Abstract
The noise characteristic of an entire single-cylinder gasoline engine was tested through acoustic spectral and intensity analyses to solve its abnormal noise problem in idling condition. Then, the ...
Highlights
The abnormal noise problem of an engine seriously affects the subjective feeling of comfort of passengers
The optimized design presents the lowest peak power in lateral force (LF), friction power, and secondary kinetic energy (SKE) compared with the original design, which proves that the optimized design exerts an obvious improvement effect on the noise problem caused by piston secondary motion
The orthogonal array method is used to analyze the piston structure parameters and to select the factors that exert a significant influence on the piston dynamic performance to solve the abnormal noise problem, reduce the piston’s LF, SKE, and friction power loss (FPL), and obtain the optimized designed
Summary
The abnormal noise problem of an engine seriously affects the subjective feeling of comfort of passengers. As the main moving part of the engine, the piston possesses numerous contact surfaces and complicated running environments. Frictions and impacts, which seriously affect the vibro-acoustic characteristics of the engine, can be generated. The piston becomes an important optimization objective and can control the noise, vibration and harshness (NVH) performance of the engine. Studies of piston dynamic performance have already been conducted to optimize engine NVH performance control.
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