JPS5853606B2 - motorcycle engine cooling system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-cooled motorcycle engine cooling system.

When water-cooling a motorcycle engine, the radiator is generally mounted vertically on the front vertical pipe of the vehicle body, in front of the engine mounted at the bottom center of the vehicle body, and the radiator, engine cylinder, and cylinder head are installed vertically, facing forward. are connected by pipes and cooled by circulating cooling water.

In this case, there is an advantage that the radiator is often hit by the wind while the vehicle is running, but since the radiator protrudes from side to side, it is often damaged if the vehicle falls over.

Furthermore, the mud thrown up by the front wheels tends to hit the radiator, causing the radiator to become clogged with mud.

Additionally, some vehicles have a radiator mounted forward on the upper part of the front fork, but in this case there are disadvantages such as poor steering performance.

The present invention has been improved in view of these points, and embodiments of the present invention shown in the drawings will be described below.

An engine 2 is attached to the lower center of the vehicle body 1, a tank 3 is attached to the upper front part of the vehicle body 1, and a seat 4 is attached to the rear side.

A front fork 1 to which a front wheel 6 is attached is attached to a head pipe 5 at the front end of the vehicle body 1.

According to the present invention, a radiator 9 is placed horizontally between the cylinder head 8 of the engine 2 and the tank 3, with the front part inclined downward, and the radiator 8 and cylinder 10 are connected to the radiator 9 and the cylinders of the engine. They are connected by a pipe 11.

As shown in FIG. 2, the tank 3 has a concave lower surface so as to straddle the vehicle body 1, and has a wind guide section 12 at the top of the front fork I.
will be established.

The effect will be explained.

When the motorcycle runs, the running wind passes through the concave part of the tank 3 from the wind guiding part 12 and the like, and hits the radiator 9.

When the running wind passes through the radiator 9 from the upper surface to the lower surface, heat is exchanged and the cooling water in the radiator 9 is cooled.

The cooling water in the radiator 9 is circulated through the pipe 11 to the cylinder 10 and cylinder head 8, and is circulated to the engine 2.
to cool down.

The radiator 9 can be housed inside the tank 3,
Since there is no lateral protrusion, it does not get in the way and will not cause any damage even if it is rolled over.

Moreover, since it is separated upward from the front wheel 6, it is possible to prevent mud from sticking up.

As explained above, the present invention provides a motorcycle equipped with an engine 2 at the lower center of a vehicle body 1, in which a tank 3 is mounted on the front upper part of the vehicle body 1 so as to straddle the tank 3 and a cylinder of the engine 2. A radiator 9 placed horizontally between the head 8 and formed within the width of the tank 3 is disposed with its front part inclined downward, and the radiator 9 is connected to the cylinder 10 of the engine 2 and the cylinder head. 8 are connected to each other by pipes 11, so that when driving, the wind flowing from the upper part of the front fork 7 along the recessed part of the lower surface of the tank 3 passes through the radiator 9 and exchanges heat with the cooling water to cool the vehicle. Not only can the cooling efficiency of the cylinder 10 and the cylinder head 8 be improved through the pipes 11, but also the radiator 9, the pipes 11, etc. can be placed near the engine 2.
Maintenance and inspection become easier, circulation loss of cooling water is reduced, and the center of gravity of the entire vehicle body during driving is lower, so stable running and stable maneuverability can be improved.

Additionally, the radiator can be installed inside the tank and does not protrude to the side, so it will not get in the way or be damaged if it is rolled over.

Furthermore, since the radiator is located far from the front wheels, it is possible to reduce the amount of mud thrown up by the front wheels, which prevents the cooling effect from decreasing due to mud clogging.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a side view, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a plan view. 1...Car body, 2...Engine, 3...
... Tank, 8 ... Cylinder head, 9.
...-Radiator, 10...Cylinder, 1
1...Pipe.

Claims (1)

[Claims] 1. In a motorcycle with an engine located at the lower center of the vehicle body, a tank is installed at the front upper part of the vehicle body so as to straddle the tank, and is placed horizontally between the tank and the cylinder head of the engine, and the width of the tank is A cooling device for a motorcycle engine, characterized in that a radiator formed inside is arranged with its front part inclined downward, and the radiator is connected to a cylinder and a cylinder head of the engine through respective pipes.