Compressed Air Venting Control for Noise Reduction
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Solution Overview
Problem
Conventional compressed air treatment systems in vehicles produce high noise levels during the shutdown process due to venting, which is not effectively mitigated without dual-circuit systems with air recirculation.
Innovation Solution
A control device that step-wise controls the venting process by switching off and on the valve device at predetermined pressure values, using measured or preset data to manage the pressure drop, thereby reducing sound pressure levels without increasing venting time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous venting is performed during shutdown, then pressure is reduced efficiently, but sound pressure level increases significantly
Solution Approach 1:
The patent applies periodic action by switching the venting process between active and inactive states in cycles. The control device alternates between opening and closing the venting valve, creating periodic venting pulses that maintain pressure reduction while limiting continuous high-level noise emission during shutdown
2Object-affected harmful factors
If venting is switched off completely, then noise is eliminated, but pressure reduction is delayed
Solution Approach 1:
The patent segments the continuous venting process into multiple discrete phases or pulses. By dividing the venting operation into sequential segments with controlled duration and intensity, the system achieves pressure reduction over time while allowing noise to decrease between segments, balancing both time and noise considerations
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 achieves a complete pressure reduction through multiple partial vents, maintaining sound pressure within a desired range and reducing noise levels during the venting process.
Implementation Method 1
the pressure chamber is under a pressure originating from the ventilation of the valve device and/or the at least one compressed air consumer when it is in a pressurized state and is greater than atmospheric pressure
Implementation Method 2
switching a 3/2-way valve on and off in conjunction with a solenoid valve control
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a device and a method for controlling an air treatment system in a vehicle, wherein a valve device is controlled for the stepwise deactivation of a ventilation process in response to an attainment of predetermined pressure values and for the respective reactivation of the ventilation process after a predetermined time period has elapsed. Here, the deactivation and reactivation of the ventilation process may be performed multiple times upon the attainment of successive, preferably decreasing, predetermined pressure values of the ventilation pressure, until the attainment of a predetermined lower pressure threshold.