We address the control of the airpath of a turbocharged S.I. engine equipped with Variable Valve Timing actuators (VVT). Compared to standard configurations, the engine does not possess any external EGR (Exhaust Gas Recirculation) loop. Rather, VVT are used to produce internal EGR, providing similar beneficial effects in terms of emissions reduction. The airpath dynamics takes the form of a sin...

Stringent CAFÉ regulations along with technological advances in materials, high-pressure fuel injection and complex turbo charging systems have rekindled interest in the area of Diesel engines for passenger vehicle applications. A modern Diesel engine is not only clean and quiet but also allows comparable drivability relative to gasoline engines with considerable improvements in fuel economy. H...

–Fast depletion of fossil fuels demands an urgent need to carryout research to find viable alternative fuels such as Hydrogen, LPG and CNG. The gaseous hydrocarbons seem to be best immediate option presently available[1]. The remarkable feature of gaseous fuels are the absence of mineral impurities, the consistency in quality and the convenience and efficient in use. LPG is used widely as a co-...

Nowadays, increasingly stricter regulations on emission reduction are inducing rapid developments in combustion science. Low-temperature (LTC) is an advanced technology that increases engine’s thermal efficiency and even provides low emissions of nitrogen oxides (NOx) particulate matter (PM). The often uses early direct injections to achieve sufficient mixture homogeneity. This leads increasing...

Due to stricter emission legislation, there is a need for more efficient control of diesel engines with exhaust gas recirculation(EGR). In particular, it is important to estimate the air/fuel ratio accurately in transients. Therefore a new engine gas flow model has been developed. This model divides the gas into one part for oxygen and one part for inert gases. Based on this model an observer h...

The current research work on the effect of exhaust gas recirculation diesel engine for analysis performance and emission characteristics with corn oil methyl ester blends. was tested three fuels are 100diesel, 20B (20%COME + 80% Diesel) 40B (40%COME 60% EGR condition 0% 20% rate. evaluated such as thermal efficiency, brake specific fuel consumption, temperature emissions carbon dioxide, hydroca...

Biodiesel as a clean energy source could reduce environmental pollution compared to fossil fuel, so it is becoming increasingly important. In this study, we investigated the effects of different pilot injection timings from before top dead center (BTDC) and exhaust gas recirculation (EGR) on combustion, engine performance, and exhaust emission characteristics in a common rail diesel engine fuel...

Exhaust gas recirculation (EGR) is one of the main techniques to enable use oxyfuel combustion for carbon capture and storage (CCS). However, recirculated streams with elevated dioxide poses different challenges. Thus, more research required about cumulative effects on desirable outcomes processes such as thermal efficiency, reduced emissions system operability, when fuels high CO2 concentratio...

Abstract: Reduction of NOX emissions and fuel consumption are the main topics in engine development, forcing the adoption of complex techniques and components, whose interactions have to be clearly understood for proper and reliable operations and management of the whole system. The investigation presented in this paper aimed at the development of integrated control strategies of turbocharging,...

This paper reports the results of an experimental investigation on the effect of the EGR on the pollutants emission, especially on oxides of nitrogen, from the exhaust gases and performance of the spark ignition engine. Also along with experimental work, a mathematical model for the determination of the effect of EGR on the peak cycle temperature and for the prediction of its effect on the NOx ...