CN101749135A - Vehicle exhaust emission control technology - Google Patents
Vehicle exhaust emission control technology Download PDFInfo
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- CN101749135A CN101749135A CN200810136562A CN200810136562A CN101749135A CN 101749135 A CN101749135 A CN 101749135A CN 200810136562 A CN200810136562 A CN 200810136562A CN 200810136562 A CN200810136562 A CN 200810136562A CN 101749135 A CN101749135 A CN 101749135A
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Abstract
The invention belongs to an emission control technology of vehicle exhaust, in particular to a vehicle exhaust emission control technology. By a cooling liquid temperature sensor, an air intake temperature sensor, an air intake pressure sensor and an oxygen sensor which are mounted on a vehicle, a vehicle engine working signal and an exhaust emission signal are collected and transmitted to an engine control module (ECU) which adjusts an optimal ignition time and an optimal oil injection time in real time according to set technical parameters so as to reach the lowest exhaust emission amount. The exhaust burnt by the vehicle engine is guided into a triple catalyst converter for further converting hydrocarbons and carbon monoxide into water vapor and carbon dioxide by an oxidation reaction, and nitrogen oxide is restored into nitrogen gas which is emitted out of the engine. The invention has the advantage that the exhaust emission reaches the emission standard by controlling the burning process and the catalytic reaction of harmful exhaust, thereby being popularized and applied to various types of vehicles.
Description
Technical field
The present invention relates to the emission control technique of Vehicular exhaust, refer in particular to a kind of vehicle exhaust emission control technology.
Background technique
Along with development of global economy and progress of science and technology, people more and more pay attention to people's health level, particularly to the improvement of the environment that influences health of people, emission of automobile wastes control is exactly an extremely urgent systems engineering, according to China's light-duty vehicle pollutant emission limit and method of measurement (Chinese III, IV stage) GB18352.3-2005 standard-required, the production and selling closing date of each vehicle is as follows:
The discharging of automobile exhaust pollution thing, the emission limit state III and the state IV stage of testing as the I type contrast as follows:
Can draw from last table, the control limit value that the state IV stage discharges pollutants requires to have exceeded more than one times than the state IV stage, and the exhaust emissions of domestic automobile does not reach the standard-required of country at all at present, must carry out innovative design to the emission of automobile wastes control technique, could satisfy the requirement of country auto-pollution thing emission limit and method of measurement.
The discharge of harmful gases of automobile is mainly residual from the fuel oil of evaporation, crankcase waste gas and the intake manifold of the gas of combustion of motor, fuel tank, composition harmful in the gas is hydrocarbon (HC), carbon monoxide (CO) and oxynitrides (NOx), and the control technique of emission from vehicles is exactly that the waste gas that said system produces is carried out emission control.
Summary of the invention
The objective of the invention is to utilize engine electric-controlled management system, accurately control enters proportions of ingredients, combustion process and the waste gas conversion of interior air of engine cylinder and fuel oil, to reach the optimization engine performance, improve the car steering performance, and more strictly the Control of Automobile waste gas of discharging forms a kind of brand-new vehicle exhaust emission control technology for the pollution of air.
The object of the present invention is achieved like this:
Vehicle exhaust emission control technology, be by being installed in the cooling-water temperature transmitter on the automobile, intake air temperature sensor, air inlet pressure sensor and lambda sensor are gathered the signal of motor car engine work and exhaust emissions and are passed to engine control module ECU, ECU adjusts optimum igniting and best oil spout opportunity of motor in real time according to the technical parameter of setting, to reach minimum discharge amount of exhaust gas, the motor car engine waste gas after burning imports in the ternary catalyzing unit further carries out oxidation reaction to hydrocarbon and carbon monoxide, convert water vapor and carbon dioxide to, simultaneously the nitrogen oxide reduction reaction is become behind the nitrogen outside the discharge motor.
Above-mentioned cooling-water temperature transmitter is installed on the cylinder body of motor.
Above-mentioned intake air temperature sensor and air inlet pressure sensor are installed in after the air intake filter, on the air inlet pipeline before the firing chamber of motor.
Above-mentioned lambda sensor includes and is installed in first ternary catalyzing unit preceding lambda sensor before and is installed in second ternary catalyzing unit post oxygen sensor before.
The internal structure of above-mentioned ternary catalyzing unit is a honeycomb conduits, and the coating that platinum, rhodium and palladium precious metal element are arranged on the honeycomb tube wall is as the catalytic reaction matchmaker, ternary catalyzing unit be serially connected in gas exhaust manifold and and silencing apparatus between, after the lambda sensor.
The outstanding compared to existing technology advantage of the present invention is:
1, the invention solves the exhaust emissions problem not up to standard of vehicle,, make the discharge tail gas requirement that can be up to state standards fully by the control combustion process and to the catalytic reaction of harmful exhaust;
2, controlling schemes of the present invention is reasonable in design, and control accuracy is accurate, and the system reliability height can be applicable on various types of automobiles.
Description of drawings
Fig. 1 is a control principle schematic representation of the present invention;
Fig. 2 is the electrical schematic diagram of temperature transducer of the present invention;
Fig. 3 is the schematic perspective view of lambda sensor of the present invention;
Fig. 4 is an engine control module ECU control ignition system schematic of the present invention;
Fig. 5 is an engine control system schematic representation of the present invention.
Embodiment
With specific embodiment the present invention is further described below, referring to Fig. 1-5:
Vehicle exhaust emission control technology, be by being installed in the cooling-water temperature transmitter 60 on the automobile, intake air temperature sensor 20, air inlet pressure sensor 21 and lambda sensor (lambda sensor 40 and post oxygen sensor 41 before comprising) are gathered the signal of motor car engine work and exhaust emissions and are passed to engine control module ECU, ECU adjusts optimum igniting and best oil spout opportunity of motor in real time according to the technical parameter of setting, to reach minimum discharge amount of exhaust gas, the waste gas that motor car engine is discharged after the oil inflame of oil sprayer 30 ejection imports in the ternary catalyzing unit (comprising prime catalyst converter 50 and back level catalyst converter 51) and further hydrocarbon and carbon monoxide is carried out oxidation reaction, convert water vapor and carbon dioxide to, discharge outside the motor after simultaneously the nitrogen oxide reduction reaction being become nitrogen, simultaneously, the waste gas of the waste gas of crankcase discharge and fuel tank evaporation discharge meets the requirement of GB18352.3-2005 NBS quadravalence section limit value.
It is the microprocessor of core with the single-chip microcomputer that engine control module ECU is one, its function is exactly the sensing data of handling from the car load different parts, judge the working condition of motor, by final controlling element the controllable part of motor is controlled accurately, the control section of motor is referring to Fig. 5 again.
The key property of engine control module ECU is: install in high performance 16 monolithic processors, 10 analog-to-digital conversion devices, the rewritable internal memory of 128Kb, 8Kb RAM storage, the operator cabin, operating temperature :-40～85 ℃, normal working voltage: 9～16V, malfunction voltage: 6.3～9V, 16～24V, overvoltage protection :-12V～24V.
Firing time, the function of control was exactly the firing command of sending according to engine control module, in time the air in the ignition engine cylinder and the mixed gas of fuel oil.
What system adopted is the grouping igniting, and it is divided into two groups of 1-4,2-3 (referring to Fig. 4) with four cylinders of motor, the control of lighting a fire respectively, and the timing of igniting and the driving of coil are finished by ECM
Nozzle arrangements is an electromagentic switching apparatus.Coil is drawn the two poles of the earth and is linked to each other with power supply with ECM through engine wiring harness; Coil is subjected to ECM control to after the conducting systematically, produces the pull of vacuum that magnetic force overcomes the pressure and the manifold of spring force, fuel oil, picks up iron core, and fuel oil just passes the valve opening sealing surface with the iron core one, from the pilot hole ejection, is sprayed onto the intake valve place vaporificly; After the outage, magnetic force disappearance nozzle is closed.
Motor is under normal working temperature, its sub load is controlled to be closed loop fuel control, at this moment, system is according to the voltage signal of the feedback of lambda sensor (referring to the stereogram in kind of Fig. 3), by the Motronic control maps control module fuel injection quantity is revised to reach in real time and adjust mixture strength near theoretical air fuel ratio, to guarantee that three-way catalytic converter reaches the optimum state to harmful gas conversion efficiency in the exhaust, can guarantee fuel economy preferably simultaneously.
In the normal working of engine process, the driver unclamps gas pedal, and vehicle enters and slides and the anti-motor that drags, and at this moment, automobile does not need motor that power is provided; And because after throttle valve cut out fully, air inflow was very little, motor can increase because of the bad noxious emission that causes that burns, therefore, system will cut off fuel feeding at this moment, can reduce the generation of Engine's Harmful Emission so greatly, simultaneously, also can improve fuel economy.
Above-mentioned cooling-water temperature transmitter 60 is installed on the water tank of motor, is used for the operating temperature of detection of engine, and ECM will be according to different temperature, for motor provides best controlling schemes.
Above-mentioned intake air temperature sensor 20 and air inlet pressure sensor 21 are installed in after the air intake filter 10, on the air inlet pipeline before the firing chamber of motor 90, intake air temperature sensor 20 is used to detect the air temperature that enters cylinder, because changing, gas temperature will directly have influence on its density, therefore, it is to calculate to enter one of important parameter of cylinder internal amount of actual air for combustion.
Above-mentioned lambda sensor is installed between exhaust valve and the ternary catalyzing unit, includes to be installed in prime catalyst converter 50 preceding lambda sensor 40 before and to be installed in back level catalyst converter 51 post oxygen sensor 41 afterwards;
Lambda sensor is an important symbol part of closed loop fuel control system, its is adjusted and keeps desirable air fuel ratio, make ternary catalyzing unit reach best conversion efficiency, when the sky that participates in engine combustion so when thinning, oxygen among the exhaust is assembled content to be increased, the output voltage of lambda sensor reduces, on the contrary output voltage values then increase, thus to the ECM feedback empty so than situation;
The main sensitive material of lambda sensor is a zirconium oxide, and after zirconium oxide was deflated heating (300 ℃) activation, oxonium ion passed zirconia component and arrives its outer electrode, and the content of the oxygen in the exhaust of zirconia component induction generator also changes its output voltage values;
Lambda sensor adopts the polytetrafluoroethylene insulated conductor, the profile member of stainless steel material, and reference air is imported by lead;
The internal structure of above-mentioned ternary catalyzing unit is a honeycomb conduits, the coating that platinum, rhodium and palladium precious metal element are arranged on the honeycomb tube wall is as the catalytic reaction matchmaker, the power loss of ternary catalyzing unit about 3～4%, ternary catalyzing unit be serially connected in gas exhaust manifold and and silencing apparatus between, after the lambda sensor, catalyzer in the ternary catalyzing unit can promote the oxidation reaction of hydrocarbon (HC) and carbon monoxide (CO), converts it to water vapor (H respectively
2O) and carbon dioxide (CO
2), simultaneously nitrogen oxide (NOx) reduction reaction is become nitrogen (N
2), catalyst converter to the oxidation reaction of HC and CO in air fuel ratio greater than reaching best more than 14.5, and the reduction reaction of NOx was reached best in air fuel ratio less than 14.8 o'clock, and take into account two aspects, the comprehensive transformation efficiency of ternary catalyzing unit is between 14.6～14.7 air fuel ratio.
In order to check discharge value to pollutant in the various operating modes of motor, company has carried out the detection of a plurality of operating modes in the automobile experiment chamber, to simulate the situation of different kinds of roads, make automobile under the different kinds of roads working condition, reach best exhaust emissions control, simultaneously in order to satisfy the use of China various places, for carrying out the polar region promptly: " three height " test: company is the highest in China's temperature respectively, temperature is minimum, under three above sea level the highest environment the working condition of motor and the matching of car load are tested, company arranges vehicle to go to the Turfan in Xinjiang and the Kun Lun Mountain in Qinghai to carry out the test on high temperature and plateau respectively, go to the Heihe in northeast to carry out low temperature test, by above-mentioned simulation test and " three height " evidence, auto-pollution thing discharge value meets (Chinese III fully, the IV stage) standard code of GB18352.3-2005, under average service conditions and in the automobile ordinary life phase, 5 years or 100000 kilometers internal contamination control gear can remain its function.
Claims (5)
1. vehicle exhaust emission control technology, it is characterized in that: by being installed in the cooling-water temperature transmitter on the automobile, intake air temperature sensor, air inlet pressure sensor and lambda sensor are gathered the signal of motor car engine work and exhaust emissions and are passed to engine control module ECU, ECU adjusts optimum igniting and best oil spout opportunity of motor in real time according to the technical parameter of setting, to reach minimum discharge amount of exhaust gas, the motor car engine waste gas after burning imports in the ternary catalyzing unit further carries out oxidation reaction to hydrocarbon and carbon monoxide, convert water vapor and carbon dioxide to, the nitrogen oxide reduction reaction is become behind the nitrogen to discharge outside the motor.
2. vehicle exhaust emission control technology according to claim 1 is characterized in that: described cooling-water temperature transmitter is installed on the cylinder body of motor.
3. vehicle exhaust emission control technology according to claim 1 is characterized in that: described intake air temperature sensor and air inlet pressure sensor are installed in after the air intake filter, on the air inlet pipeline before the firing chamber of motor.
4. vehicle exhaust emission control technology according to claim 1 is characterized in that: described lambda sensor includes and is installed in first ternary catalyzing unit preceding lambda sensor before and is installed in second ternary catalyzing unit post oxygen sensor afterwards.
5. vehicle exhaust emission control technology according to claim 1, it is characterized in that: the internal structure of described ternary catalyzing unit is a honeycomb conduits, the coating that platinum, rhodium and palladium precious metal element are arranged on the honeycomb tube wall is as the catalytic reaction matchmaker, ternary catalyzing unit be serially connected in gas exhaust manifold and and silencing apparatus between, after the lambda sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810136562A CN101749135A (en) | 2008-12-17 | 2008-12-17 | Vehicle exhaust emission control technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810136562A CN101749135A (en) | 2008-12-17 | 2008-12-17 | Vehicle exhaust emission control technology |
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| CN101749135A true CN101749135A (en) | 2010-06-23 |
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| CN200810136562A Pending CN101749135A (en) | 2008-12-17 | 2008-12-17 | Vehicle exhaust emission control technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817731A (en) * | 2012-08-15 | 2012-12-12 | 广东西电动力科技股份有限公司 | Waste gas purification apparatus for diesel generating set |
| CN107436160A (en) * | 2016-05-27 | 2017-12-05 | 福特全球技术公司 | Vehicle sensors low temperature is alleviated |
| CN107608262A (en) * | 2017-09-05 | 2018-01-19 | 无锡吉兴汽车声学部件科技有限公司 | A kind of laboratory vehicle exhaust concentration intelligence control system |
| CN107916977A (en) * | 2016-10-06 | 2018-04-17 | 福特全球技术公司 | Hydrocarbon emission monitors |
| CN109854397A (en) * | 2019-04-04 | 2019-06-07 | 江西五十铃汽车有限公司 | A kind of vehicle exhaust after-treatment system can effectively reduce discharged nitrous oxides |
| CN113431668A (en) * | 2021-08-05 | 2021-09-24 | 潍柴动力股份有限公司 | Three-way catalyst monitoring method in engine exhaust system and vehicle |
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| CN2345701Y (en) * | 1998-08-19 | 1999-10-27 | 淄博乔岳电子电器有限公司 | Electronic regulated ternary catalytic purification device for motor vehicle |
| CN2370164Y (en) * | 1999-04-26 | 2000-03-22 | 大连英联科技开发有限公司 | Purifier for pollutant of gasoline engine exhaust gas |
| CN1379171A (en) * | 2001-04-02 | 2002-11-13 | 杜卡提·恩勒基公司 | Method and device for controlling discharge of harmful matter of internal combustion engine |
| CN2591241Y (en) * | 2002-12-20 | 2003-12-10 | 上汽集团奇瑞汽车有限公司 | Vehicle exhaust muffler |
| CN1904329A (en) * | 2006-08-15 | 2007-01-31 | 北京工业大学 | Hydrogen gasoline mixed fuel engine and its control method |
| CN1918381A (en) * | 2004-02-09 | 2007-02-21 | 雅马哈发动机株式会社 | Exhaust gas purifying device for engine |
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Patent Citations (6)
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| CN2345701Y (en) * | 1998-08-19 | 1999-10-27 | 淄博乔岳电子电器有限公司 | Electronic regulated ternary catalytic purification device for motor vehicle |
| CN2370164Y (en) * | 1999-04-26 | 2000-03-22 | 大连英联科技开发有限公司 | Purifier for pollutant of gasoline engine exhaust gas |
| CN1379171A (en) * | 2001-04-02 | 2002-11-13 | 杜卡提·恩勒基公司 | Method and device for controlling discharge of harmful matter of internal combustion engine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817731A (en) * | 2012-08-15 | 2012-12-12 | 广东西电动力科技股份有限公司 | Waste gas purification apparatus for diesel generating set |
| CN107436160A (en) * | 2016-05-27 | 2017-12-05 | 福特全球技术公司 | Vehicle sensors low temperature is alleviated |
| CN107916977A (en) * | 2016-10-06 | 2018-04-17 | 福特全球技术公司 | Hydrocarbon emission monitors |
| CN107608262A (en) * | 2017-09-05 | 2018-01-19 | 无锡吉兴汽车声学部件科技有限公司 | A kind of laboratory vehicle exhaust concentration intelligence control system |
| CN107608262B (en) * | 2017-09-05 | 2020-10-09 | 无锡吉兴汽车声学部件科技有限公司 | Intelligent control system for concentration of automobile exhaust in laboratory |
| CN109854397A (en) * | 2019-04-04 | 2019-06-07 | 江西五十铃汽车有限公司 | A kind of vehicle exhaust after-treatment system can effectively reduce discharged nitrous oxides |
| CN113431668A (en) * | 2021-08-05 | 2021-09-24 | 潍柴动力股份有限公司 | Three-way catalyst monitoring method in engine exhaust system and vehicle |
| CN113431668B (en) * | 2021-08-05 | 2022-04-05 | 潍柴动力股份有限公司 | Three-way catalyst monitoring method in engine exhaust system and vehicle |
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Application publication date: 20100623 |