Vehicle Driving Support Apparatus Brake Pedal Release Detection
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Solution Overview
Problem
Existing vehicle driving support systems face difficulties in effectively preventing collisions when a driver's foot accidentally slips off the brake pedal after automatic braking is cancelled during collision prevention control, potentially leading to unintended braking interventions.
Innovation Solution
A vehicle driving support apparatus with a collision determining unit, braking control unit, control halt determining unit, and control restart determining unit, which assesses the possibility of collision, performs braking control, halts braking when a driver operates the brake pedal, and restarts braking if the brake pedal depression exceeds a preset speed, ensuring prioritization of the driver's intention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic braking intervention is cancelled when brake pedal operation is detected, then driver's intention is prioritized, but collision prevention efficacy deteriorates when driver's foot accidentally slips off the brake pedal
Solution Approach 1:
The system dynamically adjusts the braking control state based on real-time brake pedal operation status. When brake pedal operation is detected during collision prevention control, the system transitions from automatic braking to driver-operated braking mode. The control restart determining unit then monitors whether the brake pedal operation amount changes to a release side at or over a preset speed, and if so, restarts the braking control. This dynamic adjustment resolves the contradiction by allowing the system to respond flexibly to different driver intentions while maintaining collision prevention capability.
Solution Approach 2:
The control restart determining unit continuously monitors the brake pedal operation amount and compares it against preset thresholds. When the brake pedal operation amount changes to a release side at or over a preset speed, the system receives feedback that the driver may have accidentally released the brake, and automatically restarts the braking control. This feedback mechanism ensures that collision prevention efficacy is maintained even when the driver's foot accidentally slips off the brake pedal.
2Reliability
If braking control is continuously maintained, then collision prevention is ensured, but driver's intention may be overridden causing unintended braking
Solution Approach 1:
The system dynamically switches between automatic braking control and driver-operated braking control based on detected brake pedal operations. When the control halt determining unit detects brake pedal operation, it halts the automatic braking control, allowing the driver's intention to take precedence. This dynamic switching prevents unintended braking while maintaining the ability to restart automatic braking when necessary for collision prevention.
Data Source
AI summary
In a vehicle driving support apparatus, if a brake pedal operation by a driver is detected during a braking control, a cruise control unit determines that it is highly likely that the driver recognizes a possibility of a collision of a subject vehicle and a obstacle, and halts the braking control. On the other hand, if a depression amount of the brake pedal by the driver changes to a release side at or over a preset speed, the cruise control unit restarts the halted braking control.