CN102322323A - Three-way catalytic reactor protecting system for automobile - Google Patents
Three-way catalytic reactor protecting system for automobile Download PDFInfo
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- CN102322323A CN102322323A CN201110238668A CN201110238668A CN102322323A CN 102322323 A CN102322323 A CN 102322323A CN 201110238668 A CN201110238668 A CN 201110238668A CN 201110238668 A CN201110238668 A CN 201110238668A CN 102322323 A CN102322323 A CN 102322323A
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- way catalytic
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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
- Y02T10/40—Engine management systems
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Abstract
The invention provides a three-way catalytic reactor protecting system for an automobile, which belongs to the technical field of vehicles. The technical problems of poor purification effect, short service life and the like of a traditional automobile three-way catalytic reactor are solved. In the three-way catalytic reactor protecting system for the automobile, a vehicle comprises an exhaust pipe and a three-way catalytic reactor, wherein the exhaust pipe is communicated with an engine exhaust manifold; the three-way catalytic reactor is connected to the exhaust pipe. The protecting system comprises an electrically controlled unit (ECU) and a sensing element which is arranged on the exhaust pipe and can detect tail gas temperature, wherein the sensing element is connected with the ECU. A cooling device capable of reducing the tail gas temperature in the exhaust pipe is arranged on the exhaust pipe between the exhaust manifold and the three-way catalytic reactor and is connected with the ECU through a control mechanism capable of controlling the cooling device to cool tail gas forcibly. By reducing the tail gas temperature, the three-way catalytic reactor can be effectively protected. At the same time, the three-way catalytic reactor protecting system for the automobile has the advantages of low energy consumption, high environmental friendliness and the like.
Description
Technical field
The invention belongs to the vehicle technology field, relate to a kind of automobile three-way catalytic converter protective system.
Background technique
Automobile is bringing many whiles easily as the present topmost traffic tool to people, automobile also is the main source of energy consumption and pollutant emission.According to the statistic of classification in urban atmospheric pollution thing source, in China big city, existing about 80% pollutant derives from vehicle exhaust.A large amount of vehicle exhausts concentrate on the city discharging, make some metropolitan air qualities worsen, and environmental protection is broken at the eyebrows and eyelashes.For tackling problems such as serious day by day motor vehicle exhaust emission and petroleum fuel worsening shortages; The new clean fuel that substitutes is constantly explored by automobile enterprise both at home and abroad; Wherein, Advantages such as compressed natural gas (CNG) automobile is good with its relative low price, fuel safety, cleaning, environmental protection, apply in each big city at home.As the CNG and the gasoline performance of vehicle fuel, the point of ignition of CNG is higher 220 ℃ than gasoline, and velocity of combustion is slow; Octane value and compression ratio difference high 30% and 20%; Heat vale of mixture is low by 12%, power low 11%.Therefore, adopt CNG to act as a fuel, certainly will need high-energy ignition, strengthen ignition advance angle and improve compression ratio, cause compression stroke pressure and temperature at the end all can increase, the also corresponding raising of exhaust temperature if will reach the power character identical with gasoline.
In addition, in order to reduce the automobile harmful gas discharging, three-way catalytic converter is installed in automobile exhaust system all usually.Three-way catalytic converter can change the harmful gases such as CO, HC and NOx that vehicle exhaust is discharged into harmless carbon dioxide, water and nitrogen through oxidation and reduction, reduces the purpose of polluting to reach.Three-way catalytic converter does not possess catalytic capability under the normal temperature; Its catalyzer must be heated to the ability that uniform temperature just has oxidation or reduction; Usually the initiation temperature of three-way catalytic converter is 200 ℃, and optimum working temperature is at 400 ℃～800 ℃, when temperature surpasses 850 ℃～1000 ℃; Will cause the carrier coating structural transformation in the three-way catalytic converter, its specific surface area is sharply reduced.Precious metal composition self as catalyzer also can produce sintering, gathering and chemical change, and high temperature can cause that simultaneously catalyst activity and oxygen storage capacity reduce, and causes the three-way catalytic converter decreased performance, at high temperature works for a long time, and deterioration phenomenon can take place.
The operating temperature of three-way catalytic converter depends primarily on the temperature of tail gas.Therefore, when utilizing the three-way catalytic converter cleaning of off-gas,, particularly important to the control of exhaust temperature in order to protect three-way catalytic converter.Yet as the automobile with compressed natural gas of clean environment-friendly, the exhaust temperature of its engine emission is very high, and general automobiles also can be discharged the tail gas of higher temperature under high load, high speed conditions.Existing automobile is not owing to possess the cooling unit that reduces exhaust temperature; Make three-way catalytic converter under the too high temperature of being everlasting, work; Make that on the one hand three-way catalytic converter inner catalyst catalytic activity reduces; Cause the three-way catalytic converter purifying effect to be affected, make more noxious gas emission in air, cause environmental pollution; On the other hand, high-temperature tail gas also can cause fatal damage to three-way catalytic converter, greatly reduces the working life of three-way catalytic converter.
Summary of the invention
The objective of the invention is to have the problems referred to above to existing technology, proposed a kind of automobile three-way catalytic converter protective system, this protective system can be protected three-way catalytic converter effectively through reducing exhaust temperature.
The object of the invention can be realized through following technical proposal: a kind of automobile three-way catalytic converter protective system, automobile comprise the outlet pipe that is connected with enmgine exhaust and are connected the three-way catalytic converter on the outlet pipe; This protective system comprises ECU and is arranged on the sensor that can detect exhaust temperature on the outlet pipe that described sensor and ECU link; Outlet pipe between described gas exhaust manifold and the three-way catalytic converter is provided with the cooling unit that can reduce outlet pipe inner exhaust gas temperature; Whether described cooling unit forces Cooling Control mechanism and ECU to link to tail gas through controlling cooling unit.
The harmful gas that engine operation produces gets into three-way catalytic converter through gas exhaust manifold, outlet pipe respectively, becomes harmless gas through the three-way catalytic converter purification and is drained in the air.
The high-temperature tail gas that this automobile three-way catalytic converter protective system is discharged motor through cooling unit cools off, and prevents that the tail gas of excessive temperature from getting into the three-way catalytic converter reaction, plays the purpose of protection three-way catalytic converter.Above-mentioned sensor is a temperature transducer; ECU comes down to a kind of controller of automobile; Sensor can detect the temperature of tail gas in the outlet pipe, and detected information is passed to ECU, and ECU can carry out automatic computing, processing and judgement with the information that receives; Output order is given control mechanism then, and control mechanism can be controlled cooling unit and whether tail gas forced cooling.
In above-mentioned automobile three-way catalytic converter protective system, described cooling unit comprises and is set in heat dissipating pipe on the outlet pipe to have radiating wing on the outer wall of heat dissipating pipe.
In above-mentioned automobile three-way catalytic converter protective system, described control mechanism comprises guide duct relative with radiating wing and the blower fan that can in guide duct, infeed cold airflow, and described blower fan and ECU link.
In this automobile three-way catalytic converter protective system, the cold airflow that provides through blower fan acts on the exhaust temperature reduction that makes on the heat dissipating pipe in the outlet pipe, reaches the purpose of protection three-way catalytic converter.Radiating wing is set on the heat dissipating pipe, can increases the heat diffusion area of heat dissipating pipe greatly, heat radiation is more prone to.Simultaneously, this control mechanism also be provided with one with radiating wing guide duct relatively, the cold airflow of blower fan can act on the radiating wing in the concentrated area through guide duct more, has improved radiating effect greatly, thereby protects three-way catalytic converter better.ECU and blower fan link; ECU can regulate blower fan cold airflow temperature according to actual conditions, thereby regulates specific heat load, and three-way catalytic converter is in the optimum working temperature scope; Guarantee that catalyst is active best as far as possible, reduce noxious gas emission to the full extent.
In above-mentioned automobile three-way catalytic converter protective system, described cooling unit comprises and is positioned at the outlet pipe outside and the exhaust tube wall spiral heat dissipating pipe that leans; One end of described heat dissipating pipe is connected with the automobile engine cooling liquid storage tank through liquid inlet pipe, and the other end is connected with radiator through drain pipe; Described control mechanism be arranged on the liquid inlet pipe or on the drain pipe and described control mechanism can control the flow velocity of heat dissipating pipe.
The cooling liquid that this cooling unit provides through the engine-cooling system heat dissipating pipe of flowing through, thus the exhaust temperature in the outlet pipe is reduced.Heat dissipating pipe is done curl, can increase the area of contact between heat dissipating pipe and the outlet pipe to a great extent, improve radiating effect then, to protect three-way catalytic converter better.
Coolant temperature through cooling unit flows out is higher, and the cooling liquid of this higher temperature is carried out cool cycles again through radiator cooling entering motor.
In above-mentioned automobile three-way catalytic converter protective system, described control mechanism comprises that one is arranged on the mortor operated valve on the liquid inlet pipe or on the drain pipe, and electric control element and ECU in the described mortor operated valve link.
Mortor operated valve is coupled together by electric control element and valve usually, connects electric control element through electric energy as power and drives valve, realizes switch, the adjusting action of valve.Adopt mortor operated valve as control mechanism; Mortor operated valve can also be regulated the flow velocity of cooling liquid when the realization cooling liquid is ended or circulated according to the instruction that ECU sends; Thereby adjusting specific heat load; Three-way catalytic converter is in the optimum working temperature scope, guarantees that catalyst is active best as far as possible, reduce noxious gas emission to the full extent.
In above-mentioned automobile three-way catalytic converter protective system, described sensor is one to be arranged on the temperature transducer of three-way catalytic converter inlet.
In above-mentioned automobile three-way catalytic converter protective system, described sensor is one to be arranged on the temperature transducer in three-way catalytic converter outlet port.
In above-mentioned automobile three-way catalytic converter protective system; Described sensor comprises two temperature transducers that all link with ECU; One of them temperature transducer is arranged on three-way catalytic converter inlet, and another temperature transducer is arranged on the three-way catalytic converter outlet port.Through such design, realize that ECU is through temperature signal control cooling.Through temperature difference control, can more accurately control the reaction temperature of three-way catalytic converter, make the tail gas conversion ratio of the three-way catalytic converter of flowing through the highest.
In above-mentioned automobile three-way catalytic converter protective system, described heat dissipating pipe adopts copper or aluminium material to process.Copper and aluminium have thermal conductivity preferably, and heat dissipating pipe employing thermal conductivity material is preferably processed, and can reduce the heat radiation difficulty to a great extent, improves radiating effect.
Compared with prior art, this automobile three-way catalytic converter protective system has the following advantages:
1, this automobile three-way catalytic converter protective system makes cooling unit only just in running order in exhaust temperature exceeds specified scope through ECU control control mechanism, has played the purpose that cuts down the consumption of energy.
2, control mechanism is controlled by ECU; ECU can regulate cooling liquid speed in the height of blower fan cold airflow temperature or the heat dissipating pipe according to actual conditions; Thereby adjusting specific heat load; Three-way catalytic converter is in the optimum working temperature scope, and the tail gas conversion ratio of the three-way catalytic converter that guarantees to flow through is the highest as far as possible, reduces noxious gas emission to the full extent.
3, this automobile three-way catalytic converter protective system heat dissipating pipe is provided with radiating wing, perhaps heat dissipating pipe is done curl, through such design; Increased heat diffusion area to a great extent; Reduce the heat radiation difficulty, improved radiating effect, protect three-way catalytic converter then better.
4, this automobile three-way catalytic converter protective system can be protected three-way catalytic converter effectively, has advantages such as low energy consumption, high environmental protection simultaneously.
Description of drawings
Fig. 1 is first kind of structure principle chart of this automobile three-way catalytic converter protective system.
Fig. 2 is second kind of structure principle chart of this automobile three-way catalytic converter protective system.
Fig. 3 is the third structure principle chart of this automobile three-way catalytic converter protective system.
Among the figure, 1, motor; 2, gas exhaust manifold; 3, outlet pipe; 4, heat dissipating pipe; 5, three-way catalytic converter; 6, temperature transducer; 7, radiator; 8, mortor operated valve; 9, liquid inlet pipe; 10, drain pipe.
Embodiment
Below be specific embodiment of the present invention and combine accompanying drawing, technological scheme of the present invention is done further to describe, but the present invention is not limited to these embodiments.
As shown in Figure 1, this automobile three-way catalytic converter protective system comprises parts and cooling unit and control mechanisms such as ECU, sensor, radiator 7.
Specifically, this automobile comprises motor 1, the outlet pipe 3 that is connected with motor 1 gas exhaust manifold 2 and is connected the three-way catalytic converter 5 on the outlet pipe 3.In order to reduce the temperature of vehicle exhaust; Three-way catalytic converter 5 is worked in the best temperature scope; To reach best catalytic effect, prevent that simultaneously high-temperature tail gas from causing damage to three-way catalytic converter 5, on the outlet pipe 3 between motor 1 gas exhaust manifold 2 and the three-way catalytic converter 5, be provided with the cooling unit that can reduce outlet pipe 3 inner exhaust gas temperature; Be provided with control mechanism in addition cooling unit is controlled, this control mechanism and ECU link.This ECU is connected with the sensor that can detect exhaust temperature.This sensor is a temperature transducer 6.Sensor is arranged on the outlet pipe 3; Sensor can detect the temperature signal of tail gas in the outlet pipe 3; And detected information passed to ECU; ECU can carry out automatic computing, processing and judgement with the information that receives, and output order is given control mechanism then, and control mechanism can be controlled cooling unit and whether tail gas forced cooling.
Like Fig. 2, shown in Figure 3, the quantity of temperature transducer 6 can be one, and it is arranged on three-way catalytic converter 5 inlets or outlet port.As shown in Figure 1, as optimal case, it is two that this automobile three-way catalytic converter protective system is selected the quantity of temperature transducer 6, and two temperature transducers 6 are separately positioned on the ingress and the outlet port of three-way catalytic converter 5.
In this automobile three-way catalytic converter protective system, cooling unit can be a heat dissipating pipe 4, and these heat dissipating pipe 4 cover houses are on outlet pipe 3.In order to reduce the heat radiation difficulty, heat dissipating pipe 4 adopts the good materials of thermal conductivity such as copper or aluminium to process, and simultaneously in order to increase heat diffusion area, the outer wall of heat dissipating pipe 4 is provided with radiating wing.Corresponding, the control mechanism of controlling this cooling unit is an ability provides a blower fan from cold airflow to heat dissipating pipe 4.Usually a guide duct that radiating wing is relative all is set between blower fan and heat dissipating pipe 4, the cold airflow of blower fan can be acted on the radiating wing in the concentrated area through guide duct more, improve radiating effect.This blower fan links to each other with ECU.
In addition, as preferably, the cooling unit that this automobile three-way catalytic converter protective system adopts is outlet pipe 3 outsides and the outlet pipe 3 outer walls spiral heat dissipating pipe 4 that leans.In order to reduce the heat radiation difficulty, heat dissipating pipe 4 adopts the good materials of thermal conductivity such as copper or aluminium to process.This cooling unit is based on motor 1 cooling system, and an end of heat dissipating pipe 4 is connected with the 1 of automobile engine coolant storage tank through liquid inlet pipe 9, and the other end is connected with radiator 7 through drain pipe 10.Cooling liquid in motor 1 coolant storage tank is carried out forced cooling through the 4 pairs of exhaust outlet pipes of heat dissipating pipe 3 of flowing through, thereby reduces the temperature of outlet pipe 3 inner exhaust gas.Accordingly, the control mechanism of controlling this cooling unit is the mortor operated valve 8 that is arranged on the liquid inlet pipe 9 or on the drain pipe 10, and mortor operated valve 8 can also be controlled the flow velocity of cooling liquid when the realization cooling liquid is ended or is communicated with, and this mortor operated valve 8 links to each other with ECU.
The function that this automobile three-way catalytic converter protective system is possessed realizes through following proposal:
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as outlet pipe 3, heat dissipating pipe 4, three-way catalytic converter 5, temperature transducer 6, radiator 7, liquid inlet pipe 9, drain pipe 10 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; It all is contrary with spirit of the present invention being construed to any additional restriction to them.
Claims (9)
1. automobile three-way catalytic converter protective system, automobile comprises the outlet pipe (3) that is connected with motor (1) gas exhaust manifold (2) and is connected the three-way catalytic converter (5) on the outlet pipe (3); It is characterized in that this protective system comprises ECU and be arranged on the sensor that can detect exhaust temperature on the outlet pipe (3) that described sensor and ECU link; Described outlet pipe (3) is provided with the cooling unit that can reduce outlet pipe (3) inner exhaust gas temperature; Described cooling unit is controlled by a control mechanism, and this control mechanism and ECU link.
2. automobile three-way catalytic converter protective system according to claim 1 is characterized in that, described cooling unit comprises that being set in outlet pipe (3) goes up heat dissipating pipe (4), has radiating wing on the outer wall of heat dissipating pipe (4).
3. automobile three-way catalytic converter protective system according to claim 2 is characterized in that, described control mechanism comprises guide duct relative with radiating wing and the blower fan that can in guide duct, infeed cold airflow, and described blower fan and ECU link.
4. automobile three-way catalytic converter protective system according to claim 1 is characterized in that, described cooling unit comprises and is positioned at outlet pipe (3) outside and outlet pipe (3) the outer wall spiral heat dissipating pipe (4) that leans; One end of described heat dissipating pipe (4) is connected with motor car engine (1) coolant storage tank through liquid inlet pipe (9), and the other end is connected with radiator (7) through drain pipe (10); Described control mechanism is arranged on that liquid inlet pipe (9) is gone up or drain pipe (10) is gone up and described control mechanism can be controlled the flow velocity of heat dissipating pipe (4).
5. automobile three-way catalytic converter protective system according to claim 4; It is characterized in that; Described control mechanism comprises that one is arranged on the liquid inlet pipe (9) or the mortor operated valve (8) on the drain pipe (10), and electric control element and ECU in the described mortor operated valve (8) link.
6. according to any described automobile three-way catalytic converter protective system in the claim 1 to 5, it is characterized in that described sensor is one to be arranged on the temperature transducer (6) of three-way catalytic converter (5) inlet.
7. according to any described automobile three-way catalytic converter protective system in the claim 1 to 5, it is characterized in that described sensor is one to be arranged on the temperature transducer (6) in three-way catalytic converter (5) outlet port.
8. according to any described automobile three-way catalytic converter protective system in the claim 1 to 5; It is characterized in that; Described sensor comprises two temperature transducers (6) that all link with ECU; One of them temperature transducer (6) is arranged on three-way catalytic converter (5) inlet, and another temperature transducer (6) is arranged on three-way catalytic converter (5) outlet port.
9. according to claim 4 or 5 described automobile three-way catalytic converter protective systems, it is characterized in that described heat dissipating pipe (4) adopts copper or aluminium material to process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102386686A CN102322323B (en) | 2011-08-19 | 2011-08-19 | Three-way catalytic reactor protecting system for automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102386686A CN102322323B (en) | 2011-08-19 | 2011-08-19 | Three-way catalytic reactor protecting system for automobile |
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| CN102322323A true CN102322323A (en) | 2012-01-18 |
| CN102322323B CN102322323B (en) | 2013-06-05 |
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| CN2011102386686A Active CN102322323B (en) | 2011-08-19 | 2011-08-19 | Three-way catalytic reactor protecting system for automobile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644031A (en) * | 2013-12-17 | 2014-03-19 | 刘新羽 | On-line cleaning control system and method for carbon deposits of direct-injection engine fuel system |
| CN106089369A (en) * | 2016-07-26 | 2016-11-09 | 郭荣春 | A kind of composite efficient automobile exhaust purifier |
| CN111237034A (en) * | 2020-03-13 | 2020-06-05 | 广州大华德盛热管理科技股份有限公司 | Land tail gas cooling device and weapon equipment |
| CN112145262A (en) * | 2020-08-28 | 2020-12-29 | 杨皓 | Three-effect automobile exhaust purifier |
| CN114592951A (en) * | 2022-03-10 | 2022-06-07 | 南通普盛动力有限公司 | Engine tail gas treatment system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201679541U (en) * | 2010-04-15 | 2010-12-22 | 江苏金驰车辆有限公司 | Explosion-proof diesel engine provided with cleaning-free tail gas purification low-temperature discharge system |
-
2011
- 2011-08-19 CN CN2011102386686A patent/CN102322323B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201679541U (en) * | 2010-04-15 | 2010-12-22 | 江苏金驰车辆有限公司 | Explosion-proof diesel engine provided with cleaning-free tail gas purification low-temperature discharge system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644031A (en) * | 2013-12-17 | 2014-03-19 | 刘新羽 | On-line cleaning control system and method for carbon deposits of direct-injection engine fuel system |
| CN106089369A (en) * | 2016-07-26 | 2016-11-09 | 郭荣春 | A kind of composite efficient automobile exhaust purifier |
| CN106089369B (en) * | 2016-07-26 | 2018-11-13 | 山东交通学院 | A kind of composite efficient automobile exhaust purifier |
| CN111237034A (en) * | 2020-03-13 | 2020-06-05 | 广州大华德盛热管理科技股份有限公司 | Land tail gas cooling device and weapon equipment |
| CN112145262A (en) * | 2020-08-28 | 2020-12-29 | 杨皓 | Three-effect automobile exhaust purifier |
| CN114592951A (en) * | 2022-03-10 | 2022-06-07 | 南通普盛动力有限公司 | Engine tail gas treatment system and method |
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| CN102322323B (en) | 2013-06-05 |
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Application publication date: 20120118 Assignee: Zhejiang Jirun Automobile Co., Ltd. Assignor: Zhejiang Geely Automobile Research Institute Co., Ltd., Zhejiang Geely Holding Group Company Limited Contract record no.: 2013990000888 Denomination of invention: Three-way catalytic reactor protecting system for automobile Granted publication date: 20130605 License type: Exclusive License Record date: 20131227 |
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