Economic (fuel price), political (energetic independence), health (cancerous pollutants) and environmental (green house effect) concerns have greatly contributed to the evolution of pollutant emission regulations and fuel consumption regulations in the last decade. A better understanding of the combustion process for operating conditions near the stability limit will probably be the next step t...

The methods of finite-time thermodynamics are used to find the optimal time path of an Otto cycle with friction and heat leakage. Optimality is defined by maximization of the work per cycle; the system is constrained to operate at a fixed frequency, so the maximum power is obtained. The result is an improvement of about 10% in the effectiveness (second-law efficiency) of a conventional near-sin...

Diesel engine combustion chamber which reduces exhaust emission has been designed using CFD analysis and optimization techniques. In order to save computational time for design, the Kriging model, one of the response surface models, is adopted here. For the robust exploration, both the estimated function value of the model and its uncertainty are considered at the same time. In the present prob...

A newly developed heavy duty diesel engine in dual fuel mode of operation has been studied in detail. The main fuel would be natural gas and diesel oil as pilot injection. The importance and effects of mixture preparation and formation through ports, valves and in cylinder flow field with different swirl ratio and tumble on diesel combustion phenomena is an accepted feature which has been studi...

Substitution of a metallic diaphragm for the power piston of a Stirling engine is shown to be a promising approach to transmitting power for a heat-actuated heat pump through a hermetic seal. Hydraulic fluid under high pressure transfers the power from the diaphragu to the compressor plunger, which is balanced by a counterweight. The discussion is divided into three parts which deal with the in...

A piston-rings-cylinder (PRC) assembly determines the blowby, engine oil consumption, and friction wear processes accompanying system's operation. Thus, it is crucial for whole IC efficiency lifetime. lot of research effort put into increasing performance this complex highly dynamic system. Advanced, comprehensive models play an important role in understanding improving PRC In presented work, e...