Equipment and method for diagnosing engine combustion based on dual-channel ironic current

Abstract

The invention relates to equipment and a method for diagnosing engine combustion based on dual-channel ironic current. The diagnosing equipment comprises a sparking plug and a signal processing unit for receiving working status signals of an engine and further comprises an ironic current probe, an ironic current detection unit, an ironic current post-treatment unit and a micro control unit; the ironic current probe is arranged in the combustion chamber of the engine; the sparking plug is connected with the ironic current detection unit; the signal processing unit is connected with the micro control unit; the sparking plug and the ironic current probe respectively acquire ironic current signals at the positions; the ironic current signals are sequentially subjected to the overlapping treatment of the ironic current detection unit and the processing treatment of the ironic current post-treatment unit; and the micro control unit performs the combustion diagnosis in the combination of the working status signal of the engine and diagnoses the combustion status of the engine. Compared with the prior art, the equipment and the method for diagnosing engine combustion based on the dual-channel ironic current have the advantages of being precise in diagnosis.

Description

technical field [0001] The invention relates to an engine combustion diagnosis technology, in particular to an engine combustion diagnosis device and method based on a dual-channel ion current. Background technique [0002] Energy and the environment are two major problems facing today, how to actively deal with these two problems has become the focus of social attention. As an important consumer of energy and an important polluter of the environment, automobiles have been constantly self-optimizing in terms of economy and emissions under the guidance of new technologies and standards. my country has a large population, but the number of cars per capita is relatively low. In recent years, the automobile manufacturing industry has developed rapidly. It is the country with the greatest potential for the automobile market in the world. It is estimated that the number of cars in my country will reach 130-150 million in 2020. As the power source of a car, the engine is basically...

AI Technical Summary

Problems solved by technology

However, the traditional ion current based on spark plug detection can only reflect the local combustion state near it, which has certain limitations in the application process. Due to the great influence of the flow field in the cylinder, it is not suitable for the complex turbulent combustion in the engine cylinder. In terms of the process, the improvement of its signal stability has become an important problem in the industrialization of this technology

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