Switching a turn signal indicator on or off

• US 20040143381A1
• Filed: 11/05/2003
• Published: 07/22/2004
• Est. Priority Date: 11/05/2002
• Status: Abandoned Application

• Current Assignee: DaimlerChrysler AG (Mercedes-Benz Group AG)
• Original Assignee: DaimlerChrysler AG (Mercedes-Benz Group AG)
• Inventors: Woltermann, Bernd, Regensburger, Uwe
• Application Number:
  US10/700,675
• Publication Number:
  US 20040143381A1
• Time in Patent Office: Days
• US Class Current: 701/36
• CPC Class Codes: B60Q 1/346 with automatic actuation
• CPC Class Codes: B60Q 1/381 with several light sources activated in sequence, e.g. to create a sweep effect
• CPC Class Codes: B60Q 1/40 having mechanical, electric or electronic automatic return to inoperative position
• CPC Class Codes: G01C 21/3602 Input other than that of destination using image analysis, e.g. detection of road signs, lanes, buildings, real preceding vehicles using a camera

Abstract

A method of automatically switching a turn indicator on a vehicle on or off, whereby ambient data about the vehicle is detected for determining the location of the vehicle. On the basis of this ambient data, changes in lane and/or direction of travel are determined. Before a change in lane or direction of travel, the turn indicator is turned on and turned off after changing lanes and/or direction of travel.

Claims

1. A method of automatically switching a turn indicator on a vehicle on or off, comprising the steps of:

detecting ambient data about the vehicle for determining the location of the vehicle,

determining on the basis of the ambient data, at least one of lane changing and direction changing information, and

switching on the turn indicator before changing one of lanes and directions and switching off the turn indicator after changing one of lanes and directions.

2. The method as claimed in claim 1, wherein

lane recognition is performed on the basis of the ambient data about the vehicle by determining the position of the vehicle in the lane,

the position of the vehicle is calculated in advance for a preselectable route length,

the position calculated in advance is used to determine whether a lane border of the lane has been completely or partially crossed,

the turn indicator is turned on when complete or partial crossing of the lane is detected.

3. The method as claimed in claim 1, wherein a lane recognition is performed on the basis of the ambient data about the vehicle in order to determine the position of the vehicle in the lane, and wherein the turn indicator is automatically turned off after completely or partially crossing a lane border of the lane.

4. The method as claimed in claim 2 wherein

an offset value (OS) is determined which corresponds to the deviation of a center of the lane being driven on instantaneously from the longitudinal axis of the vehicle, and

crossing of the lane border of the lane is recognized by an increase in amount and a subsequent decline in the offset value (OS) combined with a change in direction of the offset value (OS).

5. The method as claimed in claim 1 wherein the detection of ambient data includes recognition of at least one of direction arrows on a road surface and traffic signs, and wherein the turn indicator is automatically turned on in accordance with the direction of travel as indicated by the direction arrow recognized.

6. The method as claimed in claim 1 wherein

the detection of ambient data includes a recognition of objects in an adjacent lane beside the vehicle,

at least one of distance and relative speed in relation to a vehicle in front is detected, and

if the adjacent lane is free, the turn indicator is switched on when at least one of the distance from the vehicle in front falls below a distance threshold value and the relative speed in relation to the vehicle in front exceeds a relative speed threshold value.

7. The method as claimed in claim 1 wherein a point in time of automatically turning the turn indicator on or off before or after changing lanes or direction of travel during operation of the vehicle is altered as a function of a second point in time before or after a change in lane or direction of travel as selected by the driver in manually turning the turn indicator on or off.

8. The method as claimed in claim 1 wherein,

the detection of ambient data includes satellite-supported vehicle position detection,

determination of the lane or road being driven on the basis of a digital map and the vehicle position, and

turning the turn indicator on or off according to the course of the lane or road ahead.

9. The method as claimed in claim 8, wherein, after the driver has repeatedly turned the turn indicator on or off when the vehicle is in essentially the same location, the turn indicator is automatically turned on or off on reaching said same location of the vehicle.

10. The method as claimed in claim 8 wherein, when the turn indicator is manually turned on or off by the driver in a first location of the vehicle, the distance between the first location of the vehicle and the second location of the vehicle reached at the time when the vehicle changes lanes or direction of travel is determined and the time when the turn indicator is automatically turned on or off is varied as a function of the distance that is determined.

11. The method as claimed in claim 10, wherein at least one of a first vehicle location when the turn indicator is manually turned on or off by the driver is stored and the distance between the first location of the vehicle and a second location of the vehicle is stored in the digital map.

12. A method of automatically controlling operation of a vehicle turn signal indicator comprising the steps of:

detecting the environment of said vehicle,

determining the orientation of said vehicle relative to said environment, and

changing a state of operation of said turn signal indicator as a function of said orientation.

13. The method according to claim 12 wherein the environment of said vehicle includes information covering a surface being traveled by said vehicle.

14. The method according to claim 12 wherein the orientation includes a position of said vehicle on a surface being traveled.

15. The method according to claim 14 wherein the orientation further includes a determination of boundaries of said surface.

16. The method according to claim 15 wherein said boundaries includes sides of the road and lane markings.

17. The method according to claim 12 wherein said orientation includes at least one of a speed of said vehicle relative to a preceding vehicle, a distance between said vehicle and a preceding vehicle, and a determination of a partial or complete lane change.