Methods and systems are provided for a vehicle engine having a pre-chamber ignition system. In one example, a method may include adjusting one or more of an air injection amount and a fuel injection amount to a pre-chamber of an engine based on an air injection offset and a fuel injection offset learned while discontinuing fueling to cylinders of the engine and reducing air flow through the engine. In this way, air and fuel may be more accurately provided to the pre-chamber, thereby decreasing an occurrence of pre-chamber misfire.

An internal combustion gas engine (2) is disclosed. It includes a cylinder arrangement (4) and a first compressor (6) for compressing a gaseous fuel and air mixture. The at least one cylinder arrangement (4) forms a combustion chamber (8) and includes an intake arrangement (10) for intake of charge gas, a sparkplug (12), and a pre-chamber (14). The engine (2) comprises a second compressor (16) for compressing a gaseous medium, and a pressure reducer (18). An outlet (20) of the first compressor (6) is arranged in parallel with an outlet (22) of the second compressor (16). The outlet (20) of the first compressor (6) is connected to the pre-chamber (14). The outlet (20) of the first compressor (6) and the outlet (22) of the second compressor (16) are connected to the pressure reducer (18). An outlet (24) of the pressure reducer (18) is connected to the intake arrangement (10).

Methods and systems are provided for a prechamber. In one example, the prechamber comprises one or more valves for optionally adjusting gas flow therethrough. The one or more valves may allow pre-chamber and combustion chamber settings to be modified, thereby enhancing combustion operating parameters.

Internal combustion engine, preferably a gas engine, comprising a pre-chamber having a pre-chamber intake system and a main combustion chamber having a main combustion chamber intake system, wherein by use of the intake systems a predetermined amount of energy of fuel can be supplied to the main combustion chamber for a combustion, wherein a control unit is configured to control the intake systems according to the following operation modes: a first operation mode, in which a majority of a fuel energy amount for the combustion in the main combustion chamber is supplied directly to the main combustion chamber by use of the main combustion chamber intake system, and a second operation mode, in which a majority of the fuel energy amount for the combustion in the main combustion chamber is supplied via the pre-chamber to the main combustion chamber by use of the pre-chamber intake system.

An internal combustion gas engine (2) is disclosed. It includes a cylinder arrangement (4) and a first compressor (6) for compressing a gaseous fuel and air mixture. The at least one cylinder arrangement (4) forms a combustion chamber (8) and includes an intake arrangement (10) for intake of charge gas, a sparkplug (12), and a pre-chamber (14). The engine (2) comprises a second compressor (16) for compressing a gaseous medium, and a pressure reducer (18). An outlet (20) of the first compressor (6) is arranged in parallel with an outlet (22) of the second compressor (16). The outlet (20) of the first compressor (6) is connected to the pre-chamber (14). The outlet (20) of the first compressor (6) and the outlet (22) of the second compressor (16) are connected to the pressure reducer (18). An outlet (24) of the pressure reducer (18) is connected to the intake arrangement (10).

Disclosed is a valve ignition prechamber for an internal combustion engine which includes a combustion chamber in which a main load more or less diluted with a neutral gas is ignited, the prechamber including a lamination cavity into which an ignition unit opens and in which a lamination injector can inject under pressure an easily flammable pilot load, a lamination valve being able to close all or part of the lamination duct, in particular under the effect of the pressure of the gases prevailing in the combustion chamber.

Internal combustion engine comprising at least one cylinder and a piston supported for repeated reciprocal movement in the cylinder so as to define a combustion chamber of an engine bore diameter A-A, the internal combustion engine further comprising an ignition device arranged in said cylinder having an igniter portion and an fuel injector which are both arranged in a pre-chamber, wherein the pre-chamber comprises a plurality of orifices for providing fluid communication between said pre-chamber and the combustion chamber, and wherein the plurality of orifices are of an overall orifice area so that the ratio between the overall orifice area and the engine bore diameter A-A ranges from 0.01 mm to 0.2 mm.

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.

An internal combustion engine includes an intake manifold, at least one cylinder head with a plurality of piston-cylinder-units, at least one ammonia source, and at least one hydrogen source. Each piston-cylinder-unit includes at least a main combustion chamber, at least one intake valve, a prechamber coupled to the main combustion chamber, and an ignition device in the prechamber. The at least one ammonia source is configured to provide ammonia to each piston-cylinder unit. The at least one hydrogen source is configured to provide hydrogen to each prechamber, wherein the at least one hydrogen source includes at least one reformer for cracking ammonia.

A system comprising an electronic control unit configured to provide an intake manifold of an internal combustion engine with a mixture of fuel gas, air and exhaust gas with a lambda (?) of approximately 1 and an exhaust gas recirculation (EGR) content of about 10% to about 45%, wherein the internal combustion engine comprises a prechamber coupled to a main combustion chamber, wherein the main combustion chamber is formed in a cylinder by a piston and at least one cylinder head, wherein a source of a gas-air mixture into the prechamber comprises: an intake port of the main combustion chamber and a connection line between the intake port and a prechamber gas valve of the prechamber; or an intake manifold and a connection line between the intake manifold and the prechamber gas valve of the prechamber.