Engine having prechamber ignition and method of controlling such an engine
AssigneeLiebherr Machines Bulle SA
InventorsBouzid Seba, Ulrich Weiss, Bakir Puran, Roberto Andreutti
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Abstract
The invention relates to an engine having prechamber ignition, in particular a gas engine, that comprises a main combustion space in a cylinder of the engine for combusting an air-fuel mixture and a prechamber having an ignition device arranged therein and a fuel injector arranged therein, wherein the prechamber has at least one transfer port that fluidically connects the prechamber to the main combustion space. The engine is characterized in that the fuel injector arranged in the prechamber is the only fuel injector via which fuel can be introduced into the associated main combustion space.
Claims34
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).
An engine (1) having 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;
- 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), wherein
- the fuel in combination therewith being combusted is hydrogen or contains more than 70% molecular hydrogen as the main component or as an admixture, and
- the engine (1) is configured to choose the amount of fuel injected into the prechamber (3) by the fuel injector (5) so that the air/fuel ratio inside the prechamber (3) is within the range 0.15<lambda<0.7 at the time of igniting the fuel injected into the prechamber (3).
Dependencies are inferred from the claim text.