JPH0220483A - Water cooling type cooling device for engine - Google Patents

Abstract

PURPOSE:To cope with a high rotation type engine by forming a joint passage at the part between carbureters of an integral type joint for a pair of adjacent carbureters, shortening a forward cooling water passage by connecting an engine and a radiator via the passage and shortening remarkably a suction pipe length. CONSTITUTION:Piping is executed by passing through between a pair of curbureters 12a, 12b and 12c, 12d for connecting a cooling water drain port and thermostat valve 22. Adjacent cab joints for carbureters are integrally formed and a metal made pipe 15 becoming a joint passage is inserted to the intercabureter part of an integral type cab joint 13. The forward cooling water passage may be shortened and no problem on the interference of the carbureter and a hose is caused, so the cab joint length can remarkably be shortened and a suction pipe length in a high rotation engine can be shortened.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a water-cooled cooling system for an engine employed in, for example, a motorcycle, and in particular to an outgoing cooling water connection connecting an exhaust port of an engine body and a radiator. The present invention relates to an improvement in the route of a cooling water passage, which enables the piping to be routed through the shortest distance, and also allows the carburetor to be disposed close to the engine.

[Conventional technology]

A water-cooled cooling system for a motorcycle has a radiator placed in front of the engine, and the radiator is connected to the discharge port of the water-cooled jacket of the cylinder head through an outgoing passage, and the radiator and the supply port of the cylinder block are connected via a cooling water pump. and are connected to each other at the return side passage. In this case, the thermostatic valve that opens and closes the cooling water passage is generally provided near the inlet side of the radiator due to space constraints. On the other hand, it is desirable that the discharge port and the radiator be connected through the shortest distance. Therefore, the applicant has proposed a cooling device that meets the above requirements by piping the outgoing cooling water hose from the discharge port of the cylinder head to pass between adjacent carburetors (for example, (Refer to Japanese Patent Application No. 1983-72825).

[Problem that the invention seeks to solve]

By the way, especially in high-speed engines, it is desirable to connect the carburetor to the engine through the shortest possible intake pipe. For this purpose, it is necessary to arrange the carburetor as close to the engine as possible.

However, the cooling device according to the above application has poor heat resistance.

In order to ensure strength, the outgoing cooling water hose, which has a relatively large diameter, is placed between the carburetors. It is necessary to separate the carburetor from the engine by a gap, and therefore the above-mentioned demand for shortening the intake pipe length cannot be satisfactorily met.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a water-cooled engine cooling system that can connect an engine and a radiator over the shortest possible distance, and can significantly shorten the length of an intake pipe.

[Means for solving problems]

The present invention provides a water-cooled cooling device that circulates cooling water between a radiator and an engine main body in which a plurality of carburetors are connected via cylinder members, in which at least one pair of adjacent carburetor cylinder members are integrally formed, It is characterized in that a jet int passage is formed in the portion between the carburetors of the integrated jitz int, and the passage is made a part of the outgoing cooling water passage connecting the exhaust port of the engine main body and the radiator.

Here, in the above-mentioned digital passage according to the present invention, there are two cases: a through hole is formed in the integrated di-bulb and this is used as a direct passage, and a vibrator made of a separate member is buried in the through hole. is included.

[Effect]

In the cooling system according to the present invention, since the engine body and the radiator are connected via the jet passage formed in the portion between the carburetors of the integrated cooling water, the outgoing cooling water passage follows the shortest route. Therefore, the outgoing cooling water passage can be shortened accordingly, and as a result, the precision in opening and closing the passage by the thermostatic valve is improved.

And when piping is run between the vaporizers like this,
Simply placing a cooling water hose between the carburetors does not allow the carburetor to be placed close to the engine, making it impossible to meet the demand for shortening the intake pipe length.In contrast, in the present invention, the adjacent carburetor joint In addition to integrally forming the members, a jet int passage is also integrally formed in the jet int, and this is used to connect the engine body and the radiator, so that the hose and the carburetor can be connected to each other as if the above-mentioned cooling water hose were simply arranged. Therefore, compared to this case, the jig-in member can be made much shorter, and it is possible to meet the demands of high-speed engines.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 5 are diagrams for explaining a water-cooled engine cooling system according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a motorcycle in which the device of this embodiment is adopted, and a front fork 4, which pivotally supports a front wheel 3 at its lower end, can be moved left and right by a steering shaft cylinder 2a formed at the front end of a body frame 2. It is rotatably supported. Further, a rear arm 5, which pivotally supports the rear wheel 6 at the rear end, is pivotably supported downward by the lower rear ends of the pair of left and right main vibes 2b.

Further, approximately in the center of the pair of main vibrators 2b, there are four vibrators in parallel.
A water-cooled four-stroke engine unit 7 with cylinders is suspended. This engine unit 7 has a crank case 8
”-Cylinder block 9. Cylinder head 10. It is constructed by laminating an engine body 30 consisting of a head cover 11 and a head cover 11. On the rear wall of the cylinder head 10,
A total of four vaporizers 12a to 12d, one for each tube, are installed.
It is attached via two cab bolts 13.

Each of the above-mentioned cab seat inserts 13b connects the pair of left and right cylinder parts 13a, 13b to the connecting part 1 using acrylic rubber.
It is an integral type that is integrally molded so as to be connected at 3e. A connecting flange 13d is integrally formed around the cylinder portions 13a and 13b, and the flange 13d is fixed to the intake port 10a of the cylinder head 10 with a fixing bolt 13e.

In addition, the intake holes 13f of the jet parts 13i and 13b are
Inside the left and right pair of vaporizers, 12a, L2b, or 1
The downstream connecting pipes 12111 of 2C and 12d are inserted and fixed with a fastening band 1311.

In the connecting portion 13C of the cab stomach indica 13,
A metal vibrator 15 serving as a joint passage is inserted in the longitudinal direction of the vehicle. This vibrator 15 constitutes a part of the cooling water passage of the cooling device of this embodiment, and its rear part 15a is bent downward, and its front part 15b is bent downward.
extends upward along the rear wall of the cylinder head 10.

A radiator 16 of the cooling system of this embodiment is arranged in front of the engine unit 7 in the vehicle width direction. This radiator 16 is located on the left side of the element 16a consisting of radiation fins.
The left and right side tanks 16b and 16C are connected to the right end.

The radiator 16 is located at the lower end of this left side tank 16b.
One end of a return hose 17, which is a return cooling water passageway from the engine 7 to the engine 7, is connected, and the other end of the hose 17 is connected to a suction port 18a of a cooling water pump 18 mounted on the side wall of the crankcase 8. It is connected. A return vibe 19 connected to the discharge port of the pump 18 extends in the vehicle width direction near the connection between the cylinder block 9 and the crankcase 8, and a branch pipe 19a from the extension.
, 19b is the left side formed at the bottom of the cylinder block 9,
It is connected to the right water supply ports 9a and 9b.

and the left formed in the cylinder head 10.

At the right outlet 10b, 10e, the above-mentioned Capji feed India 1
The rear part 15a of the metal vibrator 15 inserted into 3
is inserted and connected. Further, the front portion 15b of this metal vibrator 15 is connected to a thermostatic valve 22 through supply hoses 21a and 21b. This thermostatic valve 22
is opened to circulate the cooling water when the cooling water temperature reaches a predetermined temperature or higher, and is attached to the right main vibe 2b. Furthermore, this thermostatic valve 22 is connected to the upper end portion of the right side tank 16c of the radiator 16 by a connecting hose 23.

Next, the effects of this embodiment will be explained.

In the cooling system of this embodiment, when the cooling water in the cylinder block 9 and cylinder head 10 reaches, for example, 80°C, the thermostat valve 22 opens, and the cooling water circulates between the engine unit 7 and the radiator 16. At this time, it is cooled by the radiator 16 and maintained at a predetermined temperature.

In such a cooling operation, it is desirable to connect the cooling water outlet and the thermostatic valve 22 as short as possible, but in this embodiment, the pair of vaporizers 12a and 12b
Since the piping is routed through between 12C and 12d, the outgoing cooling water passage can be short, and the above-mentioned requirements can be met.

In this embodiment, in order to realize piping that passes between the carburetors, the carburetor twints for adjacent carburetors are integrally formed, and a metal vibrator is installed between the carburetors of the cough-integrated carburetor line 13 to serve as a joint passage. 15, there is no problem of interference between the carburetor and the hose, and therefore the length of the carburetor joint can be significantly shortened, meeting the demand for shortening the length of the intake pipe in high-speed engines.

In the above embodiment, two carburetor cab joints are integrally formed, but in the cab joint of the present invention, all carburetor cab joints may be integrally formed.

Further, in the above embodiment, the joint passage is connected to the metal vibrator 15.
However, the joint passage of the present invention may be formed by forming a through hole in the cab and serve as a passage as it is. In this case, it is necessary to use a water-resistant material for the joint.

〔Effect of the invention〕

As described above, according to the water-cooled cooling device for an engine according to the present invention, at least one pair of adjacent carburetor joint members are integrally formed, a joint passage is formed in a portion between the carburetors of the integral joint, and the joint passage is formed in a portion between the carburetors of the integral joint member. Since the engine and radiator are connected through the radiator, the outgoing cooling water passage can be shortened, and there is no problem of interference between the cooling water passage between the carburetors and the carburetor, which reduces the carburetor joint length, that is, the intake pipe length. This has the effect of significantly shortening the time and making it compatible with high-speed engines.

[Brief explanation of the drawing]

1 to 5 are diagrams for explaining a water-cooled cooling system for an engine according to an embodiment of the present invention. 3 is a side view of an engine in which the embodiment device is adopted, FIG. 4 is a plan view thereof, and FIG. 5 is a sectional front view of the embodiment.
FIG. 2 is a left side view of a motorcycle in which the device is adopted. In the figure, 7 is the engine unit, 122 to 12d are the carburetors, and 13 is the carburetor joint (integrated joint).
, 15 is a metal vibe (joint passage), 1G is a radiator, and 30 is an engine body. Patent Applicant Yamaha Motor Co., Ltd. Agent Patent Attorney Tsutomu Tsutomu Figure 3 Figure 1 Figure 2 Figure 4

Claims (1)

[Claims] (1) In an engine in which an engine body including a plurality of cylinders is arranged tilted forward, and a plurality of carburetors are connected to the rear wall of the engine body via joint members, the engine and the front thereof are A cooling device that circulates cooling water between disposed radiators, the cooling device including at least one pair of adjacent carburetor joint members integrally formed, and a joint passage formed in a portion between the carburetors of the integral joint, A water-cooled cooling device for an engine, characterized in that the passage is a part of an outgoing cooling water passage connecting an engine main body and a radiator.