Vehicle Brake Force Control for Driver-Abnormality Deceleration
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Solution Overview
Problem
Existing vehicle controllers do not adequately address the issue of jolting the driver when decelerating in response to driver abnormalities, such as epilepsy or stroke, which can exacerbate the situation.
Innovation Solution
A vehicle controller that adjusts the ratio of rear wheel braking force to front wheel braking force based on the type of driver abnormality detected, using a processor to identify the abnormality and control the vehicle's deceleration to minimize jolting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle decelerates using conventional braking force ratio when driver abnormality is detected, then the vehicle can stop quickly, but the driver experiences jolting that may worsen the abnormality condition
Solution Approach 1:
The patent changes the braking force distribution parameter (ratio of rear wheel braking force to front wheel braking force) based on the detected abnormality type. When a jolting-sensitive abnormality is detected, the system sets the ratio to a first value that reduces jolting, whereas for other abnormalities it uses a second value that prioritizes faster stopping. This dynamic parameter adjustment resolves the contradiction between stopping speed and driver comfort.
2Object-affected harmful factors
If the vehicle uses a higher rear-to-front braking force ratio to reduce jolting, then driver comfort is improved, but the stopping distance increases
Solution Approach 1:
The system dynamically adjusts the braking force ratio based on real-time detection of driver abnormality type. The ratio is not fixed but changes according to the specific situation - using a higher ratio (first value) when jolting must be minimized and a lower ratio (second value) when stopping distance is prioritized. This dynamic adaptation allows the system to optimize both driver comfort and stopping efficiency based on current conditions.
Data Source
AI summary
A vehicle controller includes a processor configured to detect abnormality occurring in a driver of a vehicle, decelerate the vehicle so that a ratio of braking force of rear wheels of the vehicle to braking force of front wheels of the vehicle is a first ratio, when abnormality occurring in the driver is detected, and set the first ratio to a value greater than a second ratio. The second ratio is the ratio of braking force of the rear wheels to braking force of the front wheels for a case where the vehicle decelerates when an abnormality occurring in the driver is not detected.