JPS61188286A - Motorcycle exhaust collection structure - 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 (Industrial Application Field) The present invention relates to an exhaust structure for a motorcycle, and particularly in a motorcycle equipped with a multi-cylinder engine, the exhaust pipe connected to each cylinder is connected to one or more exhaust pipes. This relates to an exhaust collecting part for connecting two mufflers.

(Prior Art) A recent trend in motorcycles is to mount a cowling on the front of the vehicle from top to bottom in order to improve stability and aerodynamic characteristics during high-speed driving.

For example, as shown in FIG. 4, three cowls, an upper cowl 2, a center cowl 3, and a lower cowl 4, are attached to the front of a motorcycle l. These cowls 2.3.4
Fi is formed separately, connected to each other, and detachable from the vehicle body. 5 is the vehicle body frame (not shown)
6 is an exhaust pipe connected to the engine 5, which is connected to the collecting part 7,
This gathering portion 7 is connected to a muffler 8. 9 is a fuel tank, and 10 is a seat.

The above-mentioned gathering portion 7tj: is integrated with the exhaust pipe 6 and the muffler 8, and is fixed to the vehicle body frame together with these, and the lower cowl 4 is fixed to the vehicle body frame so as to cover and wrap this gathering portion 7. .

(Problems to be Solved by the Invention) However, in the case of the above configuration, a gap is required between the lower cowl 4 and the collecting part 7, and if the volume of the collecting part 7 is to be increased, the lower cowl 4 Of course, it also has to be made larger. As a result, the minimum ground clearance is low and the protrusion to the left becomes large, making it impossible to increase the bank angle.

Conversely, if the minimum ground clearance is to be increased, the volume of the gathering portion 7 must be reduced, resulting in a significant drop in exhaust performance.

(Object of the Invention) The present invention has been made in order to eliminate the various drawbacks mentioned above, and provides a structure of an exhaust collecting part that can increase the volume of the collecting part, as well as increase the minimum ground clearance and bank angle. This is what I am trying to do.

(Means for Solving the Problems) (1) This is a motorcycle in which a cowling is attached to the front of the vehicle from the top to the bottom.

(2) The above-mentioned cowling is divided into a plurality of upper and lower cowls, and the lowermost cowl is formed by an exhaust collection part.

The exhaust collecting part forms the lower cowl, so what is the upper cowl and the exhaust collecting part (lower cowl)?

The connections are flush, allowing the vehicle to run with as little air resistance as possible, just like before.

Since the exhaust collecting part is exposed to the outside, the collecting part is sufficiently air-cooled and the back pressure on the engine can be reduced.

(Example) Hereinafter, an example of the exhaust gas collecting portion structure according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the embodiment, and the same reference numerals as in FIG. 4 indicate the same parts, and detailed explanation will be omitted. In the figure, 11 is an upper cowl, which is formed by upper cowl lla and center cowl llb, and o12, which is attached to the front of the motorcycle l, is an exhaust collecting part.
It is fixed below the engine 5 at approximately the center of the vehicle body, and both left and right outer surfaces serve as lower cowls, which are connected to the upper cowl 11.

Further, the exhaust collecting portion 12 is connected to an exhaust pipe 13 at the front and a muffler 8 at the rear, and these are integrally fixed to the vehicle body frame.

FIG. 2 is a front view of the exhaust collecting section 12 and the exhaust pipe 13 as seen from the front of the vehicle.
(indicated by a dashed line in the figure). Further, the sides of the exhaust gas collecting portion 12 are inclined downwardly from the vehicle body, and together with the upper cowl 11, are approximately egg-shaped to reduce air resistance during running.

FIG. 3 tI'i is a drawing seen from the side of FIG. Connected to cowl.

(Effects of the Invention) As detailed above, the present invention brings together exhaust pipes from each cylinder in a multi-cylinder engine at an exhaust collecting part, and forms a cowling together with the upper cowl by using the outer surface of the exhaust collecting part as a lower cowl. This increased pressure made it possible to ensure sufficient minimum ground clearance even if the volume of the exhaust collection section was increased. As a result, maneuverability during driving is significantly improved, and even when driving at high speeds, air resistance is low and stable driving is possible.

In addition, the exhaust collecting section is always exposed outside the vehicle body.

Since the engine is air-cooled by the wind while the vehicle is running, it is now possible to lower the exhaust temperature and significantly improve engine output performance. Furthermore, the number of parts is reduced, which also has the effect of reducing weight.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of a motorcycle equipped with an exhaust collecting section according to the present invention, Fig. 2 is a front view showing only the upper cowl and the exhaust collecting part, Fig. 3 is a side view of Fig. 2, and Fig. 4 1 is a schematic side view of a motorcycle equipped with a conventional exhaust collecting section. l...Motorcycle ll...Upper cowl 12
...Exhaust gathering part (lower cowl) 13...Exhaust pipe

Claims (1)

[Claims] A motorcycle having a cowling mounted on the front surface of the vehicle from the top to the bottom, wherein the cowling is divided into a plurality of upper and lower cowls, and the lowermost cowl is formed by an exhaust collecting part. Exhaust assembly structure.