CN113183742A - 一种节能混凝土搅拌车驱动系统及其控制方法 - Google Patents
一种节能混凝土搅拌车驱动系统及其控制方法 Download PDFInfo
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Abstract
本发明公开了一种节能混凝土搅拌车驱动系统及其控制方法,旨在解决传统混凝土搅拌车存在怠速时间长、发动机热效率低,致使整车燃油经济性普遍较差的问题。所述节能混凝土搅拌车驱动系统包括发动机、发电机、整车驱动电机、变速机构、主减速器及差速器、动力电池、逆变器、上装驱动电机、减速机、搅拌筒,即包括串联混合动力整车驱动系统和电动上装驱动系统;基于所述节能混凝土搅拌车驱动系统,提出驻车和行车两类情况的控制方法。本发明可有效解决混凝土搅拌车怠速时间长、发动机热效率低问题,发动机可以恒温器控制策略始终工作在最低燃油消耗点,同时车辆或搅拌筒制动能量也能实现回收,进而有效改善车辆的燃油经济性和排放特性。
Description
技术领域
本发明涉及工程车技术领域,具体涉及一种节能混凝土搅拌车驱动系统及其控制方法。
背景技术
近年来,全球燃油汽车保有量的增长带来了一系列问题,如环境污染严重、能源短缺等,为此,世界各国相继颁布严苛的法令以限制汽车燃油消耗和尾气排放,因此汽车的节能技术已成为当前汽车领域最重要的研究方向之一,也是各汽车企业为谋求新产品开发,提高产品竞争力,争取市场主动的重要技术手段。
专用车辆作为国家工业发展和进步的有力表征,其相较于传统乘用车往往具有更加恶劣的工况和工作环境,因此其燃油消耗和尾气排放对能源和环境的影响更加严重,不容小觑。然而,当前国内市场混凝土搅拌车仍以传统驱动方式为主,即发动机经传动系统驱动整车行驶,上装系统通过取力器、液压泵、液压马达向搅拌筒传递需求动力,且搅拌车通常较长时间工作在原地等待、装料、卸料、清洗等工况,对汽车燃油消耗和尾气排放均有极为不利的影响。当前,现有的一些专利,如专利号为CN112078472A的发明提出了一种水泥运输车辆搅拌系统,该发明取缔了传统上装的液压驱动装置,而通过在上装取力器后加装发电机及两套并行的动力电池和驱动电机来驱动搅拌筒转动,取消了车辆驻车时发动机的长时怠速作业,节能环保、减少噪声,但该发明仅为上装系统的节能方案,发动机与车轮端机械耦合,发动机转速点不可调节,且动力电池能量主要靠发动机发电和外接电网来补充,同时未考虑整车和搅拌筒制动能量地回收,对新增电驱系统及储能装置的潜能发掘还不够充分,节油效果和排放特性均未得到显著地提升。
发明内容
本发明主要解决的技术问题是克服现有技术缺陷,提供了一种节能混凝土搅拌车驱动系统及其控制方法,本发明取缔了传统混凝土搅拌车的液压驱动和纯机械驱动装置,上装驱动系统、整车驱动系统均采用驱动电机分别对搅拌筒、整车进行驱动,两驱动电机共用一套动力电池系统,进而提高发动机工作效率同时实现制动能量回收,从而有效地解决了背景技术中的问题。
为解决以上技术问题,本发明是采用如下技术方案实现的:
一种节能混凝土搅拌车驱动系统,包括发动机、发电机、整车驱动电机、变速机构、主减速器及差速器、动力电池、逆变器、上装驱动电机、减速机、搅拌筒,所述发动机与发电机转子轴机械连接,所述发电机与1号逆变器电路连接,所述整车驱动电机与2号逆变器电路连接,所述上装驱动电机与3号逆变器电路连接,所述逆变器与动力电池电路连接,所述整车驱动电机与变速机构的输入轴机械连接,所述变速机构的输出轴与主减速器及差速器机械连接,所述上装驱动电机转子轴与减速机机械连接,所述减速机与搅拌筒机械连接。
所述搅拌车整车驱动系统为串联构型混合动力系统,所述上装驱动系统为由所述上装驱动电机驱动的电动上装系统。
所述整车驱动系统和所述上装驱动系统共用一套动力电池系统。
所述上装驱动电机、所述整车驱动电机由相应的电机控制器进行控制。
根据本发明所述的一种节能混凝土搅拌车驱动系统提出其控制方法,包括节能混凝土搅拌车驻车控制方法:
1)当节能混凝土搅拌车进行驻车装料、卸料、清洗或运输短时停车等作业时,若动力电池SOC高于设定放电最低阈值,运行纯电模式,此时发动机关闭,动力电池经逆变器向上装驱动电机提供电能,进而电机控制器控制上装驱动电机输出动力,经减速机减速增扭驱动搅拌筒以需求转向、转速、转矩转动;
2)当节能混凝土搅拌车进行驻车装料、卸料、清洗或运输短时停车等作业时,若动力电池SOC低于设定放电最低阈值,运行驻车充电模式,此时发动机起动并工作在最低燃油消耗点,且输出机械能经发电机转化为电能,部分电能用于直接驱动上装驱动电机,电机控制器控制上装驱动电机输出动力,经减速机减速增扭驱动搅拌筒以需求转向、转速、转矩转动,而其余能量则经逆变器储存在动力电池中;
3)当节能混凝土搅拌车进行驻车作业且搅拌筒正制动或减速转动时,若动力电池SOC低于设定充电最高阈值,且搅拌筒减速需求扭矩大于搅拌筒转动阻力矩,运行上装再生制动模式,此时搅拌筒部分制动能量经减速机传至上装驱动电机,上装驱动电机工作在发电机模式并将机械能转化为电能,再经逆变器储存在动力电池中;
4)当节能混凝土搅拌车进行驻车作业且搅拌筒正制动或减速转动时,若动力电池SOC高于或等于设定充电最高阈值,且搅拌筒减速需求扭矩大于搅拌筒转动阻力矩,运行上装机械制动模式,此时搅拌筒制动力仅由机械制动装置提供。
根据本发明所述的一种节能混凝土搅拌车驱动系统提出其控制方法,还包括节能混凝土搅拌车行车控制方法:
1)当节能混凝土搅拌车进行运输、返程等行车作业时,若动力电池SOC高于设定放电最低阈值,运行纯电模式,此时发动机关闭,在搅拌筒转动时,动力电池经逆变器向整车驱动电机、上装驱动电机同时提供电能,一部分电能经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶,另一部分电能则经上装驱动电机转化为机械能并经减速机驱动搅拌筒转动;在搅拌筒停转时,动力电池经逆变器仅向整车驱动电机提供电能,电能全部经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶;
2)当节能混凝土搅拌车进行运输、返程等行车作业时,若动力电池SOC低于设定放电最低阈值,运行行车充电模式,此时发动机起动且始终工作在最低燃油消耗点,在搅拌筒转动时,发动机输出机械能经发电机转化为电能,部分电能用于直接驱动上装驱动电机,上装驱动电机输出动力经减速机减速增扭进而驱动搅拌筒转动,部分电能用于驱动整车驱动电机,电能经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶,若发电机输出电能有余,则剩余能量经逆变器储存在动力电池中,若发电机输出电能不足以驱动整车与搅拌筒正常工作,且动力电池SOC不低于极限放电下限值,则由动力电池继续放电补充驱动能量,以满足整车及搅拌筒正常工作需求;在搅拌筒停转时,发动机输出机械能经发电机转化为电能,部分电能用于直接驱动整车驱动电机,电能经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶,若发电机输出电能有余,则剩余能量经逆变器储存在动力电池中,若发电机输出电能不足以驱动整车正常行驶,且动力电池SOC不低于极限放电下限值,则由动力电池继续放电补充驱动能量,以满足整车正常行驶需求;
3)当节能混凝土搅拌车进行运输、返程等行车作业且车辆制动减速时,搅拌筒转动工况固定,若动力电池SOC低于设定充电最高阈值,运行行车再生制动模式,此时整车制动力由整车驱动电机提供,制动能量经差速器及主减速器、变速机构传至整车驱动电机,整车驱动电机工作在发电机模式并将机械能转化为电能,再经逆变器储存在动力电池中;
4)当节能混凝土搅拌车进行运输、返程等行车作业且车辆制动减速时,搅拌筒转动工况固定,若动力电池SOC高于或等于设定充电最高阈值,运行行车机械制动模式,此时整车制动力仅由机械制动装置提供。
与现有技术相比本发明的有益效果是:
(1)本发明所述的一种节能混凝土搅拌车驱动系统取缔了传统混凝土搅拌车的液压驱动和纯机械驱动装置,上装驱动系统、整车驱动系统均采用电力驱动,且两驱动电机共用一套动力电池系统,构型简单,同时混凝土搅拌车多用于城市作业,本发明所述的驱动系统在纯电动模式工作时可大幅降低工作噪声,减少噪声污染。
(2)本发明所述的一种节能混凝土搅拌车驱动系统取消了车辆在驻车装料、卸料、清洗或运输短时停车等作业下发动机怠速、低速、低负荷的高燃油消耗率工作点的工作,此时以纯电动驱动模式为主,此外可实现车辆运输、返程工作时发动机与车轮的完全解耦,发动机可以恒温器控制策略始终工作在最低燃油消耗点,进而有效提升发动机热效率,减小发动机能量损耗,改善车辆排放特性。
(3)本发明所述的一种节能混凝土搅拌车驱动系统所用于搅拌车多在城市完成运输作业,存在大量起停和加减速工况,而本发明可实现车辆或搅拌筒制动时部分制动能量的有效回收,以此补偿动力电池能量损耗,进而进一步降低发动机燃油消耗,提升混凝土搅拌车经济性。
附图说明
下面结合附图对本发明做进一步的说明:
图1为本发明所述的一种节能混凝土搅拌车驱动系统的结构原理图;
图2为本发明所述的一种节能混凝土搅拌车驱动系统的不同驱动模式切换规则示意图;
图3为本发明所述的一种节能混凝土搅拌车驱动系统在车辆驻车时纯电动模式下的能量传递路径图;
图4为本发明所述的一种节能混凝土搅拌车驱动系统在车辆驻车时驻车充电模式下的能量传递路径图;
图5为本发明所述的一种节能混凝土搅拌车驱动系统在车辆驻车时上装再生制动模式下的能量传递路径图;
图6为本发明所述的一种节能混凝土搅拌车驱动系统在车辆行驶时纯电动模式下的能量传递路径图;
图7为本发明所述的一种节能混凝土搅拌车驱动系统在车辆行驶时行车充电模式下的能量传递路径图;
图8为本发明所述的一种节能混凝土搅拌车驱动系统在车辆行驶时行车再生制动模式下的能量传递路径图;
图中标号说明:1-发动机,2-发电机,3-整车驱动电机,4-变速机构,5-主减速器及差速器,6-动力电池,7-逆变器,8-上装驱动电机,9-减速机,10-搅拌筒。
具体实施方式
下面详细描述本发明的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的符号表示相同或类似的物理量或具有相同或类似意义的物理量。下面通过参考附图描述的实施例是示例性的,仅用于解释本发明,而不能理解为对本发明的限制。
在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语“相连”、“连接”应做广义理解,例如,可以是固定连接,一体地连接,也可以是可拆卸连接;可以是机械连接,也可以是两个元件内部的连通;可以是直接相连,也可以通过中间媒介间接相连,对于本领域的普通技术人员而言,可以根据具体情况理解上述术语的具体含义。
参阅图1,本发明提供了一种节能混凝土搅拌车驱动系统及其控制方法,所述的混凝土搅拌车上装混合驱动系统包括发动机1、发电机2、整车驱动电机3、变速机构4、主减速器及差速器5、动力电池6、逆变器7、上装驱动电机8、减速机9、搅拌筒10,所述发动机1与发电机2转子轴机械连接,所述发电机2与1号逆变器电路连接,所述整车驱动电机与2号逆变器电路连接,所述上装驱动电机与3号逆变器电路连接,所述逆变器7与动力电池6电路连接,所述整车驱动电机3与变速机构4的输入轴机械连接,所述变速机构4的输出轴与主减速器及差速器5机械连接,所述上装驱动电机8转子轴与减速机9机械连接,所述减速机9与搅拌筒10机械连接。
所述搅拌车整车驱动系统为串联构型混合动力系统,所述上装驱动系统为由所述上装驱动电机8驱动的电动上装系统。
所述整车驱动系统和所述上装驱动系统共用一套动力电池系统6。
所述上装驱动电机8、所述整车驱动电机3由相应的电机控制器进行控制。
参阅图2,根据本发明所述的一种节能混凝土搅拌车驱动系统提出其控制方法,包括节能混凝土搅拌车驻车控制方法:
1)当节能混凝土搅拌车进行驻车装料、卸料、清洗或运输短时停车等作业时,若动力电池6SOC高于设定放电最低阈值,运行纯电模式,该模式下的能量传递路径如图3所示,此时发动机1关闭,动力电池6经逆变器7向上装驱动电机8提供电能,进而电机控制器控制上装驱动电机8输出动力,经减速机9减速增扭驱动搅拌筒10以需求转向、转速、转矩转动;
2)当节能混凝土搅拌车进行驻车装料、卸料、清洗或运输短时停车等作业时,若动力电池6SOC低于设定放电最低阈值,运行驻车充电模式,该模式下的能量传递路径如图4所示,此时发动机1起动并工作在最低燃油消耗点,且输出机械能经发电机2转化为电能,部分电能用于直接驱动上装驱动电机8,电机控制器控制上装驱动电机8输出动力,经减速机9减速增扭驱动搅拌筒10以需求转向、转速、转矩转动,而其余能量则经逆变器7储存在动力电池6中;
3)当节能混凝土搅拌车进行驻车作业且搅拌筒10正制动或减速转动时,若动力电池6SOC低于设定充电最高阈值,且搅拌筒减速需求扭矩大于搅拌筒转动阻力矩,运行上装再生制动模式,该模式下的能量传递路径如图5所示,此时搅拌筒10部分制动能量经减速机9传至上装驱动电机8,上装驱动电机8工作在发电机模式并将机械能转化为电能,再经逆变器7储存在动力电池6中;
4)当节能混凝土搅拌车进行驻车作业且搅拌筒10正制动或减速转动时,若动力电池6SOC高于或等于设定充电最高阈值,且搅拌筒减速需求扭矩大于搅拌筒转动阻力矩,运行上装机械制动模式,此时搅拌筒10制动力仅由机械制动装置提供。
参阅图2,根据本发明所述的一种节能混凝土搅拌车驱动系统提出其控制方法,还包括节能混凝土搅拌车行车控制方法:
1)当节能混凝土搅拌车进行运输、返程等行车作业时,若动力电池6SOC高于设定放电最低阈值,运行纯电模式,该模式下的能量传递路径如图6所示,此时发动机1关闭,在搅拌筒10转动时,动力电池6经逆变器7向整车驱动电机3、上装驱动电机8同时提供电能,一部分电能经整车驱动电机3转化为机械能并经变速机构4、主减速器及差速器5驱动整车正常行驶,另一部分电能则经上装驱动电机8转化为机械能并经减速机9驱动搅拌筒10转动;在搅拌筒10停转时,动力电池6经逆变器7仅向整车驱动电机3提供电能,电能全部经整车驱动电机3转化为机械能并经变速机构4、主减速器及差速器5驱动整车正常行驶;
2)当节能混凝土搅拌车进行运输、返程等行车作业时,若动力电池6SOC低于设定放电最低阈值,运行行车充电模式,该模式下的能量传递路径如图7所示,此时发动机1起动且始终工作在最低燃油消耗点,在搅拌筒10转动时,发动机1输出机械能经发电机2转化为电能,部分电能用于直接驱动上装驱动电机8,上装驱动电机8输出动力经减速机9减速增扭进而驱动搅拌筒10转动,部分电能用于驱动整车驱动电机3,电能经整车驱动电机3转化为机械能并经变速机构4、主减速器及差速器5驱动整车正常行驶,若发电机2输出电能有余,则剩余能量经逆变器7储存在动力电池6中,如图中路径A,若发电机2输出电能不足以驱动整车与搅拌筒正常工作,且动力电池6SOC不低于极限放电下限值,则由动力电池6继续放电补充驱动能量,以满足整车及搅拌筒正常工作需求,如图中路径B;在搅拌筒10停转时,发动机1输出机械能经发电机2转化为电能,部分电能用于直接驱动整车驱动电机3,电能经整车驱动电机3转化为机械能并经变速机构4、主减速器及差速器5驱动整车正常行驶,若发电机3输出电能有余,则剩余能量经逆变器7储存在动力电池6中,如图中路径A,若发电机3输出电能不足以驱动整车正常行驶,且动力电池6SOC不低于极限放电下限值,则由动力电池6继续放电补充驱动能量,以满足整车正常行驶需求,如图中路径B;
3)当节能混凝土搅拌车进行运输、返程等行车作业且车辆制动减速时,搅拌筒10转动工况固定,若动力电池6SOC低于设定充电最高阈值,运行行车再生制动模式,该模式下的能量传递路径如图8所示,此时整车制动力由整车驱动电机3提供,制动能量经差速器及主减速器5、变速机构4传至整车驱动电机3,整车驱动电机3工作在发电机模式并将机械能转化为电能,再经逆变器7储存在动力电池6中;
4)当节能混凝土搅拌车进行运输、返程等行车作业且车辆制动减速时,搅拌筒10转动工况固定,若动力电池6SOC高于或等于设定充电最高阈值,运行行车机械制动模式,此时整车制动力仅由机械制动装置提供。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (6)
1.一种节能混凝土搅拌车驱动系统,其特征在于,包括发动机、发电机、整车驱动电机、变速机构、主减速器及差速器、动力电池、逆变器、上装驱动电机、减速机、搅拌筒,所述发动机与发电机转子轴机械连接,所述发电机与1号逆变器电路连接,所述整车驱动电机与2号逆变器电路连接,所述上装驱动电机与3号逆变器电路连接,所述逆变器与动力电池电路连接,所述整车驱动电机与变速机构的输入轴机械连接,所述变速机构的输出轴与主减速器及差速器机械连接,所述上装驱动电机转子轴与减速机机械连接,所述减速机与搅拌筒机械连接。
2.根据权利要求1所述的一种节能混凝土搅拌车驱动系统,其特征在于,所述搅拌车整车驱动系统为串联构型混合动力系统,所述上装驱动系统为由所述上装驱动电机驱动的电动上装系统。
3.根据权利要求1或2所述的一种节能混凝土搅拌车驱动系统,其特征在于,所述整车驱动系统和所述上装驱动系统共用一套动力电池系统。
4.根据权利要求1或2所述的一种节能混凝土搅拌车驱动系统,其特征在于,所述上装驱动电机、所述整车驱动电机由相应的电机控制器进行控制。
5.基于权利要求1-4所述的任一种节能混凝土搅拌车驱动系统的控制方法,其特征在于,包括节能混凝土搅拌车驻车控制方法:
1)当节能混凝土搅拌车进行驻车装料、卸料、清洗或运输短时停车等作业时,若动力电池SOC高于设定放电最低阈值,运行纯电模式,此时发动机关闭,动力电池经逆变器向上装驱动电机提供电能,进而电机控制器控制上装驱动电机输出动力,经减速机减速增扭驱动搅拌筒以需求转向、转速、转矩转动;
2)当节能混凝土搅拌车进行驻车装料、卸料、清洗或运输短时停车等作业时,若动力电池SOC低于设定放电最低阈值,运行驻车充电模式,此时发动机起动并工作在最低燃油消耗点,且输出机械能经发电机转化为电能,部分电能用于直接驱动上装驱动电机,电机控制器控制上装驱动电机输出动力,经减速机减速增扭驱动搅拌筒以需求转向、转速、转矩转动,而其余能量则经逆变器储存在动力电池中;
3)当节能混凝土搅拌车进行驻车作业且搅拌筒正制动或减速转动时,若动力电池SOC低于设定充电最高阈值,且搅拌筒减速需求扭矩大于搅拌筒转动阻力矩,运行上装再生制动模式,此时搅拌筒部分制动能量经减速机传至上装驱动电机,上装驱动电机工作在发电机模式并将机械能转化为电能,再经逆变器储存在动力电池中;
4)当节能混凝土搅拌车进行驻车作业且搅拌筒正制动或减速转动时,若动力电池SOC高于或等于设定充电最高阈值,且搅拌筒减速需求扭矩大于搅拌筒转动阻力矩,运行上装机械制动模式,此时搅拌筒制动力仅由机械制动装置提供。
6.基于权利要求5所述的一种节能混凝土搅拌车驱动系统的控制方法,其特征在于,还包括节能混凝土搅拌车行车控制方法:
1)当节能混凝土搅拌车进行运输、返程等行车作业时,若动力电池SOC高于设定放电最低阈值,运行纯电模式,此时发动机关闭,在搅拌筒转动时,动力电池经逆变器向整车驱动电机、上装驱动电机同时提供电能,一部分电能经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶,另一部分电能则经上装驱动电机转化为机械能并经减速机驱动搅拌筒转动;在搅拌筒停转时,动力电池经逆变器仅向整车驱动电机提供电能,电能全部经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶;
2)当节能混凝土搅拌车进行运输、返程等行车作业时,若动力电池SOC低于设定放电最低阈值,运行行车充电模式,此时发动机起动且始终工作在最低燃油消耗点,在搅拌筒转动时,发动机输出机械能经发电机转化为电能,部分电能用于直接驱动上装驱动电机,上装驱动电机输出动力经减速机减速增扭进而驱动搅拌筒转动,部分电能用于驱动整车驱动电机,电能经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶,若发电机输出电能有余,则剩余能量经逆变器储存在动力电池中,若发电机输出电能不足以驱动整车与搅拌筒正常工作,且动力电池SOC不低于极限放电下限值,则由动力电池继续放电补充驱动能量,以满足整车及搅拌筒正常工作需求;在搅拌筒停转时,发动机输出机械能经发电机转化为电能,部分电能用于直接驱动整车驱动电机,电能经整车驱动电机转化为机械能并经变速机构、主减速器及差速器驱动整车正常行驶,若发电机输出电能有余,则剩余能量经逆变器储存在动力电池中,若发电机输出电能不足以驱动整车正常行驶,且动力电池SOC不低于极限放电下限值,则由动力电池继续放电补充驱动能量,以满足整车正常行驶需求;
3)当节能混凝土搅拌车进行运输、返程等行车作业且车辆制动减速时,搅拌筒转动工况固定,若动力电池SOC低于设定充电最高阈值,运行行车再生制动模式,此时整车制动力由整车驱动电机提供,制动能量经差速器及主减速器、变速机构传至整车驱动电机,整车驱动电机工作在发电机模式并将机械能转化为电能,再经逆变器储存在动力电池中;
4)当节能混凝土搅拌车进行运输、返程等行车作业且车辆制动减速时,搅拌筒转动工况固定,若动力电池SOC高于或等于设定充电最高阈值,运行行车机械制动模式,此时整车制动力仅由机械制动装置提供。
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