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Method used for cleaning automobile three-way catalytic converter

A technology for catalytic converters and automobiles, which is applied in chemical instruments and methods, cleaning methods using liquids, cleaning methods and utensils, etc., can solve problems such as low removal efficiency, improve vehicle power, avoid adverse effects, and prolong use. effect of life

Inactive Publication Date: 2014-01-15
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in this method, the removal efficiency of the cleaning agent on the solid deposits in the three-way catalytic converter after combustion in the combustion chamber is low

Method used

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  • Method used for cleaning automobile three-way catalytic converter
  • Method used for cleaning automobile three-way catalytic converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Use the three-way catalytic converter (model: 1810N) of the Volvo XC60 car, add deionized water to the red heart brand RH3008 steam generator, and clean the three-way catalytic converter according to the steps of the simulation test method. The vapor pressure was set at 3 Bar and the temperature at 160°C. Inject steam into the three-way catalytic converter for 5 minutes. Collect the solid particles falling from the three-way catalytic converter. The calculated cleaning rate is 28.74%.

[0038] The obtained solid particles were subjected to elemental analysis, and the results were as follows:

[0039]

[0040] The analysis results show that the deposits containing manganese (Mn), carbon (C) and phosphorus (P) can all be cleaned from the three-way catalytic converter.

Embodiment 2

[0042] Use the three-way catalytic converter of the Jetta car (model: 3344Eberspacher), add the hydrogen peroxide solution into the Red Heart brand RH3008 steam generator, and clean the three-way catalytic converter according to the steps of the simulation test method. The steam pressure was set at 2 Bar and the temperature was 150°C. Inject steam into the three-way catalytic converter for 10 minutes. Collect the solid particles falling from the three-way catalytic converter. The calculated cleaning rate is 35.16%.

[0043] The obtained solid particles were subjected to elemental analysis, and the results were as follows:

[0044]

[0045] The analysis results show that the deposits containing manganese (Mn), carbon (C) and phosphorus (P) can all be cleaned from the three-way catalytic converter.

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Abstract

The invention provides a method used for cleaning an automobile three-way catalytic converter. The method comprises the following steps that cleaning fluid is provided; the cleaning fluid is converted to cleaning steam; the cleaning steam is led into the three-way catalytic converter. According to the method, the high-temperature state of the three-way catalytic converter can be maintained, meanwhile, a good cleaning effect can be kept stably, sediment and deposited carbon on the surface of the three-way catalytic converter can be effectively removed, and bad influences on a liner of the three-way catalytic converter are avoided.

Description

technical field [0001] The invention relates to a method for cleaning a three-way catalytic converter of an automobile. Background technique [0002] The three-way catalytic converter is the most important external purification device installed in the automobile exhaust system. It can convert harmful gases such as CO, HC and NOx emitted from automobile exhaust into harmless carbon dioxide, water and nitrogen. In the use of automobiles, due to the unstable fuel quality, the fuel contains sulfur, phosphorus, and the antiknock agent MMT used contains manganese. These chemical components will form chemical compounds inside the three-way catalytic converter with the discharge of exhaust gas after combustion. complexes or deposits. In addition, due to the driver's bad driving habits or long-term driving on congested roads, the engine is often in an incomplete combustion state, which will form carbon deposits in the three-way catalytic converter. It is due to many factors that a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B3/04
CPCB08B3/06
Inventor 史志宇霍鑫郑弘哲彭建军
Owner 3M INNOVATIVE PROPERTIES CO
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