Patent ID: 8788223
Filing Date: 2014-07-22
Classification: B60H,G01R,H02H,H05B

Abstract:
1. A heating system for a vehicle, the system comprising: a heating control module comprising a microprocessor configured for heating fault detection and heating fault handling, a first field effect transistor (FET) operatively connected to the microprocessor, and a second field effect transistor (FET) operatively connected to the microprocessor; and a heating module comprising a heating element, a first thermistor operatively connected to the microprocessor, and a second thermistor operatively connected to the microprocessor; wherein the microprocessor is configured to: determine a fault condition when a temperature difference between a first temperature of the first thermistor and a second temperature of the second thermistor exceeds a temperature difference threshold; determine the fault condition when at least one of the first temperature of the first thermistor and the second temperature of the second thermistor is less than a minimum temperature after the first FET is powered on and the second FET is powered on; determine the fault condition when the first FET is powered on and the second FET is powered off and when the microprocessor does not detect logic voltage at an analog input; and determine the fault condition when the first FET is powered off and the second FET is powered off and when the microprocessor does not detect half the logic voltage at the analog input.