Abstract
Gasoline engine downsizing has been demonstrated to give significant reductions in vehicle fuel consumption and CO2 emission levels by effectively moving the engine operating points for any given drive cycle to a more efficient region of the BSFC map. The limit to which downsizing can offer advantages to fuel efficiency therefore comes when the average engine operating points are centred around the minimum BSFC region. To take downsizing further, a number of complementary technologies are being explored with the aim of increasing overall efficiency and extending the operating region of optimum efficiency. Additional benefits can be derived from secondary effects when technologies are combined. This paper summarises such complementary technologies and discusses how they can be used in practice to further optimise gasoline engine efficiency.
F2012-A01-016
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- AFR:
-
Air/fuel ratio (mass)
- BMEP:
-
Brake mean effective pressure
- BSFC:
-
Brake specific fuel consumption
- CO2 :
-
Carbon dioxide
- FBP:
-
Final boiling point (ref: fuel distillation curve)
- FMEP:
-
Friction mean effective pressure
- IBP:
-
Initial boiling point (ref: fuel distillation curve)
- LHV:
-
Lower heating value (or lower calorific value of fuel)
- RON:
-
Research octane number
- RVP:
-
Reid vapour pressure (ref: fuel volatility)
- ULG:
-
Unleaded gasoline
- WCEM:
-
Water cooled exhaust manifold
References
Lenaers G (2009) Real life CO2 emission and consumption of four car powertrain technologies related to driving behaviour and road type. SAE technical papers 2009-24-0127
Oudenijeweme D et al (2011) Downsizing and biofuels: synergies for significant CO2 reductions” 20. Aachener Kolloquium Fahrzeug- und Motorentechnik
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© 2013 Springer-Verlag Berlin Heidelberg
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Freeland, P., Taylor, J., OudeNijeweme, D., Warth, M., Mahr, B. (2013). Technologies for the Next Generation of Downsized Gasoline Engines. In: Proceedings of the FISITA 2012 World Automotive Congress. Lecture Notes in Electrical Engineering, vol 189. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33841-0_6
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DOI: https://doi.org/10.1007/978-3-642-33841-0_6
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-33840-3
Online ISBN: 978-3-642-33841-0
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