Motorcycle Parking Brake Throttle Grip Actuation
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Solution Overview
Problem
Conventional parking brake systems for saddled vehicles often have complex structures and require additional operating elements, which can compromise safety, stability, and manufacturing costs.
Innovation Solution
A parking brake apparatus that utilizes the throttle grip on the steering handle to actuate the parking brake caliper, with an electric motor and control unit that ensures actuation only when specific conditions are met, such as zero vehicle speed and driver presence, simplifying the structure and eliminating the need for a dedicated brake operating element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated brake operating element is added for the parking brake, then the parking brake function is improved, but the device complexity increases
Solution Approach 1:
The throttle grip is designed to serve dual functions: controlling power output during vehicle operation and actuating the parking brake when reversed. This eliminates the need for a separate dedicated brake operating element while maintaining reliable parking brake functionality. The control unit distinguishes between forward rotation (power control) and reverse rotation (parking brake activation) to manage these different functions through a single component.
2Ease of operation
If additional transmission members and link mechanisms are disposed around the throttle grip, then the parking brake actuation is achieved, but the structure around the throttle grip becomes complicated
Solution Approach 1:
The patent replaces complex mechanical transmission members and link mechanisms with an electric motor-driven system. The motor (103) directly actuates the parking brake caliper (95, 111) through electrical control signals from the control unit (200), eliminating the need for mechanical linkages and reducing structural complexity around the throttle grip while maintaining ease of operation.
3Device complexity
If the throttle grip is used for both power control and parking brake actuation, then the component count is reduced, but the reliability of power control may be affected
Solution Approach 1:
The system dynamically adapts the function of the throttle grip based on rotation direction. Forward rotation controls power output during vehicle operation, while reverse rotation activates the parking brake. The control unit (200) monitors rotation direction and switches between these functions accordingly, ensuring that power control reliability is maintained during forward rotation while enabling parking brake functionality during reverse rotation.
4Speed
If the parking brake is always engaged when the throttle grip is reversely rotated, then the parking brake responsiveness is improved, but false actuation may occur during normal operation
Solution Approach 1:
The control unit (200) incorporates feedback mechanisms that monitor multiple parameters including vehicle speed (V), transmission gear stage, and throttle grip rotation direction before actuating the parking brake. The system checks that vehicle speed is zero and the vehicle is in neutral gear before allowing parking brake activation, preventing false actuation during normal operation while maintaining responsive parking brake engagement when conditions are appropriate.
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 enhances safety and stability by allowing the driver to actuate the parking brake while gripping the steering handle, reduces component count and manufacturing costs, and improves the vehicle's appearance, while ensuring the parking brake is only engaged when intended.
Implementation Method 1
The parking brake caliper (95, 111) is electrically driven by a motor (103)
Data Source
AI summary
To provide a parking brake apparatus for a saddled vehicle actuated in response to a reverse rotation on a throttle grip which is set in a simplified structure. A parking brake apparatus for a saddled vehicle includes a parking brake caliper configured to restrict a rotation of a rear wheel while the motorcycle is parked; a steering handle configured to steer a front wheel; and a throttle grip mounted on the steering handle and configured to control output of a power unit. The control unit actuates the parking brake caliper by a motor when at least the throttle grip is reversely rotated and the vehicle speed is zero. The throttle grip being reversely rotated is detected according to information from a throttle position sensor which is interlocked with the throttle grip.