Washing device for three-way catalytic converter and inlet channel of automobile and control method

Abstract

The invention relates to a washing device for a three-way catalytic converter and an inlet channel of an automobile and a control method. The device comprises a washing agent input pipeline and a washing agent flow control circuit, wherein one end of the pipeline is connected with a washing agent tank, the other end of the pipeline is provided with a vacuum pipeline interface of an engine, and the inside of the pipeline is orderly connected with a vacuum pressure sensor and an electromagnetic flow controller respectively; the circuit is provided with a vacuum pressure measurement interface and an electromagnetic flow control interface; and an interval of a maximum pressure value and a minimum pressure value of vacuum pressure is preset, the electromagnetic flow controller is in a state that the opening flow is 13.5g+ / -0.5g / m in the interval, otherwise, the electromagnetic flow controller is in a shutoff state. The device and the method have the advantages that the device and the method can realize the automatic closed-loop control of the inflow amount of a washing agent and the vacuum pressure; the device and the method ensure the washing quality of the three-way catalytic converter and the inlet channel of the engine and avoid the major breakdowns of piston seizure and cylinder plugging of the engine; and the device has a simple structure and extremely convenient operation.

Description

Technical field [0001] The invention relates to automobile maintenance and repair equipment, in particular to an automobile three-way catalytic converter and air inlet cleaning device and control method. Background technique [0002] People are paying more and more attention to the pollution problem of automobile engines, and new and higher standards have been introduced time and time again. In order to eliminate automobile pollution, people have added three-way catalysts to automobiles. However, with the operation of automobiles, the sulfur contained in gasoline, Phosphorus, zinc, and manganese will still form a layer of sulfur, phosphorus, zinc, and manganese chemical complexes on the surface of the catalytic converter, which will reduce the function of the three-way catalytic converter. Therefore, once the exhaust gas of the automobile is unqualified, the three-way catalytic converter and the automobile The intake duct is cleaned. The so-called cleaning is to add a special cl...

AI Technical Summary

Problems solved by technology

[0002] People are paying more and more attention to the pollution of automobile engines, and new higher standards have been introduced time and time again. In order to eliminate the pollution of automobiles, people have added three-way catalytic converters to automobiles. However, with the operation of automobiles, the sulfur, Phosphorus, zinc, and manganese will still form a layer of sulfur, phosphorus, zinc, and manganese chemical complexes on the surface of the catalyst, which will reduce the function of the three-way catalyst. Air intake cleaning

The so-called cleaning is to add a special cleaning agent from the intake port during the operation of the engine. At present, people pay attention to improving the quality and effect of the special cleaning agent during cleaning, while ignoring the control of the amount of cleaning agent added. With continuous improvement, the control of the amount of cleaning agent added has changed from the extensive and traditional method of only installing a needle valve on the connecting pipe to the use of precision flow meter monitoring during the process of adding cleaning agent, but the flow control is still It is controlled by a manual knob, and the amount of cleaning agent added will change with the engine speed, but manual control cannot follow at all, so that the current cleaning agent is added entirely by human experience, and a little carelessness will cause cylinder holding and blockage Major accidents, the accident rate depends entirely on the individual, which makes it difficult to control the cleaning quality of the three-way catalytic converter and the intake passage of the engine, which brings great inconvenience to the cleaning work

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