
步骤四:根据步骤二和三获得的基本升挡点和降挡点以及升挡和降挡转速修正因子,获得新的升挡点和降挡点
步骤五:当整车达到步骤4中的换挡车速时,提示整车换挡。
本发明的积极效果:1.根据整车当前挡位的失效状态实时动态调整换挡规律,拟合出最佳的经济性换挡规律曲线,提高整车的经济性和动力性。
2.升挡和降挡转速修正因子的设定综合考虑了前进挡速比以及挡位失效状态等不同因素,使换挡规律曲线的调整更符合整车实际状况。
附图说明
图1是本发明的适应挡位失效的变速器换挡控制方法流程图。
图2是某轿车部分换挡规律曲线。
图3是应用挡位失效算法计算得到的换挡规律曲线。
具体实施方式
下面结合附图和实施例对本发明作进一步详细说明。
如图1所示,一种适应挡位失效的变速器换挡控制方法,包括以下步骤:
首先,根据发动机万有特性曲线和前进挡速比计算出整车在不同油门开度下的换挡规律。换挡规律是一个[2*(M-1)×11]的数组,横坐标为油门开度0%,10%,20%,…,90%,100%,纵坐标为换挡点1→2,…,(M-1)→M, M→(M-1),…,2→1,输出数据为对应各换挡点在不同油门开度下的输出轴转速。定义各换挡点换挡类型:升挡为1→2,…,(M-1) →M;降挡为M→(M-1),…,2→1,其中(M-1) →M表示(M-1)挡升M挡。
当整车运行时,根据当前油门开度对换挡规律进行查表,获得此油门开度下的基本升挡点和降挡点
根据前进挡位的失效状态确定各个换挡点的升挡转速修正因子和降挡转速修正因子
升挡转速修正因子
降挡转速修正因子
根据计算出的升挡和降挡转速修正因子计算新的升挡点和降挡点:
图2-图3是本发明专利应用到具体某轿车的一个实例:
如图2 所示,首先,根据某轿车发动机万有特性和前进挡速比情况得到一个原始换挡规律曲线。假设此时整车保持固定油门开度55%在平路上行驶,此时2挡失效,则当整车达到1挡升2挡的换挡点 (如图2 A点)时,由于2挡失效,只有当车速达到2挡升3挡的升挡点(如图2 B点)时,才会换挡。在此过程中,一方面发动机转速上升过高给驾驶员不舒适感,另一方面整车经济性降低。
图3是基于本发明专利所述适用挡位失效的变速器换挡控制方法计算出来的新的换挡曲线,由图3所示,应用本发明专利方法后,1挡升3挡的换挡曲线由原来的曲线m变化为曲线m’,整个换挡点提前,这样,一方面不会发生由于一直保持1挡导致的发动机转速超速,另一方面,使发动机尽可能的工作在经济区域,提高了燃油经济性。

Claims (1)

1.适应挡位失效的变速器换挡控制方法,其特征在于具体步骤如下:
步骤一:根据发动机万有特性曲线和前进挡速比计算出整车在不同油门开度下的换挡规律;
步骤二:根据当前油门开度对换挡规律进行查表,获得基本升挡点和降挡点
步骤三:根据前进挡位的失效状态确定各个换挡点的升挡转速修正因子和降挡转速修正因子
升挡转速修正因子
其中,N 表示前进挡位,N =1,…,(M -1),M 表示最大前进挡位;表示N 挡速比,n表示前进挡位,n=1,…,M - N;
降挡转速修正因子
步骤四:根据步骤二和三获得的基本升挡点和降挡点以及升挡和降挡转速修正因子,获得新的升挡点和降挡点
步骤五:当整车达到步骤4中的换挡车速时,提示整车换挡。
CN201610806389.8A 2016-09-07 2016-09-07 适应挡位失效的变速器换挡控制方法 Active CN106224537B (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019001372A1 (zh) * 2017-06-28 2019-01-03 长城汽车股份有限公司 变速器最高挡速比的确定方法和装置

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US5593365A (en) * 1994-08-02 1997-01-14 Toyota Jidosha Kabushiki Kaisha Control system for automatic transmission
JPH10212982A (ja) * 1997-01-31 1998-08-11 Mazda Motor Corp 自動変速機の制御装置
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CN103415729A (zh) * 2011-04-07 2013-11-27 腓特烈斯港齿轮工厂股份公司 用于改变至少一个切换元件的运行状态的设备
CN105083001A (zh) * 2015-09-16 2015-11-25 丹阳兴隆车辆部件有限公司 一种基于自修正换挡点的换挡提示装置
CN105593576A (zh) * 2013-10-04 2016-05-18 舍弗勒技术股份两合公司 一种用于控制具有双离合变速器的动力传动系的方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5593365A (en) * 1994-08-02 1997-01-14 Toyota Jidosha Kabushiki Kaisha Control system for automatic transmission
JPH10212982A (ja) * 1997-01-31 1998-08-11 Mazda Motor Corp 自動変速機の制御装置
CN101142426A (zh) * 2005-03-16 2008-03-12 卢克摩擦片和离合器两合公司 用于控制具有主动互锁的换档变速器中换档过程的方法
CN103415729A (zh) * 2011-04-07 2013-11-27 腓特烈斯港齿轮工厂股份公司 用于改变至少一个切换元件的运行状态的设备
CN105593576A (zh) * 2013-10-04 2016-05-18 舍弗勒技术股份两合公司 一种用于控制具有双离合变速器的动力传动系的方法
CN105083001A (zh) * 2015-09-16 2015-11-25 丹阳兴隆车辆部件有限公司 一种基于自修正换挡点的换挡提示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019001372A1 (zh) * 2017-06-28 2019-01-03 长城汽车股份有限公司 变速器最高挡速比的确定方法和装置

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