CN1336291A - Electrically controlled monitoring synergist for automobile tail gas purifier - Google Patents
Electrically controlled monitoring synergist for automobile tail gas purifier Download PDFInfo
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- CN1336291A CN1336291A CN 00121175 CN00121175A CN1336291A CN 1336291 A CN1336291 A CN 1336291A CN 00121175 CN00121175 CN 00121175 CN 00121175 A CN00121175 A CN 00121175A CN 1336291 A CN1336291 A CN 1336291A
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- check valve
- management system
- tail gas
- electronic management
- synergist
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Abstract
The present invention relates to automobile tail gas cleaner electric controlling and monitering device, it is characterized in that it has an oxygen sensor installed near the air inlet of trielement catalytic cleaner and a temp. sensor installed on trielement catalytic clenaer, they are connected with electromagnetic one way valve by electric control center, the electromagnetic one way valve is communicated with tail gas exhaust pipe, the signals of oxygen sensor and temp. sensor are processed and compared by electric control center, then they are provided to control signal to electromagnetic one way valve, to execute precise oxygen supplement and fulfill high purification rate.
Description
The invention belongs to the purifying vehicle exhaust technical field, relate in particular to a kind of tonifying Qi and monitoring device of purifying vehicle exhaust.
Along with progress of science and technology, the raising of the development of social civilization and people's level of consumption, the environment that we depended on for existence is also constantly contaminated, and wherein the tail gas pollution of power actuated vehicle directly influences people's quality of life, and the infringement people's is healthy.In self-propelled vehicle market, the carburettor car is than refractory reason " heavy polluter ", and still according to the national conditions of China, it is unpractical banning the carburettor car, also is impossible.
Pollution problem at the carburettor car, adopt mostly in the market simultaneous oxidation reduction catalyst is installed, its regulation effect is relatively reliable and superior, but, the operating range of simultaneous oxidation reduction catalyst is narrow especially, has only driving engine under theoretical air/fuel ratio when promptly 14.7: 1 or work in 14.8: 1, the CO in the discharge tail gas, HC and NO
xRedox effectively.In other words, strict to the air/fuel ratio of driving engine, and the constructional feature of carburettor car self has determined it can not always work under the chemically correct fuel, make engine operation just need to install supporting control apparatus under theoretical air/fuel ratio.What adopt in the market is to add the check valve oxygenating before simultaneous oxidation reduction catalyst, and its weak point has:
1, tonifying Qi during the driving engine starting cold is difficult for promoting the temperature of simultaneous oxidation reduction catalyst, and clean-up effect is poor;
2, rare excessively exhaust emissions, tonifying Qi there is no need;
3, driving engine is under high load capacity, high rotating speed continuous working, and the tonifying Qi meeting causes cleaner accumulation temperature too high, will shorten life of catalyst greatly like this, can burn the three-element catalytic carrier when serious;
4, cleaner accumulation temperature is too high, and new dissociation reaction can take place the oxious component in the waste gas, generates secondary pollution.
Purpose of the present invention is intended to overcome above-mentioned shortcoming, provide a kind of can automatically regulating oxygen content and make it to reach the electrically controlled monitoring synergist for automobile tail gas purifier of ideal air-fuel ratio exhaust emissions in the tail gas.
For achieving the above object, the present invention adopts following solution: comprise exhaust gas oxygensensor and temperature sensor, it is characterized in that: an end of exhaust gas oxygensensor is installed near the simultaneous oxidation reduction catalyst inlet end, the other end connects the input end of electronic management system, oxygen sensor signal is set in the electronic management system receives amplifying circuit, signal comparator circuit, output amplifier, Drive and Control Circuit; One end of temperature sensor is installed on the simultaneous oxidation reduction catalyst, and the other end connects the input end of electronic management system, temperature sensor signal is set in the electronic management system receives amplifying circuit, comparison shaping circuit, output amplification driving circuit; The mouth of electronic management system is connected with the electromagnetism check valve; The electromagnetism check valve communicates with exhaust pipe.
Above-mentioned electrically controlled monitoring synergist for automobile tail gas purifier, it is characterized in that: described electromagnetism check valve comprises housing, check valve, electromagnetic valve, admission port, air extractor duct, one all boss are set in the centre of housing, between boss and air extractor duct, one check valve is installed by spring, under the effect of spring, check valve and boss sealing; Can become the electromagnetic valve of sealing state with it the another side setting of boss; Side at housing has admission port, and the outside of admission port is provided with the air-filtering cap.
Above-mentioned electrically controlled monitoring synergist for automobile tail gas purifier is characterized in that: also be provided with the signal display circuit of exhaust gas oxygensensor and temperature sensor in the described electronic management system, be connected with air/fuel ratio display instrument in being arranged on operator's compartment.
Above-mentioned electrically controlled monitoring synergist for automobile tail gas purifier is characterized in that: described exhaust gas oxygensensor also can be placed on the afterbody of vehicle exhaust freeing pipe.
Principle of work of the present invention is: behind the engine starting, when waste gas was discharged through freeing pipe, exhaust gas oxygensensor, temperature sensor were started working.When the cleaner temperature is lower than 200 ℃, the temperature sensor output low level, the signal that electronic management system output is closed, the electromagnetism closed check valve, this device is not worked; After the cleaner temperature is higher than 200 ℃, the signal that electronic management system output is opened, the electromagnetism one-way valve opens allows SOS work; After the cleaner temperature is higher than 800 ℃, the temperature sensor output low level, the signal that electronic management system output is closed, the electromagnetism closed check valve, this device is not worked.If oxygen content abundance in the waste gas, the exhaust gas oxygensensor output low level, the signal that electronic management system output is closed, the electromagnetism closed check valve, this device is not worked; If in the waste gas during anoxic, exhaust gas oxygensensor output high level, the signal that electronic management system output is opened, the electromagnetism one-way valve opens allows SOS work.
Behind the engine starting, the check valve in the electromagnetism check valve opens and closes with the variation of engine operating condition, and its frequency of operation is the frequency of engine operation, and promptly each exhaust process produces a negative exhaust pressure pulse, check valve is inhaled opened.The air supply passage of electromagnetism check valve is subjected to the control of electromagnetic valve, by the monitoring of exhaust gas oxygensensor, temperature sensor, through the calculation process of electronic management system, for electromagnetic valve provides working signal.Have only when electromagnetic valve and check valve are opened simultaneously, SOS could be realized tonifying Qi.
Compared with prior art, the present invention has following advantage:
1, the monitoring by exhaust gas oxygensensor, computing through electronic management system is compared, for the electromagnetism check valve provides control signal, can implement more accurate oxygenating, for cleaner provides a suitable window, give full play to the detergent power of three-way catalyst, realize the high purifying rate under the comprehensive operating mode, particularly the automobile unsteady-stage condition is also had tangible synergistic effect.
2, the monitoring by temperature sensor, when the cleaner temperature is lower than 200 ℃ and when being higher than 800 ℃, the electromagnetism closed check valve, this device is not worked, and so just can realize that low temperature limit benefit, high temperature limits benefit, prolongs the life-span of cleaner effectively.
3, the monitoring by exhaust gas oxygensensor, for the air/fuel ratio display instrument provides shows signal, so just can provide air/fuel ratio value under each operating mode of driving engine for the user, make things convenient for timely self check of user and maintenance, the air/fuel ratio display instrument can be the cleaner attachment point simultaneously, small-sized vehicle repairing factory provides the foundation of debugging former car.
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1, principle of work scheme drawing of the present invention.
The structural representation of Fig. 2, electromagnetism check valve of the present invention.
The circuit block diagram of Fig. 3, electronic management system of the present invention.
The schematic circuit diagram of Fig. 4, electronic management system of the present invention.
As shown in Figure 1, the present invention includes and be installed near exhaust gas oxygensensor of simultaneous oxidation reduction catalyst inlet end 3 and the temperature sensor 4 that is installed on the simultaneous oxidation reduction catalyst, exhaust gas oxygensensor 3 is connected with electromagnetism check valve 2 by electronic management system with temperature sensor 4, and electromagnetism check valve 2 communicates with exhaust pipe 1; Exhaust gas oxygensensor 3 and temperature sensor 4 can be with signal aspect and indication on the air/fuel ratio display instruments by the display circuit of electronic management system.
As shown in Figure 2, electromagnetism check valve 2 comprises housing 5, check valve 10, electromagnetic valve 8, admission port 7, air extractor duct 12, one all boss 9 are set in the centre of housing 5, between boss 9 and air extractor duct 12, a check valve 10 is installed by spring 11, under the effect of spring 11, check valve 10 and boss 9 sealings; Can become the electromagnetic valve 8 of sealing state with it the another side setting of boss 9; Have admission port 7 in the side of housing 5, the outside of admission port 7 is provided with air-filtering cap 6.
As shown in Figure 3, Figure 4, electronic management system of the present invention is by storage battery; Ignition lock; Oxygen sensor signal receives amplifying circuit, signal comparator circuit, output amplifier, display circuit, driving circuit; Temperature sensor signal receives amplifying circuit, comparison shaping circuit, display circuit, Drive and Control Circuit composition.
As shown in Figure 4, resistance R
1, R
2, R
3, capacitor C
1, C
2With op amp IC
1Form the oxygen sensor signal input amplifying circuit, resistance R
4, R
5, R
6, R
7, capacitor C
3With op amp IC
2Constitute signal comparator circuit, resistance R
8, aerotron VT
2Constitute output amplifier, inductance L, diode VD
3Constitute relay, the work of control electromagnetism check valve.
Among Fig. 4, IC
1, IC
2Be op amp, its operating voltage is between 2-30V, and the output signal voltage of exhaust gas oxygensensor is 0-1V, can not the direct drive actuator, so must be through amplifying.When exhaust emissions is denseer, exhaust gas oxygensensor output high level 1V, through amplifying, comparing, this signal voltage adds to aerotron VT
2Base stage, make VT
2Conducting, relay gets electric, and control electromagnetism one-way valve opens realizes tonifying Qi; When exhaust emissions was rarer, exhaust gas oxygensensor output low level 0V, this incoming signal were after computing relatively, and the signal of output can not make VT
2Conducting, relay is not worked, the electromagnetism closed check valve.
As shown in Figure 4, resistance R
21, R
23, R
24, LED
3, LED
4, display instrument constitutes display circuit.When oxygen content in the tail gas was low, the indication of air/fuel ratio display instrument was rare; Oxygen content height in tail gas, IC
2The signal of output is through resistance R
23Make LED
3Conducting, indicating relay energy normal operation, and the reflection exhaust emissions is dense, air/fuel ratio display instrument indication simultaneously is dense, aerotron VT
2Conducting, LED
4Conducting is sent tonifying Qi and is shown; Oxygen content is suitable in tail gas, through amplification ratio after, IC
2The voltage signal of output ripple, this moment, the air/fuel ratio display instrument was swung in the scope of " normally ", showed that engine air-fuel ratio is suitable; IC
2The fluctuating signal of output, after output was amplified, air compensation had been controlled in control electromagnetism check valve performance period, discountinuity tonifying Qi simultaneously.
As shown in Figure 4, resistance R
9, R
10, R
11With op amp IC
3Constitute the incoming signal amplifying circuit of temperature sensor; Resistance R
12, R
13, R
14, R
15, R
16, R
17, R
18With op amp IC
4, IC
5Constituent ratio is than shaping circuit; Resistance R
19, R
20, LED
1, LED
2Constitute temperature display circuit; Binary pair F
1, F
2, diode VD
1, VD
2, resistance R
22, aerotron VT
1, VT
2Constitute the output amplification driving circuit.
When the cleaner temperature was lower than 200 ℃, the temperature sensor output low level was through IC
3Computing is amplified, IC
5Relatively shaping makes LED
2Conducting shows cleaner " temperature is lower ", simultaneously, and binary pair F
2Work, aerotron VT
1Conducting forces VT
2End, control electromagnetism closed check valve is closed air compensating system; After the cleaner temperature is higher than 800 ℃, through IC
3Computing is amplified, and makes IC
4Output voltage signal, LED
1Conducting shows cleaner " temperature is too high ", simultaneously binary pair F
1Work, aerotron VT
1Conducting forces VT
2End, control electromagnetism closed check valve is closed air compensating system, thereby realizes the high temperature self-shield.
Claims (4)
1, a kind of electrically controlled monitoring synergist for automobile tail gas purifier, comprise exhaust gas oxygensensor and temperature sensor, it is characterized in that: an end of exhaust gas oxygensensor is installed near the simultaneous oxidation reduction catalyst inlet end, the other end connects the input end of electronic management system, oxygen sensor signal is set in the electronic management system receives amplifying circuit, signal comparator circuit, output amplifier, Drive and Control Circuit; One end of temperature sensor is installed on the simultaneous oxidation reduction catalyst, and the other end connects the input end of electronic management system, temperature sensor signal is set in the electronic management system receives amplifying circuit, comparison shaping circuit, output amplification driving circuit; The mouth of electronic management system is connected with the electromagnetism check valve; The electromagnetism check valve communicates with exhaust pipe.
2, electrically controlled monitoring synergist for automobile tail gas purifier according to claim 1, it is characterized in that: described electromagnetism check valve comprises housing, check valve, electromagnetic valve, admission port, air extractor duct, one all boss are set in the centre of housing, between boss and air extractor duct, one check valve is installed by spring, under the effect of spring, check valve and boss sealing; Can become the electromagnetic valve of sealing state with it the another side setting of boss; Side at housing has admission port, and the outside of admission port is provided with the air-filtering cap.
3, electrically controlled monitoring synergist for automobile tail gas purifier according to claim 1 is characterized in that: also be provided with the signal display circuit of exhaust gas oxygensensor and temperature sensor in the described electronic management system, be connected with air/fuel ratio display instrument in being arranged on operator's compartment.
4, electrically controlled monitoring synergist for automobile tail gas purifier according to claim 3 is characterized in that: described exhaust gas oxygensensor also can be placed on the afterbody of vehicle exhaust freeing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00121175 CN1336291A (en) | 2000-08-01 | 2000-08-01 | Electrically controlled monitoring synergist for automobile tail gas purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00121175 CN1336291A (en) | 2000-08-01 | 2000-08-01 | Electrically controlled monitoring synergist for automobile tail gas purifier |
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| Publication Number | Publication Date |
|---|---|
| CN1336291A true CN1336291A (en) | 2002-02-20 |
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ID=4588629
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00121175 Pending CN1336291A (en) | 2000-08-01 | 2000-08-01 | Electrically controlled monitoring synergist for automobile tail gas purifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652259B (en) * | 2007-04-06 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | Air pollution sensor system |
-
2000
- 2000-08-01 CN CN 00121175 patent/CN1336291A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652259B (en) * | 2007-04-06 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | Air pollution sensor system |
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