JPH03179132A - Exhaust device of internal combustion engine - Google Patents

Abstract

PURPOSE:To improve the efficiency of an internal combustion engine by providing an exhaust fan on the way of exhaust system in the engine, thereby sucking the exhaust gas with the exhaust fan, and exhausting it forcedly, resulting in decreasing the flowing resistance of the exhaust gas. CONSTITUTION:An expansion part 2 is formed on the mid-way of a pipe 1 in which an air-motor 4 is provided under covering with a partition wall 3. An air-motor 4 is connected a compressed air supply tubes 5 to supply compressed air from outside of the pipe 1 so as to rotatively drive the air-motor 4, while the compressed air rotatively driven the air-motor 4 is exhausted into the pipe 1 through an air exhaust tube 6. Moreover, the rotary shaft 7 of the air-motor 4 is tightly fitted an exhaust fan 8 so as to exhaust the exhaust gas, that is, by means of rotating the exhaust fan 8 by supplying compressed air to the air-motor 4, thereby rotating the exhaust fan 8, the exhaust gas exhausted from the internal combustion engine is exhausted outside through catalyst 9.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to gasoline engines used in automobiles, etc.
This invention relates to an exhaust system for internal combustion engines such as diesel engines.

[Prior art] Conventional exhaust systems for internal combustion engines reduce CO and NO in exhaust gas.
A catalyst was used to reduce harmful substances such as .

[Problems to be Solved by the Invention] Conventional exhaust systems for internal combustion engines have the disadvantage that not only the catalyst and muffler but also the vibrator connecting these act as exhaust gas flow resistance, reducing the efficiency of the internal combustion engine. there were.

This invention aims to improve the efficiency of an internal combustion engine by reducing the flow resistance of exhaust gas.

[Means for Solving the Problems] The exhaust system for an internal combustion engine of the present invention is characterized in that an exhaust fan is provided in the middle of the exhaust system of the internal combustion engine.

[Function] The exhaust fan sucks in the exhaust gas from the internal combustion engine and forcibly discharges it, reducing the flow resistance of the exhaust gas.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a cross-sectional view of an embodiment of the present invention, in which an enlarged portion 2 is formed in the middle of a vibrator 1 whose left end is connected to an exhaust port of an internal combustion engine, and a muffler is connected to the right end of a pipe 1. It is connected to the.

Inside the ampulla 2 is an air motor 4 covered with a partition wall 3.
A compressed air supply pipe 5 for supplying compressed air from outside the pipe l is connected to the air motor 4 to rotate the air motor 4. The compressed air is discharged into the pipe l through an air discharge pipe 6 toward the muffler. An exhaust fan 8 is fixed to the rotating shaft 7 of the air motor 4, and when the rotating shaft 7 rotates the exhaust fan 8, it sucks the exhaust gas from the left side of the pipe lΦ and moves it to the right as shown by the arrow. It is forced to flow.

A catalyst 9 is filled between the enlarged portion 2 of the pipe 1 and the partition wall 3 to reduce harmful substances such as CO5NOX in the exhaust gas.

When the internal combustion engine is operated while supplying compressed air to the air motor 4 and rotating the exhaust fan 8, the exhaust gas discharged from the exhaust hole of the internal combustion engine is sucked by the exhaust fan 8 and flows inside the pipe l from the left. It is forced to the right, passes through the exhaust fan 8, comes into contact with the rear catalyst 9, and is further pushed by the wake from the exhaust fan 8, passes through the muffler from the right end of pipe l, and is discharged to the outside. .

The embodiment shown in FIG. 1 described above includes an internal combustion engine, an exhaust fan 8,
The exhaust system of an internal combustion engine is composed of the catalyst 9 and the muffler in that order.
The exhaust system of the internal combustion engine 10 may be configured in the order of the catalyst 9, the exhaust fan 8, the muffler 11, or as shown in FIG. exhaust fan 8
It is also possible to configure the exhaust system of the internal combustion engine lO in this order.

The embodiment shown in FIG. 4 is for a diesel engine, and without using a catalyst 9, an exhaust fan 8 having one or more blades connected in series is connected next to an internal combustion engine 10, and a filter is placed next to the exhaust fan 8. 12, a muffler 11 is connected to constitute an exhaust system for the internal combustion engine 10.

[Effects of the Invention] This invention uses an exhaust fan to suck in the exhaust gas of an internal combustion engine and forcefully discharge it, so the flow resistance of the exhaust gas is reduced and the exhaust gas purification function and exhaust noise reduction effect are not impaired. It is possible to improve the efficiency of the internal combustion engine and increase its output.

Furthermore, if the output of the internal combustion engine is kept constant, the amount of exhaust gas can be reduced, so the amount of harmful exhaust gas can be reduced and fuel efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the invention, and FIGS. 2 to 4 are block diagrams of other embodiments of the invention. 1... Pipe, 2... Ampulla, 3... Bulkhead, 4...
...Air motor 5...Compressed air supply pipe, 6...
Air exhaust pipe, 7... Rotating shaft, 8... Exhaust fan, 9
...Catalyst, IO...Internal combustion engine, 11...Muffler 12...Filter

Claims (1)

[Claims] An exhaust system for an internal combustion engine, characterized in that an exhaust fan is provided in the middle of an exhaust system of the internal combustion engine.