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Favre, Cecile
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Diesel Vehicle with Ultra-Low NOx Emissions on the Road

AECC-Joachim Demuynck, Cecile Favre, Dirk Bosteels
IAV-Frank Bunar, Joachim Spitta, Andreas Kuhrt
Published 2019-09-09 by SAE International in United States
The gap between diesel vehicle emissions in laboratory tests compared to those in use has been addressed by the introduction of the Real Driving Emissions (RDE) requirements. Modern diesel technology now demonstrates low emissions on the road over a wide range of driving conditions. This paper further demonstrates that consistent low nitrogen oxide (NOx) and particle number (PN) emissions can be achieved over a wide range of driving conditions beyond Euro 6d RDE requirements, with emission control technologies combined in an integrated approach.An LNT (Lean NOx Trap) is combined with a dual-dosing SCR (Selective Catalytic Reduction) system. Low-load NOx control is achieved by the LNT in combination with a close-coupled SCR coated on the Diesel Particulate Filter (SDPF). High load conditions, on the other hand, are covered by the underfloor SCR system with a second AdBlue® injector. A P0 48V mild-hybrid system is also available to support the NOx control and to ensure good driving performance and fuel efficiency. An advanced control strategy is implemented to ensure optimal interaction between all emission control functionalities. The…
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Real-World Emissions Measurements of a Gasoline Direct Injection Vehicle without and with a Gasoline Particulate Filter

AECC-Joachim Demuynck, Cecile Favre, Dirk Bosteels
Concawe-Heather Hamje
Published 2017-03-28 by SAE International in United States
The market share of Gasoline Direct Injection (GDI) vehicles has been increasing, promoted by its positive contribution to the overall fleet fuel economy improvement. It has however been reported that this type of engine is emitting more ultrafine particles than the Euro 6c Particle Number (PN) limit of 6·1011 particles/km that will be introduced in Europe as of September 2017 in parallel with the Real Driving Emission (RDE) procedure.The emissions performance of a Euro 6b GDI passenger car was measured, first in the OEM build without a Gasoline Particulate Filter (GPF) and then as a demonstrator with a coated GPF in the underfloor position. Regulated emissions were measured on the European regulatory test cycles NEDC and WLTC and in real-world conditions with Portable Emissions Measurement Systems (PEMS) according to the published European RDE procedure (Commission Regulation (EU) 2016/427 and 2016/646). Finally, tests were conducted on the chassis dyno to explore the impact of going towards the RDE boundary conditions (driving dynamics and ambient temperature as defined in the RDE legislation).PN results showed that the vehicle…
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On-Road and Chassis Dynamometer Evaluations of Emissions from Two Euro 6 Diesel Vehicles

SAE International Journal of Fuels and Lubricants

AECC-John May, Cecile Favre, Dirk Bosteels
Ricardo UK-Jon Andersson, Simon de Vries, Matthew Heaney, Matthew Keenan, Jonathon Mansell
  • Journal Article
  • 2014-01-2826
Published 2014-10-13 by SAE International in United States
The exhaust emissions of two Euro 6 diesel cars with different emissions control systems have been evaluated both on the road and over various chassis dynamometer test cycles. European emissions limits are currently set using the New European Driving Cycle (NEDC), but the European Commission is preparing additional test procedures to ensure that emissions are well controlled both in real-world use and over the legislative test cycle. The main focus of this work on ‘Real Driving Emissions’ (RDE) is on measurements using Portable Emissions Measurement Systems (PEMS) in truly representative, on-road, driving. A key focus of the test programme, undertaken as a collaboration between AECC (the Association for Emissions Control by Catalyst) and Ricardo UK, was therefore the use of PEMS systems to measure on-road emissions of both gaseous pollutants and particulate matter. This included measurement of particle number emissions with a new candidate system for this type of measurement.The results from this testing are compared with emissions measured over four different chassis dynamometer test cycles - the current legislative cycle (New European Driving Cycle,…
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An Assessment of Emissions from Light-Duty Vehicles using PEMS and Chassis Dynamometer Testing

SAE International Journal of Engines

AECC-John May, Dirk Bosteels, Cecile Favre
  • Journal Article
  • 2014-01-1581
Published 2014-04-01 by SAE International in United States
From 1 September 2014 new car types in the EU must meet ‘Euro 6’ emissions requirements. The ‘New European Driving Cycle’ (NEDC) is currently the main test for this, but the European Commission intends to also introduce PEMS (Portable Emissions Measurement Systems)-based procedures to ensure that emissions are well controlled in real use. ‘Random Cycles’ have also been considered and remain a possible option for ‘real world’ particle number measurement. At the same time, the UN Working Party on Pollution and Energy (GRPE) has developed the new Worldwide harmonized Light vehicles Test Procedure (WLTP) that is expected to be adopted in the EU in the near future. To identify and understand the differences in emissions that may arise between these various methodologies, AECC has conducted some initial tests on two modern light-duty vehicles.Chassis dynamometer emissions tests were conducted over the NEDC, the Common Artemis suite of test cycles (CADC), the new Worldwide Light-duty Test Cycle (WLTC - the test cycle for WLTP) and a set of cycles produced by a Random Cycle Generator based on…
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A Demonstration of Emissions' Behaviour of Various Handheld Engines Including Investigations on Particulate Matter

Association for Emissions Control by Catalyst (AECC) AISBL-Cecile Favre, John May, Dirk Bosteels
Graz University of Technology-Jurgen Tromayer, Gerd Neumann
Published 2013-10-15 by Society of Automotive Engineers of Japan in Japan
To get an overview of the emission situation in the field of small non-road mobile machinery powered by various types of SI engines, the Association for Emissions Control by Catalyst (AECC), together with the Institute for Internal Combustion Engines and Thermodynamics (IVT) of Graz University of Technology, conducted a customized test program. The main goal for this campaign was to derive information regarding the emissions of regulated gaseous components (following European Directive 97/68/EC) as well as particulate matter. With regard to the big variety of different engines that are available on the European and North-American market, the most representative ones had to be chosen. This resulted in a pool of test devices to cover different engine working principles (2-Stroke and 4-Stroke), technological standards (low-cost and professional tools) and different emissions control strategies (advanced combustion and exhaust gas aftertreatment). The test results illustrate a wide range of emissions' behaviour depending on engine technologies and testing conditions and can serve as a database of in-field emissions of small handheld applications. Particulate matter emissions were also measured in…
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Exhaust Emissions from European Market-Available Passenger Cars Evaluated on Various Drive Cycles

AECC-Cecile Favre, Dirk Bosteels, John May
Published 2013-09-08 by SAE International in United States
AECC, the Association for Emissions Control by Catalyst, conducted a test program to compare the newly developed World-harmonized Light vehicles Test Cycle (WLTC) with the current European regulatory New European Drive Cycle (NEDC) and the cold-start Common Artemis Driving Cycle (CADC).Vehicle engines and aftertreatment technologies were selected to cover a wide range of future systems. Six European commercially available passenger cars were chosen: three Euro 5 Gasoline Direct Injection cars, two Euro 6 Diesel cars and a Euro 5 non-plug-in gasoline hybrid car. The hybrid car was tested with three different battery state of charge: nominal, minimum charge, and maximum charge.Investigations on the test temperature were also conducted by comparing emissions at 25°C and at −7°C. Regulated gaseous emissions (HC, CO, NOx) and particulate mass and particles number were measured, together with additional pollutants such as CH4, NO2 and ammonia.The study isolated cycle-to-cycle effects on emissions for each vehicle by normalizing the test mass in all tests to the draft WLTP (World-harmonized Light vehicles Test procedure) Global Technical Regulation (gtr). Because of the higher inertia…
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