Adaptive Deceleration Assistance Based on Driver Pedal Release
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Solution Overview
Problem
Existing driving assistance devices do not consider the driver's operation when providing deceleration assistance, leading to discomfort as the same assistance is applied regardless of the driver's actions, such as accelerator or brake release.
Innovation Solution
A driving assistance device that differentiates between first and second deceleration assistance based on the driver's operation, with the first assistance executed when the driver does not operate the accelerator or brake and the second assistance tailored to the driver's release actions, varying in deceleration upper limit value, jerk upper limit value, or start timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same deceleration assistance is executed regardless of driver operation, then the deceleration assistance system is simple to control, but the driver experiences discomfort due to lack of adaptation to driver actions
Solution Approach 1:
The deceleration assistance execution unit dynamically switches between first deceleration assistance and second deceleration assistance based on real-time detection of driver operations (accelerator or brake input). This dynamic adaptation allows the system to adjust deceleration characteristics according to driver behavior, improving comfort while maintaining manageable complexity through event-driven control logic.
Solution Approach 2:
The system applies different deceleration assistance characteristics (first vs. second deceleration assistance) based on the local condition of driver operation. When the driver operates the accelerator or brake, second deceleration assistance is executed with modified parameters; otherwise, first deceleration assistance is applied. This localized adaptation to driver actions resolves the contradiction between simplicity and comfort.
2Reliability
If deceleration assistance is provided without considering driver operation, then the response time is fast, but the driver perception of vehicle situation becomes inconsistent
Solution Approach 1:
The deceleration assistance execution unit continuously monitors driver operations (accelerator and brake inputs) and uses this feedback to determine which deceleration assistance to execute. This feedback mechanism ensures that the deceleration assistance aligns with driver intent, maintaining consistent driver perception of vehicle situation while adding only minimal detection and conditional execution complexity.
3Ease of operation
If different deceleration assistance is executed based on driver operation, then driver comfort is improved, but the control system becomes more complex
Solution Approach 1:
The deceleration assistance is segmented into two distinct modes: first deceleration assistance for normal conditions and second deceleration assistance for conditions where the driver operates the accelerator or brake. This segmentation allows the system to provide optimized deceleration characteristics for different driver behaviors, improving smoothness and comfort while keeping the control logic structured and manageable through clear mode differentiation.
Data Source
AI summary
There is provided a driving assistance device that executes deceleration assistance of a host vehicle when a relative situation between a deceleration object in front of the host vehicle and the host vehicle satisfies a preset deceleration assistance precondition and a driver of the host vehicle does not operate an accelerator and a brake, the driving assistance device including a first deceleration assistance execution unit configured to execute a first deceleration assistance when the deceleration assistance precondition is satisfied in a state in which the driver of the host vehicle does not operate the accelerator and the brake, and a second deceleration assistance execution unit configured to execute a second deceleration assistance when the driver releases the accelerator or the brake in a state in which the deceleration assistance precondition is satisfied.