Driver Intention-Based Deceleration Support at Brake Release
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Solution Overview
Problem
Existing driving support systems provide excessive deceleration control when a driver releases the brake pedal, potentially against the driver's intention to pass a target object, leading to discomfort.
Innovation Solution
A driving support device that determines the driver's intention based on steering angle and vehicle position to adjust deceleration support levels, providing appropriate deceleration control through multiple modes tailored to different situations, including accelerator and brake release scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deceleration support control is executed when brake pedal is released, then collision avoidance is improved, but driver comfort deteriorates due to excessive deceleration against driver's intention
Solution Approach 1:
The system changes the deceleration support level parameter based on the detected driver intention. When passing intention is detected (steering angle exceeds threshold), the deceleration support level is reduced to a lower value, preventing excessive deceleration and maintaining driver comfort while still providing collision avoidance support.
Solution Approach 2:
The deceleration support level is made dynamic rather than fixed. The control device adjusts the support level in real-time based on the driver's steering input, transitioning between different support levels to balance collision avoidance reliability with driver comfort and natural driving behavior.
2Reliability
If deceleration support level is increased for safety, then collision avoidance is improved, but driver comfort deteriorates due to unnatural deceleration
Solution Approach 1:
The system applies different deceleration support levels to different driving situations. Instead of a uniform high deceleration level, the control device provides localized adjustment by reducing support level specifically when passing intention is detected, maintaining high safety where needed while ensuring comfort where the driver intends to pass.
3Reliability
If deceleration support is provided in brake release situation, then collision avoidance is improved, but system complexity increases due to multiple control modes
Solution Approach 1:
The control system is segmented into distinct operational modes based on driver intention. The control device determines whether the driver intends to pass or avoid collision, and executes appropriate deceleration support level accordingly. This segmentation simplifies the control logic by creating clear decision boundaries while maintaining comprehensive collision avoidance coverage.
Data Source
AI summary
Provided is a driving support device (1) including: an operation sensor configured to acquire operation information that is information on an operation on a driving operation device included in an own vehicle; a periphery sensor configured to acquire peripheral information that is information on a target object existing in a periphery of the own vehicle; and a control device configured to execute deceleration support control of supporting a driving operation executed by a driver to decelerate the own vehicle when existence of a target object in front of the own vehicle is detected based on the peripheral information and a predetermined precondition relating to the target object and the own vehicle is satisfied. The control device determines, when the precondition is satisfied and an operation of depressing a brake pedal of the own vehicle is released, a mode of the deceleration support control based on information on one or both of a steering angle and a position of the own vehicle in a crossing direction on a travel lane on which the own vehicle is traveling at a time point when the precondition is satisfied and the operation of depressing the brake pedal of the own vehicle is released.