JP3074971B2 - Outboard throttle guide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle guide for an outboard motor, and more particularly to a method of recovering unburned gas generated in an engine into an intake system without clogging even if the gas is liquefied. In addition, the intake air temperature sensor can be attached without requiring any anti-vibration measures or heat measures, and the intake air temperature sensor can accurately detect the intake air temperature, and the intake air temperature correction of the fuel injection amount by the fuel injection valve can be performed. The present invention relates to a throttle guide for an outboard motor that can be properly performed.

[0002]

2. Description of the Related Art In an outboard motor equipped with a four-cycle engine, there is a type in which unburned gas generated by the engine is collected in an intake system and reburned. For example, in a four-cycle engine, blow-by gas in a crankcase and vapor gas in a vapor separator are collected in an intake system and reburned.

[0003] Japanese Unexamined Patent Publication No. Hei 3 (1994) discloses a technique for recovering unburned gas generated in an engine into an intake system and reburning it.
Japanese Unexamined Patent Publication (Kokai) No. 172570/1990 discloses an example. As disclosed in this publication, as shown in FIG.
A carburetor 212 is disposed between each of the branch pipes 208 of the intake manifold 206 of the engine 204 and the surge tank 210, and the blow-by gas supply pipe 214 is provided in the surge tank 210 upstream of the carburetor 212. Are provided in communication.

[0004]

However, in the outboard motor disclosed in the above publication, a blow-by gas pipe 214 is provided so as to communicate with a surge tank 210 having a lower intake flow rate than an evaporator 212. Therefore, there was a problem that the blow-by gas could not be collected well.

[0005] Some 4-cycle engines have a fuel injection valve. The fuel injection amount of the fuel injection valve is
It is necessary to correct it by the intake air temperature.

However, there is a problem that the intake air temperature sensor for detecting the intake air temperature cannot accurately detect the intake air temperature depending on the mounting position. For this reason, when the intake air temperature sensor is mounted at an inappropriate position, the intake air temperature cannot be accurately detected, and there is a disadvantage that the intake air temperature correction of the fuel injection amount cannot be properly performed.

[0007]

SUMMARY OF THE INVENTION Accordingly, in order to eliminate the above-mentioned disadvantages, the present invention provides a crankcase, a cylinder block, and a cylinder in an engine cover and an undercover of an outboard motor in order from front to rear in the traveling direction. A head and an engine supported by a crankcase with a crankshaft directed substantially vertically to the cylinder block are mounted on the cylinder block, and the engine is provided on one side in a direction intersecting the traveling direction of the outboard motor. A surge tank disposed forward of the crankcase, and branching from the surge tank and extending from the front to the rear along both the engine side surface and the engine cover inner surface, and communicating with each intake port provided on one side of the cylinder head. An intake manifold comprising a plurality of branch pipes each having a plurality of branch pipes. An outboard motor equipped with a four-stroke engine having a fuel injection valve at a position adjacent to the dahead has a throttle valve at a position upstream of the surge tank of the intake manifold and forward of the crankcase. A single throttle body is provided, and the throttle body is disposed substantially horizontally with the body intake passage directed to the other side of the outboard motor while being substantially orthogonal to the branch intake passage of each of the branch pipes, On the upstream side of the throttle body, there is provided a cylindrical throttle guide formed of a flexible and elastic material that is hardly affected by vibration propagation or thermal influence from the engine, and this throttle guide has a guide intake passage and the body intake passage. A coaxial shaft is disposed substantially horizontally with the other side of the outboard motor directed toward the other side, and a blow-off gas generated by the engine is collected. A vapor gas supply pipe or a vapor gas supply pipe for recovering vapor gas generated by the vapor separator is provided on the upper wall of the throttle guide so as to be substantially vertically downwardly directed so as to be substantially perpendicular to the guide intake passage and communicate therewith. The tip of an intake air temperature sensor for correcting the fuel injection amount based on the intake air temperature faces the guide intake passage on the throttle guide, and is located at a position deviated from the mounting position of the blow-by gas supply pipe and the vapor gas supply pipe. It is characterized by being attached and provided.

[0008]

According to the structure of the present invention, a surge tank is provided on one side of a four-cycle engine mounted on an outboard motor with the crank axis directed substantially vertically, and the surge tank is branched from the surge tank and the engine side. A single intake manifold comprising a plurality of branch pipes extending from the front to the rear along both inside surfaces of the cover is provided, and a throttle valve is provided at a position upstream of the surge tank of the intake manifold and forward of the crankcase. One throttle body is provided, and further upstream of the throttle body, a cylindrical throttle guide is directed to the other side of the outboard motor with the guide intake passage coaxial with the throttle body body intake passage. It is arranged almost horizontally. Since the function of this throttle guide is to guide the intake air to the throttle body, no mechanical strength is required, so the throttle guide is formed of a flexible and elastic material that is not easily affected by vibration propagation or thermal influence from the engine. I have.

A blow-by gas supply pipe for collecting blow-by gas generated by the engine or a vapor gas supply pipe for collecting vapor gas generated by the vapor separator is provided on the upper wall of the throttle guide so as to be substantially orthogonal to the guide intake passage. It is provided so as to be attached and communicated so as to be directed substantially below the vertical line. As described above, since the blow-by gas supply pipe or the vapor gas supply pipe is provided in communication with the guide intake passage in which the intake air flows quickly without stagnation, the blow-by gas and the vapor gas, which are unburned gases, can be sufficiently collected. it can. In addition, the blow-by gas supply pipe and the vapor gas supply pipe are attached to the upper wall of the guide intake passage so as to be directed substantially vertically downward and communicate with each other.
Even if the blow-by gas and the vapor gas are liquefied, they do not accumulate.

In addition, a cylindrical throttle guide formed of a flexible and elastic material has a tip of an intake air temperature sensor for correcting a fuel injection amount based on an intake air temperature facing a guide intake passage and supplying blow-by gas. The pipe and the vapor gas supply pipe are provided at positions deviated from the mounting positions. As described above, the intake air temperature sensor is provided so as to face the body intake passage through which the intake air flows quickly without stagnation, so that the temperature of the intake air flowing toward the engine can be detected. In addition, the intake air temperature sensor is attached to a throttle guide formed of a material having flexibility and elasticity, so that it is less susceptible to vibration propagation and thermal influence from the engine.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 8 show an embodiment of the present invention. 7 and 8, reference numeral 2 denotes an outboard motor. The outboard motor 2 is covered with an engine cover 4, an under cover 6, a drive shaft housing 8, and a gear case 10, and is mounted on a hull (not shown) by a mounting unit 12 mounted in front of the drive shaft housing 8 in the traveling direction. Can be

As shown in FIGS. 4 to 6, the outboard motor 2 has an engine cover 4 and an under cover 6 with a four-cycle engine 14 mounted thereon. The engine 14 has a crankcase 24, a cylinder block 20, and a cylinder head 32 arranged sequentially from the front of the outboard motor 2 to the rear. The outboard motor 2 drives the drive shaft 16 by the engine 14, converts the rotation direction by a gear (not shown), and drives the propeller 18 directed rearward in the traveling direction.

As shown in FIGS. 5 and 6, the engine 14 is supported by a crankcase 24 with a crankshaft 22 directed substantially vertically in a cylinder block 20. The cylinder block 20 includes a plurality of cylinder shaft center lines oriented substantially in the horizontal direction.
The two cylinders 26 are disposed substantially vertically, and each has a built-in piston 28. The pistons 28 are connected to the crankshaft 22 through connecting rods 30, respectively.

A cylinder head 32 is mounted on the cylinder block 20, and a head cover 34 is attached to the cylinder head 32. The cylinder head 32 is provided with an intake port 36 and an exhaust port 38 communicating with each cylinder 26 on one side and the other side in a direction intersecting the traveling direction. The intake port 36 and the exhaust port 38 are provided with an intake valve 40 and an exhaust valve 42. Intake valve 4
The 0 and exhaust valves 42 are opened and closed by an intake rocker arm 44 and an exhaust rocker arm 46 as shown in FIG. Intake rocker arm 44 and exhaust rocker arm 46
Is swung by a cam shaft 48 supported by the cylinder head 32.

The engine 14 has a crank pulley 50 mounted on a crankshaft 22 protruding from the cylinder block 20 and the crankcase 24 above the centerline of the crankshaft. In the engine 14, a cam pulley 52 is attached to a cam shaft 48 protruding from the cylinder head 32 and the head cover 34 above the cam shaft center line. A timing belt 54 is wound around the crank pulley 50 and the cam pulley 52. Reference numeral 56 denotes a generator.

As shown in FIGS. 4 and 5, the engine 14 is provided with an intake manifold 58 located on one side in a direction intersecting the traveling direction of the outboard motor 2. The intake manifold 58 is provided with a surge tank 60 which is a collecting portion disposed in front of the crankcase 24, and a cylinder head 32 branched from the surge tank 60 and extending from the front to the rear along both the side surface of the engine 14 and the inner surface of the engine cover 4. , A plurality of branch pipes 62 extending in the direction of the arrow, and a tank intake passage 64 and a branch intake passage 66 are provided. The downstream side of each branch pipe 62 is provided by being connected by a manifold side mounting portion 68. The manifold-side mounting portion 68 is mounted on the head-side mounting portion 70 of the cylinder head 32, and communicates each branch intake passage 66 with each intake port 36 provided on one side of the cylinder head 32.

Each of the branch pipes 6 is provided in the intake manifold 58.
2 is provided with a fuel injection valve 72. The fuel injection valve 72 is
It is attached to an injection valve attachment portion 74 provided on the manifold side attachment portion 68 at a position close to the cylinder head 32, and is connected to a control unit 130 described later. Fuel injection valve 72
The operation of the intake port 36 is controlled by the control unit 130.
Inject fuel into Reference numeral 76 is a fuel distribution pipe.

In the outboard motor 2 equipped with such an engine 14, as shown in FIG.
A single throttle body 80 is attached to the surge tank 60 on the upstream side of the throttle body with a spacer 78 interposed therebetween.
The throttle body 80 is provided at a position upstream of the surge tank 60 and forward of the crankcase 24, and the outboard motor 2 has a body intake passage 88 substantially orthogonal to the branch intake passage 66 of each branch pipe 62. And is arranged substantially horizontally with the other side. On the upstream side of the throttle body 80,
A cylindrical throttle guide 82 made of a flexible and elastic material that is not easily affected by vibration propagation or thermal influence from the engine 14 is attached and provided. The throttle guide 80 is disposed substantially horizontally with the guide intake passage 96 coaxial with the body intake passage 88 and directed to the other side of the outboard motor 2. At the upstream end of the throttle guide 82, a filter 84 is attached.

Guide intake passage 8 of throttle guide 82
6, the body intake passage 88 of the throttle body 80, and the spacer intake passage 90 of the spacer 78 are sequentially communicated and communicate with the tank intake passage 64. A throttle valve 92 is provided in the body intake passage 88.

In FIG. 4, reference numeral 94 denotes a spark plug, and reference numeral 96 denotes a branch exhaust passage communicating with each exhaust port 38. The branch exhaust passage 96 communicates with the collective exhaust passage 98 and is discharged by an exhaust pipe (not shown).

The engine 14 has a breather chamber 100 in a head cover 34 as shown in FIGS. The blow-by gas, which is unburned gas leaked into the crank chamber 102 in the crank case 24, is guided to the breather chamber 100. The breather chamber 100 is provided with a blow-by gas extraction pipe 104.

As shown in FIGS. 3 to 5, the engine 14 separates unburned vapor gas on the other side of the outboard motor 2 opposite to the intake manifold 58 in a direction intersecting the traveling direction of the outboard motor 2. A vapor separator 106 is provided. The vapor separator 106 includes a float 108 and a filter 1.
10 are built in, and a vapor gas extraction pipe 112 is provided.

As shown in FIGS. 1 and 2, the throttle guide 82 has a blow-by gas intake pipe 114 for blow-by gas which is unburned gas generated by the engine 14.
A vapor gas intake pipe 116 for vapor gas that is unburned gas is provided. The blow-by gas intake pipe 114 and the vapor gas intake pipe 116 are provided on the upper wall of the throttle guide 82 so as to be directed substantially vertically downward so as to be substantially orthogonal to the guide intake passage 86, respectively.

The blow-by gas inlet pipe 114 is connected to the blow-by gas outlet pipe 104 of the breather chamber 100 by a blow-by gas supply pipe 118. Thus, a blow-by gas supply pipe 118 is provided on the upper wall of the throttle guide 82 so as to be directed downward substantially vertically so as to be substantially orthogonal to the guide intake passage 86 and communicate with the blow-by gas supply pipe 118. Gas passage 12
0 communicates the breather chamber 100. The blow-by gas supply pipe 118 is piped so as to be inclined downward from the breather chamber 100 toward the throttle guide 82.

The vapor gas inlet pipe 116 is connected to a vapor gas outlet pipe 112 of the vapor separator 106 by a vapor gas supply pipe 122. Accordingly, a vapor gas supply pipe 122 is attached and provided on the upper wall of the throttle guide 82 so as to be directed substantially downward in the vertical direction so as to be substantially orthogonal to the guide intake path 86, and the vapor gas passage 124 of the vapor gas supply pipe 122 is provided. Communicates the vapor separator 106. The vapor gas supply pipe 122 is formed so as to be inclined downward from the vapor separator 106 toward the throttle guide 82.

The throttle guide 82 is provided with a mounting boss 126 facing the guide intake passage 86. The mounting boss 126 is provided with an intake air temperature sensor 128 for detecting the intake air temperature facing the guide intake passage 86. That is, the throttle guide 82
As shown in FIG. 1, the tip of an intake air temperature sensor 128 that corrects the fuel injection amount based on the intake air temperature faces the guide intake passage 86, and is mounted at a position outside the mounting positions of the blow-by gas supply pipe 118 and the vapor gas supply pipe 122. Provided. The intake air temperature sensor 128 is connected to the control unit 130. The control unit 130 calculates the fuel injection amount based on the operation state detected by various sensors (not shown), corrects the fuel injection amount based on the intake air temperature detected by the intake air temperature sensor 128, and controls the operation of the fuel injection valve 72. I do.

Next, the operation will be described.

When the engine 14 of the outboard motor 2 is operating, the intake air taken into the surge tank 60 of the intake manifold 58 from the throttle guide 82 via the throttle body 80 is distributed to each branch pipe 62 and the fuel injection valve 72 is provided. Is sucked into the cylinder 26 from the intake port 36 as an air-fuel mixture together with the fuel injected by the cylinder. The air-fuel mixture in the cylinder 26 is ignited by a spark plug 94 and burned, and the exhaust gas 38
Is more exhausted.

The engine 14 includes an intake manifold 58
Upstream of the surge tank 60 and the crankcase 2
A single throttle body 80 having a throttle valve 92 is provided at a position forward of the throttle body 4. A cylindrical throttle guide 82 is further upstream of the throttle body 80, and a guide intake passage 86 is connected to the body of the throttle body. The outboard motor 2 is disposed substantially horizontally so as to be directed toward the other side of the outboard motor 2 in a state of being coaxial with the intake passage 88. Since the function of the throttle guide 82 is to guide intake air to the throttle body 80, no mechanical strength is required.

For this reason, the throttle guide 82 is formed of a flexible or elastic material such as rubber or synthetic resin which is hardly affected by vibration propagation or thermal influence from the engine 2.

When the engine 14 is operating, the unburned gas blow-by gas introduced into the breather chamber 100 of the head cover 34 is supplied to the guide intake passage 86 of the throttle guide 82 through the blow-by gas passage 120 of the blow-by gas supply pipe 118. Is done. When the engine 14 is operating, the vapor gas, which is the unburned gas of the vapor separator 106, is supplied to the guide intake passage 86 of the throttle guide 82 through the vapor gas passage 124 of the vapor gas supply pipe 122.

The unburned blow-by gas and vapor gas supplied to the guide intake passage 86 by the blow-by gas supply pipe 118 and the vapor gas supply pipe 122 are:
By being provided in communication with the guide intake passage 86 in which the intake of the throttle guide 82 flows quickly without stagnation,
Unburned gas can be sufficiently recovered.

The blow-by gas supply pipe 118 and the vapor gas supply pipe 122 are attached to the upper wall of the throttle guide 82 so as to be directed substantially vertically downward so as to be substantially perpendicular to the guide intake passage 86, and communicate with the blow-by gas. Passage 1
20 and the vapor gas passage 122 are provided so as to communicate with each other, and furthermore, the blow-by gas supply pipe 118 is piped so as to be inclined downward from the breather chamber 100 toward the throttle guide 82, and the vapor gas supply pipe 122 is connected to the vapor separator 106. The pipe is formed so as to be inclined downward toward the throttle guide 82 so that even if the blow-by gas or the vapor gas is liquefied, it does not accumulate.

Therefore, even if the blow-by gas or the vapor gas generated in the engine 14 is liquefied, the passages are not clogged, and these gases can be satisfactorily collected in the intake system.

When the engine 14 is operating, the intake air temperature sensor 128 inputs the intake air temperature to the control unit 130.
The control unit 130 calculates the fuel injection amount based on the operation state detected by various sensors (not shown), corrects the fuel injection amount based on the intake air temperature detected by the intake air temperature sensor 128, and controls the operation of the fuel injection valve 72. I do.

The intake air temperature sensor 128 is provided with a throttle guide 82 made of a material having flexibility and elasticity.
Guide intake passage 86 in which intake air flows quickly without stagnation
To the engine 14 without being affected by the temperature of the blow-by gas and the vapor gas, by being provided at a position deviating from the mounting position of the blow-by gas supply pipe 118 and the vapor gas supply pipe 122. The temperature of the intake air flowing without stagnation can be detected. In addition, the intake air temperature sensor 128 is hardly affected by vibration propagation or thermal influence from the engine 14 by being provided by being attached to the throttle guide 82 formed of a flexible or elastic material.

Therefore, the intake air temperature sensor 128 can be mounted without taking measures against vibrations or heat, and the intake air temperature sensor 128 can accurately detect the intake air temperature. Thereby, the control unit 130 can appropriately correct the intake air temperature of the fuel injection amount by the fuel injection valve 72.

[0039]

As described above in detail, according to the present invention, one side of the engine mounted on the outboard motor extends from the front to the rear along both the engine side surface and the engine cover inner surface on one side of the engine. An intake manifold consisting of a plurality of branch pipes is provided, and on the other side of the outboard motor, on the upstream side of the surge tank of the intake manifold and further upstream of the throttle body provided at a position ahead of the crankcase. Since the function of the cylindrical throttle guide that is oriented substantially horizontally is to guide intake air to the throttle body, no mechanical strength is required. For this reason, the throttle guide is formed of a material having flexibility and elasticity, and can be hardly affected by vibration propagation and thermal influence from the engine.

Further, the blow-by gas supply pipe or the vapor gas supply pipe is mounted on the upper wall of the throttle guide so as to be directed substantially vertically downward so as to be substantially perpendicular to the guide intake passage so that the intake of the throttle guide can be quickly performed without stagnation. By being provided in communication with the flowing guide intake passage, blow-by gas and vapor gas, which are unburned gases, can be sufficiently collected. In addition, the blow-by gas supply pipe and the vapor gas supply pipe are provided on the upper wall of the throttle guide so as to be directed substantially vertically downward so as to be substantially orthogonal to the guide intake passage, so that the blow-by gas and the vapor gas are supplied. It does not accumulate when liquefied. For this reason, even if the blow-by gas and the vapor gas generated in the engine are liquefied, the blow-by gas and the vapor gas can be satisfactorily collected in the intake system without clogging.

Further, the intake air temperature sensor has a front end facing a guide intake passage in which the intake of a throttle guide formed of a flexible or elastic material flows quickly without stagnation, and a blow-by gas supply pipe and a vapor gas supply pipe. The temperature of the intake air flowing toward the engine can be detected by being provided at a position deviated from the mounting position. In addition, the intake air temperature sensor is attached to a throttle guide formed of a material having flexibility and elasticity, so that it is less susceptible to vibration propagation and thermal influence from the engine. For this reason, the intake air temperature sensor can be installed without the need for anti-vibration measures and thermal measures, and the intake air temperature sensor can accurately detect the intake air temperature, and correct the intake air temperature correction of the fuel injection amount by the fuel injection valve. Can be made.

[Brief description of the drawings]

FIG. 1 is a partially broken front view of an engine of an outboard motor showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the engine.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 6;

FIG. 5 is an enlarged sectional view taken along line VV in FIG. 6;

FIG. 6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a side view of the outboard motor.

FIG. 8 is a rear view of the outboard motor.

FIG. 9 is an exploded perspective view of an engine of an outboard motor showing a conventional example.

[Explanation of symbols]

 2 Outboard motor 14 Engine 20 Cylinder block 32 Cylinder head 34 Head cover 36 Intake port 38 Exhaust port 48 Camshaft 58 Intake manifold 60 Surge tank 62 Branch pipe 64 Tank intake passage 66 Branch intake passage 72 Fuel injection valve 76 Fuel distribution pipe 78 Spacer Reference Signs List 80 throttle body 82 throttle guide 84 filter 86 guide intake passage 88 body intake passage 90 spacer intake passage 92 throttle valve 100 breather chamber 102 crank chamber 106 vapor separator 118 blow-by gas supply pipe 120 blow-by gas passage 122 vapor gas supply pipe 124 vapor gas passage 128 intake Temperature sensor 130 control unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI F02M 25/08 F02M 35/16 Z 35/16 B63H 21/26 Z (72) Inventor Nobuyuki Shomura 300 No. Takatsukacho, Hamamatsu City, Shizuoka Prefecture Inside Suzuki Co., Ltd. (72) Inventor Hidehiko Yoshioka 300, Takatsukacho, Hamamatsu-shi, Shizuoka Suzuki Co., Ltd. (72) Inventor Jiro Saiga 300, Takatsuka-cho, Hamamatsu-shi, Shizuoka Suzuki Co., Ltd. (56) Reference Document JP-A-2-201050 (JP, A) JP-A-60-11616 (JP, A) JP-A-2-67414 (JP, A) JP-A-4-47116 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F02M 35/10 F02M 35/10 311 B63H 20/00 F01M 13/00 F02D 35/00 360 F02M 25/08 F02M 35/16

Claims (2)

(57) [Claims] 1. An engine cover and an undercover for an outboard motor.
In the traveling direction.
Arrange the base, cylinder block and cylinder head
With the crankshaft almost perpendicular to the cylinder block
Engine which is supported by a crankcase
And the engine intersects the direction of travel of the outboard motor.
To the front of the crankcase on one side in the direction
Surge tank and an engine that branches off from the surge tank.
From the front along both the gin side and the inside of the engine cover
Extends rearward and is provided on one side of the cylinder head
Intake consisting of multiple branch pipes communicating with each intake port
A manifold is provided, and the manifold of each branch pipe of the intake manifold is provided.
4 equipped with a fuel injection valve near the cylinder head
In an outboard motor equipped with a cycle engine, the clutch is located upstream of a surge tank of the intake manifold.
Equipped with a throttle valve in front of the link case.
A single throttle body is provided, and the throttle body has a body intake passage substantially similar to a branch intake passage of each of the branch pipes.
Orientated to the other side of the outboard motor in a state where it is orthogonal and substantially horizontal
And an engine upstream of the throttle body .
Flexible and elastic that are not easily affected by vibration propagation or thermal effects
That the throttle guide forming a cylindrical shape provided by the material, the throttle guide the guide intake passage Bode
Directed to the other side of the outboard motor while coaxial with the intake passage
And placed almost horizontally, the blow generated by the engine
Blow-by gas supply pipe or ba
The vapor gas <br/> scan feed pipe, said by directed substantially vertical line downward to guide the intake passage substantially perpendicular to the upper wall of the throttle guide mounting for recovering vapor gas generated in the vapor separator
Only throttle guide of the outboard motor, characterized in that provided in communication. 2. An outboard motor engine cover and undercover.
In the traveling direction.
Arrange the base, cylinder block and cylinder head
With the crankshaft almost perpendicular to the cylinder block
Engine which is supported by a crankcase
And the engine intersects the direction of travel of the outboard motor.
To the front of the crankcase on one side in the direction
And Sir Jitanku was, ene is branched from the surge tank
From the front along both the gin side and the inside of the engine cover
Extends rearward and is provided on one side of the cylinder head
Intake consisting of multiple branch pipes communicating with each intake port
A manifold is provided, and the manifold of each branch pipe of the intake manifold is provided.
4 equipped with a fuel injection valve near the cylinder head
In an outboard motor equipped with a cycle engine, the clutch is located upstream of a surge tank of the intake manifold.
Equipped with a throttle valve in front of the link case.
A single throttle body is provided, and the throttle body has a body intake passage substantially similar to a branch intake passage of each of the branch pipes.
Orientated to the other side of the outboard motor in a state where it is orthogonal and substantially horizontal
And an engine upstream of the throttle body .
Flexible and elastic that are not easily affected by vibration propagation or thermal effects
That the throttle guide forming a cylindrical shape provided by the material, the throttle guide the guide intake passage Bode
Directed to the other side of the outboard motor while coaxial with the intake passage
And placed almost horizontally, the blow generated by the engine
Blow-by gas supply pipe or ba
The vapor gas <br/> scan feed pipe, said by directed substantially vertical line downward to guide the intake passage substantially perpendicular to the upper wall of the throttle guide mounting for recovering vapor gas generated in the vapor separator
The throttle guide is provided with a tip of an intake air temperature sensor for correcting the fuel injection amount based on the intake air temperature.
An end facing the guide intake passage and the blow-by gas
The position where the supply pipe and vapor gas supply pipe are out of the mounting position
A throttle guide for an outboard motor, wherein the throttle guide is mounted on an outboard motor.