JPH02223670A - Driven system for spark ignition engine by ultrasonic atomizing device - Google Patents

Abstract

PURPOSE:To enable the use of liquid fuel consisting mainly of a component having cut higher than that of gasoline by a method wherein during the starting of an engine, for example, gasoline is fed to an ultrasonic atomizing device, and after the starting, liquid fuel consisting mainly of a component having cut higher than that of gasoline is fed thereto to increase a spray amount. CONSTITUTION:An ultrasonic atomizing device 2 sprays fuel, fed to the atomizing region of a vibrator 10 through a fuel feed pipe 12, and atomizes it in a suction pipe 7. An enlarging part 10a is mounted to the tip of the vibrator 10, fuel is injected at a given angle to the enlarging part 10a to increase a spray amount. A fuel feed pipe 12 feeds gasoline through a valve 13 and feeds light oil through a valve 14. during the starting of an engine, the valve 13 of the fuel feed pipe 12 is opened to feed a small amount of gasoline to the vibrator 10 of the ultrasonic atomizing device 2, and gasified gasoline is fed to an engine 1 through reed valves 5 and 6 to an engine 1. After the starting of an engine, the valve 14 of the fuel feed pipe 12 is opened to feed light oil to the vibrator 10, the light oil is atomized to spray it in the suction pipe 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides spark ignition engines for use in automobiles, outboard motors, portable power units, drive devices for consumer heat pump devices, etc. The present invention relates to a method for driving a spark ignition engine using an ultrasonic atomizer, which enables the engine to be driven by liquid fuel whose main component is liquid fuel.

[Conventional technology]

Conventionally, various applications of ultrasonic injection valves to spark ignition engines using gasoline as fuel have been proposed.

Spark ignition engines have the advantage of being lighter and less noisy than diesel engines, but because they use gasoline as fuel, they have the disadvantages of high fuel costs and inferior safety.

On the other hand, the use of fuels other than gasoline is limited to outboard motors and two-cycle spark ignition engines for agriculture. An ultrasonic atomizer using a plate is used to atomize fuel only during startup, and during steady operation, fuel is supplied by a vaporizer.

[Problem to be solved by the invention]

However, in the conventional method described above, since the ultrasonic atomization device uses a diaphragm, the spray flow rate is low and the ultrasonic atomization device can only be used at startup, and it also uses a heavier fuel than kerosene. I couldn't.

On the other hand, there are diesel engines that use light oil as fuel, but they are heavier than spark ignition engines, making them unsuitable for portable equipment, for example, and they are also noisy, so they are not used in civilian applications, for example. The scope of use is limited, such as being unsuitable for heat pump devices for heating and cooling purposes.

An object of the present invention is to solve the above-mentioned problem, and to increase the amount of atomization by an ultrasonic atomizer in a spark ignition engine, and to increase the amount of atomization using an ultrasonic atomizer, and in particular to increase the amount of atomized fuel that contains no more than gasoline fraction, especially heavy fuel that does not substantially contain gasoline fraction. The purpose of this invention is to make it possible to use a liquid fuel whose main component is a distillate component as a fuel.

[Means to solve the problem]

To this end, the drive method of the spark ignition engine using the ultrasonic atomizer of the present invention is such that the ultrasonic atomizer 2 is disposed in the intake pipe 7 of the spark ignition engine 1, and when starting the engine, for example, gasoline is atomized into the ultrasonic atomizer. After the engine is started, a liquid fuel whose main component is a gasoline fraction or higher is supplied to the ultrasonic atomization device 2, and the liquid fuel is atomized and sprayed into the intake pipe 7. It is characterized by

Note that the numbers added to the above configurations are for comparison with the drawings, and the configurations of the present invention are not limited thereby.

[Effect]

In the present invention, for example, as shown in FIG. 1, when starting the engine, the valve 13 of the fuel supply pipe 12 is opened to supply a small amount of gasoline to the vibrator 10 of the ultrasonic atomizer 2.
The vaporized gasoline is supplied to the engine 1 via the reed valve 5.6. After starting the engine, the valve 14 of the fuel supply pipe 12 is opened to supply light oil to the vibrator 10, and the light oil is atomized and sprayed into the intake pipe 7.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an actual example 711i in which the spark ignition engine drive system of the present invention is applied to a two-cycle spark ignition engine.

The two-stroke spark ignition engine 1 has an upper crankcase 3 and a lower crankcase 4, each of which is connected to an intake pipe 7 via a reed valve 5.6. A throttle valve 8 and an ultrasonic atomizer 2 are arranged in the intake pipe 7 .

The ultrasonic atomizer 2 has a vibrator 10 disposed within a sleeve 9, and the sleeve 9 is installed in an intake pipe 7 so as to be inclined toward the engine side (approximately 30 degrees with respect to the intake pipe 7).
The signal output from an ultrasonic oscillator (not shown) is
The acoustic converting element 11 converts the fuel into ultrasonic vibrations, atomizes the fuel supplied from the fuel supply pipe 12 to the atomization region of the vibrator 10, and sprays the atomized fuel into the intake pipe 7. Note that an enlarged diameter portion tOa is provided at the tip of the vibrator 10,
Fuel is injected into the enlarged diameter portion 10a at a predetermined angle to increase the amount of spray.

The fuel supply pipe 12 is configured to be supplied with gasoline through a valve 13 and with light oil through a valve 14. The light oil is heated to around 150"C in a heater 15 and the fuel is heated. It promotes evaporation.

To explain the operation of the present invention having the above configuration, first, when starting the engine, the valve 13 of the fuel supply pipe 12
Open it and pour a small amount of gasoline into the vibrator 1 of the ultrasonic atomizer 2.
0 and the vaporized gasoline is supplied to the engine 1 via the reed valve 5.6. After starting the engine, the valve I4 of the fuel supply pipe 12 is opened to supply light oil to the vibrator IO, and the light oil is atomized and sprayed into the intake pipe 7.

FIG. 2 is a sectional view showing an embodiment in which the spark ignition engine drive system of the present invention is applied to a four-cycle spark ignition engine.

In the figure, 21 is a cylinder, 22 is a connecting rod, 23
is a piston, 24 is a combustion chamber, 25 is an intake pipe, 26 is an intake valve, 27 is an exhaust pipe, 28 is an exhaust valve, and an ultrasonic atomizer 2 similar to that shown in FIG. 1 is installed at a predetermined position in the intake pipe 25. In this embodiment, the ultrasonic atomizer 2 and the fuel are installed together! 11 valve regulating valve 29 is provided.

It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made.

For example, in the above embodiment, gasoline is used when starting the engine, but the invention is not limited to this.
For example, it may be a substance that has a boiling point equivalent to a gasoline fraction, such as a highly flammable chemical product such as thinner, and is primarily liquid in its normal state.

Further, in the above embodiments, light oil is used as fuel; however, the fuel is not limited to this, but includes, for example, petroleum fuel such as kerosene and heavy oil, water emulsion fuel of the petroleum fuel, alcohols such as methanol and ethanol, It is a fuel obtained singly or by mixing synthetic fuels synthesized from coal liquefaction and LNG, and in short, it is a liquid fuel that does not have gasoline as its main component, but whose main component is more than gasoline fraction. It uses fuel.

Further, in the above embodiments, examples are shown in which the present invention is applied to two-stroke and four-stroke engines, but in short, it is applicable to all spark ignition engines, such as rotary engines.

Furthermore, the engine applied according to the present invention is an automobile,
A wide variety of devices can be considered, such as outboard motors, portable power units, and drive devices for consumer heat pump devices.

〔Effect of the invention〕

As described above, according to the present invention, by improving combustibility through atomization of the ultrasonic atomizer, it is possible to use diesel fuel, which is heavier than kerosene, to diversify the fuels used, reduce fuel costs,
Safety can be ensured.

In addition, as an application of ultrasonic atomizers to spark ignition engines, by using a vibrator instead of a diaphragm as in the conventional example, the spray flow rate can be increased, making it possible to operate the ultrasonic atomizer even during normal operation. Moreover, since no vaporizer is used, the mechanism is simplified.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment in which the spark ignition engine drive system of the present invention is applied to a two-cycle spark ignition engine;
FIG. 2 is a cross-sectional view showing an embodiment in which the spark ignition engine drive method of the present invention is applied to a four-cycle spark ignition engine. 1... Spark ignition engine, 2... Ultrasonic atomizer,
14... Intake pipe.

Claims (1)

[Claims] (1) An ultrasonic atomizer is installed in the intake pipe of a spark ignition engine, and when the engine is started, a gasoline fraction or a substance having a boiling point equivalent to that fraction and which is mainly liquid is transferred to the ultrasonic atomizer under normal conditions. After the engine is started, a liquid fuel whose main component is a gasoline fraction or higher is supplied to the ultrasonic atomizer, and the liquid fuel is atomized and sprayed into the intake pipe. A spark ignition engine drive system using an atomizer.