Study of a New Air Intake System for a Single Cylinder, Fuel Injection, 4 stroke Go-Kart engine

This report basically discusses the research done on target of designing a new air intake manifold for a Go-Kart engine. Currently the engine has difficulty in controlling fuel consumption and also emission. The objective of the research is to study a proper new air intake manifold for the conversion of a 200cc single cylinder engine from carburetor to electronic fuel injection. The study concentrates on flow characteristics in the new design of an air intake manifold that can house the electronic fuel injector as well as achieving a considerable output performance. In the content, there is the specification of the K200 engine. The report also tells on the background study conducted on obtaining enough information on the engine’s behavior. A study was done on the influence of the intake manifold geometry on the performance of engine at wide range of RPM. The study was mainly to see the characteristics of air flow to the combustion chamber through an intake manifold. The study involves modeling a real combustion chamber using CATIA V5, 3D meshing and Computational Fluid Dynamics (CFD) modeling. To further strengthen the study, a flow bench experiment was conducted to validate the same condition as in the CFD. The desired results from both tests are the mass flow rate of air at specific point of the air path. Based on the preliminary results, the author proposed a design which utilizes a bell mouth and diffuser shape intake manifold design. The results of the CFD for the new design showed an increase in the mass flow rate of air entering the combustion chamber.