Vehicle Controller DTC Diagnostics with Delayed Flow Control
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Solution Overview
Problem
The increasing number of controllers in vehicles leads to longer Cycle Time (CT) in factory production lines during diagnostic trouble code (DTC) checks, necessitating a method to reduce diagnostic time.
Innovation Solution
A controller diagnostic method and device that collectively confirms diagnostic trouble codes by transmitting a DTC request signal, delaying the flow control signal transmission time based on response, processing, and priority considerations, and receiving DTC information through consecutive frames, incorporating data length information in the Protocol Control Information (PCI) field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of controllers is increased, then the vehicle's functionality is improved, but the diagnostic time increases
Solution Approach 1:
The diagnostic process is segmented into parallel operations where multiple controllers are diagnosed simultaneously through collective DTC requests, rather than sequentially checking each controller one by one
Solution Approach 2:
Multiple DTC requests are merged into a single collective diagnostic operation that processes multiple controllers at once, reducing the total diagnostic time while maintaining comprehensive coverage of all controllers
2Adaptability or versatility
If the number of controllers is increased, then the vehicle's functionality is improved, but the cycle time in production line increases
Solution Approach 1:
The production line diagnostic process is segmented to allow parallel processing of multiple controllers, reducing the cycle time required for quality assurance checks
Solution Approach 2:
The diagnostic system maintains continuous useful action by efficiently managing the flow of DTC requests and responses across multiple controllers without idle waiting time, keeping the production line moving
Data Source
AI summary
A controller diagnostic method includes transmitting a Diagnostic Trouble Code (DTC) request signal to a plurality of controllers; receiving a first frame of the plurality of controllers in response to the DTC request signal; delaying a transmission time of a flow control signal and transmitting the delayed flow control signal to the plurality of controllers; and receiving a DTC information by at least one consecutive frame provided by the plurality of controllers in response to the delayed flow control signal.