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Calculator for a vehicle, such as a power steering calculator, provided with an integrated event recorder

  • US 10,282,926 B2
  • Filed: 08/04/2015
  • Issued: 05/07/2019
  • Est. Priority Date: 08/22/2014
  • Status: Active Grant
First Claim
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1. A calculator for a motor vehicle, the calculator comprising:

  • at least one main control module executed by a processor configured to manage a power steering system of the motor vehicle and configured to use a plurality of internal variables that are representative of at least one of successive life situations of the vehicle and operation of the power steering system, the internal variables representative of the operation of the power steering system being provided by sensors of the power steering system; and

    an integrated monitoring module executed by a processor configured to;

    record in a buffer memory, over a predetermined sliding acquisition period, values taken successively by one or several of the internal variables as a function of time, an oldest one of the values being erased from the buffer memory and replaced by a newest one of the values when a duration covered by the recorded values equals the predetermined sliding acquisition period,detect, from one or several predetermined trigger conditions that relate to one or several of the internal variables, an event called an “

    alert event”

    , which corresponds to a predefined one of the life situations of the vehicle or of the power steering system considered to be dangerous or abnormal,identify the time, called “

    trigger time,”

    at which the alert event occurred,in case of detection of the alert event, extract from the buffer memory one or several recordings, which correspond respectively to one or several of the internal variables and each cover a time interval extending from (i) a start time that precedes the trigger time by a predetermined duration called “

    pre-event duration”

    to (ii) an end time that follows the trigger time by a predetermined duration called “

    post-event duration”

    , andthen store the one or several recordings in a non-volatile memory.

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