Hoerbiger Kompressortechnik Holding Gmbh

Prometheus Applied Technologies, LLC

Greg Beshouri

Luigi P Tozzi

Maria-Emmanuella Sotiropoulou

David Thomas Lepley

Matthias Huschenbett

In certain embodiments, a unique method and pre-combustion chamber (PCC) structure may ensure very efficient flame propagation of lean fuel-air mixture in natural gas engines by reducing the amount of fuel admitted to the PCC. A PCC may include an enclosed volume of 1-3% of the main combustion chamber volume, with a spark plug and a fuel passage located opposite one or more PCC discharge nozzles to create a relatively richer fuel-air mixture with relatively lower turbulence in the spark plug region and a relatively leaner fuel-air mixture with relatively high turbulence in the nozzle region, which can be reliably and efficiently ignited, resulting in a high velocity flame jet/torch emerging from the prechamber into the main chamber. The PCC may be threaded with a 22 mm&#xd7;1.5 or &#x215e;&#x2033;-18 thread size, to allow the PCC to be screwed into a cylinder head in place of a spark plug.

Lean-burn pre-combustion chamber

A method and system for igniting a lean fuel mixture in a main chamber of an internal combustion engine by igniting a rich air-fuel mixture in a pre-combustion chamber which is fuelled using a controlled valve. For a stable and consistent ignition of the main chamber and simultaneous reduction of emission of the internal combustion engine, a closed loop control adjusts the fuel amount and the fuelling time for the pre-combustion chamber in order to achieve a light off in an optimal time window and by sufficient ignition energy.

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Berkeley, CA, United States of America

Greg Beshouri