CN104442818B - 一种amt车型在松软路面下的起步方法 - Google Patents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/02—Clutches
- B60W2510/0208—Clutch engagement state, e.g. engaged or disengaged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0604—Throttle position
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- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/104—Output speed
- B60W2510/1045—Output speed change rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/021—Clutch engagement state
- B60W2710/022—Clutch actuator position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
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Abstract
本AMT车型在松软路面下的起步方法,依次包括如下步骤:a)当车辆处于松软路面需要起步时,驾驶员按下功能开关;b)BCU检查当前车辆的状态;c)BCU监控发动机油门开度是否超过低怠速开关值;d) BCU向发动机ECU发送控制信号,使发动机转速升高到额定转速;e)BCU向TCU发送禁止换挡及离合器结合控制信号;f)TCU控制离合器助力缸电磁阀动作,迅速结合离合器,不再换挡;g)离合器结合后,车辆获得初速度,并驶离松软路面。BCU检查车辆静止等前提条件满足后,然后当踩下油门准备起步时,会首先控制发动机转速到额定转速,然后控制自动变速器电子控制单元迅速结合离合器,使车辆瞬间获得前冲动力,从而驶离松软路面。因此确保重型商用车在陷入松软路面时,可以脱困起步。
Description
技术领域
本发明涉及重型商用车控制技术领域,具体涉及一种AMT车型在松软路面下的起步方法。
背景技术
对重型商用车自动机械式变速器(AMT)来说,在自动模式下应能够根据当前路况和车况信息代替驾驶员自动选择和挂入合适挡位。但AMT没有眼睛,不能像驾驶员那样了解到前方的路况信息,从而对挡位做出预判,而只能被动适应路况的变化,因而在某些特殊工况下不能满足驾驶要求,如当车辆陷入松软路面时,如果以正常起步方式那样在发动机怠速时结合离合器,就难以使车辆起步。
发明内容
本发明为了克服以上技术的不足,提供了一种确保车辆可以驶离松软路面的AMT车型在松软路面下的起步方法。
本发明克服其技术问题所采用的技术方案是:
本AMT车型在松软路面下的起步方法,依次包括如下步骤:
a)包括连接于BCU的功能开关,当车辆处于松软路面需要起步时,驾驶员按下功能开关,BCU接收信号;
b)BCU检查当前车辆的状态,包括变速器输出轴的转速是否为0、变速器是否挂入前进挡1挡或者倒挡1挡、离合器是否分开、发动机是否处于怠速运行状态以及油门踏板开度是否为0%;
c)BCU监控发动机油门开度是否超过低怠速开关值;
d)如果步骤b)和步骤c)中BCU检测的车辆状态结果以及发动机油门开度状态结果均为是,则BCU向发动机ECU发送转速控制信号,使发动机转速升高到额定转速;
e)BCU向TCU发送禁止换挡及离合器结合控制信号;
f)TCU控制离合器助力缸电磁阀动作,迅速结合离合器,不再换挡;
g) 离合器结合后,车辆获得初速度,BCU向发动机ECU发送扭矩控制命令,使其输出扭矩,以使车辆驶离松软路面;
h) BCU不再向发动机ECU、TCU发送控制命令,使ECU、TCU脱离远程控制模式,进入正常工作模式;
i)
BCU检查变速器输出轴转速是否为0,如果是,则返回执行步骤g),如果否,则车辆进入正常工作模式;
j) 查询驾驶员是否取消此开关,如果取消此开关,则车辆进入正常工作模式,如果否,则返回执行步骤(b)。
为了确保车辆可以顺利从松软路面驶出,当步骤b)中变速器输出轴的转速为0或变速器没有挂入前进挡1挡或者倒挡1挡或离合器处于分开状态或发动机没有处于怠速运行状态以及油门踏板开度不是0%时,直接执行步骤g)。
为了确保车辆可以顺利从松软路面驶出,当步骤c)中BCU监控发动机油门开度没有超过低怠速开关值时,直接执行步骤g)。
本发明的有益效果是:BCU检查车辆静止等前提条件满足后,然后当踩下油门准备起步时,会首先控制发动机转速到额定转速,然后控制自动变速器电子控制单元迅速结合离合器,使车辆瞬间获得前冲动力,从而驶离松软路面。因此确保重型商用车在陷入松软路面时,可以脱困起步。
附图说明
图1为本发明的流程图。
具体实施方式
下面结合附图1对本发明做进一步说明。
本AMT车型在松软路面下的起步方法,依次包括如下步骤:
a)包括连接于BCU(车身控制单元)的功能开关,当车辆处于松软路面需要起步时,驾驶员按下功能开关,BCU接收信号。b)BCU检查当前车辆的状态,包括变速器输出轴的转速是否为0、变速器是否挂入前进挡1挡或者倒挡1挡、离合器是否分开、发动机是否处于怠速运行状态以及油门踏板开度是否为0%。c)BCU监控发动机油门开度是否超过低怠速开关值。d)如果步骤b)和步骤c)中BCU检测的车辆状态结果以及发动机油门开度状态结果均为是,则BCU向发动机ECU发送转速控制信号,使发动机转速升高到额定转速。e)BCU向TCU发送禁止换挡及离合器结合控制信号。f)TCU控制离合器助力缸电磁阀动作,迅速结合离合器,不再换挡。g) 离合器结合后,车辆获得初速度,BCU向发动机ECU发送扭矩控制命令,使其输出扭矩,以使车辆驶离松软路面。h) BCU不再向发动机ECU、TCU发送控制命令,使ECU、TCU脱离远程控制模式,进入正常工作模式。此时发动机ECU恢复由油门控制的模式,TCU则继续采集当前车况信息,自动计算并挂入合适的挡位。i) 并且此时BCU检查变速器输出轴转速是否为0,如果是,说明车辆有可能在松软路面上起步熄火,则返回执行步骤g),如果否,则车辆进入正常工作模式。j) 查询驾驶员是否取消此开关,如果取消此开关,则车辆进入正常工作模式,如果否,则返回执行步骤(b)。BCU检查车辆静止等前提条件满足后,然后当踩下油门准备起步时,会首先控制发动机转速到额定转速,然后控制自动变速器电子控制单元迅速结合离合器,使车辆瞬间获得前冲动力,BCU向发动机ECU发送扭矩控制信号,使其输出扭矩,从而使车辆驶离松软路面。因此确保重型商用车在陷入松软路面时,可以脱困起步。
当步骤b)中变速器输出轴的转速为0或变速器没有挂入前进挡1挡或者倒挡1挡或离合器处于分开状态或发动机没有处于怠速运行状态以及油门踏板开度不是0%时,直接执行步骤g)。
当步骤c)中BCU监控发动机油门开度没有超过低怠速开关值时,直接执行步骤g)。
Claims (3)
1.一种AMT车辆在松软路面下的起步方法,其特征在于:依次包括如下步骤:
a)包括连接于BCU的功能开关,当车辆处于松软路面需要起步时,驾驶员按下功能开关,BCU接收信号;
b)BCU检查当前车辆的状态,包括变速器输出轴的转速是否为0、变速器是否挂入前进挡1挡或者倒挡1挡、离合器是否分开、发动机是否处于怠速运行状态以及油门踏板开度是否为0;
c)BCU监控发动机油门开度是否超过低怠速开关值;
d)如果步骤b)和步骤c)中BCU检测的车辆状态结果以及发动机油门开度状态结果均为是,则BCU向发动机ECU发送转速控制信号,使发动机转速升高到额定转速;
e)BCU向TCU发送禁止换挡及离合器结合控制信号;
f)TCU控制离合器助力缸电磁阀动作,迅速结合离合器,不再换挡;
g)离合器结合后,车辆获得初速度,BCU向发动机ECU发送扭矩控制命令,使其输出扭矩,以使车辆驶离松软路面;
h) BCU不再向发动机ECU、TCU发送控制命令,使发动机ECU、TCU脱离远程控制模式,进入正常工作模式;
i)
BCU检查变速器输出轴转速是否为0,如果是,则返回执行步骤g),如果否,则车辆进入正常工作模式;
j) 查询驾驶员是否取消此开关,如果取消此开关,则车辆进入正常工作模式,如果否,则返回执行步骤(b)。
2.根据权利要求1所述的AMT车辆在松软路面下的起步方法,其特征在于:当步骤b)中变速器输出轴的转速为0或变速器没有挂入前进挡1挡或者倒挡1挡或离合器处于分开状态或发动机没有处于怠速运行状态以及油门踏板开度不是0时,直接执行步骤g)。
3.根据权利要求1所述的AMT车辆在松软路面下的起步方法,其特征在于:当步骤c)中BCU监控发动机油门开度没有超过低怠速开关值时,直接执行步骤g)。
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