CN105408154A - 混合动力系统及其控制方法 - Google Patents

混合动力系统及其控制方法 Download PDF

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CN105408154A
CN105408154A CN201480041911.7A CN201480041911A CN105408154A CN 105408154 A CN105408154 A CN 105408154A CN 201480041911 A CN201480041911 A CN 201480041911A CN 105408154 A CN105408154 A CN 105408154A
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dynamotor
combustion engine
bent axle
make
changing mechanism
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岩田宪仁
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Isuzu Motors Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/42—Arrangement 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
    • B60K6/48—Parallel type
    • B60K6/485—Motor-assist type
    • 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
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • B60W10/101—Infinitely variable gearings
    • B60W10/107—Infinitely variable gearings with endless flexible members
    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/22—Arrangement 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
    • B60K6/26—Arrangement 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
    • B60K2006/268—Electric drive motor starts the engine, i.e. used as starter motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K25/00—Auxiliary drives
    • B60K25/02—Auxiliary drives directly from an engine shaft
    • B60K2025/022—Auxiliary drives directly from an engine shaft by a mechanical transmission
    • B60K2025/024—Auxiliary drives directly from an engine shaft by a mechanical transmission with variable ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
    • F02N11/0866—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery comprising several power sources, e.g. battery and capacitor or two batteries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/08—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing being of friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N2011/0881—Components of the circuit not provided for by previous groups
    • F02N2011/0888—DC/DC converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N2011/0881—Components of the circuit not provided for by previous groups
    • F02N2011/0896—Inverters for electric machines, e.g. starter-generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N5/00—Starting apparatus having mechanical power storage
    • F02N5/04—Starting apparatus having mechanical power storage of inertia type
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Abstract

本发明提供混合动力系统及其控制方法。在具有发动机(10)和电动发电机(21)的混合动力系统(1)中，将曲轴(15)与电动发电机(21)经由能够通过曲轴用断接装置(17)而与曲轴(15)侧分离的CVT(16)连接，在产生发动机主体(11)的起动请求时，使曲轴用断接装置(17)成为断开状态，旋转驱动电动发电机(21)，使第1带轮(16a)的带轮直径成为最大，之后使电动发电机(21)停止，在使曲轴用断接装置(17)成为连接状态之后，再次旋转驱动电动发电机(21)而使发动机主体(11)进行曲轴转动。

Description

混合动力系统及其控制方法
技术领域
本发明涉及混合动力系统及其控制方法，更详细来说，涉及能够使内燃机可靠地起动的混合动力系统及其控制方法。
背景技术
近年来，从提高燃料消耗率以及环境对策等的观点出发，例如日本申请的特开2002-238105号公报(专利文献1)所记载的那样，具备内燃机和电动发电机的混合动力系统受到关注。
在该混合动力系统中，以节能化以及省空间化为目的，而提出如下提案：将以往的起动机废除，而使用经由无级变速器与内燃机连接的电动发电机使内燃机进行曲轴转动。
但是，为了使内燃机可靠地起动，需要在起动初始对曲轴赋予开始旋转所需要的大小的扭矩，但是根据无级变速器的状态而有时难以赋予。
现有技术文献
专利文献
专利文献1：日本申请的特开2002-238105号公报
发明内容
发明要解决的课题
本发明的目的在于，提供能够通过电动发电机使内燃机可靠地起动的混合动力系统及其控制方法。
用于解决课题的手段
用于实现上述目的的本发明的混合动力系统为，具有内燃机和电动发电机，其特征在于，设置有：无级变速机构，与上述内燃机的曲轴直接连结，并且将上述内燃机的动力传递至上述电动发电机；曲轴用断接装置，设置于上述曲轴，使上述内燃机与上述无级变速机构的动力传递连接或者断开；以及控制单元，对上述混合动力系统进行控制，在产生上述内燃机的起动请求时，上述控制单元使上述曲轴用断接装置成为断开状态，旋转驱动上述电动发电机，对上述无级变速机构进行控制以使从上述电动发电机朝上述曲轴的传递扭矩变大，之后使该电动发电机停止，在使上述曲轴用断接装置成为连接状态之后，旋转驱动上述电动发电机而使上述内燃机进行曲轴转动。
用于实现上述目的的本发明的混合动力系统的控制方法为，该混合动力系统具有内燃机以及电动发电机，经由与上述内燃机的曲轴直接连结的无级变速机构从上述电动发电机朝上述内燃机传递动力，上述混合动力系统的控制方法的特征在于，在产生上述内燃机的起动请求时，使上述内燃机与上述无级变速机构的动力传递断开，旋转驱动上述电动发电机，对上述无级变速机构进行控制以使从上述电动发电机朝上述曲轴的传递扭矩变大，之后使该电动发电机停止，在使上述内燃机与上述无级变速机构的动力传递连接之后，旋转驱动上述电动发电机而使上述内燃机进行曲轴转动。
发明的效果
根据本发明的混合动力系统及其控制方法，将内燃机的曲轴与电动发电机经由能够与曲轴分离的无级变速机构连接，在内燃机的起动时，将曲轴从内燃机分离，利用电动发电机对无级变速机构进行控制以使曲轴侧常时成为高扭矩状态，因此在内燃机的起动时，曲轴侧常时成为高扭矩状态，因此能够通过电动发电机使内燃机可靠地起动。
附图说明
图1是表示由本发明的实施方式形成的混合动力系统的构成的图。
图2是对由本发明的实施方式形成的混合动力系统的控制方法进行说明的流程图。
具体实施方式
以下，参照附图对本发明的实施方式进行说明。图1表示由本发明的实施方式形成的混合动力系统。
该实施方式的混合动力系统2具有发动机(内燃机)10和电动发电机(M/G)21。另外，此处，对该混合动力系统2是搭载于混合动力车辆(HEV：以下称作车辆)2的系统进行说明，但并不一定限定于此。
以经由曲轴用断接装置17与发动机主体11的曲轴15连结的方式设置CVT(无级变速机构：比例可变机构)16，并且将电动发电机21与该CVT16连结。即，构成为，在发动机10的曲轴15上经由曲轴用断接装置17直接连结CVT16的第1带轮(第1动力传递部)16a，并且在电动发电机21上设置CVT16的第2带轮(第2动力传递部)16b。并且，构成为，经由第1带轮16a和第2带轮16b进行曲轴15与电动发电机21之间的动力传递。
在这些第1带轮16a与第2带轮16b之间卷挂有环状的带或者链条(动力传递部件)16c。从曲轴15经由第1带轮16a、动力传递部件16c和第2带轮16b朝电动发电机21传递动力。此外，反之，从电动发电机21经由第2带轮16b、动力传递部件16c和第1带轮16a朝曲轴15传递动力。
在该CVT16中，通过使第1带轮16a和第2带轮16b的宽度分别变化，由此改变带轮16a、16b与动力传递部件16c相接触的径向位置。构成为，如果动力传递部件16c所接触的位置成为内侧、则带轮直径变小，反之如果成为外侧、则带轮直径变大。并且，通过利用基于电子控制的液压或者电动机构(未图示)来进行使两个带轮16a、16b的宽度的扩大缩小以相互相反的方式变化的控制，由此能够不使动力传递部件16c松弛而连续地进行变速。
曲轴用断接装置17由混合动力系统用控制装置41控制。在通过发动机10的曲轴15的动力使电动发电机21进行发电的情况、通过电动发电机21的驱动力对发动机10的驱动力进行辅助的情况下，该曲轴用断接装置17成为连接状态而进行曲轴15与电动发电机21之间的动力传递。另一方面，在不需要通过电动发电机21进行发电的情况下，曲轴用断接装置17成为断开状态而将发动机10与电动发电机21之间的动力传递切断。
电力系统20的一部分即电动发电机21为，作为发电机接受发动机10的驱动力而进行发电、或者基于车辆2产生的制动力等再生力而进行再生发电。或者，电动发电机21为，作为电动机进行驱动，将其驱动力传递至发动机10的曲轴15，对发动机10的驱动力进行辅助。
另外，进行发电而得到的电力，经由布线22由逆变器(INV)23进行转换而朝第1蓄电池(充电器：B1)24A充电。此外，在驱动电动发电机21时，将充电于第1蓄电池24A的电力由逆变器23进行转换而朝电动发电机21供给。
在图1的构成中，进一步，将DC-DC转换器(CON)25以及第2蓄电池(B2)24B与第1蓄电池24A串联设置，通过DC-DC转换器25使第1蓄电池24A的例如一般为12V、24V以上的较高电压的电力电压降至例如12V，而朝第2蓄电池24B进行充电。构成为，从该第2蓄电池24B朝辅机的冷却风扇26A、冷却水泵26B、润滑油泵26C等供给电力。
在搭载有混合动力系统1的车辆2中，发动机10的动力被传递至动力传递系统30的变速器(传动装置)31。并且，从变速器31经由推进轴(传动轴)32传递至工作装置(差速齿轮)33，并从工作装置33经由驱动轴(主动轴)34传递至车轮35。由此，发动机10的动力传递至车轮35，车辆2行驶。另外，根据发动机10的搭载方式的不同，从发动机10朝车轮35的传递路径也可以不同。
另一方面，关于电动发电机21的动力，充电于第1蓄电池24A的电力经由逆变器23供给至电动发电机21，通过该电力而电动发电机21被驱动并产生动力。该电动发电机21的动力经由CVT16传递至曲轴15，并沿着发动机10的动力传递路径传递，而传递至车轮35。
由此，电动发电机21的动力与发动机10的动力一起传递至车轮35，车辆2行驶。另外，在再生时，通过相反的路径，车轮35的再生力或者发动机10的再生力传递至电动发电机21，而能够通过电动发电机21进行发电。
此外，设置有混合动力系统用控制装置41，在监视发动机10的转速Ne、负载Q等的运转状态、电动发电机21的转速Na等的运转状态、第1蓄电池24A、第2蓄电池24B的充电容量(SOC)的状态的同时，对CVT16、电动发电机21、逆变器23、DC-DC转换器25等进行控制。该混合动力系统用控制装置41通常构成为，组装于对发动机10、车辆2进行控制的整体控制装置40。该整体控制装置40为，在发动机10的控制中，对缸内燃烧、涡轮增压器13、废气净化装置14、辅机的冷却风扇26A、冷却水泵26B、润滑油泵26C等进行控制。
以下，基于图2对搭载有这样的混合动力系统1的车辆2的控制方法进行说明。
混合动力系统用控制装置41判定是否产生了发动机主体11的起动请求(也包含怠速停止时的重新起动请求)(S10)，在产生了起动请求时，使曲轴用断接装置17成为断开状态(S20)，由此将第1带轮16a与曲轴15分离。
接着，对充电于第1蓄电池24A的电力进行供给，由此旋转驱动电动发电机21(S30)，并在使第1带轮16a的带轮直径为最大(S40)之后，使电动发电机21停止(S50)。
然后，在通过使曲轴用断接装置17成为连接状态(S60)而将第1带轮16a与曲轴15直接连结之后，再次旋转驱动电动发电机21(S70)，由此使发动机主体11进行曲轴转动(S80)。
通过进行这样的控制，在发动机主体11的起动开始时，曲轴15常时成为高扭矩且低旋转的状态，因此能够通过电动发电机21使发动机主体11可靠地起动。
符号的说明
1：混合动力系统；2：混合动力车辆；10：发动机；11：发动机主体；15：曲轴；16：CVT；16a：第1带轮；16b：第2带轮；17：曲轴用断接装置；21：电动发电机；41：混合动力系统用控制装置。

Claims (2)

1.一种混合动力系统，具有内燃机和电动发电机，其特征在于，设置有：
无级变速机构，与所述内燃机的曲轴直接连结，并且将所述内燃机的动力传递至所述电动发电机；
曲轴用断接装置，设置于所述曲轴，使所述内燃机与所述无级变速机构的动力传递连接或者断开；以及
控制单元，对所述混合动力系统进行控制，
在产生所述内燃机的起动请求时，所述控制单元使所述曲轴用断接装置成为断开状态，旋转驱动所述电动发电机，对所述无级变速机构进行控制以使从所述电动发电机朝所述曲轴的传递扭矩变大，之后使该电动发电机停止，在使所述曲轴用断接装置成为连接状态之后，旋转驱动所述电动发电机而使所述内燃机进行曲轴转动。
2.一种混合动力系统的控制方法，该混合动力系统具有内燃机以及电动发电机，经由与所述内燃机的曲轴直接连结的无级变速机构从所述电动发电机朝所述内燃机传递动力，所述混合动力系统的控制方法的特征在于，
在产生所述内燃机的起动请求时，使所述内燃机与所述无级变速机构的动力传递断开，旋转驱动所述电动发电机，对所述无级变速机构进行控制以使从所述电动发电机朝所述曲轴的传递扭矩变大，之后使该电动发电机停止，在使所述内燃机与所述无级变速机构的动力传递连接之后，旋转驱动所述电动发电机而使所述内燃机进行曲轴转动。
CN201480041911.7A 2013-08-09 2014-08-06 混合动力系统及其控制方法 Pending CN105408154A (zh)

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