Motorcycle Front Wheel Brake Control for Wheelie Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motorcycle systems fail to effectively prevent the occurrence of a wheelie travel state, which can compromise steering and braking performance, as they primarily focus on controlling the wheelie after it occurs rather than preventing it.
Innovation Solution
A motorcycle equipped with a front wheel brake, rear wheel brake, ABS modulator, and a control unit that detects the likelihood of the front wheel rising and operates the front wheel brake through the ABS modulator to prevent the wheelie travel state by causing the suspension to sag, thereby maintaining stable vehicle posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wheelie travel state has occurred, then the front wheel can be brought back to the road surface by decreasing engine output or performing TCS control, but the steering performance and braking performance are compromised during the wheelie state
Solution Approach 1:
The system performs preliminary detection of wheelie occurrence and activates front wheel brake control before the wheelie state fully develops, preventing the front wheel from rising in the first place rather than correcting after the fact. This maintains steering performance by avoiding the wheelie state entirely.
Solution Approach 2:
The system applies preliminary anti-action by detecting wheelie conditions and operating the front wheel brake to counteract the wheelie tendency before it compromises steering performance, thereby preventing the harmful effect rather than correcting it later.
2Reliability
If conventional control methods are used to correct wheelie after occurrence, then the front wheel can land on the road surface, but the structure becomes complex and acceleration loss increases
Solution Approach 1:
The ABS modulator, which is already part of the motorcycle's braking system, is utilized for dual purposes: normal braking operations and wheelie prevention control. This eliminates the need for separate wheelie control hardware, maintaining system simplicity while achieving reliable wheelie prevention.
Solution Approach 2:
The existing ABS system components (ABS modulator, front wheel brake) are made to serve the additional function of wheelie prevention, allowing the system to self-manage wheelie control without requiring external or additional specialized components.
3Reliability
If the front wheel brake is operated through the ABS modulator when wheelie is detected, then the suspension operates to sag the front fork and prevent wheelie, but this requires integration with existing braking systems
Solution Approach 1:
The wheelie prevention control function is merged with the existing ABS braking system by utilizing the ABS modulator to control the front wheel brake. This combines multiple functions (normal braking, ABS, and wheelie prevention) into a single integrated system, reducing overall complexity.
Solution Approach 2:
The ABS modulator is designed to perform multiple functions including normal braking modulation, ABS anti-lock control, and wheelie prevention through front wheel brake operation. This multi-functionality eliminates the need for separate control mechanisms.
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
This solution effectively prevents the wheelie travel state from occurring, enhancing steering and braking performance while reducing acceleration loss compared to conventional methods that control the wheelie after it happens.
Implementation Method 1
a front wheel brake configured to brake a front wheel (FW) that is supported by a front fork including a suspension
Data Source
AI summary
A motorcycle includes: a front wheel brake that brakes a front wheel that is supported by a front fork; a rear wheel brake; a control unit that controls an ABS modulator connected to the front wheel brake and the rear wheel brake on the basis of front wheel speed and rear wheel speed; and a front wheel rise detection unit that detects whether the front wheel is likely to rise from a road surface, wherein when the front wheel rise detection unit detects that the front wheel is likely to rise, the control unit operates the front wheel brake through the ABS modulator.