US 12,031,482 B2
Torch ignitors with gas assist start
Jason A. Ryon, Carlisle, IA (US); and Brandon Phillip Williams, Johnston, IA (US)
Assigned to Delavan, Inc., Des Moines, IA (US)
Filed by Collins Engine Nozzles, Inc., Des Moines, IA (US)
Filed on Jun. 15, 2023, as Appl. No. 18/210,139.
Application 18/210,139 is a division of application No. 17/133,054, filed on Dec. 23, 2020, granted, now 11,708,793.
Prior Publication US 2023/0323811 A1, Oct. 12, 2023
Int. Cl. F02C 7/264 (2006.01); F02C 3/00 (2006.01); F02C 7/04 (2006.01); F23R 3/00 (2006.01); F23R 3/34 (2006.01)
CPC F02C 7/04 (2013.01) [F02C 3/00 (2013.01); F02C 7/264 (2013.01); F23R 3/002 (2013.01); F23R 3/343 (2013.01); F05D 2220/32 (2013.01); F23R 2900/03343 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method comprising:
issuing liquid from a fuel injector into a combustion chamber of a torch ignitor;
issuing air from the fuel injector into the combustion chamber;
issuing a separate stream of assist gas into the combustion chamber via a passage passing through a cap defining the axially upstream end of the combustion chamber and oriented about an axis from an exterior of the combustion chamber, while issuing air from the fuel injector;
flowing the liquid from the fuel injector, the air from the fuel injector, and the stream of assist gas into the combustion chamber to form a first fuel-air mixture;
igniting the first fuel-air mixture within the combustion chamber via a resistive heating element; and
reducing the separate stream of assist gas into the combustion chamber after the first fuel-air mixture reaction is sustained but while the first fuel-air mixture is ongoing.