We experimentally investigated effects of pilot diesel-fuel injection on ignition timing variation and noise reduction in a diesel engine with hydrogen addition to the intake pipe. The pilot diesel-fuel injection suppressed ignition timing variation which was significant under hydrogen addition conditions. The heat release by the pilot diesel-fuel injection stably acted as an ignition source of the hydrogen-air mixture. The maximum in-cylinder pressure rise rate increased with the hydrogen fraction. However, the sound pressure level attained minimum around a specific hydrogen fraction.
Combustion and Noise Characteristics in a Diesel Engine with Hydrogen Addition and Pilot Injection
Sae Technical Papers
JSAE/SAE 2015 International Powertrains, Fuels & Lubricants Meeting ; 2015
2015-09-01
Conference paper
English
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