Motor vehicle diagnostic monitoring system
First Claim
Patent Images
1. A diagnostic monitoring system for a motor vehicle, comprising:
- a plurality of control devices each separately controlling a part of said vehicle in accordance with a predetermined control program, each of said control devices including means for detecting abnormal operation of the respective control device in accordance with a diagnostic sub-program of said predetermined control program, and for generating abnormal operation signals in response to said detected abnormal operation signals in response to said detected abnormal operation;
central supervisory means, receiving said abnormal operation signals generated from said plurality of control devices, for separately storing abnormal operation data corresponding to said generated abnormal operation signals from each of said control devices in each of first and second memory areas, and for resetting abnormal operation data in said first memory area at a first predetermined time after a previous generation of abnormal operation signals, said reset abnormal operation data corresponding to a last generated abnormal operation signal, and for resetting the corresponding abnormal operation data in said second memory area at a second predetermined time which is longer than said first predetermined time;
command generating means for generating first and second commands to display first and second abnormal conditions; and
display means, responsive to said first command from said command generating means, for displaying said first abnormal conditions in accordance with the abnormal operation data stored in said first memory area, and responsive to said second command from said command generating means, for displaying said second abnormal conditions in accordance with the abnormal operation data stored at least in said second memory area.
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Abstract
A diagnostic monitoring system, for detecting and displaying malfunctions or abnormal operations occurring in various engine operation control computers, includes a microcomputer, actuators and sensors. Each of the engine operation control computers performs a diagnosis program as a part of their control programs and produces a signal whenever a malfunction or abnormal operation is detected. A central supervisory system receives such signals from the engine operation control computers and stores them separately for the individual control computers. A display unit displays the stored signals in response to instructions from the central supervisory system.
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Citations
9 Claims
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1. A diagnostic monitoring system for a motor vehicle, comprising:
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a plurality of control devices each separately controlling a part of said vehicle in accordance with a predetermined control program, each of said control devices including means for detecting abnormal operation of the respective control device in accordance with a diagnostic sub-program of said predetermined control program, and for generating abnormal operation signals in response to said detected abnormal operation signals in response to said detected abnormal operation; central supervisory means, receiving said abnormal operation signals generated from said plurality of control devices, for separately storing abnormal operation data corresponding to said generated abnormal operation signals from each of said control devices in each of first and second memory areas, and for resetting abnormal operation data in said first memory area at a first predetermined time after a previous generation of abnormal operation signals, said reset abnormal operation data corresponding to a last generated abnormal operation signal, and for resetting the corresponding abnormal operation data in said second memory area at a second predetermined time which is longer than said first predetermined time; command generating means for generating first and second commands to display first and second abnormal conditions; and display means, responsive to said first command from said command generating means, for displaying said first abnormal conditions in accordance with the abnormal operation data stored in said first memory area, and responsive to said second command from said command generating means, for displaying said second abnormal conditions in accordance with the abnormal operation data stored at least in said second memory area. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A diagnostic monitoring system for a motor vehicle, comprising:
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a plurality of control devices each separately controlling an object part of said vehicle in accordance with a predetermined control program, each of said control devices including means for detecting abnormal operation of the respective control device in accordance with a diagnostic sub-program of said control program, and for generating abnormal operation signals in response to said detections; central supervisory means for receiving the abnormal operation signals generated by said plurality of control devices separately for each of said control devices, and for storing abnormal operation data corresponding to said generated abnormal operation signals separately for each of said control devices; command generating means for generating commands to display abnormal conditions; display means, responsive to said commands generated from said command generating means, for displaying said abnormal conditions in accordance with the abnormal operation data stored in said central supervisory means; and resetting means for selectively resetting the abnormal operation data stored in said central supervisory means. - View Dependent Claims (8, 9)
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Specification