JPS6226579Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an internal combustion engine that is integrally equipped with a radiator and a cooling fan. The present invention relates to an inclined internal combustion engine arranged in a straight line.

(Prior Art) In conventional water-cooled engines, the cooling fan is driven via a pulley provided at the end of the engine's crankshaft and a fan belt wrapped around the pulley. , is supported parallel to the crankshaft.

Therefore, in order to simultaneously cool the cylinder block using the cooling air generated by the cooling fan, it is necessary to arrange them in the order of (a) cooling fan → radiator → cylinder block along the longitudinal direction of the engine, or
(b) It is conceivable to arrange the radiator → cooling fan → cylinder block in this order.

(For example, see Japanese Utility Model Application Publication No. 53-32246.) (Problems to be solved by the invention) However, when a radiator is interposed between the cooling fan and the cylinder block as in (a) above,
Since the radiator occupies a considerable volume, the radiator and cooling fan protrude in the direction of the crankshaft, causing the problem that the installation space for the entire engine becomes longer in the front and back. In addition, when arranged as in (b) above, it is necessary to provide a large space between the radiator and the cylinder block to accommodate the cooling fan, which increases the installation space of the engine and also requires the cooling water on the cylinder block side. The piping connecting the jacket and the radiator's water inlet and outlet becomes quite long, making it difficult to adopt a cooling method using natural circulation, which necessitates the installation of a separate cooling water pump, which increases the number of parts in the machine and increases costs. A problem arose.

The present invention was developed by focusing on the problems that conventional internal combustion engines had.The cylinder block is tilted around the crankshaft, and a radiator and a cooling fan are installed in this order adjacent to the upwardly inclined side surface of the cylinder block. Therefore, they are arranged diagonally in a straight line along the airflow direction, and the cooling fan and radiator are housed in a dead space on the side of the cylinder block to reduce the installation area, and the cooling air generated by the radiator can simultaneously operate the radiator and cylinder block. The purpose is to cool it down and thereby solve the above-mentioned problems.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to the accompanying drawings corresponding to embodiments.

The tilted internal combustion engine of the present invention has a cylinder body 2 placed vertically on a horizontal base 3, with a
A cylinder block 1 is integrally formed with the crankshaft 4 as the center and inclined at a required angle α from the vertical line v. A cylinder head 10 is attached to the upper part of the cylinder block 1, and the cylinder head 10 is attached adjacent to the upwardly inclined side surface of the cylinder block 1. A flat radiator 8 is attached to the cooling water inlet/outlet 9 of the radiator 8,
12 is communicated with the cylinder block 1 and the water jacket 6 in the cylinder head 10, and a cooling fan 15 is disposed on the outer surface of the radiator 8, which is supported by the cylinder block 1.

(Function) Therefore, in the tilted internal combustion engine of the present invention having the above configuration, the radiator 8 and the cooling fan 15 are installed in a stacked manner on the upwardly inclined side surface of the tilted cylinder block 1. They are much smaller than if they were placed at the front of a vertical internal combustion engine, and
Since the cylinder block 1, the radiator 8, and the cooling fan 15 are linearly arranged in this order, the radiator 8 and the cylinder block 1 are simultaneously cooled by the cooling air generated by the cooling fan 15.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

The figure is a front sectional view showing one embodiment of the inclined internal combustion machine of the present invention, in which a cylinder body 2 with a cylinder block 1 provided on the upper part is attached to a base 3. A cylinder liner 5 is disposed in the cylinder block 1 and is surrounded by a water jacket 6, which is inclined at an angle α to a vertical line v passing through the center 0 of the crankshaft 4. Above cylinder block 1
A flat radiator 8 is provided on the upwardly inclined side surface, parallel to the centerline 7 of the cylinder liner 5, and an outlet 9 of the radiator 8 communicates with the water jacket 6. 6 is
It communicates with the water jacket 11 of the cylinder head 10 located at the top of the cylinder block 1. or,
This water jacket 11 communicates with the upper part of the radiator 8 via an inlet 12. Further, on the opposite side of the cylinder block 1 across the radiator 8, there is a motor 14 having an axis 13 orthogonal to the center line 7.
A cooling fan 15 attached to the cooling fan 15 is housed in a fan case 16, and an airflow guide duct 17 is connected to the upper part of the fan case 16. The fan motor 14 can be driven by a generator or starter motor 18 installed in a flywheel (not shown), and its rotation and stop can be controlled by a temperature sensor 20 installed in the cooling water passage 19. It can also be configured to rotate only when the cooling water temperature is high.

The inclined type internal combustion engine of the present invention has the above-mentioned configuration, and if the fan motor 14 is driven to cause the cooling air from the cooling fan 15 to flow in the direction of the arrow X, the cooling air will flow to the radiator 8. After cooling and passing through, it collides with the outer wall of the cylinder block 1 and cools the cylinder block 1 while flowing around it. On the other hand, if the fan motor 14 is rotated in the opposite direction to the above case so that the cooling air sucked in by the cooling fan 15 flows in the direction of the arrow Y, the air that has cooled the area around the cylinder block 1 will flow through the radiator 8. As it passes, it cools the radiator 8 and is discharged from the airflow guide duct 17.

(Effects of the invention) As described above, the tilted internal combustion engine of the present invention has a cylinder block mounted on the upper part of the cylinder body placed on a horizontal base with the cylinder block tilted at a required angle from the vertical line about the crankshaft. are integrally formed,
A cylinder head is attached to the upper part of the cylinder block, and a flat radiator is attached adjacent to the upwardly inclined side surface of the cylinder block, and the cooling water inlet and outlet of the radiator is communicated with the water jacket in the cylinder block and the cylinder head. , by disposing a cooling fan on the outer surface of the radiator and supporting it by the cylinder block, the cooling fan, radiator and cylinder block are linearly arranged in this order, and the radiator and cooling fan are arranged on the cylinder block. Since it is housed in a dead space formed on the upwardly sloping side surface, the entire engine including the cooling system can be made compact, and the overall height and installation area of the engine can be greatly reduced. Cooling efficiency is high because the generated cooling air cools the radiator and cylinder block simultaneously, and since the radiator and cylinder block are placed next to each other, the cooling water communication path between them is shortened. , which has the excellent effect of allowing smooth circulation of cooling water.

Furthermore, if the cooling fan of the present invention is a motor-driven type, compared to the conventional belt-driven type, parts such as belts, tension pulleys, and crank pulleys can be omitted, and the tensile stress caused by the belt is eliminated. It is also possible to expect the effect of reducing the thickness and weight of fan cases and the like.

[Brief explanation of drawings]

The figure is a front sectional view showing an embodiment of an inclined internal combustion engine according to the present invention. 1...Cylinder block, 2...Cylinder body, 3...Foundation stand, 4...Crankshaft, 6, 11
... Water jacket, 8 ... Radiator, 9 ... Cooling water outlet, 10 ... Cylinder head, 12 ... Cooling water inlet, 14 ... Fan motor, 15 ... Cooling fan, V ... Vertical line.

Claims (1)

[Scope of utility model registration request] A cylinder block is integrally formed on the upper part of the cylinder body placed on a horizontal foundation in a state inclined at a required angle from the vertical line with the crankshaft as the center, and a cylinder head is attached to the upper part of the cylinder block. A flat radiator is attached adjacent to the upwardly inclined side surface of the cylinder block, the cooling inlet and outlet of the radiator is communicated with the water jacket in the cylinder block and the cylinder head, and a cooling fan is disposed on the outer surface of the radiator. An inclined internal combustion engine, characterized in that: is supported by the cylinder block.