[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN102937057B - A kind of engine exhaust-gas recirculating system - Google Patents

A kind of engine exhaust-gas recirculating system Download PDF

Info

Publication number
CN102937057B
CN102937057B CN201210419907.2A CN201210419907A CN102937057B CN 102937057 B CN102937057 B CN 102937057B CN 201210419907 A CN201210419907 A CN 201210419907A CN 102937057 B CN102937057 B CN 102937057B
Authority
CN
China
Prior art keywords
cooling water
egr
exhaust
engine
gas
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.)
Active
Application number
CN201210419907.2A
Other languages
Chinese (zh)
Other versions
CN102937057A (en
Inventor
郝学信
屈伟
赵勇
刘祖勤
刘占强
崔志强
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.)
Great Wall Motor Co Ltd
Original Assignee
Great Wall Motor Co 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 Great Wall Motor Co Ltd filed Critical Great Wall Motor Co Ltd
Priority to CN201210419907.2A priority Critical patent/CN102937057B/en
Publication of CN102937057A publication Critical patent/CN102937057A/en
Application granted granted Critical
Publication of CN102937057B publication Critical patent/CN102937057B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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

Landscapes

  • Exhaust-Gas Circulating Devices (AREA)

Abstract

A kind of engine exhaust-gas recirculating system, for reducing the content of NOx in diesel-engined vehicle effulent.It comprises cooling water circulation and exhaust gas recirculation mechanism, described cooling water circulation is communicated with car load radiator, cooling water circulation regulates the temperature of EGR gas under Engine ECU controls, and described exhaust gas recirculation mechanism is arranged between enmgine exhaust and engine cylinder cover gas inlet passage.The invention solves the defect that existing engines exhaust gas recirculation (EGR) system exists, it can reduce the content of NOx in Vehicular exhaust greatly, meets the combination property that vehicular emission standards required, improved motor.

Description

A kind of engine exhaust-gas recirculating system
Technical field
The present invention relates to a kind of engine exhaust-gas recirculating system, especially a kind of gas recirculation system of vehicle-mounted diesel engine, belongs to combustion engine technology field.
Background technique
Carry the automobile of diesel engine, because engine air-fuel ratio is large, fuel burns under high-temperature oxygen-enriched condition, causes in tail gas containing a large amount of NOx.And NOx is the material to human health, in automobile emissions standards, carried out strict restriction to its content, therefore process transforms the NOx in tail gas is one of main task improving diesel engine emissions performance.At present, reducing NOx content in emissions from engines is generally absorb two kinds of modes by the conversion of engines exhaust gas recirculation (EGR) and after-treatment device to realize.
Engines exhaust gas recirculation (EGR) device is because being easy to arrange, input cost is low, less to the change of other component of motor, is adopted by a lot of diesel-engined vehicle.Waste gas after burning is introduced cylinder and is participated in burning by the EGR device of diesel engine again, reduces the NOx content in waste gas.In order to ensure the performance of motor, after diesel engine installs EGR device, also need to arrange facility introducing waste gas being carried out to cooling processing, engines exhaust gas recirculation (EGR) system of Erecting and improving.But existing engines exhaust gas recirculation (EGR) system, also exists defect in the following areas: one is that the shell cooler volume that adopts is large, is unfavorable for the layout of motor; Two is that cooling capacity changes with engine speed change, and cause egr system excess coolant sometimes, excessively cold condensate exhaust gases thing increases, make EGR valve carbon distribution serious, even clamping stagnation, egr system cooling is sometimes not enough, the air inflow that overheated waste gas makes motor total reduces, and affects engine performance; Three is that the circulating water of motor enters egr system under motor short circle state, causes cycle of engine coolant-temperature gage to reduce, extends engine warm-up time; Four is do not have cooling water channel on EGR valve seat, and EGR valve seat produces deformation under high heat energy impacts, and in order to reduce failure risk, most EGR valve seat adopts stainless steel, and cost is improved; Five is for avoiding engine exhaust coagulant on the impact of EGR, the waste gas that EGR air outlet temperature is higher, cause high-temperature and fresh air mixing, the air inflow making motor total reduces, and not only affects engine performance, and reduces the durability of plastic material intake manifold.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of and can meet the engine exhaust-gas recirculating system that emission standard required, improved engine performance.
Problem of the present invention realizes with following technical proposals:
A kind of engine exhaust-gas recirculating system, it comprises cooling water circulation and exhaust gas recirculation mechanism, described cooling water circulation is communicated with car load radiator, cooling water circulation regulates the temperature of EGR gas under Engine ECU controls, and described exhaust gas recirculation mechanism is arranged between enmgine exhaust and engine cylinder cover gas inlet passage.
Above-mentioned engine exhaust-gas recirculating system, the cooling water circulation pipeline that described cooling water circulation comprises cooler for recycled exhaust gas, electronic water pump and is communicated with car load radiator, described cooler for recycled exhaust gas is that plate sticks up the U-shaped cooler of formula, be provided with cooling water passage and cycle gas passage therein, described cooling water passage and cooling water circulation pipeline connection, described cycle gas passage is communicated with exhaust gas recirculation mechanism.
Above-mentioned engine exhaust-gas recirculating system, described electronic water pump is connected in cooling water circulation pipeline, and electronic water pump arranges the flow control valve that can be controlled by Engine ECU.
Above-mentioned engine exhaust-gas recirculating system, described exhaust gas recirculation mechanism comprises EGR assembly and exhaust gas recirculation circuit, described EGR assembly is made up of EGR valve, EGR valve seat and EGR bypass valve, described EGR valve outlet end is provided with the temperature transducer be communicated with Engine ECU, and its entrance point is communicated with EGR valve seat.
Above-mentioned engine exhaust-gas recirculating system, described EGR valve seat is provided with the suction port be communicated with cooler for recycled exhaust gas cycle gas passage and EGR bypass valve respectively, EGR valve seat is also provided with the air outlet be communicated with EGR valve, EGR valve seat is also provided with the cooling water channel with cooling water circulation pipeline connection.
Above-mentioned engine exhaust-gas recirculating system, described EGR bypass valve is arranged between enmgine exhaust and EGR valve seat, and it and cooler for recycled exhaust gas are parallel-connection structure.
Above-mentioned engine exhaust-gas recirculating system, described engine cylinder cover gas inlet passage is connected with engine intake manifold, and it is arranged in the below of outfall sewer in engine cylinder cover.
Exhaust gas temperature information is passed to Engine ECU by temperature transducer by the present invention, is regulated the cooling water flow of egr system, egr system cooling capacity is not affected by engine speed by the flow control valve of Engine ECU control electronic water pump; The present invention adopts plate to stick up the U-shaped cooler of formula, under the prerequisite not changing cooler volume, can promote cooling capacity, meet the cooling requirement of high ER EGR Rate; Egr system of the present invention quotes cooling water from car load radiator, under motor short circle pattern, shortens engine warm-up time, under motor major cycle pattern, does not produce considerable influence, ensure that the normal work of motor to engine-cooling system; Adopt structure of the present invention to make EGR gas through the cooling twice of cylinder cap exhaust steam passage cooling water channel, reduce further exhaust gas temperature, thus increase the air inflow of motor, avoid the impact of high-temp waste gas on intake manifold durability simultaneously; The present invention devises cooling water channel on EGR valve seat, and reduce the failure risk that the high temperature deformation of EGR valve seat causes, EGR valve seat can adopt cast aluminium material, decreases manufacture cost.In a word, the invention solves the defect that existing engines exhaust gas recirculation (EGR) system exists, it can reduce the content of NOx in Vehicular exhaust greatly, meets the combination property that vehicular emission standards required, improved motor.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is main structure schematic diagram of the present invention;
Fig. 2 is working principle block diagram of the present invention;
Fig. 3 is EGR gas circulation schematic diagram;
Fig. 4 is cooling water circulation schematic diagram.
In figure, each list of reference numerals is: 1, engine cylinder cover, 2, gas exhaust manifold, 3, cooler for recycled exhaust gas, 4, EGR bypass valve, 5, EGR valve seat, 6, EGR valve, 7, electronic water pump, 7-1, flow control valve, 8, Engine ECU, 9, temperature transducer, 10, intake manifold, 11, car load radiator, 12, engine cylinder cover gas inlet passage, 13, cooling water circulation pipeline, 14, exhaust gas recirculation circuit, 15, Engine ECU signal transmission line.
Embodiment
Referring to Fig. 1, Fig. 2, the present invention includes cooling water circulation and exhaust gas recirculation mechanism, described cooling water circulation is communicated with car load radiator 11, cooling water circulation regulates the temperature of EGR gas under Engine ECU 8 controls, and described exhaust gas recirculation mechanism is arranged between enmgine exhaust 2 and engine cylinder cover gas inlet passage 12.The present invention adopts electronic water pump 7, the signal of Engine ECU 8 (or by discharging the amount of nitrogen oxides that detection system detects) is sent to control the cooling water flow of electronic water pump 7 by temperature transducer 9, realize the control to the cooling capacity of egr system, when EGR gas temperature is higher than actual demand temperature, regulate electronic water pump 7, strengthen cooling water flow, strengthen its cooling capacity; When EGR gas temperature is lower than actual demand temperature, regulate electronic water pump 7, reduce cooling water flow, reduce its cooling capacity.By above measure, keep motor to be in optimum working state, improve the emission performance of motor.
Referring to Fig. 1, the present invention adopts plate to stick up the U-shaped cooler for recycled exhaust gas 3 of formula, cooling effectiveness can improve more than 90%, when not changing cooler for recycled exhaust gas 3 volume, promote cooling capacity, reach the object adapted with higher EGR rate, that is: more waste gas can be made to reach participation combustion temperature, meet the requirement of more maximum discharge standard.
Referring to Fig. 2, Fig. 4, under motor short circle pattern, the electronic water pump 7 of egr system draws water from car load radiator 11, flows through cooler for recycled exhaust gas 3, EGR valve seat 5 returns car load radiator 11, without the cooling water of motor short circle, shorten warm-up period; Under motor major cycle pattern, still by above-mentioned cooling water circulation line, EGR gas is cooled, the cool cycles of engine cylinder-body and cylinder cap self is not had an impact.The present invention is provided with cooling water channel on EGR valve seat 5, when flowing through EGR valve seat 5 exhaust gas temperature and being higher, particularly under egr system bypass mode, can cool EGR valve seat 5, reduce the failure risk that EGR valve seat (5) causes due to temperature distortion, EGR valve seat 5 can select casting aluminium material simultaneously, has saved cost.
Referring to Fig. 2, Fig. 3, the phenomenon such as carbon distribution and particulate matter precipitation can be produced when EGR gas temperature is lower, when these materials can be attached in EGR valve 6, easily cause EGR valve 6 clamping stagnation, in order to avoid this phenomenon in prior art, the waste gas after cooler for recycled exhaust gas 3 can only be allowed still to keep higher temperature, such result is that the waste gas of high temperature mixes with fresh air, mixture temperature is higher, the total air inflow entering cylinder is reduced, have impact on the performance of motor, the mixed gas of heat is also unfavorable for the reduction of oxynitrides content simultaneously.The below of the present invention's outfall sewer in engine cylinder cover 1 is provided with engine cylinder cover exhaust steam passage 12, not only simplify the layout of exhaust gas recirculation circuit 14, and cool further by the waste gas after EGR valve 6, namely cooling twice has been carried out to EGR gas, guaranteeing under the prerequisite that EGR valve 6 normally works like this, reduce exhaust gas temperature, reduce the impact on engine performance.Another advantage of this passage is that it is arranged in below engine cylinder cover 1 water outlet, does not change engine cylinder cover 1 inner water sleeve and arranges, can not have an impact to the cooling system of engine cylinder cover 1.

Claims (5)

1. an engine exhaust-gas recirculating system, it is characterized in that, it comprises cooling water circulation and exhaust gas recirculation mechanism, described cooling water circulation is communicated with car load radiator (11), cooling water circulation regulates the temperature of EGR gas under Engine ECU (8) controls, and described exhaust gas recirculation mechanism is arranged between enmgine exhaust (2) and engine cylinder cover gas inlet passage (12);
Described exhaust gas recirculation mechanism comprises EGR assembly and exhaust gas recirculation circuit, described EGR assembly is made up of EGR valve (6), EGR valve seat (5) and EGR bypass valve (4), described EGR valve (6) outlet end is provided with the temperature transducer (9) be communicated with Engine ECU (8), and its entrance point is communicated with EGR valve seat (5);
Described EGR valve seat (5) is provided with the suction port be communicated with cooler for recycled exhaust gas cycle gas passage and EGR bypass valve (4) respectively, EGR valve seat (5) is also provided with the air outlet be communicated with EGR valve (6), EGR valve seat (5) is also provided with the cooling water channel be communicated with cooling water circulation pipeline (13).
2. a kind of engine exhaust-gas recirculating system according to claim 1, it is characterized in that, the cooling water circulation pipeline (13) that described cooling water circulation comprises cooler for recycled exhaust gas (3), electronic water pump (7) and is communicated with car load radiator (11), described cooler for recycled exhaust gas (3) sticks up the U-shaped cooler of formula for plate, be provided with cooling water passage and cycle gas passage therein, described cooling water passage is communicated with cooling water circulation pipeline (13), and described cycle gas passage is communicated with exhaust gas recirculation mechanism.
3. a kind of engine exhaust-gas recirculating system according to claim 2, it is characterized in that, described electronic water pump (7) is connected in cooling water circulation pipeline (13), above arranges the flow control valve (7-1) controlled by Engine ECU (8) at electronic water pump (7).
4. a kind of engine exhaust-gas recirculating system according to claim 3, is characterized in that, described EGR bypass valve (4) is arranged between enmgine exhaust (2) and EGR valve seat (5), and it and cooler for recycled exhaust gas (3) are parallel-connection structure.
5. a kind of engine exhaust-gas recirculating system according to claim 4, is characterized in that, described engine cylinder cover gas inlet passage (12) is connected with engine intake manifold (10), and it is arranged in the below of outfall sewer in engine cylinder cover.
CN201210419907.2A 2012-10-29 2012-10-29 A kind of engine exhaust-gas recirculating system Active CN102937057B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210419907.2A CN102937057B (en) 2012-10-29 2012-10-29 A kind of engine exhaust-gas recirculating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210419907.2A CN102937057B (en) 2012-10-29 2012-10-29 A kind of engine exhaust-gas recirculating system

Publications (2)

Publication Number Publication Date
CN102937057A CN102937057A (en) 2013-02-20
CN102937057B true CN102937057B (en) 2015-08-05

Family

ID=47695972

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210419907.2A Active CN102937057B (en) 2012-10-29 2012-10-29 A kind of engine exhaust-gas recirculating system

Country Status (1)

Country Link
CN (1) CN102937057B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105781812A (en) * 2016-03-21 2016-07-20 潍柴动力股份有限公司 EGR (exhaust gas recirculation) cooling closed-loop control system and method for cooling EGR gas
KR20200057946A (en) * 2018-11-19 2020-05-27 현대자동차주식회사 Control method of vehicle having exhaust gas recirculation system
CN110792534A (en) * 2019-11-28 2020-02-14 哈尔滨东安汽车动力股份有限公司 Water outlet adapter of integrated EGR valve
CN113464324A (en) * 2021-07-27 2021-10-01 无锡双翼汽车环保科技有限公司 Multichannel EGR cooler
CN113464325A (en) * 2021-08-06 2021-10-01 无锡同益汽车动力技术有限公司 Novel EGR cooler

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201301763Y (en) * 2008-08-13 2009-09-02 奇瑞汽车股份有限公司 Exhaust gas recirculation cooler
CN101889136A (en) * 2007-12-04 2010-11-17 丰田自动车株式会社 Internal combustion engine
CN201747481U (en) * 2010-06-02 2011-02-16 奇瑞汽车股份有限公司 EGR system control device
CN201884147U (en) * 2010-12-15 2011-06-29 东风朝阳柴油机有限责任公司 Underlying exhaust gas recirculation system device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080052061A (en) * 2006-12-07 2008-06-11 현대자동차주식회사 Exhaust gas recirculation control system for vehicle and method thereof
JP2010144600A (en) * 2008-12-18 2010-07-01 Nissan Motor Co Ltd Cooling water flow controlling device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101889136A (en) * 2007-12-04 2010-11-17 丰田自动车株式会社 Internal combustion engine
CN201301763Y (en) * 2008-08-13 2009-09-02 奇瑞汽车股份有限公司 Exhaust gas recirculation cooler
CN201747481U (en) * 2010-06-02 2011-02-16 奇瑞汽车股份有限公司 EGR system control device
CN201884147U (en) * 2010-12-15 2011-06-29 东风朝阳柴油机有限责任公司 Underlying exhaust gas recirculation system device

Also Published As

Publication number Publication date
CN102937057A (en) 2013-02-20

Similar Documents

Publication Publication Date Title
CN203308560U (en) Engine cooling recirculation system, and corresponding engine and automobile
CN103775252B (en) Intelligent cooling device of supercharged diesel engine EGR system
JP5754755B2 (en) Engine arrangement with charge air cooler and EGR system
CN102937057B (en) A kind of engine exhaust-gas recirculating system
US20120297765A1 (en) Cooling arrangement for a chargeable internal combustion engine
CN105201614B (en) Cooling system for internal combustion engine
KR101601088B1 (en) Engine Cooling System
CN108716433A (en) Engine thermal management system and its control method
CN104712465A (en) Engine system having turbo charger
US8967126B2 (en) Exhaust gas recirculation cooler for an internal combustion engine
CN201747481U (en) EGR system control device
CN102374076A (en) High-pressure exhaust-gas recirculation system with heat recovery
CN207989179U (en) Diesel engine exhaust gas recirculation system
CN207989177U (en) Diesel engine exhaust gas recirculation system
CN106150770A (en) A kind of gas recirculation system and automobile
CN107201973A (en) The gas recirculation system and its application method of a kind of gasoline supercharging engine and the automobile engine with it
CN106762241A (en) A kind of engine exhaust-gas recirculating system
WO2010114431A1 (en) Internal combustion engine with an egr cooling system
CN208153202U (en) diesel engine exhaust gas recirculation system
WO2010123411A1 (en) Method and arrangement for recirculation of exhaust gases of a combustion engine
CN208236522U (en) Engine aspirating system and automobile
Krüger et al. High performance cooling and EGR systems as a contribution to meeting future emission standards
CN106609713A (en) A method and a device for reducing NOx in waste gas and an exhaust gas recirculation system
CN107781023B (en) Engine cooling system for vehicle and vehicle
CN109441656A (en) A kind of cylinder head that multiloop is cooling

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant