초록 ▼

A navigation system includes a driver presence sensor and engine running detection circuitry. When the detection circuitry determines that the engine of the vehicle is not running, the navigation system enters a low power mode. When the presence of the driver is detected, the navigation system begin

A navigation system includes a driver presence sensor and engine running detection circuitry. When the detection circuitry determines that the engine of the vehicle is not running, the navigation system enters a low power mode. When the presence of the driver is detected, the navigation system begins power up, switching from a low power to a full power operational mode. If the detection circuitry does not determine that the engine is running within a predetermined time period, the navigation system reenters the low power mode. The detection circuitry monitors the vehicle's electrical system and determines that the engine is running when an AC content exceeds a predetermined threshold.

대표청구항 ▼

[ What is claimed is:] [1.] A method for operating a vehicle navigation system including the steps of:a) placing the navigation system in a low power mode while an engine of the vehicle is not running;b) monitoring an AC component of a power supply of the vehicle while the navigation system is in th

[ What is claimed is:] [1.] A method for operating a vehicle navigation system including the steps of:a) placing the navigation system in a low power mode while an engine of the vehicle is not running;b) monitoring an AC component of a power supply of the vehicle while the navigation system is in the low power mode;c) determining whether the engine is running based upon said step b); andd) switching the navigation system from the low power mode to an operating mode based upon a determination in said step c) that the vehicle engine is running.