Fuel Cell Vehicle Lid Fixing Pin Retry Control
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Solution Overview
Problem
Fuel cell vehicles face the risk of the lid covering the receptacle not being fixed in the closed state during travel, leading to potential damage when the lid opens against obstacles, due to positional shifts or user errors.
Innovation Solution
A vehicle system with an automatically movable lid, a fixing pin that moves between fixed and released positions, a detection mechanism to ensure the lid is closed, and a control system that performs retry operations if the lid was previously open, ensuring it remains closed during travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lid is made automatically movable from open to closed state, then the ease of operation is improved, but the reliability of lid fixation deteriorates due to possible positional shifts or timing shifts
Solution Approach 1:
The system performs preliminary detection of the lid state during the period from the latest end of vehicle operation to the time point of start-up instruction input acceptance. This advance detection allows the system to prepare appropriate fixation control before the vehicle actually starts, preventing potential fixation issues during travel.
Solution Approach 2:
The detection part continuously monitors the lid state and provides feedback to the control unit. Based on this feedback, the fixation control part adjusts the fixing pin position accordingly, and the retry control part implements corrective actions if the lid state is unexpected, creating a closed-loop control system that enhances reliability.
2Reliability
If the fixing pin is continuously monitored and re-fixed during vehicle operation, then the reliability of lid fixation is improved, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The memory stores the lid state detected during the period from the latest end of vehicle operation to the time point of start-up instruction input acceptance. This preliminary storage of state information allows the retry control part to make informed decisions about whether re-fixation is needed, avoiding unnecessary complex control operations during vehicle operation.
Solution Approach 2:
The system performs lid state detection and potential re-fixation operations periodically at specific moments: when the start-up instruction is accepted and when the vehicle is stopped. This periodic checking approach balances reliability enhancement with control system simplicity by not requiring continuous monitoring and intervention.
3Reliability
If the retry operation is executed at vehicle start-up, then the reliability of lid fixation is improved, but the loss of time occurs during the start-up process
Solution Approach 1:
The system performs lid state detection and fixation control in advance during the period from the latest end of vehicle operation to the time point of start-up instruction input acceptance. By completing the lid state verification and necessary fixation actions before the vehicle actually starts, the system avoids adding time to the vehicle start-up process itself while still ensuring reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system securely prevents the lid from opening during travel, reducing the risk of damage and passenger discomfort by re-fixing the lid at appropriate times, while minimizing excessive pin movement.
Implementation Method 1
a fuel cell for generating electric power by electrochemical reaction
Data Source
AI summary
A vehicle which includes a fuel cell, a receptacle, a lid, and a fixing pin, and which stores a detection of the open state during a period from a time point of a latest end of operation of the vehicle to a time point of input acceptance of a start-up instruction. If a detection of an open state has been stored in a memory at a time point of input acceptance of a start-up instruction, then the vehicle executes a retry operation of temporarily moving the fixing pin of the fixed position to the released position and thereafter moving the fixing pin again to the fixed position during an operating period of the vehicle from the time point of input acceptance of the start-up instruction.