• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    INTAKE SYSTEM FOR INTERNAL COMBUSTION ENGINE An intake system includes an intake passage (P) for leading intake air to an internal combustion engine (50); an air cleaner (71) connected to the upstream side end portion of the intake passage (P); and a pressure sensor (90) for measuring pressure of intake air in the intake passage (P). The air cleaner case (72) of the air cleaner (71) includes a case main body (73) mounted to the upstream side end portion of the intake passage (P), and a cover portion (75) for closing the case main body (73). The intake system includes a throttle body (80) constituting part of the intake passage (P) and having a throttle valve (82). The pressure sensor (90) is mounted to a support portion (95) extending outward from the case main body (73) and is connected via a pipe line (100) to the downstream side of the throttle valve (82) of the throttle body (80). rc C m LO r-~ tit C11 r itL r0 Fr Rr 94A 94 90 91 p 92
    公开号:AU2013205953A1
    申请号:U2013205953
    申请日:2013-05-21
    公开日:2014-02-27
    发明作者:Shinya Koyama
    申请人:Honda Motor Co Ltd；
    IPC主号:F02M35-10
    专利说明:
    1 INTAKE SYSTEM FOR INTERNAL COMBUSTION ENGINE Technical Field [0001] The present invention relates to intake systems for an internal combustion engine and in particular to an intake system for an internal combustion engine that has a pressure sensor for measuring the pressure of intake air supplied to an internal combustion engine. Background Art [0002] Vehicles such as automobiles, motorcycles and the like have heretofore been such that an intake system for an internal combustion engine is generally provided with a pressure sensor in order to statically or dynamically measure in an intake path the pressure of intake air supplied to the internal combustion engine. Means for supporting the pressure sensor of this type is known in which the pressure sensor is installed on the upper portion of a serge tank disposed on the upstream side of an intake path in order to eliminate piping and to prevent clogging resulting from foreign matter or from freezing (see e.g. Patent Document 1). [0003] If the serge tank is disposed on the upstream side of a throttle body in the intake path, the serge tank is sometimes designed to incorporate a purifying filter and function as an air cleaner. In this case, the air cleaner case (the serge tank) is configured to have a vertically divided structure to clean the purifying filter at regular intervals. [0004] [Patent Document 1] Japanese Patent Laid-Open No. Hei 10-299535 [0005] However, if the air cleaner case is configured to have the vertically divided structure, the pressure sensor may be disposed on the upper portion of the air cleaner case as in Patent Document 1 mentioned above. In such a case, it is necessary to remove the pressure sensor or to disconnect a cable extending from the pressure sensor when the air cleaner case is disassembled and cleaned. Thus, work for disassembling the air cleaner case is likely to be cumbersome. Object of the Invention [0006] It is the object of the present invention to substantially overcome or at least ameliorate one or more of the foregoing disadvantages.
    2 Summary of the Invention [0007] The present invention provides an intake system for an internal combustion engine including: an intake passage connected to an intake port of the internal combustion engine and leading intake air to the intake port; an air cleaner connected to an upstream side end portion of the intake passage; and a pressure sensor for measuring pressure of intake air in the intake passage, wherein the air cleaner includes an air cleaner case and a purifying filer housed in the air cleaner case, and the air cleaner case includes a case main body mounted to an upstream side end portion of the intake passage, and a cover portion closing the case main body, characterized in that the intake system includes a throttle body constituting part of the intake passage and having a throttle valve, and the pressure sensor is mounted to a support portion extending outward from the case main body and is connected via a pipe line to a downstream side of the throttle valve of the throttle body. [0008] Preferably, the support portion has a hollow joint portion which is formed integrally therewith and to which the pipe line is connected, and a detecting portion of the pressure sensor is connected to an end of the joint portion opposite to the pipe line. [0009] Preferably, a projecting portion extending parallel to the joint portion is formed on an outside portion of the joint portion of the support portion. [0010] Preferably, the projecting portion is set at a length greater than that of the joint portion. [0011] Preferably, the support portion extends from a portion of a side surface of the case main body so as to be flush with and parallel to a mating surface between the case main body and the cover portion. [0012] Preferably, the internal combustion engine has a plurality of cylinders, the throttle body is connected to each of the plurality of cylinders, the pipe line is connected to one of the plurality of throttle bodies, and the support portion is disposed close to the throttle body to which the pipe line is connected. [0013] Preferably, the throttle body has a fuel injection valve for injecting fuel into the intake passage, and the support portion is disposed at a position covering above the fuel injection valve.
    3 [0014] Preferably, the pressure sensor is secured to the support portion by means of a fastening member at a position in the support portion and between the case main body and the detecting portion of the pressure sensor. [0015] According to an embodiment of the invention, the pressure sensor is mounted to the support portion extending outward from the case main body and is connected via the pipe line to the downstream side of the throttle valve of the throttle body. Therefore, the air cleaner case can be disassembled without the removal of the pressure sensor. Thus, the maintenance performance for the air cleaner can be improved. [0016] According to an embodiment of the invention, the support portion has the hollow joint portion which is formed integrally therewith and to which the pipe line is connected, and the detecting portion of the pressure sensor is connected to the end of the joint portion opposite to the pipe line. Therefore, it is not necessary to attach a joint portion as a separate member to the pressure sensor not equipped with a joint portion. Thus, the number of component parts can be reduced. [0017] According to an embodiment of the invention, the projecting portion extending parallel to the joint portion is formed on the outside portion of the joint portion of the support portion. Therefore, the joint portion of the support portion can be protected by the projecting portion. [0018] According to an embodiment of the invention, the projecting portion is set at a length greater than that of the joint portion. Therefore, in the case where the air cleaner is placed with the joint portion faced downward, the projecting portion comes into contact with e.g. its placing surface to prevent the end of the joint portion from coming into contact with the placing surface. Thus, the joint portion can further be protected. [0019] According to an embodiment of the invention, the support portion extends from a portion of a side surface of the case main body so as to be flush with and parallel to the mating surface between the case main body and the cover portion. Therefore, a split mold used to mold the case main body can be simplified. Thus, manufacturing costs can be reduced. [0020] According to an embodiment of the invention, the pipe line is connected to one of the plurality of throttle bodies and the support portion is disposed close to the throttle body to which 4 the pipe line is connected. Therefore, the pipe line can be shortened. Thus, manufacturing costs can be reduced and the arrangement of the pipe line can be facilitated. [0021] According to an embodiment of the invention, the support portion is disposed at a position covering above the fuel injection valve. Therefore, the support portion can protect the fuel injection valve from above. [0022] According to an embodiment of the invention, the pressure sensor is secured to the support portion by means of a fastening member at a position in the support portion and between the case main body and the detecting portion of the pressure sensor. For example, if the fastening member is a bolt, a threaded hole for the bolt can be formed at a rigid portion of the support portion. Therefore, it is possible to suppress the flexure of the support portion during the machining of the threaded hole. Thus, machining accuracy can be improved. Brief Description of the Drawings [0023] A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings in which: Fig. 1 is a left lateral view for assistance in explaining a motorcycle on which an intake system for an internal combustion engine according to one embodiment of the present invention is mounted; Fig. 2 is a left lateral view for assistance in explaining the intake system shown in Fig. 1; Fig. 3 is a cross-sectional view illustrating the periphery of a throttle body shown in Fig. 2, taken along line B-B in Fig. 5; Fig. 4 is a perspective view illustrating the periphery of a pressure sensor shown in Fig. 3; Fig. 5 is a rear view illustrating the periphery of the pressure sensor shown in Fig. 2, as viewed from arrow "A"; and Fig. 6 is a cross-sectional view of the pressure sensor shown in Fig. 3.
    5 Description of Embodiments [0024] An embodiment of an intake system for an internal combustion engine according to the present invention will hereinafter be described in detail with reference to the drawings. Incidentally, the drawings shall be viewed based on the direction of reference symbols. In the following description, front and back or rear, left and right, and upside and downside depend on the direction a rider looks. In the drawings, the front of the vehicle is denoted by symbol Fr, the rear is denoted by symbol Rr, the left is denoted by symbol L, the right is denoted by symbol R, the upside is denoted by symbol U, and the downside is denoted by symbol D. [0025] As shown in Fig. 1, a motorcycle 10 of the present embodiment is configured such that a body frame 11 includes a head pipe 12 installed at a front end thereof; a pair of left and right main frames 13 extending rearward and downward from the head pipe 12; a pair of left and right pivot plates 14 joined to the corresponding rear ends of the pair of left and right main frames 13 and extending downward; and a pair of left and right seat frames 15 joined to the corresponding upper portions of the pair of left and right pivot plates 14 and extending rearward and upward. An engine (an internal combustion engine) 50 is mounted on the main frames 13 and the pivot plates 14. [0026] The motorcycle 10 includes a front fork 21 steerably supported by the head pipe 12; a front wheel WF rotatably supported by a lower end of the front fork 21; a steering handlebar 22 mounted to the upper end of the front fork 21; a swing arm 23 swingably supported by a pivot plate 14; a rear wheel WR rotatably supported by the rear end of the swing arm 23; and a fuel tank 24 disposed above the engine 50. [0027] Incidentally, there are shown in Fig. 1 a front cowl 31, a front side cowl 32, an under cowl 33, a rear cowl 34, a headlight 35, a front fender 36, a rider's seat 37, a pillion passenger's seat 38, a taillight 40, a rear direction indicator 41, a rear fender 42, a main step 43 and a pillion step 44. [0028] The engine 50 is a parallel four-cylinder engine. As shown in Fig. 1, its outer shell mainly includes a crankcase 51, a cylinder block 52 mounted on the front upper end portion of the crankcase 51; a cylinder head 53 mounted on the upper end of the cylinder block 52; and a cylinder head cover 54 covering the upper opening of the cylinder head 53. The engine 50 of the present embodiment is of a front-exhaust and rear-intake type. Therefore, four exhaust ports 6 55 are provided in the front surface of the cylinder head 53. In addition, four intake ports 56 are provided in the rear surface of the cylinder head 53. An exhaust system 60 is connected to the exhaust ports 55 of the engine 50. An intake system 70 is connected to the intake ports 56. [0029] The exhaust system 60 includes an exhaust pipe 61 connected to the exhaust ports 55 of the engine 50 and extending rearward of the vehicle body, and a silencer 62 connected to the downstream end of the exhaust pipe 61. [0030] As shown in Figs. 2 and 3, the intake system 70 is connected to the four intake ports 56 of the engine 50 and constitutes an intake passage P adapted to lead intake air to the intake ports 56. The intake system 70 has an air cleaner 71 connected to the upstream side end portion of the intake passage P, a throttle body 80 constituting part of the intake passage P, and a pressure sensor 90 for measuring the pressure of intake air in the intake passage P. [0031] As shown in Fig. 2, the air cleaner 71 includes an air cleaner case 72 disposed just above the cylinder head cover 54 of the engine 50 and forming a chamber Si, and a purifying filter 76 housed in the air cleaner case. The air cleaner case 72 is formed to have a vertically divided structure, which has a bottomed and roughly bowl-like case main body 73 mounted to the upstream side end portion of the intake passage P and a dome-like cover portion 75 closing the case main body 73. [0032] The case main body 73 has a partition 73A which sections the inside space thereof in an anteroposterior direction to form a front sectioned chamber S2 and a rear sectioned chamber S3 therein. An air duct 73B serving as a first outside air introduction passage is mounted to the front surface of the case body 73. The air duct 73B communicates with the front sectioned chamber S2. Intake air is taken in the intake passage P from the outside via the air duct 73B. [0033] The purifying filter 76 is installed to cover above the front sectioned chamber S2 of the case main body 73. Because of this, intake air taken in from the air duct 73B first passes through the front sectioned chamber S2 of the case body 73, and further the purifying filter 76 and is then led to the inside space of the cover portion 75 and the rear sectioned chamber S3 of the case main body 73. That is to say, the front sectioned chamber S2 of the case main body 73 serves as a dirty chamber and the inside space of the cover portion 75 and the rear sectioned chamber S3 of the case main body 73 serves as a clean chamber.
    7 [0034] Four throttle bodies 80 are installed to correspond to the associated cylinders of the engine 50. As shown in Fig. 2, the throttle body 80 is connected on its downstream side to each of the intake ports 56 and is connected on its upstream side to the air cleaner 71. As shown in Figs. 2 and 3, the throttle body 80 includes a throttle body main body 81 having an inside space constituting part of the intake passage P; a throttle valve 82 disposed inside the throttle body main body 81 and opening and closing the intake passage P; an injector (a fuel injection valve) 83 for injecting fuel into the intake passage P; and an air funnel 84 mounted to the upstream end of the throttle body main body 81. In the present embodiment, the intake passage P is composed of the air funnel 84, the throttle body main body 81, and the intake port 56. [0035] As shown in Figs. 4 and 5, a cylindrical joint portion 85 is installed on the outer circumferential surface of the throttle body main body 81 of the throttle body 80 located on the most left side of the four throttle bodies 80 so as to extend toward the rear of the vehicle. [0036] The joint portion 85 communicates with the intake passage P and is located on the downstream side of the throttle valve 82. A pipe line 100 connected to a joint portion 96 of a support portion 95 to be described later is connected to the joint portion 85. [0037] As shown in Fig. 6, the pressure sensor 90 includes a sensor main body 91 provided with a recessed portion 91A on the rear surface side thereof; and a cylindrical detecting portion 92 joined to the sensor main body 91 so as to cover the recessed portion 91A of the sensor main body 91. A detecting element 93, which is composed of a piezo element and outputs to the outside an electric signal corresponding to pressure, is attached to the recessed portion 91A of the sensor main body 91. [0038] A fastening portion 94 is installed on the side surface of the sensor main body 91 so as to extend toward the outside. The fastening portion 94 is formed with an insertion hole 94A used to pass therethrough a bolt (a fastening member) 101 to be described later. A circumferential groove 92A is formed in the outer circumferential surface of the end portion of the detecting portion 92 so as to extend over the whole circumference thereof. An O-ring 92B is attached to the circumferential groove 92A. [0039] In the present embodiment, the cantilever-like support portion 95 is installed on the case main body 73 of the air cleaner 71 so as to extend rearward from a portion of the rear surface thereof as shown in Figs. 2 to 5. The pressure sensor 90 is mounted to the support portion 95.
    8 As shown in Figs. 4 and 5, the support portion 95 is disposed close to the throttle body 80 located on the most left side. In this way, the pressure sensor 90 of the present embodiment measures the pressure in the intake passage P of the throttle body 80 located on the most left side. [0040] As shown in Figs. 3 and 4, the support portion 95 is installed to extend flush with and parallel to the mating surface between the case main body 73 of the air cleaner case 72 and the cover portion 75. In addition, the support portion 95 is disposed at a position covering above the injector 83 of the throttle body 80. [0041] The downwardly extending cylindrical joint portion 96 connected to the pipe line 100 is integrally formed with the lower surface of the near-end portion of the support portion 95. The detecting portion 92 of the pressure sensor 90 is fitted to and joined to an end of the joint portion 96 opposite to the pipe line 100, i.e., the upper surface portion of the support portion 95 to form a fitting recessed portion 97 communicating with the inside space of the joint portion 96. In this way, the detecting portion 92 of the pressure sensor 90 is connected via the pipe line 100 to the joint portion 85 of the throttle body 80 located on the most left side. [0042] As shown in Figs. 2 to 5, a projecting portion 99 extending parallel to the joint portion 96 is formed at an end portion (an outside portion), extending from the joint portion 96, of the support portion 95. As shown in Fig. 3, the projecting portion 99 is set at a length Li greater than a length L2 of the joint portion 96 of the support portion 95. [0043] As shown in Fig. 3, the support portion 95 is formed with a threaded hole 98 between the case main body 73 of the air cleaner 71 and the detecting portion 92 of the pressure sensor 90. The fastening portion 94 of the pressure sensor 90 connected to the fitting recessed portion 97 is fixedly fastened to the support portion 95 by the bolt 101 passed through the insertion hole 94A of the fastening portion 94 and the threaded hole 98. [0044] As described above, according to the intake system 70 of the present embodiment, the pressure sensor 90 is mounted on the support portion 95 extending outward from the case main body 73 and is connected via the pipe line 100 to the downstream side of the throttle valve 82 of the throttle body 80. Therefore, the air cleaner case 72 can be disassembled without removal of the pressure sensor 90. Thus, the maintenance performance of the air cleaner 71 can be improved.
    9 [0045] According to the intake system 70 of the present embodiment, the support portion 95 has the joint portion 96 formed integrally therewith and connected to the pipe line 100. In addition, the detecting portion 92 of the pressure sensor 90 is connected to the end of the joint portion 96 opposite to the pipe line 100. Therefore, it is not necessary to attach a joint portion as a separate member to the pressure sensor 90 not equipped with a joint portion. Thus, the number of component parts can be reduced. Since the joint portion 96 can easily be formed on the support portion 95 by e.g. resin molding or the like, manufacturing costs for a vehicle can be reduced. [0046] According to the intake system 70 of the present embodiment, the projecting portion 99 extending parallel to the joint portion 96 is formed at a portion of the support portion 95 on the outside of the joint portion 96. Therefore, the joint portion 96 of the support portion 95 can be protected by the projecting portion 99. [0047] According to the intake system 70 of the present embodiment, the projecting portion 99 is set at a length Li greater than the length L2 of the joint portion 96. Therefore, if the air cleaner 71 is placed with the joint portion 96 oriented downward, the projecting portion 99 comes into contact with e.g. its placing surface to prevent the end of the joint portion 96 from coming into contact with the placing surface. Thus, the joint portion 96 can further be protected. [0048] According to the intake system 70 of the present embodiment, the support portion 95 is installed to extend from a portion of a side surface of the case main body 73 so as to be flush with and parallel to the mating surface between the case main body 73 and the cover portion 75. Therefore, a split mold used to mold the case main body 73 can be simplified. Thus, manufacturing costs can be reduced. [0049] According to the intake system 70 of the present embodiment, the pipe line 100 is connected to one of the four throttle bodies 80 and the supporting portion is disposed close to the throttle body 80 to which the pipe line 100 is connected. Therefore, the pipe line 100 can be shortened. Thus, manufacturing costs can be reduced and the arrangement of the pipe line 100 can be facilitated. [0050] According to the intake system 70 of the present embodiment, the support portion 95 is disposed at a position covering above the injector 83. Therefore, the support portion 95 can protect the injector 83 from above.
    10 [0051] According to the intake system 70 of the present embodiment, the pressure sensor 90 is secured to the support portion 95 by means of the bolt 101 at a position in the support portion 95 and between the case main body 73 and the detecting portion 92 of the pressure sensor 90. Therefore, the threaded hole 98 can be formed at a rigid portion of the support portion 95. Therefore, the flexure of the support portion 95 can be suppressed during the machining of the threaded hole. Thus, machining accuracy can be improved. [0052] Incidentally, the present invention is not limited to the exemplification of the present embodiment described above. The present invention can arbitrarily be modified in a range not departing from the gist of the present invention. Description of Reference Symbols [0053] 10 Motorcycle 50 Engine (internal combustion engine) 56 Intake port 70 Intake system 71 Air cleaner 72 Air cleaner case 73 Case main body 75 Cover portion 76 Purifying filter 80 Throttle body 82 Throttle valve 11 83 Injector (fuel injection valve) 90 Pressure sensor 92 Detecting portion 95 Support portion 96 Joint portion 99 Projecting portion 100 Pipe line 101 Bolt (fastening member) P Intake passage Li Length of the projecting portion L2 Length of the joint portion
    权利要求:
    Claims (8)
    [1] 1. An intake system for an internal combustion engine, comprising: an intake passage connected to an intake port of the internal combustion engine and leading intake air to the intake port; an air cleaner connected to an upstream side end portion of the intake passage; and a pressure sensor for measuring pressure of intake air in the intake passage, wherein the air cleaner includes an air cleaner case and a purifying filer housed in the air cleaner case, and the air cleaner case includes a case main body mounted to an upstream side end portion of the intake passage, and a cover portion closing the case main body, wherein the intake system includes a throttle body constituting part of the intake passage, and having a throttle valve, and the pressure sensor is mounted to a support portion extending outward from the case main body and is connected via a pipe line to a downstream side of the throttle valve of the throttle body.
    [2] 2. The intake system for an internal combustion engine according to claim 1, wherein the support portion has a hollow joint portion which is formed integrally therewith and to which the pipe line is connected, and a detecting portion of the pressure sensor is connected to an end of the joint portion opposite to the pipe line.
    [3] 3. The intake system for an internal combustion engine according to claim 2, wherein a projecting portion extending parallel to the joint portion is formed on an outside portion of the joint portion of the support portion.
    [4] 4. The intake system for an internal combustion engine according to claim 3, wherein the projecting portion is set at a length greater than the length of the joint portion.
    [5] 5. The intake system for an internal combustion engine according to any one of claims 2 to 4, wherein the support portion extends from a portion of a side surface of the case main body so as to be flush with and parallel to a mating surface between the case main body and the cover portion. 13
    [6] 6. The intake system for an internal combustion engine according to any one of claims 2 to 5, wherein the internal combustion engine has a plurality of cylinders, the throttle body is connected to each of the plurality of cylinders, the pipe line is connected to one of the plurality of throttle bodies, and the support portion is disposed close to the throttle body to which the pipe line is connected.
    [7] 7. The intake system for an internal combustion engine according to claim 6, wherein the throttle body has a fuel injection valve for injecting fuel into the intake passage, and the support portion is disposed at a position covering above the fuel injection valve.
    [8] 8. The intake system for an internal combustion engine according to any one of claims 2 to 7, wherein the pressure sensor is secured to the support portion by means of a fastening member at a position in the support portion and between the case main body and the detecting portion of the pressure sensor. Honda Motor Co., Ltd. Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON
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    同族专利:
    公开号 | 公开日
    JP2014034965A|2014-02-24|
    US9464604B2|2016-10-11|
    JP6047336B2|2016-12-21|
    AU2013205953B2|2015-10-01|
    BR102013019867B1|2021-09-14|
    BR102013019867A2|2014-12-23|
    US20140041614A1|2014-02-13|
    DE102013209825A1|2014-02-13|
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    CN110374767B|2019-09-06|2020-08-14|杭州富阳新远新能源有限公司|Air filter used in automobile sand wind environment|
    法律状态:
    2016-01-28| FGA| Letters patent sealed or granted (standard patent)|
    2020-12-17| MK14| Patent ceased section 143(a) (annual fees not paid) or expired|
    优先权:
    申请号 | 申请日 | 专利标题
    JP2012178483A|JP6047336B2|2012-08-10|2012-08-10|Intake device for internal combustion engine|
    JP2012-178483||2012-08-10||
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