JP2008151090A - Diesel filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side flow type diesel filter capable of reducing the number of components and assembly manhours, and of improving replacement workability of a filtering member. <P>SOLUTION: This side flow type diesel filter includes a case, a cap closing an open part on the upper side of the case and having a fuel outlet, a filter medium, a filter medium holding member holding the upper part of the filter medium, and a clogging sensor, and is structured such that a fuel flowing from a fuel inlet is introduced into the case through a fuel passage between the case and the filter medium, and the fuel filtered by the filter medium is discharged from the fuel outlet. In the side flow type diesel filter, a communication passage communicating with the fuel outlet is formed in the cap, the clogging sensor is arranged in the communication passage, and pressure on the downstream side of the filter medium is transmitted to the clogging sensor through the fuel outlet and the communication passage. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a diesel filter provided in a fuel supply system of an automobile or the like, and more particularly to a side flow type diesel filter with a clogging sensor that reduces the number of parts.

  Diesel engines have long been used as engines for automobiles and the like. In a diesel engine, light oil fuel in a fuel tank is filtered by a diesel filter, the filtered fuel is compressed to a high pressure by an injection pump, injected from an injector into a combustion chamber of the engine, and self-combusted in the combustion chamber.

  By the way, foreign matters such as moisture, dust and solid impurities such as rust are mixed in the fuel. In particular, the water in the fuel is divided into dissolved water and free water. Dissolved water is consumed with fuel without stagnation in the fuel path, so there is no particular problem, but free water enters as rainwater during refueling, moisture in the air enters water droplets, This occurs due to precipitation of dissolved water due to a decrease in temperature, etc., and since the specific gravity is larger than that of light oil, it stagnates in the injection pump and rusts and causes sticking. Diesel filters are used to eliminate such harmful effects.

  The side flow type diesel filter, that is, the fuel introduced from above flows down between the case and the filter medium, then moves up in the filter medium and is discharged from the discharge passage provided above. There is a diesel filter. FIG. 7 shows a side flow type diesel filter filed by the present applicant (however, there is no clogging sensor). The diesel filter 1 includes a cup-shaped case 2 that forms an outer shell, and a cap 3 that is detachably attached to an upper opening end of the case 2. A fuel supply pipe 4 and a fuel discharge pipe 5 are attached to the cap 3.

  In the case 2, a filter member 8 including a filter medium 6 and a filter medium holding member 7 that holds the upper end of the filter medium 6 is accommodated. In addition, a communication hole 9 communicating with the fuel discharge pipe 5 is provided on the upper surface of the filter medium holding member 7. Further, when the filter member 8 is housed in the case 2, An annular seal member 10 is attached in a form that is sandwiched between the bottom surface and the top surface of the filter medium holding member 7. A water reservoir chamber 11 is formed below the filter member 8.

  The fuel containing foreign matter introduced from the fuel supply pipe 4 as indicated by the black arrow is supplied to the upper surface of the filter medium holding member 7, spreads over the upper surface, and the outer peripheral surface of the case 2 and the filter member 8. As shown in the white arrow through the communication hole 9, it is introduced into the water reservoir chamber 11 below the case 2, changed in direction by 180 degrees in the water reservoir chamber 11, and filtered upward through the filter medium 6. It is sent to an engine (not shown) through a fuel discharge pipe 5. And water is isolate | separated when changing direction in the water reservoir chamber 11, and since the separated water has a specific gravity larger than a fuel, it accumulates in the water reservoir chamber 11 (refer patent document 1).

  By the way, the filter medium 6 of the diesel filter is clogged when it is used for a long time, and therefore needs to be replaced. A clogging sensor is provided to inform the driver of the replacement time. This clogging sensor is known as a negative pressure operation type in which a switch is interlocked with a diaphragm. The clogging sensor is provided on the downstream side of the filter medium 6, and when the filter medium 6 is clogged, a negative generated on the downstream side of the filter medium 6. Under pressure, the diaphragm is actuated and the switch is turned on to notify the driver of clogging of the filter medium 6 (see Patent Document 2).

  When a conventional clogging sensor is provided in a conventional side flow type diesel filter, the result is as shown in FIG. That is, the second communication hole 14 is provided on the upper surface of the filter medium holding member 7, the clogging sensor 13 is provided in the cap 3 above the second communication hole 14, and the second communication hole 14 is surrounded similarly to the seal member 10. In addition, the annular second seal member 15 is attached so as to be sandwiched between the bottom surface of the cap 3 and the top surface of the filter medium holding member 7.

  However, when the second communication hole 14 is provided on the upper surface of the filter medium holding member 7 or the second seal member 15 is attached, the number of parts increases and the number of assembling steps increases. Become.

  In order to make the attachment of the diesel filter as simple as possible, it is conceivable that the fuel discharge pipe 5 is provided in the center of the cap 3 and the case 2 and the cap 3 are attached without considering the attachment position. When the clogging sensor 13 is provided as described above, some positioning means is required when attaching the case 2 and the cap 3 in order to align the positions of the clogging sensor 13 and the second communication hole 14.

For example, an example of the first stage positioning means of the case 2 and the filter member 8 will be described with reference to FIG. 8 (cross-sectional view taken along the line C-C in FIG. 7). First, the filter medium holding member 7 having a plurality of collar portions 16. A positioning projection 17 is provided on the outer periphery, a bulging portion 18 that can be inserted into the positioning projection 17 is provided on the inner surface of the case 2, and both are attached by inserting the bulging portion 18 into the positioning projection 17. Both are attached by positioning means for aligning the mark provided on the cap 3 with the mark provided on the case 2. As a result, the production man-hours increase accordingly, and the production cost increases accordingly.
Japanese Patent Application No. 2005-308073 JP2004-3426

  An object of the present invention is to provide a side flow type diesel filter that can reduce the number of parts and the number of assembling steps, and can improve the exchange workability of a filter member.

  In order to achieve the above object, the present invention employs the following configuration.

  In the invention according to claim 1, a case, a cap that closes the open part above the case and has a fuel discharge port, a filter medium, a filter medium holding member that holds the filter medium above, and a clogging sensor The fuel is introduced into the case through a fuel passage between the case and the filter medium, and the fuel filtered by the filter medium is discharged from the fuel discharge port. In the flow type diesel filter, a communication passage communicating with the fuel discharge port is provided in the cap, the clogging sensor is provided in the communication passage, and the pressure downstream of the filter medium is set to the fuel discharge port and the communication passage. And transmitting to the clogging sensor via With such a configuration, there is no need to attach an annular seal member between the bottom surface of the cap and the upper surface of the filter medium holding member, surrounding the communication hole to the clogging sensor on the upper surface of the filter medium holding member, and the communication hole. .

  In the invention according to claim 2, in the invention according to claim 1, the cap is provided with a fuel discharge passage communicating with the fuel discharge port and having at least a horizontal portion, the same direction as the horizontal portion of the fuel discharge passage. A configuration in which the communication path is provided. The communication hole is formed by a drill. Usually, the start end of the communication hole is a cap end as shown in FIG. 1 and is formed from the cap end to the fuel discharge passage. Then, the communication hole having a length from the cap end to the clogging sensor becomes a mere dead space, and the cap end at the start end needs to be sealed with a blind plug. The dead space and blind plug are not necessary because the communication hole is long enough to reach the clogging sensor.

  In the invention according to claim 3, the case, a cap that closes the open portion above the case and has a fuel discharge port, a filter medium, a filter medium holding member that holds the filter medium above, and a clogging sensor The fuel is introduced into the case through a fuel passage between the case and the filter medium, and the fuel filtered by the filter medium is discharged from the fuel discharge port. In the flow type diesel filter, the cap is provided with a fuel discharge passage communicating with the fuel discharge port, the clogging sensor is provided in the fuel discharge passage, and the pressure downstream of the filter medium is controlled by the fuel discharge port and the fuel. A configuration for transmitting to the clogging sensor via a discharge passage. With such a configuration, a communication hole is not required, and a clogging sensor can be installed not only in the upward direction but also in the lateral direction.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the fuel discharge port is provided at the center of the cap. With such a configuration, even if the clogging sensor is attached to the cap, no positioning means is required when attaching the case and the cap.

  In the invention according to claim 1, a communication passage communicating with the fuel discharge port is provided in the cap, a clogging sensor is provided in the communication passage, and the pressure downstream of the filter medium is clogged via the fuel discharge port and the communication passage. By transmitting to the sensor, there is no need for a communication hole and a seal member communicating with the sensor on the upper surface of the filter medium holding member, so the number of parts and assembly man-hours can be reduced, and the production cost can be reduced accordingly. it can. In addition, the replacement of the filtration member can be simplified and the reliability after the replacement can be increased.

  In the invention according to claim 2, a communication hole is formed in the cap by providing a fuel discharge passage having at least a horizontal portion communicating with the fuel discharge port, and providing the communication passage in the same direction as the horizontal portion of the fuel discharge passage. Since extra dead space and blind plugs can be eliminated, the number of parts and production cost can be reduced accordingly.

  In the invention according to claim 3, the cap is provided with a fuel discharge passage communicating with the fuel discharge port, a clogging sensor is provided in the fuel discharge passage, and the pressure downstream of the filter medium is passed through the fuel discharge port and the fuel discharge passage. By transmitting to the clogging sensor, the communication hole can be made unnecessary, so that the production cost can be reduced accordingly. Further, since the clogging sensor can be provided not only in the upward direction but also in the lateral direction, the degree of freedom in installation can be increased.

  In the invention according to claim 4, by providing the fuel discharge port at the center of the cap, in addition to the effect of the invention according to any one of claims 1 to 3, even if the clogging sensor is attached to the cap, Since the positioning means is not required when attaching the cap, the attachment between the case and the cap can be facilitated, and the productivity can be increased accordingly.

  1 shows a cross-sectional view of a side flow diesel filter, FIG. 2 shows a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 shows a cross-sectional view before assembly. The side flow type diesel filter of the present invention may be used in any fuel system for automobiles, construction equipment, forklifts, generators, etc., but in the following, it is used for fuel systems for automobiles. explain.

  The side flow type diesel filter 20 includes a cup-shaped case 30 that forms an outer shell, a filter member 35 that is housed in the case 30, a cap 60 that closes an upper open portion of the case 30, and a case 30 and a cap. The fastening member 48 and the like are integrated with each other.

  The case 30 is a metal hollow cylindrical member having an upper opening, and as shown in FIG. 3, a horizontal ring-shaped upper step portion 31 having a diameter D1 protruding outward is formed at the upper end portion thereof. A horizontal ring-shaped middle step 32 having a diameter D2 is formed below the upper step 31, and a horizontal ring-shaped lower step 33 having a diameter D3 is formed below the middle step 32. Below the portion 33, a space serving as a post-reservoir chamber 50 having a diameter D4 is formed.

  By making the case 30 made of metal, the impact resistance of the case is enhanced, and the installation location can be provided, for example, at the bottom of an automobile, where it can be hit by a stone that is flipped up by a tire. In addition, when a safe place with respect to impact resistance is ensured, it may be made of resin instead of metal.

  A drain cock (not shown) is provided at the bottom of the case 30, and when the water in the water storage chamber 50 reaches a predetermined value or more, the water is opened and discharged. The discharge is performed manually or automatically by providing a water amount detection means such as a float switch in the water reservoir, for example, and receiving a signal from the detection means.

  The filter member 35 includes a filter medium 36 and a filter medium holding member 37. The filter medium 36 is a cylindrical member that is formed by winding a flat filter medium and a wave-shaped filter medium, and is arranged so that the fuel passages are in the vertical direction. The fuel flows through a number of passages formed inside. In this way, foreign substances contained in the fuel are captured. The outer diameter is smaller than the inner diameter D4 of the water reservoir 50 of the case 30, and when stored in the case 30, a fuel passage 38 is formed between the two members.

  The filter medium holding member 37 is a resin member integrally formed as one member, and includes a main body portion 39, a collar portion 40, and a connecting portion 41. The main body 39 is an umbrella-like member having a lower opening that is an inverted container having a shallow bottom. The inner diameter of the main body 39 is substantially the same as the outer diameter of the filter medium 36. The filter medium 36 is fitted, and both members are liquid-tightly integrated with an adhesive to form the filter member 35.

  A tubular fuel outflow opening 43 is provided at the center of the main body 39. The fuel outflow opening 43 is provided to face the fuel discharge port of the cap 60. When the opening of the case 30 is closed with the cap 60, a ring-shaped first portion is formed on the outer periphery of the fuel outflow opening 43. The sealing material 44 is disposed, and the first sealing material 44 is sandwiched between the bottom surface of the cap 60 and the top surface of the filter material holding member 37, thereby preventing inflow fuel that has not been filtered from leaking to the outflow side.

  The collar portion 40 is a ring-shaped portion whose outer diameter is smaller than the inner diameter D2 of the middle step portion 32 of the case 30, its inner diameter is substantially the same as the inner diameter D3 of the lower step portion 33 of the case 30, and its bottom portion is the middle step portion 32. It is mounted on the upper surface. Further, when the open portion of the case 30 is closed with the cap 60, the ring-shaped second sealing material 45 having an outer diameter slightly smaller than the inner diameter D2 of the middle step portion 32 is placed on the middle step portion 32 of the case 30. Next, the collar portion 40 is placed on the middle step portion 32 inside the second seal material 45, and the second seal material 45 is liquid-tightly sandwiched between the bottom surface of the cap 60 and the upper surface of the middle step portion 32. The order of placing the second seal material 45 and the collar portion 40 may be reversed.

  The connecting portion 41 is a member that connects the upper outer peripheral surface of the main body portion 39 and the inner peripheral surface of the collar portion 40, and is provided at six locations radially and at equal intervals. Six arc-shaped notches 46 are provided at equal intervals, and the fuel flows from the upper side to the lower fuel passage 38 via the notch portions 46.

  In addition, six ribs 47 that are substantially the same shape as the connecting portion 41 are provided radially below the connecting portion 41. The two outer diameters of the ribs 47 facing each other are slightly smaller than the inner diameter D3 of the lower step portion 33 of the case 30. When the filter member 35 is stored in the case 30, the ribs 47 are portions of the lower step portion 33 of the case 30. The filter member 35 is guided along the inner peripheral surface of the filter, and after storage, the shaft center of the filter medium 36 and the case 30 and the shaft center of the fuel discharge port 63 and the fuel outlet opening 43 are aligned. .

  The fastening member 48 is an L-shaped member made of metal or resin, and an internal thread 49 is formed on the inner surface thereof. When the open portion of the case 30 is closed with the cap 60, the outer bottom surface of the cap 60 is placed on the upper surface of the upper stage portion 31 of the case 30. The fastening member 48 is inserted from below the case 30, and the female screw 49 is screwed onto the male screw 66 formed on the outer peripheral surface of the cap 60 until the bottom horizontal surface of the fastening member 48 contacts the bottom surface of the upper step portion 31. By doing so, the case 30 and the cap 60 are fixed together.

  After the filter member 35 is stored in the case 30, the filter medium 36 penetrates to a depth of about half or more of the case 30 to form a water reservoir 50 below the filter medium 36, and the upper surface of the filter medium holding member 37 and the cap 60. An upper chamber 51 is formed between the bottom surface of the recess 67. In addition, a fuel passage 38 is formed between the inner surface of the diameter D 4 portion of the case 30 and the outer peripheral surface of the filter medium 36, and the fuel supplied to the upper chamber 51 is between the main body portion 39 and the collar portion 40. The water is introduced into the water reservoir 50 through the notch 46 and the fuel passage 38.

  The cap 60 is a metal circular member, and a fuel inflow port 62 and a fuel discharge port 63 are opened in the vertical direction in the circular main body portion 61. The fuel inlet 62 is eccentrically provided in the main body portion 61, and a fuel supply pipe 64 having a fuel supply passage is formed integrally therewith on the upstream side thereof, and the inside of a fuel tank (not shown) is formed via the fuel supply pipe 64. The fuel is supplied. Further, the fuel discharge port 63 is provided at the center of the main body portion 61, and a fuel discharge pipe 65 having a fuel discharge passage therein is integrally formed on the downstream side thereof, and is filtered through the fuel discharge pipe 65. The fuel is sent to a fuel injection pump (not shown). The fuel supply pipe 64 and the fuel discharge pipe 65 may be separate from the cap 60.

  The main body portion 61 is substantially the same diameter as the diameter D1 of the upper step portion 31 of the case 30, and a male screw 66 to which the fastening member 48 can be screwed is formed on the lower outer peripheral surface thereof, and the case is formed on the bottom thereof. A concave portion 67 having the same diameter as the diameter D3 of the lower step portion 33 is formed. The recess 67 becomes a space for forming the upper chamber 51 on the upper surface of the filter member 35 after the filter member 35 is inserted into the case 30.

  Further, approximately half of the main body portion 61 is a thick portion 68. The thick portion 68 is provided with a vertical sensor fitting hole 69 and a horizontal communication path 70. The sensor fitting hole 69 is for attaching the clogging sensor 75, and the bottom thereof is provided vertically to reach the bottom surface of the communication path 70, and the pressure is transmitted to the clogging sensor 75 through the communication path 70. To do.

  The communication path 70 is a horizontal hole formed by, for example, a drill from the cap end opposite to the fuel discharge pipe 65 to the fuel discharge path in the fuel discharge pipe 65, and the cap end is sealed with a blind plug 71 after the formation. The As a result, a communication passage 70 as shown in FIG. 1 is formed, but in reality, a space between the sensor fitting hole 69 and the blind plug 71 is a dead hole 72 which is a dead space.

  The clogging sensor 75 is already known, and FIG. 1 schematically shows an example of a negative pressure sensing type. That is, the clogging sensor 75 has a diaphragm 76, a connecting member 77 attached to the diaphragm 76, a movable contact 78, and a fixed contact 79 disposed so as to be able to contact the movable contact 78, and the filter medium 36 is clogged. When a negative pressure is generated on the downstream side of the filter medium 36, the negative pressure acts on the lower surface of the diaphragm 76 via the communication passage 70, and the diaphragm 76 moves downward as indicated by an arrow. Then, the movable contact 78 comes into contact with the fixed contact 79, and the contacted signal is transmitted to the driver's seat via the wiring connector 80, and the driver is notified of clogging of the filter medium 36 by turning on the indicator on the driver's seat. . The clogging sensor 75 is press-fitted into the sensor fitting hole 69 with the O-ring 81 attached to the outer periphery thereof, but the attachment may be screwing or the like.

  The fuel supply pipe 64, the fuel discharge pipe 65, and the clogging sensor 75 on the cap 60 are attached at the positions shown in FIG. Further, although the cap 60 has been described as being made of metal, it may be made of resin.

  The fuel flow will be described. The fuel introduced from the fuel supply pipe 64 as indicated by the black arrow reaches the upper chamber 51 from the fuel inlet 62 and is dispersed in the direction of 360 degrees in the upper chamber 51, and is notched as indicated by the black arrow. The fuel passage 38 between the inner surface of the case 30 and the outer peripheral surface of the filter medium 36 flows down from the portion 46 and is introduced into the water reservoir 50.

  The water contained in the water reservoir 50 is separated, and the fuel from which the water has been separated moves up as indicated by the white arrow, passes through the filter medium 36, and the contained foreign matter is removed. The fuel from which the foreign matter has been removed reaches the upper space 42 above the filter medium 36, and is discharged through the fuel outflow opening 43, the fuel discharge port 63, and the fuel discharge pipe 65 as indicated by the white arrow.

  When the filter medium 36 is clogged, a negative pressure is generated on the downstream side of the filter medium 36, and the negative pressure is transmitted to the lower surface of the diaphragm 76 of the clog sensor 75 via the communication path 70. Then, the diaphragm 76 moves downward as indicated by an arrow, and the movable contact 78 comes into contact with the fixed contact 79. When the movable contact 78 comes into contact with the fixed contact 79, the indicator on the driver's seat is turned on to notify the driver that the filter medium 36 is clogged.

  In this way, the negative pressure on the downstream side of the filter medium 36 is transmitted to the clogging sensor 75 through the fuel discharge port 63 and the communication passage 70, so that the second communication hole 14 and the second communication hole 14 shown in FIG. The two seal member 15 becomes unnecessary.

   In the case of this embodiment, the case 30, the cap 40, and the filtering member 60 are all described as circular. However, the shape of each member may be a regular polygon or an ellipse. By attaching the clogging sensor 75 shown in the above embodiment to the case 30 and the cap 60 having a structure in which the case 30 and the cap 60 are formed in a circle, a regular polygon or an ellipse and the fuel discharge port is provided at the center of the cap, The case 30 and the cap 60 can be attached without considering the street attachment position.

  FIG. 4 is a sectional view showing a second embodiment of the side flow type diesel filter of the present invention. The difference from the first embodiment is that the blind plug 71 and the discard hole 72 are unnecessary, and FIG. 5 shows a cross-sectional view taken along the line BB of FIG. The parts common to the first embodiment are denoted by the same reference numerals, and the description other than the cap is omitted.

  The cap 60 is a metal circular member, and a fuel inflow port 62 and a fuel discharge port 63 are opened in the vertical direction in the circular main body portion 61. The fuel inlet 62 is eccentrically provided in the main body portion 61, and a fuel supply pipe 64 having a fuel supply passage is formed integrally therewith on the upstream side thereof, and the inside of a fuel tank (not shown) is formed via the fuel supply pipe 64. The fuel is supplied. Further, the fuel discharge port 63 is provided at the center of the main body portion 61, and a fuel discharge pipe 65 having a fuel discharge passage therein is integrally formed on the downstream side thereof, and is filtered through the fuel discharge pipe 65. The fuel is sent to a fuel injection pump (not shown). The fuel supply pipe 64 and the fuel discharge pipe 65 may be separate from the cap 60.

  Further, approximately half of the main body portion 61 is a thick portion 68. The thick portion 68 is provided with a vertical sensor fitting hole 69 and a horizontal communication path 70. The sensor fitting hole 69 is for attaching the clogging sensor 75, and the bottom thereof is provided vertically to reach the bottom surface of the communication path 70, and the pressure is transmitted to the clogging sensor 75 through the communication path 70. To do.

  The communication passage 70 is provided so as to be collinear with the horizontal portion 65 a of the fuel discharge pipe 65. That is, the horizontal portion 65 a of the fuel discharge pipe 65 is provided on the side opposite to the thick portion 68, and a drill for forming the communication path 70 is connected to the fuel discharge port 63 from the tip of the horizontal portion 65 a of the fuel discharge pipe 65. To the sensor fitting hole 69 in the same direction as the axis of the horizontal portion 65a from the fuel discharge port 63 side. Therefore, the blind plug 71 and the discard hole 72 can be made unnecessary. In this case, the fuel supply pipe 64 can be provided in a direction orthogonal to the horizontal portion 65a of the fuel discharge pipe 65, for example, as shown in FIG.

  The operation of the clogging sensor 75 of this embodiment is almost the same as that of the first embodiment. That is, when the filter medium 36 is clogged, a negative pressure is generated on the downstream side of the filter medium 36, but the negative pressure is transmitted to the lower surface of the diaphragm of the clog sensor 75 via the communication path 70. Then, the diaphragm moves downward, and the movable contact comes into contact with the fixed contact. When the movable contact comes into contact with the fixed contact, the indicator on the driver's seat is turned on to notify the driver that the filter medium 36 is clogged.

  FIG. 6 is a sectional view showing a third embodiment of the side flow type diesel filter of the present invention. The difference between the first embodiment and the second embodiment is that the blind plug 71 and the discard hole 72 are not required and the clogging sensor 75 is easily attached. The parts common to the first embodiment are denoted by the same reference numerals, and the description other than the cap is omitted.

  The cap 60 is a metal circular member, and a fuel inflow port 62 and a fuel discharge port 63 are opened in the vertical direction in the circular main body portion 61. The fuel inlet 62 is eccentrically provided in the main body portion 61, and a fuel supply pipe 64 having a fuel supply passage is formed integrally therewith on the upstream side thereof, and the inside of a fuel tank (not shown) is formed via the fuel supply pipe 64. The fuel is supplied. Further, the fuel discharge port 63 is provided at the center of the main body portion 61, and a fuel discharge pipe 65 having a fuel discharge passage therein is integrally formed on the downstream side thereof, and is filtered through the fuel discharge pipe 65. The fuel is sent to a fuel injection pump (not shown). The fuel supply pipe 64 and the fuel discharge pipe 65 may be separate from the cap 60.

  A horizontal portion 65a is formed in the fuel discharge pipe 65, and a clogging sensor 75 is provided in the horizontal portion 65a. That is, the horizontal portion 65a of the fuel discharge pipe 65 is formed with a cylindrical mounting body 65b for mounting the clogging sensor 75, and the clogging sensor 75 is a cylinder with an O-ring 81 attached to the outer periphery thereof. It is press-fitted and fixed to the shape mounting body 65b. Since the clogging sensor 75 can be attached to the fuel discharge pipe 65 above or laterally of the fuel discharge pipe 65, the degree of freedom of the attachment position is increased.

  The operation of the clogging sensor 75 of this embodiment is almost the same as that of the first embodiment. That is, when the filter medium 36 is clogged, a negative pressure is generated on the downstream side of the filter medium 36, but the negative pressure is transmitted to the lower surface of the diaphragm of the clog sensor 75 via the fuel discharge pipe 65. Then, the diaphragm moves downward, and the movable contact comes into contact with the fixed contact. When the movable contact comes into contact with the fixed contact, the indicator on the driver's seat is turned on to notify the driver that the filter medium 36 is clogged.

  The present invention is not limited to the configuration of the above embodiment, and can be appropriately changed in design without departing from the gist of the invention. For example, the fuel outlet 43 and the fuel outlet 63 are arranged in the center. However, the fuel inlet 62 may be provided in the center, and the fuel outlet opening 43 and the fuel outlet 63 may be provided eccentrically. Further, the fuel inflow port has been described as being provided in the cap, but it may be provided in the side wall of the case and may flow into the water reservoir chamber 50 through the fuel passage 38 from the location.

Sectional view of side flow type diesel filter of the present invention Sectional view of the AA line of FIG. Sectional drawing of each part which decomposed | disassembled the side flow type diesel filter of this invention Sectional view of another side flow type diesel filter of the present invention Sectional view of the BB line of FIG. Sectional drawing of the other side flow type diesel filter of this invention Sectional view of another conventional side-flow diesel filter Sectional view of CC line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 ... Diesel filter 30 ... Case 31 ... Upper step part 32 ... Middle step part 33 ... Lower step part 35 ... Filtration member 36 ... Filter medium 37 ... Filter medium holding member 38 ... Fuel passage 39 ... Main-body part 40 ... Collar part 41 ... Connection part 42 ... Upper part Space 43 ... Opening portion for fuel outflow 44 ... First seal material 45 ... Second seal material 46 ... Notch portion 47 ... Rib 48 ... Tightening member 49 ... Female thread 50 ... Water reservoir chamber 51 ... Upper chamber 60 ... Cap 61 ... Main body Portion 62 ... Fuel inlet 63 ... Fuel discharge port 64 ... Fuel supply pipe 65 ... Fuel discharge tube 65a ... Horizontal portion 65b ... Cylindrical mounting body 66 ... Male screw 67 ... Recess 68 ... Thick part 69 ... Sensor fitting hole 70 ... Communication passage 71 ... Blind plug 72 ... Discard hole 75 ... Clogging sensor 76 ... Diaphragm 77 ... Connecting member 78 ... Moving contact 79 ... Fixed contact 80 ... Connector for wiring 81 ... O-ring

Claims (4)

  A case, a cap that closes the open portion above the case, and has a fuel discharge port; a filter medium; a filter medium holding member that holds the filter medium above; and a clogging sensor; A side flow type diesel filter that introduces inflowing fuel into the case through a fuel passage between the case and the filter medium, and discharges the fuel filtered by the filter medium from the fuel discharge port, A communication passage communicating with the fuel discharge port is provided in the cap, the clogging sensor is provided in the communication passage, and the pressure downstream of the filter medium is transmitted to the clogging sensor via the fuel discharge port and the communication passage. A side flow type diesel filter characterized by   2. The side according to claim 1, wherein the cap is provided with a fuel discharge passage having at least a horizontal portion communicating with the fuel discharge port, and the communication passage is provided in the same direction as the horizontal portion of the fuel discharge passage. Flow type diesel filter.   A case, a cap that closes the open portion above the case, and has a fuel discharge port; a filter medium; a filter medium holding member that holds the filter medium above; and a clogging sensor; A side flow type diesel filter that introduces inflowing fuel into the case through a fuel passage between the case and the filter medium, and discharges the fuel filtered by the filter medium from the fuel discharge port, The cap is provided with a fuel discharge passage communicating with the fuel discharge port, the clogging sensor is provided in the fuel discharge passage, and the pressure downstream of the filter medium is controlled through the fuel discharge port and the fuel discharge passage. A side flow type diesel filter characterized by being transmitted to a sensor.   The side flow type diesel filter according to any one of claims 1 to 3, wherein the fuel discharge port is provided at a center of the cap.

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