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Potential of Concomitant Injection of CNG and Gasoline on a 1.6L Gasoline Direct Injection Turbocharged Engine IFP Energies nouvelles
- Format:
- Conference/Event
- Author/Creator:
- Obiols, Obiols, author.
- Conference Name:
- SAE International Powertrains, Fuels and Lubricants Meeting (2011-08-30 : Kyoto, Japan)
- Language:
- English
- Physical Description:
- 1 online resource
- Place of Publication:
- Warrendale, PA SAE International 2011
- Summary:
- The use of CNG in modern spark ignition turbocharged engineoffers many advantages such as high knocking resistance, low CO₂emissions and high specific power outputs. On the other hand,compared to gasoline, the volumetric efficiency is significantlydecreased when CNG is port-injected due to its low energy density.In order to address this issue, recent studies have successfullyhighlighted the advantages on port-injection engines of theCIGAL concept (Concomitant Injection of Gas And Liquid fuels)from IFP Energies Nouvelles.However, the combination of port-injection of CNG with directinjection of gasoline remains unexplored. This paper investigatesthis novel injection concept on the four-cylinder 1.6L turbochargedGDI engine with inlet variable valve timing resulting from thecooperation between PSA Peugeot-Citroen and the BMW Group. Thisengine was fitted with an independent CNG port-injection system anda specific engine management system was implemented in order toallow concomitant injection operation.The first part of the study investigates the potential ofconcomitant injection compared to gasoline and methane operation.On the stock configuration, 29 bar BMEP (370 N.m) were reached at2500 rpm with 30% gasoline and 70% methane in stoichiometricconditions. Also, significant reductions of fuel consumption and HCemissions were observed. Full load tests carried out with a smallerturbocharger enhanced the synergy effect between the two fuels atlower speeds.The second part of this work focuses on the reliability of thegasoline direct injectors during CNG operation. Temperaturemeasurements on the gasoline injector nozzles were carried out ingasoline, CNG and concomitant injection modes. Finally, the resultsof gasoline direct injectors durability tests under CNG andgasoline operation are discussed
- Notes:
- Vendor supplied data
- Publisher Number:
- 2011-01-1995
- Access Restriction:
- Restricted for use by site license
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