A Study Of The Feasibility Of Reducing Snowmobile Noise

Author : David Kuyek
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (973 download)

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Download or read book Exploration of Snowmobile Noise written by David Kuyek and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Snowmobile noise is a major issue affecting the perception and regulation of the snowmobile industry and community. Snowmobile producers and original equipment manufacturers have invested in the design, testing and implementation of noise reducing technologies. Other groups have studied snowmobile noise and its effects to expand the understanding of this subject.Electric vehicles (EVs) are slowly becoming more popular in the automotive space. Along with the rise of EV automobiles, some groups have successfully added electric powertrains to other traditionally internal combustion (IC) engine propelled vehicles including snowmobiles. An example of this type of vehicle modification is an EV snowmobile built for utility purposes at a glacial arctic research station.For many IC vehicles , the IC components (the engine, intake and exhaust for example) represent a significant source of noise. A number of researchers have studied the acoustic differences between IC and EV or hybrid EV automobiles and have found EVs significantly quieter than IC automobiles in a number of scenarios. To date, this research has not yet extended to off road electric vehicles. This thesis examines the potential noise-related benefits of electrification of the snowmobile powertrain by comparing a converted EV snowmobile with the IC snowmobile model it was converted from. Testing was done using a variation of the constant speed snowmobile pass-by noise measurement standard (SAE J1161). Additionally, this thesis aims to consider the effect of ground hardness on this standard based on previous research on the subject. To accomplish this goal, these vehicles were tested on both hard and soft snow types. This thesis also examines reductions in snowmobile noise over the past decade. The most popular snowmobile of 2003 in Quebec and the most popular snowmobile of the 2014-2015 winter season were tested concurrently using the SAE J1161 standard and a full throttle pass-by noise measurement standard (SAE J192).Testing on these vehicles demonstrated that the EV snowmobile was quieter than the IC snowmobile by close to 7 dB on soft snow but that this number reduced on harder snow types. In testing of the most popular snowmobiles of 2003 and winter 2014-2015, the newer snowmobile was considerably quieter than the older snowmobile (greater than 10 dB quieter) for both full speed and constant speed acceleration tests though the vehicles were only tested on soft snow. Although the results obtained with the EV snowmobile were not remarkable compared to the old versus new comparison, further testing is required to fully understand the possibilities of an EV snowmobile." --