Park-by-wire System Abnormality Detection for Automatic Parking
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Solution Overview
Problem
Existing automatic parking systems lack fail-safe control mechanisms to prevent interruptions due to system abnormalities in the park lock system during automatic parking, potentially leading to incomplete parking operations.
Innovation Solution
The implementation of a park-by-wire system with a failure diagnostic process that prohibits the start of automatic parking if a system abnormality is detected before the process begins, ensuring the park lock is engaged only when the system is functioning correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic parking control is started without pre-checking for system abnormalities, then productivity is improved by enabling faster parking operations, but reliability deteriorates because the system may be interrupted by undetected abnormalities
Solution Approach 1:
The system performs a preliminary diagnostic check of the park lock system before initiating automatic parking control. This advance detection of system abnormalities ensures that parking operations only commence when the system is functioning correctly, preventing interruptions while maintaining operational efficiency
2Reliability
If system abnormality detection is added to the automatic parking control system, then reliability is improved by preventing interruptions, but device complexity increases due to additional diagnostic components
Solution Approach 1:
The control unit performs multiple functions: it manages the automatic parking control sequence and simultaneously executes diagnostic checks of the park lock system. By integrating these functions into a single control unit, the system achieves reliable abnormality detection without proportionally increasing overall system complexity
3Reliability
If the system prohibits automatic parking when abnormalities are detected, then reliability is improved by ensuring safe operation, but productivity decreases due to additional check time
Solution Approach 1:
The diagnostic check is performed as a brief preliminary action before parking operations begin. This advance detection prevents time-consuming interruptions during the actual parking process, as abnormalities are identified and addressed before they can disrupt the main operation
Data Source
AI summary
An automatic parking control device includes an automatic parking controller that carries out automatic parking control, and a park-by-wire controller in which a park lock is automatically engaged when automatic parking is completed at a target stopping position by the automatic parking control. The park-by-wire controller determines whether a system abnormality would occur, in which the park-by-wire system does not operate normally during the automatic parking control. The automatic parking controller prohibits the starting of the automatic parking control upon determining that the system abnormality would occur before the automatic parking control is started.