US20160230643A1 - Engine cooling system - Google Patents

Engine cooling system Download PDF

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Publication number
US20160230643A1
US20160230643A1 US15/022,699 US201415022699A US2016230643A1 US 20160230643 A1 US20160230643 A1 US 20160230643A1 US 201415022699 A US201415022699 A US 201415022699A US 2016230643 A1 US2016230643 A1 US 2016230643A1
Authority
US
United States
Prior art keywords
radiator
engine
cooling
cooling water
rankine cycle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/022,699
Other languages
English (en)
Inventor
Taku HONDA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Assigned to ISUZU MOTORS LIMITED reassignment ISUZU MOTORS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HONDA, TAKU
Publication of US20160230643A1 publication Critical patent/US20160230643A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P9/00—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00
    • F01P9/06—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00 by use of refrigerating apparatus, e.g. of compressor or absorber type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P9/00—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00
    • F01P9/02—Cooling by evaporation, e.g. by spraying water on to cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/03—Reducing weight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P2003/001—Cooling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F01P2003/185—Arrangements or mounting of liquid-to-air heat-exchangers arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00—Applications
    • F01P2050/22—Motor-cars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/02—Intercooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/16—Outlet manifold
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers

Definitions

  • the present invention relates to an engine cooling system, and more specifically relates to an engine cooling system including a Rankine cycle with an improved performance while suppressing an increase in vehicle weight caused by employing the Rankine cycle.
  • Patent Literature 1 engine-main-body cooling water heated by an engine main body is used as a heating source of a Rankine cycle while intercooler cooling water cooled by a sub-radiator is used as a cooling source, so that a temperature difference between these flows of cooling water can be recovered as a power energy in a compressor (turbine).
  • the temperature of the engine-main-body cooling water is merely around 100° C., it is only possible to obtain a relatively small temperature difference between the flows of cooling water. Hence, it is difficult to have the Rankine cycle exhibit a sufficient performance to further improve the fuel economy.
  • Patent Document 1 Japanese patent application Kokai publication No. 11-51582
  • An object of the present invention is to provide an engine cooling system capable of suppressing an increase in vehicle weight caused by employing a Rankine cycle and capable of improving the Rankine cycle performance.
  • an engine cooling system of the present invention is an engine cooling system including: a Rankine cycle configured such that a coolant circulates through a cooling pump, an evaporator, an expander, and a condenser in this order; an engine main body in which a supercharger is arranged in an intake passage; and a radiator through which cooling water for the engine main body circulates.
  • the engine cooling system is characterized in that a sub-radiator is installed parallel to the radiator, compressed air compressed by the supercharger is used as a heating source for the evaporator, and outlet-side cooling water of the sub-radiator is used as a cooling source for the condenser.
  • the heating source used for the evaporator in the Rankine cycle is compressed air having a higher temperature than that of conventional engine-main-body cooling water. This makes it possible to improve the performance of the Rankine cycle, thereby improving the fuel economy.
  • FIG. 1 is a configuration diagram of an engine cooling system according to an embodiment of the present invention.
  • FIG. 1 shows an engine cooling system according to the embodiment of the present invention.
  • This engine cooling system includes a sub-radiator 2 and a radiator 3 disposed in this order from a front surface of a vehicle 1 .
  • the sub-radiator 2 and the radiator 3 are configured to perform air-cooling by utilizing vehicle-speed wind and cooling wind of a cooling fan (not shown) when the vehicle 1 is running or idling.
  • air A is drawn to an intake passage 5 , passes through an air cleaner not shown, and is compressed by a compressor 7 of a turbocharger 6 . Then, compressed air 8 thus obtained is supplied to an engine main body 10 via an intake manifold 9 .
  • the compressed air 8 supplied to the engine main body 10 is mixed with a fuel and burned, thereby generating a thermal energy. Then, a burned gas 11 thus obtained is discharged from an exhaust manifold 12 to an exhaust passage 13 . Some of the burned gas 11 is diverted as an EGR gas 15 into an EGR passage 14 , which is located in front of the intake manifold 9 and connected to the intake passage 5 . To the EGR passage 14 , a water-cooled EGR cooler 16 and an EGR valve 17 configured to adjust a flow amount of the EGR gas 15 are disposed in this order from the exhaust passage 13 side.
  • Flow amounts of engine-main-body cooling water 18 for cooling the engine main body 10 and EGR-cooler cooling water 19 used for cooling in the EGR cooler 15 are regulated by a thermostat 20 .
  • the engine-main-body cooling water 10 and the EGR-cooler cooling water 19 are forced to circulate between the radiator 3 and corresponding one of the engine main body 10 and the EGR cooler 15 by the water pump 13 .
  • cooling water 22 diverted from the thermostat 19 during warming-up time of the engine main body 10 circulates without passing through the radiator 3 .
  • some of the engine-main-body cooling water 18 normally flows as the EGR-cooler cooling water 19 .
  • a portion of the burned gas 11 which is not diverted to the EGR passage 15 is released as an exhaust gas G into the atmosphere after an exhaust gas purification device 24 including DPF, SCR, and the like purifies harmful substances by driving the rotation of a turbine 23 of the turbocharger 6 .
  • the engine cooling system as described above is provided with a Rankine cycle 31 configured such that a coolant 30 circulates through a cooling pump 25 , an evaporator 26 , an expander 28 linked to an electric power generator 27 , and a condenser 29 in this order.
  • a cooling side of the condenser 29 in this Rankine cycle 31 links an inlet side of the water pump 21 to an outlet side of the sub-radiator 2 .
  • Outlet-side cooling water 32 of the sub-radiator 2 (some of the engine-main-body cooling water 18 and the EGR-cooler cooling water 19 after cooling) flows into the cooling side.
  • a heating side of the evaporator 26 of the Rankine cycle 31 is arranged in the intake passage 5 between the compressor 7 and the EGR passage 14 .
  • the compressed air 8 compressed to high temperature (for example, approximately 160° C.) by the compressor 7 flows to the heating side.
  • the coolant 30 which circulates through the Rankine cycle 31 is compressed by the cooling pump 25 , and heated at a constant pressure by the high-temperature compressed air 8 in the evaporator 26 , so that the coolant 30 is turned into an over-heated vapor at high pressure. While the coolant 30 is subjected to an adiabatic expansion in the expander 28 , an electric power is generated by driving the rotation of the electric power generator 27 . Then, the coolant 30 is cooled at a constant pressure by the outlet-side cooling water 32 of the sub-radiator 2 in the condenser 29 , and is returned to a liquid. The electric power generated by the electric power generator 27 is charged in a battery (not shown) and serves as a power source for electronic parts of the vehicle 1 .
  • the engine-main-body cooling water 18 is not used as the heating source for the evaporator 26 in the Rankine cycle 31 , but the compressed air 8 having a higher temperature is used instead. This makes it possible to improve the power recovering performance of the Rankine cycle 31 , thereby improving the fuel economy.
  • the power generation by an alternator is reduced because of an increased amount of electric power generated in the electric power generator 27 whose rotation is driven by the expander 28 in the Rankine cycle 31 .
  • a load to the engine main body 10 is reduced, improving the fuel economy.
  • the cooling target of the engine cooling system of the present invention is not limited to the diesel engine 4 as described above, and includes a gasoline engine, as well.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Supercharger (AREA)
US15/022,699 2013-10-30 2014-10-03 Engine cooling system Abandoned US20160230643A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013225547A JP2015086779A (ja) 2013-10-30 2013-10-30 エンジン冷却システム
JP2013-225547 2013-10-30
PCT/JP2014/076556 WO2015064302A1 (ja) 2013-10-30 2014-10-03 エンジン冷却システム

Publications (1)

Publication Number Publication Date
US20160230643A1 true US20160230643A1 (en) 2016-08-11

Family

ID=53003915

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/022,699 Abandoned US20160230643A1 (en) 2013-10-30 2014-10-03 Engine cooling system

Country Status (5)

Country Link
US (1) US20160230643A1 (de)
EP (1) EP3064734B1 (de)
JP (1) JP2015086779A (de)
CN (1) CN105492734A (de)
WO (1) WO2015064302A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180298853A1 (en) * 2017-04-14 2018-10-18 Aisan Kogyo Kabushiki Kaisha Egr cooling apparatus
US20190032954A1 (en) * 2016-06-13 2019-01-31 Enginuity Power Systems Combination systems and related methods for providing power, heat and cooling
US20190203615A1 (en) * 2016-05-10 2019-07-04 Robert Bosch Gmbh Waste-heat utilization assembly of an internal combustion engine, and method for operating the waste-heat utilization assembly
US10830121B2 (en) 2016-01-15 2020-11-10 Scania Cv Ab Cooling system for a combustion engine and a WHR system
US10955168B2 (en) * 2017-06-13 2021-03-23 Enginuity Power Systems, Inc. Methods systems and devices for controlling temperature and humidity using excess energy from a combined heat and power system
US11193694B2 (en) * 2016-06-13 2021-12-07 Enginuity Power Systems Combination systems and related methods for providing power, heat and cooling
US11220931B2 (en) 2017-06-07 2022-01-11 Scania Cv Ab Cooling system for a combustion engine and a WHR system
US11352930B2 (en) * 2019-02-21 2022-06-07 Enginuity Power Systems, Inc. Muffler and catalytic converters for combined heating and power systems

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6593056B2 (ja) * 2015-09-17 2019-10-23 いすゞ自動車株式会社 熱エネルギー回収システム
SE539403C2 (en) * 2016-01-15 2017-09-12 Scania Cv Ab A cooling system for a combustion engine and a WHR system
EP3293372A1 (de) * 2016-07-25 2018-03-14 Panasonic Intellectual Property Management Co., Ltd. Rankine-zyklus-system
DE102016217731A1 (de) * 2016-09-16 2018-03-22 Robert Bosch Gmbh Abwärmerückgewinnungssystem
SE540324C2 (en) * 2016-10-28 2018-06-26 Scania Cv Ab A cooling system for cooling a combustion engine and a WHR system
CN108487944A (zh) * 2018-02-24 2018-09-04 安徽全科技有限公司 车辆节能发电系统
FR3080887B1 (fr) 2018-05-04 2021-07-30 Ifp Energies Now Systeme de refroidissement d'un moteur avec deux thermostats et integrant un circuit selon un cycle de rankine

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US20070227472A1 (en) * 2006-03-23 2007-10-04 Denso Corporation Waste heat collecting system having expansion device
US20140007575A1 (en) * 2010-08-11 2014-01-09 Cummins Intellectual Property, Inc. Split radiator design for heat rejection optimization for a waste heat recovery system
US20160084115A1 (en) * 2012-07-24 2016-03-24 Electratherm, Inc. Heat energy distribution systems and methods for power recovery
US9745887B2 (en) * 2013-10-30 2017-08-29 Isuzu Motors Limited Engine cooling system

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JP2008008224A (ja) * 2006-06-29 2008-01-17 Denso Corp 廃熱利用装置
JP2008255923A (ja) * 2007-04-06 2008-10-23 Sanden Corp 内燃機関の廃熱利用装置
AT507096B1 (de) * 2008-12-10 2010-02-15 Man Nutzfahrzeuge Oesterreich Antriebseinheit mit kühlkreislauf und separatem wärmerückgewinnungskreislauf
SE535877C2 (sv) * 2010-05-25 2013-01-29 Scania Cv Ab Kylarrangemang hos ett fordon som drivs av en överladdad förbränningsmotor
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Publication number Priority date Publication date Assignee Title
US20040020206A1 (en) * 2001-05-07 2004-02-05 Sullivan Timothy J. Heat energy utilization system
US20070227472A1 (en) * 2006-03-23 2007-10-04 Denso Corporation Waste heat collecting system having expansion device
US20140007575A1 (en) * 2010-08-11 2014-01-09 Cummins Intellectual Property, Inc. Split radiator design for heat rejection optimization for a waste heat recovery system
US20160084115A1 (en) * 2012-07-24 2016-03-24 Electratherm, Inc. Heat energy distribution systems and methods for power recovery
US9745887B2 (en) * 2013-10-30 2017-08-29 Isuzu Motors Limited Engine cooling system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10830121B2 (en) 2016-01-15 2020-11-10 Scania Cv Ab Cooling system for a combustion engine and a WHR system
US20190203615A1 (en) * 2016-05-10 2019-07-04 Robert Bosch Gmbh Waste-heat utilization assembly of an internal combustion engine, and method for operating the waste-heat utilization assembly
US10767514B2 (en) * 2016-05-10 2020-09-08 Robert Bosch Gmbh Waste-heat utilization assembly of an internal combustion engine, and method for operating the waste-heat utilization assembly
US20190032954A1 (en) * 2016-06-13 2019-01-31 Enginuity Power Systems Combination systems and related methods for providing power, heat and cooling
US10605483B2 (en) * 2016-06-13 2020-03-31 Enginuity Power Systems Combination systems and related methods for providing power, heat and cooling
US11193694B2 (en) * 2016-06-13 2021-12-07 Enginuity Power Systems Combination systems and related methods for providing power, heat and cooling
US20180298853A1 (en) * 2017-04-14 2018-10-18 Aisan Kogyo Kabushiki Kaisha Egr cooling apparatus
US11220931B2 (en) 2017-06-07 2022-01-11 Scania Cv Ab Cooling system for a combustion engine and a WHR system
US10955168B2 (en) * 2017-06-13 2021-03-23 Enginuity Power Systems, Inc. Methods systems and devices for controlling temperature and humidity using excess energy from a combined heat and power system
US11352930B2 (en) * 2019-02-21 2022-06-07 Enginuity Power Systems, Inc. Muffler and catalytic converters for combined heating and power systems

Also Published As

Publication number Publication date
EP3064734A1 (de) 2016-09-07
EP3064734B1 (de) 2020-07-29
JP2015086779A (ja) 2015-05-07
CN105492734A (zh) 2016-04-13
WO2015064302A1 (ja) 2015-05-07
EP3064734A4 (de) 2017-06-07

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AS Assignment

Owner name: ISUZU MOTORS LIMITED, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HONDA, TAKU;REEL/FRAME:038044/0259

Effective date: 20160304

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION