Self-diagnosis device and process for a micro-computer control system for a motor-vehicle internal combustion engine
First Claim
1. Self-diagnosis device for verifying the functionality of a control system with programmed micro-computer for controlling preselected operative parameters of an i.c. engine, said micro-computer being operatively connected to sensors of determined engine parameters and to actuators of determined operative parameters of the same engine, said self-diagnosis device comprising indicator means for indicating the functional state of said micro-computer, of said sensors and of said actuators, connection means operatively connectable to said micro-computer and in turn connected to said sensors and actuators, said micro-computer being also programmed to execute on command a preestablished sequence of operations to check the functional state of components of said micro-computer and of said sensors and actuators and to display their state through said indicator means, said microcomputer being further programmed to execute on command a preestablished sequence of operations to check the functional state of said sensors and said actuators by using operation simulating signals.
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Accused Products
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.
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Citations
7 Claims
- 1. Self-diagnosis device for verifying the functionality of a control system with programmed micro-computer for controlling preselected operative parameters of an i.c. engine, said micro-computer being operatively connected to sensors of determined engine parameters and to actuators of determined operative parameters of the same engine, said self-diagnosis device comprising indicator means for indicating the functional state of said micro-computer, of said sensors and of said actuators, connection means operatively connectable to said micro-computer and in turn connected to said sensors and actuators, said micro-computer being also programmed to execute on command a preestablished sequence of operations to check the functional state of components of said micro-computer and of said sensors and actuators and to display their state through said indicator means, said microcomputer being further programmed to execute on command a preestablished sequence of operations to check the functional state of said sensors and said actuators by using operation simulating signals.
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5. Process for the self-diagnosis of the functionality of an internal combustion engine control system which includes a programmed micro-computer connected to sensors of determined engine parameters and to actuators of determined operative parameters of the engine with the functional state of the micro-computer, the sensors and the actuators being displayed on indicator means, said process comprising the steps of:
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executing by the micro-computer a pre-established sequence of operations of checking the operational functional state of components of the micro-computer; displaying the functional state of the micro-computer components on the indicator means; executing by the micro-computer a pre-established sequence of operations of checking the operational functional state of each sensor by using operation simulating signals and displaying the functional state of each sensor on the indicator means; and executing by the micro-computer a pre-established sequence of operations of checking the operational functional state of each actuator by using operation simulating signals and displaying the functional state of each actuator on the indicator means. - View Dependent Claims (6, 7)
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Specification