KR100551746B1 - Intaking device for motorcycle engine - Google Patents

Abstract

The present invention aims to reduce the number of parts and the number of assembly labor of the intake apparatus including the air cleaner.

The intake pipe 12 is formed integrally with the air cleaner case body 101, and the throttle body 22 is disposed in the air cleaner case. The inlet pipe 12 is provided with a fuel injection valve mounting portion 17 on which the fuel injection valve 18 is mounted, and the injector holder 19 is covered. The ECU 21 is also housed in the air cleaner case. The drive signal is supplied from the ECU 21 to the fuel injection valve 18 via the coupler 20. A force for pushing the coupler 20 into the case main body 101 acts on the injector holder 19 in accordance with an operation of removing the holder 19 from the fuel injection valve mounting portion 17.

Description

Engine Intake Units {INTAKING DEVICE FOR MOTORCYCLE ENGINE}

1 is a cross-sectional view of an intake apparatus according to an embodiment of the present invention.

2 is a side view showing the form of a frame of a motorcycle on which an intake apparatus is mounted.

3 is a perspective view showing an appearance of a fuel injection valve mounting portion.

4 is a cross-sectional view of the assembly of the fuel injection valve and the injector holder.

<Explanation of symbols for main parts of drawing>

1: main frame 5: cylinder block

6: cylinder head 10: air cleaner

11 intake apparatus 12 intake pipe

14: intake port 15, 16: band

17: fuel injection valve mounting portion 18: fuel injection valve

19: Injector Holder 20: Coupler

21: ECU 22: Throttle Body

25: cable guide 101: air cleaner case body

102: lid 103: air cleaner element

104: coupler holding part 222: throttle valve

223 throttle cable

The present invention relates to an engine intake apparatus, and more particularly, to an engine intake apparatus suitable for reducing the number of parts and assembly labor.

An intake apparatus provided in an engine mounted on a motorcycle includes an intake pipe, a throttle body, a mixing pipe, and an air cleaner, and these parts are arranged in sequence from the engine side toward the upstream in the intake direction. The throttle body is provided with a drum for opening and closing the throttle valve in the throttle body, and the throttle cable is wound around the drum. In addition, around the intake apparatus, electric components such as various sensors attached to the engine main body and the intake machine, and parts such as electric wires connected to the electrical components are arranged. In addition, the inlet pipe is provided with an injector, that is, a fuel injection valve. Such an intake apparatus is disclosed, for example, in Japanese Patent Laid-Open No. 2000-337167. An intake apparatus in which a fuel injection valve is attached to a throttle body is also known (Japanese Patent Laid-Open No. 2000-16369).

There are many parts in the intake apparatus and the surroundings described above, and since they are connected to each other by a band or the like, the number of parts is also increased. The connection parts of each other require a high processing precision, such as grinding to secure the seal. In particular, the finishing of the fuel injection valve mounting surface of the injector holder holding the fuel injection valve is carried out with an effort to secure the seal.

The injector holder is fixed to the fuel injection valve mounting portion by a bolt to hold the fuel injection valve.

As described above, the conventional intake apparatus has a large number of parts, resulting in a large amount of air consumption for processing, mounting, adjustment, and the like. In addition, this large amount of airflow also complicates maintenance.

This invention is made | formed in view of the said situation, and an object of this invention is to provide the engine intake apparatus which can reduce the number of parts or improve a structure, and can reduce the airflow at the time of manufacture and maintenance.

In order to achieve the above object, the present invention provides an intake pipe coupled to an intake port of an engine, a throttle body coupled to an intake upstream side of the intake pipe, and an air cleaner element disposed at an intake upstream side of the throttle body. An intake apparatus for an engine having a gas, comprising: an air cleaner case integrally formed together with the intake pipe, wherein the air cleaner element and the throttle body are disposed in the air cleaner case.

According to the first aspect, since the intake pipe is integrally molded with the air cleaner case, the number of parts and the connection between the air cleaner case and the intake pipe are unnecessary, so that the man-hour of assembly can be reduced. In addition, since the throttle body is accommodated in the air cleaner case together with the air cleaner element, the appearance can be improved.                         

Further, the present invention has a second feature in that the fuel injection valve mounting portion for mounting the fuel injection valve in the intake pipe in the fuel injection direction is integrally formed with the intake pipe.

According to the second aspect, since the fuel injection valve mounting portion is integrally formed with the intake pipe, the fuel injection valve is positioned in accordance with a predetermined injection direction in the intake pipe only by attaching the fuel injection valve to the fuel injection valve mounting portion. . Therefore, assembly adjustment is easy.

In addition, the present invention includes an injector holder for holding a fuel injection valve mounted to the fuel injection valve mounting portion, wherein the fuel injection valve mounting portion and the injector holder is composed of a hook portion formed on one side and a hook hole formed on the other side. There is a third feature in that they are combined with each other in a snap fit structure.

According to the third feature, the hook and the hook hole are joined to form a so-called snap fit structure, and the injector holder can be fixed to the fuel injection valve mounting portion with one touch.

Moreover, this invention has a 4th characteristic in the point which doubled the said snap-fit structure. According to the fourth feature, when the snap fit structure of one side causes a defect, the other side can maintain the coupling with each other.

Moreover, in this invention, when the said injector holder moves this injector holder away from the said fuel injection valve mounting part, a force is applied so that the coupler side may come out from the feed part of a fuel injection valve earlier than the said injector holder. There is a fifth feature in that an arm having a gradient surface to be provided is provided.                         

According to the fifth aspect, the coupler can be detached from the feed section before the injector holder is detached from the fuel injection valve, so that the fuel injection valve can be easily removed.

Moreover, this invention has the 6th characteristic that the said injector holder is equipped with the cap part in close contact with the outer periphery of the fuel supply bracket of a fuel injection valve, and the fuel supply hose plug which communicates with this cap part.

According to the sixth aspect, the fuel pressure is caught in the fuel supply detention, and the fuel injection valve is urged on the fuel injection valve mounting portion side. Therefore, the seal between the fuel injection valve and the fuel injection valve mounting portion is assured.

Further, the present invention has a seventh feature in that an ECU for engine control is further accommodated in the air cleaner case. According to the seventh aspect, since the ECU is housed in the air cleaner case, the ECU can be protected from external factors such as water, mud and external force.

In addition, the present invention has the eighth feature in that the ECU supplies a driving signal corresponding to the fuel injection amount to the feed section of the fuel injection valve through a coupler. According to the eighth feature, since the fuel injection valve mounted on the fuel injection valve mounting portion formed integrally with the air cleaner case is close to the ECU, a drive signal can be supplied from the ECU to the fuel injection valve over a short distance.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described according to one Example of this invention shown in an accompanying drawing. FIG. 2 is a left side view showing a main part of a motorcycle including an engine equipped with an intake apparatus according to an embodiment of the present invention. The body frame F of a motorcycle consists of the main frame 1 made of steel pipes inclined to the rear lower part, and the rear frame 2 made of steel pipes welded to the rear end of this main frame 1. . At the front end of the main frame 1, a head pipe 3 is connected, which steerably rotatably holds the front forks (all not shown) bearing the front wheels. A saddle is attached to the upper surface of the rear frame 2, and immediately below the saddle, a fuel tank is stored and held. The rear frame 2 is rotatably held by a rear fork bearing the rear wheels. Saddles, fuel tanks, rear wheels, rear forks and the like are not shown because they are not a major part of the present invention.

The crankcase 4 of the engine E is mounted below the engaging portion with the main frame 1 at the front end of the rear frame 2. The crankcase 4 constitutes an engine body together with the cylinder block 5 and the cylinder head 6. The cylinder block 5 protrudes forward from the front surface of the crankcase 4 and is disposed almost horizontally, and the cylinder head 6 is coupled to the front surface of the cylinder block 5. The cylinder block 5 is connected to the lower end of the bracket 8 welded to the main frame 1. An intake apparatus 11 including an air cleaner 10 is disposed above the engine E and below the main frame 1.

The intake apparatus 11 will be described in detail with reference to the enlarged view. 1 is an enlarged cross-sectional view of the intake apparatus 11. In the same figure, the air cleaner 10 has the air cleaner case which consists of the case main body 101 and the lid 102 attached to the main frame 1. An air cleaner element 103 is disposed between the case body 101 and the lid 102. The air cleaner element 103 has a protruding edge 103a, and the edge 103a is fitted into a groove formed in the end surface of the case body 101 and the lid 102 to fix the position.

The intake pipe 12 protrudes from the case body 101 and is integrally formed with the case body 101, and the lower end of the intake pipe 12 is connected to the upper end of the heat insulating material 13. In addition, the lower end of the heat insulating material 13 is connected to the intake port 14 provided in the cylinder head 6. The connection between the intake pipe 12 and the upper end of the heat insulating material 13 and the connection between the lower end of the heat insulating material 13 and the intake port 14 are performed by fitting with each other and fastening using the bands 15 and 16. All.

The fuel injection valve mounting portion 17 is formed integrally with the intake pipe 12. As a material of the case main body 101 (including the intake pipe 12) and the lid 102, for example, polypropylene can be used. The fuel injection valve mounting portion 17 is equipped with a fuel injection valve 18 having a fuel injection direction directed at the center of the intake pipe 12. The upper part of the fuel injection valve 18 is covered with the injector holder 19. As a material of the injector holder 19, polyacetal can be used, for example. The fuel injection valve 18 includes a power supply unit 181, which is fed from the ECU 21 to the power supply unit 181 through the coupler 20. The ECU 21 is a control device for engine control and includes a microcomputer. The coupler 20 is inserted into and maintained in the cylindrical coupler holding part 104 formed in the case main body 101, and the driving signal according to the fuel injection amount is supplied to the power supply part 181 through the coupler 20. On off duty signal).

The throttle body 22 is disposed in the case body 101. The throttle body 22 is positioned so that the cylindrical lower end (downstream end of the air flow) is inserted into the upper end of the intake pipe 12, and is attached to the case body 101 by suitable coupling means such as a bolt (not shown). do. The contact portion between the throttle body 22 and the case body 101 is secured by interposing a sealing member 224 such as an o-ring.

In the throttle body 22, a butterfly-type throttle valve 222 for opening and closing the intake passage 221 is supported. The throttle valve 222 has a drum (not shown), and is configured to be rotatable from the outside by a throttle cable 223 wound around the drum. The throttle cable 223 is guided into the cable guide 25 and drawn out of the case body 101.

The upper end (upstream end of the air flow) of the throttle body 22 is an opening formed in a funnel shape or a horn shape, and is opened inside the case body 101. Air introduced through the air cleaner element 103 is received into the throttle body 22 from this opening.

In the space surrounded by the case body 101 and the air cleaner element 103, the ECU 21 can be accommodated in addition to the throttle body 22. The ECU 21 controls the engine E in accordance with information indicating an operating state of the engine detected using a detection sensor (not shown) such as the throttle opening degree, the engine speed, the engine temperature, and the like. Specifically, the fuel injection amount by the fuel injection valve 18 is determined, and the fuel injection valve 18 is driven with the duty corresponding to it. An electrical signal for driving the fuel injection valve 18 is supplied from the feed section 181 to the fuel injection valve 18 via a cable 24. In addition, a battery (not shown) is mounted on the motorcycle to supply power to the ECU 21.

3 is a perspective view of the lower part of the air cleaner 10 including the fuel injection valve mounting unit 17, and FIG. 4 is a sectional view of the fuel injection valve mounting unit to which the injector holder is mounted. In both figures, the fuel injection valve mounting portion 17 includes a cap portion 197 in which the fuel injection valve 18 is accommodated and fits around the upper portion of the fuel injection valve 18, that is, the fuel supply detention 182. Injector holder 19 is combined. O-rings 183 and 184 are disposed in the seat portions of the fuel supply detention 182 and the fuel injection valve 18, respectively, and form seals on the inner walls of the injector holder 19 and the fuel injection valve mounting portion 17. Doing.

The cap portion 197 has a space A above the fuel supply mold 182, and the space A communicates with the fuel supply hose plug 196 formed in the cap portion 197. A fuel supply hose (not shown) is coupled to the fuel supply hose plug 196, and the fuel supply hose is connected to a fuel pump (not shown) disposed in the fuel tank. By this structure, the pressure of the fuel supplied through the fuel supply hose is imposed on the surface of the fuel supply detention 182, and the seat portion of the fuel injection valve 18 is pressed against the fuel injection valve mounting portion 17, as a result. , High sealing property is obtained.

By the pressure of the fuel, a force is applied to the injector holder 19 to separate the injector holder 19 from the fuel injection valve mounting portion 17. However, the ejection of the injector holder 19 by the structure described below is avoided, and reliable support is maintained.

The primary hook 192 formed of a hook formed on the lower end of the extension 191 of the injector holder 19 has a ring-shaped hook hole (hook hole) 171 formed on the lower outer surface of the fuel injection valve mounting unit 17. Is engaged with. The same engagement portions as those of the hook holes 171 and the primary hooks 192 are provided on the opposite side by sandwiching the central axis of the fuel injection valve mounting portion 17 (Fig. 4).

In the hook hole 194 formed in the trunk portion 193 of the injector holder 19, a secondary hook 172 protruding from the upper outer surface of the fuel injection valve mounting portion 17 is engaged from the inside. The same engagement portion as the engagement portion by the hook hole 194 and the secondary hook 172 is also provided on the opposite side by sandwiching the central axis of the fuel injection valve mounting portion 17.

Moreover, the arm-shaped hook (tertiary hook) 195 which protrudes from the trunk part 193 of the injector holder 19 to the case main body 101 side is a granular part formed in the side of the fuel injection valve mounting part 17 ( 173).

In this way, the injector holder 19 is securely held in the fuel injection valve mounting portion 17 by the three-six hook structure, that is, the snap fit structure, and held by the injector holder 19 and the fuel injection valve mounting portion 17. The injected fuel injection valve 18 is positioned at a predetermined position.

Although the injector holder 19 can be secured to the fuel injection valve mounting part 17 by the said primary hook and the secondary hook with respect to fuel pressure and external force, in particular, by employing the double hook structure, for example, Even when the primary hook 192 is broken, the coupling between the injector holder 19 and the fuel injection valve mounting portion 17 is loosened because the secondary hook 172 is engaged with the injector holder 19. However, departures from each other are avoided.

Further, the tertiary hook 195 has a gradient on its upper end surface, and forms a cam such that the surface having the gradient engages with the end face of the coupler 20. Therefore, when the operation of removing the injector holder 19 (operating to release the engagement by each hook to displace the injector holder 19 above the drawing) for maintenance of the fuel injection valve 18, etc., The component force due to the gradient of the upper end surface of the tertiary hook 195 is actuated to couple the coupler 20 to the inside of the case body 101. As a result, the coupler 20 can be easily removed from the power feeding portion 181.

The tertiary hook 195 detaches the coupler 20 from the power supply unit 181 when the primary hook 192 is pulled out and the coupling between the injector holder 19 and the fuel injection valve mounting unit 17 is loosened. The fuel injection valve 18 is also stopped.

An example of the assembling procedure of the intake apparatus 11 of the said structure is demonstrated. First, the end of the throttle body 22, in which the drum for winding the throttle valve, the ECU, or the throttle cable is assembled, is inserted into the intake pipe 12 formed in the case main body 101. Next, the throttle body 22 is fixed to the case body 101 with a bolt or the like. In addition, the cable guide 25 is inserted into the case main body 101, and the throttle cable 223 is passed therethrough, and the end is wound around the drum.

Next, the fuel injection valve 18 is seated on the fuel injection valve mounting portion 17, the injector holder 19 is mounted, and the primary hook 192, the secondary hook 172, and the like are respectively provided with predetermined hook holes. The fuel injection valve 18 is secured. Since the fuel injection valve mounting portion 17 is integrally formed with the intake pipe 12, the positions of the fuel injection valve 18 and the intake pipe 12 are automatically positioned at predetermined positions. Next, the coupler 20 is connected to the power supply unit 181.

Then, the case body 101 and the lid 102 are combined in a state where the edges of the air cleaner element 103 are sandwiched, and fixed with a bolt or the like not shown. Finally, the upper part of the case body 101 is fixed to the main frame 1 in a state where the intake pipe 12 is inserted into the heat insulating material 13, and the intake pipe 12 and the heat insulating material 13 are banded. Fasten. In addition, this assembling procedure is an example and can be changed suitably.

As mentioned above, although this invention was demonstrated with reference to preferable embodiment, this invention is not limited to this embodiment, A various change can be made without deviating from the scope of the invention as described in a claim.

For example, the combination of the hook and the hook hole forming the snap fit is not limited to that of the embodiment, and can be arbitrarily selected whether the hook or hook hole is to be installed on the injector holder or the fuel injection valve mounting portion.

As described above, according to the present invention, the number of parts and the number of assembly labor can be reduced. Specifically, according to the invention of claim 1, since the intake pipe and the air cleaner case are integrated, the number of parts and the number of assembly labor can be reduced. According to the invention of claim 2, the assembling adjustment of the fuel injection valve becomes easy, and cutting is reduced by integral molding.

According to the inventions of Claims 3 and 4, the injector holder can be coupled to the fuel injection valve mounting portion by one touch by the snap fit structure. In particular, according to the invention of claim 5, the double snap fit structure maintains the coupling between the injector holder and the fuel injection valve mounting portion on the other side, even when one side is removed by damage or the like.

According to the invention of claim 5, the operation of detaching the coupler from the feed section of the fuel injection valve is simplified. In addition, when the injector holder is removed, the power supply to the fuel injection valve is automatically cut off and the fuel supply is cut off.

According to the invention of claim 6, fuel pressure is imposed on the fuel supply detention, and the fuel injection valve is biased on the fuel injection valve mounting side. Thus, the seal between the fuel injection valve and the fuel injection valve mounting portion is assured.

According to the invention of claim 7, the ECU can be protected. According to the invention of claim 8, since the fuel injection valve and the ECU are close to each other, the line for supplying a signal from the ECU to the fuel injection valve can be shortened.

Claims (8)

An intake apparatus of an engine having an intake pipe coupled to an intake port of an engine, a throttle body coupled to an intake upstream side of the intake pipe, and an air cleaner element disposed on an intake upstream side of the throttle body, An air cleaner case integrally formed with the intake pipe; The intake upstream side of the intake pipe extends inwardly of the air cleaner case, The air cleaner element and the throttle body are disposed in the air cleaner case. The method of claim 1, An engine intake apparatus, wherein a fuel injection valve attaching portion for mounting a fuel injection valve in which the fuel injection direction is directed in the intake pipe is integrally formed together with the intake pipe. The method of claim 2, An injector holder for holding a fuel injection valve mounted to the fuel injection valve mounting unit; The fuel injection valve mounting portion and the injector holder, the intake apparatus of the engine, characterized in that combined with each other in a snap fit structure consisting of a hook portion formed on one side and a hook hole formed on the other side. The method of claim 2, It is provided with an injector holder for holding a fuel injection valve mounted to the fuel injection valve mounting portion, The fuel injection valve mounting portion and the injector holder may include a first hook including a hook formed in the injector holder and a hook hole formed in the fuel injection valve mounting portion, and a hook hole formed in the fuel injection valve mounting portion and a hook hole formed in the injector holder. An intake apparatus for an engine, characterized in that combined with each other in a dual snap fit structure by a hook. The method according to claim 3 or 4, When the injector holder moves the injector holder in a direction to be detached from the fuel injection valve mounting portion, an arm having a gradient surface that exerts a force so that the direction of the coupler comes away from the feed portion of the fuel injection valve before the injector holder. An intake apparatus of an engine, characterized in that it is provided. The method according to claim 3 or 4, The injector holder is provided with a cap part in close contact with the outer circumference of the fuel supply bracket of the fuel injection valve, and a fuel supply hose plug in communication with the cap part. The method according to any one of claims 1 to 4, An engine intake apparatus, further comprising an ECU for engine control in the air cleaner case. The method of claim 7, wherein And the ECU supplies a driving signal according to the fuel injection amount to the feed section of the fuel injection valve through a coupler.

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