Backpressure regulating device of single-cylinder engine

Abstract

The invention relates to a backpressure regulating device of a single-cylinder engine. The backpressure regulating device of the single-cylinder engine comprises a straight cylinder type throttling pipe (1), a secondary butterfly valve (2), a tapered throttling pipe (9), a primary butterfly valve (8), a limiting screw (10) and a regulation locking device, wherein the two sides of the straight cylinder type throttling pipe (1) are connected with an exhaust passage and the tapered throttling pipe (9) respectively, and the tapered throttling pipe (9) is connected with an exhaust pipe. According to the backpressure regulating device of the single-cylinder engine, flexible regulation of exhaust backpressure of the testing engine can be achieved, the backpressure regulating device has the advantages that both machining and installation are convenient and breakdowns can be handled conveniently, a user just needs to rotate a driving screw to adjust the opening degrees of the secondary butterfly valve (2) and the primary butterfly valve (8) and then lock the secondary butterfly valve (2) and the primary butterfly valve (8) so that different backpressure requirements during engine performance testing can be met, complicated adjustment of the exhaust pipe is not needed any more, and time cost and economic cost required during performance research and development of the testing engine are reduced.

Description

technical field [0001] The invention belongs to the technical field of engine testing, and in particular relates to a back pressure regulating device for single-cylinder engine testing. Background technique [0002] The single-cylinder engine plays a very important role in the engine development process. It provides a test platform and information support for the combustion process of special projects in advance of basic research and mass production, and provides a combustion system matching scheme that meets the performance index requirements for the subsequent development of the complete machine. . Due to the particularity of the single-cylinder engine and the whole machine structure and test conditions, it is difficult for the single-cylinder engine to be completely consistent with the performance of the whole machine, especially in the intake and exhaust systems. In order to more realistically simulate the whole machine The exhaust resistance generated by the supercharg...

AI Technical Summary

Problems solved by technology

However, the exhaust back pressure adjustment device disclosed in the above-mentioned prior art has the technical problems of slow adjustment of the exhaust back pressure and difficulty in precise control of the exhaust back pressure.

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