Protection Valve Parallel Safety Valves Time Lag Sequence
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Solution Overview
Problem
Conventional protection valves for vehicle brake systems are thick due to complex circuit configurations with safety valves connected in series, which complicates the flow paths and increases the thickness of the valve body, making it difficult to achieve a thinner design while maintaining a regular sequence of valve opening.
Innovation Solution
A protection valve design with safety valves arranged in parallel and a time lag-creating valve having a higher opening pressure than the first safety valve, ensuring the second safety valve opens with a time lag after the first, without increasing the valve body thickness, by branching the air flow path and using partition walls and valve elements to control pressure and sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety valves are connected in series to maintain regular sequence of valve opening, then the reliability of valve opening sequence is improved, but the valve body thickness increases and device complexity increases
Solution Approach 1:
The patent transitions from a series connection (one-dimensional sequential arrangement) to a parallel connection with time lag control (utilizing time as an additional dimension). By arranging safety valves in parallel and controlling their opening sequence through time lag mechanisms, the valve body thickness is reduced while maintaining reliable sequential opening through temporal control rather than spatial arrangement.
Solution Approach 2:
The patent changes the control parameter from spatial arrangement (series connection position) to temporal parameter (opening time lag). By controlling the opening pressure and time lag of valves rather than their physical arrangement, the system achieves reliable sequential opening with a thinner valve body structure.
2Reliability
If safety valves are connected in series to ensure regular opening sequence, then the valve opening control is improved, but the circuit configuration complexity increases
Solution Approach 1:
The patent moves from spatial control (series connection) to temporal control (parallel connection with time lag). By utilizing time as an additional control dimension, the circuit configuration is simplified while maintaining reliable sequential valve opening through temporal sequencing rather than complex spatial arrangement.
Solution Approach 2:
Instead of controlling valve opening sequence through spatial arrangement (series connection), the patent inverts the approach by using parallel connection with temporal control. This inversion simplifies the circuit configuration while achieving the same reliable sequential opening control through time lag mechanisms.
3Length of stationary object
If safety valves are arranged in parallel with time lag control, then the valve body thickness is reduced and design freedom is increased, but the complexity of pressure control mechanism increases
Solution Approach 1:
The patent changes the control approach from spatial arrangement to temporal parameter control. By adjusting opening pressure and time lag parameters of individual valves rather than arranging them in series, the valve body thickness is reduced while the pressure control mechanism complexity is managed through parameter optimization rather than structural 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 design maintains the regular sequence of valve opening without complicating the valve body structure, allowing for a thinner protection valve with increased design freedom and reduced thickness, effectively addressing the need for a thinner, more efficient valve configuration.
Implementation Method 1
a time lag-creating valve having an opening pressure higher than an opening pressure of the first safety valve is provided at an upstream side of the second safety valve
Data Source
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AI summary
An object is to provide a thinner protection valve with a regular sequence of valve opening. For a purpose of accomplishing the object, a protection valve 1 includes: an input chamber (a) into which air is introduced; a plurality of output ports P21 to P29 through which air is discharged; and safety valves which open in response to a pressure increase on a primary side or close in response to a pressure decrease on a secondary side, the safety valves including a safety valve PV21 provided corresponding to the output port P21 and a safety valve PV23 provided corresponding to the output port P23. An air flow path from the input chamber (a) is branched into a first branch line (b) and a second branch line (c), and a time lag-creating valve TMV having an opening pressure higher than the safety valve PV21 is provided at a upstream side of the safety valve PV23 in the second branch line (c), so that the safety valve PV23 can open with a time lag after the safety valve PV21 opens, regardless of the difference between the opening pressure of the safety valve PV21 and the opening pressure of the second the safety valve PV23.