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US 6,857,264 B2Granted
Exhaust emission aftertreatment
AssigneeGeneral Motors Corporation
InventorFrank Ament
Life of this patent
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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, and where the controller operates the variable displacement internal combustion engine in a partially displaced operating mode upon startup to increase exhaust gas temperature.
Claims8
An engine control system in a vehicle comprising:
- a variable displacement internal combustion engine;
- a controller for controlling the displacement of said variable displacement compression ignition internal combustion engine;
- a NOX trap coupled to the exhaust of said variable displacement internal combustion engine,
- wherein said controller operates said variably displacement internal combustion engine in a partially displaced operating mode upon startup to increase exhaust gas temperature;
- wherein said controller deactivates a portion of the cylinders in the variable displacement internal combustion engine;
- wherein fuel is injected into said deactivated cylinders to generate partial oxidation products;
- and
- wherein said partial oxidation products are released into the exhaust of said variable displacement internal combustion engine to regenerate said NOx trap.
5 more elements
A method of controlling a variable displacement diesel internal combustion engine comprising:
- operating the variable displacement diesel internal combustion engine in a partially displaced operating mode;
- injecting fuel in deactivated cylinders in said variable displacement internal combustion engine to generate partial oxidation products;
- and
- releasing said partial oxidation products into an exhaust stream of said variable displacement diesel internal combustion engine to regenerate a catalytic device.
1 more element
Dependencies are inferred from the claim text.