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US 10,473,011 B2Granted
Particulate filter regeneration system and method
AssigneeFord Global Technologies, LLC
InventorsEric Matthew Kurtz, Paul Joseph Tennison
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for regenerating a particulate filter of a vehicle. In one example, a method may include, during a non-engine operating condition, regenerating a particulate filter coupled in an exhaust system downstream of an engine by activating an electric heater of the particulate filter and directing intake air through the particulate filter, the intake air bypassing the engine, and adjusting an electrical load of the electric heater responsive to one or more of exhaust temperature and intake airflow.
Claims18
A method, comprising:
- during a non-engine operating condition, regenerating a particulate filter coupled in an exhaust system downstream of an engine by activating an electric heater of the particulate filter and directing intake air from an intake system of the engine through the particulate filter via a controller, the intake air bypassing the engine;
- determining a target particulate filter temperature during the regenerating based on output from an intake air mass flow sensor via the controller;
- and
- adjusting an electrical load of the electric heater during the regenerating based on the output from the intake air mass flow sensor via the controller.
1 more element
A method, comprising:
- during a first condition where an engine is operating, adjusting an engine fuel injection amount based on at least a sensed intake air mass flow via a controller, the sensed intake air mass flow sensed by an engine intake air mass flow sensor;
- and
- during a second condition where the engine is not operating, adjusting one or more of an intake air flow through a particulate filter located in an exhaust system and an electrical load of an electric heater coupled to the particulate filter via the controller based on at least the sensed intake air mass flow, wherein adjusting one or more of the intake air flow through the particulate filter and the electrical load of the electric heater based on the sensed intake air mass flow comprises determining a target particulate filter temperature as a function of the sensed intake air mass flow and adjusting the electrical load of the electric heater to reach the target particulate filter temperature.
A method, comprising:
- during an engine operating condition, flowing intake air past a mass airflow sensor to an engine and adjusting at least one engine operating parameter based on an output of the mass airflow sensor via a controller;
- and
- during a non-engine operating condition, regenerating a particulate filter coupled in an exhaust system downstream of the engine by flowing the intake air past the mass airflow sensor and through the particulate filter via the controller, the intake air bypassing the engine, while adjusting an electrical load of an electric heater coupled to the particulate filter based on the output of the mass airflow sensor.
Dependencies are inferred from the claim text.