S.no Author Topic Conclusion Remarks Gap Modeling the The calculations of engine 1 Effect of Variable performance were carried out Timing of the using the simulation and Exhaust Valves analysis engineering on SI Engine software: LOTUS. Sensitivity Emissions for analysis shows that the Greener reduction of 10% of (EVO) angle gave a reduction of around 2.5% in power and volumetric efficiency, also a slight increase in nitrogen oxide (NO) and carbon monoxide (CO), while a 10% decrease in (EVC) causes around 1% improvement in Power. Solenoid The mathematical model of a 2 Operated Variable permanent magnet solenoid Valve Timing in was simulated to determine IC Engines-2008 its current and force characterstics at various fixed air gaps. Curves showing decline in Pumping losses in PV diagrams are plotted and validated from simulation softwares . Determination of The variation of engine 3 optimal valve performance is less affected timing for internal by the exhaust valve timing combustion than the inlet valve timing . engines using parameter estimation method -2011 Rack And Pinion There was found to be an 4 Mechanism for approximately 10% increase Continuous in the volumetric efficiency of Variable Valve the Engine towards both the Timing of IC low and high ends of the Engines-Nov speed spectrum on using the 2014 optimum VVT values at each rpm than the original single value pre-set by the manufacturer as is evident
S.no Author Topic Conclusion Remarks Gap 1 Modeling the Effect of Variable Timing of the Exhaust Valves on SI Engine Emissions for Greener The calculations of engine performance were carried out using the simulation and analysis engineering software: LOTUS. Sensitivity analysis shows that the reduction of 10% of (EVO) angle gave a reduction of around 2.5% in power and volumetric efficiency, also a slight increase in nitrogen oxide (NO) and carbon monoxide (CO), while a 10% decrease in (EVC) causes around 1% improvement in Power. 2 Solenoid Operated Variable Valve Timing in IC Engines-2008 The mathematical model of a permanent magnet solenoid was simulated to determine its current and force characterstics at various fixed air gaps. Curves showing decline in Pumping losses in PV diagrams are plotted and validated from simulation softwares . 3 Determination of optimal valve timing for internal combustion engines using parameter estimation method -2011 The variation of engine performance is less affected by the exhaust valve timing than the inlet valve timing . 4 Rack And Pinion Mechanism for Continuous Variable Valve Timing of IC Engines-Nov 2014 There was found to be an approximately 10% increase in the volumetric efficiency of the Engine towards both the low and high ends of the speed spectrum on using the optimum VVT values at each rpm than the original single value pre-set by the manufacturer as is evident
292026428-Progress-Report-variable-valve-timing-of-si-engine.docx