Hybrid Vehicle (HV) Engine Vibration Sources Detection And Identification Using Time-Frequency Analysis

Harun, Nurfarahani (2016) Hybrid Vehicle (HV) Engine Vibration Sources Detection And Identification Using Time-Frequency Analysis. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In automobile industry, the vibrations generated in the internal combustion engine affects the performance of the vehicle and quality comfort while ride the vehicle. Each mechanical component in a vehicle will produced a motion or a vibration when the vehicle started to run. The objective of this study is to measure the signal vibration from the engine and analyse it by using Matlab software. The other purpose of this study is to perform the hybrid engine condition monitoring by using the accelerometer. The aim goal of this study is to compare the change of the signal vibration on different location while at various speed. In this study, the accelerometer was used to measure the vibration signal of the Toyota Prius hybrid engine. The vibration were measured in the condition of the car in stationary with different engine speed. The engine speed were at idle which is 1000 rpm and then were revved until 1500 rpm and 2500 rpm. The accelerometer were mounted in line at the four cylinder of the engine. Then the signal were subjected to condition monitoring operation by using filtering. The vibration signal graph result of the four channel which represent the four cylinder in the combustion engine were analysed by using Matlab software including Fast Fourier Transform. The coding done including the coding for filtering and transformation of the signal from time domain to frequency domain. The overall results indicated that the peak of the graph which is maximum acceleration amplitude increase with the increasing of engine speed.

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