Saddle Vehicle Brake Posture Control
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Solution Overview
Problem
In saddle-type vehicles, the operation of an automatic brake can significantly affect the occupant's posture, and there is a need for a system that rapidly decelerates the vehicle without disturbing the occupant's posture.
Innovation Solution
A brake device with hydraulic front and rear wheel brakes, controlled by a first unit and a second unit that includes a collision possibility determining section, an automatic brake controller, and suspension adjustment mechanisms to manage braking forces and vehicle posture, ensuring rapid deceleration without affecting the occupant's posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the automatic brake rapidly decelerates the saddle-type vehicle, then the deceleration performance is improved, but the occupant's posture is significantly affected
Solution Approach 1:
The brake system is divided into front and rear wheel brakes with independent control. The control unit separately manages braking force application to each wheel, enabling differential braking strategies that optimize deceleration while minimizing posture disruption
Solution Approach 2:
The control unit dynamically adjusts braking force parameters based on vehicle state, obstacle distance, and occupancy detection. By modulating brake pressure and application timing, the system achieves rapid deceleration while keeping posture-changing forces within acceptable thresholds
2Stability of the object's composition
If the front wheel brake is pressurized to a predetermined pressure to prevent vehicle body posture change, then the posture stability is improved, but the rapid deceleration capability is reduced
Solution Approach 1:
The system transitions from static predetermined pressure control to dynamic pressure adjustment. The control unit continuously monitors vehicle state and obstacle parameters, adjusting front brake pressure in real-time to maintain posture stability while maximizing deceleration capability
Solution Approach 2:
The control unit uses feedback from occupancy detection, distance measurement, and vehicle state sensors to continuously adjust braking forces. This closed-loop control enables the system to maintain posture stability while achieving rapid deceleration by adapting brake pressure to actual conditions
3Speed
If the rear wheel brake is pressurized to brake the rear wheel, then the deceleration performance is improved, but the risk of rear wheel lock increases
Solution Approach 1:
The control unit continuously monitors rear wheel braking conditions and adjusts pressure in real-time based on feedback signals. This prevents wheel lock by maintaining brake force within optimal limits while maximizing deceleration effectiveness
Solution Approach 2:
The control system applies braking in controlled intervals or pulses rather than continuous maximum pressure. This periodic or modulated braking approach prevents wheel lock while maintaining effective deceleration through repeated force application
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively reduces front-back pitching of the vehicle, allowing for rapid deceleration while minimizing the impact on the occupant's posture, even on varying road slopes and bank angles, by strategically controlling braking forces and suspension characteristics.
Implementation Method 1
a front wheel brake (32) and a rear wheel brake (33) that are hydraulic
Implementation Method 2
pressurizes the rear wheel brake (33) to brake a rear wheel (3)
Data Source
AI summary
In a brake device for a saddle-type vehicle, including hydraulic front and rear wheel brakes and a first control unit that controls operations of the front wheel brake and the rear wheel brake, a second control unit includes a collision possibility determining section that determines a possibility of collision of an own vehicle with an obstacle ahead, the first control unit has an automatic brake controller that performs automatic brake control to automatically increase braking forces of the front wheel brake and the rear wheel brake, and in case where the collision possibility determining section determines that there is the possibility of collision, the automatic brake controller pressurizes the rear wheel brake to brake a rear wheel, and simultaneously pressurizes the front wheel brake up to a predetermined pressure at which a vehicle body posture is not changed by braking of a front wheel.