JPS6215457Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dual exhaust purification device using a monolith catalyst, and particularly to an underfloor type exhaust purification device interposed in the middle of a dual exhaust pipe.

Most conventional exhaust purification systems using catalysts are single, and in rare cases, even the front pipe is dual, but since it is not a complete dual exhaust system, it causes exhaust interference and an increase in exhaust resistance. The engine power was reduced and an increase in fuel consumption was inevitable.

This invention is a complete dual system in which exhaust gas flows both before and after exhaust gas flows into the monolithic catalyst, thereby eliminating exhaust interference and reducing exhaust resistance, thereby increasing output and fuel efficiency. It is an object of the present invention to provide a dual exhaust system that can achieve the following.

For this reason, the configuration of the present invention is such that an inlet partition wall is provided along the inlet of the monolithic catalyst to guide dually flowing exhaust gases to the monolithic catalyst without mixing them, and an inlet partition wall is provided along the outlet of the monolithic catalyst. The exhaust gas is characterized by being equipped with an outlet partition that allows the exhaust gas purified by the monolithic catalyst to flow out dually without being mixed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a first embodiment of the present invention, and FIGS. 5 to 10 show a second embodiment of the present invention.

In FIGS. 1 to 4, reference numeral 1 denotes a dual exhaust pipe, which is connected to an exhaust manifold of an engine (not shown). 2 is a monolith catalyst case that houses and holds a monolith catalyst, which will be described later. Reference numeral 3 denotes an inlet partition wall that guides the exhaust gas flowing from the dual exhaust pipe 1 to a monolithic catalyst, which will be described later, without mixing the exhaust gas. Reference numeral 4 denotes a monolith catalyst, in which the incoming exhaust gas is guided straight through the cell to the outlet, during which time the exhaust gas is purified. Reference numeral 5 denotes an inlet flange that connects the dual exhaust pipe 1 and the monolithic catalyst case 2. 6 is an outlet partition, which is similar to the inlet partition 3;
Corresponding to this, the exhaust gas carried by the dual exhaust pipe 1 goes straight through the monolith catalyst 4 and is again prevented from being mixed by the partition wall 6.
It is designed to lead to a dual exhaust pipe 8, which will be described later. Reference numeral 7 denotes an outlet flange that connects the monolithic catalyst case 2 and the dual exhaust pipe 8.

In a dual exhaust purification device using a monolithic catalyst configured as shown in FIGS. 1 to 4, an inlet partition wall 3 provided at the inlet of the monolithic catalyst 4 and an inlet partition wall 3 provided at the outlet of the monolithic catalyst 4 are provided. First, due to the existence of the inlet partition wall 3, the exhaust gases flowing from the dual exhaust pipe 1 do not mix, and maintain the dual state as it is, and the exhaust gas flows through the monolith catalyst 4.
The exhaust gas is guided straight through the catalyst 4, purified during this time, and then, due to the presence of the outlet partition wall 6, the purified exhaust gas does not mix and maintains the dual state again to form the dual exhaust. This leads to pipe 8. Therefore, a complete dual exhaust system is configured including the monolith catalyst 4, and it is possible to improve output and fuel efficiency.

As described above, the present invention has an inlet partition provided along the inlet of the monolithic catalyst to guide the dually flowing exhaust gases to the monolithic catalyst without mixing them, and an inlet partition provided along the exit of the monolithic catalyst to guide the dually flowing exhaust gases to the monolithic catalyst without mixing them. It is equipped with an outlet partition that allows the exhaust gas purified by the monolithic catalyst to flow out dually without mixing, forming a complete dual exhaust system, which eliminates exhaust interference and reduces exhaust resistance. It guarantees an improvement in engine output and fuel efficiency, and has a simple structure.
Furthermore, the case containing the catalyst is formed into an oval shape, and the long axis of the oval shape is divided into two, making it easier to connect dual exhaust pipes and smoothing the flow of exhaust gas through the catalyst. The effect it has is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a cross section of the upper half of the first embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a side view taken along the arrow line A-A in FIG. The figure is a side view taken along the arrow line B-B in FIG. 1. 1...Dual exhaust pipe, 1'...
Dual exhaust manifold, 2... Monolith catalyst case, 3... Inlet partition, 4... Monolith catalyst, 5... Inlet flange, 6... Outlet partition, 7
...Outlet flange, 8...Dual exhaust pipe, 8'...Dual exhaust manifold.

Claims (1)

[Scope of utility model registration request] A dual exhaust system that purifies exhaust gas by installing a monolithic catalyst housed in a case in the middle of a dual exhaust pipe, the case having an oval cross section, and an inlet of the monolithic catalyst in the case. A partition wall that divides the case into two in the long axis direction of an oval shape is provided on each of the side and the exit side, and an inlet end and an exit end of the case are provided with a partition wall that divides the case inside the case partitioned by the partition wall. A dual exhaust purification device using a monolith catalyst, characterized in that dual exhaust pipes are connected so as to communicate with each of the chambers.