We propose an estimator of the individual cylinder air fuel ratios in a turbocharged Diesel Engine using as only sensor the single air fuel ratio sensor placed downstream the turbine. The observer consists of a nonlinear filter designed on a physics-based time-varying model for the engine dynamics. Convergence is proven, using a Lyapounov function. Performance is studied through simulations and...

This paper presents the results of experimental work carried out to evaluate the distribution of cold and hot exhaust gas recirculation between cylinders in a DI diesel engine. The experiments have been conducted on a 3.99 liters turbocharged DI diesel engine under full load condition at 1900rpm in order to distinguish and quantify some effects of hot and cooled EGR with various rates on the EG...

Compressed natural gas direct injection (DI-CNG) systems in spark ignition (SI) internal combustion engines have shown that it can give several benefits compared to CNG port fuel systems. However, the DI-CNG injector nozzle head design and jet formation may greatly influence engine exhaust emissions performance. Present experimental study investigated of 7 different designs spray-guided injecto...

<pre><em>The fundamental problem in meeting fuel consumption for the operation of diesel engines is terms costs and ensuring availability fuel. So that idea using alternative fuels other than arises. And recommendation gas (compressed natural gas) several reasons including cheaper prices Indonesia has abundant reserves. Because properties CNG oil are different, it necessary to modif...

Towards a Stronger Simulation Support for Engine Control Design: a Methodological Point of View — Thanks to a specific crank angle degree modelling approach and to an accurate simulator calibration, it is nowadays possible to build a complete simulator which allows the control engineer to access to numerous engine variables, especially non measurable values, and to perform tests over a wide ran...

Compressed biomethane gas (CBG) is an interesting alternative fuel that can be used to solve fossil crisis problems. Nevertheless, it concerned about engine performance and exhaust emission. In additions, CBG produced from agricultural harvesting residues the food industry a good opportunity for utilizing biogas as vehicle fuel. The aims of this research are comparative analysis emission on com...

As is widely known, internal combustion engines are not able to complete the expansion process of gas inside cylinder, causing theoretical energy losses in order 20%. Several systems and methods have been proposed implemented recover unexpanded energy, such as turbocharging, which partially exploits this compress fresh intake charge, or turbo-mechanical turbo-electrical compounding, where amoun...