Engine exhaust parameter detecting device for matching muffler with engine

Abstract

The invention relates to an engine exhaust parameter detecting device for matching a muffler with an engine, which belongs to the technical field of noise control in an automobile exhaust system. The detecting device comprises a measuring tube and an acoustic load variation tube, wherein the measuring tube is connected with an engine exhaust manifold, and the other end of the measuring tube is connected with an inner tube of the acoustic load variation tube. A dynamic pressure sensor mounting seat, a static pressure sensor mounting seat and a thermocouple mounting seat are arranged on the measuring tube, the acoustic load variation tube consists of the inner tube and an outer tube, the inner tube extends into the outer tube, and a limiting clamp ring and a high-temperature sealing ring are arranged on each of the inner tube and the outer tube. By the aid of the detecting device, fluid parameters such as temperature, static pressure, dynamic pressure and flow velocity and acoustic parameters such as source impedance, source strength parameters and the like of an engine exhaust system and can be quickly measured, so that theory basis is provided for simulation and matching design of an automobile exhaust and muffling system.

Description

[0001] The invention relates to an engine exhaust parameter detection device for matching a muffler with an engine, and belongs to the technical field of noise control of automobile exhaust systems. Background technique [0002] Automobile exhaust noise is one of the main noise sources of automobiles. To effectively reduce exhaust noise, it is necessary to combine the exhaust muffler system with the engine system for matching. First, exact engine exhaust system parameters need to be obtained. At present, the methods for matching the exhaust muffler system with the engine mainly include the bench test method (Zheng Kanghua, Design and test of the exhaust muffler pit of the engine bench test system, Journal of Southwest Forestry University, 1989) and the method based on simulation (Xie Tianfeng , Application of GT-POWER in Design of Internal Combustion Engine Exhaust Muffler, 2003). The bench test method is to install a specific engine on the engine dynamometer test bench, con...

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Problems solved by technology

However, the accuracy of this method depends on detailed engine design parameters, which are not easy or even impossible to obtain in actual work, so this method is difficult to be successfully applied in actual work

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