US 12,473,870 B2
Internal combustion engine and method for operating an internal combustion engine
Nikolaus Spyra, Innsbruck (AT)
Assigned to Innio Jenbacher GmbH & Co OG, Jenbach (AT)
Appl. No. 18/688,347
Filed by INNIO Jenbacher GmbH & Co OG, Jenbach (AT)
PCT Filed Sep. 3, 2021, PCT No. PCT/AT2021/060308
§ 371(c)(1), (2) Date Feb. 29, 2024,
PCT Pub. No. WO2023/028625, PCT Pub. Date Mar. 9, 2023.
Prior Publication US 2024/0352904 A1, Oct. 24, 2024
Int. Cl. F02D 41/40 (2006.01); F02B 19/10 (2006.01); F02D 19/02 (2006.01); F02D 41/00 (2006.01); F02D 41/30 (2006.01); F02M 21/02 (2006.01); F02D 41/38 (2006.01)
CPC F02D 41/40 (2013.01) [F02B 19/1023 (2013.01); F02B 19/1085 (2013.01); F02D 19/024 (2013.01); F02D 41/0047 (2013.01); F02D 41/3094 (2013.01); F02M 21/0206 (2013.01); F02M 21/0275 (2013.01); F02M 21/0278 (2013.01); F02B 19/1019 (2013.01); F02D 2041/389 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.