Cylinder deactivation system and NOx trap regeneration
AssigneeGeneral Motors Corporation
InventorsGary J. Patterson, Alan William Hayman
Life of this patent
Estimating the term…
Abstract
An engine control system in a vehicle including a variable displacement internal combustion engine, a controller for controlling the displacement of the variable displacement internal combustion engine, an exhaust manifold coupled to the variable displacement internal combustion engine, a NOx trap coupled to the exhaust manifold, and where the controller varies the displacement of the variable displacement internal combustion engine to optimize the regeneration of the NOx trap.
Claims12
An engine control system in a vehicle comprising:
- a variable displacement internal combustion engine;
- a controller for controlling the displacement of said variable displacement internal combustion engine;
- an exhaust manifold coupled to said variable displacement internal combustion engine;
- a NOx trap fluidly coupled to said exhaust manifold;
- and
- wherein said controller varies the displacement of said variable displacement internal combustion engine to optimize the regeneration of said NOx trap.
A method of regenerating an exhaust purification device in a variable displacement internal combustion engine comprising:
- operating the variable displacement internal combustion engine in a partially displaced configuration;
- and
- regenerating the exhaust purification device.
The method of claim 12 wherein the exhaust purification device is a NOx trap and the step of regenerating the exhaust purification device comprises the step of adding a rich fuel mixture to the variable displacement internal combustion engine.
Dependencies are inferred from the claim text.