Stroke Simulator Rubber Damper Layout for Natural Brake Pedal Feel
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Solution Overview
Problem
Existing stroke simulators fail to provide an excellent pedal feeling due to lack of specific details on the elastic member's compression and deformation during piston movement.
Innovation Solution
A stroke simulator is configured with an elastic member in a cylinder that is restricted from radial deformation, using a combination of a piston, spring, and rubber damper to generate a natural pedal feeling by controlling the compression and deformation of the elastic member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the elastic member is allowed to deform radially during piston movement, then the pedal feeling becomes unnatural with increased friction and hysteresis, but restricting radial deformation requires additional structural constraints
Solution Approach 1:
The patent uses a rubber damper (elastic member) that is specifically designed to be compressible along the piston movement direction while being constrained from radial deformation. The rubber damper is disposed between the piston and the bottom of the cylinder, and its elastic properties provide the desired pedal feeling through controlled compression without radial deformation that would cause friction and hysteresis.
Solution Approach 2:
The patent applies different deformation characteristics to different directions of the elastic member. The rubber damper is allowed to deform only in the axial direction (compression along piston movement) while being restricted from radial deformation. This directional differentiation of deformation properties optimizes the pedal feeling by eliminating harmful radial deformation effects.
2Device complexity
If the elastic member compresses and deforms freely during piston movement, then the structure remains simple, but the pedal feeling becomes unnatural due to friction and hysteresis from radial deformation
Solution Approach 1:
The rubber damper serves as the elastic member that provides natural pedal feeling through controlled elastic deformation. By using a flexible rubber element constrained to compress only axially, the patent achieves excellent pedal feeling without requiring complex mechanical constraint structures.
Solution Approach 2:
The patent changes the deformation parameters of the elastic member by restricting it to uniaxial compression only. The rubber damper's material properties and geometric configuration are selected to provide appropriate stiffness and damping characteristics in the compression direction while preventing radial deformation, thereby optimizing pedal feeling.
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
The solution enhances the pedal feeling by reducing friction and hysteresis, providing a smooth and natural response to brake pedal operation through controlled compression and deformation of the elastic member.
Implementation Method 1
an elastic member disposed in a cylinder so as to be compressed according to a movement of the piston
Implementation Method 2
a compression and deformation of an elastic member according to a movement of a piston
Data Source
AI summary
A stroke simulator is configured in such a manner that an elastic member disposed in a cylinder of the stroke simulator is restricted from being deformed in a radial direction of the cylinder.