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Experimentally Based Methodology to Evaluate Fuel Saving and CO 2 Reduction of Electrical Engine Cooling Pump during Real Driving
- Marco Di Bartolomeo - University of L’Aquila, Department of Industrial and Information Engineering and Economics, Italy ,
- Davide Di Battista - University of L’Aquila, Department of Industrial and Information Engineering and Economics, Italy ,
- Roberto Cipollone - University of L’Aquila, Department of Industrial and Information Engineering and Economics, Italy
Journal Article
03-16-05-0041
ISSN: 1946-3936, e-ISSN: 1946-3944
Sector:
Topic:
Citation:
Di Bartolomeo, M., Di Battista, D., and Cipollone, R., "Experimentally Based Methodology to Evaluate Fuel Saving and CO2 Reduction of Electrical Engine Cooling Pump during Real Driving," SAE Int. J. Engines 16(5):693-707, 2023, https://doi.org/10.4271/03-16-05-0041.
Language:
English
Abstract:
Engine thermal management (ETM) is a promising technology that allows the
reduction of harmful emissions and fuel consumption when the internal combustion
engine (ICE) is started from a cold state. The key technology for ETM is the
decoupling of the cooling pump from the crankshaft and the actuation of the pump
independently. In this article, an electric engine cooling pump has been
designed through a novel experimentally based procedure and operated on a
vehicle equipped with an advanced turbocharged gasoline engine, particularly
interesting for its hybridization potential. In the first phase, a dedicated
experimental campaign was conducted off board on an engine identical to the one
equipped in the vehicle to assess the characteristics of the cooling circuit and
the reference pump performances. The experimental data have been used to design
an electric pump with a best efficiency point (BEP) located in a region more
representative of the real operating conditions faced by the vehicle during real
driving. Once prototyped, the electric pump has been compared to the reference
mechanical one on a real driving mission profile whose parameters have been
experimentally evaluated. The comparison was made in the same operating
conditions of flow rate and the pressure head acting on the revolution speed of
the prototype to focus the attention on the effect of the different design
choices made possible by the electric actuation. The procedure can evaluate the
pump-related fuel consumption, whatever the real vehicle speed profile and the
actuation of the pump. The results show that in a driving cycle with urban,
extra-urban, and highway phases, the electric pump absorbs 66% less power
compared to the mechanical one, which translates into a 0.55 gCO2/km
specific emission reduction. This demonstrates the validity of the novel design
procedure together with the benefits of the electric actuation.