Hydraulic Brake Distributor With Cutoff Valve for Pulse Isolation
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Solution Overview
Problem
Current hydraulic brake distributors for two-wheeled vehicles experience a hydraulic pulse that can cause the first actuated brake control to feel like it is releasing when the second brake control is actuated simultaneously, leading to an unintended sensation of brake release.
Innovation Solution
A hydraulic brake distributor design featuring a cutoff valve and a floating piston valve element that isolates the first brake from the second brake control's action, ensuring independent operation and preventing the hydraulic pulse from affecting the first actuated brake control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single piston valve element is used to control both brakes simultaneously, then combined braking function is achieved, but hydraulic pulse from one control affects the other control causing unintended brake release sensation
Solution Approach 1:
The single piston valve element is divided into two separate piston valve elements (first and second piston valve elements). Each piston valve element independently controls one brake, eliminating the hydraulic pulse interference that occurred with the single piston design. This segmentation allows each brake control to operate independently without affecting the other.
Solution Approach 2:
A hydraulic distributor body with separate internal cavities and channels acts as an intermediary structure. The first internal cavity receives brake fluid from the first inlet and directs it to the first outlet, while the second internal cavity receives brake fluid from the second inlet and directs it to the second outlet. This intermediary structure isolates the hydraulic circuits to prevent pulse transmission between controls.
2Adaptability or versatility
If brake fluid from one control flows through a shared cavity, then combined braking is enabled, but overpressure from one control creates a return pulse to the first control
Solution Approach 1:
The shared cylindrical cavity is segmented into two separate internal cavities (first and second internal cavities). Each cavity is dedicated to one brake control circuit, preventing the overpressure-induced return pulse from affecting the other control. The segmentation isolates the harmful hydraulic pulse within its own circuit.
Solution Approach 2:
The harmful hydraulic pulse is extracted from the main flow path by providing separate inlet and outlet channels for each brake control. The first inlet and first outlet are hydraulically connected without passing through the second control's circuit, thereby removing the source of pulse interference from the system.
3Ease of operation
If two separate valve elements are used to prevent pulse interference, then control independence is improved, but device complexity increases
Solution Approach 1:
While using two separate piston valve elements for independence, the design merges them into a single integrated distributor body with a unified structure. The first and second piston valve elements are positioned within the same housing and share common mounting features, reducing overall assembly complexity compared to completely separate valve units.
Solution Approach 2:
The distributor body serves multiple functions: it houses both piston valve elements, provides separate inlet and outlet channels for each control, manages brake fluid distribution, and isolates hydraulic pulses. This multi-functionality reduces the need for additional separate components, offsetting the complexity of having two valve elements.
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 effectively prevents the user from feeling the second brake control's action on the first actuated brake control, maintaining consistent braking force and sensation, even when both controls are actuated simultaneously.
Implementation Method 1
a cutoff valve (18) arranged within the first internal cavity (14) and actuable in response to brake fluid being sent to the second inlet (16) so as to interrupt the fluid communication through the branch channel (22)
Implementation Method 2
a floating piston valve element (31, 32) which is longitudinally received in the second internal cavity (15) and movable in response to a change in the volume of the hydraulic chamber (36)
Data Source
AI summary
A hydraulic brake distributor comprises a first inlet (11) which may be hydraulically connected to a first brake control of a vehicle, a second inlet (16) which may be hydraulically connected to a second brake control of the vehicle, a first outlet (12) which may be hydraulically connected to a first brake of the vehicle, a second outlet (17) which may be hydraulically connected to a second brake of the vehicle, a first channel (13) which sets the first inlet (11) and the first outlet (12) in direct fluid communication, a branch channel (22) which sets the first channel (13) in fluid communication with a first internal cavity (14), and a cutoff valve (14, 18, 24) which is arranged within the first internal cavity (14) and may be actuated in response to brake fluid being sent to the second inlet (16) so as to interrupt the fluid communication through the branch channel (22).