JPS6220668A - Evaporating and mixing apparatus for fuel for engine - Google Patents

Abstract

PURPOSE:To stably evaporate fuel without being influenced by the outside air condition and obtain a small-sized and compact heating apparatus by installing the heating apparatus onto an evaporating and mixing apparatus for evaporating and mixing liquid fuel. CONSTITUTION:The liquid fuel in a fuel container 31 is jetted out into an evaporating chamber 35 constituting an evaporating and mixing apparatus 14, and after the pressure is adjusted by a pressure adjustor 41, the fuel is inhaled into a cylinder 5, passing through a mixing device 11 by the pressure variation due to the movement of a piston 25 in an engine 1, and is combusted. Further, simultaneously with the start of operation, exhaust wind is introduced into a heating chamber 45, and the evaporation chamber 35 is heated, and the fuel necessary for the engine 1 is evaporated and supplied. Further, by opening and closing a pressure adjusting valve 53 for adjusting the exhaust wind to a proper pressure, the always stable supply of fuel is maintained. While, when the outside air temperature is low on start, the part exposed outside a heating body 57 is heated by a lighter, etc., and the evaporation inside the heating chamber 45 is accelerated.

Description

DETAILED DESCRIPTION OF THE INVENTION 0) Industrial Application Field The present invention relates to an engine fuel vaporization and mixing device that vaporizes liquefied gas fuel, mixes it with air, and supplies the mixture to the engine.

(b) Prior art and problems to be solved Conventionally, in this type of fuel vaporization mixing device for an engine, liquid is extracted from a fuel container according to the outside air environment.

Spouts gas or liquefied fuel containing a mixture of liquid and gas,
The liquefied fuel that spewed out was mixed with air and supplied to the engine. This conventional fuel vaporization and mixing device has the following drawbacks. In other words, when using butane-based liquefied gas fuel as the main component, the temperature at which the liquefied butane-based fuel can be vaporized is 0.
It is almost impossible to vaporize fuel at temperatures above O'C, and the amount of vaporization actually decreases at temperatures above O'C, resulting in a shortage in the amount of fuel necessary for the engine to achieve its full performance. Regarding starting, even if starting is possible with fuel that is insufficiently vaporized, there is a drawback that the fuel supply is insufficient in practical operation as described above. Also, compared to gasoline, the latent heat of vaporization is large, and when it is ejected from the nozzle, the temperature of the nozzle part drops, causing icing, which can make operation impossible. Therefore, it is recommended to heat the fuel container to promote vaporization. However, the disadvantage was that the device was large because it heated all of the stored fuel.

(C) Means and operation for solving the problem The present invention is a vaporization mixing device for vaporizing and mixing fuel, which is provided with a heating device. The aim is to always provide a stable supply of fuel sufficient to meet the demands of the industry, regardless of outside air conditions.

(d) Example Hereinafter, one example of the present invention will be described in detail with reference to the drawings.

In the figure, a cylinder 5 is fixed above a crankcase 3 of an engine 1, an exhaust port 9 communicating with a muffler 7 is provided on the side wall of the cylinder 5, and a mixer 1 is provided on the other side wall.
A suction port 15 that communicates with the air cleaner 13 via the air cleaner 1 is open. The muffler 7 is provided with an exhaust hole 17. Crankshaft 1 supported by crankcase 3
9, a connecting rod 21 is connected at one end via a crank pin 23, and the other end is connected to a piston 2 that can freely slide into the cylinder 5.
5 via a piston pin 27. Two spark plugs are provided at the top of the cylinder 5. A fixing device 33 for removably attaching a fuel container 31 for storing liquefied gas fuel in liquid form is firmly attached to the lower part of the crankcase 3, and a vaporization chamber 3 is provided integrally with the fixing device 33.
The injection port 37 of the fuel container 31 and the discharge port 39 of the fuel container 31 are formed to communicate with each other to seal and engage with each other.

A pressure regulator 41 is provided in communication with the vaporization chamber 35 and communicates with the mixer 11 via a communication pipe 43.

The vaporization chamber 35, the pressure regulator 41, and the mixer 11 constitute a vaporization mixing device 44. The vaporization mixer 44 is provided with a heating device 45 .

That is, a heating chamber 49 having an exhaust port 48 is formed by covering a part of the outer periphery of the outer wall 47 of the vaporization chamber 35.
9 communicates with the ejection port 17 of the muffler 7 via a communication path 51. The communication passage 51 is provided with a control valve 53 that adjusts the area of the passage and opens an opening 52 that communicates with the atmosphere.

A sensing device 55 for sensing temperature is provided in the vaporization chamber 35, and a control valve 53 is provided to operate in conjunction with the operation of the sensing device @55. Further, a heating body 57 made of a thermally conductive metal rod such as copper is provided passing through the heating element 49.

In the above embodiment, the liquid fuel in the fuel container 31 is injected into the vaporization chamber 35, the pressure is regulated by the pressure regulator 41, and the pressure changes due to the movement of the piston 25 inside the engine 1 causes the liquid fuel to flow through the mixer 11 into the cylinder. 5 and burns. As soon as the operation starts, the exhaust air flows into the heating room 35.
The fuel enters the engine and heats the vaporization chamber 35, and the heating temperature increases as time passes, vaporizing and supplying the fuel necessary for the engine 1. Furthermore, by opening and closing the control valve 53, which adjusts the exhaust air as appropriate in response to outside temperature conditions and usage conditions, a stable supply of fuel can be maintained at all times. Additionally, if it is difficult to maintain stable operation due to low outside air temperature and unstable vaporization during startup, the externally exposed portion of the heating element 57 is forcibly heated with a lighter, etc., and the vaporization is carried out in the heating chamber 49. By promoting this, fuel can be stably supplied. Note that the fuel vaporization and mixing device 44 of the present invention
is the pressure regulator 41. Other parts such as the mixer 11 may be heated, and heat sources for heating may include cooling air from the engine 1, side heat from the exhaust system, cylinder 5, etc., conduction heat,
It is possible to use a ground heat source such as convection heat or a power source such as a power generator such as a magneto.

<8) Effects of the Invention Since the present invention has the configuration as described in the claims, by heating the fuel vaporization and mixing device, the necessary fuel can be vaporized and mixed with air without being affected by the outside air environment. It can be supplied to the engine and the heating device can be made small and compact.

It should be noted that the present invention is not limited to the embodiment described above, but can be implemented in other situations as well. Further, the reference numerals shown in the claims do not limit the technical scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of one embodiment of the present invention. 1... Engine 11... Mixer 35... Vaporization chamber 41... Pressure regulation to 44... Vaporization mixing device 45... Heating chamber patent applicant Komatsu Zenoah Co., Ltd. +, ', --・Representative Patent Attorney Yasuo Miyoshi
−；“′□″−”゛−゛: Agent Patent attorney Miyoshi
Hide Kazu -Kyou1::I:+1'2ni゛-・Goblade

Claims (1)

[Claims] A vaporization chamber 35 that vaporizes liquid fuel, a pressure regulator 41 that regulates the pressure of the fuel vaporized in the vaporization chamber 35, and a mixer 1 that mixes an appropriate amount of pressure-regulated fuel with air and supplies it to the engine 1.
1. A fuel vaporization and mixing device for an engine, characterized in that a fuel vaporization and mixing device 44 consisting of the following is provided with a heating device 45 for promoting vaporization.