The stringent demands on reducing CO2 emissions mean that fleet consumption in Europe must be limited to 95 g CO2/km for an average vehicle weight of 1395 kg by 2020. In addition to electrifying drive systems, much more must be done to improve the efficiency of the combustion engine. As the gasoline engine will continue to account for the largest share of the world market, particular importance must be attached to this propulsion concept.
For gasoline engines to meet this ambitious CO2 goal, one main development trend is seen in reducing displacement in combination with supercharging (downsizing). Charge dilution with and without supercharging would open up further thermodynamic potential but for that the ignition limit must be shifted at high in-cylinder pressure. As a result, Improving ignition reliability and precision – with much leaner mixture quality and exhaust-gas recirculation rates – may be the key to further optimizing the gasoline engine. Outside the spark-plug ignition range, however, igniting such a highly diluted mixture poses a challenge.
Must the traditional spark plug be replaced by alternative systems, as current research projects suggest?
Demands on Gasoline Engines with Focus on the stringent Fuel Economy and Emission Limits until 2020 – Ignition System Requirements for Future Combustion Systems – Effect of Ignition System on Combustion ?Quo vadis ignition – Evolution or Revolution – A study from the thermodynamic perspective – The High Frequency Ignition System EcoFlash – Possibility of the new ignition system using the low temperature plasma having dual functions of strengthening ignition for SI combustion and promoting and controlling autoignition of HCCI combustion – Alternative Ignition System based on Microwave Plasma – Optimizing the Spark Position While Allowing for the Effect of In-Cylinder Flow – A High-Energy Continuous Discharge Ignition System for Dilute Engine Applications – Optical Combustion Analysis with Spark Plug Sensors for Particulate-optimized EU6 Calibration – Optical Engine Indication: in-cylinder AFR, EGR and temperature transients - The Use of Measuring Spark Plugs for Engine Indicating: Possibilities and Limits – The Inductive Ignition with Auxiliary Sensory Functions: Limitations and Opportunities – Functional Aspects of conventional Spark Ignition for internal Combustion Engines – Simulation as Integral Part in the Product Development Process of Ignition Coils – Innovative Ignition Systems for Highly-Supercharged Downsized Engines – Design Criteria for the Use of Corona Ignition Systems in Combustion Engines – Comparison of the thermodynamic potential of alternative ignition systems for SI-engines
This book is intended for engineers involved in developing today?s and tomorrow?s gasoline engines at automobile manufacturers, component suppliers, research institutes and universities with a focus on optimizing thermodynamics, combustion and mixture formation as well as on developing ignition systems and components or engine control units.