Valve Apparatus Diaphragm Venting Control
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Solution Overview
Problem
Existing pressure-actuated valve devices for motor vehicle brake systems, particularly in anti-lock braking systems, face challenges in venting the outlet valve quickly and completely, leading to prolonged venting times even during normal braking operations.
Innovation Solution
The valve device integrates a venting line for diaphragm valves connected to the control input of the relay valve, allowing for precise control of venting via electrically actuated valves, eliminating back pressure and enabling rapid and complete venting by directing the venting process through the control input of the relay valve, rather than a common venting channel with the brake cylinders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the outlet valve is vented via a common venting channel with the brake cylinders, then the venting structure is simple, but the venting time is too long due to dynamic pressure buildup
Solution Approach 1:
The patent segments the venting function into two separate paths: one for the outlet valve (via control input) and one for the brake cylinders (common venting channel). This allows the outlet valve to be vented independently and quickly without being constrained by the dynamics of the larger brake cylinder venting system, thereby reducing venting time while maintaining structural simplicity through dedicated routing.
Solution Approach 2:
The control input of the relay valve serves as an intermediary pathway for venting the outlet valve. By using this intermediate channel instead of the direct common venting channel, the system can control the venting process more precisely and avoid dynamic pressure buildup, achieving faster venting times without significantly increasing overall system complexity.
2Productivity
If the venting chamber is vented quickly to open the outlet valve fully, then the full opening cross section is available, but back pressure slows down the venting process
Solution Approach 1:
The patent extracts the outlet valve venting function from the common venting channel and creates a separate venting path through the control input. This separation removes the outlet valve venting process from the influence of back pressure generated in the common channel, allowing the venting chamber to be evacuated quickly and fully open the outlet valve without being slowed by back pressure effects.
3Extent of automation
If electrically actuatable valves are used to control venting, then precise pre-control is achieved, but the device complexity increases
Solution Approach 1:
The electrically actuatable valves are integrated into the existing relay valve assembly, where they control the venting of the outlet valve through the control input. This self-contained arrangement allows precise automated control of the venting process without requiring separate external control systems, thereby increasing automation extent while minimizing the addition of external 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
This configuration ensures quick and complete venting of the outlet valve, reducing venting times and maintaining the full opening cross-section for efficient operation, while also suppressing noise development during larger volume venting.
Implementation Method 1
a valve membrane as a closure element, which rests on a valve seat and opens against the pressure in a venting chamber of the inlet valve
Implementation Method 2
By venting the venting chamber, pressure conditions are created at the valve membrane of the outlet valve, which ensure the desired opening of the outlet valve
Data Source
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AI summary
The invention relates to a valve apparatus (1) for a pressure-operated system having a pressure medium input (7) and at least one pressure medium output (22). A relay valve (8) controls the pressure medium input (7) and can be operated by means of a control input (9). A pressure-operated inlet valve (23) is arranged between the relay valve (8) and the pressure medium output (22). The valve apparatus (1) comprises for each pressure medium output (22) a pressure-operated outlet valve (28), which controls a fluid connection of the pressure medium output (22) to a ventilation system (16) that leads outside, and for each pressure medium output (22) a pressure-operated inlet valve (23), which is arranged between the relay valve (8) and the pressure medium output (22). At least one outlet valve (28) and/or at least one inlet valve (23) is formed as a diaphragm valve and has a valve diaphragm (29) as the closure element, which rests on a valve seat (30) and opens against the pressure in a ventilation chamber (31). Each diaphragm valve is assigned an electrically operated ventilation valve (33), which controls a fluid connection of the ventilation chamber (31) to a ventilation line. To configure the valve apparatus in such a manner that the outlet valve (28) can be ventilated as quickly and completely as possible, the ventilation line (37) of at least one diaphragm valve is according to the invention fluid-connected to the control input (9) of the relay valve 8.