JP2518755Y2 - Exhaust silencer for prime mover - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust silencer for a prime mover that silences exhaust gas from a prime mover such as an automobile or a motorcycle.

[0002]

2. Description of the Related Art There is a conventional exhaust silencer for a prime mover in which a sound absorbing material is provided on the outside of a perforated exhaust pipe.
219).

[0003]

However, this conventional exhaust silencer for a prime mover has a problem that it is difficult to muff the sound, and the output of the prime mover is not improved.

The present invention is intended to solve these problems of the conventional exhaust silencer of a prime mover, to improve the muffling, and to improve the output of the prime mover.

[0005]

Means for Solving the Problems An exhaust muffler of this invention the prime mover, Rutotomoni inner provided an inner pipe extending through the inside of the perforated exhaust pipe at a distance between the perforated exhaust pipe and the inner pipe Inner pie at both ends of the pipe
The gap between the exhaust pipe and the multi-hole exhaust pipe is closed , and the exhaust inlets that open on the inlet side are placed in front of and behind the inner pipe so that they protrude inside the inner pipe.
It was provided in parallel a large number of silencing holes in the inner pipe provided with, a further outlet end of the inner pipe
Inner pipe from the point near the center to the end on the outlet side
Taper to the outside of the inner pipe.
An exhaust discharge port opened to the outlet side of the Paipu, provided Rutoto
The inner pipe is provided with a tapered exhaust outlet on the outlet side .

[0006]

In the exhaust silencer of this prime mover, the exhaust gas taken in through the exhaust inlets of the inner pipes which are provided one behind the other and facing each other is efficiently circulated in the inner pipe and the multi-hole exhaust pipe to improve efficiency. The sound is well damped and the sound absorbing material provided outside the perforated exhaust pipe muffles the sound. Further, the exhaust gas collides with the inside of the inner pipe and the outside of the inner pipe and interferes with each other due to the muffling holes provided in the inner pipe at a predetermined angle, so that the exhaust gas is efficiently silenced. And the tapered exhaust outlet of the inner pipe becomes gradually narrower.
Exhaust discharge that is open to the outside
Since there is a mouth, the flow velocity of the exhaust gas from the inside of the inner pipe becomes faster, and the exhaust gas flowing between the inner pipe and the porous exhaust pipe has a negative pressure, so that it flows between the inner pipe and the porous exhaust pipe. Exhaust gas is efficiently extracted
As a result, the residual gas existing in the combustion chamber is efficiently extracted. In this way, the exhaust gas and the residual gas are efficiently extracted, so that the performance of the prime mover is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An exhaust muffler for a prime mover according to the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 to 5, the sound absorbing material 2 is provided outside the porous exhaust pipe 1, and the outer cylinder 3 is provided outside the sound absorbing material 2. When the inner pipe 4 extending through the inside of the perforated exhaust pipe 1 is provided with a predetermined space between the perforated exhaust pipe 1 and inner pipe 4 DOO
Expand both ends of the inner pipe 4
The gap between the pipe 4 and the perforated exhaust pipe 1 is closed and provided.
It The inner pipe 4 on the inlet side (left side in the drawing)
The opened first exhaust air intake port 5 is provided inside the inner pipe 4, and is closer to the center than the first exhaust air intake port 5 and
A second exhaust air intake 6 opened on the inlet side is provided inside the inner pipe 4 at a position at an angle of 180 degrees so as to face the exhaust air intake 5. The inner pipe 4 is provided with muffling holes 7 in parallel at a position with an angle of 90 degrees, one row or six rows or four rows (where the second exhaust air intake 6 exists). Furthermore, it is slightly inside from the outlet side end of the inner pipe 4.
Inner pipe 4 from the center to the outlet end
Bend inward at 4 points to make a taper
Open to the outlet side of the inner pipe 4 on the tapered outer side of the pipe 4.
An exhaust silencer 9 for a prime mover, which is provided with an exhaust outlet 8 which is open, and is provided with a tapered exhaust outlet 10 on the inside of the inner pipe 4 and on the outlet side .

When the exhaust silencer 9 of the prime mover of this embodiment is used by connecting it to the prime mover, the exhaust gas from the prime mover flows into the inner pipe 4, and a part of the exhaust gas flows from the first exhaust intake port 5. It is taken in and rotated between the inner pipe 4 and the porous exhaust pipe 1 to muffle the sound, and is muffled by the sound absorbing material 2. Similarly, the exhaust gas is taken in through the second exhaust inlet 6, is turned between the inner pipe 4 and the porous exhaust pipe 1 to be silenced, and is also silenced by the sound absorbing material 2. Furthermore, the exhaust gas flowing inside the inner pipe 4 and the exhaust gas flowing outside the inner pipe 4 interfere with each other by a number of muffling holes 7 provided at an angle of 90 degrees in the inner pipe 4, so that the exhaust gas is It is muted. Oite the outlet side of the inner pipe 4, open to the tapered outer pipe
Exhaust gas flowing inside the inner pipe 4 by providing the in the exhaust discharge port 8 where the tapered exhaust outlet 10
The exhaust gas flowing between the inner pipe 4 and the porous exhaust pipe 1 has a negative pressure because the flow velocity of the exhaust gas flows faster, and the exhaust gas flowing between the inner pipe 4 and the porous exhaust pipe 1 is extracted. The residual gas in the combustion chamber is also extracted by the force. Since the residual gas in the combustion chamber is extracted, the intake efficiency of the combustion chamber is increased, and the combustion efficiency is increased, so that the performance of the prime mover is improved.

[0009]

EFFECT OF THE INVENTION In the exhaust silencer of the present invention, the exhaust gas taken in through the first exhaust inlet of the inner pipe can be efficiently silenced by being passed between the inner pipe and the perforated exhaust pipe. At the same time, the sound absorbing material provided outside the perforated exhaust pipe can effectively muffle the sound. Exhaust gas can be effectively silenced because the exhaust gas interferes with the inner side of the inner pipe and the outer side of the inner pipe through a plurality of muffling holes provided in parallel with the inner pipe. Further, the exhaust silencer for a prime mover of the present invention has a tapered outer side opening at the outlet side of the inner pipe penetrating therethrough.
Since it provided with tapered exhaust outlet and the exhaust discharge opening that, through
The flow rate of the exhaust gas flowing inside the inner pipe you are
Becomes faster and flows between the inner pipe and the perforated exhaust pipe.
It is possible to draw efficiently the exhaust gas flowing between the inner pipe and the perforated exhaust pipe because the exhaust gas flowing between the inner pipe to be faster than the flow velocity of the exhaust gas and a perforated exhaust pipe is a negative pressure Since the residual gas in the combustion chamber can be drawn out by this drawing force, the combustion efficiency can be improved and the performance of the prime mover can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of the product of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a transverse sectional view of the same.

FIG. 5 is a longitudinal sectional view of the same.

[Explanation of symbols]

 1 Perforated Exhaust Pipe 2 Sound Absorbing Material 3 Outer Cylinder 4 Inner Pipe 5 First Exhaust Inlet 6 Second Exhaust Inlet 7 Muffling Hole 8 Exhaust Discharge Port 9 Exhaust Muffler of Engine 10 Exhaust Outlet

Claims (1)

(57) [Scope of utility model registration request] 1. A exhaust muffler of the engine formed by providing a sound absorbing material on the outside of the perforated exhaust pipe, transmural inside of the porous exhaust pipe
Rutotomoni inner pipe provided with an inner pipe in communication with a space between the perforated exhaust pipe and the inner pipe
At both ends of the
Provided closed, to the inner pipe, the intake <br/> exhaust which opens the inlet side, the noise reduction hole in the inner pipe with tandem, and is opposed provided so as to protrude to the inside of the inner pipe A large number are provided in parallel, and further from the location near the center of the outlet side end of the inner pipe to the outlet side end.
Tapered inner pipe Tapered inner pipe
Outwardly, the exhaust discharge port opened to the outlet side of the inner pipe, arranged in Rutotomoni inner pipe outlet side tapered
Exhaust muffler of the engine, characterized by comprising an exhaust outlet.