Characterization of RME, RME Aged and Mineral Diesel Fuel Injected by a Common Rail Apparatus for EURO5 Diesel Engines Istituto Motori - CNR

Format:

Conference/Event

Author/Creator:

Allocca, Allocca, author.

Contributor:

Montanaro, A.

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:

Alternative diesel fuels from renewable sources (biodiesels)have increased significantly interest due to their potential CO₂emission benefits, capability to reduce unburned hydrocarbons andparticulate matter emissions, biodegradability andnon-toxicity.Biodiesels undergo ageing effects due to autoxidation processesof their molecular chains. Ageing leads to a variety ofdecomposition products like peroxides, alcohols, aldehydes andcarboxylic acids. They are detectable as alterations of chemicalproperties, odor and taste (rancidity).The characteristics of Rapeseed Methylester (RME), RME aged anddiesel sprays have been analyzed for different injection strategiesin engines. The tests have been performed on a Bosch secondgeneration common rail solenoid-driven fuel injection systemcapable of 160 MPa maximum injection pressure, fitted on EURO5diesel engine for passenger car applications. Three different fluxnumber injectors have been adopted at the injection pressures of40, 80 and 160 MPa with 1.0, 0.6 and 0.3 ms solenoid energizingtime. The characterization of the injection process for the definedfuels has been carried out in terms both of fuel injection rate aswell as of spatial and temporal fuel distribution in a quiescentchamber in non-evaporative conditions.Largest discharging nozzle area produced highest fuel injectionrate while smallest area created longest injection duration atparity of solenoid exciting time. Digital processing of the sprayimages, captured at different instant from the start of injection,has enabled the characterization of the fuel dispersion in terms oftip penetration and cone angle. Differentiate behavior of theinjected fuel has been noted for the diverse nozzles at early timefrom the start of injection.Finally, a detailed reconstruction of the jet images, at veryearly time from the start of injection, has highlighted repetitiveanomalies in the jet-to-jet propagations. Their absolute values andstabilizing time depend on the nozzle type and injection pressure.At late time, the sprays uniform themselves with a homogeneouspattern in the vessel

Notes:

Vendor supplied data

Publisher Number:

2011-01-1938

Access Restriction:

Restricted for use by site license