Pressure-Responsive Throttle Assembly for Pneumatic Flow Limiting
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Solution Overview
Problem
Existing pressure control systems for vehicles with multi-stage compressors face challenges in coordinating compression performance and compressed volume flow, leading to potential overload and inefficient energy consumption.
Innovation Solution
A pressure control system with a throttle arrangement featuring controllable throttle valves that adjust based on inlet pressure to limit input volume flow, ensuring the output volume flow does not exceed a predetermined limit, thereby optimizing the operation of the multi-stage compressor by adjusting the effective cross-section of the throttle arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the multi-stage compressor operates without flow limitation, then the compression power and compressed volume flow can be maximized, but the pneumatic consumer may be overloaded and energy consumption becomes inefficient
Solution Approach 1:
The throttle arrangement is positioned upstream of the multi-stage compressor to pre-limit the input volume flow before the compression process begins. This preliminary flow limitation prevents the compressor and pneumatic consumer from being overloaded, while still allowing the system to operate at optimal compression performance within safe parameters.
2Reliability
If the throttle arrangement limits the input volume flow, then the pneumatic consumer is protected from overload, but the compressed volume flow may be reduced
Solution Approach 1:
The throttle valves in the throttle arrangement are designed to be adjustable, allowing the effective cross-section to be dynamically modified. This enables optimization of the balance between flow limitation for protection and sufficient compressed volume flow for productivity, adapting to different operating conditions and consumer requirements.
3Device complexity
If the throttle arrangement uses a fixed cross-section, then the structure is simple, but it cannot optimize energy consumption under varying operating conditions
Solution Approach 1:
The throttle arrangement incorporates adjustable throttle valves that allow modification of the effective cross-section based on operating conditions. This dynamic capability enables optimization of energy consumption by matching the flow limitation to the actual demands of the pneumatic consumer, preventing both overload and excessive energy use during normal operation.
Solution Approach 2:
The effective cross-section of the throttle arrangement is designed as a variable parameter that can be adjusted according to operating conditions. By changing this geometric parameter, the system optimizes the balance between flow rate and pressure, thereby minimizing energy consumption while maintaining reliable operation under varying loads.
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 solution prevents overload of the pneumatic consumer by limiting the input volume flow, optimizing energy consumption, and ensuring the multi-stage compressor operates close to its performance limit, thereby achieving efficient and reliable pressure control.
Implementation Method 1
an inlet volume flow (QE) of a pressure medium (A) entering the throttling arrangement can be limited to a limiting volume flow (QG) by controlling the at least one throttle valve (27.1), wherein the at least one controllable throttle valve (27.1) is switched, i.e., opened or closed, depending on an inlet pressure (pV)
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates to a throttle assembly (25) for a pressure control system having a pneumatic load in a vehicle, in particular a passenger car, said throttle assembly comprising at least one throttle valve (37, 27.i), the at least one throttle valve (31, 27.i) defining an assembly cross-section (AQ) of the throttle assembly (25), the assembly cross-section (AQ) specifying what flow resistance acts on a pressure medium (E) entering the throttle assembly (25). According to the invention, at least one throttle valve (27.i) can be controlled in accordance with a preliminary pressure (pV), the assembly cross-section (AQ) of the throttle assembly (25) being adjustable, by the control of the at least one controllable throttle valve (27.i), in such a way that an incoming volumetric flow rate (QE) of the pressure medium (E) entering the throttle assembly (25) can be limited to a limit volumetric flow rate (QG) in accordance with the preliminary pressure (pV), in order to set, in accordance with the preliminary pressure (pV), a power consumption of the pneumatic load in the pressure control system (1), which pneumatic load is connected to the throttle assembly (25).