JPS63134809A - Motorcycle - Google Patents

Abstract

PURPOSE:To protect extended portions and improve the appearance thereof by extending the rear end portions of the exhaust pipes to the outer side of a motorcycle at the center portion of its body and by covering the extended portions with covers continued to mufflers. CONSTITUTION:The rear end portions of exhaust pipes 171, 172 having their front end portions connected to the exhaust ports of respective cylinders are extended toward the outer side from the center portion of the motorcycle body. These extended portions are covered with covers 191 and 192 continued to the front ends of mufflers 181 and 182. Extended portions can be improved in their appearance as well as being protected from a rebound rock, etc., by this method.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a motorcycle.

(Prior art and its problems) Generally, the length of the exhaust pipe directly affects the output of the engine, so it is necessary to make the length as commensurate with the output as possible. By the way, in motorcycles equipped with large-displacement V-type engines, the distance between the rear-bank engine and the rear wheel is short, so the length of the rear-bank engine's exhaust pipe is simply extended rearward. It is not possible to make it longer. Therefore, by bending the rear end of the exhaust pipe in the space between the rear bank engine and the rear wheel pivot and extending it outward from the center of the vehicle body, the length of the exhaust pipe can be increased. is prolonging.

In this way, when the rear end of the exhaust pipe extends outward from the center of the vehicle body, the extended portion is exposed, and there is a risk of damage due to stone splashing. The extended portion is not plated or the like, and unlike the part of the muffler, it has a small diameter and lacks continuity with the part of the muffler, so it is unsightly in terms of appearance if the extended part is exposed.

(Object of the Invention) The present invention has been made in view of the above circumstances, and the rear end of the exhaust pipe is extended outward from the center of the vehicle body, and the length of the exhaust pipe is adjusted to the engine output. To provide a two-wheeled motor vehicle which can protect the extended portion from stones and the like and has a good appearance while having a length commensurate with the above.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention aims at directing the rear end of the exhaust pipe, the front end of which is connected to the exhaust port of the engine, outward from the center of the vehicle body. The muffler is made to extend, and the extended portion is covered with a cover that is continuous with the muffler.

(Function) Since the rear end of the exhaust pipe extends outward from the center of the vehicle body, the length of the exhaust pipe increases by the amount of extension. Further, the extending portion is protected by a cover that is continuous with the muffler, and is not exposed, so it has a good appearance.

(Example) An example of the present invention will be described below based on the drawings. 1st
The figure is a side view of the motorcycle of the present invention, and FIG. 2 is a plan view thereof. In both figures, 1 indicates the entire motorcycle, and 2 indicates its body (frame). The vehicle body 2 includes a head pipe 3,
It has main pipes 4 and 1 whose front ends are connected to the upper part of the rear side of the head pipe 3, and a down pipe 5 whose front end part is connected to the lower part of the rear side of the head pipe 3. 4 and the rear end of the down pipe 5 are connected to each other by a vertical vibro.

A front end of a seat rail 7 is connected to the rear end of the main pipe 4, and a substantially intermediate portion in the longitudinal direction of the seat rail 7 and a rear end of the down pipe 5 are connected by a reinforcing pipe 8. has been done.

A front wheel 12 is supported on a fork 10 connected to a handle 9 fitted to the head pipe 3 via a front suspension (front cushion) 11. Further, a rear wheel 14 is supported at the rear end of the fork 13, the front end of which is pivotally supported near the rear end of the down pipe 5, and the rear wheel 14 and the seat rail 7 are approximately parallel to each other in the longitudinal direction. A rear suspension (rear suspension) 15 is installed between the intermediate portion and the intermediate portion.

For example, a V-type four-cylinder engine 16 is mounted in a space surrounded by the main pipe 4, down pipe 5, and vertical vibro.

Exhaust pipes (only the left side is shown) 17, . The rear end portion of the exhaust pipe 172 extends outward from the central portion of the vehicle body 2 as shown in FIGS. It has become. The exhaust pipes 171, 17. The extending portions are covered by covers 191.19□ whose rear ends are connected by welding to the front ends of mufflers 18□ and 18□, two of which are provided at the rear left and right sides of the vehicle body 2, respectively. has been done.

These covers 19□, 19□ have their back parts 19. as shown in FIGS. 5 and 6. ' , 19□' is the welding allowance,
By welding these back portions 191' and 19□', a cylindrical planar shape having a circular arc shape with a predetermined curvature is formed. The cover 191° 19□ has a double wall structure by providing inner cylinders 26□, 262 of similar shapes inside thereof, and thereby the exhaust pipe 171.
Direct connection with cover 191 and 17□ prevents the surface of cover 191 and 19□ from discoloring even at high temperatures.

In addition, the inner cylinder 261.26□ also has its back portion 26□″
, 262' are the welding allowances, and these back parts 26□', 2
By welding 6□', the planar shape is made into a cylindrical shape having a circular arc shape with a predetermined curvature. These inner cylinders 261
, 26□ and the cover 19. ．． There is a gap 27□ between the inner peripheral surface of 19□.

There are 27□. The rear ends of the covers 19□, 19□ are connected to the muffler 18. ．． 18□, and the butt portion 281.28□ is used as a welding margin, and this butt portion 28. ．．・By welding 28□, cover 19. ．． 19□ and mufflers 18□ and 182 are connected. These left and right mufflers 18□, 1
82 are arranged one above the other, and gradually slope upward from the front end toward the rear end. The exhaust pipes 17□, 172 of each cylinder on the left side of the front and rear banks of the engine 16 are connected to the collector pipe 17. (See Figures 3 to 5). Furthermore, the exhaust pipes 171.17□ of the right-hand cylinders of the front and rear banks of the engine 16 are also gathered together via a collecting pipe 173 at an upstream portion near the extending portion thereof. Furthermore,
In order to stabilize the engine performance in the low speed range, the collecting parts of the exhaust pipes 17□, 17□ on both sides are communicated with each other via a communication pipe 20 to increase the volume of the collecting part. .

On the left and right side surfaces of the vehicle body 2, the vertical vibro, seat rail 7, rear suspension 15, and upper muffler 1 are installed.
Side covers 21 and 21 are provided at the portions surrounded by 81 and 81, respectively.

In addition, in FIGS. 1 and 2, 22 is a fuel tank, 23 is a seat, 24 is a front fender, 25 is an under cowl, 33 is a main step for the driver, 34 is a pillion step for a passenger, and FIG. and 29 in Fig. 6 is the inner cylinder 26.
The drain hole 30' provided on the lower surface of the 0,262 (the inner cylinder 26□ side is not shown) is connected to the lower outer peripheral edge of the support wall 32 that supports the pipe 31 inside the muffler 181.18□ and the muffler 18.
This is a drainage hole provided between the lower part of the inner peripheral surface and the diameter of 1°18□.

(Effects of the Invention) As detailed above, in the motorcycle of the present invention, by extending the rear end of the exhaust pipe outward from the center side of the vehicle body, the length of the exhaust pipe can be adjusted to reduce the engine output. Although the length of the exhaust pipe is commensurate with the size of the exhaust pipe, the extending part of the exhaust pipe is covered with a cover that is continuous with the muffler, so it is protected from flying stones, etc., and has a good appearance. It is.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of the motorcycle of the present invention, FIG. 2 is an open plan view, FIG. 3 is an enlarged side view of main parts with a part cut away, and FIG. The figure is a partially cutaway view of Fig. 3 in the direction of the ■ arrow, Fig. 5 is a partially cutaway view of Fig. 3 in the direction of the ■ arrow, and Fig. 6 is a sectional view taken along the VI-VI line of Fig. 4. It is. 1... Motorcycle, 2... Vehicle body, 16... Engine, 171.172... Exhaust pipe, 18□
, 18□...Muffler, 191.19□...Cover.

Claims (1)

[Claims] 1. The rear end of the exhaust pipe, whose front end is connected to the exhaust port of the engine, extends outward from the center of the vehicle body, and the extended part is covered with a cover that is continuous with the muffler. A motorcycle featuring: