Vehicle Stop Holding Backup Control During Driver Exit
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Solution Overview
Problem
Existing vehicle stop holding devices may fail to maintain a stop holding state due to parking brake failures or other anomalies, leading to potential vehicle movement when the driver gets off.
Innovation Solution
A vehicle stop holding device that includes a control unit to initiate backup control for maintaining the stop state by a brake holding device when a driver's getting-off operation is detected, and outputs a brake operation request if both seat belt release and door opening operations are detected during the backup control, or transfers the brake operation to the driver if anomalies occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If backup control is executed by brake holding device when driver gets off, then stop holding state reliability is improved, but device complexity increases due to additional control logic and sensors
Solution Approach 1:
The system performs preliminary detection of driver's getting-off operations (seat belt release, door opening) before executing backup control. This allows the brake holding device to be activated proactively before the driver actually leaves the vehicle, ensuring the stop holding state is maintained from the outset rather than reacting after a failure occurs.
Solution Approach 2:
The control unit continuously monitors the execution status of backup control and detects anomalies in real-time. When an anomaly is detected, the system provides feedback by outputting brake operation requests to the driver and adjusting control strategies accordingly. This closed-loop feedback mechanism enhances reliability by adapting to actual system conditions while managing complexity through intelligent control algorithms.
2Reliability
If brake operation request is output to driver during backup control, then stop holding state reliability is improved, but ease of operation deteriorates due to additional driver actions required
Solution Approach 1:
The system outputs brake operation requests to the driver as a preliminary measure when anomalies are detected during backup control. This preemptive action warns the driver in advance and prepares them to take over brake operations before a complete failure occurs, preventing potential vehicle movement while giving the driver time to respond without causing sudden alarm or discomfort.
Solution Approach 2:
The control system dynamically adjusts its behavior based on the detection of driver operations. When the driver responds to a brake operation request or performs accelerator/brake operations, the control unit modifies the backup control execution accordingly. This dynamic adaptation balances reliability requirements with operational ease by engaging the driver only when necessary rather than requiring constant manual intervention.
3Measurement precision
If multiple detection conditions are monitored (seat belt, door, accelerator, brake), then measurement precision is improved, but device complexity increases due to multiple sensors and control logic
Solution Approach 1:
The control unit serves as a universal processing center that handles multiple detection functions simultaneously. Instead of having separate dedicated systems for detecting seat belt release, door opening, accelerator operation, and brake operation, the single control unit integrates all these detection capabilities. This multi-functional approach improves measurement precision by centralizing data processing while avoiding the complexity of multiple independent detection systems.
Solution Approach 2:
The patent combines multiple detection conditions and control functions into a unified backup control system. The control unit merges the detection of various driver operations (seat belt release, door opening, accelerator/brake operations) and integrates them with the brake holding device control. This consolidation improves detection precision by correlating multiple signals while reducing overall system complexity compared to having separate dedicated systems for each function.
Data Source
AI summary
A vehicle stop holding device for holding a stop of a vehicle includes a ECU for starting execution of a backup control for holding a stop state of the vehicle by a brake holding device when an operation of getting off the driver of the vehicle is detected while the vehicle is stopped by the brake device, and ECU outputs a brake operation request for requesting an operation of the brake device to the driver and releases the brake of the brake device when both a release operation of the seat belt by the driver of the vehicle and an opening operation which is an operation for opening the door are detected during a period from the start of the execution of the backup control until the completion of the completion.