JPS6313008B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water cooling device applied to a motorcycle equipped with a water-cooled V-type engine.

[Conventional technology]

In recent years, large displacement engines have appeared due to increased output. In order to obtain such a large engine, the number of cylinders must be increased and the cooling system must be water-cooled. For this reason, a radiator is disposed in front of the engine, and a tube connects the radiator and the engine.

[Problem that the invention seeks to solve]

However, conventional motorcycles of this type have disadvantages in that the pipe connecting the radiator and the engine is inevitably long and the piping is complicated. These problems cannot be ignored, especially from the viewpoint of extreme restrictions on mounting space, weight reduction, and appearance, which are unique to motorcycles.
A solution was desired.

[Means for solving problems]

The cooling water inlets and outlets of the radiator located in front of the engine are separated from each other to the left and right, and the engine is arranged so that each cylinder is located in front and behind, and the inlet and outlet of the cooling water passage that cools each cylinder is installed. The cooling water outlet of the radiator and the inlet side of the cooling water passage that cools each cylinder are located on one side and connected by a pipe body, and the radiator cooling The water inlet and the outlet side of the cooling water passage that cools each cylinder are arranged on the other side and connected by a pipe body.

[Effect]

The valley between the cylinders in a V-type engine can be used, and the cooling water outlet of the radiator and the inlet side of the cooling water passage that cools the cylinders are placed on one side, and the cooling water inlet of the radiator and the cooling water passage that cools the cylinders are placed on one side. Because the outlet side and the other side are connected by pipe bodies,
The connecting tube becomes shorter and the piping is simplified.

〔Example〕

FIG. 1 is a side view of a motorcycle showing an embodiment of the present invention, and FIG. 2 is a plan view showing a cooling system.
In FIG. 1, numeral 1 is the main frame,
It includes a steering head pipe 2, a pair of left and right tank rails 3, and a pair of left and right side tubes 4. 5 is the front fork, 6 is the front wheel, 7
is a rear wheel, and this rear wheel 7 is held by a rear arm 8 that is pivotally supported by the main frame 1.
Reference numeral 9 denotes a water-cooled V-type four-cylinder engine, each of whose cylinder rows 10 and 11 are inclined in the longitudinal direction of the vehicle body, and is mounted in a side tube 4 so as to be suspended from the left and right sides. An intake pipe 12 of the engine 9 is located inside the cylinder rows 10 and 11 and extends upward almost vertically. Exhaust pipes 13 and 14 are connected to the outside of each cylinder row 10 and 11. There are two front exhaust pipes 13, which are connected from the front of the engine 9 to an exhaust silencing box 15 disposed below the engine 9. There are two exhaust pipes 14 on the rear side, and a pivot shaft 16 of the rear arm 8 is connected from the rear of the engine 9.
and the rear wheel 7, and is connected to the sound deadening box 15. Reference numeral 17 designates a muffling pipe that guides exhaust gas from the muffling box 15 to the rear, and 18 designates a fuel tank installed astride the tank rail 3, inside which the intake pipe 1 is installed.
The top of 2 is facing you. The upper opening of this intake pipe 12 opens into a connecting box 19, and an air cleaner (not shown) disposed at a position surrounded by each intake pipe 12 is connected to this connecting box 19. Note that 20 is a carburetor provided in the intake pipe 12.

Next, the cooling system will be explained. A pump 21 is driven by the engine 9 and circulates cooling water, and is provided on the left side of the vehicle body. On the other hand, a cooling water passage through which cooling water passes is formed in each cylinder row 10, 11 of the engine 9, and an inlet 22 thereof is connected to each cylinder row 10, 11.
There are openings inside for each cylinder. Also, one outlet 23 of this cooling water passage is opened inside each cylinder row 10, 11. That is, the cooling water that separately flows into each cylinder row 10, 11 for each cylinder is collected within each cylinder row 10, 11, and flows out from the outlet 23. Each cylinder row 10,
A pipe body 24 constituting a cooling water passage connected to the inlet 22 of each cylinder is arranged near the bottom of the cylinder 11, that is, in a valley, so as to extend in the lateral direction of the vehicle body, and one end of the pipe body 24 is connected to a distribution pipe 25 and a pipe 26. It is connected to the discharge port of the pump 21 via. Further, the outlet 23 provided in each of the cylinder rows 10 and 11 is connected to a thermostat 28 by a pipe body 27 that constitutes a cooling water passage that is arranged between the cylinder rows 10 and 11 separately from the pipe body 24. It is connected. This thermostat 28 is arranged on the right side of the vehicle body opposite to the distribution pipe 25. That is, the inlet side 24a of the cooling water passage 24 is positioned on one side (left side) of the engine 9, and the outlet side 27a of the other cooling water passage 27 is positioned on the other side (right side) of the engine 9.
29 is a radiator, and the side tube 4
is fixed. Inlet 3 of this radiator 29
0 is provided above the radiator 29 on the thermostat 28 side, that is, on the right side, and is connected to the thermostat 28 by a pipe 31.
This pipe 31 passes near the tank rail 3 inside the fuel tank 18. On the other hand, the outlet 32 of the radiator 29 is connected to the distribution pipe 25 at the bottom of the radiator 29.
It is provided on the side or left side and is connected to the inlet of the pump 21 by a pipe 33. The sides of these cooling systems form a substantially inverted triangle as shown in FIG. That is, the pump 21, the thermostat 28, and the radiator 29 form the vertices of an approximately inverted triangle, and are connected by the pipes 26, 27, 31, and 33 so as to have approximately the shortest distance. The thermostat 28 and the pump 21 are connected by a thin pipe (not shown), and when the engine 9 is at a low temperature and the thermostat 28 prevents the cooling water from flowing into the radiator 29, the pump 21 pumps the cooling water. 2
Bypass to 1.

Now, when the temperature of the engine 9 is low, the thermostat 28 prevents the cooling water from flowing into the radiator 29, so the cooling water flows through the pump 21, the pipe 26,
It flows through a circulation path formed by a distribution pipe 25, a pipe 24, an inlet 22, an outlet 23, a pipe 27, a thermostat 28, and a thin pipe (not shown). As the engine temperature increases, the temperature of the cooling water also increases, and the thermostat 28 allows the cooling water to flow into the radiator 29. Therefore, the cooling water is cooled by the radiator 29, enters the pump 21 through the pipe 33, and circulates through each cylinder row 10, 11, through the thermostat 28, and back to the radiator 29.

〔Effect of the invention〕

As explained above, according to the present invention, the cooling water outlet and inlet of the radiator disposed in front of the engine are separated from each other on the left and right, and the engine is disposed so that each cylinder is located at the front and rear, and the radiator The cooling water outlet of the radiator and the inlet side of the cooling water passage that cools each cylinder are arranged on one side, and the cooling water inlet of the radiator and the outlet side of the cooling water passage that cools each cylinder are arranged on the other side. Because they are connected by a tube, the tube connecting the engine and radiator can be shortened.

In addition, the engine is arranged so that each cylinder is placed in the front and rear, and the outlet and inlet sides of the cooling water passages that cool each cylinder are located between each cylinder and on both sides. The valley between the cylinders can be used to simplify cooling water piping.

[Brief explanation of the drawing]

FIG. 1 is a side view of a motorcycle showing an embodiment of the present invention, and FIG. 2 is a plan view showing the cooling system of the engine. 9...Engine, 10,11...Cylinder row, 2
4, 27...Cooling water passage, 24a...Inlet side, 2
7a...Exit side, 29...Radiator, 30...
Inlet, 32... Outlet, 26, 31, 33... Pipe body.

Claims (1)

[Claims] 1 In a motorcycle equipped with a water-cooled V-type engine 9 and a radiator 29 in front of this engine, the cooling water outlet/inlet 32, 3 of the radiator 29
0 are provided spaced apart on the left and right, and the engine is connected to each cylinder 1.
0 and 11 are arranged in front and behind each other, and outlet/inlet sides 27a, 24a of cooling water passages 24, 27 for cooling each cylinder are arranged between each cylinder 10, 11 and on both sides. The cooling water outlet 32 of the radiator 29 and the inlet side 24a of the cooling water passage for cooling each cylinder are arranged on one side and connected by pipe bodies 26, 33, and the cooling water inlet 30 of the radiator 29 and each cylinder are cooled. This is an engine water cooling system for a motorcycle, which is arranged on the other side of the cooling water passageway from the outlet side 27a and connected by a pipe body 31.