JPS6246849Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vaporizer in which a liquid-impregnated plate made of a porous material is provided facing an inlet.

In general, small portable engines such as chain saws and brush cutters rotate at high speeds, so the intake port of the engine is opened early, which may cause blowback due to residual pressure. This blowback wind flows backwards inside the carburetor, causing air mixed with fuel to blow out from the intake port of the carburetor, resulting in fuel loss. For this reason, conventionally, a blowback prevention plate is provided facing the intake port of a carburetor to buffer the blowback wind, but the fuel contained in the blowback air adheres to this blowback prevention plate and is released to the outside. Dripping and fuel loss could not be prevented.

This invention buffers the blowback air by providing a liquid-impregnated plate made of a porous material facing the inlet of the vaporizer so that it can be freely ventilated and covering the inlet through an appropriate gap passage. At the same time, it absorbs and retains the fuel contained in the blowback wind, and conversely, it is sucked into the air that has returned to its normal flow and is absorbed by the air that passes through this liquid-containing fluid, allowing it to be collected. This is what we are trying to do.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is an intake port provided in a cylinder 3 of the engine, 5 is a carburetor, and a mounting chamber 11 around the intake port 1 is attached by bolts 9, 9 via an intermediate body 7.
is fixed to. The intermediate body 7 and the bolt 9 are made of a heat insulating material such as a synthetic resin or a synthetic resin with a glass fiber core, and the heat from the cylinder 3 is transferred to the vaporizer 5.
This prevents transmission from occurring. 13 is intake port 1
A main nozzle port 17 opens in a constriction part 15 formed in a part of the air passage communicating with the main nozzle, and fuel is ejected. 19 is a throttle valve that opens and closes the air passage 13. Reference numeral 21 denotes a liquid-impregnated plate made of a porous material such as a porous synthetic resin or a sintered alloy through which air can freely pass. It is installed to cover the 27 rivets the liquid-containing plate 21 29, 29
The bracket is fixed to the carburetor 5 by bolts 9, 9.

In the above embodiment, the atmosphere is drawn into the suction port 23 from the gap passage 25, passes through the air passage 13,
While being sucked into the cylinder 3 from the intake port 1, a portion of the intake air passes through the liquid-containing plate 21 and is sucked. When this air passes through the throttle section 15, the pressure is further reduced, and fuel is ejected from the main nozzle port 17 and mixed into the air. When the engine blows back, the air containing the fuel flows back and collides with the liquid-containing plate 21 to be buffered, and the fuel adheres to and is absorbed by the liquid-containing plate 21. When the engine returns to normal, the air flowing in the forward direction
The fuel absorbed and held by the liquid-containing plate 21 is sucked out by the air passing through the liquid-containing plate 21 and mixed into this air, and enters the cylinder 3 where it is combusted. do.

Since the present invention has the configuration as described in the claims, it buffers the blowback wind from the engine and prevents it from blowing out from the intake port of the carburetor, and
It can temporarily absorb and retain the fuel contained in the blowback wind, and mix it into the air again, thereby eliminating wasteful consumption of fuel. In addition,
The liquid-impregnated plate is made of a porous material that allows for free ventilation, so the fuel absorbed and retained in the liquid-impregnated plate can be easily sucked out and mixed into the intake air, and it also allows air to pass through. Therefore, the gap passage 25 can be made narrower during normal engine operation. When the gap passage 25 becomes narrower, the buffering effect becomes more effective at the time of blowback.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols shown in the claims do not limit the technical scope of the present invention.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are each a part of the present invention.
They are a front sectional view, a side sectional view, and a plan sectional view of the embodiment. 21...Liquid-containing plate, 23...Suction port, 25...Gap passage.

Claims (1)

[Scope of utility model registration request] A liquid-impregnated plate 21 made of a porous material and provided so as to be freely ventilated facing the suction port 23 is inserted into an appropriate gap passage 25.
A vaporizer characterized in that the vaporizer is disposed so as to cover the suction port 23 via the inlet.