CN107585010A - 环保车辆的后轮驱动装置 - Google Patents

环保车辆的后轮驱动装置 Download PDF

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CN107585010A
CN107585010A CN201710546725.4A CN201710546725A CN107585010A CN 107585010 A CN107585010 A CN 107585010A CN 201710546725 A CN201710546725 A CN 201710546725A CN 107585010 A CN107585010 A CN 107585010A
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mentioned
motor
trailing wheel
vehicle
control unit
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Granted
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CN107585010B (zh
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郑晞天
金根镐
李相技
禹文植
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Hyundai Transys Inc
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Hyundai Dymos Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/02Control of vehicle driving stability
    • B60W30/045Improving turning performance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
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    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
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    • B60K6/42Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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    • B60K7/00Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/746Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10S903/945Characterized by control of gearing, e.g. control of transmission ratio

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

本发明涉及环保车辆的后轮驱动装置,包括:后轮驱动部,包括用于分别驱动第一后轮和第二后轮的第一马达和第二马达;后轮减速部,分别对第一马达和第二马达的驱动力进行减速,来分别向第一后轮及第二后轮传递;制动器,用于以可相对于车身进行解除的方式固定后轮减速部;以及控制部,用于控制后轮驱动部、后轮减速部及制动器,后轮减速部包括:第一行星齿轮组,配置于第一马达的输出端与第一后轮之间;第二行星齿轮组,配置于第二马达的输出端与第二后轮之间;以及环形齿轮,两侧分别与第一行星齿轮组和第二行星齿轮组相结合。因此,借助分别在后轮两侧设置的马达的动力来进行独立驱动,从而具有不仅可提高车辆的纵向驱动力,而且还可提高如紧急方向转换或车道变更等的车辆的操纵稳定性的效果。

Description

环保车辆的后轮驱动装置
技术领域
本发明涉及环保车辆的后轮驱动装置,更详细地,涉及如下的环保车辆的后轮驱动装置,即,通过分别在车辆的后轮两侧设置驱动马达,来可分别驱动车辆的后轮两侧,并独立控制各个驱动马达,从而不仅可提高车辆的纵向驱动力,而且还可提高车辆的操纵稳定性。
背景技术
为了对现有的前轮驱动方式的环保车辆实现四轮驱动,即,为了对混合动力汽车(HEV,Hybrid Electric Vehicle)、插电式混合动力汽车(PHEV,Plug-in Hybrid ElectricVehicle)、电动车(EV,Electric Vehicle)及氢燃料电池车辆等实现四轮驱动,在后轮车轴装载马达和减速器组合而成的驱动装置来提高四轮驱动车辆的行驶能力、确保在雪地等路面上的车辆的稳定性。
上述现有的后轮驱动装置包括:驱动马达,以常规高电压驱动;减速装置,用于确保车辆的最终减速比;以及离合器或制动器,以用于去除高速情况下的不必要的马达旋转阻力的湿式多片摩擦材料作为单元。
另一方面,韩国公开专利公报第10-2013-0005407号公开了利用用于后轮驱动的单驱动马达、对单驱动马达进行减速的行星齿轮组、与行星齿轮组的输出端相连接的差动齿轮来实现环保车辆的四轮驱动的技术。
然而,与常规的四轮驱动车辆相同,记载于上述文献的结构限定在用于提高前轮及后轮的纵向驱动力的控制方面。
因此,如上所述的利用单驱动马达来驱动后轮的方式存在如下问题,即,如同在行驶过程中需紧急变更车道的情况,在需要单独控制两侧后轮的驱动力的情况下,无法对车辆的操纵稳定性起到作用。
现有技术文献
专利文献
专利文献1:韩国公开专利公报第10-2013-0005407号
发明内容
因此,为了解决如上所述的问题而提出本发明,本发明的目的在于提供如下的环保车辆的后轮驱动装置,即,为了分别独立驱动两侧后轮,通过利用多个驱动马达来不仅可提高车辆的纵向驱动力,而且可提高车辆的操纵稳定性。
用于实现如上所述的目的的本发明提供环保车辆的后轮驱动装置,用于分别独立驱动车辆的第一后轮及第二后轮,其特征在于,包括:后轮驱动部,包括驱动上述第一后轮的第一马达和驱动上述第二后轮的第二马达;后轮减速部,对上述第一马达的驱动力及上述第二马达的驱动力进行减速,来分别向上述第一后轮及上述第二后轮传递;制动器,以能够相对于车身进行解除的方式固定上述后轮减速部;以及控制部,用于控制上述后轮驱动部、上述后轮减速部及上述制动器,以能够分别独立驱动上述第一后轮和上述第二后轮,上述后轮减速部包括:第一行星齿轮组,配置于上述第一马达的输出端与上述第一后轮之间;第二行星齿轮组,配置于上述第二马达的输出端与上述第二后轮之间;以及环形齿轮,两侧分别与上述第一行星齿轮组和上述第二行星齿轮组相结合。
并且,优选地,上述制动器设置于上述环形齿轮与上述车身之间,来使上述环形齿轮以可解除的方式固定于车身。
并且,优选地,上述第一行星齿轮组包括:第一托架,与上述第一马达的输出端相连接;第一中心齿轮,与上述第一后轮相连接;以及多个第一行星齿轮,与上述第一中心齿轮的外周面和上述环形齿轮的内周面啮合来旋转,上述第二行星齿轮组包括:第二托架,与上述第二马达的输出端相连接;第二中心齿轮,与上述第二后轮相连接;以及多个第二行星齿轮,与上述第二中心齿轮的外周面和上述环形齿轮的内周面啮合来旋转。
并且,优选地,上述控制部包括:马达控制单元,向上述第一马达和上述第二马达分别独立供给驱动电力来工作;液压控制部,通过生成液压来向上述制动器供给;以及车辆控制单元,与上述马达控制单元和上述液压控制部电连接,控制上述马达控制单元的工作及上述液压控制部的工作。
并且,上述第一后轮相当于左侧后轮,上述第二后轮相当于右侧后轮。
并且,优选地,若在车辆的行驶过程中检测到驾驶人员要向相对于车辆的行驶方向的左侧急转换的意志,则上述车辆控制单元在计算车辆的旋转力矩之后,向上述马达控制单元传送用于向驱动上述第二后轮的上述第二马达供电的控制信号,向上述马达控制单元传送用于向驱动上述第一后轮的上述第一马达不供电的控制信号。
并且,优选地,上述车辆控制单元以利用上述第一马达来从上述第一后轮回收能量的方式控制上述马达控制单元。
并且,优选地,若在车辆的行驶过程中检测到驾驶人员要向相对于车辆的行驶方向的右侧急转换的意志,则上述车辆控制单元在计算车辆的旋转力矩之后,向上述马达控制单元传送用于向驱动上述第一后轮的上述第一马达供电的控制信号,向上述马达控制单元传送用于向驱动上述第二后轮的上述第二马达不供电的控制信号。
并且,优选地,上述车辆控制单元以利用上述第二马达来从上述第二后轮回收能量的方式控制上述马达控制单元。
根据本发明,借助分别在后轮两侧设置的马达的动力来进行独立驱动,从而具有不仅可提高车辆的纵向驱动力,而且还可提高如紧急的方向转换或车道变更等的车辆的操纵稳定性的效果。
附图说明
图1为用于说明具有本发明一实施例的后轮驱动装置的环保车辆的图。
图2为示出本发明一实施例的后轮驱动装置中的后轮驱动部和后轮减速部的图。
图3为示出图2中的后轮驱动装置中的液压控制部的图。
图4为用于说明图2中的后轮驱动装置的作用的图。
附图标记的说明
10:前轮
20:前轮驱动装置
21:前轮驱动部
22:变速部
50:后轮
100:后轮驱动装置
110:后轮驱动部
111:第一马达
111a:第一转子
111b:第一转子轴
111c:定子
112:第二马达
112a:第二转子
112b:第二转子轴
112c:定子
120:后轮减速部
121:第一行星齿轮组
121a:第一托架
121b:第一中心齿轮
121c:第一行星齿轮
122:第二行星齿轮组
122a:第二托架
122b:第二中心齿轮
122c:第二行星齿轮
123:环形齿轮
130:制动器
150:控制部
151:马达控制单元
152:液压控制部
152a:液压泵
152b:泵驱动马达
152c:液压阀
152d:液压控制单元
152e:工作油储存部
153:车辆控制单元
具体实施方式
参照附图对本发明的具体实施例进行说明。在这一过程中,附图所示的线的厚度或结构要素的大小等可以为了说明的明确性和方便而以夸张的方式示出。并且,后述的术语是考虑到在本发明中的功能而定义的,可根据使用人员、运用人员的意图或惯例而有所不同。因此,对这种术语的定义应基于本说明书整体的内容来定义。
作为参考,图1为用于说明具有本发明一实施例的后轮驱动装置的环保车辆的结构的图,图2为示出本发明一实施例的后轮驱动装置中的后轮驱动部和后轮减速部的图。图3为示出图2中的后轮驱动装置中的液压控制部的图,图4为用于说明图2中的后轮驱动装置的作用的图。
首先,如图1所示,车辆包括:前轮驱动装置20,用于驱动前轮10;以及后轮驱动装置100,用于驱动后轮50。
前轮驱动装置20的目的在于仅驱动前轮10,前轮驱动装置20的动力不向后轮50传递。
根据车辆的形式及驱动方式,前轮驱动装置20包括:前轮驱动部21,属于常规的内燃发动机或电动马达,或者包括全部;以及变速部22,通过对前轮驱动部21的动力进行减速来向前轮10传递。
前轮驱动装置20的前轮驱动部21和变速部22借助后述的车辆控制单元153来控制工作。
另一方面,后轮驱动装置100的目的在于仅驱动后轮50,后轮驱动装置100的动力不向前轮驱动装置20传递。
本发明一实施例的后轮驱动装置100包括:后轮驱动部110,分别独立驱动两侧后轮50;以及后轮减速部120,通过独立减速后轮驱动部110的驱动力来向两侧后轮50传递。
后轮驱动部110包括:第一马达111,独立驱动第一后轮51;第二马达112,独立驱动第二后轮52,后轮减速部120设置有用于分别对第一马达111的驱动力和第二马达112的驱动力独立进行减速的单元。
参照图2,对这些后轮驱动部110和后轮减速部120的详细结构进行说明。
另一方面,如图1所示,本发明一实施例的环保车辆包括控制部150,上述控制部150用于以分别独立驱动控制后轮驱动部110的第一马达111和第二马达112或独立再生控制的方式控制后轮驱动部110和后轮减速部120。
如图所示,控制部150包括:马达控制单元151,向第一马达111和第二马达112分别独立供给驱动电力;液压控制部152,通过生成液压来向后轮减速部120供给;以及车辆控制单元153,与马达控制单元151和液压控制部152电连接,控制马达控制单元151的工作及液压控制部152的工作。
马达控制单元151为根据后述的车辆控制单元153的控制信号来将储存于电池的高电压的电力通过高电压线向第一马达111和第二马达112同时或选择性地供给,或可从第一马达111及第二马达112回收能量来独立地驱动控制或再生控制第一马达111和第二马达112。
马达控制单元151通过马达控制线来分别与第一马达111及第二马达112电连接,通过通信线来与车辆控制单元153电连接。
其中,在马达控制单元151中,可向第一马达111和第二马达112选择性地供电的结构可通过将本领域公知的方法适用于本发明的一实施例来实现,从而省略对马达控制单元151的详细结构的说明。
如后所述,液压控制部152为用于控制借助液压来工作的后轮减速部120的各结构的结构,更详细地,根据车辆控制单元153的控制信号来向制动器130选择性地供给,从而控制后轮减速部120。
液压控制部152通过通信线来与车辆控制单元153电连接并通过液压线来与后轮减速部120的制动器130相连接。
参照图3,对这种液压控制部152的详细结构进行说明。
车辆控制单元153起到对上述前轮驱动部21的工作及后轮驱动部110和后轮减速部120的工作进行控制的作用。其中,车辆控制单元153执行与常规的发动机控制单元(ECU)类似的功能,然而,由于总体控制前轮驱动部21的工作和后轮驱动部110的工作,因此属于比起发动机控制单元意义更广的概念。
车辆控制单元153接收通过变速杆、油门及方向盘输入的驾驶人员的意图,以及通过通信线与安装于车辆的各种传感器电连接来从多个传感器接收车辆的信息,以所接收的信息为基础,考虑车辆的燃油费及效率、姿势稳定性来控制前轮驱动部21及后轮驱动部110的工作及驱动力的分配。
其中,若在车辆的高速行驶过程中接收驾驶人员要向相对于车辆的行驶方向的某一方向(例如,右侧)急转换的意志,则车辆控制单元153在计算车辆的旋转力矩之后,向马达控制单元151传送用于向驱动两侧后轮中的车辆转弯的相反方向(左侧后轮)的后轮的马达(第一马达)供电的控制信号,向马达控制单元151传送用于向驱动车辆转弯的方向的后轮(右侧后轮)的马达(第二马达)不供电的控制信号。
图2示出本发明一实施例的后轮驱动装置100中的后轮驱动部110和后轮减速部120的结构图。
如上所述,后轮驱动部110包括:第一马达111,用于独立驱动第一后轮51;第二马达112,用于独立驱动第二后轮52。
第一马达111的定子111c和第二马达112的定子112c分别固定于车身,作为第一马达111的第一转子111a输出端的第一转子轴111b与后述的第一行星齿轮组121的第一托架121a相连接,作为第二马达112的第二转子112a输出端的第二转子轴112b与后述的第二行星齿轮组122的第二托架122a相连接。
其中,第一马达111和第二马达112只要能够向第一后轮51及第二后轮52分别提供所需的驱动力,则无种类和形式上的限制,可使用本领域公知的电动马达。
但是,在本发明一实施例的后轮驱动装置100中的第一马达111和第二马达112以可分别被独立驱动的方式由马达控制单元151控制。
第一后轮51和第一马达111以示出的实施例为基准来配置于车辆前方的左侧,第二后轮52和第二马达112配置于车辆前方的右侧,但不限定于此。
另一方面,如图2所示,后轮减速部120包括:第一行星齿轮组121,配置于作为第一马达111的输出端的第一转子轴111b与第一后轮51之间;第二行星齿轮组122,配置于作为第二马达112的输出端的第二转子轴112b与第二后轮52之间;以及环形齿轮123,两侧分别与第一行星齿轮组121和第二行星齿轮组122齿轮结合。
第一行星齿轮组121包括:第一托架121a,与第一马达111的输出端相连接;第一中心齿轮121b,与上述第一后轮51相连接;以及多个第一行星齿轮121c,与第一中心齿轮121b的外周面和环形齿轮123的内周面啮合来旋转。上述第二行星齿轮组122包括:第二托架122a,与第二马达112的输出端相连接;第二中心齿轮122b,与上述第二后轮52相连接;以及多个第二行星齿轮122c,与第二中心齿轮122b的外周面和环形齿轮123的内周面啮合来旋转。
环形齿轮123借助液压式工作的制动器130来以可解除的方式固定于车身。其环形齿轮123呈两端部开放的圆筒管形状,其两端部分别与第一行星齿轮组121的第一中心齿轮121b和第二行星齿轮组122的第二中心齿轮122b齿轮结合。
因此,当驱动第一马达111及第二马达112时,分别相当于输出端的第一转子轴111b和第二转子轴112b以分别与第一托架121a和第二托架122a相连接的状态,分别向第一托架121a和第二托架122a传递第一马达111的驱动力和第二马达112的驱动力。
此后,由于第一后轮51和第二后轮52分别与第一中心齿轮121b和第二中心齿轮122b直接连接,因此分别减速的驱动力通过第一中心齿轮121b和第二中心齿轮122b来直接向第一后轮51和第二后轮52传递。
液压控制部152包括:液压泵152a,对工作油进行加压;泵驱动马达152b,用于驱动液压泵152a;液压阀152c,向制动器130供给加压的工作油;以及液压控制单元152d,用于控制泵驱动马达152b的工作及液压阀152c的开闭。
液压泵152a起到在工作油储存部152e对工作油进行加压的作用,泵驱动马达152b从液压控制单元152d接收电力来被驱动,从而向液压泵152a传递动力。即,为了解除后轮与后轮驱动部之间的动力传递关系,若车辆控制单元153向液压控制单元152d施加控制信号,则液压控制单元152d向泵驱动马达152b供电来运行液压泵152a。
对如上所述的本发明一实施例的环保车辆的后轮驱动装置的作用进行简略说明。
首先,车辆控制单元153接收通过变速杆、油门及方向盘输入的驾驶人员的意图,以及通过通信线与安装于车辆的各种传感器电连接来从多个传感器接收车辆的信息,以所接收的信息为基础,考虑车辆的燃油费及效率、姿势稳定性来控制前轮驱动部21及后轮驱动部110的工作及驱动力的分配。
更详细地,在通常的行驶情况下,本发明一实施例的车辆控制单元153以与通常的电动车或混合动力汽车类似的方式考虑车辆的效率,在车辆的工作或低速行驶的情况下,以仅利用后轮驱动部110来驱动后轮的方式控制前轮驱动部21和后轮驱动部110。即,车辆控制单元153控制前轮驱动部21和后轮驱动部110来仅驱动后轮50。
在车辆超过规定的速度的情况下,即,当高速行驶时,车辆控制单元153控制前轮驱动部21和后轮驱动部110来仅驱动前轮10。此时,通过液压控制部152将制动器130从锁定状态转换为解锁状态来防止第一马达111和第二马达112受损。
但是,即使在高速行驶的情况下,如车辆的急速的方向转换或车道变更,在需要车辆的操纵稳定性及姿势稳定性的情况下,车辆控制单元153以向未驱动的后轮50任意地传递驱动力的方式控制后轮驱动部110。
更详细地,当车辆的方向转换及车道变更时,车辆控制单元153计算用于对后轮的第一马达111和第二马达112进行最佳控制的车辆旋转力矩,计算用于生成所计算的旋转力矩的第一马达111和第二马达112的功率。此后,通过通信线向马达控制单元151传递用于使第一马达111和第二马达112以所计算的功率驱动两侧后轮50的控制信号,马达控制单元151控制后轮的第一马达111和第二马达112使它们工作。
通过这种过程,当车辆的方向转换及车道变更时,利用后轮50的第一马达111和第二马达112来分别独立地驱动两侧后轮50。
并且,如图4所示,当高速行驶时,形成车辆的方向转换时的后轮驱动部110的工作如下。
首先,在车辆的高速行驶中,若车辆控制单元153接收驾驶人员要向相对于车辆的行驶方向的右侧急转换的意志,则车辆控制单元153在综合判断上述信息来计算所需的旋转力矩之后,根据所计算的力矩,来向马达控制单元151施加用于驱动两侧后轮中的左侧后轮的控制信号,马达控制单元151向驱动左侧后轮(图4中的左侧中的左侧后轮)的第一马达111施加所需的电力,从而通过第一马达111实施左侧后轮的驱动控制。
此时,马达控制单元151以向用于驱动右侧后轮的第二马达112不供电的方式进行控制,利用第二马达112来实施从右侧后轮回收能量的再生控制。
并且,在车辆的高速行驶中,若车辆控制单元153接收驾驶人员要向相对于车辆的行驶方向的左侧急转换的意志,则车辆控制单元153在综合判断上述信息来计算所需的旋转力矩之后,根据所计算的力矩,来向马达控制单元151施加用于驱动两侧后轮中的右侧后轮的控制信号,马达控制单元151向驱动右侧后轮(图4中的右侧中的右侧后轮)的第二马达112施加所需的电力,从而通过第二马达112实施右侧后轮的驱动控制。
此时,马达控制单元151以向用于驱动左侧后轮的第一马达111不供电的方式进行控制,利用第一马达111来实施从左侧后轮回收能量的再生控制。
如上所述,参照附图所示的实施例来对本发明进行了说明,这仅是示例性的,本技术所属领域的普通技术人员能够理解可存在多种变形及等同的其他实施例。因此,本发明的实际技术保护范围应根据发明要求保护范围来决定。

Claims (9)

1.一种环保车辆的后轮驱动装置,用于分别独立驱动车辆的第一后轮及第二后轮,其特征在于,
包括:
后轮驱动部,包括驱动上述第一后轮的第一马达和驱动上述第二后轮的第二马达;
后轮减速部,对上述第一马达的驱动力及上述第二马达的驱动力进行减速,来分别向上述第一后轮及上述第二后轮传递;
制动器,以能够相对于车身进行解除的方式固定上述后轮减速部;以及
控制部,用于控制上述后轮驱动部、上述后轮减速部及上述制动器,以能够分别独立驱动上述第一后轮和上述第二后轮,
上述后轮减速部包括:
第一行星齿轮组,配置于上述第一马达的输出端与上述第一后轮之间;
第二行星齿轮组,配置于上述第二马达的输出端与上述第二后轮之间;以及
环形齿轮,两侧分别与上述第一行星齿轮组和上述第二行星齿轮组相结合。
2.根据权利要求1所述的环保车辆的后轮驱动装置,其特征在于,上述制动器设置于上述环形齿轮与上述车身之间,来使上述环形齿轮以能够解除的方式固定于车身。
3.根据权利要求1所述的环保车辆的后轮驱动装置,其特征在于,
上述第一行星齿轮组包括:
第一托架,与上述第一马达的输出端相连接;
第一中心齿轮,与上述第一后轮相连接;以及
多个第一行星齿轮,与上述第一中心齿轮的外周面和上述环形齿轮的内周面啮合来旋转,
上述第二行星齿轮组包括:
第二托架,与上述第二马达的输出端相连接;
第二中心齿轮,与上述第二后轮相连接;以及
多个第二行星齿轮,与上述第二中心齿轮的外周面和上述环形齿轮的内周面啮合来旋转。
4.根据权利要求3所述的环保车辆的后轮驱动装置,其特征在于,上述控制部包括:
马达控制单元,向上述第一马达和上述第二马达分别独立供给驱动电力来工作;
液压控制部,通过生成液压来向上述制动器供给;以及
车辆控制单元,与上述马达控制单元和上述液压控制部电连接,控制上述马达控制单元的工作及上述液压控制部的工作。
5.根据权利要求4所述的环保车辆的后轮驱动装置,其特征在于,上述第一后轮相当于左侧后轮,上述第二后轮相当于右侧后轮。
6.根据权利要求5所述的环保车辆的后轮驱动装置,其特征在于,若在车辆的行驶过程中检测到驾驶人员要向相对于车辆的行驶方向的左侧急转换的意志,则上述车辆控制单元在计算车辆的旋转力矩之后,向上述马达控制单元传送用于向驱动上述第二后轮的上述第二马达供电的控制信号,向上述马达控制单元传送用于向驱动上述第一后轮的上述第一马达不供电的控制信号。
7.根据权利要求6所述的环保车辆的后轮驱动装置,其特征在于,上述车辆控制单元以利用上述第一马达来从上述第一后轮回收能量的方式控制上述马达控制单元。
8.根据权利要求5所述的环保车辆的后轮驱动装置,其特征在于,若在车辆的行驶过程中检测到驾驶人员要向相对于车辆的行驶方向的右侧急转换的意志,则上述车辆控制单元在计算车辆的旋转力矩之后,向上述马达控制单元传送用于向驱动上述第一后轮的上述第一马达供电的控制信号,向上述马达控制单元传送用于向驱动上述第二后轮的上述第二马达不供电的控制信号。
9.根据权利要求8所述的环保车辆的后轮驱动装置,其特征在于,上述车辆控制单元以利用上述第二马达来从上述第二后轮回收能量的方式控制上述马达控制单元。
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