Vehicle Brake Control Device Dual Pedal Operation Logic
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Solution Overview
Problem
Existing brake control devices for vehicles may prematurely release automatic braking when both the accelerator and brake pedals are operated simultaneously, potentially reducing the effectiveness of collision avoidance braking forces.
Innovation Solution
A brake control device that continues automatic braking when both pedals are operated simultaneously and determines the driver's intention to release the brake based on accelerator pedal operation, while providing brake assist control to enhance braking force when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the automatic brake is released when the accelerator pedal operation amount becomes equal to or larger than a predetermined value during automatic braking, then the driver's intention to release braking is respected, but the braking force is prematurely reduced when both pedals are operated simultaneously
Solution Approach 1:
The system changes the threshold parameter for accelerator pedal operation amount based on the brake pedal operation state. When the brake pedal is operated, a higher threshold is required to release automatic braking, preventing premature release when both pedals are pressed simultaneously. This parameter adaptation resolves the contradiction by making the release condition more stringent in the specific context of dual pedal operation.
2Reliability
If the automatic brake continues when both accelerator and brake pedals are operated simultaneously, then collision avoidance braking is maintained, but the driver's potential intention to release braking is not recognized
Solution Approach 1:
The system dynamically adjusts the automatic brake release decision based on real-time detection of brake pedal operation. When brake pedal operation is detected, the system switches to a mode where automatic braking continues despite accelerator pedal depression. This dynamic adaptation allows the system to maintain braking effectiveness while still recognizing driver intention under normal single-pedal conditions.
3Force
If the automatic braking applies a relatively large braking force, then effective collision avoidance is achieved, but the system may conflict with driver input when both pedals are operated
Solution Approach 1:
The system changes the operational parameters of automatic braking based on the dual pedal operation state. When both accelerator and brake pedals are detected as operated, the system maintains the high braking force parameter to ensure collision avoidance effectiveness. This parameter persistence resolves the contradiction by prioritizing safety while adapting to the specific dual-pedal context.
Data Source
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AI summary
A brake control device (10), characterized by comprising: an object detection unit (21, 22); a collision determination unit that determines whether a predetermined condition that there is a possibility that the vehicle collides with the object, is satisfied; an automatic brake application unit that applies an automatic brake when it is determined that the predetermined condition is satisfied; an automatic brake stop unit that causes the automatic brake application unit to stop the automatic brake when an operation amount of an accelerator operation unit (201) of the vehicle becomes equal to or larger than a predetermined threshold. The automatic brake stop unit is configured to cause the automatic brake application unit to continue the automatic brake when the specified condition including a condition that an operation amount of a brake operation unit of the vehicle is larger than a predetermined amount is satisfied.