JP2005320950A - Automobile muffler automatically draining corrosive stagnated water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure automatically discharging, to the outside, stagnated water causing a reduction in muffling effect by the stagnated water in a silencer and the corrosion of a muffler. <P>SOLUTION: A thin pipe 6 connecting an exhaust gas flow 4 to the stagnated water 5 is installed at the rear lower part of the silencer 2. The thin pipe 6 is installed so as to extend from near the rear bottom part of the silencer 2 to the diameter inner side of an exhaust port pipe 3 which is the outlet of a main passage for exhaust gas. The stagnated water 5 is sucked by the spraying effect and the gas pressure of exhaust gas flow, and automatically discharged to the outside together with the exhaust gas flow 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a silencing effect and a corrosion prevention technique for a muffler with a silencer that is mounted to silence noise caused by exhaust gas discharged from an internal combustion engine such as an automobile.

  As shown in FIG. 1, exhaust gas from an engine 0 that is an internal combustion engine passes through an exhaust pipe 1 and further passes through an exhaust pipe 3 through a silencer 2 that is mounted for the purpose of silencing noise caused by the exhaust gas. To be discharged. Of the exhaust pipe 1, silencer 2 and exhaust pipe 3 constituting the muffler, the silencer 2 is made larger than the front and rear exhaust pipes 1 and 3 in order to increase the silencing effect.

  As a result, corrosive water caused by water vapor or harmful gas in the exhaust gas accumulates in the lower part of the silencer 2, causing a reduction in the silencing effect thereof, and shortening the life of the muffler due to corrosion of stagnant water.

  An object of the present invention is to provide a structure that automatically discharges the staying water 5 in the silencer 2 that brings about a decrease in the silencing effect due to the staying water and corrosion of the muffler.

  The means of the present invention for solving this problem is to provide a narrow tube 6 connecting the exhaust gas flow 4 and the accumulated water 5 at the lower rear portion of the silencer 2 as shown in FIG.

  The narrow tube 6 of the present invention is installed from the vicinity of the rear bottom of the silencer 2 so as to reach the inside of the diameter of the exhaust pipe 3 corresponding to the outlet of the main passage of the exhaust gas, and the retained water 5 in the silencer 2 is passed through the narrow tube 6. The exhaust gas stream 4 is sucked up by the spraying effect of the exhaust gas stream 4 and the gas pressure applied to the staying water 5 and is automatically atomized together with the exhaust gas stream 4 to the outside. Accordingly, the bottom of the silencer 2 always has only moisture that evaporates by heat from the exhaust gas, and the noise reduction effect and muffler corrosion can be prevented.

  The lower end of the narrow tube 6 is set as close as possible to the bottom where the accumulated water 5 in the silencer 2 is easy to collect, and the upper end of the narrow tube 6 is an exhaust port having a flow rate of exhaust gas as large as possible within the range not to disturb the flow of exhaust gas. It is desirable to reach the vicinity of the center of the pipe 3. Further, this effect can be increased by providing a plurality of thin tubes 6.

  FIG. 2 is a cross-sectional view of the silencer 2 according to the embodiment of the present invention. A thin tube 6 is provided at the lower rear portion of the silencer 2, and stays by utilizing the spray effect of the waste gas flow 4 and the pressure of exhaust gas applied to the staying water 5. The water 5 is discharged along with the waste gas stream 4 via the narrow tube 6.

  FIG. 3 shows the simplest embodiment of the present invention, in which a drain hole 7 for automatically discharging stagnant water 5 with exhaust gas pressure is provided at the bottom of the rear part of the silencer 2.

  A thin tube 6 is provided instead of the drain hole 7 in FIG. 3, the upper end of the thin tube 6 is bent and extended, and the upper end of the thin tube 6 is connected to the outside of the exhaust port pipe 3 through the lower end of the exhaust port pipe 3. The accumulated water 5 can be discharged by the gas pressure applied to the accumulated water 5.

  As can be seen from the above embodiment, the present invention can always automatically discharge the staying water 5 in the silencer 2 with a very simple configuration, and simultaneously prevent the deterioration of the silencing effect due to the staying water 5 and the short life due to corrosion. Since it can be used, the use effect is great in the industry.

  The block diagram of the relationship between the basic configuration of the muffler and the exhaust gas emission engine.   Sectional drawing of the silencer 2 of the Example which provided the thin tube 6 of this invention.   Sectional drawing of the silencer 2 of the Example which provided the drainage hole 7 of this invention.

Explanation of symbols

0 Engine 1 Exhaust pipe 2 Silencer 3 Exhaust port pipe 4 Exhaust gas flow 5 Stagnant water 6 Narrow tube 7 Drain hole

Claims (3)

  A silencer provided with a thin tube for automatically discharging the accumulated water in the silencer with the exhaust gas in a device for silencing the noise caused by the exhaust gas.   A silencer provided with a drain hole that automatically drains the accumulated water in the silencer with the pressure of the exhaust gas in a device that silences noise caused by the exhaust gas.   A silencer provided with a thin tube for discharging the accumulated water in the silencer so as to reach the outside of the silencer in a device for silencing noise caused by exhaust gas.

Images