Intake system

Abstract

To improve the assemblability of a pressure sensor and secure an arrangement space for the pressure sensor.SOLUTION: An intake system has an air cleaner arranged behind an engine for introducing air from the air cleaner through an intake passage to the engine. In the intake system, there are provided a pressure sensor (35) for detecting a pressure in the intake passage, a throttle body (33) forming the upstream side of the intake passage, and an intake pipe (32) forming the downstream side of the intake passage. On the outer peripheral face of the intake pipe, a mounting part is formed on which the pressure sensor is mounted.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an intake system. [Background technology]

[0002] An intake device for a saddle-type vehicle or the like is provided with a pressure sensor that detects the pressure (intake air pressure) in the intake passage from the air cleaner to the engine. One known intake device has a pressure sensor supported on the air cleaner (see, for example, Patent Document 1). In the intake device described in Patent Document 1, the air cleaner is disposed above the engine, and a throttle body is disposed between the air cleaner and the engine. A support portion is extended from the air cleaner, and a pressure sensor is attached to the support portion. The pressure sensor and the throttle body are connected by a hose, and the pressure sensor detects the pressure in the intake passage of the throttle body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6047336 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of a vehicle in which the air cleaner is located behind the engine, other intake system components are arranged in the space surrounding the air cleaner, making it difficult to assemble the pressure sensor to the air cleaner and to ensure a gap between the pressure sensor and the other intake system components.

[0005] The present invention has been made in consideration of the above-mentioned points, and an object of the present invention is to provide an intake system that can improve the ease of installation of a pressure sensor and ensure a space for arranging the pressure sensor. [Means for solving the problem]

[0006] An intake system according to one aspect of the present invention is an intake system in which an air cleaner is disposed behind an engine, and air is introduced from the air cleaner through an intake passage into the engine, the intake system including a pressure sensor for detecting a pressure in the intake passage, a throttle body forming an upstream side of the intake passage, and an intake pipe forming a downstream side of the intake passage. top surface The pressure sensor is attached to the mounting portion. A nipple is provided on the upper surface of the intake pipe, the nipple being connected to the downstream side of the intake passage, the pressure sensor being connected to the nipple via a hose, and the nipple being adjacent to the mounting portion in the vehicle width direction. This solves the above problem. Effect of the Invention

[0007] According to an intake system of one aspect of the present invention, the intake pipe is assembled to the engine with the pressure sensor attached to the intake pipe. Therefore, the pressure sensor can be easily assembled to the engine together with the intake pipe. Also, since the pressure sensor is attached to the intake pipe, a sufficient gap can be secured between the pressure sensor and other intake system components even in the narrow space between the engine and the air cleaner. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a left side view of the saddle-ride type vehicle of the present embodiment. [Diagram 2] FIG. 2 is a perspective view of the engine according to the embodiment. [Diagram 3] FIG. 2 is a top view of the intake device of the present embodiment. [Figure 4] FIG. 2 is a front view of the intake device of the present embodiment. [Diagram 5] FIG. 4 is a top view showing the positional relationship between the engine suspension and the pressure sensor in the embodiment. [Figure 6] FIG. 4 is a side view showing the positional relationship between the engine suspension and the pressure sensor in the embodiment. [Figure 7] 5A to 5C are diagrams illustrating an assembly operation of the pressure sensor of the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An intake device according to one aspect of the present invention has an air cleaner disposed behind an engine, and introduces air from the air cleaner through an intake passage into the engine. The intake device is provided with a pressure sensor that detects pressure in the intake passage. The upstream side of the intake passage is formed by a throttle body, and the downstream side of the intake passage is formed by an intake pipe. A mounting portion for mounting the pressure sensor is formed on the outer circumferential surface of the intake pipe. With the pressure sensor attached to the intake pipe, the intake pipe is assembled to the engine, whereby the pressure sensor can be easily assembled to the engine together with the intake pipe. Furthermore, because the pressure sensor is attached to the intake pipe, sufficient clearance can be secured between the intake pipe and other intake system components even in the narrow space between the engine and the air cleaner. EXAMPLES

[0010] The present embodiment will be described in detail below with reference to the accompanying drawings. Fig. 1 is a left side view of a saddle riding type vehicle of the present embodiment. In the following drawings, the arrow FR indicates the front of the vehicle, the arrow RE indicates the rear of the vehicle, the arrow L indicates the left side of the vehicle, and the arrow R indicates the right side of the vehicle.

[0011] As shown in Fig. 1, the saddle-type vehicle 1 is configured by mounting an engine 31, an electrical system, and various other parts on a diamond-shaped body frame 10 formed of pipes and sheet metal. The body frame 10 has a pair of main frames 12 that branch off to the left and right from a head pipe 11 and extend rearward, and a pair of down frames 13 that branch off to the left and right from the head pipe 11 and extend downward. A rear portion of the engine 31 is supported by the pair of main frames 12, and a front portion of the engine 31 is supported by the pair of down frames 13. Supporting the engine 31 on the body frame 10 ensures the rigidity of the entire vehicle.

[0012] The front portion of the main frame 12 forms a tank rail 14 located above the engine 31, and a fuel tank 21 is supported from below by the tank rail 14. The rear portion of the main frame 12 forms a body frame 15 located behind the engine 31, and a swing arm 22 is supported in a swingable manner in the lower half of the body frame 15. A seat rail 16 consisting of an upper rail 17 and a lower rail 18 is attached to the upper half of the body frame 15. A rider seat 23 and a pillion seat 24 are supported behind the fuel tank 21 on the upper portion of the upper rail 17.

[0013] A pair of front forks 25 are steerably supported on the head pipe 11 via a steering shaft (not shown). A front wheel 26 is rotatably supported on the lower part of the front fork 25, and an upper part of the front wheel 26 is covered by a front fender (not shown). The swing arm 22 extends rearward from the body frame 15. A rear wheel 27 is rotatably supported on the rear end of the swing arm 22, and an upper part of the rear wheel 27 is covered by a rear fender (not shown). An engine 31 is connected to the rear wheel 27 via a chain drive type transmission mechanism, and power from the engine 31 is transmitted to the rear wheel 27 via the transmission mechanism.

[0014] An air cleaner 34 is connected to the rear of the engine 31 via an intake pipe 32 (see FIG. 2) and a throttle body 33. The air cleaner 34 is disposed below the rider's seat 23 and inside the pair of seat rails 16. An intake passage that introduces air from the air cleaner 34 to the engine 31 is formed in the throttle body 33 and the intake pipe 32, and the pressure of the intake passage is detected by a pressure sensor 35 (see FIG. 2). For models in which the air cleaner 34 is disposed behind such an engine 31, there is a demand for an arrangement structure for the pressure sensor 35 that is also effective for models equipped with a two-cylinder engine and having a narrow vehicle width.

[0015] In narrow-vehicle models in which the air cleaner 34 is disposed behind the engine 31, the area around the air cleaner 34 and the engine 31 is crowded with various intake system components. For this reason, it is difficult to secure free space for disposing the pressure sensor 35 so that the pressure sensor 35 does not interfere with the other intake system components. Also, if the gap between the other intake system components and the pressure sensor 35 is narrow, the installation work of the pressure sensor 35 becomes difficult. Therefore, in the intake device of this embodiment, the free space on the upper surface of the intake pipe 32 is utilized so that the intake pipe 32 can be installed to the engine 31 with the pressure sensor 35 attached to the intake pipe 32.

[0016] The intake device will be described with reference to Figures 2 to 6. Figure 2 is a perspective view of the engine of this embodiment. Figure 3 is a top view of the intake device of this embodiment. Figure 4 is a front view of the intake device of this embodiment. Figure 5 is a top view showing the positional relationship between the engine suspension part and the pressure sensor of this embodiment. Figure 6 is a side view showing the positional relationship between the engine suspension part and the pressure sensor of this embodiment.

[0017] As shown in Fig. 2, the engine 31 is a two-cylinder engine and has a crankcase 41 with an upper and lower split structure. A cylinder 42, a cylinder head 43, and a cylinder head cover 44 are attached to the upper part of the crankcase 41. A magneto cover 45 (see Fig. 1) that covers a magneto (not shown) from the side is attached to the left side of the crankcase 41. A clutch cover 46 that covers a clutch (not shown) from the side is attached to the right side of the crankcase 41. A throttle body 33 is connected to the rear surface of the cylinder head 43 via a pair of intake pipes 32.

[0018] An air cleaner 34 (see FIG. 1) is connected to the upstream (rear) side of the throttle body 33. In this manner, the throttle body 33 and the pair of intake pipes 32 are provided between the air cleaner 34 and the cylinder head 43. The upstream sides of a pair of intake passages are formed inside the throttle body 33, and the downstream sides of a pair of intake passages are formed inside the pair of intake pipes 32. A pair of intake passages is formed by the throttle body 33 and the pair of intake pipes 32, and air is introduced from the air cleaner 34 to a pair of intake ports in the cylinder head 43 through the pair of intake passages.

[0019] An arm member 61 is attached to the upper surfaces of the pair of intake pipes 32, and a pressure sensor 35 is supported above the intake pipes 32 by the arm member 61. The inside of a case 71 of the pressure sensor 35 is connected to the intake passage of the intake pipes 32 via a rubber hose 74, and the pressure in the intake passage is detected by the pressure detection surface inside the case 71 of the pressure sensor 35. A cable (not shown) is connected to a connector 73 of the pressure sensor 35, and the detection result of the pressure sensor 35 is output to a control unit via the cable. The detection result of the pressure sensor 35 is used for feedback control of the fuel injection amount.

[0020] As shown in Figures 3 and 4, the pair of intake pipes 32 are formed by inserting a metal flange plate 52 into the front end of a rubber pipe 51. The flange plate 52 is covered with rubber except for its front surface, and an O-ring 53 is attached to an annular groove on the front surface of the flange plate 52 so as to surround the outlet of the intake passage. Mounting holes 54 are formed on both the left and right sides of the flange plate 52, and the front surface of the flange plate 52 is screwed to the rear surface of the cylinder head 43 (see Figure 2) through these mounting holes 54. A flat support base 55 is formed on the upper part of the flange plate 52, and a welded nut 56 (mounting portion) and a nipple 57 are provided on the upper surface of the support base 55.

[0021] A resin arm member 61 is provided on the upper surface of the support base 55 to support the pressure sensor 35 in a cantilever manner. A base end 62 of the arm member 61 is fixed to the welded nut 56 with a bolt 65, and a tip end 63 of the arm member 61 is spaced upward from the intake pipe 32. A protrusion 64 for holding the pressure sensor 35 is formed on the tip end 63 of the arm member 61, and the protrusion 64 is inserted into a through hole in a case 71 of the pressure sensor 35. The protrusion 64 is a snap-fit ​​protrusion, and the protrusion 64 is easily fitted into the through hole of the pressure sensor 35. The pressure sensor 35 is easily attached to the intake pipe 32 via the arm member 61.

[0022] The pressure sensor 35 is formed into a substantially L-shape in top view by the case 71 and the connector 73. A pressure detection surface is built into the front side of the case 71, and the above-mentioned through-hole is formed in the rear side of the case 71. The upper end of a rubber hose 74 is connected to the underside of the front side of the case 71, and the lower end of this hose 74 is connected to a nipple 57 on the support base 55. The intake passage of the intake pipe 32 and the inside of the case 71 are connected through the nipple 57 and the hose 74. The rear side of the pressure sensor 35 is held by the protrusion 64 of the arm member 61, and the front side of the pressure sensor 35 is supported from below by the hose 74.

[0023] Engine vibrations are transmitted from the cylinder head 43 to the intake pipe 32, but the resin arm member 61 and the rubber hose 74 suppress the engine vibrations transmitted from the intake pipe 32 to the pressure sensor 35. The springiness of the cantilevered arm member 61 and the flexibility of the hose 74 absorb the engine vibrations, and the pressure sensor 35 is stably supported by the arm member 61 and the hose 74. Furthermore, the outer surface of the support base 55 is covered with a rubber membrane, and a rubber membrane is interposed between the support base 55 and the base end 62 of the arm member 61, so that the engine vibrations transmitted from the intake pipe 32 to the arm member 61 are absorbed by the rubber membrane.

[0024] Furthermore, the weld nut 56 and the nipple 57 on the support base 55 are adjacent to each other in the vehicle width direction perpendicular to the center line C of the intake passage of the intake pipe 32. An arm member 61 is fixed to the weld nut 56, and the arm member 61 extends diagonally rearward from the weld nut 56, with a protrusion 64 of the arm member 61 positioned rearward of the nipple 57. In a top view, the protrusion 64 of the arm member 61, the nipple 57, and the hose 74 are disposed on the center line C of the intake passage of the intake pipe 32. In this manner, the arm member 61, the hose 74, the weld nut 56, and the nipple 57, which are parts related to the pressure sensor 35, are disposed compactly on the intake pipe 32.

[0025] In particular, because the weld nut 56 and the nipple 57 are adjacent to each other in the vehicle width direction, the front-to-rear width of the parts related to the pressure sensor 35 is kept small, and the pressure sensor 35 is contained within the front-to-rear length of the intake pipe 32. The parts related to the pressure sensor 35 do not impede the layout of the injector 85 and the like of the throttle body 33, and the pressure sensor 35 and the like do not interfere with the injector 85. In addition, because the protrusion 64 and the nipple 57 are aligned on the center line C, the pressure sensor 35 is positioned inside the intake pipe 32 relative to the weld nut 56, i.e., in the center of the intake pipe 32. A gap can be secured between the pressure sensor 35 and other intake system parts.

[0026] The front ends of a pair of cylindrical portions 81 of the throttle body 33 are inserted into the rear ends of the rubber pipes 51 of the pair of intake pipes 32. A clamp 82 is provided on the outer circumferential surface of the rubber pipe 51, and the pipe 51 is fastened to the cylindrical portions 81 from the outside by the clamp 82, thereby fixing the throttle body 33 to the pair of intake pipes 32. A shaft (not shown) is journalled inside the throttle body 33, and a pair of throttle valves 83 for opening and closing the intake passages of the pair of cylindrical portions 81 are attached to the shaft. A motor 84 for driving the shaft is fixed to the right side surface of the throttle body 33.

[0027] A pair of injectors 85 are attached to the upper surfaces of the pair of cylindrical portions 81, and a delivery pipe 86 is connected to the pair of injectors 85. The pair of injectors 85 penetrate the cylindrical portion 81, and are inclined so as to face the downstream ends (front ends) of the pair of intake pipes 32. Fuel is supplied from the delivery pipe 86 to the pair of injectors 85, and the fuel is injected from the pair of injectors 85 toward a pair of intake ports (not shown) downstream of the pair of intake pipes 32. The pair of injectors 85 are disposed behind the pair of pressure sensors 35, and a sufficient gap is secured between the injectors 85 and the pressure sensors 35.

[0028] As shown in Fig. 5, a pair of engine suspension parts 47 are provided on the rear surface of the cylinder head 43 on the outer side in the vehicle width direction with the pair of intake pipes 32 in between. In top view, the pair of pressure sensors 35 are disposed between the pair of engine suspension parts 47, i.e., in the space surrounded by the rear surface of the cylinder head 43 and the pair of engine suspension parts 47. The space between the pair of engine suspension parts 47 is a dead space, and the dead space is effectively utilized as the arrangement space for the pair of pressure sensors 35. This ensures a sufficient gap between the pair of pressure sensors 35 and other intake system components.

[0029] As shown in Fig. 6, the pressure sensor 35 is disposed below the upper end of the cylinder head cover 44 and above the engine suspension portion 47 in a side view. By disposing the pressure sensor 35 above the engine suspension portion 47, the pressure sensor 35 is easier to remove, improving maintainability. The engine suspension portion 47 is supported on the main frame 12 by an engine suspension bracket 19 (see Fig. 1). The pressure sensor 35 is covered from the side by the engine suspension bracket 19, and the engine suspension bracket 19 protects the pressure sensor 35 from foreign matter and the like that is scattered from the side.

[0030] In a side view, the pressure sensor 35 is disposed on the base end side (forward) of the tip of the engine suspension portion 47. The pressure sensor 35 and the injector 85 are disposed at approximately the same height, but since the pressure sensor 35 does not protrude in the direction beyond the tip of the engine suspension portion 47, the pressure sensor 35 does not interfere with the injector 85 behind the engine suspension portion 47. In addition, it is easy to ensure a gap between the pressure sensor 35 and other intake system components. By ensuring a gap between the pressure sensor 35 and other intake system components, it is also easy to ensure a wiring route for cables and the like connected to the connector 73 of the pressure sensor 35.

[0031] The assembly work of the pressure sensor will be described with reference to Fig. 7. Fig. 7 is a diagram showing the assembly work of the pressure sensor of this embodiment.

[0032] As shown in Fig. 7(A), a support base 55 is formed on the upper surface of the intake pipe 32, and a welded nut 56 and a nipple 57 are provided on the upper surface of the support base 55. The surface of the support base 55 is covered with a rubber film, and the welded nut 56 and the nipple 57 protrude upward from the rubber film. The welded nut 56 and the nipple 57 are adjacent to each other in the vehicle width direction, the welded nut 56 is disposed to the right of the center line C of the intake pipe 32, and the nipple 57 is disposed directly above the center line C of the intake pipe 32. The nipple 57 penetrates the support base 55, and the pipe of the nipple 57 is connected to the intake passage.

[0033] 7(B), arm member 61 is attached to weld nut 56 on support base 55. In this case, a fitting hole (not shown) is formed in the underside of base end 62 of arm member 61, and the fitting hole of base end 62 is fitted into weld nut 56 from above. By fitting the fitting hole of base end 62 into weld nut 56, arm member 61 is positioned so that protrusion 64 of arm member 61 is located directly behind nipple 57. A bolt 65 is inserted into base end 62 of arm member 61 from above, and bolt 65 is tightened into weld nut 56 to fix arm member 61 to intake pipe 32.

[0034] As shown in Fig. 7(C), the pressure sensor 35 is attached to the protrusion 64 of the arm member 61. In this case, since the protrusion 64 of the arm member 61 has a snap-fit ​​structure, the protrusion 64 is inserted into a through-hole on the rear side of the pressure sensor 35, thereby attaching the pressure sensor 35 to the arm member 61 with a single touch. In addition, the lower end of the hose 74 is attached to the nipple 57, and the upper end of the hose 74 is connected to the front side of the pressure sensor 35. Once the pressure sensor 35 is attached to the intake pipe 32 in this manner, the mounting holes 54 on both the left and right sides of the flange plate 52 of the intake pipe 32 are screwed to the rear surface of the cylinder head 43 (see Fig. 5).

[0035] As described above, according to this embodiment, with the pressure sensor 35 attached to the intake pipe 32, the intake pipe 32 is assembled to the engine 31. Therefore, the pressure sensor 35 can be easily assembled to the engine 31 together with the intake pipe 32. Also, since the pressure sensor 35 is attached to the intake pipe 32, a sufficient gap can be secured between the pressure sensor 35 and other intake system components even in the narrow space between the engine 31 and the air cleaner 34.

[0036] In this embodiment, the pressure sensor is attached to the intake pipe via an arm member, but the pressure sensor may be attached directly to the intake pipe.

[0037] In this embodiment, the intake pipe is provided with a welded nut as an attachment portion, but the attachment portion may be formed so as to be able to attach the pressure sensor. The attachment portion is not limited to the top surface of the intake pipe, and may be provided at any position on the outer circumferential surface of the intake pipe as long as a gap can be secured between the pressure sensor and other intake system components.

[0038] In this embodiment, the pressure sensor detects the pressure in the intake passage of the intake pipe, but the pressure sensor may detect the pressure in the intake passage of the throttle valve. In this case, a nipple is formed in the throttle valve, and the pressure sensor and the nipple are connected via a hose.

[0039] In addition, in this embodiment, the mounting portion and the nipple are adjacent to each other in the vehicle width direction, but the positional relationship between the mounting portion and the nipple is not particularly limited as long as a gap can be secured between the pressure sensor and other intake system components.

[0040] In addition, in this embodiment, the protrusion is positioned behind the nipple, but the positional relationship between the nipple and the protrusion is not particularly limited as long as a gap can be secured between the pressure sensor and other intake system components. Therefore, the nipple and the protrusion do not have to be positioned on the center line of the intake pipe.

[0041] In addition, in this embodiment, the pressure sensor is disposed between a pair of engine suspension parts when viewed from above, and is disposed below the upper end of the engine and above the engine suspension parts when viewed from the side, but the positional relationship between the engine suspension parts and the pressure sensor is not particularly limited as long as a gap can be secured between the pressure sensor and other intake system components.

[0042] The intake device of the present embodiment may be used in other types of saddle-ride vehicles, not limited to the saddle-ride vehicle shown in the drawings. A saddle-ride vehicle is not limited to vehicles in general on which a rider sits astride a seat, but also includes small scooter-type vehicles on which a rider does not sit astride a seat.

[0043] As described above, the intake device of this embodiment is an intake device in which the air cleaner (34) is disposed behind the engine (31) and air is introduced from the air cleaner through the intake passage into the engine, and includes a pressure sensor for detecting the pressure in the intake passage, a throttle body (33) forming the upstream side of the intake passage, and an intake pipe (32) forming the downstream side of the intake passage, and a mounting portion (welded nut 56) for mounting the pressure sensor is formed on the outer circumferential surface of the intake pipe. According to this configuration, the intake pipe is assembled to the engine with the pressure sensor attached to it. Therefore, the pressure sensor can be easily assembled to the engine together with the intake pipe. In addition, since the pressure sensor is attached to the intake pipe, a sufficient gap can be secured between the pressure sensor and other intake system components even in the narrow space between the engine and the air cleaner.

[0044] In the intake system of this embodiment, the mounting portion is formed on the upper surface of the intake pipe. With this configuration, the pressure sensor is mounted on the upper surface of the intake pipe, which improves the ease of installation of the pressure sensor and ensures a gap between the pressure sensor and other intake system components.

[0045] In the intake system of this embodiment, a nipple (57) is provided on the upper surface of the intake pipe, which is connected to the downstream side of the intake passage, and a pressure sensor is connected to the nipple via a hose (74), with the nipple adjacent to the mounting portion in the vehicle width direction. With this configuration, the pressure sensor detects the pressure on the downstream side of the intake passage through the hose. In addition, the parts related to the pressure sensor are arranged compactly. In particular, since the nipple and the mounting portion are adjacent to each other in the vehicle width direction, the front-to-rear width of the parts related to the pressure sensor is reduced, the parts related to the pressure sensor do not obstruct the layout of the injectors of the throttle body, and the pressure sensor does not interfere with the injectors.

[0046] The intake device of this embodiment includes a resin arm member (61) that supports the pressure sensor at one end, a base end (62) of the arm member that is fixed to the mounting portion, and a protrusion (64) that holds the pressure sensor is formed at a tip end (63) of the arm member, the protrusion being located behind the nipple. With this configuration, the springiness of the resin arm member reduces engine vibrations transmitted to the pressure sensor. The pressure sensor is supported from below by a hose extending from the nipple, and the flexibility of this hose reduces engine vibrations transmitted to the pressure sensor. In addition, because the protrusion is located behind the nipple, the protrusion does not impede the freedom of arrangement of the nipple and mounting portion.

[0047] In the intake system of this embodiment, the protrusion and the nipple are arranged on the center line of the intake pipe when viewed from above. With this configuration, the protrusion and the hose are aligned on the center line of the intake pipe, so that the pressure sensor is arranged in the center of the intake pipe, and a gap can be secured between the pressure sensor and other intake system components.

[0048] In the intake system of this embodiment, a pair of engine suspension parts (47) are provided on the engine on either side of the intake pipe in the vehicle width direction, and the pressure sensor is disposed between the pair of engine suspension parts when viewed from above. With this configuration, the pressure sensor is disposed in the dead space between the pair of engine suspension parts, thereby ensuring a gap between the pressure sensor and other intake system components.

[0049] In the intake system of the present embodiment, the pressure sensor is disposed below the upper end of the engine and above the pair of engine suspension parts in a side view. With this configuration, the pressure sensor is disposed above the pair of engine suspension parts, which makes the pressure sensor easier to remove and improves maintainability.

[0050] In the intake system of this embodiment, the pressure sensor is disposed on the base end side of the tips of the pair of engine suspension parts in a side view. With this configuration, the pressure sensor does not protrude beyond the tips of the pair of engine suspension parts, making it easier to ensure a gap between the pressure sensor and other intake system components.

[0051] Although the present embodiment has been described, other embodiments may be made by combining the above-described embodiments and modifications in whole or in part.

[0052] In addition, the technology of the present invention is not limited to the above examples, and may be modified, substituted, or altered in various ways without departing from the spirit of the technical idea. Furthermore, if the technical idea can be realized in a different way due to the progress of technology or a different technology derived therefrom, the invention may be implemented using that method. Therefore, the claims cover all embodiments that may be included within the scope of the technical idea. [Explanation of symbols]

[0053] 31: Engine 32: Intake pipe 33: Throttle body 34: Air cleaner 35: Pressure sensor 47: Engine suspension 56: Welded nut (mounting part) 57: Nipple 61: Arm component 62: Proximal end 63:Tip 64:Protrusion 74: Hose

Claims

1. An intake system comprising an air cleaner disposed behind an engine and adapted to introduce air from the air cleaner through an intake passage into the engine, a pressure sensor for detecting a pressure in the intake passage; a throttle body that defines an upstream side of the intake passage; an intake pipe forming a downstream side of the intake passage, a mounting portion for mounting the pressure sensor on an upper surface of the intake pipe; a nipple connected to a downstream side of the intake passage is provided on an upper surface of the intake pipe, and the pressure sensor is connected to the nipple via a hose, An intake device, wherein the nipple is adjacent to the mounting portion in a vehicle width direction.

2. a resin arm member that supports the pressure sensor at one end, a base end of the arm member is fixed to the mounting portion, and a protrusion for holding the pressure sensor is formed at a tip end of the arm member, 2. The intake system of claim 1, wherein the protrusion is located rearward of the nipple.

3. 3. The intake system according to claim 2, wherein the protrusion and the nipple are disposed on a center line of the intake pipe when viewed from above.

4. The engine is provided with a pair of engine suspension parts on outer sides in a vehicle width direction with the intake pipe therebetween, 4. The intake system according to claim 1, wherein the pressure sensor is disposed between the pair of engine suspension parts when viewed from above.

5. 5. The intake system according to claim 4, wherein the pressure sensor is disposed below an upper end of the engine and above the pair of engine suspension parts in a side view.

6. 6. The intake system according to claim 4, wherein the pressure sensor is disposed closer to a base end than to tips of the pair of engine suspension parts in a side view.

Images