By H. Zhao
Direct injection allows particular regulate of the fuel/air blend in order that engines might be tuned for more advantageous strength and gas financial system. This has to be balanced opposed to elevated apparatus expenses and emissions, featuring ongoing learn demanding situations in bettering the expertise for advertisement functions. this significant e-book experiences the technology and expertise of other forms of DI combustion engines and their fuels. 5 major sections supply an outline of the state-of-the-art, overlaying fuel DI engines; either light-duty and heavy-duty DI diesel engines; replacement fuels and aftertreatment units; and complicated modeling and experimental innovations.
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Additional info for Advanced Direct Injection Combustion Engine Technologies and Development: Gasoline and Gas Engines, Volume 1
Whilst the higher HC and CO emissions of stratified charge operation with direct injection can be accommodated by a more effective three-way catalyst, an additional aftertreatment system must be employed to reduce the level of exhaust NOx emission to meet the current emission legislation. In fact, the successful market penetration of DI gasoline engines with stratified charge lean-burn operation is strongly dependent on the cost-effective leanNOx aftertreatment technologies. It is not possible to meet the scheduled emission legislations without such devices.
The intake port wall film that forms and enriches the mixture during rapid load shifts with port fuel injection is eliminated. In addition, gasoline direct injection also presents the opportunity of using special operating modes, such as stratified starting or homogeneous lean-burn operation mode. Comparison of nozzle types The three standard types of nozzles used nowadays in fuel injectors for gasoline direct injection are shown in Fig. 6. The nozzles can be differentiated 30 Advanced direct injection CET and development from one another by the means by which they open and close.
Two-figure reductions in fuel consumption can be achieved in large sections of the engine operating map. Compared to versions with port fuel injection, engines with gasoline direct injection in the New European Driving Cycle achieve a 10% reduction in fuel consumption. Furthermore, the power output of this engine is 15 kW higher and the torque is 15 Nm higher than for the V6 port-injected gasoline engine. Technical data for Mercedes-Benz CLS 350 CGI Cylinder layout/number: Included cylinder-bank angle: Stroke ¥ bore: Stroke–bore ratio Engine displacement: Valves per cylinder: Compression ratio: Power: Torque: Spec.
Advanced Direct Injection Combustion Engine Technologies and Development: Gasoline and Gas Engines, Volume 1 by H. Zhao