JPS6079113A - Exhaust device for three-wheeled vehicle - Google Patents

Abstract

PURPOSE:To obtain an exhaust device which is short in the direction of advance of a vehicle and which may be also satisfactorily settled in the transverse direction of the vehicle, in which an engine is installed in a vehicle body space between rear wheels, by providing a plurality of expansion chambers in a muffler casing in a direction at a right angle to the advance direction of the vehicle. CONSTITUTION:A muffler 10 is formed such that first through third expansion chambers 13 through 16 are defined in a cylindrical muffler casing 11 by means of plates 12, 13. Further, an exhaust manifold chamber 18 is formed along the peripheral wall of the muffler casing 11 by a partition plate 17. These chambers 14 through 16, and 18 are communicated together by means of pipes 19 through 22, and are also communicated to the ambinet air, and the muffler 10 is laid in the rear of a V-type engine 30 so that the axis of the muffler casing 11 extends in parallel with the axles of the vehicle. Further, exhaust pipes 31, 32 which are connected at their one end respectively to the front and rear cylinders 30a, 30b of the V-type engine 30, are connected at their other end to inlet ports 33 provided in the peripheral wall of the muffler 11.

Description

[Detailed description of the invention] The present invention relates to an exhaust system for a tricycle.

BACKGROUND ART Conventionally, silencing of exhaust gas has been an important problem in internal combustion engines and the like, and a muffler has been installed in the exhaust system to solve this problem.

Incidentally, in recent years, small-sized automatic tricycles as shown in FIG. 1 have appeared on the market, and demand is increasing.

In such a tricycle, there is one front wheel in front.
Generally, a handle 2 for changing direction is connected to the handle. In such a tricycle, a drive mechanism such as an engine is collectively loaded between two wheels 4 provided behind a seat 3. Therefore, the exhaust system associated with this is also loaded at the rear of the vehicle body 5, and is necessarily required to be compact.

In this case, conventionally used exhaust systems have a structure in which the expansion chambers of the muffler are arranged parallel to the vehicle traveling direction, and the exhaust gas is discharged rearward.

Therefore, in such a tricycle, the muffler protrudes rearward and becomes long in the direction of travel of the vehicle.

SUMMARY OF THE INVENTION In view of these conventional problems, it is an object of the present invention to provide an exhaust system that is short in the direction of travel of a vehicle, and at the same time fits well in the lateral direction of the vehicle.

That is, the above object is achieved by arranging a plurality of expansion chambers perpendicular to the direction of travel of the vehicle and connecting these expansion chambers with pipes to form a muffler.

Hereinafter, the present invention will be described in detail based on the drawings.

FIG. 2 is a perspective view showing an embodiment of the present invention.

10 is a muffler, and this muffler 10 defines the inside of a cylindrical muffler case 11 by plates 12 and 13, and includes a first expansion chamber 14, a second expansion chamber 15, and a third expansion chamber 1.
6 are arranged in a row. Furthermore, this muffler 10
An exhaust collection chamber 18 defined by a plate 17 is provided along the peripheral wall of the muffler case 11. The exhaust gas collection chamber 18 and the first expansion chamber 14 are connected by a pipe 19, the first expansion chamber 14 and the third expansion chamber 16 are connected by a pipe 20, and the third expansion chamber 16 and the second expansion chamber 16 are connected by a pipe 20. Expansion chamber】
5 are connected by a pipe 21, and the pipe 22 communicates the second expansion chamber 15 with the outside air.

This muffler 10 is installed at the rear of the ■-type engine 30 so that the axis of the muffler case 11 is parallel to the axle, as shown in No. 3-. That is, the expansion chambers 14°15, 16
is arranged perpendicular to the direction of vehicle travel.

Then, the front cylinder 30a of the ■ya engine 30 (3
) can.

and rear cylinder 30b, and the other end of 32 is connected to an inlet port 33 provided on the peripheral wall of muffler case 11, and cylinder 30a,
The exhaust gas discharged from 30b is temporarily converged in the exhaust gas collection chamber 18.

In this muffler 10, the exhaust gas converged in the exhaust gas collection chamber 18 is guided to the first expansion chamber 14 by the pipe 19,
Next, after passing through the third expansion chamber 16 via the pipe 20, it is introduced into the second expansion chamber 15.

The exhaust gas that has been sufficiently muffled through these processes is discharged to the atmosphere through the pipe 22.

Therefore, in this embodiment, the exhaust pipes 31 and 32 can be easily introduced, the muffler itself has few irregularities, the muffler space can be easily provided, and the layout is easy.

As explained above, according to the present invention, by arranging the muffler expansion chambers attached to the vehicle body at right angles to the vehicle traveling direction, the muffler can be made compact with respect to the vehicle traveling direction. Furthermore, it is possible to make the vehicle itself more compact (4)

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional tricycle, FIG. 2 is a perspective view of a muffler according to the present invention, and FIG. 3 is a side view of a tricycle equipped with a muffler according to the present invention. 10...muffler, 11...muffler case, ]4...
First expansion chamber, j5... Second expansion chamber, 16... Third expansion chamber, 19°20, 21, 22... Pipe. Applicant Suzuki Motor Co., Ltd. (5)

Claims (1)

[Claims] In an exhaust system for a tricycle with an engine mounted in the body space between the rear wheels, a plurality of expansion chambers are arranged in a row perpendicular to the direction of vehicle movement within the muffler case, and these expansion chambers are connected by pipes. An exhaust system for an automatic tricycle, characterized in that the exhaust system is connected to the exhaust system.