Motorcycle Accelerator Grip Speed Limiter Release Mechanism
Solution Overview
Problem
Motorcycle riders face difficulties in easily releasing speed limit control, which can deteriorate the riding experience due to the need to press a button while operating the accelerator grip, and existing solutions do not seamlessly integrate with the natural operation of the accelerator.
Innovation Solution
A motorcycle design that includes a rotatable accelerator grip with specific positions for maximum and minimum torque output, where the speed limiter is turned off based on the grip's rotation position, allowing riders to easily release speed limit control by operating the grip in a natural manner, without interrupting acceleration or deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the speed limiter is released by pressing a button while operating the accelerator grip, then the speed limit control can be released, but the riding feeling is deteriorated and the operation becomes difficult in some situations
Solution Approach 1:
The patent merges the speed limiter release function with the accelerator grip operation. The accelerator grip is designed with a release detection unit that detects when the grip is rotated beyond a predetermined angle, triggering the speed limiter release. This combines the releasing action with the existing accelerator operation, eliminating the need for a separate button press and maintaining natural riding flow.
Solution Approach 2:
The accelerator grip is given multiple functions: it controls engine output through rotation and simultaneously serves as the release mechanism for the speed limiter when rotated beyond a certain angle. This multi-functionality reduces the number of separate controls needed and simplifies the user interface.
2Ease of operation
If the rider temporarily stops accelerator operation to press the release button, then the speed limit control can be released, but the acceleration is interrupted and riding experience is reduced
Solution Approach 1:
The patent enables continuous accelerator operation while releasing the speed limiter. The rider can rotate the accelerator grip to increase speed and simultaneously trigger the release function by rotating it beyond the predetermined angle, without needing to stop or reverse the acceleration action. This maintains the continuity of the useful action (acceleration) while achieving the release function.
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
Enables smooth and effortless release of speed limit control, maintaining a consistent riding experience by integrating the operation of the speed limiter with the natural operation of the accelerator grip, reducing the likelihood of deteriorating the riding feeling.
Implementation Method 1
an energizing member configured to energize the accelerator grip toward the first rotation position
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A motorcycle (1) includes an engine (5), an accelerator grip (11), an accelerator sensor (21) configured to detect a rotation position of the accelerator grip (11), a vehicle speed sensor (22) configured to detect vehicle speed, a driving source controller (31) configured to control the engine (5), a speed limiter (32) configured to limit an output torque of the engine (5) such that the vehicle does not exceed upper limit vehicle speed (Vs), and a speed limiter stopping device (34) configured to turn off the speed limiter (32), based on the rotation position of the accelerator grip (11).