College of Engineering (COE)
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Browsing College of Engineering (COE) by Subject "Automobiles"
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- PublicationDesign of a shell eco marathon Asia vehicle-prototype using hydrogen fuel cell(2017)Srithayvaan MuniasparanThis thesis is about design an environmentally friendly prototype car that operates efficiently on hydrogen fuel cells. The vehicle is constructed according to 2016 Shell Eco Marathon rules and regulations, where it consist of 3 wheels, light weight build for race purpose. The goals of this project are to achieve a fuel efficient prototype vehicle with small rolling resistance aerodynamics and light in weight. This project is a wide scoped project various of several technical engineering methods such as CAD (computer aided design), CFD (computational fluid dynamics), management skills such as communication and marketing. The prototype is build using aluminum T6061- T6 alloy for the chassis and the body is build using carbon fibre The vehicle comprised of 3 wheels, two piece of 17 inch tyres and a single 18 inch tyre for the rear part. The steering system was built by referring to the Ackerman's principle. CFD analysis is done to the body of the vehicle at 50km/hour speed. The drag coefficient is calculated. The stress and displacement analysis is also included to study the maximum possible damage in case of a coalition.
95 81 - PublicationStudy on the problems of auto transmission gearbox for vehicle(2015)Qamaruzzaman MohammadThis thesis basically reports the problems of automatic transmission gearbox for vehicle. Fundamentally, the study on autonomy and the working principles, investigation on the problems, and to come out with approaches and remedies to overcome the problems of the automatic transmission in ensuring the reliability and durability have become the main purpose of the research. Overhauling processes of the automatic transmissions had been done to ensure the thoroughness of the problems investigation of the automatic transmission which had been conducted and completed in a workshop. The approaches and steps in ensuring the transmission durability and reliability over its lifespan depend on the problems and causes which in most cases the components are needed to be replaced as solutions. In addition, most of the problems had been diagnosed and been identified are caused by lots of factors of the transmission itself and the handling manner of the owner. Hence, the durability and reliability of the auto transmission gearbox do not depend only on the technology it built in, but in the human nature as well.
66 124 - PublicationTo investigate and improvise the performance of local car bumper system(2017)Rashidaran RajasilvamThis thesis is to investigate and improvise the performance of local car bumper system. The composition of current local car bumpers are Polycarbonate (PC) and also Acrylonitrile Butadiene Styrene (ABS). This local car bumpers are not as good as imported bumpers. To improve the mechanical properties of these bumper, EPDM is added into the original compositions which are PC and ABS. This material is chosen because it is a rubbery material and it have the properties to increase the impact strength. Using injection molding process, five specimens were constructed and the first specimen is the original composition of local car bumpers which is Polycarbonate (50 wt.%) and Acrylonitrile Butadiene Styrene (50 wt.%). The second specimen is Acrylonitrile Butadiene Styrene (50 wt.%), Polycarbonate (45 wt.%) and EPDM (5 wt.%). The third specimen is Acrylonitrile Butadiene Styrene (45 wt.%), Polycarbonate (50 wt.%) and EPDM (5 wt.%). The fourth and fifth specimens are the pure Acrylonitrile Butadiene Styrene (100 wt.%) and also Polycarbonate (100 wt.%). These two pure specimens were constructed to find out the grade of the raw material supplied by the supplier separately before the mixing. These specimens underwent two types of testing which are mechanical testing and also morphological testing. For mechanical testing, Charpy Impact Test was done with 25 Joules Charpy force. For morphological testing, Scanning Electron Microscope was conducted. The procedures of these experiments are in chapter iii and the results and discussions are in chapter iv.
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