The paper investigates improvements in the turbocharged diesel engine transient response that can be attained when a turbocharger power assist system, consisting, for example, of an electric motor and a battery, is coupled to the turbocharger shaft. The method of investigation relies on formulating and solving numerically an appropriate minimum time optimal control problem. Comparison with a co...

The global policy solution seeks to reduce the usage of fossil fuels and greenhouse gas (GHG) emissions, biogas (BG) represents a solutions these problems. use could help cope with increased amounts waste fuels. Biogas be used in compressed natural (CNG) engines, but engine electronic control unit (ECU) needs modified. In this research, spark ignition (SI) was tested for mixtures hydrogen (volu...

Application of Compressed Natural Gas (CNG) in diesel engines has always been important, especially in the field of automotive engineering. This is due to easy accessibility, better mixing quality and good combustion characteristics of the CNG fuel. In this study the application of CNG fuel along with diesel oil in a heavy duty direct-injection automotive diesel engine is experimentally investi...

Road transportation has received the attention of researchers due to its higher carbon footprint. Alternative fuels present major advantages in terms environmental sustainability. For this reason, an enviro-economic analysis alternative carries great significance. However, scarce attempts have been rendered order ascertain impact a hydroxy gas (HHO) and compressed natural (CNG) mixture on susta...

After-treatment technologies are adopted in automobiles and ships to meet strict emission regulations, which increase exhaust back pressure. Furthermore, underwater exhaust systems are employed on board ships to save space, and reduce noise and pollution on working decks. However, water at exhaust outlet creates a flow resistance for the exhaust gases, which adds to the back pressure. High back...

the first step in dealing with the behavior of an engine on ng mode is the installation of a suitable gas fueling system on the engine. two generations of gas fueling systems which were studied and installed on research engine were mixer type and sequential system type. the results, including performance, emissions and fuel consumption, were recorded and analyzed. the results showed that the se...

In a turbocharged engine, preserving the maximum amount of exhaust pulse energy for turbine operation will result in improved low end torque and engine transient response. However, the exhaust flow entering the turbine is highly unsteady, and the presence of the turbine as a restriction in the exhaust flow results in a higher pressure at the cylinder exhaust ports and consequently poor scavengi...

ABSTRACT The present work shows developments made in air management control in a turbocharged diesel engine. The platform enables non-destructive testing on a virtual engine that closely resembles a real engine. A virtual engine is more than just an experimentally adjusted non-linear model – it also handles sensor and actuator problems (dynamic nonlinearities such as hysteresis, measurement noi...

Experimental investigations carried out on a single-cylinder four-stroke motorcycle spark ignition engine operating on gasoline and natural gas are reported in the present paper when compressed natural gas (CNG) and hydrogen were used as fuel. The investigations were carried out by mixing a small percentage of hydrogen (5 to 30%) with CNG and supplied to the engine. Hydrogen and CNG were mixed ...