US PATENT SUBCLASS 123 / 253
PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

253PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES {22}
254  DF  .~> Chamber temperature control means
255  DF  .~> Vaporizing in precombustion chamber
256  DF  .~> Plural precombustion chambers
257  DF  .~> Two-cycle
258  DF  .~> Having timed valves to precombustion and main combustion chambers
259  DF  .~> Having volumetric relation between precombustion and main combustion chambers
260  DF  .~> With ignition means particularly positioned relative to precombustion and main combustion chambers
261  DF  .~> With injection means particularly positioned relative to precombustion and main combustion chambers
262  DF  .~> Having fluid whirling means {1}
264  DF  .~> Precombustion chamber is carried by a valve
265  DF  .~> Precombustion and main chambers form an "I" head
266  DF  .~> Precombustion chamber assembly inserted in spark plug hole {1}
268  DF  .~> Valveless precombustion chamber
269  DF  .~> Piston shape complements precombustion chamber discharge
270  DF  .~> Precombustion chamber liner or coating {2}
273  DF  .~> Precombustion chamber mounting means
274  DF  .~> Having combustible mixture forming means {1}
279  DF  .~> Piston carried precombustion chamber
280  DF  .~> Atomizer, deflector, or shield in precombustion chamber
281  DF  .~> Precombustion chamber shape is a figure of revolution {3}
285  DF  .~> Precombustion chamber having a specific shape
286  DF  .~> Having specific connecting passage means between precombustion and main combustion chambers {5}

DEFINITION

Classification: 123/253

PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES:

(under the class definition) Subject matter having at least two distinct physical volumes or chambers in which combustion occurs. The combustion is multi-stage and is initiated in a first chamber, known as a prechamber or auxiliary combustion chamber, and spreads into a final or "main" combustion chamber where combustion is complete and expansion occurs.

(1) Note. The prechamber must be a volume that is physically provided for and distinct from the main combustion space and must have at least intermittent fluid communication with the main chamber.

(2) Note. Multiple prechambers may be provided for, emptying serially into each other and then into the main chamber, or each emptying in parallel into the main chamber.