EP0212682A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Self-diagnosis device and process for a micro-computer control system for a motor-vehicle internal combustion engine
Assignee: Fiat Auto SpA
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Filing: 1986-04-18
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Granted: —
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Expires: 2006-04-18
Abstract
Abstract A self-diagnosis device and process are proposed for a micro-computer control system for an internal combustion engine, particularly studied to display the functional state of preselected components of the same system, when this is in its operating configuration, the test program being executed by the same control system's micro-computer.
Inventors
- 👤 Renato Saglimbeni
- 👤 Daniele Casagrande
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:50
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/266; F02D41/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
Self-diagnosis device for verifying the functionality of a control system with programmed micro-computer, particularly used for controlling preselected operative parameters of an i.c. engine, wherein said micro-computer is operatively connected to sensors of determined engine parameters and to actuators of determined operative parameters of the same engine, and wherein said self-diagnosis device is provided with means indicating the functional state of said micro-computer, of said sensors and of said actuators, characterized in that it is provided with connection means operatively connectable to said micro-computer, when this is connected in its turn to said sensors and actuators, said microcomputer being also programmed to execute on command a preestablished sequence of operations of check of the functional state of its components and of said sensors and actuators and to display their state through the said indicator means.
Claim 2
Dependent Claim
135 words
Self-diagnosis device for verifying the functionality of a control system with programmed micro-computer, particularly used for controlling preselected operative parameters of an i.c. engine, wherein said micro-computer is operatively connected to sensors of determined engine parameters and to actuators of determined operative parameters of the same engine, and wherein said self-diagnosis device is provided with means indicating the functional state of said micro-computer, of said sensors and of said actuators, characterized in that it is provided with connection means operatively connectable to said micro-computer, when this is connected in its turn to said sensors and actuators, said microcomputer being also programmed to execute on command a preestablished sequence of operations of check of the functional state of its components and of said sensors and actuators and to display their state through the said indicator means.
Claim 3
Dependent Claim
50 words
Self-diagnosis device according to claim 1, characterized in that said microcomputer is programmed to verify in a first stage the functional state of its own components, and in further stages, the functional state of preselected sensor and actuator sets, and to correspondingly actuate the said indicator means in subsequent stages.
Claim 4
Dependent Claim
71 words
Self-diagnosis device according to claim 1, characterized in that it is provided with connection means operatively connectable to said micro-computer, when this is in its turn operatively connected to at least one electro-injector provided to supply fuel to said engine, , said mi cro-computer being programmed to verify whether in pre-established time intervals the charge current reaches pre- selected threshold values,and to display the test result through the related indicator means.
Claim 5
Dependent Claim
61 words
Self-diagnosis device according to claim 3, characterized in that it is provided with connection means operatively connectable to said micro-computer, when this is in its turn operatively connected to at least two electro-injector provided to supply fuel to said engine, said micro-computer being programmed to display through said indicator means which electroinjector is under such conditions as not to correctly operate.
Claim 6
Dependent Claim
134 words
Process for the self-diagnosis of the functionality of a control system with programmed micro-computer, in particular used to control preselected operative parameters of an i.c. engine, wherein said micro-computer is operatively connected to sensors of determined engine parameters, and to actuators of determined operative parameters of same engine, to display on indicator means the functional state of said microcomputer, of said sensors and of said actuators, characterized in that it consists in operatively connecting said indicator means to said micro-computer, when this is in its turn operatively connected to said sensors and to said actuators, in commanding said micro-computer to execute a pre-established sequence of operations of check of the functional state of its own components, of said sensors and actuators, and in displaying their functional state by means of the said indicator means.
Claim 7
Dependent Claim
134 words
Process for the self-diagnosis of the functionality of a control system with programmed micro-computer, in particular used to control preselected operative parameters of an i.c. engine, wherein said micro-computer is operatively connected to sensors of determined engine parameters, and to actuators of determined operative parameters of same engine, to display on indicator means the functional state of said microcomputer, of said sensors and of said actuators, characterized in that it consists in operatively connecting said indicator means to said micro-computer, when this is in its turn operatively connected to said sensors and to said actuators, in commanding said micro-computer to execute a pre-established sequence of operations of check of the functional state of its own components, of said sensors and actuators, and in displaying their functional state by means of the said indicator means.
Claim 8
Dependent Claim
52 words
Process according to claim 5, characterized in that it consists in commanding said micro-computer to verify in a first stage the functional state of its own components, and in further stages the functional state of preselected sensor and actuator sets, and in correspondingly actuating also the said indicator means in sequential stages.
Claim 9
Dependent Claim
75 words
Process according to claim 5, characterized in that it consists in operatively connecting said indicator means to said micro-computer, when this is in its turn operatively connected to at least an electroinjector provided to supply fuel to said engine, in commanding said microcomputer to test whether in pre-established time intervals the load current reaches pre-selected threshold values preferably lower than those of normal operation, and in displaying the test results through the related indictor means.
Claim 10
Dependent Claim
64 words
Self-diagnostic process according to claim 7, characterized in that it consists in operatively connecting said indicator means to said micro-computer, when this is in its turn operatively connected to at least two electroinjectors provided to supply fuel to said engine, and in commanding said micro-computer to display, by means of said indicator means, which electroinjector is under such conditions as not to correctly operate.
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