Function repair liquid for oxygen sensor and three-way catalyst and preparation method and use method

Abstract

The invention relates to the field of automobile component part repair liquids, in particular to a function repair liquid and a repair powder for an oxygen sensor and a three-way catalyst. The repair liquid comprises the following raw materials in parts by weight: 10 to 30 parts of weak acid or weak alkaline, 2 to 5 parts of inorganic bentonite, 2 to 5 parts of nanometer negative ion powder, and 60 to 86 parts of water. The function repair liquid has the advantages that the function repair liquid can enter the interior of deposited carbon, the deposited carbon structure can be loosened, and the oxide particles attached to the surface of the catalyst can be eroded; the problems of carbon deposition and heavy metal poisoning of the three-way catalyst and the oxygen sensor can be effectively solved, and the corrosion function on platinum, rhodium and palladium metals is little; the emission of tail gas can reach the national standard after the function repair liquid is used. The invention also provides a preparation method and a use method of the function repair liquid, and the function of the function repair liquid can be further improved.

Description

technical field [0001] The invention relates to the field of auto parts repair fluid, in particular to an oxygen sensor and three-way catalytic converter function repair fluid, a preparation method and a use method. 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 carbon monoxide, hydrocarbons and nitrogen oxides emitted by automobile exhaust into harmless gases through oxidation and reduction. Carbon dioxide, water and nitrogen. [0003] There are two main reasons that affect the catalytic effect of the three-way catalytic converter: 1. Poisoning: the catalyst is very sensitive to elements such as sulfur, lead, phosphorus, and zinc. Sulfur and lead come from gasoline, and phosphorus and zinc come from lubricating oil. Substances and oxide particles formed after they are burned in the engine are easily adsorbed on the surface of ...

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Problems solved by technology

[0003] There are two main reasons that affect the catalytic effect of the three-way catalytic converter: 1. Poisoning: the catalyst is very sensitive to elements such as sulfur, lead, phosphorus, and zinc. Sulfur and lead come from gasoline, and phosphorus and zinc come from lubricating oil. Substances and oxide particles formed after they are burned in the engine are easily adsorbed on the surface of the catalyst, so that the catalyst cannot contact with the exhaust gas, thus losing its catalytic effect, which is the so-called "poisoning" phenomenon

2. Carbon deposition: When the car works at low temperature for a long time, the three-way catalytic converter cannot be started, and the carbon smoke emitted by the engine will adhere to the surface of the catalyst, making it impossible to contact with CO and HC. After a long time, the pores of the carrier will be blocked , affecting its transformation efficiency

The cleaning agent corrodes carbon deposits through acid, and EDTA adsorbs heavy metal elements such as lead and zinc, but the cleaning liquid has insufficient penetration ability, and the cleaning of carbon deposits only depends on the corrosion effect of acid, which will greatly damage the three-way catalytic converter

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