Method for the Cruise and/or Range Control of Motor Vehicles

• US 20140257665A1
• Filed: 06/04/2013
• Published: 09/11/2014
• Est. Priority Date: 03/05/2013
• Status: Abandoned Application

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: KAGERER, Walter, LAIOU, Maria-Christina
• Application Number:
  US13/909,279
• Publication Number:
  US 20140257665A1
• Time in Patent Office: Days
• US Class Current: 701/96
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60W 2552/05 Type of road, e.g. motorways, local streets, paved or unpaved roads
• CPC Class Codes: B60W 2552/10 Number of lanes
• CPC Class Codes: B60W 2554/801 Lateral distance
• CPC Class Codes: B60W 2554/804 Relative longitudinal speed
• CPC Class Codes: B60W 2555/60 Traffic rules, e.g. speed limits or right of way
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle

Abstract

A method for cruise and/or range control of motor vehicles with range-controlled cruise control systems, wherein, during a determination of a desired acceleration value, for reaching a predefined speed and/or a predefined distance to a target object traveling ahead during a following travel, specific data of a target object traveling ahead and of a front object traveling in front of the target object are taken into account. As a function of the specific data of the target object driving ahead, a first desired pre-acceleration value is determined and, as a function of the specific data of the front object driving ahead, a second desired pre-acceleration value is determined. From the first desired pre-acceleration value and the second desired pre-acceleration value, by weighting the two desired pre-acceleration values, the relevant desired acceleration value is determined.

Claims

1. A method of operating a range-controlled cruise control system of a motor vehicle, the method comprising the acts of:

as a function of specific data of a target object driving ahead, determining a first desired pre-acceleration value for achieving a predefined distance with respect to the target object driving ahead;

as a function of specific data of a front object driving ahead, which front object is traveling in front of the target object, determining a second desired pre-acceleration value for achieving a predefined distance with respect to the front object driving ahead;

determining a desired acceleration value for the motor vehicle from the first desired pre-acceleration value and the second desired pre-acceleration value by weighting the first and second desired pre-acceleration values; and

outputting a torque demand based on the desired acceleration value to a drive unit or a brake unit of the motor vehicle.

2. The method according to claim 1, wherein the desired acceleration value is determined by a situational weighting of the first desired pre-acceleration value and the second desired pre-acceleration value.

3. The method according to claim 2, wherein the situational weighting is carried out as a function of at least one of:

a preceding sign of the first and second desired pre-acceleration values, an amount of the first and second desired pre-acceleration values, a function of at least one of speed and environmental conditions of the motor vehicle, and a function of information concerning other traffic participants.

4. The method according to claim 1, wherein if one of the first and second desired pre-acceleration values is positive and the other is negative, the weighting of the first and second desired pre-acceleration values is carried out such that a negative desired pre-acceleration value is determined.

5. The method according to claim 2, wherein if one of the first and second desired pre-acceleration values is positive and the other is negative, the weighting of the first and second desired pre-acceleration values is carried out such that a negative desired pre-acceleration value is determined.

6. The method according to claim 3, wherein if one of the first and second desired pre-acceleration values is positive and the other is negative, the weighting of the first and second desired pre-acceleration values is carried out such that a negative desired pre-acceleration value is determined.