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US 12,473,870 B2Granted
Internal combustion engine and method for operating an internal combustion engine
AssigneeInnio Jenbacher GmbH & Co OG
InventorNikolaus Spyra
Life of this patent
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Abstract
An engine controller, for an internal combustion engine, is configured to: control at least one actuator to provide an air-fuel mixture with a lambda value higher than 3 to a main combustion chamber via at least one intake valve, wherein the at least one actuator is arranged upstream of at least one intake port or which is arranged in the intake port; control at least one fuel supply system to provide fuel directly to the main combustion chamber and/or a pre-combustion chamber of a piston-cylinder unit such that at the time of ignition of the air-fuel mixture the lambda value of that air-fuel mixture in the main combustion chamber is lower than the lambda value of the air-fuel mixture provided to the main combustion chamber via the at least one intake valve.
Claims20
An internal combustion engine, comprising:
- at least one piston-cylinder unit in which an air-fuel mixture is combustible,
- at least one intake port fluidically connected to the at least one piston-cylinder unit of the internal combustion engine, the at least one intake port being fluidically separable from the at least one piston-cylinder unit via at least one intake valve,
- at least one exhaust port fluidically connected to the at least one piston-cylinder unit of the internal combustion engine, the at least one exhaust port being fluidically separable from the at least one piston-cylinder unit via at least one exhaust valve,
- a fuel supply line fluidically connected to at least one fuel supply system, the at least one fuel supply system being configured to supply fuel, comprising hydrogen, directly into a main combustion chamber and/or a pre-combustion chamber of the at least one piston cylinder unit, and
- an engine controller configured to control operation of the internal combustion engine, wherein the engine controller is configured to:
- control at least one actuator to provide an air-fuel mixture with a lambda value higher than a threshold lambda value to the main combustion chamber via the at least one intake valve at a first crank angle before top dead center (TDC) of a piston of the piston-cylinder unit during a compression stroke, wherein the at least one actuator is arranged upstream of the at least one intake port or which is arranged in the intake port;
- control the at least one fuel supply system to provide the fuel comprising hydrogen directly to the main combustion chamber and/or the pre-combustion chamber of the piston-cylinder unit at a second crank angle after the first crank angle before TDC, such that at the time of ignition of the air-fuel mixture the lambda value of that air-fuel mixture in the main combustion chamber is lower than the lambda value of the air-fuel mixture provided to the main combustion chamber via the at least one intake valve.
4 more elements
A system, comprising:
- an engine controller configured to control operation of an internal combustion engine, wherein the engine controller is configured to:
- control at least one actuator to provide an air-fuel mixture with a lambda value higher than a threshold lambda value to a main combustion chamber via at least one intake valve at a first crank angle before top dead center (TDC) of a piston of the piston-cylinder unit during a compression stroke, wherein the at least one actuator is arranged upstream of at least one intake port or which is arranged in the intake port;
- and
- control at least one fuel supply system to provide a fuel comprising hydrogen directly to the main combustion chamber and/or a pre-combustion chamber of a piston-cylinder unit at a second crank angle after the first crank angle before TDC, such that at the time of ignition of the air-fuel mixture the lambda value of that air-fuel mixture in the main combustion chamber is lower than the lambda value of the air-fuel mixture provided to the main combustion chamber via the at least one intake valve.
1 more element
A method, comprising:
- controlling, via an engine controller, operation of an internal combustion engine, wherein controlling comprises:
- controlling at least one actuator to provide an air-fuel mixture with a lambda value higher than a threshold lambda value to a main combustion chamber via at least one intake valve at a first crank angle before top dead center (TDC) of a piston of the piston-cylinder unit during a compression stroke, wherein the at least one actuator is arranged upstream of at least one intake port or which is arranged in the intake port;
- and
- controlling at least one fuel supply system to provide a fuel comprising hydrogen directly to the main combustion chamber and/or a pre-combustion chamber of a piston-cylinder unit at a second crank angle after the first crank angle before TDC, such that at the time of ignition of the air-fuel mixture the lambda value of that air-fuel mixture in the main combustion chamber is lower than the lambda value of the air-fuel mixture provided to the main combustion chamber via the at least one intake valve.
1 more element
Dependencies are inferred from the claim text.