A Proposed Diesel Powertrain to Meet Future Emission Standards and Achieve High Engine Efficiency
Technical Paper
2019-24-0191
ISSN: 0148-7191, e-ISSN: 2688-3627
Sector:
Language:
English
Abstract
Nowadays, powertrain development activity is performed on the base of fulfilling
the stricter emission standards under real driving conditions (RDE). However,
the pressure on automotive industry to reduce CO2 emissions in high
efficient diesel applications results in lower exhaust gas temperatures.
Therefore, it is highly needed to develop advanced vehicle thermal management
methods to both fulfil the targets of emission standards and high thermal
efficiency, without increasing dramatically the powertrain cost. The aim of this
work is to experimentally demonstrate that by utilizing advanced engine and ATS
control methods and revising the engine hardware and subsystems can lead to
significant improvement on the fuel efficiency and emissions of the conventional
diesel powertrain. The revised engine includes an improved combustion system,
completely revised turbocharging and air handling system whilst being heavily
reworked with respect to FMEP reduction. The aftertreatment employs a closed
coupled electrically heated DOC, SCR on filter with an NH3 slip catalyst
followed by an underfloor SCR and NH3 slip catalyst. The urea dosing system is
utilizing double urea injection to maximize the overall performance. The
complete engine and aftertreatment system is controlled by state of the art
control system that can maximize the engine efficiency considering the
performance of the aftertreatment system, this ensuring emissions compliance in
challenging driving missions. The proposed powertrain was extensively tested on
the engine dyno. Under steady state conditions, bsfc was improved by more than
15% compared to the reference LDCV diesel engine, while the bsfc area has been
widely increased. The finalized powertrain was calibrated to reduce the tailpipe
emissions by 50% compared to Euro 6 emission standards while fuel economy was
improved by more than 7% compared to the current powertrain. The latter means
that diesel powertrain can still be considered as a very effective and clean
option due to the further uncovered potential.
Authors
Topic
Citation
Priftis, K., Karvountzis Kontakiotis, A., Gstrein, W., and Schuette, C., "A Proposed Diesel Powertrain to Meet Future Emission Standards and Achieve High Engine Efficiency," SAE Technical Paper 2019-24-0191, 2019, https://doi.org/10.4271/2019-24-0191.Data Sets - Support Documents
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References
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