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Sharma, Prashant
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Technology to Achieve Engine Efficacy: Optimized Intake System

FEV India Pvt, Ltd.-Prashant Sharma, Aditya Pratap Singh, Vijay Sharma, Vivek Rai
Published 2019-01-09 by SAE International in United States
In the era of sustainable engines where the need of high power, torque, engine life is increasing while eliminating BSFC and emission concerns, the variable length intake manifold system helps to provide optimized intake system. The research consists of adopting continuous variable length intake manifold on diesel engines where compression and suction waves provide better swirl and pressurization methodology. The continuous varying intake manifold helps to provide better volumetric efficiency by more than 100% as constructive waves provide improved swirling which leads to reducing detonation and better combustion. The manifold path changes with every range of rpm through operating butterfly valve, which also guides air intake path according to engine load. The air flow is increased at low rpm bypassing the intake air from the long and narrow path to increase low-speed torque. The top end power is increased at high rpm by passing intake air through short and long paths which supplies the great amount of air without any restriction. The variable length intake manifold reduces emission in the diesel engine as it provides…
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Technology to Achieve Engine Efficacy: Friction Reduction

FEV India Pvt. Ltd.-Aditya Pratap Singh, Diwanshu Wadhwani, Prashant Sharma, Vivek Rai, Vijay Sharma
Published 2018-04-03 by SAE International in United States
The engine efficacies require the blend of friction reduction approach for optimising the attained output. The research elucidates the scope of friction reduction mechanism to increase engine power and life. The engine components piston and piston rings are coated with the unique composite of graphite, molybdenum disulfide, tantalum layer to reduce friction and wear. The coating on piston minimizes direct contact between piston and cylinder liner, which reduces friction, BSFC and lead to better thermal stability, and engine life. The research also focuses on friction reduction of camshaft bearing by replacing sliding contact bearing with low friction roller bearing. The friction between engine components reduces output power, and the engine oil temperature plays a significant role in it. The research empowers zirconium dioxide coating on oil sump in order to reduce the temperature decay rate so that the optimized engine oil temperature of 100 °C can be retained for longer time. The cars because of traffic gets on and off sporadically, where engine oil temperature role become more prominent, as optimised temperature reduces the problems caused…
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Evaluation of Performance of DPF Cell Structure for Soot Loading, Regeneration and Pressure Drop Using CFD Simulation

Mahindra & Mahindra, Ltd.-MY Raghu, Prashant Sharma
Published 2017-01-10 by SAE International in United States
In recent times diesel powered vehicles are becoming popular due to improved performance and reduced exhaust emission with this the market share of diesel passenger cars expected to approach 60 % over the next few years. In compliance with future emission standards for diesel powered vehicles, it is required to use diesel particulate filters (DPF) along with other exhaust emission control devices. There is a need for more optimized DPF cell structure to collect maximum soot load with low pressure drop and improved exhaust performance from diesel vehicles in Indian driving conditions.In this thesis paper a detailed parametric study have been carried out on different DPF cell structures like Square, Hexagonal and combined cell geometry. The performances of different cell structure has been evaluated for maximum soot loading capacity and regeneration rate, pressure drop, temperature distribution across cell structure. Experimental study on four cylinder diesel engine has been carried out on a test bed under standard driving cycle for base line cell structure to get soot load and pressure drop characteristics. A steady state CFD…
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