US 11,725,571 B1
Spark ignition direct injection engine with active pre-chamber
Patrick Gastaldi, Gif sur Yvette (FR)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Apr. 27, 2022, as Appl. No. 17/660,958.
Int. Cl. F02B 19/12 (2006.01); F02M 61/18 (2006.01); F02B 19/18 (2006.01)
CPC F02B 19/12 (2013.01) [F02B 19/18 (2013.01); F02M 61/1813 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A fuel ignition device for an engine having a plurality of cylinders, comprising:
an active pre-chamber, the active pre-chamber comprising:
a fuel inlet for introducing fuel into the active pre-chamber;
a spark plug configured to ignite a fuel-air mixture in the active pre-chamber; and
a plurality of holes arranged circumferentially around a lower end of the active pre-chamber, the plurality of holes being configured to provide fluid communication between the central chamber and a combustion main chamber of the engine;
wherein each of the plurality of holes are configured to produce a hot jet into the combustion main chamber at an angle between 60 and 80° with respect to a centerline through the active pre-chamber and the combustion main chamber.