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Potencial of a Low Cost Fuel Economy Concept
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Sector:
Event:
1995 SAE Brasil
Language:
English
Abstract
Amongst keeping the stringent exhaust emission standards, the significant reduction of fuel consumption is dominating future engine development. In order to influence the fleet consumption significantly, especially inexpensive concepts applied to mass production are required.
Considering SI engines, one of the main issues is the reduction of pumping and heat losses during part load operation. This can be achieved on the one hand by shifting the engine main operation range to higher loads and lower speeds during city cycle driving due to long final gear ratios. In order to meet the vehicle acceleration demands simultaneously, a low end torque orientated full load characteristic is indispensible. On the other hand, the traditional way of downsizing combined with higher speeds under city driving conditions offers also potential for improving fuel economy.
Based on flow tests, engine investigations and cycle calculations, the potential of an inexpensive fuel economy concept will be demonstrated and evaluated in comparison to a conventional downsizing concept.
Authors
Topic
Citation
Neuber, J. and Baumgarten, H., "Potencial of a Low Cost Fuel Economy Concept," SAE Technical Paper 952255, 1995, https://doi.org/10.4271/952255.Also In
References
- Endres, H. Neußer, H.-J. Geiger, J. Reduction of HC-Emissions by Optimization of the Local Flame Propagation on Multi-Valve SI-Engines SIA-Congress Nov. 15 16 1994 Paris
- Fahl, E. Haas, A. Potential for Friction Reduction on Passenger Car Engines SIA-Congress Nov. 15 16 1994 Paris
- Neußer, H.-J. Endres, H. Wurms, R. Influence of Swirl and Tumble on Economy and Emissions of Multi-Valve Spark Ignition Engines SAE-paper 920516