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Potential for Emission Reduction and Fuel Economy with Micro & Mild HEV

AVL List GmbH-Franz Murr, Ernst Winklhofer, Michael Weissbaeck, Gerald Teuschl
  • Technical Paper
  • 2019-28-2504
Published 2019-11-21 by SAE International in United States
The development of modern combustion engines (spark ignition as well as compression ignition) for vehicles compliant with future oriented emission legislation (BS6, Euro VI, China 6) has introduced several technologies for improvement of both fuel efficiency as well as low emissions combustion strategies. Some of these technologies as there are high pressure multiple injection systems or sophisticated exhaust gas after treatment system imply substantial increase in test and calibration time as well as equipment cost.With the introduction of 48V systems for hybridization a cost- efficient enhancement and, partially, an even attractive alternative is now available. An overview will be given on current technologies as well as on implemented test procedures. The focus will be on solutions which have potential for the Indian market, i.e. solutions which can be implemented with moderate application effort for currently available compact and medium size cars. The possibilities of 48V technologies for fuel economy and emission reduction will be discussed. Simultaneously, tools for testing and calibration at power train testbed as well as for on-road application will be presented.Furthermore, it…
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Reducing Emissions and Improving Fuel Economy by Optimized Combustion of Alternative Fuels

AVL List GmbH-Franz Murr, Ernst Winklhofer, Hubert Friedl
Published 2011-10-06 by The Automotive Research Association of India in India
Alternative fuels, especially fuels based on biological matter, are gaining more and more attention. Not only as a pure substitute of oil but also in terms of a possibility for further reduction in emission and as an option to improve the global CO2 balance.For improving the engine performance (emissions, fuel consumption, torque and drivability) the adjustment of fuel injection, the fuel evaporation process and the combustion process itself is paramount. In order to exploit the full potential of alternative fuels excellent knowledge of the fuel properties, including the impact on ignition and flame propagation, is required. This needs suitable tools for analysis of the fuel injection and combustion process. These tools have to support the optimization of the combustion system and the dynamic engine calibration for lowest emissions and most efficient use of fuel.As the term “Alternative Fuels” covers a very wide area a brief overview on available fuel types will be made. Also, the main characteristics of the most promising alternative fuels as currently used for propelling mass production cars and in commercial engines…
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