Patent Application
20170197162
The present application claims the benefit of and priority to French Patent Application No. 1457288, filed Jul. 28, 2014, which is incorporated herein by reference in its entirety.
The present disclosure relates to filtration systems.
Internal combustion engines combust fuel (e.g., diesel fuel, gasoline, ethanol, etc.) to power or drive a component, such as a vehicle. Contaminants, such as water, dust, and other particulate matter, can damage the internal combustion engine if the contaminants are not removed prior to combustion. Accordingly, certain standard levels of fuel cleanliness are often required by the internal combustion engine in order to ensure the life of the engine, to prevent degradation of performance, and to ensure proper emissions standards are met. Many internal combustion engines rely on fuel filtration systems to provide clean and substantially water-free fuel to the internal combustion engine and its components (e.g., the fuel injectors). The fuel filtration systems generally include a filter element that filters particulate (e.g., dust and debris) from the fuel and separates dispersed water that may be contained in the fuel for later draining.
The filter elements of the fuel filtration systems typically have a limited life. As fuel is processed through a filter element, the filter element captures particulate contaminants and continues to do so until the restriction of the filter element reaches a threshold value (i.e., the restriction becomes too large for the fuel filtration system to efficiently provide clean fuel to the internal combustion engine). Accordingly, the filter elements are periodically replaced with replacement filter elements. As a cost saving measure, some internal combustion engine operators and servicers replace original filter elements with non-genuine replacement filter elements (e.g., off-brand or used filter elements that are not certified to provide filtered fuel according to the standard cleanliness levels). Additionally, some operators and services simply remove the original filter element when the original filter element become clogged and attempt to run the internal combustion engine without a replacement filter element. In each situation, the fuel delivered to the internal combustion engine may not meet the required fuel cleanliness standard and may cause damage to the internal combustion engine or negatively impact the environment (e.g., increase emissions levels). Still further, multi-stage filter cartridges are often wholly discarded and replaced despite certain stages having a longer lifespan than the other stages resulting in unnecessary replacement of the certain stages.
One embodiment relates to a filtration system for filtering a fluid and providing the filtered fluid to a component of an internal combustion engine. The filtration system includes a housing and a standpipe having a valve, the valve being biased towards a closed position that prevents the flow of fluid through the valve. A filter cartridge is removably received within the housing, the filter cartridge including a primary filter element and a screen assembly. The primary filter element includes a filter media for filtering the fluid, a first endcap, and a second endcap. The screen assembly includes a screen portion and an endcap portion. The endcap portion includes a valve interaction pin that interacts with the valve to open the valve and allow the fluid to flow through the valve when the filter cartridge is in an operating position within the housing. The valve interaction pin can also be formed as part of the screen, or it can be a stand-alone component.
These and other features, together with the organization and manner of operation thereof, will become apparent from the following detailed description when taken in conjunction with the accompanying drawings.
Referring to the figures generally, no-filter no-run filtration systems are described. The filtration systems include a valve positioned within a filter housing. The valve is normally biased in a open position when a filter cartridge is not inserted into the filter housing, unless there is a flow of fluid, in which case the fluid moves the valve to the closed position. When the valve is in the closed position, fuel from within the filter housing cannot flow to the fuel injectors of the internal combustion engine. The filter cartridge includes a main filter element and a hydrophobic screen assembly. The hydrophobic screen assembly includes a valve interaction pin that interacts with and opens the valve when the hydrophobic screen assembly is received in the filter housing in an operating position. Accordingly, fuel can only flow from the filter housing to the fuel injectors when the hydrophobic screen is received within the housing in an operating position. The hydrophobic screen is a separate component from the main filter element allowing for independent replacement of the main filter element and the hydrophobic screen.
A cross-sectional view of a filtration system 100 according to an exemplary embodiment is shown in
The filter cartridge 104 further includes a removable screen assembly 118. The screen assembly 118 includes a screen 120. The screen 120 is a hydrophobic screen. The screen 120 captures, coalesces, and drains water remaining in the fuel after the fuel has been passed through the primary filter element 108. In the embodiment of
The screen assembly 118 includes an endcap portion 122. In some arrangements, the endcap portion 122 is secured to the screen 120 through a snap-fit connection. In other arrangements, the endcap portion 122 is integral with the screen 120. The screen assembly 118 is removably received within the filter cartridge 104. The endcap portion 122 removably connects to the second endcap 116 of the primary filter element 108. The connection between the endcap portion 122 and the second endcap 116 may be formed by a snap-fit connection, a press-fit connection, a friction-fit connection, or the like. A seal 124 may be positioned between the endcap portion 122 and the second endcap 116 to seal the dirty side 110 from the clean side 112.
Still referring to
A close-up cross-sectional view of the screen assembly 118 is shown in
Referring to
As seen in the close-up cross-sectional view of the valve 126 with the filter cartridge 104 inserted into the housing in the operating position in
As described above, fuel only flows from the housing through the fuel supply line 132 when the valve interaction pin 134 opens the valve 126. The valve interaction pin 134 only opens the valve 126 when the screen assembly 118 is positioned in an operational position within the housing. Accordingly, fuel flows when the screen assembly 118 having the valve interaction pin 134 is in the installed position. The screen assembly 118 can only be in the installed position when the screen assembly 118 is installed into the filter cartridge 104, and the filter cartridge 104 is fully installed in the operational position within the housing. Accordingly, the positioning of the valve interaction pin 134 on the screen assembly 118 ensures that both filtration components (the screen assembly 118 and the primary filter element 108) are present. This prevents the internal combustion engine and its components, such as the fuel injectors, from receiving dirty fuel. Further, the multicomponent design of the filtration cartridge 104 having the separable primary filter element 108 and screen assembly 118 helps ensure that the appropriate filter cartridge components are used during service operations. If an improper component is used, fuel may not flow from the filtration system 100 to the internal combustion engine, thereby preventing potentially dirty fuel from entering the internal combustion engine.
Further, the screen assembly 118 may have a different lifespan than the primary filter element 108. Because the screen assembly 118 is a separate, stand-alone unit, the screen assembly 118 and the primary filter element 108 can be replaced independent of each other. For example, if the screen assembly 118 is designed to have a longer filtering lifespan than the primary filter element 108, an operator of the internal combustion engine can independently replace the primary filter element 108 multiple times before having to replace the screen assembly 118. Such an arrangement reduces the costs of replacement parts because customers only need to purchase one of the screen assembly 118 and the primary filter element 108, not both at the same time in arrangements where the screen assembly 118 and the primary filter element 108 are integrated. Additionally, such an arrangement reduces unnecessary waste, as both the primary filter element 108 and the screen assembly 118 can each be independently replaced based on their individual filtering capacities (e.g., their individual maximum contamination levels).
Referring to
Similar to the filter cartridge 104, the filter cartridge 606 includes a removable screen assembly 620. The screen assembly 620 includes a screen portion 622. The screen portion 622 includes a hydrophobic screen. The screen portion 622 captures, coalesces, and drains water remaining in the fuel after the fuel has been passed through the primary filter element 608. The screen portion 622 is substantially cylindrical in shape such that it can be inserted over the standpipe 618 and inside of the primary filter element 608. Accordingly, the screen portion 622 is positioned on the clean side 612 of the primary filter element 608. The screen assembly 620 is positioned inside of an opening formed within the primary filter element 608, and the standpipe 618 is positioned within an opening formed within the screen assembly 620 when the filter cartridge 606 is in the operating position (i.e., the primary filter element 608, the screen assembly 620, and the standpipe 618 are positioned in a nesting relationship when the filter cartridge 606 is in the operating position).
The screen assembly 620 includes an endcap portion 624. Unlike in the screen assembly 118 of system 100, the screen portion 622 and the endcap portion 624 are integral. The screen assembly 624 is removably received within the filter cartridge 606. The endcap portion 624 is removably received within the second endcap 616. The connection between the endcap portion 624 and the second endcap 616 may be formed by a snap-fit connection, a press-fit connection, a friction-fit connection, or the like. A seal 626 may be positioned between the endcap portion 624 and the second endcap 616 to seal the dirty side 610 from the clean side 612. The endcap portion 624 includes an enlarged chamber 628 to gather separated air.
Still referring to
Similar to filtration system 100, in filtration system 600, fuel only flows from the housing through the fuel supply line 636 when the valve interaction pin 638 opens the valve 630. The valve interaction pin 638 only opens the valve 630 when the screen assembly 620 is positioned in an operational position within the housing formed by the lower and upper shells 602 and 604. Accordingly, fuel flows when the screen assembly 620 having the valve interaction pin 638 is in the installed position. The screen assembly 620 can only be in the installed position when the screen assembly 620 is installed into the filter cartridge 606, and the filter cartridge 606 is fully installed in the operational position within the housing. Accordingly, the positioning of the valve interaction pin 638 on the screen assembly 620 ensures that both filtration components (the screen assembly 638 and the primary filter element 608) are present. This prevents the internal combustion engine and its components, such as the fuel injectors, from receiving dirty fuel. Further, the multicomponent design of the filtration cartridge 606 having the separable primary filter element 608 and screen assembly 620 helps ensure that the appropriate filter cartridge components are used during service operations. If an improper component is used, fuel may not flow from the filtration system 600 to the internal combustion engine, thereby preventing potentially dirty fuel from entering the internal combustion engine.
Further, the screen assembly 620 may have a different lifespan than the primary filter element 608. Because the screen assembly 620 is a separate, stand-alone unit, the screen assembly 620 and the primary filter element 108 can be replaced independent of each other. For example, if the screen assembly 620 is designed to have a longer filtering lifespan than the primary filter element 608, an operator of the internal combustion engine can independently replace the primary filter element 608 multiple times before having to replace the screen assembly 620. Such an arrangement reduces the costs of replacement parts because customers only need to purchase one of the screen assembly 620 and the primary filter element 608, not both at the same time in arrangements where the screen assembly 620 and the primary filter element 608 are integrated. Additionally, such an arrangement reduces unnecessary waste as both the primary filter element 608 and the screen assembly 620 can each be independently replaced based on their individual filtering capacities (e.g., their individual maximum contamination levels).
The above described filtration systems and filter cartridge arrangements are described in the context of fuel filters. However, similar concepts may be applied to other liquid filtering systems. For example, similar filtration systems may be applied to lubricant filtration systems, hydraulic fluid filtration systems, and the like.
As utilized herein, the terms “approximately,” “about,” “substantially,” and similar terms are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. It should be understood by those of skill in the art who review this disclosure that these terms are intended to allow a description of certain features described and claimed without restricting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the invention as recited in the appended claims.
It should be noted that the term “exemplary” as used herein to describe various embodiments is intended to indicate that such embodiments are possible examples, representations, and/or illustrations of possible embodiments (and such term is not intended to connote that such embodiments are necessarily extraordinary or superlative examples).
The terms “coupled,” “connected,” and the like as used herein mean the joining of two members directly or indirectly to one another. Such joining may be stationary (e.g., permanent) or moveable (e.g., removable or releasable). Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another.
References herein to the positions of elements (e.g., “top,” “bottom,” “above,” “below,” etc.) are merely used to describe the orientation of various elements in the FIGURES. It should be noted that the orientation of various elements may differ according to other exemplary embodiments, and that such variations are intended to be encompassed by the present disclosure.
It is important to note that the construction and arrangement of the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. Other substitutions, modifications, changes and omissions may also be made in the design, operating conditions and arrangement of the various exemplary embodiments without departing from the scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1457288 | Jul 2014 | FR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US15/41286 | 7/21/2015 | WO | 00 |
