Systems and methods for modelling aftertreatment temperature of a vehicle
AssigneeFord Global Technologies, LLC
InventorsTom Leroy, Owen Lineham, Mike Rowland
Life of this patent
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Abstract
Methods and systems are provided for model-based determination of a temperature distribution of an exhaust aftertreatment system of a vehicle. A power demand from a first component of the aftertreatment system is measure, a heat transfer into the first component of the aftertreatment system based on power demand of the first component and a configurable emissivity value of the exhaust gas is determined, and the temperature of the first component based on the calculated heat transfer is calculated.
Claims18
A method for model-based determination of heat transfer in an exhaust aftertreatment system of a vehicle, the method comprising:
- measuring a power demand from a first component of the aftertreatment system;
- calculating a heat transfer into the first component of the aftertreatment system based on power demand of the first component and a configurable emissivity value of the exhaust gas, wherein the emissivity value of the exhaust gas is configured in response to determining that an internal combustion engine, ICE, of the vehicle is on and a secondary airflow is on;
- determining if the ICE of the vehicle is on and a secondary airflow is off;
- and
- in response to determining that the ICE is on and secondary airflow is off, configuring the emissivity value of the exhaust gas based on an air-fuel ratio, corrected for a pressure and a temperature of the aftertreatment system.
An after-treatment system of a vehicle comprising:
- an electrically heated catalyst, eCAT, electrically coupled to a power source;
- and
- a controller, communicatively coupled to the eCAT and the power source, the controller configured to:
- measure a power demand of the eCAT from the power source;
- monitor an ambient temperature of the vehicle;
- calculate a heat transfer into the eCAT of the aftertreatment system based on the power demand of the eCAT, the ambient temperature of the vehicle, and a configurable emissivity value of the exhaust gas, wherein the emissivity value of the exhaust gas is configured in response to determining that an internal combustion engine, ICE, of the vehicle is on and a secondary airflow is on;
- determine if the ICE of the vehicle is on and a secondary airflow is off;
- and
- in response to determining that the ICE is on and secondary airflow is off, configure the emissivity value of the exhaust gas based on an air-fuel ratio, corrected for a pressure and a temperature of the aftertreatment system.
A method for model-based determination of heat transfer of an exhaust aftertreatment system of a vehicle, the method comprising:
- measuring a power demand from a first component of the aftertreatment system;
- and
- calculating a heat transfer into the first component of the aftertreatment system based on power demand of the first component and a configurable emissivity value of the exhaust gas, wherein the emissivity value of the exhaust gas is configured in response to determining that an internal combustion engine, ICE, of the vehicle is on and a secondary airflow is off.
Dependencies are inferred from the claim text.