Lane Change Assist Control for Towed Vehicles
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Solution Overview
Problem
Existing driving assistance systems struggle to smoothly execute lane changes when a towed vehicle is coupled to the host vehicle, leading to swaying and cancellation of lane changing assist control due to inappropriate execution.
Innovation Solution
A driving assistance apparatus equipped with a surrounding information acquisition device, vehicle speed detection device, and control unit that adjusts lane change time based on the presence of a towed vehicle, extending the lane change time to reduce vehicle speed and yaw angle change rate, thereby minimizing swaying and ensuring smooth lane changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lane changing assist control is executed with standard lane change time for host vehicle alone, then lane change efficiency is maintained, but entire vehicle sways and control cancellation occurs when towed vehicle is coupled
Solution Approach 1:
The system dynamically adjusts the lane change time parameter based on whether a towed vehicle is coupled to the host vehicle. When a towed vehicle is detected, the lane change time is extended from the standard value to a longer duration, allowing the control system to adapt its behavior to the changed vehicle dynamics and prevent swaying
Solution Approach 2:
The control unit detects the coupling state of the towed vehicle and uses this feedback information to modify the lane change execution parameters. This feedback mechanism enables the system to automatically adjust lane change time based on the actual vehicle configuration, preventing control cancellation and swaying
2Reliability
If lane change time is extended to reduce vehicle speed and yaw angle change rate, then swaying is minimized and control stability is maintained, but lane change duration increases
Solution Approach 1:
The system changes the lane change time parameter based on the vehicle configuration. By extending the lane change time when a towed vehicle is coupled, the system reduces the vehicle speed and yaw angle change rate during lane change, thereby minimizing swaying and maintaining control stability
Data Source
AI summary
A driving assistance apparatus includes a surrounding information acquisition device configured to acquire information on a three-dimensional object present in surroundings of a vehicle and a lane marking extending in front of the vehicle as surrounding information, a vehicle speed detection device, and a control unit configured to execute, as a steering assist control, a lane tracing assist control and a lane changing assist control, in which the control unit is configured to determine whether or not a tow condition that is satisfied in a case where a towed vehicle is coupled to the vehicle is satisfied, based on the surrounding information and vehicle speed, and make a lane change time longer in a case where a tow condition is satisfied when a start condition of the lane changing assist control is satisfied than a case where the tow condition is not satisfied.