By H. Zhao
Direct injection permits certain regulate of the fuel/air combination in order that engines could be tuned for superior energy and gasoline economic climate. This has to be balanced opposed to elevated gear charges and emissions, providing ongoing learn demanding situations in bettering the know-how for advertisement functions. this significant publication experiences the technological know-how and expertise of alternative forms of DI combustion engines and their fuels. 5 major sections offer an outline of the state-of-the-art, overlaying fuel DI engines; either light-duty and heavy-duty DI diesel engines; substitute fuels and aftertreatment units; and complicated modeling and experimental options.
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Additional resources for Advanced Direct Injection Combustion Engine Technologies and Development: Gasoline and Gas Engines, Volume 1
The exhaust aftertreatment is performed by a selective, continuously operating reduction catalytic converter with an iridium coating. This catalytic converter has been combined with a conventional three-way catalytic converter to form what is referred to as a tandem catalytic converter. Owing to its low thermal resistance, this catalytic converter is mounted on the underbody. However, a NOx conversion rate of only 60% is achieved using a catalytic converter that operates according to this principle.
Fuel is deposited on cylinder walls and the piston. A pronounced film may form on the wall, not only during cold starts and when the engine is warming up, but also during normal engine operation. Incomplete combustion causes soot formation and deposits at these locations. Deposits that accumulate cannot be fully burned off because of the low combustion temperatures encountered during partial load operation. These porous residues absorb fuel that is sprayed onto them during subsequent injection.
Gasoline direct injection with turbocharging is an ideal combination for Stratified-charge combustion in DI gasoline engines 43 increasing the efficiency of the engines. Several manufacturers have already combined homogeneously operated engines with forced induction and direct injection and have also created attractive downsizing concepts. These kinds of engines offer good road performance comparable with engines with higher displacements and achieve favourable fuel consumption. The CO2 emissions of modern engines with gasoline direct injection or a downsizing concept already compare favourably with diesel engines.
Advanced Direct Injection Combustion Engine Technologies and Development: Gasoline and Gas Engines, Volume 1 by H. Zhao