Design improvement and fabrication of airbox for passenger vehicle

An airbox’s purpose is to provide the engine with a constant flow of clean air for combustion. The turbulent flow within the airbox will create a pressure drop resulting a decline in the vehicle’s performance. This project collaborates with an Original Equipment Manufacturer (OEM) to analyze and improve the current passenger vehicle airbox design. Hence, CO2 emissions can be reduced. The paper will focus on passenger type vehicle as it is the highest source of carbon dioxide (CO2) being emitted for road transportation and these pollutant emissions have also caused many health problems on human. This research is performed to reduce the pressure drop and increase the performance of the vehicle. ANSYS Fluent program will be used to carry out Computational Fluid Dynamics (CFD) simulation on the current airbox to study the flow of fluid and analyse pressure loss from the inlet to the outlet. Results obtained will be compared with the chassis dynamometer test experimental data to validify the CFD results. The project will proceed with the design iterations on different shapes and sizes of airbox after ensuring that the CFD results is close to the experimental data. The design iterations will be simulated to prove whether there are improvements. If improvement is shown, the new design will be validated and no prototype is needed to be produced. This will save the OEM cost in producing prototype at the same time. It is expected that the improved airbox design can reduce the pressure drop within it and at the same time, enhance the performance of the passenger vehicle.