Motorcycle Clutch Plate Segmentation for Engine Brake Tuning
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Solution Overview
Problem
Existing power transmission apparatuses for motorcycles have a low degree of flexibility in setting cam surface angles, making it difficult to freely change transmission capacity during engine brake application without affecting acceleration.
Innovation Solution
A power transmission apparatus with a centrifugal clutch and a back torque transmission cam, featuring a divider that defines regions for clutch plates, allowing for independent control of transmission capacity during engine brake and acceleration, using a centrifugal clutch and back torque transmission cam to press clutch plates together or apart based on operational states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of driving clutch plates and driven clutch plates is changed to freely change transmission capacity during engine brake application, then transmission capacity during engine brake can be adjusted, but transmission capacity during acceleration changes undesirably
Solution Approach 1:
The clutch plates are divided into two distinct groups: a first group (driving clutch plates and driven clutch plates) that transmits power during acceleration, and a second group (driving clutch plates and driven clutch plates) that transmits power during engine brake application. The second clutch presses these two groups differently based on operational state, allowing independent control of transmission capacity for each function without affecting the other.
2Adaptability or versatility
If the angles of cam surfaces on back torque transmission cam are fixed, then the structure is simple, but transmission capacity cannot be freely changed during engine brake application
Solution Approach 1:
Instead of using fixed cam surfaces with predetermined angles, the invention employs a back torque transmission cam that dynamically responds to operational conditions. The cam surface is designed to engage with the second clutch in such a way that the pressing force on the second group of clutch plates is automatically adjusted based on the rotational speed difference between the input and output, providing adaptive transmission capacity control without complex adjustable 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
Enables flexible and accurate adjustment of transmission capacity during engine brake application without altering transmission capacity during acceleration, ensuring smooth operation and precise control.
Implementation Method 1
a centrifugal clutch including weights movable from a radially inner position to a radially outer position with centrifugal force produced by rotation of the clutch housing
Data Source
AI summary
In a power transmission apparatus, a second clutch includes a divider dividing driving clutch plates and driven clutch plates in an axial direction such that a first region adjacent to a clutch pressure plate and a second region adjacent to a centrifugal clutch are defined. The second clutch presses the driving clutch plates and the driven clutch plates in the first region and the second region against each other during operation of the centrifugal clutch, and presses the driving clutch plates and the driven clutch plates in the first region against each other during operation of a back torque transmission cam.