PACCAR Inc
Estimating Ambient Air Temperature and Diagnosing Sensor Failure Using Intercooler Efficiency

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.