Method and Device for Controlling Distance

• US 20070232448A1
• Filed: 09/25/2004
• Published: 10/04/2007
• Est. Priority Date: 10/25/2003
• Status: Abandoned Application

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Linden, Thomas
• Application Number:
  US10/577,092
• Publication Number:
  US 20070232448A1
• Time in Patent Office: Days
• US Class Current: 477/183
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60W 2050/0025 Transfer function weighting factor
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/93185 Controlling the brakes
• CPC Class Codes: G01S 2013/932 using own vehicle data, e.g. ground speed, steering wheel direction
• CPC Class Codes: G01S 2013/9322 using additional data, e.g. driver condition, road state or weather data
• CPC Class Codes: G01S 2013/9325 for inter-vehicle distance regulation, e.g. navigating in platoons

Abstract

A method and a device for performing inter-vehicle distance control on a vehicle, an actual value (d_act) of a distance variable which describes a distance between the vehicle and a vehicle traveling in front being determined, is provided. A plurality of weighting values (g_i) for the distance variable are determined as a function of input variables (x_i) which describe the driving situation of the vehicle and/or the ambient situation of the vehicle and/or the driving behavior of the driver. From the weighting values in turn a set point value (d_setp) for the distance variable is determined, a braking device and/or driving device of the vehicle being actuated in such a way that the determined actual value (d_act) of the distance variable assumes the determined set point value (d_setp). In order to determine the set point value (d_setp) of the distance variable the weighting values (g_i) are multiplied by one another.

Claims

1-7. -7. (canceled)

8. A method for performing inter-vehicle distance control on a vehicle comprising:

determining an actual value of a distance variable describing a distance between the vehicle and a vehicle traveling in front;

determining a plurality of weighting values for the distance variable as a function of input variables describing a driving situation of the vehicle and/or an ambient situation of the vehicle and/or a driving behavior of a driver and determining a set point value for the distance variable as a function of the input variables

actuating a brake and/or driving device of the vehicle so that the determined actual value of the distance variable assumes the determined set point value of the distance variable; and

multiplying the weighting values by one another to determine the set point value of the distance variable.

9. The method as claimed in claim 8 wherein to determine the set point value of the distance variable a geometric average of the weighting values is formed.

10. The method as claimed in claim 8 wherein to determine the set point value of the distance variable the multiplied weighting values are restricted to a predefined value range.

11. The method as claimed in claim 10 wherein the value range is defined by predefining an upper and a lower limiting value for the multiplied weighting values, the limiting values being predefined as a function of driving state variables describing the driving state of the vehicle.

12. The method as claimed in claim 8 wherein the multiplied weighting values for determining the set point value of the distance variable are multiplied by a predefined reference value for the distance variable, the reference value being predefined as a function of driving state variables describing the driving state of the vehicle.

13. The method as claimed in claim 11 further comprising issuing a driver warning to the driver of the vehicle if the determined actual value of the distance variable drops below the set point value of the distance variable given by the lower limiting value of the multiplied weighting values.

14. A device for performing inter-distance control on a vehicle comprising:

an evaluation unit determining an actual value of a distance variable describing a distance between the vehicle and a vehicle traveling in front, the evaluation unit determining a plurality of weighting values for the distance variable as a function of input variables describing a driving situation of the vehicle and/or an ambient situation of the vehicle and/or a driving behavior of a driver, the evaluation unit in turn determining as a function of the weighting values a set point value for the distance variable, the evaluation unit actuating a brake and/or driving device of the vehicle so that the determined actual value of the distance variable assumes the determined set point value of the distance variable, and to determine the set point value of the distance variable the evaluation unit multiplies the weighting values by one another.