JP3051106B2 - Outboard motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-cylinder injection type engine for an outboard motor, and more particularly to a waterproof structure for such an engine.

[0002]

2. Description of the Related Art In general, in a two-cycle engine, there is an in-cylinder injection engine in which fuel is injected directly into a combustion chamber of an engine together with pressurized air in order to solve problems such as irregular combustion and blow-through of fresh air. May be used as an outboard engine. Here, as an accessory in the direct injection engine, an air compressor for obtaining the pressurized air, an AC generator for supplementing a drive power supply for a fuel injector and other electric components and charging a battery, and the like are starter motors. Attached to the upper part of the engine body together with a flywheel magneto and the like, these members are interlocked with each other via a transmission mechanism such as a belt.

[0003]

The engine is covered with a cowling. However, since the water such as seawater enters the cowling, it is necessary to protect the above-mentioned members attached particularly to the upper part of the engine body from water. There is.
However, in the related art, a cover is attached to the flywheel magneto, but at present, other accessories and starter motors are not protected at all in the cowling.

[0004] The present invention has been made in view of such prior art, and its object is to prevent various accessories and the like provided on the upper part of the engine main body from entering water.
An object of the present invention is to provide an outboard motor that ensures smooth operation of these devices.

It is another object of the present invention to suppress an increase in the number of parts and to simplify the structure.

[0006]

The outboard motor according to the present invention has the following features.
To achieve the purpose, the club covered with cowling (42)
Engine body (10) with the crankshaft installed vertically and the crankshaft (1
2) with a disk-shaped rotating body (14) attached to the upper part of
In the outboard motor, the rotational force of the crankshaft (14)
To be driven, the upper part of the engine body (10)
Each is arranged so as to be located outside the outer periphery of the rotating body.
The first and second driven members (24, 46) and the rotating body
(14) and the first and second driven
Pulleys provided on the members (24, 46),
Disposed between each pulley of the first and second driven members (24, 46);
Belt that interlocks with the idler pulley (50)
(48), the rotating body (14), and the first and second driven bodies.
A member (24, 46), and the first and second driven members (24, 46);
Each pulley, the idler pulley (50), and the belt
(48) from above the engine body (10).
A water cover (52).

Further, a star for rotatingly driving the rotating body (14).
The motor (44) is further provided above the engine body (10).
The waterproof cover (52) is integrated with the starter motor (44).
Can be covered. For example, the rotating body is
And the first and second driven
The members (24, 46) are air compressor and AC power generation respectively.
Machine .

Thus, flywheel magnetos and the like
Equipment is covered by one waterproof cover
Each device with a different cover.
The number of parts is smaller than when
Increase can be suppressed, and
Mixing water into the pressurized air of the Lesa, alternator or star
Water from moving parts such as
Can be stopped .

Further, according to the present invention, the driven member and the rotating device are arranged around the engine in a well-balanced manner.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments shown in the drawings.

FIGS. 1 and 2 show a two-stroke V-type six-cylinder in-cylinder injection type engine for an outboard motor to which the present invention is applied. A crankshaft 12 is vertically disposed on the engine body denoted by reference numeral 10, and a flywheel magneto 1 protruding from the engine body 10 above the crankshaft 12.
4 is attached. This flywheel magnet 14
Pulley 14 for taking out the rotational force of crankshaft 12
a is formed (see FIG. 1) . This crankshaft 12
Then, pistons (not shown) arranged horizontally are connected via connecting rods (not shown), and each piston is housed in a cylinder 16 arranged in a V-shape and three in each of two banks. In particular, as shown in FIG. 2, an injector 18 is provided at the head of each cylinder 16, and fuel from a fuel pump (not shown) is supplied to the injector 18 via a water separator 20 and a fuel pump 22. Pressurized air is supplied from the air compressor 24. 2
Reference numeral 6 denotes a damper for controlling fuel pulsation.

In FIG. 1, reference numeral 28 denotes an intake passage, and the intake passage 28 is arranged in a substantially U-shape as a whole in a plane perpendicular to the longitudinal axis of the engine body 10. An intake silencer 30 is disposed at an upper end of the substantially U-shaped intake passage 28 at a position adjacent to the flywheel magneto 14. 32 is the intake silencer 3
0 air inlet. 34 is the intake passage 2
A throttle sensor 36 for detecting the opening of a throttle valve (not shown) provided upstream of 8, and a control lever 36 which is linked to an oil pump (not shown) via a link 37. A cover 38 is further attached to the front surface of the substantially U-shaped intake passage 28, and a device for controlling the engine is housed in the cover 38. The entire engine body 10 thus configured is covered with a bottom cowl 40 and a top cowl 42 detachably attached to the bottom cowl 40.

As shown in FIG. 2, the air compressor 24 is provided with a flywheel magnet on the upper part of the engine body 10.
It is arranged outside the unit 14 . This air compressor 2
In addition to the 4, the upper portion of the engine body 10, the starter motor 44 and the AC generator 46, for driving the at startup What the flywheel magneto 14 gear 44a is intermesh <br/> link gear arrangement Is done. Here, the pulley 46a of the AC generator 46, the fly-wheel magneto 14
Pulley 14a , the pulley 2 of the air compressor 24
4a is wrapping connector coupled by a belt 48 through the idler pulley 50, crankshaft 12
These accessories are driven by the rotation of. The tension of the belt 48 is adjusted by the movement of the AC generator 46.

A flywheel magneto 14, an air compressor 24 and a pulley 24a , which are auxiliary components of these engines and are installed on the upper part of the engine body 10,
Starter motor 44 and pulley 44a , AC generator 46
The pulley 46a , the belt 48, and the idler pulley 50 are covered by one integral waterproof cover 52. The waterproof cover 52 is fixed at one end thereof to a side surface of the intake silencer 30 via a mounting pin 54, and is also fixed to the engine body 10 via brackets 56 at substantially two other symmetrical positions.

With the above configuration, the above-mentioned plurality of accessories, such as the flywheel magneto 14 and the like, disposed on the upper part of the engine body 10 , the pulley, and the belt are covered by one integral waterproof cover 52. , Water can be prevented from entering these accessories , pulleys and belts , and smooth operation of these accessories can be ensured. Compared with a case where these accessories are separately covered with a cover, the structure is simpler and the number of parts is reduced, so that an increase in cost can be prevented.

The waterproof cover 52 is made of a material as rigid as possible, for example, FRP.

[0017]

As described above, according to the present invention,
Auxiliary equipment , pulleys, and belts installed on the upper part of the engine body are configured to be covered by a single cover, so that even if water enters the cowling, water will be applied to these auxiliary equipments. The outboard motor can be provided in a state where it can be effectively prevented from intruding, the number of parts is suppressed from increasing, and the structure is simplified.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a waterproof structure of an in-cylinder injection engine for an outboard motor according to the present invention.

FIG. 2 is a plan view in a state where a waterproof cover of FIG. 1 is removed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Engine body 14 ... Flywheel magneto 24 ... Air compressor 44 ... Starter motor 46 ... Alternator 48 ... Belt 52 ... Waterproof cover

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F02B 67/00 F02B 67/06 F02B 77/00 B63H 21/26

Claims (3)

(57) [Claims] 1. A vertically mounted crankshaft covered with a cowling.
Mounted on the engine body and above the crankshaft
An outboard motor including a disc-shaped rotating body , wherein the outboard motor is driven by a rotational force of the crankshaft.
At the top of the engine body and outside the outer periphery of the rotating body
First and second driven, respectively arranged to be placed
A member, a pulley that rotates integrally with the crankshaft ,
And each pulley provided on the second driven member
Disposed between each pulley of the first and second driven members
Belt that links the idler pulley with
And the rotator, the first and second driven members,
A pulley for each of the first and second driven members;
Pull the pulley and the belt together from above the engine body.
An outboard motor comprising: a waterproof cover that physically covers ; 2. A starter motor for driving said rotating body to rotate.
Is further provided on the upper part of the engine body, and the waterproof cover is
The outboard of claim 1, wherein the starter motor is also covered integrally.
Machine . 3. The rotating body is a flywheel magnet.
And the first and second driven members are air
The outboard of claim 2, wherein the outboard is a compresor and an alternator.
Machine .