Internal-combustion engines – Igniters
Reexamination Certificate
2007-04-17
2007-04-17
Huynh, Hai (Department: 3747)
Internal-combustion engines
Igniters
Reexamination Certificate
active
10521683
ABSTRACT:
A device is described for igniting an air-fuel mixture in an internal combustion engine using a high-frequency electric power source having a coaxial waveguide structure (5) into which the high-frequency electric power may be coupled and whose one end protrudes into the individual combustion chamber of a cylinder of the internal combustion engine. The one end of the coaxial waveguide structure (5) is designed as an igniter (7a) in such a way that, when a voltage potential is applied, a field structure (22), protruding into the combustion chamber, and thus a free-standing plasma in the air-fuel mixture at the inner conductor (7, 7a), projecting from the waveguide structure, is generatable via an abrupt and/or smooth cross-section change (21) of the inner conductor (7) and/or the outer conductor (6).
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R. Stiles, “Investigation of a Radio Frequency Plasma Ignitor for Possible Internal Combustion Engine Use,”, SAE-Paper 970071, Society of Automotive Engineers, Warrendale, PA, US, XP008026009.
Hasch Juergen
Linkenheil Klaus
Ruoss Hans-Oliver
Schmidt Ewald
Thiel Michael
Huynh Hai
Kenyon & Kenyon LLP
Robert & Bosch GmbH
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