To understand the occurrence of backfire in hydrogen fueled engines using an external (inducted) fuel supply, a fundamental study was completed using a modified experimental engine. A relation was found between the crevice volume in the combustion chamber and the occurrence of backfire. The results showed that the crevice around the spark plug electrode was not a major cause of backfire, but the combustion state of the mixture in the piston top land crevice, second land, and ring groove did have a direct affect on backfire occurrence. By increasing the top land crevice volume and the amount of blow-by gas, the equivalence ratio before backfire occurred was extended.
Issue Section:
Internal Combustion Engines: Hydrogen-fueled Engines
Keywords:
engines,
hydrogen economy,
combustion,
gas mixtures,
fuel,
size effect,
control of specific variables
Topics:
Cylinders,
Engines,
Hydrogen fuels,
Pistons,
Temperature,
Coolants,
Combustion,
Pressure,
Fuels,
Flow (Dynamics)
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Copyright © 2001
by ASME
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