JPH0849557A - Outboard engine - Google Patents

Abstract

PURPOSE:To reasonably arrange various auxiliary machines and parts on the peripheral side face with no interference among them. CONSTITUTION:A crankshaft 11 and a cam shaft 36 are vertically arranged in a main body case 2 fitted to a hull via brackets 42, 43, an engine cover 3 removably fitted above the main body case 2, and an engine room 4. An engine room 28 is arranged on the rear of an engine 5, and a crank room 22 is arranged on the front. An intake system connected with a carburetor 30 and an air intake pipe 29 to an intake passage is extended and arranged on one side. Exhaust passages 32 are vertically arranged on the other side, an oil filter 40 is arranged at the front position, and a starter motor 34 is arranged on the front side of the engine 5. Electric connecting parts 47, 48 are arranged at the engine side face portion 41a except for the layout portion of the oil filter 40 above the junction of the main body case and the engine cover 3 between the exhaust passages 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outboard motor detachably attached to a stern for propulsion of a ship.

[0002]

2. Description of the Related Art Such an outboard motor is arranged in a casing attached to a hull via a bracket, an engine cover which is detachably attached to an upper surface of the casing, and an engine room defined by the casing and the engine cover. And a drive shaft connected to the output shaft of the engine vertically in the vertical direction. A propeller is provided on a propeller shaft that passes through and is connected to the lower end thereof in the front-rear direction.

Therefore, as the engine for the outboard motor, a vertical type engine in which the crankshaft is arranged in the vertical direction is adopted, and in the case of a multi-cylinder engine, the center line of each cylinder is oriented horizontally in the front-rear direction. It has been practiced to arrange these cylinders vertically (for example, see Japanese Utility Model Publication 57-31934).
issue).

With the recent increase in size of engines for outboard motors,
Although a relatively large oil filter is provided, this oil filter is a cylinder block so that the engine as a whole is roughly oval when viewed from above and has a shape suitable for an outboard engine to be housed in the casing. Is projected on the side surface (for example, Japanese Patent Laid-Open No. 60-27662).

[0005]

By the way, in an outboard motor engine, not only an oil filter but also various accessories and parts are provided on the side surface of the engine and have a shape suitable for housing the engine in a casing. In particular, it is desirable to rationally arrange other auxiliary machines and parts while avoiding interference with a carburetor that occupies a relatively large space on one side of the engine.

Therefore, the present invention intends to provide an outboard motor having a rational auxiliary equipment and parts arranged to solve such a problem.

[0007]

For this reason, in the present invention, the main body case attached to the hull via the bracket, the engine cover detachably attached to the upper surface of the main body case, the main body case and the engine cover. In an engine room formed by and, in the outboard motor consisting of an engine arranged with a crankshaft and a camshaft arranged in the up-and-down direction, with the combustion chamber at the rear and the crank chamber at the front, An intake system, which is formed by sequentially connecting a carburetor and an air intake pipe to an intake passage communicating with the combustion chamber, is extended and arranged in the front-rear direction on one side of the engine, and the combustion system is provided on the other side of the engine. An exhaust passage communicating with the chamber is arranged vertically, and an oil filter is arranged at a position closer to the front than the exhaust passage, and a starting motor is provided in front of the engine. And an electric connection part is disposed between the starter motor and the exhaust passage, above the joint between the main body case and the engine cover, and on the side surface of the engine excluding the oil filter arrangement portion. A lid member that covers the side surface portion is provided.

According to the present invention, the exhaust passage and the oil filter are arranged front and rear on the same side of the carburetor of the engine, the starter motor is arranged on the front side of the engine, and the starter motor and By arranging electrical connection parts between the exhaust passages on the side surface of the engine excluding the oil filter arrangement part, these parts are not interfered with by the carburetor and do not interfere with each other, and the engine has a margin. It is also possible to arrange around them and thus also to adopt large parts for them.

Further, by arranging the electric connection parts together on the engine side surface part, the electric connection between the electric component parts appropriately arranged in each part of the engine can be facilitated. Since it is located above the mating surface between the engine cover and the engine cover, you can simply remove the engine cover without removing the engine from the case, and remove the lid member that covers the side surface of the engine to inspect the internal electrical wiring. It can be repaired, and inspection and repair work is extremely easy.

Moreover, since the side surface of the engine in which the electric connecting parts are arranged is usually covered with the lid member, it is possible to effectively prevent water splashing on the electric connecting parts and wiring inside. be able to.

[0011]

FIG. 1 is a side view of an outboard motor 1 according to the present invention.
In the figure, the left side is attached to the stern with the front side, that is, the hull side. The outboard motor 1 includes a main body case 2, an engine cover 3 that covers an upper opening of the main body case 2, and an engine room 4 formed by the main body case 2 and the engine cover 3 on an upper portion of the main body case 2. It consists of an engine 5 arranged. The engine cover 3 has a front end portion and a rear end portion that are detachably fixed to the main body case 2 via attachment / detachment devices 6, and the lower edge thereof is attached along the upper edge 7 of the main body case 2. The engine 5 is attached to the body case 2. This engine 5 has three cylinders 8, 8 and 8, which extend with their axes horizontal in the front-rear direction and are arranged in a row in the up-down direction.

Therefore, the piston 9 fitted in the cylinder 8
The crankshaft 11 driven by the connecting rod 10 is oriented vertically, and the drive shaft 12 connected to the crankshaft 11 via the interlocking mechanism extends from the engine 5 and the main body case 2
Extends downward inside the downward extension portion of the. A propeller shaft 13 extending rearward is drivingly connected to a lower end of the drive shaft 12, and a propeller 14 is fixed to a rear end portion of the propeller shaft 13 protruding to the outside.

A swivel shaft 15 is provided on the upper front surface of the main body case 2.
A swivel bracket 16 is pivotally mounted via a tilt shaft 17, and a front end portion of the bracket 16 is pivotally mounted via a tilt shaft 17 to a stern bracket 18 provided on the hull. Therefore, the outboard motor 1 attached to the hull can be horizontally rotated about the swivel shaft 15 and can be vertically tilted about the tilt shaft 17.

Next, the structure of the engine 5 will be described in more detail with reference to FIGS. 2 and 3. The main body of the engine 5 is composed of a cylinder block 19, a cylinder head 20, and a crankcase 21, and the crankcase 21 is located at the front.
The cylinder head 20 is arranged rearward and is housed in the engine room 4. As described above, the three cylinders 8 are vertically aligned in the cylinder block 19, and the crankshaft 11 is connected to the pistons 9 in each cylinder 8 via the connecting rod 10.
Extends vertically in a crank chamber 22 defined by a cylinder block 19 and a crankcase 21.

The lower portion of the crank chamber 22 communicates with the oil pan 23. The cylinder head 20 is provided with an intake port 24 on the right side and an exhaust port 25 on the left side for each cylinder 8 and is opened and closed toward the combustion chamber 28 by an intake valve 26 and an exhaust valve 27, respectively. Air intake pipe 29, carburetor 30 and intake pipe 31
An intake system consisting of is arranged in the front-rear direction along the right side surface of the engine body and is connected to the intake port 24. An exhaust passage 32 extending vertically is formed on the left side surface of the rear portion of the cylinder block 19, and the exhaust port 25 communicates with the exhaust passage 32. Exhaust passage 32 through exhaust port 25
The exhaust gas discharged to the outside is discharged from the lower end of the exhaust passage 32 through the outboard motor main body to the outside of the engine. The cylinder head 20 is also provided with three spark plugs 35, 35, 35 corresponding to the three cylinders 8, 8, 8 arranged in parallel in the vertical direction. As shown in the figure, they are arranged in a line at equal intervals in the vertical direction. A valve mechanism including a cam shaft 36 and a rocker arm 37 is disposed at the rear of the cylinder head 20, and a cylinder head cover 38 is provided so as to cover them.

A crankshaft 11 is provided on the upper front side of the engine body.
A charging generator 33 driven by the generator 33 is provided, and a starter motor 34, which is driven and supplied by a battery charged by the generator 33, is attached to the front surface of the crankcase 21.

Lubrication of the required parts of the engine 5 described above
This is performed by circulating the oil stored in the oil pan 23. Therefore, a main oil passage 39 is provided on the left side surface of the cylinder block 19 and in the front part of the exhaust passage 32. The oil in the oil pan 23 is guided to the main oil passage 39, and the main oil passage 39 is used for lubrication. It is designed to be distributed to each department. As described above, in the engine of the outboard motor, oil management is important, and fresh oil must always be supplied to each lubrication part. Therefore, a high-performance engine is installed at the inlet from the oil pan 23 to the main oil passage 39. With the oil filter 40 interposed, the oil from the oil pan 23 enters the main oil passage 39 after being sufficiently cleaned by the oil filter 40. Oil filter 40
Is provided so as to project outward from the cylinder block 19 using a space portion formed in front of the exhaust passage 32 on the left side of the cylinder block 19. As shown in FIG. 2, it is selected above the upper edge 7 of the main body case 2.

FIG. 4 is a side view showing a lubricating system by cutting a main part of the engine body. A trochoidal type oil pump 52 is arranged below the cam shaft 51, the rotor shaft 53 of the pump 52 has its upper end engaged with the lower end of the cam shaft 51, and the pump 52 is driven by the cam shaft 51. . An intake oil passage 54 is provided on the right side of the engine body, and the rear end of the intake oil passage 54 is connected to the intake port 55 of the oil pump 52. A front end of the suction oil passage 54 is connected to an upper end of a suction pipe 57 extending into the oil pan 23, and a screen-shaped oil strainer 58 is provided at a lower end of the suction pipe 57. The discharge port of the oil pump 52 is connected to the discharge oil passage 60. The discharge oil passage 60 extends forward on the lower left side of the engine body and communicates with the oil filter 40. The main oil passage 39 extends upward from the oil filter 40, and the oil filtered by the oil filter 40 is distributed from the main oil passage 39 to each lubricating portion.

On the left side surface of the engine body, an electrical component box 41 is provided adjacent to the oil filter 40. This electrical component box 41 is a cylinder block
A bolt 44 and a bolt are respectively attached to the bracket 42 protruding from the 19 and the bracket 43 protruding from the crankcase 21.
It consists of a bottom portion 41a fastened via 45 and a lid portion 41b that covers the opening facing the outside of the bottom portion 41a in an openable and closable manner. It is located above. That is, the bottom portion 41a is
Between the starting motor 34 and the exhaust passage 32, above the joint between the main body case 2 and the engine cover 3 and at the oil filter.
The engine side surface portion is formed excluding the 40-positioned portion, and electrical connection components are arranged in this portion as described below.

Inside the electrical component box 41, various electrical components such as the CDI unit 46 and a connector 47 for connecting electric wires to these electrical components are collectively housed, and a cylinder above the oil filter 40 is housed. In a portion near the head 20, three ignition coils respectively corresponding to the three ignition plugs 35, 35, 35 arranged in a line in the vertical direction and connection terminals 48, 48, 48 are arranged in a line in the vertical direction. They are arranged side by side. And the corresponding spark plug 35 and ignition coil
48 are connected to each other by a connecting cord 49.

In this embodiment, as described above, the exhaust passage
32 and an oil filter 40 are arranged in the front and rear on a surface on the left side opposite to the right side where the carburetor 30 of the engine 5 is provided, a starting motor 34 is arranged in the front side of the engine 5, and the starting motor is
Between 34 and the exhaust passage 32, electrical connection parts such as the connector 47, the ignition coil connection terminal 48, etc. are arranged on the engine side surface part except the arrangement part of the oil filter 40, that is, on the bottom part 41a of the electric component box 41. These can be arranged around the engine with a margin without being interfered with by the carburetor and without interfering with each other. Therefore, it is also possible to adopt large parts for them.

Further, by arranging the electric connecting parts together on the engine side surface part 41a, electric parts such as a generator 33 and a starter motor 3 which are appropriately arranged in each part of the engine are provided.
4. Electrical connection of the spark plug 35, the CDI unit 46, etc. becomes extremely easy and convenient.

Further, since the engine side surface portion 41a is located above the mating surface between the main body case 2 and the engine cover 3 together with the lid member 41b that covers the engine side surface portion 41a, the engine 5 is not taken out from the main body case 2. By simply removing the engine cover 3, the lid member can be removed to inspect and repair the internal electric wiring, and the inspection and repair work is extremely easy.

Moreover, the connector 47 and the ignition coil connecting terminal 48
Since such electrical connection parts are housed in the electrical component box 41, it is possible to effectively prevent splashing of water or the like on these electrical connection parts and wiring.

[0025]

According to the present invention, it is possible to arrange the intake and exhaust systems of the outboard engine and the main parts on the circumferential side of the engine body with no margin for interference with each other. It is possible to adopt parts.

Further, the electrical connection of the electrical components is easy, and the inspection and repair work of the electrical connection parts are easy,
Furthermore, it is possible to effectively prevent splashing of water or the like on the electrical connection portion and the wiring.

[Brief description of drawings]

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

FIG. 2 is an external side view of an engine in the outboard motor.

FIG. 3 is a horizontal sectional view taken along the axis of one cylinder of the engine.

FIG. 4 is a cutaway side view of an essential part of the engine body, excluding an electrical component box, an oil filter, and the like.

[Explanation of symbols]

1 ... Outboard motor, 2 ... Main body case, 3 ... Engine cover, 4
… Engine room, 5… Engine, 6… Detachment device, 7…
Upper edge, 8 ... Cylinder, 9 ... Piston, 10 ... Connecting rod, 11 ...
Crankshaft, 12 ... Drive shaft, 13 ... Propeller shaft, 14 ... Propeller, 15 ... Swivel shaft, 16 ... Bracket, 17 ... Tilt shaft,
18 ... Stay, 19 ... Cylinder block, 20 ... Cylinder head, 21 ... Crankcase, 22 ... Crank chamber, 23 ... Oil pan, 24 ... Intake port, 25 ... Exhaust port, 26 ... Intake valve,
27 ... Exhaust valve, 28 ... Combustion chamber, 29 ... Air intake pipe, 30 ... Vaporizer, 31 ... Intake pipe, 32 ... Exhaust passage, 33 ... Generator, 34 ... Starting motor, 35 ... Spark plug, 36 ... Camshaft , 37 ... Rocker arm, 38 ... Cylinder head cover, 39 ... Main oil passage, 40 ... Oil filter, 41 ... Electrical component box, 42 ... Bracket, 43 ... Bracket, 44 ... Bolt, 45 ... Bolt, 46 ... C
DI unit, 47 ... Connector, 48 ... Ignition coil and connection terminal, 49 ... Connection cord.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location F02B 67/00 H B63H 20/00

Claims (1)

[Claims] 1. A main body case attached to a hull via a bracket, an engine cover that is attachable to and detachable from an upper surface of the main body case, a crankshaft and a cam in an engine room formed by the main body case and the engine cover. An outboard motor comprising an engine having a shaft arranged in a vertical direction, a combustion chamber arranged rearward, and a crank chamber arranged frontward, wherein an intake air communicating with the combustion chamber is provided on one side of the engine. An intake system formed by sequentially connecting a carburetor and an air intake pipe to the passage is extended and arranged in the front-rear direction, and an exhaust passage communicating with the combustion chamber is arranged vertically on the other side of the engine, An oil filter is arranged at a position closer to the front than the exhaust passage, a starter motor is arranged at the front side of the engine, and the main motor is arranged between the starter motor and the exhaust passage. A ship characterized in that an electrical connection part is arranged above the joint between the body case and the engine cover and on the engine side surface part excluding the oil filter arrangement part, and a lid member for covering the engine side surface part is provided. Outside machine.