Exhaust aftertreatment system and method
AssigneeBorgWarner Inc.
InventorDavid B. ROTH
Life of this patent
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Abstract
One variation may include a method of controlling exhaust gas flow in an internal combustion engine system, and products and systems using same.
Claims22
A method of exhaust aftertreatment for an internal combustion engine system, which includes an engine with at least one cylinder, each cylinder with divided exhaust gas flow between at least one blowdown exhaust valve and at least one scavenging exhaust valve, and at least one cylinder connected to an exhaust subsystem through a blowdown exhaust valve manifold and a scavenging exhaust valve manifold having the exhaust subsystem in fluid communication with a first catalyst, the exhaust subsystem in communication with the engine, the method comprising:
- communicating exhaust gas from at the blowdown exhaust valve manifold and the scavenging exhaust valve manifold to the first catalyst;
- and
- varying the timing of the at least one blowdown exhaust valve.
A method of controlling the air fuel mixture of exhaust gas entering a catalyst for an engine having at least one cylinder, the cylinder having at least one exhaust valve, wherein the exhaust valve is in fluid communication with the catalyst, the method comprising:
- adjusting the timing of exhaust valve.
An internal combustion engine system, comprising:
- an internal combustion engine including a plurality of cylinders, each having at least one blowdown exhaust valve and at least one scavenging exhaust valve wherein at least one cylinder is connected to an exhaust subsystem to carry exhaust gases away from the engine;
- wherein the exhaust subsystem carries exhaust gases away from the engine, and including a blowdown exhaust manifold in communication with the at least one blowdown exhaust valve of the cylinders connected to the exhaust subsystem, and a scavenging exhaust manifold in communication with the at least one scavenging exhaust valve of the cylinders connected to the exhaust subsystem;
- a first catalyst connected to the exhaust subsystem;
- and
- a controller configured and arranged to adjust the timing of the at least one scavenging exhaust valve or blowdown exhaust valve to control the air fuel mixture of the exhaust gas entering the first catalyst.
An internal combustion engine system, comprising:
- an internal combustion engine including a plurality of cylinders, each having at least one blowdown exhaust valve and at least one scavenging exhaust valve wherein at least one cylinder is connected to an exhaust subsystem to carry exhaust gases away from the engine;
- wherein the exhaust subsystem carries exhaust gases away from the engine, and including a blowdown exhaust manifold in communication with the at least one blowdown exhaust valve of the cylinders connected to the exhaust subsystem, and a scavenging exhaust manifold in communication with the at least one scavenging exhaust valve of the cylinders connected to the exhaust subsystem;
- and
- a first catalyst fluidly connected to the blowdown exhaust manifold.
Dependencies are inferred from the claim text.