Method for diagnosing operating faults of an assembly of electronic systems, in particular in a motor vehicle

• US 20050038632A1
• Filed: 12/06/2002
• Published: 02/17/2005
• Est. Priority Date: 12/07/2001
• Status: Abandoned Application

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: Snyder, Ray, Boutin, Samuel
• Application Number:
  US10/497,856
• Publication Number:
  US 20050038632A1
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: G05B 23/0281 Quantitative, e.g. mathematical distance; Clustering; Neural networks; Statistical analysis
• CPC Class Codes: G05B 9/02 electric

Abstract

The invention concerns a method which consists in: a) when launching a diagnostic phase, in selecting the data (Xi) which have a specific value (Xip), b) for each selected data (Xi), finding the group (X8i) of data from which said specific value (Xip) taken by the data (Xi) is likely to originate, c) creating a list (X8) of data contained in the intersection of said groups (X8i) of data, and d) analyzing said list (X8) to identify the element(s) of the set whereof an operating fault from which said specific values taken by said data (Xi) originate.

Claims

1. A method for diagnosis of operating faults of an assembly of electronic systems provided with components (Aⁿ_i;

Cⁿ_i;

UCE_n;

B), producing and consuming data, at least one of the said data (x_i) being capable of assuming a predetermined particular value (x_ip) following the occurrence of an operating fault of at least one of the components (Aⁿ_i;

Cⁿ_i;

UCE_n;

B) of the said assembly, this method being characterized by the following stages;

a) when a diagnostic phase is initiated, the data (x_i) having a particular value (x_ip) are selected,

b) for each datum (x_i) selected in this way, a search is performed for the group (X<sub>∞

i</sub>) of data capable of being responsible for the particular value (x_ip) assumed by the datum (x_i),

c) the list (X_∞

) of data contained in the intersection of the said groups (X<sub>∞

i</sub>) of data is established, and

2. A method according to claim 1, characterized in that it comprises the following stage

d) the said list (X_∞

) is analyzed to identify the component or components of the assembly in which an operating fault is responsible for the particular values (x_ip) assumed by the said data (x_i).

3. A method according to claim 1, characterized in that there are excluded from the list (X_∞

), in stage c) or d), the data that do not correspond to the observed effects of operating faults.

4. A method according to any one of claims 1 and 2, characterized in that there are excluded from the list (X_∞

), in stage c) or d), the data transmitted by at least one predetermined system component of the assembly.

5. A method according to claim 3, characterized in that the said predetermined component is an electronic control unit (UCE_i) or a bus (B).

6. A method according to any one of the preceding claims 1 to 4, applied to an assembly of electronic systems installed on board a motor vehicle.