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exhaust muffler

A technology of silencer and silencer, which is applied in the direction of exhaust device, silencer, exhaust treatment, etc. It can solve the problems of no roll pipe and blockage of exhaust pipe, so as to reduce pressure loss, prevent blockage and improve noise reduction performance Effect

Active Publication Date: 2020-12-29
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the position of the small hole is low, the condensed water accumulated in the muffler tends to flow into the pipe through the small hole, and clogging of the exhaust pipe tends to occur.
In addition, in Patent Document 1, there is no suggestion to use a rolled tube obtained by rolling a flat plate into a tubular shape as a tube. Research

Method used

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Experimental program
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Embodiment Construction

[0036] Hereinafter, the exhaust muffler device will be described with reference to the drawings. figure 1 It is a diagram showing an exhaust structure with an exhaust muffler. This exhaust structure has an exhaust pipe 16 that is connected to an engine (not shown) and leads exhaust gas to the outside. In the middle of the path of the exhaust pipe 16, a catalytic converter 14, a catalytic converter 14, and a The first exhaust muffler device 10 and the second exhaust muffler device 12 .

[0037] The catalytic converter 14 is used to purify the exhaust gas, for example, to remove harmful components in the exhaust gas through oxidation and reduction reactions. The second exhaust muffler 12 has a main muffler 18, and suppresses noise by reducing the pressure and temperature of the exhaust gas by expanding the exhaust gas flowing into the main muffler 18 or repeatedly disturbing the pressure wave. For the configuration of the catalytic converter 14 and the second exhaust muffler d...

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Abstract

The invention provides an exhaust silencer. The exhaust muffler installed in the middle of the exhaust path of the vehicle and reducing the exhaust noise includes: a sub-muffler (20), which is arranged in the middle of the exhaust path, and has an expansion chamber formed inside; an intake pipe (30), Airtightly inserted through the inlet opening (24) of the auxiliary muffler (20); and an air outlet pipe (40), airtightly inserted through the outlet opening (26) of the auxiliary muffler (20), regarding The air inlet pipe (30) and the air outlet pipe (40) are formed with openings (small holes (32, 42), non-joint parts) only in the area of ​​the upper half, while the lower half does not have the openings. The opening is closed.

Description

technical field [0001] This specification discloses an exhaust muffler installed in the middle of an exhaust path of a vehicle to reduce exhaust noise. Background technique [0002] Usually, an exhaust muffler device having a muffler is arranged in the middle of the exhaust path of the vehicle, and the exhaust gas gradually flows from the upstream end of the muffler toward the downstream end. Moisture contained in exhaust gas discharged from the engine may condense (generate condensed water) and stagnate at the bottom of the above-mentioned muffler. With the condensed water stagnant, when the muffler is tilted when the vehicle is parked on a slope or the like, the condensed water may flow out into the exhaust pipe. In this case, the inside of the small-diameter exhaust pipe may be filled with condensed water, thereby clogging the exhaust pipe. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2000-257418 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/00
CPCF01N1/083F01N2470/02F01N2490/08F01N2570/22F01N1/003F01N13/02F01N13/1805F01N13/1872F01N2470/04F01N2470/26F01N2490/15
Inventor 寺本大辉石畑隆人三浦岳广山本章
Owner TOYOTA JIDOSHA KK