Method and system for controlling exhaust gases emitted from an internal combustion engine
AssigneeDetroit Diesel Corporation
InventorsMin Sun, Zornitza Pavlinova Pavlova-MacKinnon, Kevin Sisken
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Abstract
Method, system, and controller for controlling oxygen levels in exhaust gases as a function of soot burn rates of a particulate filter so as to facilitate regeneration of the particulate filter. The method, system, and controller being applicable in systems having an engine which emits exhaust gases having particulates which are captured by the particulate filter.
Claims20
A method for controlling oxygen levels in exhaust gases emitted from an internal combustion engine having a particulate filter in fluid communication with the emitted exhaust gases to capture particulates, the method comprising:
- controlling oxygen levels in the exhaust gases as a function of a soot burn rate of the particulate filter during regeneration by controlling an amount of cooled exhaust gas recirculated to the engine from an exhaust gas recirculation (EGR) cooled passage, the cooled passage having an air cooler to cool the recirculated exhaust gases.
A method for controlling oxygen levels in exhaust gases emitted from an internal combustion engine to prevent an uncontrolled soot burn condition in a particulate filter during regeneration, the particulate filter being in fluid communication with the emitted exhaust gases to capture particulates, the method comprising:
- monitoring soot burn rates of the particulate filter during regeneration;
- and
- controlling oxygen levels in the exhaust gases as a function of the soot burn rates so as to prevent the uncontrolled soot burn condition by controlling an amount of cooled and non-cooled exhaust gas recirculated to the engine through an exhaust gas recirculation (EGR) cooled passage and a EGR cooler bypass.
A method of controlling exhaust gas temperatures of exhaust gases emitted from an internal combustion engine having a particulate filter in fluid communication with the emitted exhaust gases to capture particulates and an exhaust gas recirculation (EGR) cooler and cooler bypass in communication therewith for respecting recirculating cooled and non-cooled exhaust gases thereto, the method comprising:
- determining a desired exhaust gas temperature;
- and
- controlling exhaust gas recirculation through the EGR cooler and cooler bypass as a function of the desired exhaust gas temperature.
Dependencies are inferred from the claim text.