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Method for cleaning three-way catalyst without demounting three-way catalyst

A three-way catalytic converter and cleaning fluid technology, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve problems such as poor cleaning effect, achieve good cleaning effect, easy cleaning, and reduced fuel consumption

Inactive Publication Date: 2014-04-30
陈凤鸣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This cleaning method, because the cleaning agent enters through the vacuum tube, must be carried out when the vehicle is started, and the cleaning effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The Meng HD9002 model Buick Business 3.0V6 was used as the test model. The vehicle condition was as follows: the vehicle traveled 280,000 kilometers, replaced the three-way catalyst once at 150,000 kilometers, and then traveled 130,000 kilometers. The test site, Beijing-Qingdao one-way 700 kilometers.

[0041] Departing from Beijing and arriving in Qingdao, it took a total of 13 hours, with a maximum speed of 120 kilometers per hour, a journey of 700 kilometers, and a fuel consumption of 108 liters. During the driving of the car, the three-way catalytic failure alarmed many times and the power dropped. After arriving in Qingdao, clean the three-way catalytic converter without dismantling and cleaning. The method is as follows:

[0042] Shut down the engine and remove the oxygen sensor. After the temperature of the three-way catalytic converter is lower than 50°C, input 1 liter of water from the air inlet of the oxygen sensor, let the carrier in it fully absorb the water,...

Embodiment 2

[0047] The Mongolian H15238 model 1.8T Passat is used as the test model, and the vehicle condition is: the vehicle travels 230,000 kilometers.

[0048] When driving normally on the road, the power is seriously insufficient, and the fuel consumption per 100 kilometers is 13 liters. After parking, clean the three-way catalytic converter without dismantling and cleaning. The method is as follows:

[0049] Shut down the engine and remove the oxygen sensor. After the temperature of the three-way catalytic converter is lower than 50°C, input 0.8 liters of water from the air inlet of the oxygen sensor to allow the carrier in it to fully absorb the water, stay for 15 minutes, and then use a high-pressure watering can to spray 250ml of cleaning solution from the air inlet of the oxygen sensor In, spray the cleaning solution once every 1.5 minutes, continuously spray 6 times, and then keep the cleaning solution in the three-way catalytic converter for 17 minutes. The composition of th...

Embodiment 3

[0053] Beijing PG3850 model Audi A62.0T is used as the test model, and the vehicle condition is: the vehicle travels 120,000 kilometers.

[0054] Normal driving on the road, poor acceleration at the start, fuel consumption of 13 liters per 100 kilometers. After parking, clean the three-way catalytic converter without dismantling and cleaning. The method is as follows:

[0055] Shut down the engine and remove the oxygen sensor. After the temperature of the three-way catalytic converter is lower than 50°C, input 1.2 liters of water from the air inlet of the oxygen sensor to allow the carrier in it to fully absorb the water, stay for 18 minutes, and then use a high-pressure watering can to spray 330ml of cleaning fluid from the air inlet of the oxygen sensor In, spray the cleaning solution once every 3 minutes, continuously spray 7 times, and then keep the cleaning solution in the three-way catalytic converter for 15 minutes. The composition of the cleaning liquid is 26.4g tart...

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Abstract

The invention provides a method for cleaning a three-way catalyst without demounting the three-way catalyst. The method includes the steps that water is input from an oxygen sensor to conduct spray-wash on the three-way catalyst; cleaning liquid is input from an air inlet of the oxygen sensor to conduct spray-wash on the three-way catalyst washed with water, wherein the cleaning liquid comprises 3wt%-8wt% of tartaric acid, 5wt%-10wt% of citric acid, 8wt%-18wt% of glacial acetic acid, 3wt%-6wt% of malic acid, 10wt%-50wt% of scale and corrosion inhibitor, 0.06wt%-0.20wt% of EDTA and 15wt%-50wt% of deionized water; water is input from the air inlet of the oxygen sensor to conduct secondary water wash on the three-way catalyst which is washed with the cleaning liquid. By the utilization of the cleaning liquid and the combination of water and the cleaning liquid input from the air inlet of the oxygen sensor, the three-way catalyst can be cleaned, and the cleaning effect is good.

Description

technical field [0001] The invention relates to the cleaning field of three-way catalytic converters, in particular to a disassembly-free cleaning method for three-way catalytic converters. Background technique [0002] The three-way catalytic converter is the most important external purification device installed in the automobile exhaust system. It converts harmful gases such as CO, HC and NOx emitted from automobile exhaust into harmless carbon dioxide, water and nitrogen through redox. [0003] Because fuel contains harmful substances such as sulfur and phosphorus, chemical complexes will be formed inside the three-way catalytic converter after combustion, and the engine is often in an incomplete combustion state, and carbonates with calcium and magnesium ions will be formed in the three-way catalytic converter. These reasons are likely to cause three-way catalytic converter poisoning failure, blockage and other failures. After the three-way catalytic converter is blocked...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B77/04
Inventor 陈凤鸣包向前陈淑萍
Owner 陈凤鸣
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