Failsafe parking assistance system

• US 20100217488A1
• Filed: 09/18/2007
• Published: 08/26/2010
• Est. Priority Date: 10/17/2006
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Nijakowski, Klaus-Dieter, Messner, Heiner
• Granted Patent: US 9,511,756 B2
• Time in Patent Office: Days
• US Class Current: 701/48
• CPC Class Codes: B60T 17/221 Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M
• CPC Class Codes: B60T 2201/10 Automatic or semi-automatic parking aid systems
• CPC Class Codes: B60T 2270/402 Back-up
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/06 Automatic manoeuvring for parking
• CPC Class Codes: B60W 50/029 Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts

Abstract

A method is described for protecting a parking assistance system from a failure of the service brake system. In order to prevent a collision of the vehicle with a surrounding object, the function of the service brake system is monitored and if an error is present, at least one other vehicle system, such as an automatic transmission or an automatic parking brake, is activated in order to brake the vehicle and/or interrupt the transmission of drive torque to the wheels.

Claims

1-8. -8. (canceled)

9. A method for protecting a parking assistance system from an error of the service brake system, the method comprising:

monitoring a functioning of the service brake system for an error; and

activating, if the error is present, another vehicle system to at least one of brake the vehicle and interrupt a transmission of drive torque to wheels of the vehicle.

10. The method of claim 9, wherein, in a vehicle equipped with an automatic parking brake, an actuator of the parking brake is activated in order to apply the brake.

11. The method of claim 9, wherein, in a vehicle equipped with an automatic transmission, a gear position selector is activated to select park position “

P”

.

12. The method of claim 11, wherein park position “

P”

is selected only if the driving speed is lower than a specified maximum speed.

13. The method of claim 9, wherein, in a vehicle equipped with automatic transmission, a gear position selector is activated to set idling position “

N” and

thus interrupt the drive train.

14. The method of claim 9, wherein the function of the control unit of the service brake system is monitored.

15. A parking assistance system, comprising:

a control unit having a parking assistance algorithm;

a sensor system for scanning surroundings of the vehicle; and

an actuator of the service brake system;

wherein the parking assistance algorithm is for protecting a parking assistance system from an error of the service brake system, by performing the following;

monitoring a functioning of the service brake system for an error; and

activating, if the error is present, another vehicle system to at least one of brake the vehicle and interrupt a transmission of drive torque to wheels of the vehicle.

16. A control unit to protect a parking assistance system, comprising:

a parking assistance arrangement which is configured to protect the parking assistance system from an error of the service brake system, by performing the following;

monitoring a functioning of the service brake system for an error; and

activating, if the error is present, another vehicle system to at least one of brake the vehicle and interrupt a transmission of drive torque to wheels of the vehicle.