Study ofa 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 ofair entering the combustion chamber.