Method and system for controlling fuel included within exhaust gases to facilitate regeneration of a particulate filter
AssigneeDetroit Diesel Corporation
InventorsMin Sun, Zornitza Pavlova-MacKinnon, Kevin Sisken
Life of this patent
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Abstract
Method, system, and controller for controlling fuel included within exhaust gases to facilitate regeneration of a 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.
Claims19
A method of determining an amount of fuel to include within exhaust gases to facilitate regeneration of a particulate filter, the particulate filter being in fluid communication with an engine to capture particulates emitted in exhaust gases therefrom, the method comprising:
- determining a first fuel injection value as a function of an open loop fuel injection control strategy;
- determining a second fuel injection value as a function of a closed loop fuel injection control strategy;
- adjusting the first fuel injection value as a function of the second fuel injection value;
- determining a third fuel injection value as function of an open loop emissions fuel injection control strategy;
- and
- determining the amount of fuel to include within the exhaust gases to facilitate regeneration of the particulate filter as a function of the adjusted first fuel injection value and the third fuel injection value.
A method of determining an amount of fuel to include within exhaust gases to facilitate regeneration of a particulate filter having an oxidation catalyst (OC), the particulate filter being in fluid communication with an engine to capture particulates emitted in exhaust gases therefrom, the method comprising:
- controlling fuel included within the exhaust gases during regeneration of the particulate filter according to an open loop control strategy, the open loop control strategy determining an amount of fuel to include within the exhaust gases as a function of exhaust gas mass flow rate to the particulate filter assembly and exhaust gas temperature at an inlet to the OC;
- and
- adjusting the amount of fuel included within the exhaust gases according to a closed loop control strategy, the closed loop control strategy employing a sensor to sense OC outlet temperatures and adjusting the amount of fuel included within the exhaust gases as a function of the sensed OC outlet temperatures being corrected to compensate for sensor delay and a difference between the corrected OC outlet temperature and a desired OC outlet temperature, the desired OC outlet temperature associated with temperatures desired to facilitate regeneration of the particulate filter.
A controller for controlling fuel injected from a doser to a particulate filter assembly having an oxidation catalyst (OC) to facilitate regeneration of particulates emitted from an internal combustion engine and captured by a particulate filter, the controller configured for:
- controlling the doser to inject fuel during regeneration of the particulate filter according to an open loop control strategy;
- and
- adjusting the amount of fuel injected from the doser according to a closed loop control strategy.
Dependencies are inferred from the claim text.