Hydraulic Brake Piston Bypass Valve for Low-Force Pressure Modulation
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Solution Overview
Problem
Existing hydraulic braking systems require the adjustable piston to overcome both pressure and area differences, leading to high energy consumption and complex design requirements.
Innovation Solution
A braking device with a piston that maintains equal pressures in both partial volumes, allowing it to be moved with minimal force and reduced energy consumption by integrating a check valve and bypass line within the piston, eliminating the need for large surface area differences and mechanical sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the first surface area of the piston is made larger than the second surface area to overcome pressure differences, then the piston can be moved against pressure differential, but the energy consumption and force requirement increase significantly
Solution Approach 1:
The patent applies equipotentiality by ensuring equal pressure distribution on both sides of the piston through the bypass line design. When the piston is in its initial position, the bypass line creates a pressure equilibrium, allowing the piston to be moved with minimal force and energy consumption, eliminating the need for large surface area differences.
Solution Approach 2:
The bypass line acts as an intermediary element that mediates the pressure relationship between the first and second partial volumes. It provides a pressure equalization path that reduces the force differential across the piston, thereby reducing the energy required for piston movement.
2Volume of moving object
If a bypass line is integrated within the piston, then the installation space is reduced, but the piston design becomes more complex
Solution Approach 1:
The patent merges the bypass line with the piston structure, integrating the pressure equalization function directly into the piston body. This combination reduces the overall installation space by eliminating separate bypass components while the internal integration manages the design complexity through unified construction.
Solution Approach 2:
The piston is designed with multi-functionality, serving both as the moving element for volume adjustment and as the housing for the bypass line. This universal design consolidates multiple functions into a single component, reducing installation space while distributing the complexity across a unified structure.
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 reduces energy consumption and simplifies the design while maintaining functionality, enabling efficient brake pressure modulation and hydraulic decoupling with reduced installation space.
Implementation Method 1
with equal pressures in both partial volumes
Implementation Method 2
A check valve (22) is arranged in the bypass line (20), which can be switched by means of the piston (10)
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates to a brake device for a hydraulic brake system of a vehicle with a piston (10) which can be adjusted within an accumulator volume (12) and divides the accumulator volume (12) into a first part volume (12a) and into a second part volume (12b), wherein a brake cylinder (16) which is device-inherent or device-external is attached or can be attached to the first part volume (12a), and a wheel brake cylinder (18) which is device-inherent or device-external is attached or can be attached to the second part volume (12b), and with a bypass line (20), wherein a check valve (22) which is arranged in the bypass line (20) can be switched by means of the piston (10) in such a way that the check valve (22) is in an open state at least in the case of the piston (10) being in its normal position, and is switched into a closed state by means of the piston (10) which is adjusted out of its normal position by at least one minimum adjustment travel. The present invention further relates to a method for operating a hydraulic brake system of a vehicle.