Performance of a Port Fuel Injected, Spark Ignition Engine Optimised for Hydrogen Fuel University of Melbourne

Format:

Conference/Event

Author/Creator:

Dennis, Dennis, author.

Contributor:

Abbasi Atibeh, Payman

Brear, Michael J.

Dingli, Robert J.

Voice, Glen

Watson, Harry C.

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

This paper presents a study of the performance of a 6-cylinder,spark-ignited, port-fuel-injected, production engine modified forhydrogen fueling. The engine modifications include turbo-charging,multiple fuel injectors per port and charge-dilution controltechniques. Pumping losses are reduced through ultra-lean burn andthrottle-less operation alongside high charge dilution ratiocontrol achieved by twin independent variable cam timing withoutexternal EGR.Lean-burn combustion, engine-out emissions and brake thermalefficiency results are examined in detail. In particular, low NOemissions and brake thermal efficiencies near 38% are observedexperimentally at the same operating conditions. The former isexplained in terms of the usual thermal NOx pathway.Usage of throttle position, injection timings and cam timings foravoiding preignition and knock over the entire engine map are alsodiscussed. Finally, first law analyses of energy losses for varyingcam timings, varying manifold pressure and varying torque arepresented and used to suggest reasons for values of λ for optimalBTE in each case

Notes:

Vendor supplied data

Publisher Number:

2012-01-0654

Access Restriction:

Restricted for use by site license