ACC Following Control for No-Passing Lane Changes
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Solution Overview
Problem
Existing adaptive cruise control (ACC) systems cause driver discomfort due to unnecessary acceleration and deceleration when a preceding vehicle changes lanes or disappears, leading to rapid adjustments in vehicle speed to maintain a set speed in right-hand traffic conditions where passing in the left lane is prohibited.
Innovation Solution
A driving assistance apparatus that includes a vehicle following controller to register a preceding vehicle as a no-passing target when it changes lanes, allowing for smooth vehicle following control by minimizing acceleration and deceleration, using sensors to detect lane changes and vehicle positions, and adjusting target following distances to reduce discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the ACC causes the vehicle to accelerate to the set vehicle speed when the preceding vehicle is no longer detected, then the vehicle can maintain its intended speed, but this causes driver discomfort due to unnecessary acceleration and deceleration
Solution Approach 1:
The system performs preliminary registration of the preceding vehicle as a no-passing target vehicle before it actually changes lanes. By detecting the lane change intention or early stage lane change, the system pre-registers the vehicle, so when the vehicle disappears from the current lane, the system already has the registration information and can maintain following control without unnecessary acceleration to set speed.
2Reliability
If the ACC performs rapid acceleration and deceleration to maintain set speed when preceding vehicle disappears, then the vehicle can respond quickly to changing conditions, but this creates erroneous braking and reduces driving safety
Solution Approach 1:
The system performs preliminary registration of the preceding vehicle as a no-passing target vehicle before it actually changes lanes. By detecting the lane change intention or early stage lane change, the system pre-registers the vehicle, so when the vehicle disappears from the current lane, the system already has the registration information and can maintain following control without unnecessary acceleration to set speed.
Solution Approach 2:
The system uses traveling environment information acquisition to continuously monitor the preceding vehicle's position and lane status. When the vehicle changes lanes or disappears, the feedback mechanism triggers the no-passing target vehicle registration, which then maintains following control based on this registration, preventing erroneous braking by providing accurate feedback about the vehicle's status.
Data Source
AI summary
A driving assistance apparatus for a vehicle includes a traveling environment information acquirer that acquires information regarding traveling environment ahead of the vehicle; and a vehicle following controller that, when a preceding vehicle most previously traveling in front of the vehicle is detected based on the information regarding traveling environment, perform a vehicle following control with respect to the preceding vehicle. The vehicle following controller includes a registration unit for no-passing target vehicles that performs regarding the preceding vehicle registration as a no-passing target vehicle based on the information regarding traveling environment when the preceding vehicle has departed to a no-passing target lane side or the vehicle has departed to a no-passing lane side, and a no-passing target following controller that performs the vehicle following control with respect to the no-passing target vehicle when the registration unit for no-passing target vehicles has performed the registration as the no-passing target vehicle.