A Synergic Use of Innovative Technologies for the Next Generation of High Efficiency Internal Combustion Engines for PHEVs: The PHOENICE Project
Technical Paper
2023-01-0224
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Despite the legislation targets set by several governments of a full
electrification of new light-duty vehicle fleets by 2035, the development of
innovative, environmental-friendly Internal Combustion Engines (ICEs) is still
crucial to be on track toward the complete decarbonization of on road-mobility
of the future. In such a framework, the PHOENICE (PHev towards zerO EmissioNs
& ultimate ICE efficiency) project aims at developing a C SUV-class plug-in
hybrid (P0/P4) vehicle demonstrator capable to achieve a -10% fuel consumption
reduction with respect to current EU6 vehicle while complying with upcoming EU7
pollutant emissions limits.
Such ambitious targets will require the optimization of the whole engine system,
exploiting the possible synergies among the combustion, the aftertreatment and
the exhaust waste heat recovery systems. Focusing on the first aspect, the
combined use of innovative in-cylinder charge motion, Miller cycle with high
compression ratio, lean mixture with cooled EGR and electrified turbocharger
will enable a highly diluted combustion process capable to achieve a peak
indicated efficiency of 47% and, at the same time, to minimize the engine out
emissions. Numerical simulations were intensively exploited to reduce the engine
calibration time and to preliminary assess the benefits of the abovementioned
technologies. In particular, 3D-CFD simulations highlighted the capabilities of
the SwumbleTM intake ports to produce an increase of about 50% of the
Turbulent Kinetic Energy (TKE), while 1D-CFD models showed possible further
enhancements of the brake thermal efficiency through the use of the new
turbocharger (+2%) and of an aggressive Millerization of the cycle (+1.1%).
Finally, a preliminary experimental campaign, performed on the first engine
prototype, confirmed the encouraging results of the simulation activity. With an
AFR = 1.43 and an EGR ratio close to 5%, the PHOENICE engine showed a further
improvement in the BTE up to 4% and a simultaneous reduction of the NOx
emissions of more than 70% in comparison with conventional stoichiometric,
undiluted operation.
Authors
- Toni TAHTOUH - IFP Energies nouvelles I.Carnot IFPEN TE
- Federico Millo - Politecnico di Torino
- Luciano Rolando - Politecnico di Torino
- Giuseppe Castellano - Politecnico di Torino
- Mauro Brignone - Marelli
- Jason Cleeton - Johnson Matthey ECT
- Nicolas Demeilliers - In Extenso Innovation Croissance
- Gennaro Lucignano - Stellantis
- Juan Sierra Castellanos - Garrett Motion
- Alessandro Perazzo - FEV Group GmbH
Topic
Citation
TAHTOUH, T., Millo, F., Rolando, L., Castellano, G. et al., "A Synergic Use of Innovative Technologies for the Next Generation of High Efficiency Internal Combustion Engines for PHEVs: The PHOENICE Project," SAE Technical Paper 2023-01-0224, 2023, https://doi.org/10.4271/2023-01-0224.Also In
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