JPS63314307A - Water cooling device for horizontal single cylinder engine - Google Patents

Abstract

PURPOSE:To aim at the compactification of an engine and improvement in cooling capacity by setting up a radiator in a side space of the engine, and making this radiator come nearer to a water jacket, while setting up each of suction and exhaust ports at both sides in front and in the rear of a cylinder head. CONSTITUTION:A radiator 10 is set up in a side space A of a cylinder head 17 being situated at the side of a horizontal single-cylinder engine 6. And, a hot water inlet 10a and a cooling water outlet 10b of the radiator 10 are made to come nearer to a hot water outlet 19b and a cooling water inlet 19a of a water jacket 19 respectively. In addition, of both sides 17a and 17b in front and in the rear of the cylinder head 17, a suction port 22 is opened to one side and an exhaust port 25 to the other side, respectively. The suction pipe 23 connected to the suction port 22 and an air cleaner 24 are set up in one side of the cylinder head 17, while the exhaust pipe 26 connected to the exhaust pipe 25 and a muffler 27 are set up in the other side of the cylinder 17.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a water-cooled cooling device for a horizontal single-cylinder ennon;
This technology makes the entire engine more compact and improves cooling performance.

(Prior Art) Conventional water-cooled cooling systems for horizontal engines include the following.

◎ Conventional example 1 (see Fig. 5) In this example, the radiator 10 is placed on the upper wall of the cylinder block 13 of the horizontal ennon 6, and the lower part of the water pipe 10c of the radiator 10 is placed on the upper part of the water jacket 19 in the cylinder block 13. It is a communication of

◎ Conventional example 2 (see Fig. 6) In this example, the radiator 10 is arranged in the lateral outer space B of the crankcase 13a located on the side of the horizontal engine 6, and the hot water inlet 10a at the upper part of the radiator 10 and the cold water outlet at the lower part of the radiator 10 are connected. 10b is connected to an upper hot water outlet 19b and a lower cold water inlet 19a of the water jacket 19 via flexible hot water pipes 46 and cold water pipes 47.

(Problem to be solved by the invention) Each of the above conventional examples has the following problems.

◎ Conventional example 1 (see Figure 5) (b) The overall height of the engine is high.

Since the radiator 10 stands up on the earthen wall of the cylinder block 13, the overall height of the engine 6 increases.

◎ Conventional example 2 (see Figure 6) (b) Pipe resistance of hot water pipes and cold water pipes is large.

Since the hot water inlet 10a and the cold water outlet 10b of the radiator 10 are located far away from the hot water outlet 19b and the cold water inlet 19a of the quarter jacket 19 with the crankcase 13a in between, the hot water pipe 46 and the cold water pipe 47 have a long overall length. The pipe resistance becomes large, reducing the cooling water circulation efficiency and worsening the cooling performance.

(c) Air pockets and steam pockets are formed in the hot water pipe 46.

Since the hot water pipe 46 is flexible, it has the advantage of absorbing the vibrations of the Ennon 6 and being less likely to be damaged. However, since it is long, it may sag, bend, or collapse, causing damage to the upstream side of the sagging portion. This tends to cause air pockets and steam pockets, and these air pockets impede the circulation of cooling water, deteriorating cooling performance.

(d) Insufficient supply of cooling water.

Water inlet 42c of upper tank 42a of radiator 10
When cooling water is injected from the upper tank 42a of the radiator 10, the cooling water quickly flows from the upper tank 42a of the radiator 10 into the hanging part of the hot water pipe 46 and blocks it. The upstream portion of the water jacket 19 and the upper part of the water jacket 19 cannot be filled with cooling water, and air pockets remain.

The present invention solves all of the above problems (a) to (d),
The purpose is to make the entire engine more compact and improve cooling performance.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides cooling water in the upper part of the water jacket 19 of the horizontal single-multicylinder engine 6, as shown in FIGS. hot water outlet 19b,
A cold water inlet 19a is provided in a lower part, a hot water inlet 10a is provided in the upper part of the radiator 10, and a cold water outlet 10b is provided in the lower part.
The hot water outlet 19b of the overshacket 19 is connected to the hot water inlet 10a of the radiator 10 via a flexible hot water pipe 46, and the cold water outlet 1ob of the radiator 10 is connected to the cold water inlet 19a of the water jacket 19 through a cold water pipe. 47, the cooling water absorbs heat in the water jacket 19, cools the cylinder 14 and cylinder head 17, becomes high-temperature water, passes through the hot water pipe 46, radiates heat in the radiator 10, becomes low-temperature water, and enters the cold water pipe. In a water-cooled cooling system for a horizontal single-cylinder engine configured to circulate water through a water jacket 19 through a horizontal single-cylinder engine 6, a radiator 10 is installed in a lateral outer space A of a cylinder head 17 located on a lateral side of a horizontal single-cylinder engine 6. Place the hot water inlet 1 of the radiator 10
0a is located close to the hot water outlet 191+ of the water jacket 19, and the cold water outlet 10b of the radiator 10 is located close to the cold water inlet 19a of the automatic shaft 19.
In contrast, an intake port 22 is opened on one side of the cylinder head 17a and an exhaust port 25 is opened on the other side, and an intake pipe 23 and an air cleaner 24 connected to the intake port 22 are provided on one side of the cylinder head 17. The exhaust pipe 26 and muffler 27 connected to the exhaust port 25 are connected to the cylinder head 17.
It is characterized by being provided on the other side.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a cross-sectional plan view of a soundproof engine generator, Figure 2 is a schematic perspective view thereof, Figure 3 is a vertical front view, and Figure 4 is a
It is a sectional view taken along the line IV-IV in the figure.

In the figure, 1 is a soundproof engine generator, and 2 is its soundproof case. This soundproof case 2 is formed in a horizontally long shape, and arrow F in FIG. 2 indicates the front side, arrow H indicates the rear side, and the arrow R indicates the left side when viewed from the front, and the arrow R indicates the right side when viewed from the front. are shown respectively.

The soundproof case 2 has a large surface covered in a sealed manner, and the inside thereof is configured as follows. That is, a common base 5 is supported on the bottom wall 2b via a plurality of vibration isolating rubbers 4, and a water-cooled horizontal single-cylinder engine 6 and a generator 7 are arranged side by side on the common base 5. A fuel tank 8 is fixed to the upper wall 2c of the soundproof case 2 above the generator 7. Further, an electric radiator 10 is provided on the left side of the engine 6 as described above. In the figure, 2a is the front wall and 1.2r is the rear wall.

First, the horizontal single-cylinder engine 6 will be explained.

Inside the cylinder block 13 is a cylinder 14 facing the Tsumugi-shin configuration.
The piston 15 is inserted into. Further, an oil pan 16 is provided protruding from the lower part of the cylinder block 13, and a cylinder head 17 and a head cover 18 are fixedly provided in this order on the left side. Engine 6 water jacket 191
Cylinder jacket 19c for cooling the cylinder 14 and head jacket for cooling the cylinder rad 1f) 19
cl and a jacket cover 20 provided on the upper part of the cylinder block 13 are communicated with each other. The intake port 22 provided on the front side surface 17a of the cylinder head 17 is connected to the intake pipe 2.
3 to the air cleaner 24. The intake pipe 23 and the air cleaner 24 are arranged in the front part of the soundproof case 2. On the other hand, an exhaust port 25 provided on the rear side surface 17b of the cylinder rad 17 is connected to a muffler 27 via an exhaust pipe 26. These exhaust pipe 26 and muffler 27 are provided in the rear part of the soundproof case 2.

Further, a crankshaft 29 projects rearward from a center portion on the rear side of the cylinder block 13, and a seven-wheeler 30 is fixed to the projecting end thereof. This flywheel 30
is covered with a flywheel cover 31, and a drive boob IJ32 is provided protruding from the rear surface of the flywheel 30. Further, a starter motor 34 is fixed to the rear upper part of the cylinder block 13 via a bracket 33.

A starting pinion of this starter motor 34 is meshed with a ring gear of the flywheel 30.

The starter motor 34 is connected to the battery 11.

The generator 7 has an input shaft 36 disposed parallel to the crankshaft 29 of the engine 6, and an input pulley 37 is fixed to the protruding end of the input shaft 36.

A drive belt 38 is stretched between the man-cube 937 and the drive pulley 32.

Further, the cooling system for the engine 6 is configured as follows.

The radiator 10 is arranged in a lateral outer space A of a cylinder head 17 located on the side of the engine 6 (on the left side in the figure) with its air intake surface facing the cylinder head 17 side. The radiator 10 is configured as a forced ventilation type, and includes a radiator main body 42 and a forced ventilation 7 provided on the ventilation inlet side of the radiator body 42.
It consists of a fan drive motor 43 and a fan drive motor 44.

The hot water inlet 10a is connected to the upper tank 42°a of the radiator body 42, and the cold water outlet 1 is connected to the lower tank 42b.
0b are provided in a protruding manner. The above upper tank 42a
A water inlet 42c is provided on the upper side. Meanwhile, the water jacket 19 is provided with a cold water inlet 19a on the lower surface of the head jacket 19d at the lower position, and a hot water outlet 19b at the jacket cover 20 at the upper position. Additionally, the hot water inlet 10a of the radiator 10 is located close to the hot water outlet 19b of the water jacket 19, and the cold water outlet 10b of the radiator 10 is located close to the cold water inlet 19a of the water jacket 19. The hot water inlet 10a of the radiator 1o and the hot water outlet 19b of the water jacket 19 are connected via a flexible hot water pipe 46, and the cold water outlet 1°b of the radiator 10 and the cold water inlet 1 of the automatic jacket 19 are connected to each other via a flexible hot water pipe 46.
9a are connected to each other via a flexible cold water pipe 47.

A water bomb 50 for forced circulation of cooling water is interposed in the middle of the cold water pipe 47. This auto bomb 50 is interlocked and connected to the crank pongee 29 of the engine 6. That is,
An inlet valve 1751 is connected to the auto pump 50, and a pump drive boob J32a is formed inside the drive pulley 32 of the engine 6. A drive belt 54 is provided between the pump drive pulley 32a and the pump input pulley 51.
is strung up.

The Ennon power generation rock 1 having the above configuration operates as follows.

The engine 6 is started by driving the starter motor 34 with the battery 11, and the generator 7 starts generating electricity. As the engine 6 operates, the cylinder 14, cylinder head 7, exhaust pipe 26, etc. generate heat.

Simultaneously with the operation of the engine 6, the rotor pump 50 is driven via the drive belt 54, and the motor 44 of the radiator 10 is also driven, so that the radiator 43 blows air to the radiator body 42. The cylinder 14 and the cylinder 17 are cooled by forcing the cooling water in the water jacket 19 to circulate through the radiator wood 42 through the two auto pumps 50. That is, the head jacket 1 is supplied from the cold water inlet 19a by the two-over pump 50.
The cooling water discharged into the cylinder jacket 19
While the hot water flows out from the hot water outlet 19b through the cylinder 1
4 and the cylinder y)' 17 to become high-temperature water, and this high-temperature water passes through the hot water pipe 46 and radiates heat in the radiator 10 to become low-temperature water. This low temperature water auto pump 50
By returning the cold water pipe 47 to the water jacket 19, the cooling water circulates within the cooling system.

Further, in the above case, as the 7-ring 43 of the radiator 10 is operated, the outside air intake port 3 of the right side wall 2d of the soundproof case 2
After cooling the cylinder head 17 and exhaust pipe 26 of the generator 7 and engine 6, the outside air taken in from the outside air is heated by cooling high-temperature water in the radiator body 42, and is heated through the air outlet on the left side wall 2e of the soundproof case 2. Ejected from 3e. Note that, since the 7-an 43 is configured as a forced ventilation type, the fan 43 and the motor 44 are not heated by the hot air discharged from the radiator body 42, unlike when configured as a suction ventilation type. The service life of the engine 43 and motor 44 is extended.

In addition, in the above embodiment, the front side surface 1 of the cylinder radius 17
Intake port 22 on 7a, exhaust port 2 on rear side 17b
However, instead of this, the exhaust port 25 is formed on the front side surface 17a of the cylinder head 17, and the exhaust port 25 is formed on the rear side surface 17b of the cylinder head 17.
The intake port 22 may be formed in the. Also,
Although the cooling system is configured to be a forced circulation type, it may be a natural circulation type.

(Effect of the invention) The present invention has the following effects.

(b) The overall height of the engine is reduced.

Since the radiator is disposed at a low position in the lateral outer space of the engine, the overall height of the engine is reduced.

(b) The flow resistance of the water-cooled pipe becomes smaller.

Since there are no large inclusions such as crankcases between the hot water inlet of the radiator and the hot water outlet of the water jacket, and between the cold water outlet of the radiator and the cold water inlet of the water jacket, hot water pipes and cold water pipes are removed. The length of each pipe becomes shorter. Therefore, the flow resistance of the water cooling pipe becomes smaller, the amount of circulating water increases, and the cooling performance of the water cooling device improves.

(c) Air pockets in hot water pipes are eliminated.

As mentioned in the above item (b), since the flexible hot water pipe is formed in a short length, it is prevented from drooping, bending, or being crushed (1). This prevents the circulation of cooling water from being obstructed by the formation of air pockets or steam pockets in the middle of the hot water pipes, and improves the circulation capacity of cooling water.

(d) Sufficient supply of cooling water.

As mentioned above, the hot water pipe has no hanging parts, so when replenishing cooling water from the radiator water inlet,
Sufficient replenishment can be achieved by filling the entire length of the hot water pipe and the top of the water jacket with cooling water while expelling the air in the hot water pipe. - (E) Since the air cleaner and muffler are placed on opposite sides across the cylinder head, it is difficult for the stray gas discharged from the muffler to mix with the intake air taken in by the air cleaner, and the intake air flowing through the air cleaner and intake pipe Since the fuel is less likely to be heated by the muffler or exhaust pipe, charging efficiency increases and engine output increases.

(f) The intake pipe and the exhaust pipe are piped apart from each other and do not interfere with each other, so the piping can be done simply and the piping work does not take much time.

The present invention has the following effects when configured as shown in FIGS. 1 to 4 as preferred embodiments thereof.

(,) By arranging the radiator 10 along a plane parallel to the crank pongee 29 of the engine 6, the total length of the engine 6 in the lateral direction is shortened, so that the entire engine 6 can be made compact.

(b) Even when the engine 6 is mounted inside the sealed soundproof case 2, the exhaust heat of the cylinder head 17 can be transferred to the case by circulating the cooling air from the radiator 10 from the cylinder 17 side to the radiator 19 side. 2. Since it can be smoothly discharged outside, there is no possibility of heat being trapped in the upper space of the soundproof case 2. Therefore, the temperature inside the soundproof case 2 is kept relatively low, and the reliability of the electrical equipment installed inside the soundproof case 2 is improved.

[Brief explanation of drawings]

Figures 1 to 4 show embodiments of the present invention; Figure 1 is a cross-sectional plan view of a soundproof engine generator, Figure 2 is a schematic perspective view thereof, and Figure 3 is a longitudinal front view of the Ennon power generation rock. 4 is a sectional view taken along the line IV-1117 in FIG. 3, FIG. 5 is an elevational view of a horizontal encun showing conventional example 1, and FIG. 6 is a conventional example 2.
FIG. 2 is an elevational view of a horizontal engine. 6... Horizontal single cylinder engine, 10... Radiator, 10a... Hot water population, 10b... Cold water outlet, 14... Cylinder, 17... Cylinder head, 17a... Front side, 17b ...posterior side, 19
...Water jacket, 19a...Cold water inlet, 19b...Hot water outlet, 22...Intake port,
23...Intake pipe, 24...Air cleaner, 25.
... Exhaust port Y, 26... Exhaust pipe, 27... Muffler, 46... Hot water pipe, 47... Cold water pipe, A... Lateral outer space. Figure 4

Claims (1)

[Claims] 1. Water jacket 19 of horizontal single-multicylinder engine 6
A hot water outlet 19b of the cooling water is opened in the upper part of the radiator 10, a cold water inlet 19a is opened in the lower part of the radiator 10, a hot water inlet 10a is opened in the upper part of the radiator 10, a cold water outlet 10b is opened in the lower part of the radiator 10, and the hot water outlet 19b of the water jacket 19 is connected to the radiator 10. The hot water inlet 10a of the radiator 10 is connected via a flexible hot water pipe 46, and the cold water outlet 10b of the radiator 10 is connected to the water jacket 1.
9 through a cold water pipe 47, the cooling water absorbs heat within the water jacket 19 and flows into the cylinder 14.
Water cooling of a horizontal single-cylinder engine configured such that high-temperature water cools the cylinder head 17, passes through a hot water pipe 46, radiates heat in the radiator 10, becomes low-temperature water, passes through a cold water pipe 47, and circulates to the water jacket 19. In the type cooling system, the radiator 10 is arranged in the lateral outer space A of the cylinder head 17 located on the side of the horizontal single-cylinder engine 6, and the hot water inlet 10a of the radiator 10 is connected to the water jacket 1.
In addition to being located close to the hot water outlet 19b of No. 9,
The cold water outlet 10b of the radiator 10 is located close to the cold water inlet 19a of the water jacket 19, the intake port 22 is opened on one of the front side 17a and the rear side 17b of the cylinder head 17, and the exhaust port 25 is opened on the other side. An intake pipe 23 and an air cleaner 24 connected to the intake port 22 are provided on one side of the cylinder head 17, whereas an exhaust pipe 26 and a muffler 27 connected to the exhaust port 25 are provided on the other side of the cylinder head 17. A water-cooled cooling system for a horizontal single-cylinder engine that is characterized by