Vehicle navigation system with improved powerup performance
US6059843A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1999 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Aug 19, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.