Computer-based engine diagnostic method

• US 5,010,487 A
• Filed: 03/02/1989
• Issued: 04/23/1991
• Est. Priority Date: 03/02/1989
• Status: Expired due to Fees

• Current Assignee: Coltec Industries Incorporated (Enpro Industries Incorporated)
• Original Assignee: Coltec Industries Incorporated (Enpro Industries Incorporated)
• Inventors: Stonehocker, Van T.
• Primary Examiner(s): Gruber, Felix D.
• Application Number:
  US07/317,893
• Time in Patent Office: 782 Days
• Field of Search: 364/424.03, 364/424.04, 364/550, 364/551.01, 340/146.2
• US Class Current: 701/29
• CPC Class Codes: F02D 2041/228 Warning displays
• 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: G05B 19/0428 Safety, monitoring G05B19/0423 takes precedence
• CPC Class Codes: G05B 2219/24018 Computer assisted repair, diagnostic
• CPC Class Codes: G05B 2219/24093 Display, show place of error, fault

Abstract

This invention is a computer-based engine-diagnostic method wherein there are provided lists of observable engine faults and causes for each observable engine fault. A user inputs one or more observed engine faults, and the software responds by displaying, in decreasing order by number of occurrences, causes which are common to two or more of the observed engine faults. Thus, the most probable causes for the observed engine faults appear at the head of the display. Additionally, once a probable cause is determined, the software is enabled to display other engine faults which should be observable, given the selected cause.

Claims

1. A system including a computer and a software program for providing product diagnostic information to a user, said system performing the method comprising the steps of:

storing a list of observable product faults;

storing a list of causes for each observable product fault;

displaying from said list of stored faults a group of two or more observable product faults;

and

in response to a user indication of at least two said observable product faults, displaying in decreasing order by number of occurrences, causes which are common to said user-indication of observed product faults, whereby the most probable cause for said observed product faults occurs at the head of said displayed group of product faults.

2. The method as described in claim 1 further including the steps of:

storing a list of remedies for said causes;

displaying, upon user request, the remedy for each said displayed cause.

3. The method as described in claim 2 further including the step of:

displaying all causes of one observed product fault in addition to said displayed causes common to said observed product faults.

4. The method as described in claim 1 further including the step of:

displaying all associated product faults related to said probable cause, to enable a user to determine if all associated observable product faults have been identified.