Longitudinally guiding driver assistance system in a motor vehicle

• US 10,549,754 B2
• Filed: 07/07/2016
• Issued: 02/04/2020
• Est. Priority Date: 07/14/2015
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Knoller, Stefan, Mathieu, Sebastien, Schmitt, Florian
• Primary Examiner(s): Boomer, Jeffrey C
• Application Number:
  US15/204,078
• Publication Number:
  US 20170015320A1
• Time in Patent Office: 1,307 Days
• CPC Class Codes: B60K 2310/244 changing target speed or setting a new target speed, e.g. changing algorithms
• CPC Class Codes: B60K 31/00 Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator fittings acting on two or more sub-units B60W30/14; speedometers G01P; systems or devices for controlling speed in general G05D13/00 ; in traffic anti-collision system for road vehicles G08G1/16
• CPC Class Codes: B60W 2540/215 Selection or confirmation of options
• CPC Class Codes: B60W 2552/00 Input parameters relating to infrastructure
• 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 30/146 Speed limiting
• CPC Class Codes: B60W 40/04 Traffic conditions
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention

Abstract

A longitudinally guiding driver assistance system in a motor vehicle includes a detection system for detecting currently applying events and relevant events lying ahead, which require an adaptation of the permissible maximum speed, and a function unit which, when detecting a relevant event, while taking into account the location of the relevant event lying ahead, determines a location-dependent point in time, whose reaching causes the function unit to initiate an output of prompt information for permitting an automatic adaptation of the currently permissible maximum speed to a new permissible maximum speed. The function unit is designed, in the case of an activation of the longitudinally guiding driver assistance system, while taking into account a detected currently applying event, to initiate a first output of prompt information for permitting an automatic first setting of the currently applying permissible maximum speed as the new permissible maximum speed.

Claims

1. A longitudinally guiding driver assistance system in a motor vehicle, comprising:

a driving unit and a braking unit, together configured to control the motor vehicle speed according to a permissible maximum speed;

a detection system comprising a navigation system and/or a camera, wherein the detection system is configured to detect current events and relevant events ahead of the motor vehicle, which events require adapting the permissible maximum speed; and

a microprocessor communicatively coupled to the driving unit, the braking unit, and the detection system, the microprocessor configured to;

upon detection of a relevant event ahead of the motor vehicle, while taking into account a location of the relevant event, determine a location-dependent point in time,

upon reaching the location-dependent point in time, initiate an output of prompt information for permitting an automatic adaptation of a currently permissible maximum speed to a first new permissible maximum speed,

upon activation of the longitudinally guiding driver assistance system, while taking into account a detected current event, initiate a first output of a prompt whose acceptance by the user permits an automatic first setting of the currently permissible maximum speed to the first new permissible maximum speed,

upon activation of the longitudinally guiding driver assistance system and in response to determining that a detected further relevant event ahead of the motor vehicle would require subsequently adapting the permissible maximum speed to a second new permissible maximum speed that is lower than the first new permissible maximum speed resulting from permitting the first setting, suppress the initiation of the first output of the prompt,

upon activation of the longitudinally guiding driver assistance system and in response to determining that a current speed is lower than the second new permissible maximum speed, suppress the initiation of the first output of the prompt, and

signal the driving unit and/or the braking unit to control the motor vehicle speed in accordance with the second new permissible maximum speed.

2. The longitudinally guiding driver assistance system according to claim 1, wherein the microprocessor is further configured to initiate the first output of the prompt after a predefined time interval and/or route interval from the activation of the longitudinally guiding driver assistance system.

3. The longitudinally guiding driver assistance system according to claim 1, wherein the microprocessor initiates the first output of the prompt while taking into account the detected relevant event that requires adapting the permissible maximum speed.

4. The longitudinally guiding driver assistance system according to claim 1, wherein the relevant event and the further relevant event are each detectable as a function of a respective permitted determined deceleration strategy for reaching the respective new first or second permissible maximum speed.

5. The longitudinally guiding driver assistance system according to claim 4, wherein the relevant event lying ahead is detectable as a function of a permitted acceleration strategy for reaching the new permissible maximum speed determined based on the currently applicable event.

6. The longitudinally guiding driver assistance system according to claim 1, wherein the relevant event and the further relevant event are each detectable as a function of a respective permitted acceleration strategy for reaching the respective new first or second permissible maximum speed.

7. A longitudinally guiding driver assistance system in a motor vehicle, comprising:

a driving unit and a braking unit, together configured to control a current speed of the motor vehicle speed according to a set maximum speed;

a detection system comprising a navigation system and/or a camera, wherein the detection system is configured to detect current events and relevant events ahead of the motor vehicle, which events require adapting the maximum speed; and

a microprocessor communicatively coupled to the driving unit, the braking unit, and the detection system, the microprocessor configured to;

determine a first point-in-time at which to potentially output a first prompt to a user of the motor vehicle, the first prompt suggesting the maximum speed be set to a first speed,

determine, based on a detected relevant event ahead, a second point-in-time at which to potentially output a second prompt to the user, the second prompt suggesting the maximum speed be set to a second speed,

output the first prompt to the user upon reaching the first point-in-time,

suppress outputting the first prompt in response to determining that the second speed is lower than the first speed,

suppress outputting the first prompt in response to determining that the second speed is greater than the current speed, and

set the maximum speed to the first speed in response to the first prompt being accepted by the user,

signal the driving unit and/or braking unit to control the current speed in accordance with the maximum speed.