WO2013168520A1 - ハイブリッド車両のegrガス冷却装置及びハイブリッド車両のegrガス冷却方法 - Google Patents
ハイブリッド車両のegrガス冷却装置及びハイブリッド車両のegrガス冷却方法 Download PDFInfo
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- WO2013168520A1 WO2013168520A1 PCT/JP2013/061323 JP2013061323W WO2013168520A1 WO 2013168520 A1 WO2013168520 A1 WO 2013168520A1 JP 2013061323 W JP2013061323 W JP 2013061323W WO 2013168520 A1 WO2013168520 A1 WO 2013168520A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D2041/0067—Determining the EGR temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D2041/1472—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a humidity or water content of the exhaust gases
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- 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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a technology for cooling EGR gas in a hybrid vehicle.
- an engine cooling system includes an EGR passage that recirculates part of exhaust gas by communicating the exhaust side and the intake side of the engine, and an EGR cooler provided in the EGR passage.
- a technique is disclosed in which the outlet-side cooling water flow path of the EGR cooler is shut off when water is below a predetermined temperature, and the outlet-side cooling water path is communicated when engine cooling water exceeds a predetermined temperature.
- the object of the present invention is to accurately prevent the generation of condensed water in the EGR cooler.
- an EGR gas cooling device for a hybrid vehicle includes an EGR cooler that cools EGR gas using a refrigerant that flows in a high-power cooling circuit that cools a motor that is one of the driving driving sources of the vehicle.
- FIG. 1 is a system configuration diagram of a hybrid vehicle equipped with an EGR gas cooling device for a hybrid vehicle in the first embodiment.
- FIG. 2 is a diagram showing a configuration of an EGR system that recirculates a part of exhaust gas (EGR gas) to the intake system.
- FIG. 3 is a system configuration diagram of a hybrid vehicle equipped with an EGR gas cooling device for a hybrid vehicle in the second embodiment.
- FIG. 4 is a diagram illustrating a temperature range in which high-electric cooling water is used as cooling water for cooling the EGR gas and a temperature range in which engine cooling water is used.
- FIG. 5 is a flowchart showing a method for controlling the introduction of cooling water into the EGR cooler.
- FIG. 6 is a diagram showing the relationship between the EGR gas temperature at which condensed water is generated, the atmospheric pressure, and the relative humidity for each EGR rate that is the ratio of returning EGR gas to the intake passage.
- FIG. 1 is a system configuration diagram of a hybrid vehicle equipped with an EGR gas cooling device for a hybrid vehicle in the first embodiment.
- This hybrid vehicle includes an engine 31 and a motor / generator 11 as a travel drive source.
- FIG. 1 shows a strong electric cooling circuit 1, an air conditioner circuit 2, and an engine cooling circuit 3.
- the high-power cooling circuit 1 is a circuit (passage) through which cooling water for cooling the motor / generator 11 and the inverter 12 flows.
- the motor / generator 11, the inverter 12, the water pump 13, the EGR cooler 14, and the auxiliary radiator 15 are provided. It has been.
- the air conditioner circuit 2 is a circuit (passage) through which refrigerant circulates, and is provided with an electric compressor 21, a condenser 22, an expansion valve 23, and an evaporator 24.
- the engine cooling circuit 3 is a circuit (passage) through which cooling water for cooling the engine 31 flows, and is provided with an engine 31, a water pump 32, a throttle chamber 33, and a main radiator 34.
- the capacity of the main radiator 34 is larger than the capacity of the sub radiator 15.
- the circulation of the cooling water in the high-power cooling circuit 1 is performed using the water pump 13.
- the cooling water discharged from the water pump 13 sequentially passes through the inverter 12, the motor / generator 11, the auxiliary radiator 15, and the EGR cooler 14, and then returns to the water pump 13.
- the sub radiator 15 radiates the cooling water by allowing the cooling water to pass therethrough.
- the electric compressor 21 compresses the gaseous refrigerant.
- the condenser 22 cools the high-pressure refrigerant discharged from the electric compressor 21.
- the expansion valve 23 depressurizes the refrigerant discharged from the capacitor 22.
- the evaporator 24 evaporates the refrigerant decompressed by the expansion valve 23 and cools the air.
- the cooling water in the engine cooling circuit 3 is circulated using a water pump 32.
- the cooling water discharged from the water pump 32 passes through the engine 31 and the main radiator 34 in order, and then returns to the water pump 32.
- the main radiator 34 radiates cooling water by allowing the cooling water to pass therethrough.
- FIG. 2 is a diagram showing the configuration of an EGR (Exhaust Gas Recirculation) system that recirculates part of the exhaust gas (EGR gas) to the intake system.
- the exhaust purification catalyst 201 oxidizes HC (hydrocarbon) and CO (carbon monoxide) in the exhaust gas discharged from the engine 31, and reduces NOx (nitrogen oxide) to purify the exhaust.
- a part of the purified exhaust gas is recirculated to the intake passage 203 through the EGR passage 202 as EGR gas. That is, air that passes through the throttle valve 205 and EGR gas that recirculates through the EGR passage 202 flow into the engine 31.
- the EGR passage 202 is provided with an EGR cooler 14 for cooling the EGR gas and an EGR valve 204 for adjusting the flow rate of the EGR gas to be recirculated.
- an A / F sensor 206 is provided upstream of the exhaust purification catalyst 201 of the exhaust system, and an O 2 sensor 207 is provided downstream.
- the EGR cooler 14 is provided not in the engine cooling circuit 3 but in the high-power cooling circuit 1. That is, as the cooling water for cooling the EGR gas, the cooling water (strong electric system cooling water) flowing through the strong electric cooling circuit 1 is used instead of the cooling water flowing through the engine cooling circuit 3 (engine cooling water).
- the cooling water of the high-power cooling circuit 1 at the start of EGR gas recirculation in the EGR system is higher in temperature than the cooling water of the engine cooling circuit 3. Therefore, by using strong electric system cooling water that has already been warmed to cool the EGR gas during engine warm-up, it is possible to prevent the generation of condensed water, and the EGR cooler 14 can be protected. In addition, since the EGR system can be used from an early stage during engine warm-up, fuel efficiency can be improved.
- the EGR gas cooling device for a hybrid vehicle in the first embodiment the EGR gas is cooled using the cooling water for cooling the motor / generator 11, so that the engine has already been warmed up.
- the cooling water for cooling the motor / generator 11 By using strong electric system cooling water, it can prevent that condensed water generate
- the EGR system can be used from an early stage during engine warm-up, fuel efficiency can be improved.
- FIG. 3 is a system configuration diagram of a hybrid vehicle equipped with an EGR gas cooling device for a hybrid vehicle in the second embodiment.
- a hybrid vehicle for example, a plug-in hybrid vehicle
- starts the engine 31 when the SOC of an assembled battery (not shown) reaches a predetermined SOC after traveling by the motor / generator 11 is assumed.
- the EGR cooler 14 is provided in the high-power cooling circuit 1.
- the configuration in which the EGR cooler 14 is provided in the high-power cooling circuit 1 and the configuration in which the engine cooling circuit 3 is provided can be switched. Therefore, switching valves 301 and 302 for switching between the cooling water flowing through the high-power cooling circuit 1 and the cooling water of the engine cooling circuit 3 are provided as cooling water for the EGR cooler 14 to cool the EGR gas. .
- the switching valve 301 is opened and the switching valve 302 is closed, cooling water from the engine cooling circuit 3 flows to the EGR cooler 14, and when the switching valve 301 is closed and the switching valve 302 is opened, the EGR cooler 14 has strong electric cooling.
- the cooling water of the circuit 1 flows.
- the first temperature sensor 311 detects the temperature of the engine coolant.
- the second temperature sensor 312 detects the temperature of the high-power cooling water.
- the controller 313 controls opening and closing of the switching valve 301 and the switching valve 302 based on the engine cooling water temperature detected by the first temperature sensor 311 and the high-power system cooling water temperature detected by the second temperature sensor 312.
- the engine 31 In the hybrid vehicle in which the engine 31 is started after traveling by the motor / generator 11 first, EV traveling by the motor / generator 11 is sufficiently performed before the engine start request.
- the temperature is high. Therefore, after the engine is started, the generation of condensed water in the EGR gas cooling system is prevented by using the strong electric system cooling water as the cooling water for cooling the EGR gas, and the EGR is started from an early stage during engine warm-up. Can be activated. Further, when the engine water temperature becomes higher than the high-electric cooling water temperature, the engine cooling water is used as cooling water for cooling the EGR gas.
- FIG. 4 is a diagram showing a temperature range in which strong electric system cooling water is used and a temperature range in which engine cooling water is used as cooling water for cooling the EGR gas.
- the high-power cooling water is saturated at a predetermined saturated water temperature.
- the engine cooling water temperature becomes higher than the saturated water temperature of the strong electric system cooling water, that is, when the engine cooling water temperature becomes higher than the high electric system cooling water temperature, the engine cooling water is used as cooling water for cooling the EGR gas.
- FIG. 5 is a flowchart showing a method for controlling the introduction of cooling water to the EGR cooler 14. The process starting from step S10 is performed by the controller 313.
- step S10 the engine 31 is started. Before the engine 31 is started, EV traveling by the motor / generator 11 is performed.
- step S20 it is determined whether or not the temperature of the high-power cooling water detected by the second temperature sensor 312 is higher than a predetermined temperature. If it is determined that the temperature of the high-power cooling water is higher than the predetermined temperature, the process proceeds to step S30, and if it is determined that the temperature is not higher than the predetermined temperature, the process proceeds to step S170.
- step S30 it is determined whether the intake air temperature is higher than a predetermined threshold value T1 and the humidity is higher than a predetermined threshold value H1.
- Each of the intake air temperature and humidity is one of the environmental conditions of the vehicle, and is detected by a sensor (not shown) and input to the controller 313.
- FIG. 6 is a diagram showing the relationship between the EGR gas temperature at which condensed water is generated, the atmospheric pressure, and the relative humidity for each EGR rate, which is the rate at which the RGR gas is recirculated to the intake passage.
- EGR rate the rate at which the RGR gas is recirculated to the intake passage.
- the relative humidity is 0% and the EGR rate is 30% at atmospheric pressure
- condensed water is generated at an EGR gas temperature of 27 ° C.
- the relative humidity is 100% and the EGR rate is 30% at atmospheric pressure
- condensed water is generated at an EGR gas temperature of 35 ° C.
- step S30 it is determined whether or not the intake air temperature is higher than the predetermined threshold T1 and the humidity is higher than the predetermined threshold H1, and if this determination is negative, condensate is likely to be generated. It judges that there exists, and controls for preventing generation
- step S40 the switching valve 301 is closed and the switching valve 302 is opened, thereby flowing the cooling water of the high-power cooling circuit 1 to the EGR cooler 14.
- step S50 it is determined whether an EGR operating condition is satisfied. If it is determined that the EGR operating condition is not satisfied, the process waits in step S50. If it is determined that the EGR operating condition is satisfied, the EGR valve 204 is opened, and the process proceeds to step S60.
- step S60 it is determined whether or not the engine coolant temperature detected by the first temperature sensor 311 is higher than the high-power coolant temperature detected by the second temperature sensor 312. If it is determined that the engine coolant temperature is equal to or lower than the high-power system coolant temperature, the process waits in step S60. If it is determined that the engine coolant temperature is higher than the high-power system coolant temperature, the process proceeds to step S70.
- step S70 the switching valve 301 is opened and the switching valve 302 is closed, so that the cooling water of the engine cooling circuit 3 flows to the EGR cooler 14.
- step S90 which proceeds after the determination in step S30 is denied, the target EGR rate and the EGR operation start engine water temperature are changed in order to prevent the generation of condensed water. Specifically, the target EGR rate is decreased and the EGR operation start engine water temperature is increased. In step S90, only the process of lowering the target EGR rate may be performed, or only the process of increasing the EGR operation start engine water temperature may be performed.
- step S100 it is determined whether or not the high-power cooling water temperature detected by the second temperature sensor 312 is higher than the EGR operation start engine water temperature changed in step S90. If it is determined that the high-power system coolant temperature is higher than the EGR operation start engine water temperature, the process proceeds to step S110.
- step S110 the switching valve 301 is closed and the switching valve 302 is opened, so that the cooling water of the high-power cooling circuit 1 flows to the EGR cooler 14.
- step S120 it is determined whether or not an EGR operating condition is satisfied. If it is determined that the EGR operating condition is not satisfied, the process waits in step S120. If it is determined that the EGR operating condition is satisfied, the EGR valve 204 is opened and the process proceeds to step S130.
- step S130 it is determined whether or not the engine coolant temperature detected by the first temperature sensor 311 is higher than the high-power coolant temperature detected by the second temperature sensor 312. If it is determined that the engine coolant temperature is equal to or lower than the high-power system coolant temperature, the process waits in step S130. If it is determined that the engine coolant temperature is higher than the high-power system coolant temperature, the process proceeds to step S140.
- step S140 the switching valve 301 is opened and the switching valve 302 is closed, so that the cooling water of the engine cooling circuit 3 flows to the EGR cooler 14.
- step S100 If it is determined in step S100 that the high-power system coolant temperature is equal to or lower than the EGR operation start engine water temperature, the process proceeds to step S150.
- step S150 the switching valve 301 is opened and the switching valve 302 is closed, so that the cooling water of the engine cooling circuit 3 flows to the EGR cooler 14.
- step S160 it is determined whether or not the EGR operating condition is satisfied. If it is determined that the EGR operating condition is not satisfied, the process stands by in step S160. If it is determined that the EGR operating condition is satisfied, the EGR valve 204 is opened, and the process of the flowchart is ended.
- step S170 which proceeds after the determination in step S20 is denied, the switching valve 301 is opened and the switching valve 302 is closed, whereby the cooling water of the engine cooling circuit 3 is caused to flow to the EGR cooler 14.
- step S180 it is determined whether the intake air temperature is higher than a predetermined threshold value T1 and the humidity is higher than a predetermined threshold value H1. If it is determined that the intake air temperature is higher than the predetermined threshold T1 and the humidity is higher than the predetermined threshold H1, the process proceeds to step S190. Otherwise, the process proceeds to step S200.
- step S190 it is determined whether an EGR operating condition is satisfied. If it is determined that the EGR operating condition is not satisfied, the process waits in step S190. If it is determined that the EGR operating condition is satisfied, the EGR valve 204 is opened and the process of the flowchart is ended.
- step S200 the target EGR rate and the EGR operation start engine water temperature are changed in order to prevent generation of condensed water. Specifically, the target EGR rate is decreased and the EGR operation start engine water temperature is increased. In step S200, only the process of decreasing the target EGR rate may be performed, or only the process of increasing the EGR operation start engine water temperature may be performed.
- step S210 it is determined whether or not an EGR operating condition is satisfied. If it is determined that the EGR operating condition is not satisfied, the process waits in step S210. If it is determined that the EGR operating condition is satisfied, the EGR valve 204 is opened, and the process of the flowchart is ended.
- the cooling water flowing in the engine cooling circuit 3 and the cooling water flowing in the high-power cooling circuit 1 are used as cooling water for cooling the EGR gas.
- Switchable switching valves 301 and 302 are provided, and the opening and closing of the switching valves 301 and 302 are controlled according to the temperature of the cooling water flowing in the engine cooling circuit 3.
- the cooling water flowing in the engine cooling circuit 3 and the cooling water flowing in the strong electric cooling circuit 1 are switched to the appropriate one. Can do.
- cooling water flowing in the high-power cooling circuit 1 is selected as cooling water for cooling the EGR gas, and the temperature of the engine cooling water is a predetermined temperature.
- the switching valves 301 and 302 are controlled to open and close so that the cooling water flowing in the engine cooling circuit 3 is selected as the cooling water for cooling the EGR gas.
- the already heated high-power cooling water is used as cooling water for cooling the EGR gas, thereby preventing the generation of condensed water in the EGR gas cooling system and early Since the EGR can be operated from the stage, fuel consumption can be improved.
- the high-power cooling water is continuously used as the cooling water for cooling the EGR gas, it is necessary to increase the capacity of the sub-radiator 15 provided in the high-power cooling circuit 1 to the capacity of the main radiator 34. is there.
- the coolant for cooling the EGR gas is switched from the high-power coolant to the engine coolant, so there is no need to increase the capacity of the secondary radiator 15 and the cost increase is suppressed. can do.
- the EGR gas when the temperature of the refrigerant flowing in the engine cooling circuit exceeds the EGR start temperature, the EGR gas starts to recirculate, and the EGR start temperature is changed based on the environmental conditions of the vehicle. Under the environmental conditions in which condensed water is likely to be generated, generation of condensed water can be prevented by increasing the EGR start temperature. Moreover, under the environmental conditions in which condensed water is likely to be generated, generation of condensed water can be prevented by reducing the rate at which the EGR gas is refluxed.
- the present invention is not limited to the embodiment described above.
- coolant which flows through the high-power cooling circuit 1 was given and demonstrated, it is not limited to water.
- the refrigerant flowing through the engine cooling circuit 3 is not limited to water.
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
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Abstract
Description
図1は、第1の実施形態におけるハイブリッド車両のEGRガス冷却装置を搭載したハイブリッド車両のシステム構成図である。このハイブリッド車両は、走行駆動源として、エンジン31とモータ・ジェネレータ11とを備えている。図1では、強電冷却回路1と、エアコン回路2と、エンジン冷却回路3とを示している。
図3は、第2の実施形態におけるハイブリッド車両のEGRガス冷却装置を搭載したハイブリッド車両のシステム構成図である。本実施形態では、モータ・ジェネレータ11による走行後、組電池(不図示)のSOCが所定SOCになったところでエンジン31を始動させるハイブリッド車両(例えば、プラグインハイブリッド車両)を想定している。以下の説明では、図1に示すシステム構成図と異なる部分について説明する。
Claims (7)
- 車両の走行駆動源としてエンジンとモータとを備えたハイブリッド車両において、前記エンジンの排ガスの一部をEGRガスとして吸気路に還流するEGRシステムに設けられ、前記EGRガスを冷却するハイブリッド車両のEGRガス冷却装置において、
前記モータを冷却する強電冷却回路内を流れる冷媒を用いて前記EGRガスを冷却するEGRクーラを備える、
ハイブリッド車両のEGRガス冷却装置。 - 請求項1に記載のハイブリッド車両のEGRガス冷却装置において、
前記EGRガスを冷却する冷媒として、前記エンジンを冷却するエンジン冷却回路内を流れる冷媒と、前記強電冷却回路内を流れる冷媒とを切替可能な切替手段と、
前記エンジン冷却回路内を流れる冷媒の温度を検出するエンジン冷却冷媒温度検出手段と、
前記エンジン冷却回路内を流れる冷媒の温度に応じて、前記切替手段による切替を制御する切替制御手段と、
をさらに備えるハイブリッド車両のEGRガス冷却装置。 - 請求項2に記載のハイブリッド車両のEGRガス冷却装置において、
前記モータによる走行後に前記エンジンを始動させるハイブリッド車両において、
前記切替制御手段は、前記エンジンの始動後は前記EGRガスを冷却する冷媒として前記強電冷却回路内を流れる冷媒を選択し、前記エンジン冷却回路内を流れる冷媒の温度が所定温度より高くなると、前記EGRガスを冷却する冷媒として前記エンジン冷却回路内を流れる冷媒を選択するように、前記切替手段による切替を制御する、
ハイブリッド車両のEGRガス冷却装置。 - 請求項3に記載のハイブリッド車両のEGRガス冷却装置において、
前記強電冷却回路内を流れる冷媒の温度を検出する強電冷却冷媒温度検出手段をさらに備え、
前記所定温度は、前記強電冷却回路内を流れる冷媒の温度である、
ハイブリッド車両のEGRガス冷却装置。 - 請求項1から請求項4のいずれか一項に記載のハイブリッド車両のEGRガス冷却装置において、
前記EGRシステムでは、前記エンジン冷却回路内を流れる冷媒の温度がEGR開始温度を超えると、前記EGRガスの還流を開始するものであって、
車両の環境条件を検出する環境条件検出手段と、
前記車両の環境条件に基づいて、前記EGR開始温度を変更するEGR開始温度変更手段と、
をさらに備えるハイブリッド車両のEGRガス冷却装置。 - 請求項1から請求項4のいずれか一項に記載のハイブリッド車両のEGRガス冷却装置において、
車両の環境条件を検出する環境条件検出手段と、
前記車両の環境条件に基づいて、前記EGRガスを還流させる割合を変更するEGR率変更手段と、
をさらに備えるハイブリッド車両のEGRガス冷却装置。 - 車両の走行駆動源としてエンジンとモータとを備えたハイブリッド車両において、前記エンジンの排ガスの一部をEGRガスとして吸気路に還流するEGRシステムに設けられ、前記EGRガスを冷却するハイブリッド車両のEGRガス冷却方法において、
前記モータを冷却する強電冷却回路内を流れる冷媒を用いて前記EGRガスを冷却する、
ハイブリッド車両のEGRガス冷却方法。
Priority Applications (3)
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US14/399,035 US9133794B2 (en) | 2012-05-09 | 2013-04-16 | EGR gas cooling device for hybrid vehicle and EGR gas cooling method for hybrid vehicle |
JP2014514419A JP5843006B2 (ja) | 2012-05-09 | 2013-04-16 | ハイブリッド車両のegrガス冷却装置及びハイブリッド車両のegrガス冷却方法 |
CN201380023996.1A CN104271933B (zh) | 2012-05-09 | 2013-04-16 | 混合动力车辆的egr气体冷却装置以及混合动力车辆的egr气体冷却方法 |
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US (1) | US9133794B2 (ja) |
JP (1) | JP5843006B2 (ja) |
CN (1) | CN104271933B (ja) |
WO (1) | WO2013168520A1 (ja) |
Cited By (2)
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WO2015163227A1 (ja) * | 2014-04-25 | 2015-10-29 | いすゞ自動車株式会社 | ハイブリッドシステム、ハイブリッドシステム車両、及び、ハイブリッドシステムのegr方法 |
JP2020158045A (ja) * | 2019-03-28 | 2020-10-01 | コベルコ建機株式会社 | ハイブリッド式建設機械 |
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JP2018178881A (ja) * | 2017-04-14 | 2018-11-15 | 愛三工業株式会社 | Egr冷却装置 |
KR102506945B1 (ko) * | 2018-08-27 | 2023-03-07 | 현대자동차 주식회사 | 하이브리드 차량의 냉각시스템 |
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- 2013-04-16 CN CN201380023996.1A patent/CN104271933B/zh not_active Expired - Fee Related
- 2013-04-16 US US14/399,035 patent/US9133794B2/en not_active Expired - Fee Related
- 2013-04-16 JP JP2014514419A patent/JP5843006B2/ja not_active Expired - Fee Related
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Also Published As
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JPWO2013168520A1 (ja) | 2016-01-07 |
CN104271933B (zh) | 2016-03-09 |
US9133794B2 (en) | 2015-09-15 |
US20150136094A1 (en) | 2015-05-21 |
CN104271933A (zh) | 2015-01-07 |
JP5843006B2 (ja) | 2016-01-13 |
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