CN100350144C - Method and device for reducing exhaust of vehicle at cold start - Google Patents
Method and device for reducing exhaust of vehicle at cold start Download PDFInfo
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- CN100350144C CN100350144C CNB2004100357528A CN200410035752A CN100350144C CN 100350144 C CN100350144 C CN 100350144C CN B2004100357528 A CNB2004100357528 A CN B2004100357528A CN 200410035752 A CN200410035752 A CN 200410035752A CN 100350144 C CN100350144 C CN 100350144C
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- solenoid valve
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- cold start
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The present invention relates to a method and a device for reducing vehicle exhaust at cold start. The device mainly comprises a heater, an engine, three-way catalyst, a temperature sensor, a controller and solenoid valves, wherein the heater is communicated with the engine; a connection pipeline open to the atmosphere is provided with the solenoid valve A; the engine is communicated with the three-way catalyst via a connecting pipeline provided with the solenoid valve B; the three-way catalyst is provided with the temperature sensor; the controller is respectively connected with the solenoid valves A, B and the temperature sensor via control leads. During operation, the solenoid valve A is closed and the solenoid valve B is opened via the controller, so the heater works to raise the temperature of a driving cab space and the three-way catalyst; when the three-way catalyst is at 250 to 300 DEG C, the controller sends out an instruction for closing the solenoid valve B and simultaneously opening the solenoid valve A, and starts the engine, so that the three-way catalyst catalytically converts the tail gas by starting vehicles. The present invention has the characteristics of reasonable design, simple structure and favorable effect on reduction of pollution discharge.
Description
(1) technical field
The present invention relates to a kind of reduction vehicle exhaust drainage, particularly a kind of method that reduces the automobile cold start drainage device and reduce blowdown.
(2) background technique
Along with the deterioration of earth environment, the aggravation of greenhouse effect, global various diseases and natural disaster are spread unchecked, and make people to the significance of the environment of preserving our planet understanding higher, that upgrade arranged.With regard to present urban environment, automobile exhaust pollution has become the maximum provider of urban atmospheric pollution.Urban road is narrow, air circulation is poor, make vehicle exhaust arrived must improvement degree.In developed country, begun strict exhaust emission standard and rules for a long time, and implemented corresponding control measures.New emission standard has also been implemented in China Beijing from January 1st, 1999, the standard in Europe that is equivalent to 90 years 20th century, the keypoint treatment car, require the car after nineteen ninety-five also all must reach new standard simultaneously, other big city such as Shanghai, Guangzhou, Xi'an have also proposed corresponding countermeasures and local regulation subsequently, to improve atmosphere environment.The control vehicle exhaust is comprehensive, a systemic engineering, can not only depend on passive improvement, back to administer, and to improve from energy development, engine technology, applying etc. of power-saving technology start with, so thoroughly solution tail gas is to the pollution problem of environment.Certainly, be the Hyundai Motor industry of main fuel with gasoline, diesel oil, rock gas, present stage adopts the method for reprocessing to resolve the emission problem of tail gas mostly.At present, the measure and the method for control exhaust emissions are a lot, and the method that three-way catalytic apparatus for example is installed on outlet pipe is one of efficient and simple method, also are using one of indispensable annex of limousine at present.But this method also exists certain drawback, and heater needs electric heating, causes energy waste; Automobile exhaust heat is not fully utilized.
The harmful substances that mainly contains in the vehicle exhaust has: harmful gases such as carbon monoxide, hydrocarbon, nitrogen oxide, particulate matter and sulphide and a spot of aldehydes, benzene class.
The series of chemical of these vehicle exhausts mainly is oxidation reaction and reduction reaction.Carbon monoxide is oxidized object, also can make reducing agent simultaneously; Oxygen is main oxygenant; Hydrogen is reducing agent, also is oxygenant simultaneously; Nitrogen oxide is the object that is reduced; Hydrocarbon is oxidized object, also can make reducing agent simultaneously.
The amount of these key reaction things can be improved the means of the air fuel ratio of control motor and finish, as the employing of automatically controlled air fuel ratio and EFI Carburetor by improving the performance of motor.But, outside the Pass above-mentioned reaction removes and amount separately has, also relevant with temperature.Oxidation reaction is exothermic reaction, if reduce temperature gradually, help it and react, and reduction reaction is heat absorption reaction, increases the carrying out that temperature helps reduction reaction, so above-mentioned reaction also should be controlled temperature.The factor of influence reaction is a lot, being subject to most artificial control and playing a factor of the most easily ignoring in numerous factors is the operating temperature of ternary catalyzing unit, and the conversion ratio of catalyst converter and temperature have confidential relation, only reaches uniform temperature when above, catalyst converter could be worked, and is also referred to as ignition.The temperature variant curve of transformation efficiency is called the initiation temperature characteristic curve of catalyst converter, and as shown in Figure 3, the temperature when reaching 50% conversion ratio is called initiation temperature T 50.The optimum working temperature of catalyst converter is between 250 ℃～300 ℃ as seen from the figure, and still in the winter time, the operating temperature during vehicle starting far can not meet the requirements of more than 250 ℃, and this just makes that ternary catalyzing unit is lack scope for their abilities.And particularly because cold-start phase each several part temperature is lower, and fuel-oil atmozation is bad, and it is insufficient to burn, for smooth combustion often provides due to the denseer mixed gas to cylinder.Therefore controlling the temperature of starting period well to reduce the automobile cold start blowdown, is crucial for the vehicle that installs ternary catalyzing unit additional.
(3) summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of reasonable in design, simple in structure, reduce the good reduction automobile cold start drainage device of filth-discharging effect and reduce the method for blowdown.
A kind of method that reduces the automobile cold start drainage device and reduce blowdown, device comprises heater, motor, ternary catalyzing unit, temperature transducer, controller, solenoid valve, pilot, connecting tube, heater is communicated with motor and atmosphere respectively by connecting tube, the connecting tube that is communicated with atmosphere is provided with solenoid valve A, the connecting tube that is communicated with motor is provided with solenoid valve B, and the connecting tube that is provided with solenoid valve B is communicated with ternary catalyzing unit simultaneously; Ternary catalyzing unit is provided with temperature transducer; Controller is connected with temperature transducer with solenoid valve A, solenoid valve B respectively by pilot.
Described controller is made up of normal voltage signal generator, signal processor, signal amplifier, signal comparator and final controlling element, and the normal voltage signal generator is connected with signal comparator with automobile storage battery respectively; Signal reason processor is connected with temperature transducer and signal amplifier on the ternary catalyzing unit respectively; Signal amplifier is connected with signal comparator; Signal comparator is connected with final controlling element; Final controlling element is connected with solenoid valve; Above-mentioned connection all is to be electrically connected.
Described normal voltage signal generator comprises resistance R, capacitor C 1, C2, C3, diode D1 and voltage-stabiliser tube DW, is electrically connected between each element; Resistance R is connected with storage battery, and voltage-stabiliser tube DW is connected with signal comparator.
The bleeder circuit that described signal processor is made up of resistance R 1, R2 and variable resistor VR, resistance R 2 one ends are connected with temperature transducer, and the other end is connected with 3 pin of intergrated circuit LM393 in the signal amplifier.
Described signal amplifier mainly comprises intergrated circuit LM393, and 1 pin of intergrated circuit LM393 is connected with 5 pin of intergrated circuit LM393 in the signal comparator.
Described signal comparator is made up of intergrated circuit LM393, and 7 pin of intergrated circuit LM393 are connected with the base stage of triode S8058 in the final controlling element.
Described final controlling element comprises triode S8058 and relay, and relay is connected with solenoid valve A, B with the collector electrode of triode S8058 respectively.
Utilizing the present invention to reduce the automobile cold start drainage device, to reduce the method for blowdown as follows:
1, before the engine start, closes solenoid valve A, open solenoid valve B, heater work, temperature, engine body temperature, cooling water temperature, oil temperature and the three-element catalytic actuator temperature of raising cab space by controller;
2, heater work is 2～3 minutes, when ternary catalyzing unit reaches 250 ℃～300 ℃, sends signal by temperature transducer and gives controller, and controller sends closes the solenoid valve B instruction of opens solenoid valve A simultaneously, and pilots engine.
3, engine operation, ternary catalyzing unit carries out catalyzed conversion to automobile engine tail gas.
During work, the collection of signal reason processor is from the temperature signal of temperature transducer, temperature signal in the ternary catalyzing unit is converted into voltage signal, this voltage signal amplifies the back and compares with the standard operation temperature voltage that the normal voltage signal generator produces, thereby judges whether ternary catalyzing unit reaches normal operating temperature, whether can carry out the unlatching of valve switch.
Because during engine operation, ternary catalyzing unit is to work under optimum temperature, can carry out effective catalyzed conversion to the tail gas of motor car engine, thus a large amount of blowdowns when reducing automobile cold start.
That the present invention has is reasonable in design, simple in structure, the characteristics of a large amount of blowdowns when effectively reducing automobile cold start.Through verification experimental verification, the conversion ratio of hydrocarbon, oxynitrides, carbon monoxide is respectively by originally not using 3%, 7% and 12% when of the present invention to bring up to 87%, 91% and 96%.Discharge of harmful gases amount when greatly reducing automobile cold start.
(4) description of drawings
Fig. 1 is the block diagram that the present invention reduces the automobile cold start drainage device.
Fig. 2 is the electrical schematic diagram that the present invention reduces automobile cold start drainage device middle controller.
Fig. 3 is the initiation temperature characteristic curve of catalyst converter.
Wherein, 1, heater, 2, motor, 3, ternary catalyzing unit, 4, temperature transducer, 5, controller, 6, solenoid valve A, 7, solenoid valve B, 8, pilot, 9, connecting tube.
(5) embodiment
Embodiment 1: structure of the present invention as depicted in figs. 1 and 2, form by heater 1, motor 2, ternary catalyzing unit 3, temperature transducer 4, controller 5, solenoid valve 6,7, pilot 8, connecting tube 9, heater 1 is communicated with motor 2 and atmosphere respectively by connecting tube 9, the connecting tube 9 that is communicated with atmosphere is provided with solenoid valve A, the connecting tube 9 that is communicated with motor 2 is provided with solenoid valve B, and the connecting tube 9 that is provided with solenoid valve B is communicated with ternary catalyzing unit 3 simultaneously; Ternary catalyzing unit 3 is provided with temperature transducer 4; Controller 5 is connected with temperature transducer 4 with solenoid valve A, solenoid valve B respectively by pilot 8.
Described controller is made up of normal voltage signal generator, signal reason processor, signal amplifier, signal comparator and final controlling element, and the normal voltage signal generator is connected with signal comparator with automobile storage battery respectively; Signal reason processor is connected with temperature transducer and signal amplifier on the ternary catalyzing unit respectively; Signal amplifier is connected with signal comparator; Signal comparator is connected with final controlling element; Final controlling element is connected with solenoid valve; Above-mentioned connection all is to be electrically connected.
Described final controlling element is made up of triode S8058 and relay, and relay is connected with solenoid valve A, B with the collector electrode of triode S8058 respectively.
The method that said apparatus reduces blowdown is as follows:
1, before motor 2 starts, closes solenoid valve A, open solenoid valve B, heater 1 work, temperature, engine body temperature, cooling water temperature, oil temperature and the three-element catalytic actuator temperature of raising cab space by controller;
2, heater 1 work is 2 minutes, and ternary catalyzing unit reaches 250 ℃, sends signal by temperature transducer and gives controller 5, and controller 5 sends closes the solenoid valve B instruction of opens solenoid valve A simultaneously, and pilots engine 2.
3, motor 2 work, 3 pairs of car engine tail gas of ternary catalyzing unit carry out catalyzed conversion.
Embodiment 2: structure is with embodiment 1.
The method that said apparatus reduces blowdown is as follows:
1, before motor 2 starts, closes solenoid valve A, open solenoid valve B, heater 1 work, temperature, engine body temperature, cooling water temperature, oil temperature and the three-element catalytic actuator temperature of raising cab space by controller;
2, heater 1 work is 2 minutes 30 seconds, and ternary catalyzing unit reaches 280 ℃, sends signal by temperature transducer and gives controller 5, and controller 5 sends closes the solenoid valve B instruction of opens solenoid valve A simultaneously, and pilots engine 2.
3, motor 2 work, 3 pairs of car engine tail gas of ternary catalyzing unit carry out catalyzed conversion.
Embodiment 3: structure is with embodiment 1.
The method that said apparatus reduces blowdown is as follows:
1, before motor 2 starts, closes solenoid valve A, open solenoid valve B, heater 1 work, temperature, engine body temperature, cooling water temperature, oil temperature and the three-element catalytic actuator temperature of raising cab space by controller;
2, heater 1 work is 3 minutes, and ternary catalyzing unit reaches 300 ℃, sends signal by temperature transducer and gives controller 5, and controller 5 sends closes the solenoid valve B instruction of opens solenoid valve A simultaneously, and pilots engine 2.
3, motor 2 work, 3 pairs of car engine tail gas of ternary catalyzing unit carry out catalyzed conversion.
Through verification experimental verification, in the above-described embodiments, the conversion ratio of hydrocarbon, oxynitrides, carbon monoxide is respectively by originally not using 3%, 7%, 12% of native system to bring up to 87%, 91%, 96%.Discharge of harmful gases amount when greatly reducing automobile cold start.
Claims (8)
1, a kind of reduction automobile cold start drainage device, it is characterized in that, reduce the automobile cold start drainage device and comprise heater, motor, ternary catalyzing unit, temperature transducer, controller, solenoid valve, pilot, connecting tube, heater is communicated with motor and atmosphere respectively by connecting tube, the connecting tube that is communicated with atmosphere is provided with solenoid valve A, the connecting tube that is communicated with motor is provided with solenoid valve B, the connecting tube that is provided with solenoid valve B is communicated with ternary catalyzing unit simultaneously, and ternary catalyzing unit is provided with temperature transducer; Controller is connected with temperature transducer with solenoid valve A, solenoid valve B respectively by pilot; Before engine start, close solenoid valve A, open solenoid valve B and ternary catalyzing unit is heated to operating temperature with heater.
2, a kind of reduction automobile cold start drainage device as claimed in claim 1, it is characterized in that, described controller is made up of normal voltage signal generator, signal processor, signal amplifier, signal comparator and final controlling element, and the normal voltage signal generator is connected with signal comparator with automobile storage battery respectively; Signal processor is connected with temperature transducer and signal amplifier on the ternary catalyzing unit respectively; Signal amplifier is connected with signal comparator; Signal comparator is connected with final controlling element; Final controlling element is connected with solenoid valve; Above-mentioned connection all is to be electrically connected.
3, a kind of reduction automobile cold start drainage device as claimed in claim 2 is characterized in that described normal voltage signal generator comprises resistance R, capacitor C 1, C2, C3, diode D1 and voltage-stabiliser tube DW, is electrically connected between each element; Resistance R is connected with storage battery, and voltage-stabiliser tube DW is connected with signal comparator.
4, a kind of reduction automobile cold start drainage device as claimed in claim 2, it is characterized in that, the bleeder circuit that described signal processor is made up of resistance R 1, R2 and variable resistor VR, resistance R 2 one ends are connected with temperature transducer, and the other end is connected with 3 pin of intergrated circuit LM393 in the signal amplifier.
5, a kind of reduction automobile cold start drainage device as claimed in claim 2 is characterized in that described signal amplifier mainly comprises intergrated circuit LM393, and 1 pin of intergrated circuit LM393 is connected with 5 pin of intergrated circuit LM393 in the signal comparator.
6, a kind of reduction automobile cold start drainage device as claimed in claim 2 is characterized in that described signal comparator is made up of intergrated circuit LM393, and 7 pin of intergrated circuit LM393 are connected with the base stage of triode S8058 in the final controlling element.
7, a kind of reduction automobile cold start drainage device as claimed in claim 2 is characterized in that described final controlling element comprises triode S8058 and relay, and relay is connected with solenoid valve A, B with the collector electrode of triode S8058 respectively.
8, a kind of method that the automobile cold start drainage device reduces blowdown that reduces as claimed in claim 1 is characterized in that method is as follows:
(1) before the engine start, closes solenoid valve A, open solenoid valve B, heater work, temperature, engine body temperature, cooling water temperature, oil temperature and the three-element catalytic actuator temperature of raising cab space by controller;
(2) heater work is 2～3 minutes, when ternary catalyzing unit reaches 250 ℃～300 ℃, has temperature transducer to send signal and gives controller, and controller sends closes the solenoid valve B instruction of opens solenoid valve A simultaneously, and pilots engine;
(3) engine operation, ternary catalyzing unit carries out catalyzed conversion to automobile engine tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100357528A CN100350144C (en) | 2004-09-21 | 2004-09-21 | Method and device for reducing exhaust of vehicle at cold start |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100357528A CN100350144C (en) | 2004-09-21 | 2004-09-21 | Method and device for reducing exhaust of vehicle at cold start |
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| CN1614217A CN1614217A (en) | 2005-05-11 |
| CN100350144C true CN100350144C (en) | 2007-11-21 |
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| CNB2004100357528A Expired - Fee Related CN100350144C (en) | 2004-09-21 | 2004-09-21 | Method and device for reducing exhaust of vehicle at cold start |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833052A (en) * | 2010-04-23 | 2010-09-15 | 北京锐意泰克汽车电子有限公司 | Fault diagnosis circuit of automotive oxygen sensor heater |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210507B (en) * | 2006-12-29 | 2010-12-22 | 奇瑞汽车股份有限公司 | Method and system for modifying HC discharge of engine when starting |
| US7873464B2 (en) * | 2009-04-01 | 2011-01-18 | Gm Global Technology Operations, Inc. | Block heater usage detection and coolant temperature adjustment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074821U (en) * | 1990-09-17 | 1991-04-10 | 梁金华 | Quick pre-heating device for automobile engine |
| WO1994024424A1 (en) * | 1993-04-16 | 1994-10-27 | Engelhard Corporation | Method and apparatus for reduction of pollutants emitted from automotive engines by flame incineration |
| EP0718477A1 (en) * | 1994-12-19 | 1996-06-26 | Petroleum Energy Center | Heating system for catalytic converter |
| WO1998050686A1 (en) * | 1997-05-09 | 1998-11-12 | Parise Ronald J | Thermoelectric catalytic power generator with preheat |
-
2004
- 2004-09-21 CN CNB2004100357528A patent/CN100350144C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074821U (en) * | 1990-09-17 | 1991-04-10 | 梁金华 | Quick pre-heating device for automobile engine |
| WO1994024424A1 (en) * | 1993-04-16 | 1994-10-27 | Engelhard Corporation | Method and apparatus for reduction of pollutants emitted from automotive engines by flame incineration |
| EP0718477A1 (en) * | 1994-12-19 | 1996-06-26 | Petroleum Energy Center | Heating system for catalytic converter |
| WO1998050686A1 (en) * | 1997-05-09 | 1998-11-12 | Parise Ronald J | Thermoelectric catalytic power generator with preheat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833052A (en) * | 2010-04-23 | 2010-09-15 | 北京锐意泰克汽车电子有限公司 | Fault diagnosis circuit of automotive oxygen sensor heater |
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| CN1614217A (en) | 2005-05-11 |
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Assignee: Wuxi Longsheng Technology Co., Ltd. Assignor: Shandong University Contract fulfillment period: 2009.3.1 to 2014.2.28 contract change Contract record no.: 2009320000230 Denomination of invention: Method and device for reducing exhaust of vehicle at cold start Granted publication date: 20071121 License type: Exclusive license Record date: 2009.3.5 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.1 TO 2014.2.28; CHANGE OF CONTRACT Name of requester: WUXI LONGSHEN TECHNOLOGY CO., LTD. Effective date: 20090305 |
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Assignee: Wuxi Longsheng Technology Co., Ltd. Assignor: Shandong University Contract record no.: 2009320000230 Date of cancellation: 20120607 |
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