Characteristics of combustion pressure vibration in hydrogen fuel injection hot surface ignition engines
In (high pressure hydrogen injection) hot surface ignition engines under nearly all engine operating conditions combustion pressure vibration is generated just after ignition. As a result of many experimental investigations a true nature for the cause of this interesting phenomenon was found and are listed: (1) This phenomenon probably originates from the extremely high local rate of burning of the hydrogen-air mixture. (2) Accompanying the stronger combustion pressure vibration was an increase in engine vibration and noise with increase in NO/sub x/ emission and higher piston temperature. (3) Longer (ignition delay) resulted in a steeper pressure-time diagram which resulted in a stronger combustion pressure vibration. (4) The phenomenon had negligible effect on engine performance. (5) The phenomenon can be prevented by premixing a certain quantity of hydrogen gas into the intake air stream. The result was a shortened ignition delay.
- OSTI ID:
- 5003934
- Report Number(s):
- CONF-8709177-
- Country of Publication:
- United States
- Language:
- English
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AIR
CHEMICAL REACTIONS
COMBUSTION
ENGINES
FLUIDS
FUELS
GASES
HEAT ENGINES
HIGH PRESSURE
HYDROGEN FUELS
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MECHANICAL VIBRATIONS
NOISE
OXIDATION
PERFORMANCE TESTING
SYNTHETIC FUELS
TESTING
THERMOCHEMICAL PROCESSES