US 12,188,399 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 Dec. 20, 2023, as Appl. No. 18/390,561.
Application 18/390,561 is a continuation of application No. 18/200,697, filed on May 23, 2023, granted, now 12,092,015.
Application 18/200,697 is a continuation of application No. 17/686,839, filed on Mar. 4, 2022, granted, now 11,698,021, issued on Jul. 11, 2023.
Application 17/686,839 is a continuation of application No. 17/234,893, filed on Apr. 20, 2021, granted, now 11,300,038, issued on Apr. 12, 2022.
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 2024/0200488 A1, Jun. 20, 2024
Int. Cl. F02B 19/12 (2006.01); F02B 19/02 (2006.01); F02M 25/028 (2006.01); F02M 31/20 (2006.01); F02M 61/14 (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)] 34 Claims
OG exemplary drawing
 
1. A method of operating an engine (1) with prechamber ignition, in particular a gas engine, said engine (1) 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 (3);
a fuel injector (5) projecting into the prechamber (3); and
at least one transfer point (6) fluidically connecting the prechamber (3) to the main combustion space (2),
said method comprising the steps of
operating the engine (1) with a fuel which is hydrogen or contains more than 70% molecular hydrogen as the main component or as an admixture, and
choosing the amount of fuel injected into the prechamber (3) by the fuel injector (5) so that the air/fuel ratio inside the prechamber is within the range 0.15<lambda<0.7 at a time of igniting the fuel injected into the prechamber (3).