JPS61287879A - Cooling device for fuel feeder in motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention particularly relates to a cooling device for a fuel supply system in a motorcycle equipped with a water-cooled horizontally opposed engine.

(Prior art) In large motorcycles equipped with water-cooled horizontally opposed engines, radiators are installed approximately above the front of the left and right cylinders, and the cooling air from the left and right radiators is directed toward the vehicle body. Air guides are also provided to allow the air to flow in the opposite directions, and a fuel supply device such as a carburetor is provided above the central crankcase portion.

(Problem to be Solved by the Invention) By the way, if there is no air guide for the radiator, the hot air that has passed through the radiator will hit the fuel supply device located at the rear intermediate part of the left and right radiators, which will reduce the heat effect. There's a problem. In addition, by providing an air guide to release the warm air to the sides of the vehicle, the running air will only flow into the fuel supply system from the relatively small space between the left and right radiators.
There is a problem of insufficient cooling for the fuel supply system.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cooling device that can sufficiently cool a fuel supply device disposed above the crankcase of a water-cooled horizontally opposed engine in a motorcycle employing the above arrangement. is to provide.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides left and right cylinder parts (3) of a water-cooled horizontally opposed engine (2), and a radiator (14) located approximately in the front and upper part of (3). (14) are respectively arranged, and the fuel supply device t(1) is placed above the central crankcase part.
7) in a motorcycle equipped with a fuel supply device (1).
It has a cooling air intake (22) that surrounds the left and right radiators (14) and opens between the left and right radiators (14), and also has a cooling air outlet that opens at least substantially rearwardly and downwardly of the rider seat (8). An air duct (21) having an air duct (21) is provided, and a cooling fan (2B) is further provided to force the cooling air inside the air duct (21) to flow backward.

(Function) Since the fuel supply device (17) is surrounded by the air duct (21), it is not affected by heat from the radiators (14), (14), and the radiator (14), (14) is protected by the cooling fan (2B). (14) Since sufficient air volume is actively taken into the air duct (21) from the space between the
Sufficient cooling can be achieved by forcibly cooling the fuel supply device (17). Further, the cooling air outlet (25) is located at least at the rear and lower part of the rider's seat (8).

It is possible to avoid hot air after cooling from flowing to the rider's legs, etc.

(Example) Examples will be described below based on the accompanying drawings.

Fig. 1 is a side view of the motorcycle, and Fig. 2 is a schematic perspective view of the main parts of the cooling system.In the middle of the body frame (1) is a water-cooled horizontally opposed four-cylinder engine (2). A dummy tank (6) is placed on the front part of the frame (1) above the engine (2), and a dummy tank (6) is placed on the front part of the frame (1) above the engine (2).
) A tandem seat (7) is placed on the 1& section. A fuel tank (9) is disposed below the rider's seat (8) in front of the seat (7), and both lower sides of the rider's seat (8) are covered with side covers (11).

In addition, the steering support part at the front upper part of the frame (1) is covered with a front cowl (12), and the drive shaft (5) extends from the transmission case (4) at the rear of the engine (1), and the rear wheel ( 13) is driven by a shaft drive system.

Two-split radiators (14), (14) are disposed approximately in the upper front of the left and right cylinder parts (3), (3) of the engine (2), each having two cylinders, and the radiator (14) are stored in the front cowl (12), and electric cooling fans (15), (15) are arranged behind each radiator (14), (14), respectively.
Cooling air is provided by an air guide (
1G).

(16), they are discharged to the sides of the vehicle body.

Furthermore, above the central crankcase part of the engine (2),
At the rear intermediate portions of the left and right radiators (14), (14): In other words, at the rear intermediate portions of the left and right air guides (1e) and (is), there is a cab chamber (17) that forms one of the fuel supply devices.
will be placed.

In the above, the cooling air intake (22) surrounds the cab chamber (17) and opens between the left and right radiators (14), and passes through the -side of the fuel tank (9) and thereafter. An air duct (21) having a cooling air outlet (25) opening toward the outside is provided.

Specifically, as shown in Figure 3, the air duct (21)
The front part of the left and right radiator air ducts (1B), (1
Continuing with B), its front part is a radiator (+4), (14
), a cooling air intake (22) is opened in between, and behind it is a large volume part (23) covering the cab chamber (17) with a predetermined space, and this large volume part (23)
) - forms a straight duct part (20) that is biased to one side and located on the side of the fuel tank (8).

The rear part of this straight duct part (20) forms a cooling air outlet (25) that is slightly bent toward the rear of the fuel tank (3).
This discharge port (25) faces the rear and lower part of the rider's seat (8).

(21) An electric cooling fan (26) is installed at the rear cooling air outlet (25) to force the cooling air to flow rearward.

In this way, the cab chamber (17) is arranged above the central crankcase part of the water-cooled horizontally opposed engine (2).
is surrounded by the radiators (14) on the front left and right, and the air duct (21) separated from the radiators (14), so let's assume that the air guides (16) for the radiators (14), (14),
Even without (1B), the influence of heat from the radiators (14), (14) on the cab chamber (17) can be prevented.

Inside the air duct (21), there are left and right radiators (14) and (1) in the front part driven by a cooling fan (26).
4) A sufficient amount of cooling air is sucked in from the intake port (22) that opens into the space between the cab chambers (
17) Since the air is forced to flow through the surrounding area toward the rear exhaust port (25), the cab chamber (17) can be actively and sufficiently cooled.

Also, since the cooling air outlet (25) of the air duct (21) faces at least the rear and lower part of the rider's seat (8), it is possible to avoid hot air after cooling from flowing into the rider's legs, etc.! Wear.

Incidentally, the air duct may be a single blow-molded duct or a flexible circular pipe duct, or the duct space may be formed from vehicle body components such as a frame.The fuel supply device is limited to the cab chamber only. Of course, this is not something that can be done.

(Effects of the Invention) As described above, according to the present invention, the fuel is disposed at the rear intermediate portion of the radiator, which is disposed approximately at the upper front of the left and right cylinder sections of the water-cooled horizontally opposed engine mounted on a motorcycle. An air duct is provided that surrounds the supply device and has a cooling air intake that opens between the left and right radiators, and a cooling air outlet that opens at least approximately rearwardly and downwardly of the rider's seat. Since a cooling fan is provided to blow the air backwards, the fuel supply device can be sufficiently cooled, and at the same time, hot air after cooling can be prevented from flowing toward the rider's legs and the like.

[Brief explanation of the drawing]

FIG. 1 is a side view of the motorcycle, FIG. 2 is a schematic perspective view of the main parts of the cooling device, and FIG. 3 is a plan view thereof. In the drawing, (2) is the horizontally opposed engine, (3) is the cylinder part, (8) is the rider's seat, (9) is the fuel tank, (12) is the front cowl, (10 is the radiator, (
16) is the air guide, (17) is the fuel supply device, (2
1) is F duct, (22) is cooling air intake, (25)
is a cooling air outlet, and (2B) is a cooling fan.

Claims (1)

[Claims] In a motorcycle equipped with a water-cooled horizontally opposed engine, a radiator is placed almost above the front of the left and right cylinders, and a fuel supply device is placed above the central crankcase. An air duct having a cooling air intake opening between the left and right radiators and a cooling air outlet opening at least approximately rearwardly and downwardly of the rider's seat is provided, and the cooling air in the air duct is forced to flow. 1. A cooling device for a fuel supply device in a motorcycle, characterized in that a cooling fan that flows backward is provided.