Interlocking Motorcycle Brakes for Nosedive-Stable Deceleration
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Solution Overview
Problem
Existing brake systems for two-wheeled vehicles do not effectively optimize braking force distribution between the front and rear wheels during deceleration, leading to significant changes in vehicle posture that can compromise stability and control, especially during linear traveling and cornering.
Innovation Solution
A front-rear interlocking brake system that operates the front and rear wheel brakes in an interlocking manner, where the front wheel brake initiates first, followed by the rear wheel brake, with adjustable braking forces based on operational conditions and driver intent, using hydraulic pressure sensors and controllers to manage the distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional brake systems apply braking force to both front and rear wheels simultaneously, then the braking efficiency is improved, but the vehicle body posture stability deteriorates due to significant nosedive during deceleration
Solution Approach 1:
The front wheel brake is activated first before the rear wheel brake during deceleration. This preliminary action on the front wheel allows controlled nosedive initially, then the rear wheel brake is activated to suppress excessive nosedive and stabilize the vehicle body posture, resolving the contradiction between braking efficiency and posture stability
Solution Approach 2:
The brake system operates in two distinct phases: first the front wheel brake acts alone, then both front and rear wheel brakes act together. This periodic activation pattern optimizes both braking efficiency and vehicle body posture stability by adapting the braking force distribution to different stages of the braking process
2Force
If the rear wheel brake is activated immediately with the front wheel brake, then the overall braking force is increased, but the vehicle body experiences excessive pitch behavior and nosedive
Solution Approach 1:
The front wheel brake is activated in advance before the rear wheel brake. This preliminary action allows the front wheel to initially承担 the braking load, then the rear wheel brake is activated to provide additional braking force while suppressing excessive nosedive, achieving both high overall braking force and controlled pitch behavior
Solution Approach 2:
The brake system dynamically adjusts the activation timing of front and rear wheel brakes based on the braking process stage. The front wheel brake activates first, then the rear wheel brake activates subsequently, creating a dynamic braking force distribution that optimizes both overall braking force and vehicle body pitch behavior control
3Ease of operation
If a single operating element controls both front and rear wheel brakes, then the ease of operation is improved, but the precision of braking force distribution control deteriorates
Solution Approach 1:
The brake system incorporates sensors that detect braking force distribution and vehicle body posture, providing feedback to the control unit. The control unit adjusts the activation timing and braking force of front and rear wheel brakes based on this feedback, achieving precise braking force distribution control while maintaining single operating element simplicity
Solution Approach 2:
The brake system automatically adjusts the braking force distribution between front and rear wheels through the controller based on sensor feedback, without requiring manual intervention from the rider. This self-adjusting mechanism maintains ease of operation while achieving precise braking force distribution
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 stabilizes vehicle posture by suppressing nosedives during linear deceleration and facilitating smooth cornering by adjusting braking forces to match driver intent, enhancing vehicle stability and control.
Implementation Method 1
the actuating force generator (40) includes a front wheel master cylinder that generates a hydraulic pressure in response to an operation of the operating element (5), and the actuating force is a hydraulic pressure that is detectable by a hydraulic pressure sensor (50)
Data Source
AI summary
Provided is a saddled vehicle capable of optimizing distribution of a braking force between front and rear wheels at the time of deceleration during linear traveling, before entering a corner, and in a similar situation. A saddled vehicle (1) includes: a front wheel braking component (32) that applies a braking force to a front wheel (WF); and a rear wheel braking component (34) that applies a braking force to a rear wheel (WR), and is configured to operate the front wheel braking component (32) and the rear wheel braking component (34) in an interlocking manner in response to an operation of an operating element (5) as a single operating element. In response to the operation of the operating element (5), the front wheel braking component (32) first starts operating, and thereafter, in response to a braking condition of the front wheel braking component (32) satisfying a first condition, the rear wheel braking component (34) starts operating. In response to satisfaction of the first condition, the braking force of the rear wheel braking component (34) is increased while the braking force of the front wheel braking component (32) is maintained at a first front-wheel-braking force (P1).