JPS628879A - Cooling structure of radiator for 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 relates to a radiator cooling structure for a motorcycle equipped with a water-cooled engine.

(Prior Art) Motorcycles equipped with water-cooled engines are put into practical use, and such types are equipped with a radiator for cooling engine cooling water, and the radiator is generally provided behind the front wheels and in front of the engine.

(Technical Problems to be Solved by the Invention) In the above-mentioned conventional technology, since the radiator is located in the front, warm air after cooling flows around the legs of the rear passenger, causing the legs to become hot.

The present invention has been made to solve the above technical problems,
The object of the present invention is to provide a radiator cooling structure for a motorcycle that prevents hot air from the radiator from affecting the sides of the occupant.

(Means for solving the technical problems) The means for solving the above technical problems is to provide a radiator in front of the engine in a motorcycle equipped with a horizontally opposed multi-cylinder water-cooled engine and a radiator, and to is narrow in the middle between the left and right cylinders of the engine, and is provided with a duct whose rear part is bent rearward and downward, preferably a fan for discharging hot air to the rear is provided in the middle of the duct, and preferably a fan is provided in the middle of the duct. Air cleaners and fuel supply devices for each cylinder are provided on the left and right outer cylinders.

(Effects of the above means) According to the above means, the hot air is discharged to the rear and downward direction of the occupant, and does not flow around the legs of the occupant, and the space above the left and right cylinders is effectively used as a space for installing auxiliary equipment. can do.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a side view of a motorcycle (1), with a frame (
2) Front wheel (3) via the Herad tube (not shown) at the front end
The front fork (4) supports the front fork and is steered by the handlebar (5). An engine (8) is mounted on the front lower part of the frame (2), and a fuel tank (7) is mounted on the upper part.A seat (8) is attached to the rear of the tank, and a drive wheel is mounted at the rear of the frame. A rear wheel (8) is provided. The seat (8) is a tandem type with a driver seat (8a) and a paracanger seat (8b), and the rear wheel (9)
There are side bags (10) on the upper left and right sides of the
1) and (12) are steps for the driver and parasensor.

The engine (8) has a case (8a) such as a crank case and a transmission case in the middle part, and a cylinder part (8b),
(8b) is a horizontally opposed four-cylinder water-cooled engine that protrudes to the left and right, and the exhaust pipe (13) extends downward and rearward from each cylinder of the left and right cylinder portions (6b).

The front part of the frame is covered with a fairing (14), and the front part (14a) of the fairing (10) is covered with a front wheel (3).
The rear part (14b) faces the left and right cylinder parts (13b), (8b) of the rear engine (8) of the front wheels (3), and the windshield (15) is placed above the front part (14a).
A headlight unit (1B) is provided at the front, blinker units (17) are provided above the left and right sides of the headlight unit (1B), and mirrors (I8) are provided on the left and right sides of the windshield (work 5).

At the front or upper front of the engine (8) is a radiator (
1B), and the radiator (13) is a left and right split type in the example, and the left and right radiators are single units (191),
(191) is provided with the outer end facing forward and the inner end facing slightly rearward, and such single units (1131) and (191)
The front surface (191a) faces an opening (141) provided at the rear lower front surface of the fairing (10).

A duct (20) is provided at the rear of the radiator (19), and the duct (20) has a wide front part (2Oa) and a front end (20b) on the outside of each of the left and right units (191) and (191).
facing, forming a funnel shape at the rear, the middle part (20C) is narrow and located above the left and right cylinder parts (8b), (8b), with a symmetrical diagonal wall (20d) between them. ,
From the rear part of the intermediate part (20C), which is closed by (20d), a rear part (2oe) branches left and right and extends backward and downward, forming discharge parts (2or) and (2of), and a discharge part (20f).
is the seat (8) behind the case (6a) of the engine (6).
The middle part (20c) of six or more ducts (20) facing downward
) is provided with an exhaust fan (21).

The left and right cylinder parts (13b) and (8b) of the engine (6) are connected to the inside and outside of the intermediate part (20c) of the duct (2G).
) are individually provided with air cleaners (22), (22) and carburetors (23), (23), and the fuel supply system composed of these is divided into left and right parts.

In the above, cooling air is taken in from the opening (141), and the cooling air is taken in from the single unit (191), (1) of the radiator (18).
91), the heat is exchanged through the duct) (20), the fan (21) in the middle part sucks and blows air backward, and the exhaust part C2Of>, C2Of> is sent to the rear of the engine below the seat (8). The warm air is discharged downward and does not flow around the passenger's legs.

Although the embodiment has been described above as a horizontally opposed multi-cylinder engine, it can also be implemented in an engine that is V-shaped in front and has obtuse angles between the left and right cylinder sections and has a large lateral tilt, and the present invention includes such an embodiment in its gist. .

(Effects of the Invention) As is clear from the above, according to the present invention, hot air is prevented from being discharged around the occupant's legs, and the hot air is prevented from affecting the occupant, and the exhaust air is branched to the left and right in the embodiment. The exhaust structure is advantageous in relation to the vehicle body, and since the duct extends rearward using the space between the left and right cylinders, installation space can be easily secured, and By arranging the vaporizer and air cleaner on the section, these can be arranged rationally while making effective use of space.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention.
2 is a side view of the motorcycle, FIG. 2 is an explanatory cross-sectional plan view of the cooling structure, and FIG. 3 is a perspective view thereof. In the drawings, (1) is a motorcycle, (6) is an engine, and (6) is a motorcycle.
b) is the cylinder part, (!9) is the radiator, (20) is the duct, (21) is the fan, (22) is the air cleaner,
(23) is a carburetor forming a fuel supply device. Figure 2

Claims (4)

[Claims] (1) In a motorcycle equipped with a horizontally opposed multi-cylinder water-cooled engine and a radiator, the radiator is provided in front of the engine, and behind the radiator it narrows at the midpoint between the left and right cylinders of the engine, and the rear A radiator cooling structure for a motorcycle characterized by a downwardly bent duct. (2) The radiator cooling structure according to claim 1, wherein a fan for discharging hot air is provided in an intermediate portion of the duct. (3) The radiator cooling structure according to any one of claims 1 and 2, wherein the rear part of the duct branches left and right from the middle part. (4) The radiator according to any one of claims 1, 2, and 3, wherein an air cleaner and a fuel supply device for each cylinder are disposed on the left and right cylinders of the engine on both outer sides of the intermediate portion of the duct. Cooling structure.