Investigation of Supercharging Strategies for PFI Hydrogen Engines Ghent Univ

Format:

Conference/Event

Author/Creator:

Verhelst, Verhelst, author.

Contributor:

Demuynck, Joachim

Martin, Steven

Sierens, Roger

Vermeir, Michael

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

Hydrogen-fueled internal combustion engines (H₂ICEs) are anaffordable, practical and efficient technology to introduce the useof hydrogen as an energy carrier. They are practical as they offerfuel flexibility, furthermore the specific properties of hydrogen(wide flammability limits, high flame speeds) enable a dedicatedH₂ICE to reach high efficiencies, bettering hydrocarbon-fueled ICEsand approaching fuel cell efficiencies.The easiest way to introduce H₂ICE vehicles is throughconverting engines to bi-fuel operation by mounting a port fuelinjection (PFI) system for hydrogen. However, for naturallyaspirated engines this implies a large power penalty due to loss involumetric efficiency and occurrence of abnormal combustion.The present paper reports measurements on a single-cylinderhydrogen PFI engine equipped with an exhaust gas recirculation(EGR) system and a supercharging set-up. The measurements wereaimed at increasing the power output to gasoline engine levels orhigher, while maximizing efficiency and minimizing emissions. Twostrategies were tested: one using stoichiometric mixtures, with orwithout EGR, where a three-way catalyst (TWC) was relied upon foraftertreatment of oxides of nitrogen (NOX); and a second oneusing lean mixtures limiting engine-out NOX emissions so thataftertreatment was not needed.Test results are reported for varying supercharging pressure andengine speed; it is shown that both strategies allow power outputsexceeding gasoline levels. The brake thermal efficiencies for bothstrategies are compared, to derive the best operating strategy as afunction of torque demand and engine speed. It can be concludedthat the lean burn supercharged strategy is best overall

Notes:

Vendor supplied data

Publisher Number:

2010-01-0582

Access Restriction:

Restricted for use by site license