JPS62178481A - 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 in an engine cooling system for a motorcycle.

(Prior Art) Conventionally, a radiator used as a cold IJI device especially in a motorcycle having a four-stroke engine has tended to have a larger capacity i because it is necessary to improve the radiator performance as the output of the engine increases.

However, the radiator is generally installed in a restricted space surrounded by the frame in front of the engine, the steering head, the front tires, and the exhaust pipe, and expanding the radiator shape in the width direction of the vehicle body is difficult. There is a limit due to the relationship 1). Therefore, it is desirable to utilize the space as effectively as possible in the longitudinal direction of the vehicle body. However, in the past, the front surface of the radiator was formed flat regardless of the profile of the front tires, and the space in the longitudinal direction of the vehicle body was not always fully utilized.

Another conventional example is one in which a pair of left and right radiators are arranged in a V-shape when viewed from above in the width direction of the vehicle, but in this arrangement, the dimensions of the radiators in the longitudinal direction of the vehicle are large. Therefore, it was difficult to apply it to a four-stroke engine. In addition, some engines are mounted with the engine cylinder tilted forward significantly in order to lower the single core, but in such engine configurations, the space to install the radiator becomes increasingly narrow, and the radiator capacity increases. There is a tendency for an increase in

(Object of the Invention) The present invention was made based on the above-mentioned blue engine, and the radiator capacity is increased by changing the front shape of the radiator to correspond to the profile of the 100-wheel tie A7.
The purpose is to improve its performance.

(Structure of the Invention) The present invention relates to a radiator for a motorcycle that is attached to a frame located in front of an engine, and the radiator body is configured to have a profile in the longitudinal direction of the radiator body corresponding to the profile of the front wheel tie A7 when the front fork is fully compressed. 11 is formed to be larger at both sides in the width direction of the vehicle body and smaller at an intermediate portion in the width direction of the vehicle body.

With this configuration, the limited space for mounting the radiator can be utilized as effectively as possible, and the radiator capacity can be increased.

(Example) An example of the present invention will be described with reference to FIGS. 1 to 3.

A front fork 2 is pivotally supported on a steering head vibe 1, and a front wheel 3 provided with a tire 4 is pivotally supported by the front fork 2. A frame 5 extends rearward from the steering head pipe 1, and this frame 5 includes a main frame 6, a bracket 7 connected to the rear end of the main frame 6, and a lower and front side of the main frame 6 and the bracket 7. It consists of a down tube (frame) 8 that passes through. And these main frame 6, bracket 7,
An engine 9 is mounted in the space formed by the down tube 8 with bolts 10, 11, and 12. A gasoline tank 13 is attached above the main frame 6, and a seat rail 15 from which a seat 14 can be removed is fixed.

A radiator 16 as an engine cooling device is attached to the down tube 8 located in front of the engine 9. It is located in a space surrounded by exhaust vibes 17 and other parts. The width of this radiator 16 when viewed from the vertical direction (above) of the radiator body is large ( The length ρ1 in FIG. 2) is small (length 92 in FIG. 2) at the intermediate portion in the width direction of the vehicle body.

The radiator 16 also includes tanks 18a located at both ends of the vehicle body 1↑J direction and extending vertically, and a plurality of plates (tubes) 1 connected between the left and right tanks 18a.
8b, and fins 18c formed in a wave shape so that wind can pass through between the plates 18b during running. The plate 18b and the fins 18c are attached to the radiator body from the vertical direction (above) as described above.
] is deformed to correspond to the profile of the front tire 4, and can be manufactured into such a shape by t-twisting or pressing. Further, as for the fins 18C, separate fins may be provided in parallel where the width is increased. Note that the cooling water to the radiator 16 is configured to enter from above one tank 18a, pass through each plate 18b, and be led out from the lower end of the other tank 18a.

By configuring the radiator 16 as described above, even if the space for mounting the radiator is narrow, the capacity of the radiator can be increased by effectively utilizing the space near both ends in the vehicle width direction, where the space is relatively large. Figure 2,
The cross-hatched area A in FIG. 3 corresponds to the increase in the radiator container.

In this way, the performance can be improved, and in turn, it is possible to sufficiently respond to an increase in engine output.

Further, the capacity of the tanks 18a on the left and right sides of the radiator 16 is also increased, which can contribute to improving the cold IJL efficiency.

Furthermore, as mentioned above, this is particularly effective in motorcycles in which the engine cylinder is tilted forward.

(Effects of the Invention) As described above, according to the present invention, the width of the vehicle body can be adjusted according to the profile of the front tire when the front fork is fully compressed. By forming the radiator larger on both sides and smaller in the middle, the radiator can effectively utilize the limited space and increase the capacity of the radiator, compared to conventional radiators that are installed flat against the front tire profile. can be increased, and its performance can be improved.

[Brief explanation of drawings]

FIG. 1 is a side view of a main part of a motorcycle equipped with a radiator according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line n-tt in FIG. be. 2...Front fork, 3...Front wheel, 4...Tire, 5...Frame, 8...Down tube (frame), 9...Engine, 16...Radiator. Patent applicant: Yamaha vJ Iso Co., Ltd. No. 2
.

Claims (1)

[Claims] 1. A motorcycle radiator that is attached to the frame located in front of the engine, and the width of the radiator body when viewed from the vertical direction is set on both sides of the vehicle body in the width direction, corresponding to the profile of the front tire when the front fork is at its maximum compression. 1. A radiator for a motorcycle, characterized in that the radiator is larger in the middle part of the vehicle body and smaller in the middle part in the width direction of the vehicle body.