JPH01104957A - Mixed gas feeding device for internal combustion engine - Google Patents

Abstract

PURPOSE:To improve the volume efficiency and combustion efficiency of an internal combustion engine by installing a device for feeding the finely atomized water into an intake passage on the upstream side of a throttle valve and varying the mist generation quantity according to the opening/closing operation of the throttle valve. CONSTITUTION:On the downstream side of an air cleaner 8 and on the upstream side of an intake manifold 1, an injection hole unit 9 which consists of an annular hollow body and has a plurality of injection holes 9b formed on the inner peripheral wall is installed. One edge of a mist introducing pipe 10 is connected to one position on the outer peripheral wall of the injection hole unit 9, and the other edge of the mist introducing pipe 10 is connected with a water level adjusting container 11 having a rectangular parallelo piped form. Water is supplied from a water pump 14 into the container 11, and the water level is always kept at a prescribed level by the action of a float 12. A vibrator 17 with which a supersonic wave oscillation circuit 16 is connected is installed on the bottom part of the container 11, and the mist generation quantity is varied by controlling the oscillation intensity of the vibrator 17 on the basis of the output of a variable resistor 12 for detecting the operation of a throttle valve 2.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a mixture supply device for an internal combustion engine.

Conventional technology Conventionally, this type of air-fuel mixture supply system for internal combustion engines uses high-speed airflow from intake air, similar to gasoline atomization, in order to improve the volumetric efficiency and combustion efficiency of the internal combustion engine, and to further improve cooling. It is known that the mixture is made into a mist and mixed into an air-fuel mixture. FIG. 2 shows a mixture supply device previously proposed for supplying such water.

This is configured such that water from a water tank 30 is sent to an intake manifold 32 by a water pump 31 to inject water into the air stream.

Problems to be Solved by the Invention However, in such conventional air-fuel mixture supply devices, although atomized water is mixed into the air-fuel mixture, the water particles are very large and close to water droplets. There was an inconvenience that could occur. As a result, an unfavorable state may occur in which water flows as a wall flow on the inner wall of the intake manifold 3.

Means for Solving the Problems Therefore, in the present invention, in order to solve the above problems, the intake passage upstream of the throttle valve is provided with a water supply device that supplies water finely atomized by a mist generating means. The configuration is such that the amount of fog generated by the fog generating means is changed in accordance with the opening and closing operations of the throttle valve.

The working water is turned into fine mist-like particles by the mist generating means, and is mixed into the air-fuel mixture in the intake passage.

When the throttle valve is opened and closed, that is, as the amount of intake air increases or decreases, the amount of mist generated by the fog generating means increases or decreases, thereby supplying an appropriate amount of mist water into the intake passage. Therefore,
It increases the volumetric efficiency and combustion efficiency of internal combustion engines, and also improves the cooling function.

Embodiment Hereinafter, details of the air-fuel mixture supply device for an internal combustion engine according to the present invention will be explained based on an embodiment shown in the drawings.

In the figure, I denotes an intake manifold as an intake passage, which can communicate with a combustion chamber (not shown) on the downstream side. A throttle valve 2 is disposed at a predetermined position of the intake manifold 1, and the intake air flow fit within the intake manifold 1 can be controlled. Upstream of the throttle valve 2, a main nozzle 4 of a carburetor 3, which is a fuel supply means, is arranged in a venturi 5 formed in an intake manifold l. As is well known, the carburetor 3 is generally composed of a float chamber 6 and a nozzle pipe 7, and is capable of supplying tjk of fuel to the combustion chamber in accordance with the amount of intake air.

An air cleaner 8 is provided upstream of the intake manifold I to introduce clean air into the intake manifold I. Note that a jet hole unit 9 is installed at a location downstream of the air cleaner 8 and upstream of the intake manifold 1.

This jet hole unit 9 is an annular hollow body, and has a flange 9a extending from the lower edge of the outer periphery, so that the rim flange 9a is fitted tightly into the upper end of the intake manifold 1. ing. Further, a plurality of jet holes 9b are bored in the inner circumferential wall of the jet hole unit 9.

Furthermore, one end of the mist introduction pipe IO is attached to one location on the outer circumferential wall of the jet hole unit 9 so as to communicate with the hollow portion 9c of the unit 9. The other end of the pipe IO is fixed to the upper end surface of the rectangular parallelepiped water level adjustment container I+,
It communicates with said container II. Further, one end of a water introduction pipe 13 is fixed to the center of the upper end surface of the water level adjustment container 11 so as to hang therethrough. A water pump 14 is connected in the middle of the water introduction pipe 13, and the other end is connected to a water tank 15.

A float I2 is housed in the water level J1%I adjustment vessel Il, and a guide rod 12a is vertically provided at the center of the upper end surface of the float 12.

This guide rod 12a is loosely fitted into a water introduction pipe 13 hanging down inside the water level adjustment container 11, so that the float I2 is floating 1-
Then, the upper end of the float 12 closes the lower end opening of the water introduction pipe 13 to prevent water from flowing in, and when the float I2 lowers, water is allowed to flow in, thereby ensuring a constant amount of water in the container 11 at all times. It looks like this.

A vibrator I7 to which an ultrasonic oscillation circuit 16 is connected is provided at the bottom of the water level adjustment vessel 11. This ultrasonic oscillation circuit 16 is connected to an oscillation intensity control circuit 18, and receives a control current from the circuit 18 to change the oscillation intensity of the vibrator I7. In the figure, reference numeral 19 denotes a power supply, which is used to change the constant voltage of the battery 20 to a desired voltage in accordance with the oscillation intensity of the ultrasonic oscillation circuit I6.

Further, a variable resistor 21 whose resistance changes in synchronization with the surface throttle valve 2 is connected to the oscillation intensity control circuit 18 . For more details, see Variable Resistor 2! The knob 21a rotates in conjunction with the valve shaft 2a of the throttle valve 2, and when the valve 2 is in a position that increases intake i, i, the knob 21a rotates in the opposite direction so that the resistance of the variable resistor 21 becomes smaller. The resistance is set so that when the intake air itt decreases, the resistance increases. That is, when the amount of intake air is large, the oscillation intensity of the oscillator 17 is increased to increase the amount of fog generated, thereby maintaining a balance between the air-fuel mixture Jjt and the amount of fog. In the opposite case, the fog generation 'd is reduced to maintain a balance between the air-fuel mixture amount and the fog (11).

Here, ultrasonic oscillation circuit +6. By using the ultrasonic oscillation means as the fog generation means, such as the vibrator 17, it becomes possible to instantaneously respond to the operation of the throttle valve 2 and obtain a predetermined amount of mist '3k to be mixed.

Although the embodiments have been described above, the present invention can be modified in various other ways. That is, although the ultrasonic oscillation means was used in this embodiment, the fog generation means is limited to this.
For example, various embodiments such as an automatic sprayer are possible. In addition, the fuel is also atomized using a fog generating means. Of course, it is also possible to adopt a configuration in which the fuel is introduced into the intake passage to further improve fuel efficiency.

Effects of the Invention As is clear from the above explanation, in the air-fuel mixture supply device for an internal combustion engine according to the present invention, water is added to the air-fuel mixture in the form of a fine mist using the fog generating means. Therefore, water can be prevented from flowing as a wall flow on the inner wall of the intake passage, and therefore, the desired i, 1 water can be accurately mixed into the air-fuel mixture, increasing the volumetric efficiency and combustion efficiency of the internal combustion engine. , 1- It also has the effect of enhancing the cooling function.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing one embodiment of the present invention, and FIG. 2 is an explanatory side view showing a conventional example. ■...Intake manifold, 2...Throttle valve, 11...Water level adjustment container, 14...Water pump, 15...Water tank, 16...Ultrasonic oscillation circuit, I
7... Vibrator.

Claims (1)

[Claims] The intake passage upstream of the throttle valve is equipped with a water supply device that supplies finely atomized water by a fog generating means,
A mixture supply device for an internal combustion engine, characterized in that the amount of mist generated by the fog generating means is changed in accordance with opening and closing operations of a throttle valve.