Lean Vehicle Brake Control Using Posture Feedback
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Solution Overview
Problem
Lean vehicles, such as motorcycles, face instability issues when emergency brake assist (EBA) systems increase braking force automatically, potentially leading to loss of balance and safety concerns.
Innovation Solution
A controller system that performs brake control based on collision possibility determined by environment sensors and adjusts braking force based on the lean vehicle's posture information to prevent instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emergency brake assist increases braking force automatically to improve safety, then collision avoidance capability is improved, but vehicle posture stability deteriorates
Solution Approach 1:
The brake control system dynamically adjusts braking force based on real-time posture information. The control section monitors vehicle posture and modifies braking force application to maintain stability while providing emergency brake assist, transforming the static brake system into a dynamic one that adapts to changing vehicle states.
Solution Approach 2:
The system implements feedback control by using posture information from sensors to continuously monitor vehicle state and adjusting braking force accordingly. The control section receives posture data and modifies brake actuator output in real-time, creating a closed-loop control system that prevents posture instability while maintaining collision avoidance capability.
2Speed
If braking force is increased rapidly to respond to collision risk, then collision avoidance effectiveness is improved, but vehicle balance is lost
Solution Approach 1:
The system employs dynamic brake control that adjusts the rate of braking force application based on current vehicle posture and conditions. Rather than applying maximum brake force instantly, the control section modulates the increase rate to match vehicle stability requirements, enabling rapid yet controlled brake response.
Solution Approach 2:
The control system changes multiple parameters simultaneously - braking force magnitude, rate of force application, and distribution between wheels - based on posture information. This multi-parameter adjustment allows the system to achieve rapid collision avoidance response while maintaining vehicle balance through coordinated parameter optimization.
Data Source
AI summary
The present disclosure obtains a controller and a control method capable of appropriately improving safety of a lean vehicle.According to the controller and the control method, the controller has a control section (62) configured to perform a brake control to increase a braking force of the lean vehicle (100). The control section (62) performs the brake control based on a collision possibility that is determined in response to an output result from an environment sensor (44). The control section (62), in the brake control, controls the braking force based on posture information of the lean vehicle (100).