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Exhaust treatment system

A technology for exhaust gas treatment and exhaust pipe, applied in the direction of exhaust gas treatment, electronic control of exhaust gas treatment device, exhaust device, etc., can solve the problems of increasing harmful substance concentration, increasing fuel consumption rate, increasing mass fraction, etc. Achieve the effect of reducing emission increase, advancing working time, and shortening light-off time

Active Publication Date: 2015-03-11
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually the way to reduce the combustion temperature is to reduce the excess air coefficient, which means that the mass fraction of the fuel in the combustible mixture increases, and the concentration increases. The use of high-concentration fuel deteriorates the combustion reaction, reduces the combustion efficiency, and finally reduces the combustion temperature.
However, the purpose of reducing the combustion temperature is at the cost of increasing the fuel consumption rate, which will have a negative impact on the economic index of the engine. When the exhaust gas flows through the catalytic converter, its load increases, the flow velocity of the exhaust gas is relatively high, and the conversion is incomplete
Therefore, under the current technical conditions, there is a dilemma in the temperature control strategy

Method used

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  • Exhaust treatment system

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, an exhaust treatment system includes: a compressor 2 , an injector 8 , an exhaust pipe 7 and a controller 11 . The compressor 2 and the injector 8 are connected through pipelines, the exhaust pipe 7 is installed on the injector 8 , and the controller 11 is electrically connected with the compressor 2 through the first control line 12 . The compressor 2 is an electric-driven compressor, and the controller 11 can select PLC, single-chip microcomputer or other logic controllers or control circuits.

[0029] When in use, the exhaust pipe 7 is connected to the engine 6 and the catalytic converter 9 through pipelines, the compressor 2 compresses the air in the environment and pushes it to the injector 8, and the injector 8 sprays the pressurized air into the exhaust pipe 7. This air and the exhaust gas from the engine 6 are mixed in the exhaust pipe 7 and flow to the catalytic converter 9 for redox treatment. The rotational speed of the compressor...

Embodiment 2

[0034] An exhaust treatment system, which is improved on the basis of Embodiment 1, no longer directly connects the compressor 2 and the injector 8, but installs a first valve 3 between the compressor 2 and the injector 8, The first valve 3 is connected with the compressor 2 and the ejector 8 through pipelines, and the first valve 3 is also electrically connected with the controller 11 through a control line, and other structures are the same as those in the first embodiment. The advantage of this design is that the controller 11 can adjust the flow of air by directly regulating the opening degree of the first valve 3 . The first valve 3 adds a controllable point to the whole system, thereby improving the controllability and stability of the exhaust gas treatment system.

Embodiment 3

[0036] Such as figure 1As shown, an exhaust gas treatment system is improved on the basis of the first embodiment, the compressor 2 and the injector 8 are no longer directly connected, but a stabilized pressure is installed between the compressor 2 and the injector 8 The chamber 4 and the plenum chamber 4 are respectively connected to the compressor 2 and the injector 8 through pipelines, and other structures are the same as those in the first embodiment. The function of the plenum chamber 4 is to collect the airflow and stabilize the system pressure. Preferably, a first pressure sensor 21 is disposed in the pressure stabilizing chamber 4 , and the first pressure sensor 21 is electrically connected to the controller 11 through the second detection line 18 . The pressure value in the plenum chamber 4 is obtained by the first pressure sensor 21 and fed back to the controller 11. The controller 11 compares the pressure value of the plenum chamber 4 with the standard value, outpu...

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Abstract

The invention discloses an exhaust treatment system. Air is leaded into an exhaust pipe through an air compressor and an ejector, is mixed with waste gas in the exhaust pipe, and flows to a catalytic converter. The exhaust treatment system can adjust the temperature of the waste gas in the exhaust pipe and the excess air coefficient to satisfy optimal chemical reaction conditions of the catalytic converter; meanwhile, when an engine is started, a high-concentration fuel generates a large quantity of HC and CO; and the HC and CO are mixed with the leaded-in air in the catalytic converter for burning to heat the catalytic converter, so that the temperature of the catalytic converter quickly rises, the burning rising time of the catalytic converter is shortened, the working time is ahead of time, and the problem of injurant increment caused by the starting of the engine is reduced.

Description

technical field [0001] The invention belongs to a vehicle exhaust system, in particular to an exhaust treatment system. Background technique [0002] Automobiles powered by internal combustion engines have been developed for more than 100 years and have had a huge impact on the development and progress of human society. At the same time, due to the emission of automobile exhaust, the living environment of human beings has been severely damaged. Whether the exhaust pollution of internal combustion engines can be solved has become a prerequisite for the survival of this industry. [0003] Gasoline engines produce carbon monoxide (CO), carbon dioxide (CO 2 ) and water (H 2 O), oxygen and nitrogen generate nitrogen oxides (NOx) at high temperatures. Furthermore, it is impossible to burn all the fuel, so the emissions also include hydrocarbons (HC). CO, NOx and HC are the main pollutants, which will cause serious harm to human body and environment. The excess air ratio has a...

Claims

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Application Information

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IPC IPC(8): F01N9/00
CPCY02T10/40
Inventor 王强杨林强钱德猛范习民张军瑞胡昌良崔宁钱冬羽雷蕾邹凯王军张超
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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