JPH0219540Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a muffler with a spark arrester for an internal combustion engine.

In an internal combustion engine, exhaust gas is muffled and released by a muffler. Also, the carbon residue contained in the exhaust gas may turn into sparks and be released from the rear end of the muffler, so if you are concerned about sparks coming out, connect a spark arrester to the rear end of the muffler. A carbon barrier is created in the exhaust gas to prevent sparks from forming outside. However, when a spark arrestor is connected to a muffler, it protrudes for a long time, which is inconvenient. Therefore, there are some mufflers that have a spark arrester chamber directly at the rear end, but this requires space for the carbon retaining part and the spark arrester holding part, which reduces the muffler's silencing volume, and the structure is complicated and manufacturing costs are high. It's expensive.

In view of these points, this invention reduces the volume for the spark arrester chamber, secures the volume of the silencing chamber, houses the spark arrester chamber at the rear of the muffler, and improves the structure to be simple and inexpensive. Embodiments of the present invention shown in the drawings will be described below.

A spark arrester chamber 2 is housed in the center of the rear part of the muffler tube 1. Spark arrester chamber 2 is
A discharge pipe 3 inserted into the center of the rear part is connected to the rear end of the muffler cylinder 1 so as to be open. The spark arrester chamber 2 is configured to create a vortex flow inside the exhaust gas, and is configured to separate carbon particles and keep them in the lower part. The spark arrester chamber 2 is fixed to the muffler tube 1 by welding the front part with an annular partition plate 4. Further, a cup piece 5 is welded to the rear lower part and fixed to the muffler tube 1. The cup piece 5 communicates with the spark arrester chamber 2, is secured with carbon, and has a drain 6 at its lower end. Partition plate 4
By providing the through holes 7, the space around the spark arrester chamber 2 of the muffler tube 1 is made into an exhaust buffer chamber 8.

Thus, a spark arrester chamber 2 having a volume necessary to catch sparks is housed at the rear of the muffler tube 1. The spark arrester chamber 2 is held by welding to the muffler tube 1 by a partition plate 4 and a cup piece 5, and the inside of the cup piece 5 serves as a retainer for carbon particles.
The drain 6 allows carbon particles to be removed and cleaned as appropriate. The area around the spark arrester chamber 2 at the rear of the muffler tube 1 becomes an exhaust gas exhaust buffer chamber 8 by providing a through hole 7 in the partition plate 4.
It helps with sound deadening and there is no dead space. In this way, the overall length of the muffler tube 1 can be made short and compact.

As explained above, this idea involves inserting a spark arrester chamber into the rear part of the muffler tube, opening it rearward with a discharge pipe, holding the front end of the spark arrester chamber in the muffler tube with an annular partition plate, and The lower part was held in the muffler tube with a cup piece, the inside of the cup piece was secured with carbon, a drain was provided at the lower end, and a through hole was made in the partition plate to form the inside of the muffler tube outside the spark arrester chamber as an exhaust buffer chamber. The spark arrester chamber can be held in the rear part of the muffler cylinder by a partition plate and a cup piece, and the structure is simple.The inside of the cup piece is secured with carbon and can be cleaned with a drain. Furthermore, the area around the spark arrester chamber can also be used as an exhaust buffer chamber to muffle noise, eliminating any dead space, making effective use of the muffler cylinder volume, and making the muffler more compact.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is an enlarged vertical sectional side view of the part indicated by arrow A in Fig. 1, and Fig. 3 is a cross section taken along arrow B-B in Fig. 2. It is a diagram. 1...Muffler tube, 2...Spark arrester chamber, 3...Discharge pipe, 4...Partition plate, 5...Cup piece, 6...Drain, 7...Through hole, 8...Exhaust buffer chamber.

Claims (1)

[Scope of utility model registration request] A spark arrester chamber is inserted into the rear part of the muffler cylinder and opened to the rear with a discharge pipe, the front end of the spark arrester chamber is held to the muffler cylinder by an annular partition plate, and the rear lower part of the spark arrester chamber is held to the muffler cylinder by a cup piece. , with a spark arrester for an internal combustion engine, characterized in that the inside of the cup piece is secured with carbon and a drain is provided at the lower end, and a through hole is provided in the partition plate to form an exhaust buffer chamber inside the muffler cylinder outside the spark arrester chamber. scarf.