JPH04231283A - Regulate rectifier cooling device for outboard engine - Google Patents

Abstract

PURPOSE:To improve the cooling efficiency of a regulate rectifier by improving the installation position of the regulate rectifier. CONSTITUTION:A silencer case 19 is installed on the upstream side of the carburetor 18 of the engine unit of an outboard engine, a regulate rectifier 22 is installed in the silencer case 19, and the regulate rectifier 22 is cooled by the air flowing from the intake port 20 of the silencer case 19 to the carburetor 18.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a regulator rectifier housed in a marine engine such as an outboard motor.

0003

2. Description of the Related Art Many outboard motors and other marine engines are equipped with a regulator rectifier to rectify the starting current from an alternator, adjust the voltage, and charge the battery. This regulator rectifier is generally air-cooled to suppress overheating and maintain and stabilize its performance and function.

As shown in FIG. 6, an engine unit 1 of an outboard motor is covered with an engine cover 2 and installed on a drive shaft housing 3. In this engine unit 1, as shown in FIG.
The engine is a V-shaped engine arranged in the shape of a letter, and a parts holder 5 is arranged between these cylinder blocks 4. Inside this parts holder, there is an ignition coil and CDI (capacitive discharge ignition).
Electrical components such as units are stored centrally.

A regulator rectifier 6, which is also an electrical component, is installed on the back side of the parts holder 5. As shown in FIGS. 8 and 9, the regulator rectifier 6 has a heat sink 7 having a U-shaped cross section fixed to the back surface of the parts holder 5, and is bolted to the heat sink 7. Note that the heat sink 7 is made of aluminum, for example.

[0006]

[Problems to be Solved by the Invention] However, if the regulator rectifier 6 is installed in the above position, there is a possibility that sufficient cooling air will not necessarily be guided to the regulator rectifier 6. Therefore, if the charging output of the alternator is increased in this state, the heat generated by the regulator rectifier 6 cannot be sufficiently dissipated.
If cooling of the regulator rectifier 6 becomes insufficient, the temperature of the regulator rectifier 6 may rise, and the stability of its performance and operation may not be maintained.

The present invention has been made in consideration of the above-mentioned circumstances, and provides a regulator rectifier cooling device for an outboard motor that can improve the cooling efficiency of the regulator rectifier of the outboard motor. The purpose is to [Structure of the invention]

[0008]

[Means for Solving the Problems] According to the present invention, a silencer case is installed in an engine unit of an outboard motor on the upstream side of a carburetor, and a regulator rectifier is installed inside the silencer case. It is characterized by being cooled by air flowing from the intake port toward the carburetor.

[0009]

[Operation] Inside the silencer case, a large amount of air is sucked in from the intake port and flows toward the carburetor, but since the regulator rectifier is installed inside this silencer case, the air flowing inside this silencer case is regulated. It can dissipate the heat generated by the rectifier. As a result, the regulator rectifier is appropriately cooled, and the charging output of the alternator can be increased.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings.

FIG. 2 is a side view of an outboard motor to which an embodiment of the regulator rectifier cooling device for an outboard motor according to the present invention is applied. The outboard motor 10 includes, from above, an engine cover 12 housing an engine unit 11, a drive shaft housing 13 through which a drive shaft (not shown) passes, and a gear case 15 in which a screw 14 is pivotally supported. be done.

The engine unit 11 is a 6-cylinder V type in which cylinder blocks 17 are arranged in a V-shape in a crankcase 16 as shown in FIG. 3, and each cylinder block 17 has three cylinders (not shown) arranged vertically. It's an engine. Three carburetors 18 are arranged in tandem in the crankcase 16, and a silencer case 19 is installed on the upstream end surfaces of these carburetors 18. This silencer case 19
In this case, an intake port 20 as shown in FIG. 4 is opened. Air is taken in from the intake port 20 by the negative pressure inside the crankcase 16, and this air flows through the silencer case 19 and is guided to the carburetor 18, as shown in FIG. Reference numeral 21 in the figure is a throttle valve of the carburetor 18.

A regulator rectifier 22 is fixed to the inner wall of the silencer case 19 using mounting bolts 23. This regulator rectifier 22 is
The silencer is installed in the silencer case 19 in the middle of the air flow path from the intake port 20 toward the carburetor 18 . In addition, the regulator rectifier 22 has a
As shown in FIG. 2, cooling fins 24 are formed on the side surface facing the inside of the silencer case 19, thereby improving the heat dissipation performance of the regulator rectifier 22.

Therefore, when the engine unit 10 is started and air is taken into the silencer case 19 from the intake port 20 of the silencer case 19, the regulator rectifier 22 is forcibly cooled by the air flowing inside the silencer case 19. Therefore, sufficient heat radiation from the regulator rectifier 22 is achieved. In this way, the cooling efficiency of the regulator rectifier 22 is improved, so that the charging output of the alternator and the charging capacity of the battery can be increased.

Further, in this embodiment, the regulator rectifier 22 is installed inside the silencer case 19,
The regulator rectifier 22 is cooled using the intake air flow of the engine unit 11, and there is no need to install accessory parts such as electric fans, so the structure of the regulator rectifier 22 cooling device can be simplified. .

Furthermore, the regulator rectifier 2
2 is the silencer case 19 on the upstream side of the carburetor 18
Since it was installed inside the regulator rectifier 2
2, the temperature of the air flowing into the carburetor 18 can be increased. For this reason, the carburetor 18
It is possible to achieve a warming effect of 100% and prevent icing, etc.

[0017]

[Effects of the Invention] As described above, according to the regulator rectifier cooling device for an outboard motor according to the present invention, the regulator rectifier is installed in the silencer case installed on the upstream side of the carburetor, and the regulator rectifier is installed in the silencer case installed on the upstream side of the carburetor. Since the regulator rectifier is cooled by the air flowing from the intake port of the silencer case toward the carburetor, the cooling efficiency of the regulator rectifier can be improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view taken along line IV-IV in FIG. 4;

FIG. 2 is a side view showing an outboard motor to which an embodiment of the outboard motor regulator rectifier cooling device according to the present invention is applied.

FIG. 3 is a view from arrow III in FIG. 2;

FIG. 4 is a view taken along the IV arrow in FIG. 3.

FIG. 5 is a sectional view taken along line V-V in FIG. 1;

FIG. 6 is a side view showing an outboard motor to which a conventional regulator rectifier cooling device is applied.

FIG. 7 is a view along arrow VII in FIG. 6;

FIG. 8 is a view taken along arrow VIII in FIG. 7;

FIG. 9 is a view taken in the direction of the IX arrow in FIG. 8.

[Explanation of symbols]

10 Outboard motor 11 Engine unit 18 Carburetor 19 Silencer case 20 Intake port

Claims (1)

[Claims] [Claim 1] A silencer case is installed in the engine unit of an outboard motor on the upstream side of the carburetor, and a regulator rectifier is installed in the silencer case, and the air flows from the intake port of the silencer case toward the carburetor. A regulator rectifier cooling device for an outboard motor that is cooled by air.