IFP Energies Nouvelles Approach for Dual Fuel Diesel-Gasoline Engines IFP Energies nouvelles

Format:

Conference/Event

Author/Creator:

Duffour, Duffour, author.

Contributor:

Pagot, Alexandre

Ternel, Cyprien

Conference Name:

10th International Conference on Engines & Vehicles (2011-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

Compared to Spark Ignition (SI) engines, Compression Ignition(CI) engines are more efficient because of the higher compressionratios and leaner operation. However, thanks to stoichiometric airfuel ratio, SI engines allow efficient pollutants after treatment,particularly for NOx emissions. In this context, IFP Energiesnouvelles (IFPEN) has developed the concept of diesel-gasolinecombustion in order to combine the advantages of both fuels andboth combustion processes.Focusing on a passenger car application, experiments have beenperformed using a modified DI turbocharged small diesel engine (thecombustion chamber has been redesigned and port fuel injectors havebeen added). In-Cylinder Fuel Blending (ICFB) usingport-fuel-injection of gasoline and optimized direct injection ofdiesel was used to control combustion phasing and duration. Thismodified engine can still run on diesel alone. ICFB mode isconsidered, either with a lean mixture, or at stoichiometricair-fuel ratio to perform NOx aftertreatment via a 3-way catalyst.The objective is to control the NOx emissions over the wholeoperating range of the engine, while maintaining attractive fuelefficiency.In this paper, IFP Energies nouvelles describes the main resultsof diesel-gasoline combustion, in order to understand what would bethe best approach in terms of technological feasibility, fuelefficiency and pollutant emissions. The potential of the dual fuelconcept has been investigated on several part load operatingconditions, focused on a 2000 rpm engine speed. The operable rangeof load in ICFB combustion is extended from 7 to 16.5 bar IMEP.BSFC at part load is as low as that of a diesel engine. At higherload, NOx emissions are very low (0.5 g/kWh at 10 bar IMEP) andallow lean mixture operation until 14 bar IMEP. Outside of thisICFB operating range, the performance in full diesel mode remainstotally acceptable

Notes:

Vendor supplied data

Publisher Number:

2011-24-0065

Access Restriction:

Restricted for use by site license