Calculator for a vehicle, such as a power steering calculator, provided with an integrated event recorder
First Claim
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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Accused Products
Abstract
A computer for a motor vehicle including at least one main control module intended to manage an onboard system such as a power steering system, which uses a plurality of internal variables representative of the successive life situations of the vehicle, the computer including, in addition to the main control module, an integrated monitoring module that includes an extraction and recording unit, placed under the dependency of a trigger unit in order to extract, from a buffer memory, in case of a detection of a predefined alarm event occurring at a triggering time, one or more recordings, that correspond respectively to one or more internal variables, and that each cover a time interval that extends from a start time that precedes the triggering time to an end time that follows the triggering time, and then to store the recording or recordings in a non-volatile memory.
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Citations
13 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for a motor vehicle, comprising:
a power steering system comprising; a steering mechanism that, by way of a steering wheel, allows a driver of the vehicle to change a steering angle of wheels of the vehicle, and an assist motor configured to exert force on the steering mechanism; and a calculator for the motor vehicle, the calculator comprising; at least one main control module executed by a processor configured to manage the 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, wherein the sensors of the power steering system from which the at least one main control module obtains the internal variables representative of the operation of the power steering system comprise at least one of (i) a revolver type sensor configured to determine a position of the power steering system by way of measurement of an angular position of a shaft of the assist motor and (ii) a magnetic steering wheel torque sensor.
Specification