Method for Storing Data Concerning an Operating Fault of a Device

• US 20080312787A1
• Filed: 11/29/2006
• Published: 12/18/2008
• Est. Priority Date: 12/14/2005
• Status: Active Grant

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: Regnard De Lagny, Joseph, Belaid, Abdelmalik
• Granted Patent: US 7,801,652 B2
• Time in Patent Office: Days
• US Class Current: 701/35
• CPC Class Codes: F02D 2200/501 Vehicle speed
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809
• CPC Class Codes: F02D 41/2425 Particular ways of programming the data
• CPC Class Codes: F02D 41/266 the computer being backed-up or assisted by another circuit, e.g. analogue
• CPC Class Codes: G07C 3/00 Registering or indicating the condition or the working of machines or other apparatus, other than vehicles

Abstract

A method for storing data concerning an operating fault of a device, wherein the recorded data include in particular a minimum value and a maximum value of a characteristic parameter of the operating mode of the device. The method includes an updating phase, performed when the fault occurs, which includes an operation that updates the minimum value and/or the maximum value based on the current value of the parameter. The updating phase may also include updating an occurrence number. The method may also include an initializing phase, during which a reference image of the parameters of the device is stored. The method is applicable in particular to the diagnosis of a vehicle engine-transmission unit.

Claims

1-6. -6. (canceled)

7. A method of recording information concerning a device operating fault, wherein the recorded information includes a minimum value and a maximum value of a parameter characteristic of an operation of the device, wherein the method comprises:

an update phase, performed on an occurrence of the fault and which comprises;

replacing the minimum value of the parameter with a current value of the parameter if the current value of the parameter is less than the minimum value, or

replacing the maximum value of the parameter with a current value of the parameter if the current value is greater than the previously recorded maximum value.

8. The method as claimed in claim 7, in which the update phase further comprises, performed on occurrence of the fault:

repeating the update phase for each parameter characteristic of the device in operation.

9. The method as claimed in claim 7, in which the update phase further comprises, performed on occurrence of the fault:

incrementing a number of occurrences of the fault.

10. The method as claimed in claim 7, in which the update phase is repeated on each occurrence of the fault.

11. The method as claimed in claim 7, further comprising an initialization phase, performed on first occurrence of the fault and comprising one or more of:

first initializing a reference value of the parameter with the current value of the parameter,

second initializing the minimum value of the parameter and the maximum value of the parameter with the current value of the parameter,

repeating the first initializing and/or the second initializing for each parameter characteristic of the device in operation,

initializing the number of occurrences.

12. An application of the method as claimed in claim 11, for recording information concerning an operating fault of a device or a drive train in a vehicle.