CN104294876A - 混合动力工程机械 - Google Patents
混合动力工程机械 Download PDFInfo
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
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- 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
- B60K6/46—Series type
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- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
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- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
- E02F9/2075—Control of propulsion units of the hybrid type
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2091—Control of energy storage means for electrical energy, e.g. battery or capacitors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
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- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F15B2211/00—Circuits for servomotor systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F15B2211/00—Circuits for servomotor systems
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- F15B2211/2053—Type of pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
本发明涉及一种混合动力工程机械,包括:液压致动器;液压泵;发电电动机;发动机;电动致动器,产生再生动力;蓄电装置;进行充放电作用;充电率检测器,检测所述蓄电装置的充电率C1;以及控制部,控制所述发动电动机的运转和所述蓄电装置的充放电作用,其中,所述控制部进行过充电防止控制,即在所述充电率检测器检测出的充电率C1超过设定值Cs时,使所述发电电动机的电动机作用产生的辅助动力比C1≤Cs时大,所述设定值Cs是预先设定的充电率的值,在充电率的值为所述设定值Cs时,若蓄电装置再被充入所述电动致动器的再生动力,则有过充电的可能。根据本发明,能够防止混合动力工程机械中的蓄电装置过充电。
Description
技术领域
本发明涉及一种并用发动机动力和蓄电装置电力的混合动力工程机械。
背景技术
以图5的挖掘机为例对本发明的背景技术进行说明。
上述挖掘机包括:履带式下部行走体1;绕垂直于地面的轴X回转自如地装设在履带式下部行走体1上的上部回转体2;安装于该上部回转体2的用于挖掘作业的前附属装置3;以及发动机。
上述前附属装置3具有:起伏自如的动臂4;安装于该动臂4的前端的斗杆5;安装于该斗杆5的前端的铲斗6;以及驱动上述部件的多个液压致动器,即动臂缸7、斗杆缸8以及铲斗缸9。
除此以外,日本专利公开公报特开2000-283107号及日本专利公开公报特开2007-247230号中记载的混合动力挖掘机还包括:用于驱动液压致动器的液压泵;进行发电机作用和电动机作用的发电电动机;以及蓄电装电。上述液压泵和发电电动机连接于上述发动机。上述发电电动机通过上述发电机作用来对蓄电装置充电,并在适当的时候通过该蓄电装置的蓄电力来被驱动,进行电动机作用,通过该电动机作用来辅助发动机。
另外,混合动力挖掘机有时还包括将上述蓄电装置作为电源而动作的电动制动致器,例如,作为上述回转体2的回转驱动源的回转电动机、或者使前附属装置3动作的电动缸等。
该电动致动器可进行再生动作。例如该电动致动器为回转电动机时,该回转电动机通过回转减速动作来生成再生电力。该再生电力被储存于上述蓄电装置。通过该蓄电装置的充电作用来使再生制动器动作。
然而,此种类型的混合动力挖掘机中,若动力回收时的蓄电装置的充电率偏高,则蓄电装置会由于再生动力回收而超过适当的充电率,导致过充电,该过充电可能导致该蓄电装置的故障或寿命的缩短。作为其对策,可设置再生电阻,使电动致动器的再生动力消耗于再生电阻,这样需要追加驱动系以外的设备,具体为较大的上述再生电阻及其控制装置,以及对再生电阻所发的热进行处理的设备。该方案,尤其在空间限制较严格的挖掘机中导致设备布局困难化,并导致成本升高。
发明内容
本发明的目的在于提供一种混合动力工程机械,其具备电动致动器及储存该电动致动器的再生动力的蓄电装置,能够防止该蓄电装置的过充电。
本发明的混合动力工程机械包括:液压致动器;液压泵,作为所述液压致动器的液压源;发电电动机,进行发电机作用和电动机作用;发动机,作为所述液压泵及所述发电电动机的动力源,与所述发电电动机连接,以便得到进行所述电动机作用的所述发电电动机的辅助;电动致动器,产生再生动力;蓄电装置;进行充放电作用,即在所述发电电动机和所述电动致动器之间传递电力;充电率检测器,检测所述蓄电装置的充电率C1;以及控制部,控制所述发动电动机的运转和所述蓄电装置的充放电作用,其中,所述控制部进行过充电防止控制,即在所述充电率检测器检测出的充电率C1超过设定值Cs时,使所述发电电动机的电动机作用产生的辅助动力比C1≤Cs时大,所述设定值Cs是预先设定的充电率的值,在充电率的值为所述设定值Cs时,若蓄电装置再被充入所述电动致动器的再生动力,则有过充电的可能。
根据本发明,能够防止混合动力工程机械中的蓄电装置过充电。
附图说明
图1是表示本发明实施方式的混合动力挖掘机的系统结构图。
图2是对上述混合动力挖掘机中进行的主要的控制动作进行说明的流程图。
图3是上述混合动力挖掘机的充电率和充电装置的充电可能动力的关系图。
图4是上述混合动力挖掘机的发动机转速和发动机总动力的关系图。
图5是混合动力挖掘机的概略侧视图。
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。此外,以下的实施方式是将本发明应用于图5的混合动力挖掘机的一例,其以设有回转电动机的情况为例,该回转电动机作为电动致动器而成为回转动力源。
本实施方式中的混合动力挖掘机包括:图1所示的发动机10;发电发动机11;液压泵12;控制阀13;液压致动器14;蓄电装置15;控制器16;电动机控制部17以及回转电动机18。
上述发动机10是上述发电发动机11和上述液压泵12的动力源。上述发电发动机11进行发电机作用和电动机作用。液压泵12是液压致动器14的液压源。上述发电发动机11和上述液压泵12与上述发动机10连接,被该发动机10驱动。
上述液压致动器14代表性地表示图5所示的动臂缸7以及其它液压致动器。该液压致动器14通过控制阀13与上述液压泵12连接,利用该液压泵所供给的液压油来驱动。
上述发电发动机11被上述发动机10驱动而进行发电机作用,由此产生电力。该电力被送往蓄电装置15并储存于该蓄电装置。即,辅助蓄电装置15充电。另一方面,发电发动机11利用该蓄电装置15的电力来进行电动机作用,以辅助发动机10。
上述发电发动机11经由电动机控制部17而与回转电动机18及蓄电装置15连接。该电动机控制部17与上述控制器16一同构成本发明的控制部。上述回转电动机18利用储存于上述蓄电装置15的电力而被驱动,以使图5所示的上部回转体2回转。另外,上述回转电动机18在回转减速时产生再生动力,该再生动力被送往上述蓄电装置而对蓄电装置15充电。
上述电动机控制部17控制发电电动机11、回转电动机18及蓄电装置15之间的电力的传递。具体而言,控制蓄电装置15的充放电、发电电动机11和回转电动机18的运转。
作为检测单元,该混合动力挖掘机还包括:发动机转速传感器19,检测发动机转速;泵动力检测部20,根据液压泵12的压力和流量来检测液压泵12所要求的动力,即泵要求动力;充电率传感器21,为检测蓄电装置15的充电率的充电率检测器;温度传感器22,为检测蓄电装置15的温度的温度检测器;再生动力检测部23检测与回转电动机18的转速对应的再生动力,即以该转速减速时产生的再生电力。
上述检测单元分别产生关于发动机转速、泵要求动力、充电率、蓄电装置以及再生动力的信号,输入上述控制器16。
上述控制器16存储有预先设定的以下的特性等。
(a)对应于蓄电装置15的温度的充电率与可充电的动力的关系
能够储存于蓄电装置15的动力F,即与蓄电装置15在不超出适当充电率的范围内可从外部吸收的电力相当的动力,如图3所示,在充电开始时刻的充电率越低,则充电的余力越大。另外,即使充电率相同,蓄电装置15的温度越高则该可充电动力F越大。因此,图3所示的特性被预先设定并存储于控制器16。控制器16根据基于该特性根据检测出的充电率C1和温度来查出此时的可充电动力F。
(b)发动机转速与发动机总动力的关系
发动机10的旋转所需的动力即发动机总动力B相当于用于驱动发动机本体的动力、以及液压泵12以外的发动机附属部分即风扇、发动机活塞及曲轴等的附属部件动力。如图4所示,该发动机总动力B对应于发动机转速而变化,发动机转速越高则发动机总动力B越大。因此,如图4所示的发动机转速与发动机总动力B的关系被预先设定并存储于控制器16。控制器16基于该特性根据检测出的发动机转速求得此时的发动机总动力B。
(c)充电率
蓄电装置15在充电率较高的情况下再被充入回转电动机18的再生电力,即蓄电装置15的过充电有引发该蓄电装置15故障或寿命降低的可能性。因此,预先设定如图3所示的充电率的设定值Cs,并存储于控制器16,在蓄电装置15的充电率的值为设定值Cs时,若蓄电装置15再被充入回转电动机18的再生动力,则有过充电的可能。具体而言,该设定值Cs例如被设定为比具有一定范围的适当充电率的上限值低的值。
存储有以上信息的控制器16基于上述(a)的特性,根据检测出的充电率C1求得作为充电的余力的可充电动力F,此时,判断充电率C1是否低于设定值Cs,基于该判断来决定发电电动机11的辅助动力,将该辅助动力向该发电电动机11输出。
根据图2的流程图来对该控制器16进行的具体的控制动作进行说明。
控制开始时,在步骤S1中,控制器16基于图3的特性,根据检测出的蓄电装置15的充电率C1及温度算出蓄电装置15的可充电动力F。图3中仅表示了I,、II和III这三种蓄电装置温度,但蓄电装置温度可以被设定得更细致。或者,也可以通过插值计算求出温度I、II之间的温度、以及温度II、III之间的温度所对应的可充電动力F。
接下来,在步骤S2中,控制器16判定检测出的充电率C1是否高于设定值Cs。在C1≤Cs时(步骤S2中为“否”时),控制器16在步骤S3中,将发电电动机11产生的辅助动力的最大值即最大辅助动力D设定为泵要求动力A。即,将该最大辅助动力D设定为D=A。相对地,在C1>Cs时(步骤S2中为“是”时),控制器16在步骤S4中,基于图4的特性,根据检测出的发动机转速来算出发动机总动力B,在步骤S5中,将所述最大辅助动力D设定为所述泵要求动力A和发动机总动力B的和。即,将该最大辅助动力D设定为D=A+B。
控制器16在步骤S6中,基于以下计算式求出必要辅助动力G,即根据步骤S1中求得的可充电动力F和回转电动机18所产生的再生动力E而求出的、为了避免过充电而应该作为发电电动机11的辅助动力被消耗掉的蓄电装置电力,该再生动力E由转速决定,在回转停止中为0。
必要辅助动力G=再生动力E-可充电动力F
根据上式可知,在回转停止中,由于再生动力E=0,因此必要辅助动力G为负数。
接下来,在步骤S7中,控制器16判断最大辅助动力D是否大于必要辅助动力G。在D<G时,即步骤S7为“否”时,控制器16在步骤S8中将实际的辅助动力H设定为最大辅助动力D。即,将该实际的辅助动力H设定为H=D。相对地,在D≥G时,即步骤S7为“是”时,控制器16在步骡S9中将实际的辅助动力H设定为必要辅助动力G。即,将该实际的辅助动力H设定为H=G。
在步骤S10中,控制器16基于步骤S8或步骤S9中的处理结果,将最大辅助动力D或必要辅助动力G作为实际的辅助动力H即发电电动机输出而进行指令,然后重复步骤S1。
进行以上说明的上述控制部,可得到以下效果。
(1)上述控制部在C1>Cs的情况下,即蓄电装置有过充电可能的情况下,将发电电动机11的辅助动力设定为比C1≤Cs时大的动力,由此可增加蓄电装置15所释放的电力,以减小其充电率,从而可防止蓄电装置15因冲充入回转电动机18的再生动力过充电。
(2)上述控制部在C1>Cs时,使最大辅助动力D=泵要求动力A+发动机总动力B,由此,不仅能够可靠地防止蓄电装置15的过充电,还能使发动机10的燃料喷射量接近于0,以得到节能效果。
(3)上述控制部在C1≤Cs时,即没有过充电危险的时候,使发电发动机11只对发动机10辅助泵要求动力A的量,以能够确保蓄电装置15的适当的充放电作用。
(4)上述控制部根据上述充电率传感器21及上述温度传感器22所分别检测出的蓄电装置15的温度及充电率C1来求出可充电动力F,由此正确地查出蓄电装置15的可充电动力。
本发明并不限定于上述实施方式。例如,上述实施方式中,在回转停止中也进行过充电防止控制,然而,由于实际的过充电在利用回转减速产生再生动力时发生的可能性较高,因此,可仅在回转动作中进行过充电防止控制。另外,上述实施方式中,以具有回转电动机18来作为电动致动器的混合动力挖掘机为例,然而,本发明也同样适用于除了回转电动机18外还具有使前附属装置动作的电动缸或以该电动缸代替上述回转电动机18的混合动力挖掘机或挖掘机以外的混合动力工程机械。
如上所述,本发明提供一种混合动力工程机械,包括:电动致动器、吸收该电动致动器的再生动力的驱动系、储存其再生电力的蓄电装置,能够防止该蓄电装置过充电。
本发明的混合动力工程机械,包括:液压致动器;液压泵,作为所述液压致动器的液压源;发电电动机,进行发电机作用和电动机作用;发动机,作为所述液压泵及所述发电电动机的动力源,与所述发电电动机连接,以便得到进行所述电动机作用的所述发电电动机的辅助;电动致动器,产生再生动力;蓄电装置;进行充放电作用,即在所述发电电动机和所述电动致动器之间传递电力;充电率检测器,检测所述蓄电装置的充电率C1;以及控制部,控制所述发动电动机的运转和所述蓄电装置的充放电作用,其中,所述控制部进行过充电防止控制,即在所述充电率检测器检测出的充电率C1超过设定值Cs时,使所述发电电动机的电动机作用产生的辅助动力比C1≤Cs时大,所述设定值Cs是预先设定的充电率的值,在充电率的值为所述设定值Cs时,若蓄电装置再被充入所述电动致动器的再生动力,则有过充电的可能。
该混合动力工程机械的上述控制部在蓄电装置有过充电可能的情况下,即C1>Cs的情况下,使发电电动机的辅助动力比C1≤Cs时大,由此可增加蓄电装置所释放的电力,以减小充电率,从而可防止该蓄电装置因冲充入再生动力过充电。
较为理想的是,所述控制部设定最大辅助动力D来进行所述过充电防止控制,所述最大辅助动力D为所述发电电动机所能辅助的动力的最大值。
上述情况下,较为理想的是,在泵要求动力为A,发动机总动力为B的情况下,所述控制部设定所述最大辅助动力来进行所述过充电防止控制,使得在C1>Cs时D=A+B,所述泵要求动力由所述液压泵的压力和流量求得,所述发动机总动力为用于驱动所述发动机的本体的动力以及用于驱动除了所述液压泵以外的发动机附属部分所需的附属部件动力之和。该控制在C1>Cs时,不仅能够可靠地防止蓄电装置的过充电,还能使发动机的燃料喷射量接近于0,以得到节能效果。
较为理想的是,在泵要求动力为A的情况下,所述控制部设定所述最大辅助动力,使得在C1≤Cs时D=A,所述泵要求动力由所述液压泵的压力和流量求得。由此,在没有过充电危险的情况下,使发电发动机只对发动机辅助泵要求动力A的量,以能够确保蓄电装置15的适当的充放电作用。
另一方面,较为理想的是,在再生动力为E,可充电动力为F,必要辅助动力为G的情况下,所述控制部根据计算式G=E-F来求出G,在D≥G时将所述必要辅助动力作为所述发电电动机的辅助动力,在D<G时将所述最大辅助动力作为所述发电电动机的辅助动力,所述再生动力为所述电动致动器所产生的动力,所述可充电动力为根据所述蓄电装置的充电率求得的充电的余力,所述必要辅助动力是应作为所述发电电动机的辅助动力而消耗的蓄电装置电力。该控制可防止因消耗必要的辅助动力以上的动力而导致的能源浪费。
上述情况下,较为理想的是,还包括:温度检测器,用于检测所述蓄电装置的温度,其中,所述控制部根据检测出的充电率C1和蓄电装置来求得所述可充电动力F。由于上述蓄电装置的可充电动力不仅受到充电率左右,还受到蓄电装置温度的左右,因此,如上所述,通过进一步考虑蓄电装置温度,而能够正确地查出蓄电装置的可充电动力。
Claims (7)
1.一种混合动力工程机械,其特征在于包括:
液压致动器;
液压泵,作为所述液压致动器的液压源;
发电电动机,进行发电机作用和电动机作用;
发动机,作为所述液压泵及所述发电电动机的动力源,与所述发电电动机连接,以便得到进行所述电动机作用的所述发电电动机的辅助;
电动致动器,产生再生动力;
蓄电装置;进行充放电作用,即在所述发电电动机和所述电动致动器之间传递电力;
充电率检测器,检测所述蓄电装置的充电率C1;以及
控制部,控制所述发动电动机的运转和所述蓄电装置的充放电作用,其中,
所述控制部进行过充电防止控制,即在所述充电率检测器检测出的充电率C1超过设定值Cs时,使所述发电电动机的电动机作用产生的辅助动力比C1≤Cs时大,所述设定值Cs是预先设定的充电率的值,在充电率的值为所述设定值Cs时,若蓄电装置再被充入所述电动致动器的再生动力,则有过充电的可能。
2.如权利要求1所述的混合动力工程机械,其特征在于:
所述控制部设定最大辅助动力D来进行所述过充电防止控制,所述最大辅助动力D为所述发电电动机所能辅助的动力的最大值。
3.如权利要求2所述的混合动力工程机械,其特征在于:
在泵要求动力为A,发动机总动力为B的情况下,所述控制部设定所述最大辅助动力来进行所述过充电防止控制,使得在C1>Cs时D=A+B,所述泵要求动力由所述液压泵的压力和流量求得,所述发动机总动力为用于驱动所述发动机的本体的动力以及用于驱动除了所述液压泵以外的发动机附属部分所需的附属部件动力之和。
4.如权利要求2所述的混合动力工程机械,其特征在于:
在泵要求动力为A的情况下,所述控制部设定所述最大辅助动力,使得在C1≤Cs时D=A,所述泵要求动力由所述液压泵的压力和流量求得。
5.如权利要求4所述的混合动力工程机械,其特征在于:
在发动机总动力为B的情况下,所述控制部设定所述最大辅助动力来进行所述过充电防止控制,使得在C1>Cs时D=A+B,所述发动机总动力为用于驱动所述发动机的本体的动力以及用于驱动除了所述液压泵以外的发动机附属部分所需的附属部件动力之和。
6.如权利要求2至5中任一项所述的混合动力工程机械,其特征在于:
在再生动力为E,可充电动力为F,必要辅助动力为G的情况下,所述控制部根据计算式G=E-F来求出G,在D≥G时将所述必要辅助动力作为所述发电电动机的辅助动力,在D<G时将所述最大辅助动力作为所述发电电动机的辅助动力,所述再生动力为所述电动致动器所产生的动力,所述可充电动力为根据所述蓄电装置的充电率求得的充电的余力,所述必要辅助动力是应作为所述发电电动机的辅助动力而消耗的蓄电装置电力。
7.如权利要求6所述的混合动力工程机械,其特征在于还包括:
温度检测器,用于检测所述蓄电装置的温度,其中,
所述控制部根据检测出的充电率C1和蓄电装置来求得所述可充电动力F。
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US9243384B2 (en) | 2016-01-26 |
KR20150010609A (ko) | 2015-01-28 |
KR102215397B1 (ko) | 2021-02-10 |
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