Motorcycle Steering Assist Torque for Obstacle-Aware Handle Control
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Solution Overview
Problem
Existing advanced rider assistance systems for saddle type vehicles lack appropriate assist steering control during operations such as collision mitigation brake, lane departure warning, and blind spot information.
Innovation Solution
A steering assistance device for saddle type vehicles that includes a steering actuator, control device, and external detection system to apply assist torque based on obstacle detection, predicting vehicle movements, and adjusting handle operation to avoid obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If assist torque is applied to facilitate steering operation, then ease of operation is improved, but unintended course changes may occur when obstacles are present
Solution Approach 1:
The assist torque control system dynamically adjusts its behavior based on real-time obstacle detection. When an obstacle is detected by the external detection device, the control device modifies the assist torque characteristics to prevent unintended course changes toward the obstacle, while maintaining normal assist torque when no obstacle is present. This dynamic adaptation resolves the contradiction by making the system responsive to environmental conditions.
Solution Approach 2:
The system employs feedback from the external detection device to continuously monitor the steering environment. The detection device provides real-time information about obstacles, and the control device uses this feedback to adjust assist torque accordingly. This closed-loop feedback mechanism ensures that assist torque facilitates steering operation only when safe, preventing unintended course changes while obstacles are present.
2Ease of operation
If advanced rider assistance system operates with standard assist torque, then steering assistance is provided, but appropriateness of assist steering during assistance system operation is lacking
Solution Approach 1:
The assist torque control system dynamically adapts its characteristics based on the operational state of the advanced rider assistance system. When the assistance system is active and detects obstacles, the control device modifies assist torque to be appropriate for the current situation, preventing unintended course changes. This dynamic behavior provides both steering assistance and situational appropriateness.
Solution Approach 2:
The control device changes the parameters of assist torque (magnitude, direction, timing) based on obstacle detection results and assistance system operation status. By adjusting torque parameters dynamically, the system maintains steering assistance functionality while ensuring appropriateness during advanced rider assistance system operation, resolving the contradiction between ease of operation and adaptability.
Data Source
AI summary
When an external detection device detects an obstacle (another vehicle (T)) on either a left or right side of the own vehicle (M), a control device of a steering assistance device for a saddle type vehicle controls an assist torque so that a handle operation to the side opposite to the side on which the obstacle is detected becomes heavier (more difficult to turn) than a case in which the obstacle is not detected. The handle operation to the side on which the obstacle is detected makes a handle relatively light (makes it easier to turn) while steering assist is maintained.