Method for operating a navigation system for a vehicle

US6711498B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Stefan Lau · Giesen, DE
• Heinrich Schmidt · Düsseldorf, DE
• Ralf Hoffmann

Key dates

• Filing date: Jul 12, 2002
• Grant date: Mar 23, 2004
• Expiry date: Jul 12, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G08G1/096872
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method for operating a navigation system for a vehicle, particularly for a motor vehicle, in which a travel route is calculated in a computing circuit on the basis of a location of the vehicle, a digitally stored map and a destination location, and is made available to the vehicle driver as an acoustical and/or visual message, where traffic information relevant to the travel route may be acquired via a receiver unit and a new travel time t resulting therefrom is calculated for the existing travel route with the aid of a predefined weighting factor Gf for a disturbance event and the length of a traffic disturbance Ls, and a travel time ta is calculated in the same manner for an alternative route, and in the event that the travel time ta of the alternative route is shorter than the travel time t of the travel route, is indicated to the vehicle driver. A correction value K for the weighting factors Gf is ascertained on the basis of the length of the traffic disturbance Ls, and a corrected weighting factor Gk is ascertained as a function of the correction value Kw and is used for calculating the new travel time t.