Internal combustion

Transient combustion control of internal combustion engines

This thesis addresses the problem of combustion control for automotive engines. A method is proposed to complement existing controllers, which use lookup tables based on steady-state operation. During transients, the new control method adjusts fast control variables (ignition or injection time) to compensate for deviations in the cylinder initial conditions from their optimal values due to the ...

Internal Combustion Engines

Ethanol Internal Combustion Engines

Ethanol Internal Combustion Engines HIGHLIGHTS PROCESS AND TECHNOLOGY STATUS – The use of biofuels (e.g. bio-ethanol and biodiesel) in the transport sector can save significant amounts of fossil fuels and greenhouse gas (GHG) emissions. Internal combustion engines (ICEs) can run on bio-ethanol manufactured from biomass or waste through biochemical processes. Agricultural feedstock such as sugar...

LES of spray and combustion in an internal combustion engine

With the ever rising need for better fuel efficiency and lower emissions, the development of better engine technology is essential. Different strategies are being considered to increase engine efficiency, such as direct injection or downsizing. Certain regimes are clearly identified as optimal for certain range of loads. For gasoline engines, the Homogeneous Charge Compression Ignition (HCCI) c...

Limits of Internal Combustion Engines Efficiency

List of old and new concepts of ICE thermodynamic improvements considering realistic limits of both mechanical and thermal stress and pollutant emissions, especially new concepts of combustion (HCCI-like), piston motion control, consequences of downsizing, possibilities of waste heat recovery and heat regeneration. Methods of simulation for conceptual optimization in hierarchy of procedures. Im...