JPS5911829Y2 - motorcycle front cowling - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a front cowling of a motorcycle.

Motorcycles used at high speeds, such as in road races, are designed to reduce wind resistance by covering the front part of the body and the engine with a front cowling.

Even in that case, in front of the engine on the front cowling,
A cooling air inlet is provided, and the radiator and cylinder placed at the rear of the vehicle are cooled by the air flow from the vehicle.

This cooling air cools the radiator and cylinder and then escapes to the rear, but some of it stays inside the front cowling and changes the pressure near the carburetor installed on the side of the cylinder, or changes the temperature. may increase.

As a result, the air-fuel ratio setting in the carburetor may change, causing fluctuations in engine performance.

This idea has been improved to avoid this problem.
Embodiments of the present invention shown in the drawings will be described below.

The motorcycle has an engine 2 mounted in the lower center of a vehicle body 1.

The front cowling 3 reduces wind resistance by covering the front part of the vehicle body 1 and the engine 2. A cooling air inlet 4 is provided in the front part of the front cowling 3 in front of the engine 2. A radiator 5 and a cylinder 6 are arranged at the rear of the vehicle, and these are cooled by being exposed to the running air that enters from the cooling air inlet 4.

Therefore, in the present invention, the left and right side walls 7 of the cooling air inlet 4 of the front cowling 3 are extended rearward, and these extended left and right side walls 7 are connected to the cylinder 6 and the carburetor installed outside the cylinder 6. 8, and the cylinder 6 and the carburetor 8 are partitioned off by the left and right side walls 7.

Next, the operation of the above embodiment will be explained.

Traveling air enters from a cooling air inlet 4 provided on the front surface of the front cowling 3, flows rearward, hits the radiator 5 and cylinder 6, cools them, becomes hot air, and flows further rearward.

In this case, since the left and right side walls 7 extend rearward, the hot air flows rearward inside the left and right side walls 7.

Since the carburetor 8 is located outside the left and right side walls 7 in a bag-shaped part inside the front cowling 3, it is less affected by hot air, can maintain a normal atmosphere, and adjust the air-fuel ratio. This causes little change and allows the engine to operate normally.

As explained above, this idea covers the front part of the car body and the engine part with the front cowling, and the left and right side walls of the cooling air inlet provided in front of the engine in the front cowling are extended rearward. It is inserted between the engine cylinder and the carburetor installed on the outside of the cylinder, and the cylinder and carburetor are separated by the left and right side walls, so the running air that enters from the cooling air inlet is routed through the radiator. After cooling the cylinder, it passes through the inside of the left and right side walls and exits to the rear.

Therefore, the vicinity of the carburetor on the outside of the left and right side walls is maintained at a normal atmosphere, and there are few changes in pressure and temperature, so there is also little change in the air-fuel ratio, and the engine can be operated normally.

In addition, the front cowling has the left and right side walls behind the cooling air inlet extending rearward as one unit, so there is no increase in work effort when installing and removing it, there is no increase in the number of parts, and it can be made cheaper and lighter. It has various effects.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, with Figure 1 being a side view, Figure 2 being an enlarged side view of the main part with the front cowling cut away, and Figure 3 being an enlarged plan view of the main part crossing the front cowling. be. 1...Car body, 2...Engine, 3...
...Front cowling, 4...Cooling air inlet, 6...Cylinder 7...Left and right side walls,
8... Vaporizer.

Claims (1)

[Scope of utility model registration request] In a vehicle in which the front part of the vehicle body and the engine part are covered by a front cowling, the left and right side walls of the cooling air inlet provided in front of the engine in the front cowling are extended rearward, and a A front cowling for a motorcycle characterized by being inserted between a cylinder and a carburetor, and partitioning the cylinder and carburetor with left and right side walls.