Failsafe parking assistance system
First Claim
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1. A method for protecting a parking assistance system in a vehicle, which also includes a service brake system, from an error of the service brake system, the method comprising:
- monitoring, via a control unit of the service brake system, a functioning of a hydraulic power unit of the service brake system for an error while performing a parking assistance using the service brake system; and
issuing, via the control unit of the service brake system, a request in immediate response to detecting the error, which request causes one of a control unit of an automatic transmission system and a control unit of an automatic parking brake to issue a first command that activates the automatic transmission system to interrupt a transmission of drive torque to wheels of the vehicle by controlling a gear position selector to select a different gear position; and
monitoring, via at least one of the control unit of the automatic transmission system and the control unit of the automatic parking brake, a functioning of the control unit of the service brake system to determine whether the control unit of the service brake system is functional, wherein the monitoring of the functioning of the control unit of the service brake system is performed together with the monitoring of the functioning of a hydraulic power unit of the service brake system; and
issuing, via at least one of the control unit of the automatic transmission system and the control unit of the automatic parking brake, the first command in response to detecting that the control unit of the service brake system is no longer functional.
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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.
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Citations
14 Claims
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1. A method for protecting a parking assistance system in a vehicle, which also includes a service brake system, from an error of the service brake system, the method comprising:
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monitoring, via a control unit of the service brake system, a functioning of a hydraulic power unit of the service brake system for an error while performing a parking assistance using the service brake system; and issuing, via the control unit of the service brake system, a request in immediate response to detecting the error, which request causes one of a control unit of an automatic transmission system and a control unit of an automatic parking brake to issue a first command that activates the automatic transmission system to interrupt a transmission of drive torque to wheels of the vehicle by controlling a gear position selector to select a different gear position; and monitoring, via at least one of the control unit of the automatic transmission system and the control unit of the automatic parking brake, a functioning of the control unit of the service brake system to determine whether the control unit of the service brake system is functional, wherein the monitoring of the functioning of the control unit of the service brake system is performed together with the monitoring of the functioning of a hydraulic power unit of the service brake system; and issuing, via at least one of the control unit of the automatic transmission system and the control unit of the automatic parking brake, the first command in response to detecting that the control unit of the service brake system is no longer functional. - View Dependent Claims (2, 3, 4, 5, 6, 9)
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7. A parking assistance system in a vehicle, comprising:
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a control unit having a parking assistance algorithm; a sensor system for scanning surroundings of the vehicle; and an actuator of a service brake system; wherein the parking assistance algorithm is configured to monitor a functioning of a hydraulic power unit of the service brake system for an error while performing the parking assistance using the service brake system, and to issue a request in immediate response to detecting the error, which request causes one a control unit of an automatic transmission system and a control unit of an automatic parking brake to issue a first command that activates the automatic transmission system to interrupt a transmission of drive torque to wheels of the vehicle by controlling a gear position selector to select a different gear position, wherein at least one of the control unit of the transmission system and the control unit of the automatic parking brake is configured to monitor a functioning of the control unit having a parking assistance algorithm to determine whether the control unit having a parking assistance algorithm is functional, and to issue the first command in response to detecting that the control unit having a parking assistance system is no longer functional, and wherein the monitoring of the functioning of the control unit of the service brake system is performed together with the monitoring of the functioning of a hydraulic power unit of the service brake system. - View Dependent Claims (8, 10, 11, 12)
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13. A parking assistance system in a vehicle, comprising:
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a brake control unit having a parking assistance algorithm configured to monitor a hydraulic power unit of a service brake system for an error in the hydraulic power unit, and to issue a request in immediate response to detecting the error, which request causes one a control unit of an automatic transmission system and a control unit of an automatic parking brake to issue a first command that activates the automatic transmission system to interrupt a transmission of drive torque to wheels of the vehicle by controlling a gear position selector to select a different gear position; a second control unit configured to simultaneously with the monitoring of the hydraulic power unit by the brake control unit, monitor the brake control unit for an error in the brake control unit, and to issue the first command in response to detecting that the control unit having a parking assistance system is no longer functional, wherein the monitoring of the functioning of the control unit of the service brake system is performed together with the monitoring of the functioning of a hydraulic power unit of the service brake system. - View Dependent Claims (14)
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Specification