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US 2022/0055628 A1Published application
Estimating Ambient Air Temperature and Diagnosing Sensor Failure Using Intercooler Efficiency
AssigneePACCAR Inc
InventorsJohn Echlin, Mark Lamont Lott, Christopher William John Mabson
Life of this patent
Estimating the term…
Abstract
Examples of the present disclosure describe systems and methods for determining an estimated ambient air temperature in an environment in which a vehicle is operating. The estimated ambient air temperature may be compared to an ambient temperature sensor value. The comparison may be used to determine whether an ambient air temperature sensor of the vehicle is functioning properly or if an error notification or fault code should be triggered.
Claims20
A system, comprising:
- a processor;
- and
- a memory communicatively coupled to the processor and storing instructions that, when executed by the processor, perform operations, comprising:
- receiving an ambient air temperature reading from an ambient air temperature sensor associated with a vehicle;
- determining a cooling capacity of an intercooler associated with the vehicle;
- determining an ambient air flow rate of the intercooler associated with the vehicle;
- determining a cooling flow rate of the intercooler associated with the vehicle;
- determining an estimated ambient air temperature based, at least in part, on the cooling capacity of the intercooler, the ambient air flow rate of the intercooler and the cooling flow rate of the intercooler;
- determining a difference between the ambient air temperature reading and the estimated ambient air temperature;
- and
- triggering an error notification for the vehicle when the determined difference between the ambient air temperature reading and the estimated ambient air temperature is above a threshold.
8 more elements
A method, comprising:
- receiving an ambient air temperature reading from an ambient air temperature sensor associated with a vehicle;
- determining an estimated ambient air temperature based, at least in part, on:
- a determined cooling capacity of an intercooler associated with the vehicle;
- a determined ambient air flow rate of the intercooler;
- and
- a determined cooling flow rate of the intercooler;
- determining a difference between the ambient air temperature reading and the estimated ambient air temperature;
- and
- triggering an error notification for the vehicle when the determined difference between the ambient air temperature reading and the estimated ambient air temperature is above a threshold.
6 more elements
A method, comprising:
- determining whether a set of vehicle operating conditions are satisfied;
- and
- when the set of vehicle operating conditions are satisfied:
- receiving an ambient air temperature reading from an ambient air temperature sensor associated with a vehicle;
- determining an estimated ambient air temperature based, at least in part, on:
- a determined cooling capacity of an intercooler associated with the vehicle;
- a determined ambient air flow rate of the intercooler;
- and
- a determined cooling flow rate of the intercooler;
- determining a difference between the ambient air temperature reading and the estimated ambient air temperature;
- and
- triggering an error notification for the vehicle when the determined difference between the ambient air temperature reading and the estimated ambient air temperature is above a threshold.
9 more elements
Dependencies are inferred from the claim text.