Driver Assistance Braking Based on Following-Vehicle Distance
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Solution Overview
Problem
Existing driver assistance systems fail to consider following vehicles during deceleration stop control, leading to a risk of rear-end collisions due to insufficient deceleration adjustment based on intervehicle distance changes.
Innovation Solution
A driver assistance system that adjusts brake actuator control to reduce deceleration when a large increase in intervehicle distance is detected, ensuring gradual deceleration and stopping of the vehicle to prevent collisions with following vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deceleration stop control is performed without considering following vehicle, then driver assistance response is prompt, but vehicle is liable to be rear ended by following vehicle
Solution Approach 1:
The control device monitors intervehicle distance changes in real-time during deceleration stop control and uses this feedback to dynamically adjust brake actuator control. When a large increase in intervehicle distance is detected, the system reduces deceleration degree to prevent rear-end collisions, while maintaining prompt response to driver abnormal states through continuous monitoring of driver status.
Solution Approach 2:
The deceleration degree is made dynamic rather than fixed. The control device adjusts the deceleration degree based on real-time intervehicle distance changes, reducing deceleration when distance increases significantly and maintaining normal deceleration when distance remains stable, thereby adapting the braking behavior to current traffic conditions.
2Object-affected harmful factors
If brake actuator control is adjusted to reduce deceleration when intervehicle distance increases, then rear-end collision is prevented, but deceleration stop control time is extended
Solution Approach 1:
The deceleration degree is dynamically adjusted based on intervehicle distance changes. When distance increases by a large margin, deceleration is reduced to prevent rear-end collisions. When distance remains stable, normal deceleration is maintained, ensuring that the control time extension is minimized and only occurs when necessary for safety.
Data Source
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AI summary
A driver assistance control device (6) of a vehicle (100) is configured to perform driver assistance controlling at least a brake actuator of the vehicle (100) to make the vehicle stop if it is judged that a driver of the vehicle (100) is in an abnormal state where continuation of driving of the vehicle (100) would be difficult and control the brake actuator so that a deceleration degree of the vehicle (100) has become smaller when an intervehicle distance of the vehicle (100) with a following vehicle is increased by a large margin during deceleration by the driver assistance.