JP2016053329A - Fuel filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel filter device that can facilitate mounting of an additive element .SOLUTION: A fuel filter device 2 includes a basic element 31 and an additive element 32. The additive element 32 is attachable/detachable to/from the basic element 31. A spring 26 and a movable member 27 push up the additive element 32 from the lower side. When the additive element 32 is mounted, fuel passes through the additive element 32 and then, flows through the filter element 42. When the additive element 32 is not mounted, the spring 26 pushes up the movable member 27 so that a valve element portion 29 comes into contact with an opening 47 of a center pipe 45. As a result, the opening 47 is closed by the valve element portion 29, which prevents the fuel from flowing.SELECTED DRAWING: Figure 1

Description

  The invention disclosed herein relates to a fuel filter device that can include additional elements in addition to a filter element that filters fuel.

  Patent Document 1 describes a fuel filter device including a filter element for filtering fuel and an additional element. An example of an additional element is a moisture collector that captures and collects moisture in the fuel.

JP 2010-223028 A

  When the additional element and the filter element are configured to be separable, only the filter element may be mounted in the fuel filter device. In this case, the function provided by the additional element, for example the moisture collecting function, is impaired. For this reason, the fuel filter device may be used over a long period of time without performing its intended function.

  In view of the above, or other aspects not mentioned, there is a need for further improvements in fuel filter devices.

  One of the objects of the invention is to provide a fuel filter device that can stop or suppress the supply of fuel in the absence of additional elements.

  Another object of the invention is to provide a fuel filter device that allows a user to recognize that there are no additional elements.

  Yet another object of the invention is to provide a fuel filter device that can facilitate the attachment of additional elements.

  The invention disclosed herein employs the following technical means to achieve the above object. Note that the reference numerals in parentheses described in the claims and in this section indicate a corresponding relationship with specific means described in the embodiments described later as one aspect, and limit the technical scope of the invention. Not what you want.

  According to one of the disclosed inventions, a fuel filter device is provided. The present invention relates to a fuel filter device capable of accommodating a basic element (31) including a filter element for filtering fuel flowing in a fuel passage and an additional element (32) disposed in the fuel passage and providing an additional function. In the absence of an additional element (32), characterized in that it comprises a valve body part (29) which at least partly closes the fuel passage.

  According to this configuration, the fuel passage is at least partially closed when the fuel filter device is used without accommodating additional elements. For this reason, when there is no additional element, supply of fuel can be stopped or suppressed. In some cases, the reduction in the amount of fuel can make the user aware that there are no additional factors. In addition, the attachment of additional elements may be facilitated.

1 is a cross-sectional view of a fuel filter device according to a first embodiment of the invention. It is sectional drawing of the fuel filter apparatus which does not have the additional element of 1st Embodiment.

  A plurality of modes for carrying out the invention disclosed herein will be described with reference to the drawings. In each embodiment, portions corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals and redundant description may be omitted. Further, in the following embodiments, the correspondence corresponding to the matters corresponding to the matters described in the preceding embodiments is indicated by adding reference numerals that differ only by one hundred or more, and redundant description may be omitted. . In each embodiment, when only a part of the structure is described, the other parts of the structure can be applied with reference to the description of the other forms.

(First embodiment)
FIG. 1 shows a cross section of a fuel filter device 2 in a fuel supply device 1 mounted on a vehicle. In the figure, the fuel flow direction is indicated by a thick arrow. The fuel supply device 1 supplies fuel from the fuel tank 3 to an internal combustion engine (EG) 4 as a fuel consuming device. The internal combustion engine 4 is a diesel engine using light oil as fuel. The internal combustion engine 4 is provided with a high-pressure fuel pump that is also a part of the fuel supply device 1 and a fuel injection valve.

  The fuel supply device 1 includes a low pressure pump 5 that assembles fuel in the fuel tank 3. The fuel pressurized by the low pressure pump 5 is supplied to the fuel filter device 2. The fuel filter device 2 includes a holding bracket 6 and a filter unit 7.

  The holding bracket 6 is made of an aluminum alloy. The holding bracket 6 is fixedly installed on the vehicle. The holding bracket 6 provides a fuel flow path. The holding bracket 6 has a fuel inlet 11 and a fuel outlet 12. The holding bracket 6 has an inlet passage 13 extending from the inlet 11. The inlet passage 13 provides a part of the dirty side region through which unfiltered fuel flows. The holding bracket 6 has an outlet passage 14 extending from the outlet 12. The outlet passage 14 provides a portion of the clean side region through which filtered fuel flows.

  The holding bracket 6 is also a member that provides a case for housing the filter unit 7. The holding bracket 6 includes a case that can accommodate the filter unit 7. The holding bracket 6 has a cap 21 and a cup 22 for providing a case. The cap 21 and the cup 22 are configured to be detachable. The cap 21 provides a first case portion that is fixedly disposed. The cup 22 provides a detachable second case portion.

  The holding bracket 6 is also a member that defines a passage for fuel to be filtered by the filter unit 7. The cap 21 and the cup 22 define a cavity as a passage for the fuel to be filtered therein. The cap 21 and the cup 22 define a chamber including the dirty side region DS and the clean side region CS. An entrance passage 13 communicates with the dirty side region DS. An exit passage 14 communicates with the clean side region CS.

  A connecting mechanism 23 is provided between the cap 21 and the cup 22 to removably connect them. The coupling mechanism 23 is provided by a screw mechanism including a female screw provided on the cap 21 and a male screw provided on the cup 22. The coupling mechanism 23 can include a seal member that provides a seal between the cap 21 and the cup 22. In the illustrated example, an O-ring is employed as the seal member.

  A drain hole 24 and a drain plug 25 are provided at the bottom of the cup 22. The drain hole 24 and the drain plug 25 provide a discharge mechanism for discharging moisture and foreign matter accumulated at the bottom of the cup 22.

  Furthermore, a support mechanism for positioning and supporting the filter unit 7 at a regular position is provided inside the cup 22. The support mechanism has a spring 26 as an elastic support member disposed on the bottom surface of the cup 22. The spring 26 is a coil spring. The support mechanism includes a movable member 27 that can be moved in the vertical direction in the cup 22 by being supported by a spring 26. The spring 26 can be expanded and contracted along the axial direction in a cylindrical chamber defined by the cap 21 and the cup 22. Therefore, the movable member 27 is also movable in the axial direction. The inner diameter of the spring 26 is sufficiently larger than the drain hole 24. The spring 26 and the cup 22 are connected. The spring 26 and the movable member 27 are connected.

  The spring 26 has a free length that allows the movable member 27 to be pushed up to contact the center pipe 45 in the absence of the additional element 32. The spring 26 may have a free length that allows the movable member 27 to be pushed up so as to contact the upper surface of the holding bracket 6 when the filter unit 7 is not provided.

  The movable member 27 is a disk-shaped plate member. The movable member 27 is disposed so as to be in contact with the additional element 32. The movable member 27 has an umbrella-shaped outer edge 28 provided on the outer edge in the radial direction. The outer edge 28 is formed so as to spread from top to bottom. The outer edge 28 allows moisture and foreign matter to flow smoothly from top to bottom in the cup 22. On the other hand, the outer edge 28 suppresses the blowing of moisture and foreign matter from below the movable member 27 to above the movable member 27.

  The movable member 27 provides a support member that receives and supports the lower part of the filter unit 7 by the whole or a part thereof. In the illustrated example, the movable member 27 receives the filter unit 7 by its disk-shaped portion.

  The movable member 27 has a valve body portion 29 that can at least partially close an opening 47 of a center pipe 45 described later. The valve body portion 29 can completely close the opening 47. The valve body portion 29 is provided at a position facing the opening 47. The valve body portion 29 is urged toward the opening 47 by the spring 26. The valve body portion 29 includes a conical protrusion provided on a part of the movable member 27. The conical protrusion provides a plug that can be partially inserted into the opening 47. The valve body portion 29 is provided at the center of the movable member 27. The valve body portion 29 is arranged so as to be in contact with the additional element 32. The valve body portion 29 is configured to be movable between the first position and the second position. The valve body portion 29 moves away from the opening 47 against the spring 26 when there is an additional element 32. The valve body portion 29 moves to a first position that opens the fuel passage by contacting the additional element 32. The valve body portion 29 moves to a second position at least partially closing the fuel passage when there is no additional element 32 and no contact with the additional element 32. This configuration allows the fuel passage to be opened and closed by directly manipulating the valve body portion 29 with the additional element 32.

  The filter unit 7 is detachably attached to the holding bracket 6. The filter unit 7 is replaceable. The filter unit 7 is attached to the open end of the cup 22. The cup 22 with the filter unit 7 attached is inserted into the cap 21, and the cap 21 and the cup 22 are connected by the connecting mechanism 23, so that the filter unit 7 is positioned at a normal position. At the regular position, the filter unit 7 is accommodated between the cap 21 and the cup 22 so as to partition the dirty side region DS and the clean side region CS.

  The filter unit 7 includes a basic element 31 that provides a basic function of the fuel filter device 2 and an additional element 32 that provides an additional function. The basic element 31 is a filter that removes foreign matter by filtering fuel. The additional element 32 is a moisture trap that captures, collects, and settles water droplets from the fuel in the dirty side region DS.

  The basic element 31 has a frame 41. The frame 41 is a member that partitions the dirty side region DS and the clean side region CS when disposed between the cap 21 and the cup 22. Furthermore, the frame 41 is also a member that defines a filtration passage that allows fuel to flow from the dirty side region DS to the clean side region CS.

  The frame 41 is also a member for supporting the filter element 42. The filter element 42 is formed of a filter medium for filtering fuel. The filter element 42 is disposed across the filtration passage. The filter element 42 filters the fuel flowing through the filter passage. The filter element 42 is formed in a substantially cylindrical shape. The filter element 42 includes a number of cylinders formed of a filter medium. Many cylinders are bundled in a cylindrical shape. Many cylinders filter fuel by flowing fuel along the axial direction of the cylinder. The filter element 42 is an axial flow type filter. In the illustrated example, the fuel flows from the lower end to the upper end of the filter element 42.

  The frame 41 includes a cover part 43, a connection part 44, and a center pipe 45. The cover portion 43 is connected to the filter element 42 so as to cover the outflow end of the filter element 42. The radially outer edge of the cover portion 43 is in sealing contact with the case provided by the cap 21 and the cup 22.

  The connecting portion 44 is connected to the wall surface of the holding bracket 6 in a sealed state. The connection portion 44 is provided with an O-ring as a seal member. The connecting portion 44 is positioned between the opening end of the inlet passage 13 and the opening end of the outlet passage 14 in the holding bracket 6. The connection portion 44 is also a member that partitions the dirty side region DS and the clean side region CS.

  The center pipe 45 is a cylindrical member that extends so as to penetrate the center of the filter element 42 along the axial direction. The center pipe 45 defines an inlet passage extending in the axial direction from the radially inner side of the connection portion 44 in the center pipe 45. The center pipe 45 has a connecting portion 46 connected to the additional element 32. The connecting portion 46 is provided on the outer surface of the protruding portion of the center pipe 45 protruding from the filter element 42. Further, the center pipe 45 has an opening 47 at its tip. The center pipe 45 is also an opening partition member that partitions an opening 47 as a fuel passage in the case. The opening 47 opens in the center of the case where the cap 21 and the cup 22 are partitioned. The opening 47 is surrounded by an edge perpendicular to the expansion / contraction direction of the spring 26, that is, the moving direction of the movable member 27.

  A connecting mechanism 48 for temporarily fixing the filter unit 7 to the cup 22 is provided between the outer edge in the radial direction of the cover portion 43 and the cup 22. The connection mechanism 48 can also be called a temporary fixing mechanism or a locking mechanism. The coupling mechanism 48 allows the filter unit 7 to be temporarily fixed in the cup 22 by engaging the opening end of the cup 22 and the cover portion 43. The coupling mechanism 48 allows the filter unit 7 to be positioned in the cup 22 while the spring 26 is in a compressed state. The coupling mechanism 48 allows the basic element 31 and the additional element 32 to be accommodated in the cup 22 against the spring 26 and temporarily fixed to the cup 22.

  The coupling mechanism 48 temporarily fixes the filter unit 7 so as to be slightly movable along the axial direction. The coupling mechanism 48 is provided by a rotation lock mechanism that engages the cover portion 43 and the cup 22 by rotating the cover portion 43. With this configuration, when the cup 22 is separated from the cap 21, the filter unit 7 is prevented from popping out. Moreover, it is avoided that the operation | work which connects the cup 22 to the cap 21 is prevented by the filter unit 7.

  The additional element 32 is formed as a cylindrical container. The additional element 32 receives fuel from the opening 47 and exerts physical and / or chemical effects on the fuel. The additional element 32 can be arranged between the center pipe 45 and the valve body part 29.

  The additional element 32 has a fiber layer 51 that traps and agglomerates minute water droplets dispersed in the fuel. The fiber layer 51 is formed of fibers having physical characteristics suitable for capturing water droplets and chemical characteristics. The fiber layer 51 captures moisture and grows the size of water droplets. The fiber layer 51 aggregates water droplets. Furthermore, the fiber layer 51 separates water droplets that have grown and have grown large, and settles them in the cup 22. Patent Document 1 can be referred to for the configuration of the fiber layer 51. In this case, the description of Patent Document 1 is introduced into this specification by reference.

  The additional element 32 has an upper body 52 and a lower body 53 that form a case for housing the fiber layer 51. The fiber layer 51 is held between the upper body 52 and the lower body 53. The upper body 52 and the lower body 53 are connected by a snap fit which is a fitting mechanism using elastic deformation of members.

  The upper body 52 is a cylindrical member with a large lower end. The upper body 52 defines an inlet 54 that receives fuel from the center pipe 45. The upper body 52 defines a plurality of outlets for discharging the fuel that has passed through the fiber layer 51 on the radially outer side.

  The upper body 52 has a connecting member 56 for connecting the additional element 32 to the center pipe 45. The connecting member 56 extends upward from the container-like main body portion of the upper body 52, that is, along the axial direction of the center pipe 45. The connecting member 56 provides a larger inner diameter than the connecting portion 46 so as to receive the connecting portion 46 of the center pipe 45.

  The connection part 46 and the connection member 56 provide the connection mechanism 57 which connects the basic element 31 and the additional element 32 so that attachment or detachment is possible. The connection part 46 has a latching protrusion on the cylindrical outer surface. The connecting member 56 has a locking projection on its inner surface. These locking projections can be engaged with each other. The connecting portion 46 and the connecting member 56 provide a snap-fit mechanism that fits them together using elastic deformation of the members. The connecting portion 46 and the connecting member 56 allow a slight movement of the additional element 32 along the axial direction of the center pipe 45. The connecting portion 46 and the connecting member 56 are configured to position the additional element 32 at the distal end portion of the center pipe 45 even when the additional element 32 is pushed toward the basic element 31.

  In this configuration, the basic element 31 is supported by the case, that is, the cup 22. The additional element 32 can be attached to and detached from the basic element 31 and can be said to be supported by the case via the basic element 31. The movable member 27 and the spring 26 push the additional element 32 upward from below. According to this configuration, the additional element 32 cannot be attached without the basic element 31. On the other hand, the basic element 31 can be mounted without the additional element 32. Thus, the basic element 31 may be attached without the additional element 32. In such a configuration, it is important to inform the user that there are no additional elements 32.

  The lower body 53 is formed and arranged so as to close the opening end of the upper body 52. A guide portion 58 that guides the fuel toward the fiber layer 51 is formed at the center of the lower body 53. The guide portion 58 is provided by a truncated cone portion that protrudes toward the inside of the case formed by the upper body 52 and the lower body 53. The recess provided by the guide portion 58 on the outer surface of the lower body 53 has a shape capable of accommodating a conical protrusion that provides the valve body portion 29. The recesses and protrusions provide a positioning mechanism that positions the additional element 32 in a proper position on the movable member 27.

  The holding bracket 6, the cap 21, the cup 22, the drain plug 25, the movable member 27, the frame 41, the upper body 52, and the lower body 53 can be formed of a resin material or a metal such as aluminum. In a preferred embodiment, the frame 41, the upper body 52, and the lower body 53 are made of resin.

  In the illustrated normal mounting state, the frame 41 is supported between the holding bracket 6 and the cup 22. The basic element 31 and the additional element 32 are connected by a connecting portion 46 and a connecting member 56. The additional element 32 is in contact with the movable member 27. The spring 26 is placed in compression by an additional element 32 and a movable member 27. Thus, the spring 26 pushes up the movable member 27 toward the additional element 32. In other words, the spring 26 pushes the additional element 32 towards the center pipe 45. As a result, in a state where the filter unit 7 is accommodated in the holding bracket 6, the additional element 32 is pressed against the center pipe 45 and stably supported.

  In the normal mounting state, the fuel is supplied from the inlet 11 through the inlet passage 13 into the center pipe 45. The fuel flows into the additional element 32 from the opening 47 of the center pipe 45. The fuel passes through the fiber layer 51. At this time, moisture in the fuel is captured. The fuel flows out of the additional element 32 radially outward. The fuel flows in the cup 22 from bottom to top. At this time, the fuel is filtered by the filter element 42. The fuel flows into the filter element 42 from the lower end face of the filter element 42. The fuel flows from the upper end face of the filter element 42 via a passage (not shown) formed in the cover portion 43. The fuel flows out into the outlet passage 14 via the chamber between the cover portion 43 and the holding bracket 6 and is supplied to the internal combustion engine 4 from the outlet 12.

  FIG. 2 shows the state without the additional element 32. The additional element 32 is separable from the filter unit 7. For this reason, only the basic element 31 may be attached to the holding bracket 6 without attaching the additional element 32.

  When the additional element 32 is not mounted, the spring 26 pushes up the movable member 27 so as to collide with the center pipe 45. The valve body portion 29 closes the opening 47. At this time, the conical protrusion provides self-alignment between the valve body portion 29 and the opening 47. Therefore, the opening 47 is reliably closed by the valve body portion 29.

  In the absence of the additional element 32, the gap between the inlet 11 and the outlet 12 is closed by a valve mechanism provided by the opening 47 and the valve body part 29. Fuel flow is blocked. When the fuel does not flow, the internal combustion engine 4 is not supplied with sufficient fuel to be operated. Therefore, the user can know the abnormality from the operating state of the internal combustion engine 4. In particular, it can be seen that there are no additional elements 32. In addition, the operating state of the internal combustion engine 4 prompts the user to install the additional element 32.

  According to this embodiment, the cap 21 and the cup 22 constitute a case that can accommodate the basic element 31 and the additional element 32. The cap 21 and the cup 22 are detachable from each other. A center pipe 45 is disposed in the case. The center pipe 45 forms a fuel passage extending from the cap 21 into the cup 22 and defines an opening 47 in the cup 22. A spring 26 is provided in the cup 22. The spring 26 movably supports the valve body portion 29 in the cup 22 and biases the valve body portion 29 toward the direction of closing the opening 47.

  The additional element 32 can be disposed between the opening 47 and the valve body portion 29 by being detachable from the distal end portion of the center pipe 45. As a result, the valve body portion 29 moves to the first position where the additional element 32 opens the opening 47 when the additional element 32 is present. The valve body portion 29 moves to a second position at least partially closing the opening 47 in the absence of the additional element 32. Thereby, when there is no additional element 32, the flow of fuel in the fuel passage can be suppressed or stopped.

  The basic element 31 includes a frame 41 that supports the filter element 42 and partitions the dirty side region DS and the clean side region CS by contacting the case. A connecting mechanism 48 is provided between the basic element 31 and the cup 22 to connect the basic element 31 and the cup 22 so that the basic element 31 is accommodated in the cup 22 against the spring 26. Here, the center pipe 45 is a part of the frame 41, and the basic element 31 and the additional element 32 can be connected.

  The basic element 31 can be accommodated in the cup 22 by compressing the spring 26 while the valve body 29 is positioned in the second position by bringing the center pipe 45 into contact with the valve body 29. It is. The filter unit 7, in which the basic element 31 and the additional element 32 are connected, compresses the spring 26 while positioning the valve body portion 29 in the first position by the additional element 32, so that the entire filter unit 7 is cupped. 22 can be accommodated. Thereby, the valve body part 29 can be moved according to the presence or absence of the additional element 32.

(Other embodiments)
The invention disclosed herein is not limited to the embodiments for carrying out the invention, and can be implemented with various modifications. The disclosed invention is not limited to the combinations shown in the embodiments, and can be implemented in various combinations. Embodiments can have additional parts. The portion of the embodiment may be omitted. The parts of the embodiments can be replaced or combined with the parts of the other embodiments. The structure, operation, and effect of the embodiment are merely examples. The technical scope of the disclosed invention is not limited to the description of the embodiments. Some technical scope of the disclosed invention is indicated by the description of the claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the claims. It is.

  In the said embodiment, the moisture collector was employ | adopted as an additional element. Instead, various elements that give the fuel filter device an additional function other than the filtration function of the basic elements can be employed. For example, the additional element is an element that exerts a physical and / or chemical action other than filtration on the fuel. For example, a member for adding an additive to the fuel in the fuel filter device, an additional filter element, a member for guiding the flow of fuel in the fuel filter device, and the like can be employed as the additional element.

  In the above embodiment, the valve body portion 29 completely closes the opening 47. Alternatively, the valve body portion 29 and the opening 47 may be formed so that the valve body portion 29 partially closes the opening 47. Such a configuration allows a suppressed amount of fuel to flow even in the absence of additional elements.

  In the above embodiment, the valve body portion 29 is formed on a part of the movable member 27. Instead of this, the movable member 27 may be formed so as to provide only the valve body portion 29.

  In the above embodiment, a coil spring is used to urge the valve body portion 29 toward the opening 47. Instead, various springs such as a leaf spring and a spiral spring can be employed.

  In the above embodiment, the valve body portion 29 for opening and closing the opening 47 is provided in the cup 22. Instead of this, the valve body portion 29 may be provided on the center pipe 45. The valve body portion 29 can be configured to be manipulated by the additional element 32. For example, the valve body portion 29 is configured to move to a position where the opening 47 is opened when the additional element 32 is mounted, and to a position where the opening 47 is closed when the additional element 32 is not mounted. can do.

  In the above embodiment, a snap-fit mechanism including the connecting portion 46 and the connecting member 56 is employed as the connecting mechanism 57 between the basic element 31 and the additional element 32. Instead of this, a bayonet mechanism including a circumferential groove and a claw that can be fitted into the groove may be employed. Further, instead of the connecting mechanism 57, a screw mechanism may be adopted.

  In the above embodiment, a screw mechanism is employed as the case coupling mechanism 23. Instead of this, a bayonet mechanism including a circumferential groove and a claw that can be fitted into the groove may be employed as the connecting mechanism 23. Moreover, you may employ | adopt the fastening mechanism which fastens the cap 21 and the cup 22 with a volt | bolt as the connection mechanism 23. FIG.

  In the above embodiment, the coupling mechanism 48 that temporarily fixes the filter unit 7 in the cup 22 is employed. Instead of the coupling mechanism 48 shown in the figure, a snap-fit mechanism using elastic deformation of members may be employed for the coupling mechanism 48. Further, the coupling mechanism 48 may be provided by a retainer ring that locks the cover portion 43 to the cup 22.

  Further, instead of the connection mechanism 48, the spring constant of the spring 26 may be set so small that the filter unit 7 can be temporarily fixed in the cup 22. For example, when the filter unit 7 including both the basic element 31 and the additional element 32 is mounted in the cup 22, the spring 26 contracts due to their weight, and the filter unit 7 is accommodated in the cup 22. The spring 26 may have a relatively small spring constant that allows it to be temporarily held. Even in this configuration, the filter unit 7 is prevented from popping out when the cup 22 is separated from the cap 21. Moreover, it is avoided that the operation | work which connects the cup 22 to the cap 21 is prevented by the filter unit 7.

  In the above embodiment, the axial flow type filter element 42 is employed. Instead, a filter element formed by bending a filter medium into a bowl shape and called a chrysanthemum type or a corrugated type may be adopted.

  In the above embodiment, a positive pressure system having the low pressure pump 5 on the upstream side of the fuel filter device 2 is employed. Instead of this, the fuel filter device 2 disclosed herein may be applied to a negative pressure system having a pump only on the downstream side of the fuel filter device 2.

1 Fuel supply device, 2 Fuel filter device, 3 Fuel tank, 4 Internal combustion engine,
5 Low pressure pump, 6 Holding bracket, 7 Filter unit,
11 entrance, 12 exit, 13 entrance passage, 14 exit passage,
21 cap, 22 cup, 23 coupling mechanism,
24 drain hole, 25 drain plug,
26 Spring, 27 Movable member, 28 Outer edge, 29 Valve body part,
31 basic elements, 32 additional elements,
41 frame, 42 filter element, 43 cover part,
44 connecting part, 45 center pipe, 46 connecting part,
47 opening, 48 coupling mechanism,
51 fiber layer, 52 upper body, 53 lower body,
54 opening, 56 connection member, 57 connection mechanism, 58 guide part.

Claims (10)

In a fuel filter device capable of accommodating a basic element (31) including a filter element for filtering fuel flowing in a fuel passage and an additional element (32) disposed in the fuel passage and providing an additional function,
A fuel filter device comprising a valve body portion (29) that at least partially closes the fuel passage in the absence of the additional element (32).   The valve body portion (29) is disposed so as to be in contact with the additional element, and moves to a first position where the fuel passage is opened by contact with the additional element (32). 2. The fuel filter device according to claim 1, wherein the fuel filter device is configured to move to a second position where the fuel passage is at least partially closed when there is no contact with the additional element. 3. And a case (21, 22) capable of accommodating the basic element and the additional element,
The basic element is supported by the case,
3. The fuel filter device according to claim 1, wherein the additional element is detachable from the basic element and is supported by the case via the basic element. 4. Furthermore, an opening partition member (45) that partitions the opening (47) as the fuel passage in the case;
A spring (26) for urging the valve body portion toward the opening,
The valve body portion is configured to move away from the opening against the spring in the presence of the additional element and to move to a position at least partially closing the opening in the absence of the additional element. The fuel filter device according to claim 3, wherein the fuel filter device is a fuel filter device. The opening partition member is a center pipe (45) that is a part of the basic element, has a connecting portion (46) to which the additional element is connected, and is disposed in the case.
The fuel filter device according to claim 4, wherein the additional element can be disposed between the center pipe and the valve body portion. Furthermore, it comprises a cap (21) and a cup (22) which are detachable from each other, constituting the case,
The valve body portion and the spring are provided in the cup,
The fuel filter device according to claim 5, further comprising a connection mechanism (48) for temporarily fixing the basic element and the additional element to the cup against the spring. A cap (21) and a cup (22), which are detachable from each other, constituting a case (21, 22) capable of accommodating the basic element and the additional element;
A center pipe (45) defining the fuel passage extending from the cap into the cup and defining an opening (47) in the cup;
A spring (26) that movably supports the valve body portion in the cup and biases the valve body portion in a direction to close the opening;
The additional element can be disposed between the opening and the valve body part by being detachable with respect to the tip of the center pipe.
The valve body portion moves to a first position where the additional element opens the opening in the presence of the additional element, and to a second position that at least partially closes the opening in the absence of the additional element. The fuel filter device according to claim 1, wherein the fuel filter device moves. The basic element supports the filter element (42) and a frame (41) that partitions the dirty side region (DS) and the clean side region (CS) by contacting the case,
A coupling mechanism (48) for temporarily fixing the basic element to the cup so as to accommodate the basic element in the cup against the spring;
The center pipe is part of the frame;
The basic element and the additional element are connectable,
The basic element is housed in the cup by compressing the spring while positioning the valve body portion in the second position by bringing the center pipe into contact with the valve body portion. Is possible,
The filter unit (7), in which the basic element and the additional element are connected, compresses the spring while positioning the valve body portion in the first position by the additional element, thereby 8. The fuel filter device according to claim 7, wherein the whole can be accommodated in the cup.   The fuel filter device according to any one of claims 1 to 8, wherein the additional element is a moisture collector for collecting moisture in the fuel.   The said valve body part contains the cone-shaped protrusion provided in a part of plate-shaped member (27) arrange | positioned so that a contact with the said additional element is possible. The fuel filter device according to any one of the above.

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