Filter Closure Element Bypass Valve for Pressure Relief
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Solution Overview
Problem
Filter devices in motor vehicles often experience excessive oil pressure on the raw side, which can lead to damage if the maximum permissible pressure is exceeded, and there is a risk of oil leakage during filter element replacement.
Innovation Solution
A closure element with a bypass channel and a valve element that adjusts between closed and open positions to relieve pressure by allowing fluid to flow from the raw side to the clean side when the pressure exceeds a threshold, and allows simultaneous emptying of both sides for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter device is used to filter oil in motor vehicles, then the oil filtering function is achieved, but the oil pressure on the raw side may rise excessively and cause damage to the filter device
Solution Approach 1:
A bypass channel is pre-configured in the closure element that can activate before damage occurs. When oil pressure exceeds a predetermined threshold, the valve element automatically opens to allow oil to flow through the bypass channel from the raw side to the clean side, relieving excess pressure before it can cause damage to the filter device or filter element.
Solution Approach 2:
The bypass channel with valve element acts as an intermediary pressure relief mechanism. It provides an alternative flow path that activates when normal filtering operation causes excessive pressure buildup, allowing oil to bypass the filter element temporarily and protect the system from pressure-related damage.
2Ease of repair
If the housing cover is removed to replace the filter element, then maintenance can be performed, but dirty oil and filtered oil can leak out in an uncontrolled manner
Solution Approach 1:
Before filter element replacement, the closure element can be partially opened or the bypass channel activated to allow controlled draining of oil from both the raw side and clean side. This preliminary oil removal prevents uncontrolled leakage when the housing cover is subsequently removed for maintenance.
Solution Approach 2:
The bypass channel system enables self-draining capability. When the valve element is opened during maintenance preparation, oil automatically flows through the bypass channel from both sides of the filter element to the outside or to a collection point, eliminating the need for separate draining operations and preventing uncontrolled leakage during maintenance.
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
Prevents damage from excessive oil pressure and facilitates safe replacement of the filter element by reducing the risk of oil leakage, while providing a cost-effective and space-efficient pressure relief mechanism.
Implementation Method 1
when a maximum permissible fluid or oil pressure is exceeded in the unfiltered side of the filter device, the valve element opens, i.e. is adjusted to the open position. In this position, the bypass channel is released so that the fluid or oil can flow directly to the clean side of the filter device.
Data Source
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AI summary
The invention relates to a filter device (1), in particular for a motor vehicle, comprising: - a filter housing (2), - a housing cover (3) attached to the filter housing (2), which has a housing cover drain opening (4), - a filter element (5) connectable or connected to the housing cover (3), which has a filter element drain opening (6) and, in a state mounted in the filter housing (2), separates a raw side (7) from a clean side (8) in the filter housing (2), - a closing element (9) attached to the housing cover (3), which closes both the housing cover drain opening (4) and the filter element drain opening (6), - a bypass channel (31) provided on a closing element main body (30) of the closing element (9), which, in a state of the closing element (9) attached to the housing cover (3), fluidically connects the raw side (7) with the clean side (8),- with a valve element (32) provided in the main body (30) of the closure element, which is adjustable between a closed position and an open position.