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Failsafe parking assistance system

  • US 9,511,756 B2
  • Filed: 09/18/2007
  • Issued: 12/06/2016
  • Est. Priority Date: 10/17/2006
  • Status: Active Grant
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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