JP2000318684A - Outboard engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent to the utmost an injector from being splashed with water drop or the like. SOLUTION: A fuel injection type engine wherein fuel is injected by an injector is arranged inside a cowling 1 of an outboard engine. The fuel is supplied to the injector via a fuel rail 25. A cover 51 provided with a clamp part 56 for clamping the fuel rail 25 is attached detachably to the fuel rail 25 by the clamp part 56 to cover an upper part and a side part of the injector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outboard motor having an engine disposed in a cowling.

[0002]

2. Description of the Related Art Conventionally, an engine is arranged in a cowling of an outboard motor. The use of a fuel injection type engine has recently been considered, and fuel is supplied to the engine by an injector.

[0003]

By the way, water droplets such as salt water have penetrated into the cowling of the outboard motor, and the water droplets may hit the injector or the like. Therefore, the durability of the injector may be reduced. Further, when the upper cowling is attached or detached, the cord of the ignition coil may be caught on the engaging hook or the like of the upper cowling. Furthermore, the cord of the ignition coil, through which high-voltage current flows, approaches the injector and fuel rail,
The current may leak.

An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide an outboard motor capable of minimizing the possibility of water drops or the like being applied to an injector.

[0005]

In the outboard motor according to the present invention, a fuel injection engine (9) in which fuel is injected by an injector (23) is disposed in a cowling (1, 2). Further, a cover (51) for covering the upper side and the side of the injector is provided.

Further, fuel is supplied to the injector via a fuel rail (25), and the cover is provided with a holding portion (56) for holding the fuel rail. May be detachably attached to the fuel rail.

Further, an ignition coil (3) is provided on the cover.
In some cases, a holding portion (57) for holding the cord (39) of 8) is provided, and the cord of the ignition coil is held by the holding portion and wired inside the cover.

The engine is provided with a cylinder (1
1) is a V-type engine which is arranged so as to be V-shaped in the left-right direction, wherein injectors are provided for each of the left and right cylinders, two covers are provided, and the left cover is the left injector. The right cover may cover the right injector.

In an outboard motor in which an engine, an engine control unit (31) and electrical components are arranged in a cowling, a tube (33) extending in a vertical direction is provided in the cowling, and the engine control is provided. The electrical component cord (36) led out from the lower part of the unit passes from the lower end of the tube, passes through the inside of the tube, is led out of the upper end of the tube, passes above the engine, and then hangs down from above the engine. It is connected to the electrical component.

[0010]

Next, an embodiment of an outboard motor according to the present invention will be described with reference to FIGS. FIG. 1 is a side view of an outboard motor according to the present invention. FIG. 2 is a partially cutaway plan view of the inside of the outboard motor. FIG. 3 is a perspective view of the inside of the cowling. FIG. 4 is a front view of the cover, and FIG.
FIG. 5A and 5B are explanatory diagrams of the cover, wherein FIG. 5A is a plan view, FIG. 5B is a view as viewed from the arrow b in FIG. 5A, and FIG. 5C is a bottom view. FIG. 6 is a side view of the cover, and is a view taken in the direction of arrow VI in FIG. FIG. 7 is a rear view of the cover, and is a view taken in the direction of arrow VII in FIG. FIG. 8 is a front view of the injector control unit viewed from the rear of the outboard motor. FIG. 9 is a front view of the engine control unit viewed from the rear of the outboard motor. In FIG. 2, the starboard side cover is illustrated by a solid line, and the port side cover is illustrated by a two-dot chain line. In FIG. 3, the starboard side cover is not attached to the fuel rail, and the port side cover is attached to the fuel rail. In FIG. 7, the upper wall 52 and the eaves 54 of the cover 51 are hatched for easy understanding.

As shown in FIG. 1, the outboard motor is covered by a housing consisting of an upper cowling 1, a lower cowling 2, an upper casing 3 and a lower casing 4 in order from the upper side. A mounting bracket 6 for mounting the outboard motor to a small boat is mounted and fixed to a transom 7 of the small boat. An outboard motor main body is rotatably attached to a rear portion of the mounting bracket 6 via a pivot shaft or the like. FIG.
As shown in FIG. 1, a two-stroke engine 9 of a direct in-cylinder injection V-type six cylinder is arranged inside cowlings 1 and 2 including an upper cowling 1 and a lower cowling 2. The rotation of the crankshaft 10 of the engine 9 is transmitted to a propeller 12 rotatably provided at a rear end of the lower casing 4 via a drive shaft, a bevel gear, a propeller shaft, and the like.

The crankshaft 10 of the engine 9 has its axis provided substantially vertically, and a pair of left and right cylinders 11 are arranged behind the crankshaft 10 in a V-shape in the left-right direction. I have. The pair of left and right cylinders 11 is provided in three stages in the vertical direction, and the cylinders 11 are arranged in a total of six cylinders. Also, six pistons 13 are connected to the connecting rods 14 on the crankshaft 10.
The piston 13 is slidably disposed inside each cylinder 11. The case 17 of the engine 9 includes a cylinder block 20 forming the above-described six cylinders 11 and a cylinder block 20.
Crankcase 21 that covers the side of the crankshaft 10
And a pair of left and right cylinder heads 22 that cover and close the combustion chamber 11a side of the cylinder block 20.

The cylinder head 22 is provided with a solenoid openable / closable injector 23 and a spark plug 24. The spark plug 24 is disposed outside the injector 23. Then, the fuel pump sucks fuel such as gasoline from the fuel tank, pressurizes the fuel, and supplies the fuel to the injector 23 via a column-shaped fuel rail 25 extending substantially vertically. When the solenoid of the injector 23 operates, the fuel from the injector 23 to the combustion chamber 11a
Injecting fuel into.

[0014] Between the left and right cylinder heads 22, FIG.
An engine control unit 31 shown in FIG. 8 is arranged, and an injector control unit 32 shown in FIG. 8 is arranged behind the engine control unit 31. Injector control unit 3
A tube 33 is provided at the rear of the engine control unit 31 so as to extend in the up-down direction. An electrical component code 36 (for example, a sensor code, a relay code, and a remote control code) extending from a lower portion of the engine control unit 31 is provided. , Is inserted from the lower end opening of the tube 33, taken out from the upper end of the tube 33, is divided right and left as shown by the arrow in FIG. Then, it hangs down from above the engine 9 and is led to various electric components arranged below the cowlings 1 and 2. Therefore, it is possible to prevent the cord 36 from coming into contact with water or the like accumulated under the cowlings 1 and 2. Also, if the cord 36 is passed through the gap between the parts or the back of the part as in the conventional case, the work at the time of repair or maintenance becomes difficult. However, in this embodiment, the work at the time of repair or maintenance is difficult. Easy.

The injector control unit 32 is provided with six ignition coils 38. A cord 39 extends from the ignition coil 38,
The cap 41 at the end of the cord 39 is
It is connected to the.

A pair of left and right covers 51 are provided to cover the injector 23 and the fuel rail 25 from the cowling 1 and 2 sides. This cover 51 is shown in FIGS. 4 to 7 and includes the injector 23 and the fuel rail 25.
An upper wall 52 that covers the upper side of the upper surface, a side wall 53 that has a substantially U-shaped cross section that covers the side, an eave 54 provided on the inner surface of the side wall 53, and a holding portion that holds the fuel rail 25. And an engagement claw 56. The eaves 54 are provided for each of the injectors 23 and cover the upper side, the side, and the lower side of the injector 23. Further, a pair of upper and lower engaging claws 56 is provided, and the fuel rail 25 is sandwiched between the engaging claws 56 so that the cover 51 is detachably attached to the fuel rail 25. Further, cuts 57 as holding portions for holding the cords 39 are provided on both sides of the side wall 53 of the cover 51, and the cords 39 of the ignition coil 38 are fitted and held in the cuts 57. . When the cover 51 is attached to the fuel rail 25, the cord 39 is wired inside the cover 51, and the cord 39 and the fuel rail 25 have an interval.

The upper cowling 1 is shown in FIGS.
Are detachably attached to the lower cowling 2 by a front hook 61 and left and right rear hooks 62 shown in FIG. Since the cord 39 is wired inside the cover 51, the rear hook 62 can be prevented from being hooked on the cord 39 when the upper cowling 1 is attached or detached.

As described above, in the embodiment, the cover 51 covers the injector 23 and the fuel rail 25 from above and from the side of the cowlings 1 and 2.
The attachment and detachment becomes easier as compared with the case where the cover is provided from all sides.

The fuel rail 25 and the injectors 23 are covered with a cover 51 having an upper wall 52 and a side wall 53, and each injector 23 is covered with an eave 54 provided inside the cover 51. Therefore, the injector 23 is double-covered, and it is possible to prevent water droplets and the like from adhering to the injector 23 as much as possible.

In order to stably attach the upper cowling 1 to the lower cowling 2, it is preferable that the rear portion of the upper cowling 1 is attached to the lower cowling 2 with left and right rear hooks 62. When the engine 9 is a V-type engine, the cord 39 of the ignition coil 38 is wired near the position of the rear hook 62. Therefore, when the cord 39 is exposed, the rear hook 62 is easily hooked on the cord 39. However, in this embodiment, the cord 39 is wired through the inside of the cover 51,
The rear hook 62 can be prevented from being hooked on the cord 39.

The embodiment of the present invention has been described above in detail.
The present invention is not limited to the above embodiment,
Within the gist of the present invention described in the claims,
Various changes can be made. Modification examples of the present invention are exemplified below. (1) In the above embodiment, the engine 9 is a two-cycle engine, but may be a four-cycle engine. Although the engine 9 is a V-type six cylinder, the number and type of the cylinders can be changed as appropriate.

(2) The positional relationship between the left and right members can be reversed. (3) The holding portion for holding the code is constituted by the cutout 57, but other structures are also possible. However, if it is formed with cuts, it can be formed simply and inexpensively. (4) The holding portion for holding the fuel rail 25 is provided with an engagement claw 56.
However, other structures are also possible. (5) As long as the cover 51 can cover at least the upper side and the side of the injector 23, its shape and structure can be appropriately changed.

[0023]

According to the present invention, since the injector in the cowling is covered with the cover on the upper side and the side, even if water drops enter the cowling, the water drops adhere to the injector. Can be prevented as much as possible. As a result, the durability of the injector is improved.
In addition, it is possible to reduce the leakage of the operation sound of the injector to the outside.

In the case where the cover is a holding portion and is detachably attached to the fuel rail, a cover for covering the injector can be attached using the fuel rail. In addition, the cover can be easily attached and detached, and there is no need to perform special processing on the fuel rail.

Further, when the cord of the ignition coil is held by the holding portion of the cover and wired inside the cover, it is possible to prevent the hook of the cowling from being hooked on the cord. Moreover, the cord is held by the holding portion, so that the cord of the ignition coil can be prevented from coming into contact with the fuel rail or the injector.
As a result, it is possible to prevent a high voltage current flowing through the cord of the ignition coil from leaking to the fuel rail and the injector as much as possible.

When the left and right injectors of the V-type engine are covered with left and right covers, it is possible to prevent the left and right rear hooks of the upper cowling from being caught on the cord of the ignition coil. As a result, the cowling can be made compact.

Further, the electrical component cord led out from the lower part of the engine control unit is led out from the lower end part of the tube, through the inside of the tube, from the upper end part of the tube, passes above the engine, and then passes through the engine. It hangs down from above and is connected to the electrical component. Therefore, even if water is applied to the engine control unit from above, water will enter the engine control unit from the lead-out portion of the electrical component code as compared to the case where the electrical component code is derived from the top of the engine control unit. Less to do. In addition, despite the fact that the electrical component cord is led out from the lower part of the engine control unit, the electrical component cord is connected to the electrical component through the upper part of the engine, so that water collected at the lower part of the cowling, etc. And the occurrence of non-conduction due to corrosion of electrical component cords and the like is reduced. Further, since the electrical component cord is covered with the tube, it is possible to prevent the other components from being damaged by contact with other members as much as possible.

[Brief description of the drawings]

FIG. 1 is a side view of an outboard motor according to the present invention.

FIG. 2 is a partially cutaway plan view of the inside of the outboard motor.

FIG. 3 is a perspective view of the inside of a cowling.

FIG. 4 is a front view of the cover, and is a view taken in the direction of arrow IV in FIG. 5 (a).

FIG. 5 is an explanatory view of a cover, wherein (a) is a plan view,
(B) is a view on arrow b of (a), and (c) is a bottom view.

FIG. 6 is a side view of the cover, and is a view taken in the direction of arrow VI in FIG. 5 (a).

FIG. 7 is a rear view of the cover, and is a view taken in the direction of arrow VII in FIG. 5 (a).

FIG. 8 is a front view of the injector control unit as viewed from the rear of the outboard motor.

FIG. 9 is a front view of the engine control unit as viewed from the rear of the outboard motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper cowling 2 Lower cowling 9 Engine 11 Cylinder 23 Injector 25 Fuel rail 31 Engine control unit 33 Tube 36 Electrical component cord 38 Ignition coil 39 Ignition coil cord 51 Cover 56 Engagement claw (holding part) 57 Part)

Claims (5)

[Claims] 1. An outboard motor arranged in a cowling of a fuel injection engine in which fuel is injected by an injector, wherein a cover is provided to cover an upper side and a side of the injector. Outboard motor. 2. The fuel is supplied to the injector via a fuel rail, and the cover is provided with a holding portion for holding the fuel rail, and the cover is detachably attached to the fuel rail by the holding portion. The outboard motor according to claim 1, wherein the outboard motor is attached to the outboard motor. 3. The cover is provided with a holding portion for holding an ignition coil cord, and the ignition coil cord is held by the holding portion and wired inside the cover. Item 3. The outboard motor according to item 1 or 2. 4. The engine is a V-type engine in which cylinders are arranged so as to be V-shaped in the left-right direction, an injector is provided for each of left and right cylinders, and two covers are provided. 4. The outboard motor according to claim 1, wherein the left cover covers the left injector and the right cover covers the right injector. 5. An outboard motor in which an engine, an engine control unit, and electrical components are arranged in a cowling, wherein a tube extending in a vertical direction is provided in the cowling, and is drawn out from a lower portion of the engine control unit. The electrical component cord is drawn from the lower end portion of the tube, through the inside of the tube, from the upper end portion of the tube, passes over the engine, and then hangs down from above the engine and is connected to the electrical component. Outboard motor characterized by the following.