Overall diagnosis apparatus for vehicle-mounted control devices
First Claim
1. An overall diagnosis apparatus for vehicle mounted control devices comprising:
- a plurality of control computers respectively provided for a plurality of electronic control systems mounted on a vehicle, said control computers respectively executing the controls exclusively for these control systems;
data transfer means for linking all of said control computers to allow data communication among said control computers; and
a diagnosis computer connected to said transfer means, said diagnosis computer diagnosing operation of at least one of said electronic control systems to produce a diagnostic result, diagno0sis of each said at least one electronic control system being on the basis of related data transferred through said transfer means from at least two of said control computers.
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Accused Products
Abstract
A plurality of control systems mounted on a vehicle such as an automobile, and provided for different controlled objects are respectively made of control computers. These control computers are linked by a common data bus. These computers exclusively execute, for example, an engine control, a transmission control, a brake control, a suspension control, and a auto drive control. The data bus is further connected to a diagnosis computer. Each control computer detects a signal from the sensor provided corresponding to each controlled object, and outputs the detect signal to the data bus. Each control computer executes the logical operation for its control on the basis of its detect signal and various data transferred to the data bus. The diagnosis computer supervises an operating state of each control system on the basis of the data transferred to the data bus. When an abnormality is detected, the diagnosis computer stores this data in a large-capacity memory, and displays the abnormality.
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Citations
15 Claims
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1. An overall diagnosis apparatus for vehicle mounted control devices comprising:
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a plurality of control computers respectively provided for a plurality of electronic control systems mounted on a vehicle, said control computers respectively executing the controls exclusively for these control systems; data transfer means for linking all of said control computers to allow data communication among said control computers; and a diagnosis computer connected to said transfer means, said diagnosis computer diagnosing operation of at least one of said electronic control systems to produce a diagnostic result, diagno0sis of each said at least one electronic control system being on the basis of related data transferred through said transfer means from at least two of said control computers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for diagnosing a plurality of control computers by a diagnosis computer, said plurality of control computers respectively provided for a plurality of electronic control systems mounted on a vehicle, said method comprising the steps of:
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(a) transferring related data from at least two of said control computers to said diagnosis computer; (b) comparing said related data transferred at said step (a) with each other by said diagnosis computer; and (c) diagnosing trouble with at least one of said control computers corresponding to the result of said step (b) by said diagnosis computer.
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Specification