JPH09329012A - Ecology muffler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To muffle noises and to reduce exhaust resistance in a muffler by performing the tuning of the frequencies of the sounds with the inner structure of the muffler. SOLUTION: In this muffler, noises are muffled and exhaust resistance is reduced by combining the length and bigness of the tuning pipes 4, 5 mounted to the partition walls 1, 2, 3 and the volume of expansion rooms 7, 8, 9 in the muffler to tune the frequencies of the sounds without using a muffling material or a special mechanism for a muffler, whereby sufficient torque is realized and the intrinsic properties and improved performance of the engine which have not been obtained hither to are realized. Since the structure is simple, the muffler is made compact and lightweight and improves movability, ecology and safety.

Description

Detailed Description of the Invention

Without using silencer or special mechanism for silencer,
The internal structure is the tuning of the sound by the combination of the length and the volume of the pipe in the partition wall inside the silencer, and it is possible to obtain sufficient torque by effectively reducing the noise and exhaust resistance to the extent that it can be obtained. The original engine characteristics and performance that could not be achieved are realized.

FIELD OF THE INVENTION Muffler (silencer)

[Prior art]

[0001] A conventional muffler silencer has been muffled by wrapping it up, depending on the meaning of the muffler. In the case of 4 cycles, since it is a collective sound of low frequency compared to 2 cycles, it wraps the outside so that the sound does not escape to the outside, but from the internal structure perspective, the passage is long and the sound pressure is lowered in a maze and punching is performed. The sound was diffused by using a method such as, disassembled into high frequencies, and wrapped in to mute the sound.

[0002] When a maze or a passage is lengthened, exhaust resistance increases, and as a result, exhaust pressure increases, which becomes resistance when exhaust pressure from the engine is low such as during low speed, and this becomes exhaust resistance. In addition, the exhaust resistance reduces the torque especially at low speed, which leads to an increase in the exhaust temperature and is one of the causes of engine overheating.

[Problems to be Solved by the Invention]

[0001] Most of the conventional silencers rely on the silencer for the final silence and change in sound quality, and there is a problem in durability system such as increase in volume due to secular change of the silencer.

[0002] As for sound deadening materials, various materials are being developed, but they still have various problems such as cost and environmental problems when they are discarded.

[0003] For muffling, it is necessary to make a passage or a maze long and complicated, but since exhaust resistance increases, the torque of the engine decreases.

[0004] Since the low-speed torque is low, the normal rotation is high,
Since the rotation during running becomes high, it causes an increase in running volume,
Fuel economy will also be poor.

[0005] In the conventional silencer, it is necessary to increase the silencer capacity for silencing, and the weight becomes heavy.

[0006] To improve fuel efficiency, braking ability, exercise ability, and the like,
We want to reduce the weight of the vehicle as much as possible, but the conventional silencer is difficult to quantify due to cost and structural problems.

[Means for Solving the Problems]

[0001] If the silencer has a simple structure and a silencer is not used, the size and weight can be reduced, and the original engine (characteristics) performance can be improved by reducing exhaust resistance.

【The invention's effect】

[0001] Improvement of engine characteristics With a small change in cross-sectional area and an improvement in exhaust efficiency, exhaust resistance is reduced even at low speeds, sufficient torque can be obtained from low speeds, and a smooth connection from low speeds to high speeds is realized. it can.

[0002] Improvement of fuel consumption Due to improvement of low-speed torque, the engine runs at a low rotation speed, so that the throttle opening can be reduced, resulting in improvement of fuel consumption.

[0003] Since the muffler structure improves the sound deadening (exhaust) efficiency, it does not require a special device such as a microphone, an amplifier, a speaker, and a computer to be attached later, and it is economical.

Correspondence to environmental problems Since no silencing material or the like is used in the internal structure, it is excellent in recycling when discarded. Although glass wool and ceramics are industrial waste, they leave dust and environmental problems, but since they are not used at all, there is no problem.

[0005] Weight and size of silencer Since the structure is simple, it is possible to make a silencer that is compact and lightweight. By being lightweight, it improves maneuverability and ecology (improves fuel efficiency, etc.) and leads to improved safety (braking efficiency, etc.).

[0006] Since the structure does not reduce the sound volume by controlling the exhaust pressure, it is suitable regardless of the displacement of the engine.

[0007] It does not depend on the number of cylinders or total displacement.

[0008] It is effective for all four-cycle engines in general, such as two-wheeled vehicles, four-wheeled vehicles, small ships, and aircraft.

[0009] Since the structure is small and lightweight, the degree of freedom in design is large.

[0010] By combining the length and thickness of the pipe of the muffler and the volume of the expansion chamber, the volume and sound quality can be freely changed and the sound can be silenced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure example of a muffler of the present invention.

FIG. 2 is a cross-sectional view, a structural example of the muffler of the present invention.

[Explanation of symbols]

 Fig. 11, muffler bulkhead 12, muffler bulkhead 23, muffler bulkhead 34, muffler tuning pipe 5, tuning pipe 6, exhaust outlet pipe 7, expansion chamber, muffler volume chamber 18, expansion chamber, muffler Volume chamber 29, expansion chamber, muffler volume chamber 3 10, FIG. 1 Muffler body FIG. 2 11, muffler partition wall 112, muffler partition wall 2 13, muffler partition wall 3 14, muffling tuning pipe 15, tuning pipe 16, Tuning pipe example 17, Fig. 2 Muffler body

[Procedure amendment]

[Submission date] September 19, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

[Title of Invention] Ecology muffler

Claims (1)

[Claims] 1. The muffler is silenced by controlling the frequency of the sound by the structure inside the muffler, and is muffled without using electrical de-ice or the like, and exhaust pressure and sound pressure are not reduced as much as possible to reduce exhaust resistance as much as possible. It was achieved through things.