Author : Tejaswini Kumbharde, Shubham Bhadane, Koustubh Deshmukh and Samata Mujumdar

The valve timing is a closely studied process and affects the performance of an IC Engine greatly with respect to the emission, volumetric efficiency and brake power produced. If the valve positions with timing are varied, it results in higher efficiencies and overall performance of the engine is improved. Because of this, various modifications are attempted in valve timing and many variable valve timing systems have been proposed. Nowadays, most modern engines are equipped with variable valve timing. By various case studies, it has been found that there is no single system which simultaneously can control valve lift and timing in an IC Engine. Thus, researchers thought and designed a single system which is capable of both the valve lift and timing independently. A rack and pinion mechanism controlled by a programmed servo motor mounted vertically is most practical in achieving this within the size and space. A single cylinder diesel engine was simulated with a software ‘Lotus Engine Simulation’ to derive the optimum valve angles and lifts for a range of the engine operating speed and the system was accordingly programmed and designed. The system was designed in Autodesk Fusion 360 software and analyzed in ANSYS.

Keywords: The valve timing, Performance of an IC Engine etc.