Abstract
Noise is a very important phenomena for passenger comfort in a vehicle. Engine of the vehicles produce disturbing noises in different frequencies. In the application of acoustic, there are different filters to predict the sound pressure level and disturbing noises. The aim of the present study is to investigate the noise characteristic of a compression ignition engine at different weighting filters. In the experiments, the engine was fuelled with low sulphur diesel and sunflower biodiesel fuels and it run at different engine speeds ranging from 1200 to 2400 rpm, with steps of 300 rpm. The results indicated that noise characteristic of compression engine with engine speed shows different trends at A- weighting filter than C- and Z- weighting filters especially at 1500 rpm. Moreover, in the study, it was cleared that the SPL decrease with the addition of biodiesel fuel regardless of its ratio.
Highlights
Noise generation of internal combustion engine is a highly complex phenomena
A- weighting filtered sound pressure level (SPL) is generally assessed in terms of road-traffic noise since A- weighting is similar to perceived loudness by human ear at 40 dB
In the study of Patel et al (2019), a genset engine was used for investigation of noise generation of the engine when it was fuelled with soybean and rapeseed biodiesels [3]
Summary
Noise generation of internal combustion engine is a highly complex phenomena. In a vehicle, engine, powertrain, tyre road interaction, and aerodynamic are the main sources of the noise generation [1]. A- weighting filtered sound pressure level (SPL) is generally assessed in terms of road-traffic noise since A- weighting is similar to perceived loudness by human ear at 40 dB. Noise emission of vehicles and engines are generally evaluated with dB(A). In the study of Patel et al (2019), a genset engine was used for investigation of noise generation of the engine when it was fuelled with soybean and rapeseed biodiesels [3]. Hoffmann and Kroop (2019) were studied for the combine model of tyre/road noise [6] They achieved that the auralization tool delivers pass by sounds that are perceived in a very similar as recordings except a small range. In this study noise generation of a compression ignition engine was investigated by using various filtering. The engine was operated at different speed while it was fuelled with diesel and sunflower biodiesel fuels
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
