SAE Technical Paper Series 1988
DOI: 10.4271/881630
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Considerations in the Design of an Inexpensive Hydrogen-Fueled Engine

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Cited by 13 publications
(3 citation statements)
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“…Because of the high flame speeds of hydrogen, low turbulence combustion chambers (pancake or disk chamber and axially aligned symmetric intake port) can be used, which can be beneficial for the engine efficiency [130,179,180] (increasing the volumetric efficiency and decreasing heat losses). They might even be necessary to avoid excessive rates of pressure rise (possibly even leading to knocking combustion) at stoichiometric operation [180] (where high in-cylinder turbulence could cause very fast flame speeds).…”
Section: In-cylinder Turbulencementioning
confidence: 99%
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“…Because of the high flame speeds of hydrogen, low turbulence combustion chambers (pancake or disk chamber and axially aligned symmetric intake port) can be used, which can be beneficial for the engine efficiency [130,179,180] (increasing the volumetric efficiency and decreasing heat losses). They might even be necessary to avoid excessive rates of pressure rise (possibly even leading to knocking combustion) at stoichiometric operation [180] (where high in-cylinder turbulence could cause very fast flame speeds).…”
Section: In-cylinder Turbulencementioning
confidence: 99%
“…Measures include the use of cooled exhaust valves; multi-valve engine heads to further lower the exhaust valve temperature [171,173,179]; a proper oil control [147]; additional engine coolant passages around valves and other areas with high thermal loads [180] (if possible); the delay of fuel introduction to create a period of air cooling (using timed manifold or DI); and adequate scavenging (e.g., using variable valve timing [163,181]) to decrease residual gas temperatures. …”
Section: Hot Spotsmentioning
confidence: 99%
“…Clearly, hot spots in the combustion chamber that could initiate surface ignition or backfire are to be avoided or minimized. Measures include the use of cooled exhaust valves; multi-valve engine heads to further lower the exhaust valve temperature [171,173,179]; a proper oil control [147]; additional engine coolant passages around valves and other areas with high thermal loads [180] (if possible); the delay of fuel introduction to create a period of air cooling (using timed manifold or DI); and adequate scavenging (e.g., using variable valve timing [163,181]) to decrease residual gas temperatures.…”
Section: Hot Spotsmentioning
confidence: 99%