CN102086797A - Exhaust heat recovery system of vehicle and method thereof - Google Patents

Exhaust heat recovery system of vehicle and method thereof Download PDF

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Publication number
CN102086797A
CN102086797A CN2010102527868A CN201010252786A CN102086797A CN 102086797 A CN102086797 A CN 102086797A CN 2010102527868 A CN2010102527868 A CN 2010102527868A CN 201010252786 A CN201010252786 A CN 201010252786A CN 102086797 A CN102086797 A CN 102086797A
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CN
China
Prior art keywords
coolant
freezing mixture
waste
gas heat
valve
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.)
Pending
Application number
CN2010102527868A
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Chinese (zh)
Inventor
黄淳炫
李凤相
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.)
Hyundai Motor Co
Kia Corp
Original Assignee
Hyundai Motor Co
Kia Motors Corp
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 Hyundai Motor Co, Kia Motors Corp filed Critical Hyundai Motor Co
Publication of CN102086797A publication Critical patent/CN102086797A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P7/16Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02Profiting from waste heat of exhaust gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P7/16Controlling of coolant flow the coolant being liquid by thermostatic control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00Cooling circuits using auxiliaries
    • F01P2060/08Cabin heater
    • 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The present invention relates to an exhaust heat recovery system of a vehicle and a method thereof, wherein an exhaust heat recovery device may include a radiator disposed at a main line and through which hot coolant circulates; an exhaust heat exchanger transferring exhaust heat of an engine to coolant; a first valve selectively circulating the coolant to the main line or a bypass line; a water pump connected to the first valve and circulating the coolant; a coolant temperature sensor detecting temperature of the coolant; a second valve connected to the water pump and disposed at a distributing line to distribute the coolant supplied by the water pump to the engine and the exhaust heat exchanger; and a control portion that controls the first and second valves depending on the temperature of the coolant so as to adjust coolant amount circulating in the engine and the exhaust heat exchanger and coolant amount circulating in the radiator and the bypass line.

Description

The waste-gas heat reclaiming system of vehicle and waste-gas heat recovery method
The cross reference of related application
The application requires the preference of the korean patent application submitted in Korea S Department of Intellectual Property on December 2nd, 2009 10-2009-0118730 number, and the full content of this application is incorporated into this all purposes that are used for quoting by this.
Technical field
The present invention relates to the exhaust heat recovery device of vehicle.More specifically, the present invention relates to reclaim the exhaust heat recovery device of waste-gas heat with the minimizing fuel consumption, and the waste-gas heat recovery method.
Background technique
Generally speaking, the vehicular manufacturer is studying the approach that reduces waste gas and fuel consumption.
When the catalyzer heap(ed) capacity increases and exhaust gas recirculation (EGR) cooler capacity becomes bigger when satisfying waste gas and regulate, also increased the manufacture cost of vehicle simultaneously.
Variable water pump prevents that unnecessary cooling from taking place, thereby has reduced the preheat time of motor and reduced fuel consumption.
In addition, be developed and using exhaust heat recovery device to reclaim the exhaust energy of loss, wherein exhaust heat recovery device is arranged on the downstream side of exhaust gas catalyst, with the heat transfer of waste gas to freezing mixture, thereby reduced preheat time of motor.
The information that is disclosed in background parts of the present invention only is intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or hint in any form that this information constitutes being the known prior art of persons skilled in the art.
Summary of the invention
All aspects of of the present invention relate to the exhaust heat recovery device that vehicle is provided, it has the following advantages: in engine operation process, change coolant circulating amount in waste-gas heat exchanger and motor on one's own initiative by temperature, reduce fuel consumption and improve exhaust mass according to freezing mixture.
In other words, a spot of freezing mixture circulates in motor and a large amount of freezing mixtures circulates in the waste-gas heat exchanger, thereby improves the energy efficiency at the early stage of cold starting.
In one aspect of the invention, the exhaust heat recovery device of vehicle can comprise radiator, and this radiator is arranged at main line, thereby and the freezing mixture of heat circulate by this radiator and distribute its heat; The waste-gas heat exchanger, its waste-gas heat with motor is passed to freezing mixture; First valve, its described circulate coolant that optionally makes the calory burning that absorbs motor is to described main line or branch line; Water pump, it is connected to described first valve and makes described circulate coolant; Coolant temperature sensor, it detects the temperature of described freezing mixture; Second valve, it is connected to described water pump, and is arranged at distributed lines and is provided to the freezing mixture of described motor and described waste-gas heat exchanger by described water pump to distribute; And control section, it is according to controlling described first and second valves by the temperature of the detected described freezing mixture of described coolant temperature sensor, thereby is adjusted in described motor and the described waste-gas heat exchanger coolant circulating amount and coolant circulating amount in described radiator and described branch line.
Described waste-gas heat exchanger can be arranged on the downstream side of exhaust gas catalyst.
Described control section can be controlled described second valve, thereby when the temperature of described freezing mixture during less than first predetermined value, the coolant circulating quantitative change must be greater than coolant circulating amount in described motor in described waste-gas heat exchanger, wherein said control section is controlled described first valve, thereby the circulation of the freezing mixture in described radiator is closed and the circulation of the freezing mixture in described branch line is opened.
Described control section can be controlled described second valve, thereby when described coolant temperature is higher than second predetermined value, the coolant circulating amount minimizes or closes in described waste-gas heat exchanger, coolant circulating amount maximization in described motor, wherein said control section is controlled described first valve, thereby the circulation of the freezing mixture in described radiator is opened and the circulation of the freezing mixture in described branch line is closed.
Supplementary equipment can be connected to described branch line.
In another aspect of this invention, the waste-gas heat recovery method of vehicle can comprise: detect the temperature of freezing mixture and the detected temperature and first predetermined temperature value are compared; Regulate the path of described freezing mixture, thereby when the temperature of described freezing mixture during less than first predetermined temperature value, the described amount of coolant of circuit is greater than coolant circulating amount in motor in the waste-gas heat exchanger; And control described freezing mixture, make when the temperature of described freezing mixture is higher than second predetermined temperature value, the coolant circulating amount is greater than coolant circulating amount in described waste-gas heat exchanger in described motor, wherein second valve can be arranged at distributed lines, this distributed lines is connected to water pump, with according to the temperature of described freezing mixture with described coolant distribution to described motor and described waste-gas heat exchanger.
Described waste-gas heat recovery method can also comprise when detected temperature is lower than described first predetermined temperature value, make described circulate coolant to branch line; And when detected temperature is higher than described second predetermined temperature value, make described circulate coolant to radiator, wherein said first predetermined temperature value is lower than described second predetermined temperature value, and wherein first valve can be connected to water pump and optionally regulate the circulation of described freezing mixture to described branch line and described radiator.
In aforesaid the present invention, in the early stage of engine start, described freezing mixture is actively controlled shortening the preheat time of described motor, thereby reduces fuel consumption and stable waste gas.
In the present invention, do not add catalyzer, also can guarantee stable waste gas, the temperature of the motor that can raise fast reduces oil drag fast, makes the minimise wear of parts, thereby has improved its durability.
Method and apparatus of the present invention has other characteristic and advantage, these characteristics and advantage will be conspicuous from the accompanying drawing that is incorporated herein and embodiment subsequently, perhaps will carry out set forth in detail in accompanying drawing that is incorporated herein and embodiment subsequently, these the drawings and specific embodiments are used to explain certain principles of the present invention jointly.
Description of drawings
The exemplary exhaust heat recovery device of the schematically illustrated vehicle according to the invention of Fig. 1.
Fig. 2 shows the flow chart according to the exemplary waste-gas heat callback course in vehicle of the present invention.
Should be appreciated that accompanying drawing has presented the expression of to a certain degree simplifying of each feature of setting forth basic principle of the present invention, thereby do not need to draw in proportion.Specific design feature of the present invention disclosed herein comprises for example specific dimensions, orientation, position and shape, will partly be determined by the application and the Environmental Conditions of concrete intention.
In the accompanying drawings, reference character is represented identical or equivalent part of the present invention in whole several accompanying drawings.
Embodiment
Below will be in detail with reference to different embodiments of the invention, example of the present invention is shown in the drawings and be described below.Though describe the present invention in conjunction with exemplary embodiment, should be appreciated that this description is not intended to the present invention is limited to those exemplary embodiments.On the contrary, the present invention is intended to not only cover exemplary embodiment, also covers and can be included in that various in the spirit and scope of the present invention that limited by claims substitute, improvement, equivalent structure and other embodiments.
In following detailed description, only, illustrate and described some illustrative embodiments of the present invention simply by the mode of elaboration.
The exhaust heat recovery device of the schematically illustrated vehicle according to exemplary embodiment of the invention of Fig. 1.
The present invention includes motor 10, radiator 20, waste-gas heat exchanger 30, supplementary equipment 40, water pump 50, coolant temperature sensor 60, control section 70, first valve 80 and second valve 90.
Radiator 20 is arranged at main line 22, thereby when motor 10 is enough warm, distributes calory burning.
Waste-gas heat exchanger 30 is arranged on the downstream side of catalyzer, and freezing mixture is passed to freezing mixture by these waste-gas heat exchanger 30 circulations with the waste-gas heat with motor 10, thereby has reduced the preheat time of motor 10.
Supplementary equipment 40 comprises heater, and freezing mixture is by this heater circulation, thus the heating vehicle inside.
Water pump 50 moves changeably, especially, if coolant temperature is less than predetermined value, water pump 50 does not move, and motor 10 operation, thereby by preventing that unnecessary cooling from having reduced the preheat time of motor 10, and reduced fuel consumption by reducing lubricated oil drag.
Temperature transducer 60 detects the temperature of coolant circulating, and detected signal is passed to control section 70.
Pass through the temperature of temperature transducer 60 detected freezing mixtures during according to motor 10 operations, control section 70 control of pump 50, first valve 80 and second valve 90, thereby the preheat time of minimizing motor 10.
First valve 80 is arranged at the recycle circuit of freezing mixture, thereby determines the peripheral passage of freezing mixture according to the control of control section 80.
For example, under motor 10 fully-warmed-up cruising situations, freezing mixture circulates by radiator 20, does not have at motor 10 under the improper travel situations of preheating, and freezing mixture can not circulate by radiator 20, but flows through branch line 42.
In this process, freezing mixture can circulate by supplementary equipment 40 according to travel situations.
Second valve 90 is motor-operated control valves, is arranged at the distributed lines 33 of water pump 50, motor 10 and waste-gas heat exchanger 30, thereby by regulate the path by water pump 50 coolant circulating according to the control of control section 70.
For example, there are not abundant heating or coolant temperature to be lower than under the situation of predetermined temperature at motor 10, according to the control of control section 70, in motor 10 the coolant circulating amount less than coolant circulating amount in waste-gas heat exchanger 30, thereby cause the rapid rising of coolant temperature.
Equally, be higher than under the situation of predetermined temperature in motor 10 abundant heating or coolant temperature, according to the control of control section 70, coolant circulating amount maximization in motor 10, the coolant circulating amount minimizes or closes in waste-gas heat exchanger 30.
First valve 80 and second valve 90 are motor-operated control valve or the general thermostats that move by control section 70 controls.
With reference to figure 2, comprise that of the present invention the operating in hereinafter of above-mentioned functions makes an explanation.
Fig. 2 shows the flow chart according to the waste-gas heat callback course in vehicle of exemplary embodiment of the invention.
Under the situation that motor 10 cuts out (S101), if detect the starting (S102) of motor 10, the predetermined temperature (A ℃) when control section detects the coolant temperature (S103) that coolant temperature sensor 60 provides and determines whether coolant temperature less than the cold starting situation (S104).
If coolant temperature is higher than predetermined temperature (A ℃) in S104, first valve 80 is carried out general circulate coolant control (S105) according to coolant temperature, thereby freezing mixture circulates in radiator 20.
Yet, if coolant temperature is less than predetermined temperature (A ℃) in S104, control section is determined motor (S106) under cold situation, and controls first valve 80 (S107), thereby circulation in radiator 20 of freezing mixture, but by branch line 42 circulate (S108).
In addition, control section 70 operation water pumps 50 are so that circulate coolant (S109), control second valve 90 (S110) simultaneously, thereby the coolant circulating quantitative change must be less than coolant circulating amount in waste-gas heat exchanger 30 in motor 10, thereby make coolant temperature raise fast (S111).
Therefore, calory burning and the waste-gas heat exchanger 30 of coolant temperature by motor raises, and then control section determines whether coolant temperature is higher than as the predetermined temperature (B ℃) of the criterion of judging the preheating situation (S112).
If coolant temperature is higher than the predetermined temperature (B ℃) as the criterion of judging the preheating situation in S112, control section 70 determines that motors 10 are hot (S113), and control first valve 80 (S114) so that freezing mixture by radiator 20 circulate (S115).
Simultaneously, control section is controlled second valve 90 (S116), and the coolant circulating amount minimizes or closes in waste-gas heat exchanger 30 thereby make, and makes coolant circulating amount maximization (S117) in motor 10.
Aforementioned description to concrete exemplary of the present invention is for the purpose with illustration is described.These descriptions are not to think limit the present invention, perhaps the present invention are defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected to be to explain certain principles of the present invention and practical application thereof with purpose of description, thereby make others skilled in the art can realize and utilize various exemplary of the present invention and various selection and change.Scope of the present invention is intended to be limited by appending claims and equivalents thereof.

Claims (11)

1. the exhaust heat recovery device of a vehicle comprises:
Radiator, this radiator is arranged at main line, thereby and the freezing mixture of heat circulate by this radiator and distribute its heat;
The waste-gas heat exchanger, its waste-gas heat with motor is passed to freezing mixture;
First valve, its described circulate coolant that optionally makes the calory burning that absorbs motor is to described main line or branch line;
Water pump, it is connected to described first valve and makes described circulate coolant;
Coolant temperature sensor, it detects the temperature of described freezing mixture;
Second valve, it is connected to described water pump, and is arranged at distributed lines and is provided to the freezing mixture of described motor and described waste-gas heat exchanger by described water pump to distribute; And
Control section, this control section is according to controlling described first and second valves by the temperature of the detected described freezing mixture of described coolant temperature sensor, thereby is adjusted in described motor and the described waste-gas heat exchanger coolant circulating amount and coolant circulating amount in described radiator and described branch line.
2. the exhaust heat recovery device of vehicle according to claim 1, wherein said waste-gas heat exchanger is arranged on the downstream side of exhaust gas catalyst.
3. the exhaust heat recovery device of vehicle according to claim 1, wherein said control section is controlled described second valve, thereby when the temperature of described freezing mixture during less than first predetermined value, the coolant circulating quantitative change must be greater than coolant circulating amount in described motor in described waste-gas heat exchanger.
4. the exhaust heat recovery device of vehicle according to claim 3, wherein said control section is controlled described first valve, thereby the circulation of the freezing mixture in described radiator close, and the circulation of the freezing mixture in described branch line is opened.
5. the exhaust heat recovery device of vehicle according to claim 1, wherein said control section is controlled described second valve, thereby when described coolant temperature is higher than second predetermined value, the coolant circulating amount minimizes or closes in described waste-gas heat exchanger, coolant circulating amount maximization in described motor.
6. the exhaust heat recovery device of vehicle according to claim 5, wherein said control section is controlled described first valve, thereby the circulation of the freezing mixture in described radiator open, and the circulation of the freezing mixture in described branch line is closed.
7. the exhaust heat recovery device of vehicle according to claim 1, wherein supplementary equipment is connected to described branch line.
8. the waste-gas heat recovery method of a vehicle comprises:
Detect the temperature of freezing mixture and the detected temperature and first predetermined temperature value are compared;
Regulate the path of described freezing mixture, thereby when the temperature of described freezing mixture during less than first predetermined temperature value, the described amount of coolant of circuit is greater than coolant circulating amount in motor in the waste-gas heat exchanger; And
Control described freezing mixture, thereby when the temperature of described freezing mixture was higher than second predetermined temperature value, the coolant circulating amount was greater than coolant circulating amount in described waste-gas heat exchanger in described motor.
9. the waste-gas heat recovery method of vehicle according to claim 8, comprise that also second valve is arranged at distributed lines, this distributed lines is connected to water pump, with according to the temperature of described freezing mixture with described coolant distribution to described motor and described waste-gas heat exchanger.
10. the waste-gas heat recovery method of vehicle according to claim 8 also comprises:
When detected temperature is lower than described first predetermined temperature value, make described circulate coolant to branch line; And
When detected temperature is higher than described second predetermined temperature value, make described circulate coolant to radiator,
Wherein said first predetermined temperature value is lower than described second predetermined temperature value.
11. the waste-gas heat recovery method of vehicle according to claim 10 also comprises first valve, this first valve is connected to water pump and optionally regulates the circulation of described freezing mixture to described branch line and described radiator.
CN2010102527868A 2009-12-02 2010-08-13 Exhaust heat recovery system of vehicle and method thereof Pending CN102086797A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20090118730A KR101509685B1 (en) 2009-12-02 2009-12-02 Exhaust heat recovery system of vehicle and method
KR10-2009-0118730 2009-12-02

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CN102086797A true CN102086797A (en) 2011-06-08

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US (1) US20110126783A1 (en)
KR (1) KR101509685B1 (en)
CN (1) CN102086797A (en)
DE (1) DE102010037090A1 (en)

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CN103603718A (en) * 2013-02-01 2014-02-26 湖北鹰牌动力科技有限公司 Engine coolant waste-heat utilizing generator set
CN104047697A (en) * 2013-03-15 2014-09-17 卡特彼勒公司 System and Method for Post-Shutdown Temperature Management and Purge
CN104047648A (en) * 2013-03-12 2014-09-17 德扬技术控股有限公司 Combined heat and power (CHP) system
CN104583555A (en) * 2012-08-13 2015-04-29 丰田自动车株式会社 Coolant control device
CN104989515A (en) * 2015-08-03 2015-10-21 湖州新奥利吸附材料有限公司 Special heat exchange device for internal combustion engine
CN105697126A (en) * 2014-12-15 2016-06-22 现代自动车株式会社 Vehicle exhaust heat recovery system and method
CN105736115A (en) * 2014-09-19 2016-07-06 现代自动车株式会社 Cooling system for vehicle and controlling method thereof
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CN104583555A (en) * 2012-08-13 2015-04-29 丰田自动车株式会社 Coolant control device
CN103603718A (en) * 2013-02-01 2014-02-26 湖北鹰牌动力科技有限公司 Engine coolant waste-heat utilizing generator set
CN104047648A (en) * 2013-03-12 2014-09-17 德扬技术控股有限公司 Combined heat and power (CHP) system
CN104047697A (en) * 2013-03-15 2014-09-17 卡特彼勒公司 System and Method for Post-Shutdown Temperature Management and Purge
CN105736115A (en) * 2014-09-19 2016-07-06 现代自动车株式会社 Cooling system for vehicle and controlling method thereof
CN105697126A (en) * 2014-12-15 2016-06-22 现代自动车株式会社 Vehicle exhaust heat recovery system and method
CN105697126B (en) * 2014-12-15 2019-12-06 现代自动车株式会社 Vehicle exhaust heat recovery system and method
CN104989515A (en) * 2015-08-03 2015-10-21 湖州新奥利吸附材料有限公司 Special heat exchange device for internal combustion engine
CN104989515B (en) * 2015-08-03 2018-04-27 湖州新奥利吸附材料有限公司 A kind of special heat-exchanger rig of internal combustion engine
CN110219725A (en) * 2018-03-01 2019-09-10 通用汽车环球科技运作有限责任公司 Waste gas heat, which recovers energy, extracts strategy
CN110219725B (en) * 2018-03-01 2021-08-31 通用汽车环球科技运作有限责任公司 Exhaust gas heat recovery energy extraction strategy

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