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An automobile exhaust repurification system and purification method thereof

An automobile exhaust and repurification technology, which is applied in exhaust devices, air quality improvement, noise reduction devices, etc., can solve problems such as high cost, great difficulty, and complex system structure

Active Publication Date: 2016-01-13
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this scheme can only treat HC, and the temperature of HC desorption is not high. At this temperature, the conversion efficiency of the catalyst has not been stabilized at a high level, so the catalytic effect is limited.
The system structure of the above-mentioned active technical solution is relatively complicated, and the system needs to install a large number of microprocessor-controlled valves and sensors. It is relatively difficult to implement and the cost will be high

Method used

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  • An automobile exhaust repurification system and purification method thereof

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Embodiment 1

[0026] see figure 1 , the present embodiment provides an automobile exhaust gas repurification system, comprising an exhaust manifold 1, a pre-catalyst assembly 3, a bellows 4, a main catalytic converter assembly 5, and a front muffler sequentially connected by a connecting pipeline 2 The assembly 6 and the rear muffler assembly 7 also include the one-way control valve I8, the air pump 9, the exhaust gas storage tank 10 and the one-way control valve II11, and the one-way control valve I8 is installed in the connecting pipeline before the front muffler assembly 6 2; one end of the exhaust gas storage tank 10 is connected to the connecting pipeline 2 in front of the one-way control valve I8 through the air pump 9, and the other end is connected to the connecting pipeline 2 in front of the main catalytic converter assembly 5 through the one-way control valve II11 .

[0027] The one-way control valve I8, the air pump 9 and the one-way control valve II11 are connected to the ECU 1...

Embodiment 2

[0032] This embodiment provides a purification method for an automobile exhaust gas repurification system, comprising the following steps:

[0033] 1. At the beginning of the cold start of the car, due to the low temperature of the catalyst, the light-off temperature cannot be reached, and the conversion efficiency of the catalyst to the exhaust gas is low. The ECU12 controls the one-way control valve I8 and the one-way control valve II11 to close and the air pump 9 to open. The exhaust gas from the engine is discharged from the exhaust manifold 1 and then passes through the pre-catalyst assembly 3 and the main catalytic converter assembly 5 after catalytic reaction. It will not be discharged into the atmosphere through the front muffler assembly 6 and the rear muffler assembly 7, but the air pump 9 will compress this part of the exhaust gas and make it enter the exhaust gas storage tank 10 to temporarily store the exhaust gas. The air pump 9 used must be matched and calibrate...

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Abstract

The invention discloses an automobile exhaust repurification system and a purification method of the automobile exhaust repurification system. The exhaust repurification system is added on the basis of the traditional automobile exhaust system, and comprises two one-way control valves, an air pump (9) and a tail gas storage tank (10). Partial exhaust tail gas generated by an automobile in the cold starting stage is stored and collected after being compressed, after the exhaust temperature of an engine is raised, the catalyst conversion efficiency is stabilized at a very high level, then, the collected and stored exhaust tail gas is gradually released, and the partial tail gas is catalyzed and converted through a catalytic converter again, so the problem of high emission of the automobile in the cold starting stage is solved.

Description

technical field [0001] The invention belongs to the field of automobile emission control, in particular to an automobile exhaust repurification system and a purification method thereof. Background technique [0002] As a widely used exhaust gas purification device at present, the three-way catalytic converter mainly uses catalysts to convert harmful gas components such as CO, HC, and NOx in the exhaust into harmless gases for discharge. [0003] In order to reduce the emission in the cold start stage and make the vehicle meet the emission limit requirements, some catalyst rapid light-off technologies have been produced and applied. They can be divided into two categories: (1) Passive technology: changing the design of the exhaust system (such as placing the catalytic converter close to the engine, using pre-catalysts, and HC traps) to reduce cold-start emissions. (2) Active technology: During cold start, use additional controllable energy to increase the exhaust temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28
CPCY02A50/20
Inventor 李薛
Owner CHERY AUTOMOBILE CO LTD