CN201818369U - Diesel engine for heavy-duty car - Google Patents

Diesel engine for heavy-duty car Download PDF

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Publication number
CN201818369U
CN201818369U CN2010205753404U CN201020575340U CN201818369U CN 201818369 U CN201818369 U CN 201818369U CN 2010205753404 U CN2010205753404 U CN 2010205753404U CN 201020575340 U CN201020575340 U CN 201020575340U CN 201818369 U CN201818369 U CN 201818369U
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China
Prior art keywords
urea
control unit
spray system
diesel engine
obd
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Expired - Lifetime
Application number
CN2010205753404U
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Chinese (zh)
Inventor
钟力民
李红珍
陈利仙
陈金军
孙霞
范辉
王涛
金增兵
蒲雨新
盖永田
赵黎斌
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.)
China National Heavy Duty Truck Group Jinan Power Co Ltd
China National Heavy Duty Truck Group Taian Wuyue Special Vehicle Co Ltd
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China National Heavy Duty Truck Group Jinan Power Co Ltd
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Publication date
Application filed by China National Heavy Duty Truck Group Jinan Power Co Ltd filed Critical China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority to CN2010205753404U priority Critical patent/CN201818369U/en
Application granted granted Critical
Publication of CN201818369U publication Critical patent/CN201818369U/en
Anticipated expiration legal-status Critical
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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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y02T10/12—Improving ICE efficiencies

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  • Exhaust Gas After Treatment (AREA)

Abstract

The utility model relates to a diesel engine for a heavy-duty car, which is low in cost and wide in application scope, meets the emission limit requirement of the IV stage of GB 17691 emission regulation and the HJ 437 requirement of the regulation, and realizes the requirement of real-time monitoring of an on-board diagnostics (OBD) system. The structure is that the diesel engine for the heavy-duty car comprises an electronic control common rail fuel injection system, an exhaust after treatment system and the OBD system, wherein the electronic control common rail fuel injection system and the exhaust after treatment system are respectively arranged inside and outside the engine; the OBD system comprises a urea injection system control unit (DCU), an electronic control unit (ECU) and various sensors; and the ECU and the urea injection system DCU are respectively connected with the electronic control common rail fuel injection system and the exhaust after treatment system by the corresponding sensors.

Description

A kind of heavy-duty car diesel engine
Technical field
The utility model relates to the technical field of diesel engine, particularly a kind of heavy-duty car diesel engine that satisfies state's IV emission standard that adopts catalytic reduction reaction SCR technology path.
Background technique
At present, national regulation, the motor of new production must satisfy the forced discharge standard of State Standard of the People's Republic of China GB 17691 " automobile-used compression-ignited, gaseous fuel spark-ignition engine and automobile exhaust pollutant discharge limit value and method of measurement (Chinese III, IV, V stage) " stage by stage.
Wherein satisfy the technology path of the heavy diesel engine for automobile of IV stage emission limit, generally there are two kinds, a kind of is to adopt electric control fuel oil jet system at the emission controls by improving combustion particulate matter, and machine adopts the SCR(catalytic reduction reaction outward) technology purifies the NOx(nitrogen oxide) technology path; Another kind be adopt electric control fuel oil jet system and with adopting the EGR(exhaust gas recirculation in opportunity) technology purifies NOx, machine adopts the DPF(diesel particulate filter outward) or DOC(oxidative diesel reactor) and the PMC(grain catcher) etc. the technology path of technology particulate matter.
Adopt the heavy diesel engine for automobile of first kind of technology path, machine adopts the implementation of SCR that multiple mode is arranged at present outward, as takes pressurized air as the mode of spraying power source, will be ejected in the outlet pipe after urea liquid and the pressurized air mixing; Or take the spray regime of automatically controlled nozzle, and utilize urea pump to produce the urea liquid of certain pressure, by the open and close of control urea nozzle, realize accurate urea-spray metering.
Adopt the heavy diesel engine for automobile of first kind of technology path, the purification of machine endoparticle thing is mainly by the control to the machine internal combustion, with the particulate matter reduction of burning; The NO that produces X, effulent such as HC handles by the SCR after-treatment system.
In addition; satisfy the diesel engine of state's IV stage emission standard; also must have the On-Board Diagnostics (OBD) OBD system that meets the national environmental protection ministerial standard HJ437-2008 of the People's Republic of China (PRC) " automobile-used compression-ignited, gaseous fuel spark-ignition engine and automobile mounted diagnosis (OBD) systems technology require " simultaneously, the running state of the system that monitoring in real time is relevant with diesel emission.
But cost is than higher on the present diesel engine structural design, the quality and the Environmental Conditions of diesel oil required also than higher, thereby limited using scope.
Summary of the invention
For solving above technical deficiency, the utility model provides a kind of cost low, using scope is wide, can satisfy the heavy-duty car diesel engine that IV stage emission limit requirement of GB17691 Abgasgesetz and rules HJ437 required and can realize the real-time monitoring requirement of On-Board Diagnostics (OBD) OBD system.
The utility model is realized by following measure:
A kind of heavy-duty car diesel engine comprises electric-controlled co-rail fuel injection system, exhaust after treatment system and On-Board Diagnostics (OBD) OBD system; Electric-controlled co-rail fuel injection system and exhaust after treatment system be separately positioned in the motor and motor outside, On-Board Diagnostics (OBD) OBD system comprises urea-spray system control unit DCU, electronic control unit ECU and various kinds of sensors, and electronic control unit ECU is connected with exhaust after treatment system with the electric-controlled co-rail fuel injection system by corresponding sensor respectively with urea-spray system control unit DCU.
Described electric-controlled co-rail fuel injection system is arranged in in-engine fuel feeding and the combustion system, comprise oil feed pump, be total to rail assembly, oil sprayer, electronic control unit ECU, oil feed pump is by pipeline rail assembly connection together, rail assembly is connected with oil sprayer altogether, be respectively equipped with common rail sensor on oil feed pump, the common rail assembly, each common rail sensor all is connected with electronic control unit ECU.
Described electronic control unit ECU also is connected with atmosphere temperature transducer with the barometric pressure sensor of monitoring atmospheric conditions.
Described exhaust after treatment system is arranged on outside the motor, comprises urea-spray system, catalytic reduction reactor and urea-spray system control unit DCU; Wherein, catalytic reduction reactor is encapsulated in the silencing apparatus; The urea-spray system is connected with urea-spray system control unit DCU.
Described urea-spray system comprises urea box, urea pump, urea nozzle, urea pipe, cooling liquid one-way valve, control wire harness, and urea box is connected with urea pump by the urea pipe, and urea pump is connected with urea nozzle; Urea nozzle is connected with urea-spray system control unit DCU; Be provided with the urea heater in the urea box, the urea heater is connected with coolant pipe, is provided with the cooling liquid one-way valve on coolant pipe; Coolant pipe is connected with engine water outlet; Urea box is provided with urea level sensor and the urea temperature transducer that is connected with urea-spray system control unit DCU, urea pump is provided with the urea pressure transducer that is connected with urea-spray system control unit DCU, the catalytic reduction reactor front end is provided with temperature transducer before the carrier, and the rear end is provided with temperature transducer and nitrogen oxide NO behind the carrier XSensor, temperature transducer and nitrogen oxide NO behind the preceding temperature transducer of carrier, the carrier XSensor all is connected with urea-spray system control unit DCU.
The beneficial effects of the utility model are: the various emission control principles of following present main flow, in conjunction with diesel engine reality, the emission control system of diesel engine can satisfy fully rules to the IV stage limit value that discharges pollutants require, On-Board Diagnostics (OBD) OBD system monitoring requires and other discharging life requirements etc., simultaneously, structural concrete setting has more cost advantage, reduced requirement to Environmental Conditions, using scope is more extensive, more can satisfy the domestic usage requirement of China to diesel engine, reduce fuel consume simultaneously, had the effect of energy-saving and emission-reduction.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of exhaust after treatment system of the present utility model.
Among the figure: 1. electric-controlled co-rail fuel injection system, 2. exhaust after treatment system, 3. urea-spray system, 4. catalytic reduction reactor, 5. urea-spray system control unit DCU, 6. be total to the rail sensor, 7. oil feed pump 8. is total to rail assembly, 9. oil sprayer, 10. electronic control unit ECU, 11. urea box, 12. urea pumps, 13. urea nozzle, 14. urea level sensor, 15. the urea temperature transducer, temperature transducer before the 16. urea pressure transducers, 17. carriers, 18. temperature transducer behind the carrier, 19. nitrogen oxide NO XSensor, 20. urea pipes, 21. urea heaters, 22. coolant pipes, 23. cooling liquid one-way valves, 24. barometric pressure sensor, 25 atmosphere temperature transducers.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Among Fig. 1, Fig. 2, comprise electric-controlled co-rail fuel injection system 1, exhaust after treatment system 2 and On-Board Diagnostics (OBD) OBD system; Electric-controlled co-rail fuel injection system 1 and exhaust after treatment system 2 be separately positioned in the motor and motor outside, On-Board Diagnostics (OBD) OBD system comprises urea-spray system control unit DCU5 and electronic control unit ECU10 and various kinds of sensors, and electronic control unit ECU10 is connected with exhaust after treatment system 2 with electric-controlled co-rail fuel injection system 1 by corresponding sensor respectively with urea-spray system control unit DCU5.
Described electric-controlled co-rail fuel injection system 1 is arranged in in-engine fuel feeding and the combustion system, comprise oil feed pump 7, be total to rail assembly 8, oil sprayer 9, electronic control unit ECU10, oil feed pump 7 is by pipeline rail assembly 8 connections together, rail assembly 8 is connected with oil sprayer 9 altogether, be respectively equipped with common rail sensor 6 on oil feed pump 7, the common rail assembly 8, each common rail sensor 6 all is connected with electronic control unit ECU10.
Described electronic control unit ECU10 also is connected with atmosphere temperature transducer 25 with the barometric pressure sensor 24 of monitoring atmospheric conditions.
Described exhaust after treatment system 2 is arranged on outside the motor, comprises urea-spray system 3, catalytic reduction reactor 4 and urea-spray system control unit DCU5; Wherein, catalytic reduction reactor 4 is encapsulated in the silencing apparatus; Urea-spray system 3 is connected with urea-spray system control unit DCU5.
Described urea-spray system 3 comprises urea box 11, urea pump 12, urea nozzle 13, urea pipe 20, cooling liquid one-way valve 23, control wire harness, and urea box 11 is connected with urea pump 12 by urea pipe 20, and urea pump 12 is connected with urea nozzle 13; Urea nozzle 13 is connected with urea-spray system control unit DCU5; Be provided with urea heater 21 in the urea box 11, urea heater 21 is connected with coolant pipe 22, is provided with cooling liquid one-way valve 23 on coolant pipe 22; Coolant pipe 22 is connected with engine water outlet; Urea box 11 is provided with urea level sensor 14 and the urea temperature transducer 15 that is connected with urea-spray system control unit DCU5, urea pump 12 is provided with the urea pressure transducer 16 that is connected with urea-spray system control unit DCU5, catalytic reduction reactor 4 front ends are provided with temperature transducer 17 before the carrier, and the rear end is provided with temperature transducer 18 and nitrogen oxide NO behind the carrier XSensor 19, temperature transducer 18 and nitrogen oxide NO behind the preceding temperature transducer 17 of carrier, the carrier XSensor 19 all is connected with urea-spray system control unit DCU5.
Diesel engine of the present utility model is in the same place the organic design of electric-controlled co-rail fuel injection system 1, exhaust after treatment system 2 and On-Board Diagnostics (OBD) OBD system, satisfies emission limit requirement of Abgasgesetz IV stage and the requirement of On-Board Diagnostics (OBD) OBD system monitoring.Electric-controlled co-rail fuel injection system 1 is with combustion system, and the burning in the control cylinder by control injection time and injection pressure, makes fuel oil and air fully mix after-combustion, accomplishes the optimization of machine endoparticle thing discharging, reduces fuel consume simultaneously.
The diesel engine of the utility model design has adopted the exhaust after treatment system 2 of catalytic reduction reaction SCR system, utilizes the nitrogen oxide NO in the engine exhaust XAfter liquid area that the institute accurate measurement is sprayed mixes, carry out reduction reaction on the carrier of reducing agent scribbling, with nitrogen oxide NO XResolve into N 2And H 2The principle of O, the nitrogen oxide NO in the tail gas the most at last XDischarging is reduced to the level of laws and regulations requirement.Adopt the after-treatment system of this mode low,, therefore, be difficult for producing the problems such as obstruction that cause because of fuel qualities is bad even have the advantages that the high fuel oil of use sulphur content can be not blocked yet to the sulphur sensitization sensitivity in the fuel oil.
The urea box 11 of exhaust after treatment system 2 and urea pipe 20 are provided with the automatically controlled urea system of thawing.When ambient temperature is crossed when low, cooling liquid one-way valve 23 is opened, Diesel Engine Coolants enters urea heater 21 in the urea box 11 via coolant pipe 22, the heat energy that urea heater 21 utilizes Diesel Engine Coolants heat to provide thaws urea, and the electric heating that simultaneity factor starts on the urea pipe 20 is thawed series to guarantee urea liquid proper flow in the pipeline.
The sensor of On-Board Diagnostics (OBD) OBD system comprises each the common rail sensor 6 that is used to monitor the common rail system operation; Barometric pressure sensor 24 and atmosphere temperature transducer 25 in order to the monitoring atmospheric conditions; Urea temperature transducer 15, urea pressure transducer 16 and urea level sensor 14 in order to monitoring urea supply state; In order to temperature transducer 18 and nitrogen oxide NO behind temperature transducer 17, the carrier before the carrier of the operation of monitoring catalytic reduction reaction SCR exhaust after treatment system XSensor 19.Urea temperature transducer 15 and urea level sensor 16 and urea heater 21 are integrated and be arranged in the urea box 11, before temperature transducer 17 is arranged on catalytic reduction reactor 4 before the carrier, and temperature transducer 18 and nitrogen oxide NO behind the carrier XAfter sensor 19 is arranged on catalytic reduction reactor 4.
Utilize above-mentioned various sensor, various diesel engine service datas are gathered in real time and sensor signal is sent to urea-spray control unit DCU5 and electronic control unit ECU10 respectively, have signal to connect between urea-spray control unit DCU5 and the electronic control unit ECU10.Urea-spray control unit DCU5 receives the sensor signal of urea-spray components of system as directed and the signal that electronic control unit ECU10 provides, judge whether to open the urea system of thawing, and compare with within it nominal data of storage, accurately control the emitted dose of urea, judge simultaneously whether discharging exceeds the limit value of emission regulation demands, sends control signal; Electronic control unit ECU10 receives the signal of common rail system sensor and carries out the control signal that urea-spray control unit DCU5 provides, and satisfies the requirement of the real-time monitoring of On-Board Diagnostics (OBD) OBD.

Claims (5)

1. a heavy-duty car diesel engine is characterized in that: comprise electric-controlled co-rail fuel injection system (1), exhaust after treatment system (2) and On-Board Diagnostics (OBD) OBD system; Electric-controlled co-rail fuel injection system (1) and exhaust after treatment system (2) be separately positioned in the motor and motor outside, On-Board Diagnostics (OBD) OBD system comprises urea-spray system control unit DCU(5) and electronic control unit ECU(10) and various kinds of sensors, electronic control unit ECU(10) with urea-spray system control unit DCU(5) be connected with exhaust after treatment system (2) with electric-controlled co-rail fuel injection system (1) by corresponding sensor respectively.
2. heavy-duty car diesel engine as claimed in claim 1, it is characterized in that: described electric-controlled co-rail fuel injection system (1) is arranged in in-engine fuel feeding and the combustion system, comprise oil feed pump (7), be total to rail assembly (8), oil sprayer (9), electronic control unit ECU(10), oil feed pump (7) is by pipeline rail assembly (8) connection together, rail assembly (8) is connected with oil sprayer (9) altogether, oil feed pump (7), altogether be respectively equipped with common rail sensor (6) on the rail assembly (8), each common rail sensor (6) all with electronic control unit ECU(10) be connected.
3. heavy-duty car diesel engine as claimed in claim 2 is characterized in that: described electronic control unit ECU(10) also be connected with atmosphere temperature transducer (25) with the barometric pressure sensor (24) of monitoring atmospheric conditions.
4. heavy-duty car diesel engine as claimed in claim 1, it is characterized in that: described exhaust after treatment system (2) is arranged on outside the motor, comprises urea-spray system (3), catalytic reduction reactor (4) and urea-spray system control unit DCU(5); Wherein, catalytic reduction reactor (4) is encapsulated in the silencing apparatus; Urea-spray system (3) and urea-spray system control unit DCU(5) be connected.
5. heavy-duty car diesel engine as claimed in claim 4, it is characterized in that: described urea-spray system (3) comprises urea box (11), urea pump (12), urea nozzle (13), urea pipe (20), cooling liquid one-way valve (23), control wire harness, urea box (11) is connected with urea pump (12) by urea pipe (20), and urea pump (12) is connected with urea nozzle (13); Urea nozzle (13) and urea-spray system control unit DCU(5) be connected; Be provided with urea heater (21) in the urea box (11), urea heater (21) is connected with coolant pipe (22), is provided with cooling liquid one-way valve (23) on coolant pipe (22); Coolant pipe (22) is connected with engine water outlet; Urea box (11) is provided with and urea-spray system control unit DCU(5) the urea level sensor (14) and the urea temperature transducer (15) that are connected, urea pump (12) is provided with and urea-spray system control unit DCU(5) the urea pressure transducer (16) that is connected, catalytic reduction reactor (4) front end is provided with temperature transducer (17) before the carrier, and the rear end is provided with temperature transducer (18) and nitrogen oxide NO behind the carrier XSensor (19), temperature transducer (18) and nitrogen oxide NO behind the preceding temperature transducer (17) of carrier, the carrier XSensor (19) all with urea-spray system control unit DCU(5) be connected.
CN2010205753404U 2010-10-26 2010-10-26 Diesel engine for heavy-duty car Expired - Lifetime CN201818369U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205753404U CN201818369U (en) 2010-10-26 2010-10-26 Diesel engine for heavy-duty car

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Application Number Priority Date Filing Date Title
CN2010205753404U CN201818369U (en) 2010-10-26 2010-10-26 Diesel engine for heavy-duty car

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CN201818369U true CN201818369U (en) 2011-05-04

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104050867A (en) * 2014-06-27 2014-09-17 襄阳金和环保科技有限公司 Cummins engine teaching device
CN109372616A (en) * 2018-12-25 2019-02-22 长安大学 A kind of diesel SCR emission reduction detecting and controlling system and control method
CN110714819A (en) * 2019-10-31 2020-01-21 中自环保科技股份有限公司 SCR (Selective catalytic reduction) purification system for ship engine tail gas

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104050867A (en) * 2014-06-27 2014-09-17 襄阳金和环保科技有限公司 Cummins engine teaching device
CN104050867B (en) * 2014-06-27 2017-02-08 襄阳金和环保科技有限公司 Cummins engine teaching device
CN109372616A (en) * 2018-12-25 2019-02-22 长安大学 A kind of diesel SCR emission reduction detecting and controlling system and control method
CN109372616B (en) * 2018-12-25 2024-04-05 长安大学 Diesel engine SCR emission reduction detection control system and control method
CN110714819A (en) * 2019-10-31 2020-01-21 中自环保科技股份有限公司 SCR (Selective catalytic reduction) purification system for ship engine tail gas

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Granted publication date: 20110504