TIME AND FREQUENCY ANALYSISOF THE ENGINE SUPPORT VIBRATION WITH HYDROGEN-DIESEL DUAL-FUELING

Abstract

Hydrogen-diesel dual fuelis used as alternative energy in a dieselengine for saving diesel fuel and protecting the environment. Hydrogen is sustainable, renewable, and carbon-free. It can be produced from various procedures. Hydrogen addition affects engine vibration and car seat vibration. This article presents the effect of hydrogen flow rate on root mean square value and spectrum of the vibration of the engine support. The four-stroke single-cylinder diesel engine is tested with hydrogen-diesel dual fuel by varying hydrogen flow rate. The vibration of the engine support is measured at two constant speeds with three different loads. The root means square and the fast Fourier transform of the engine support vibration are calculated to analyze the vibration signals. The results of the root mean square of the total acceleration show that the root means square value of the engine support vibrations tends to increase by adding the hydrogen flow rate.  The fast Fourier transform spectrums in the experimental results show that the average peak acceleration of the first three engine frequencies around 0 to 70 Hz tends to decrease by adding the hydrogen flow rate. The car seat resonance vibration at this frequency range can be reduced by adding the hydrogen flowrate.