US 11,698,021 B2
Engine having prechamber ignition and method of controlling such an engine
Bouzid Seba, Broc (CH); Ulrich Weiss, Villars-sur-Glâne (CH); Bakir Puran, Vuisternens-en-Ogoz (CH); and Roberto Andreutti, Barbengo (CH)
Assigned to Liebherr Machines Bulle SA, Bulle (CH)
Filed by Liebherr Machines Bulle SA, Bulle (CH)
Filed on Mar. 4, 2022, as Appl. No. 17/686,839.
Application 17/686,839 is a continuation of application No. 17/234,893, filed on Apr. 20, 2021, granted, now 11,300,038.
Claims priority of application No. 00481/20 (CH), filed on Apr. 23, 2020; and application No. 00073/21 (CH), filed on Jan. 26, 2021.
Prior Publication US 2022/0251998 A1, Aug. 11, 2022
Int. Cl. F02B 19/12 (2006.01); F02M 25/028 (2006.01); F02M 31/20 (2006.01); F02M 61/14 (2006.01); F02B 19/02 (2006.01)
CPC F02B 19/02 (2013.01) [F02B 19/12 (2013.01); F02M 25/028 (2013.01); F02M 31/20 (2013.01); F02M 61/14 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An engine (1) comprising prechamber ignition, in particular a gas engine, comprising the combination of:
a main combustion space (2) in a cylinder of the engine (1) for combusting an air-fuel mixture;
a prechamber (3);
an ignition device (4) projecting into the prechamber; and
consisting of a single fuel injector (5) projecting into the prechamber (3),
wherein the prechamber (3) has at least one transfer point (6) that fluidically connects the prechamber (3) to the main combustion space (2),
the fuel injector (5) projecting into the prechamber (3) is the only fuel injector (5) via which fuel can be introduced into the associated main combustion space (2), and
the fuel in combination therewith being combusted is hydrogen or contains more than 70% molecular hydrogen as the main component or as an admixture, said fuel always having an ignition capability for lambda at or above 2.5 and particularly preferably an ignition capability for lambda equal to or above 3 and very particularly preferably an ignition capability for lambda equal to or above 5.