Patent ID: 7081811
Filing Date: 2006-07-25
Classification: B60H,B60P

Abstract:
1. In a system for signaling a higher than preset interior temperature of a vehicle having a battery including temperature sensors in the vehicle and a control head which activates an alarm when a preset temperature is exceeded, said alarm including activation of one or more of a group of vehicle components consisting of the horn, siren, emergency lights, or headlights, the improvement comprising said control head having a microprocessor connected to said at least two temperature sensors, said temperature sensors widely dispersed in the passenger areas of said vehicle, each of said temperature sensors sending local temperature data to said microprocessor, said microprocessor including algorithms operable to: compute an average of said temperature data from said at least two temperature sensors, compare said average with said preset temperature and activate said alarm when said average exceeds said preset temperature continuously monitor the vehicle battery voltage to determine if a negative rate of change in vehicle battery voltage exists and activating said alarm if said rate exceeds a preset limit, and monitoring each sensor to detect failure in operation, and activating said alarm in the event of sensor failure.