Clutch Lever Reactive Force Device Air Bleeding Contamination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Reactive force generation devices in clutch-by-wire systems face issues with foreign substances like water and dust entering through air bleeding holes, which can degrade their performance.
Innovation Solution
The design incorporates a piston structure with an air bleeding hole positioned in a contact member that obstructs foreign substances by being located near the clutch lever, featuring a labyrinth structure and a spirally extending flow passage to prevent entry, and an adjuster to adjust the reactive force applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air bleeding hole is provided in the piston structure to allow air to enter and exit according to volume changes when the piston moves, then the piston structure can maintain proper air pressure and volume balance, but foreign substances such as water or dust may enter the inside of the piston structure through the air bleeding hole, and performance in the function of the reactive force generation device may be deteriorated
Solution Approach 1:
The contact member serves as an intermediary component between the air bleeding hole and the external environment. By positioning the air bleeding hole in the contact member that interfaces with the clutch lever, the design uses the clutch lever itself as a protective barrier, preventing foreign substances from directly accessing the air bleeding hole while still allowing air to pass through.
Solution Approach 2:
The invention changes the spatial dimension of the air bleeding hole by moving it from the piston body to the contact member surface. This dimensional relocation places the air bleeding hole in a different spatial context where it is naturally protected by the clutch lever's physical presence, effectively using the third dimension (spatial positioning) to solve the contamination problem.
2Object-affected harmful factors
If the air bleeding hole is positioned closer to the clutch lever by forming it in the contact member, then it is disposed at a position at which it is more difficult to access from the outside, but the structural complexity of the piston structure increases
Solution Approach 1:
The contact member is given multiple functions: it serves as both the component that interfaces with the clutch lever (providing contact force) and as the housing for the air bleeding hole. This multi-functionality eliminates the need for separate structures to protect the air bleeding hole, thereby reducing overall structural complexity while achieving the protective effect.
Solution Approach 2:
The invention merges the air bleeding function with the contact member by forming the air bleeding hole directly in it. This consolidation combines two previously separate functions (contact force application and air bleeding) into a single component, simplifying the overall structure rather than adding complexity.
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
Effectively prevents the entry of foreign substances into the piston structure, maintaining performance and allowing for adjustable reactive force application.
Implementation Method 1
a plurality of coil springs which gradually change a rate of increase of the operation reactive force of the clutch lever using an action of respective biasing forces thereof
Implementation Method 2
the contact member (133) has a contact surface (138) which comes into contact with a roller (80) of the clutch lever (51) and in which the air bleeding hole (139) opens, and the roller (80) rolls on the contact surface (138) according to an operation of the clutch lever (51)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A reactive force generation device (130) of clutch-by-wire system is a reactive force generation device which generates a reactive force on a clutch lever (51), and includes a piston structure in which an air bleeding hole (139) is provided, and a contact member (133) which is in contact with the clutch lever (51) and in which the air bleeding hole 139 is formed.