Vehicle Automatic Braking Cancellation Logic
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Solution Overview
Problem
Existing vehicle brake control systems fail to accurately cancel automatic braking in a manner that aligns with the driver's intentions, as they only consider the frequency or duration of accelerator pedal operation, neglecting the driver's specific actions and conditions.
Innovation Solution
A vehicle control system that includes sensors to detect obstacles and accelerator pedal position, using a combination of normal and relaxed cancellation conditions based on accelerator operation amounts and driver actions to determine when to cancel automatic braking or alarm outputs, ensuring the system aligns with the driver's intentions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic braking is activated based on collision risk detection, then collision avoidance capability is improved, but unnecessary braking occurs when driver intention is not considered
Solution Approach 1:
The system continuously monitors accelerator pedal operation during automatic braking and uses this feedback to determine whether to cancel the braking. When the driver operates the accelerator pedal, this feedback signal triggers cancellation of the automatic braking, ensuring the system responds to actual driver intention rather than maintaining pre-programmed braking
Solution Approach 2:
The cancellation conditions are dynamically adjusted based on driving situation. The system distinguishes between normal cancellation (accelerator operation during braking) and relaxed cancellation (accelerator operation after braking ends), allowing flexible adaptation to different driver behaviors and situations rather than using a fixed cancellation rule
2Device complexity
If accelerator pedal operation frequency is used as the sole cancellation criterion, then system simplicity is maintained, but accurate detection of driver intention is compromised
Solution Approach 1:
The cancellation logic is segmented into distinct types: normal cancellation when accelerator operation occurs during automatic braking, and relaxed cancellation when accelerator operation occurs after braking ends. This segmentation allows each type to have optimized detection criteria suitable for its specific context, improving overall accuracy without requiring excessive complexity
Solution Approach 2:
The system changes the detection parameters based on the timing and context of accelerator operation. Instead of using a single fixed threshold, it evaluates whether the accelerator operation occurs during or after the braking period, adjusting the cancellation criteria accordingly to better match driver intention in different situations
Data Source
AI summary
A vehicle control method of performing automatic braking for automatically braking a vehicle or alarm output, depending on a possibility of a collision between the vehicle and an obstacle, includes: cancelling the automatic braking or the alarm output, when an accelerator operation amount is equal to or larger than a predetermined threshold value, during the automatic braking or the alarm output, and cancelling the automatic braking or the alarm output, when a given cancellation condition is satisfied under a situation where the accelerator operation amount of the vehicle is smaller than the predetermined threshold value, during the automatic braking or the alarm output.