JPS6245966A - Fuel spray mechanism in gasoline engine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to improvements in fuel spray mechanisms in gasoline engines.

The intake system of an internal combustion engine greatly affects the engine's performance and fuel consumption. Complete combustion of fuel in a gasoline engine is ideal for engine combustion efficiency.

Typically, the fuel particles in the gas mixture blown from the intake pipe into the intake manifold are not sufficiently finely divided, causing smoke and excessive fuel consumption in gasoline engines.

In order to improve the above-mentioned problem, this invention provides a vortex generating pot in the carburetor, more precisely between the intake manifold and the carburetor, and also provides an intake pipe for blowing out secondary air. This blown out secondary air makes the mixed gas particles even finer, and the fuel gas taken into each cylinder is equally distributed to improve the output of the gasoline engine.

Conventional technology Fuel taken into a gasoline engine is blown out from the main nozzle and atomized by air pressure along with these fuel particles, but if the range of maximum combustion efficiency of the fuel particles is narrow, complete combustion may not be achieved due to changes in engine speed. Since this is not achieved, it not only causes soot but also excessive fuel consumption.

Several devices have been developed to improve this drawback, but
In many of these systems, a heater member is installed between the carburetor and the intake manifold, and the mixed gas is further atomized by heating.

However, the reason why the use of this device was avoided by users is that the device cannot virtually control the intake system to obtain the maximum efficiency, and the temperature of the mixed gas passing through the heater remains constant due to the flow rate. This is due to the inability to maintain the energy efficiency of these devices, and their efficiency is quite low despite their rather complex structures.

For example, the air and fuel valves are set relative to the heat at maximum engine speed, so when the engine speed is changed to a lower speed, the heater temperature will change accordingly, but the gas mixture at lower engine speeds will change accordingly. The mixture ratio at the air valve and fuel valve is the same as the original setting and passes through the heater, which causes a decrease in combustion efficiency.

The essential drawback is that the engine is heavily overloaded during long periods of operation. That is, if heat returns from the engine to the intake pipe, the cooling effect of the engine will be reduced.

As mentioned above, atomizers that atomize while heating the mixed gas blown out from a vaporizer are common, so power for these purposes can be obtained from an electric heater supplied from another power line or from an engine. A device that utilizes waste heat is required. Therefore, not only the structure of the device is complicated, but also the failure rate is high.

Problems to be Solved by the Invention To achieve this, it is possible to further atomize the mixed gas by introducing secondary air from outside without using a heater, and by generating a vortex to mix the gas. be. Focusing on the above points, the present invention installs a vortex generation pot in the mixed gas flow path and attaches an intake pipe to the pot, so that the mixed gas sucked through the throttle valve is transferred to the vortex generation pot. The mixed gas is mixed again with a fresh secondary air flow from the outside air, and the mixed gas stream is further atomized to increase the mixing ratio of oxygen in the mixed gas, and is also inhaled into each intake manifold. This greatly increases the combustion efficiency of a gasoline engine by reducing the pressure difference between the mixed gases and distributing the fuel gas equally to each cylinder.

Means for Solving the Problems This invention will be described in detail with reference to an embodiment. As shown in FIGS. A vortex generating pot (4) is installed between ), and an intake pipe (5) is fixed downwardly to the center of the vortex generating pot while maintaining an appropriate distance to the upper surface of the pot, and the other end of this intake pipe ( 6) is a vaporizer (
2) is extended to the outside and opens to the atmosphere via the air filter On. Then, the other end of the intake pipe (5) (
6), a steel ball (7) is pressed outwards by a coil spring (8) to form a flow control valve, as can be seen in FIG.

In this case, the method of fixing the intake pipe (5) is to sandwich the support board (9) between the flanges on the intake manifold (1) and carburetor (2) sides, and then attach the support board (9) to the intake pipe (5).
), and the intake pipe (5)
It is convenient for disassembling the vortex generating pot (4), etc. The support board (9) is made of a certain metal plate of suitable thickness and is inserted between each flange (3) of the intake manifold (1) and the carburetor (2).

The vortex generating pot preferably has a planar surface as shown in FIG. 2(A) and a concave cross section having the shape of a spoon according to test results.

The operation and effects of the device according to the present invention will be explained below.

Since the vortex generating pot (4) is fixed between the intake manifold (1) and the carburetor (2), the original mixed gas taken in from the carburetor flows through the intake pipe (5) within this pot.
) is mixed with secondary air blown out from the intake manifold (1), and the suction force from the intake manifold (1) and the vortex generating pot (
4) The flow velocity is accelerated by the collision with the cylinder of the engine, and at the same time, a swirling phenomenon of the mixed gas occurs in the vortex generation pot due to the suction force of the engine cylinder via the intake manifold, and each intake air to each cylinder of the intake manifold is By making the pressure difference at the mouth relatively small, the swirl pots ultimately serve to equalize the distribution of fuel gas drawn into each cylinder.

On the other hand, the other end of the intake pipe (5) fixed to the vortex generating pot is extended to the outside of the carburetor, and air from the outside atmosphere is drawn in by the suction force of the cylinder through the intake manifold.

The other end of the intake pipe (5) is formed into a spherical valve that presses a ball with a coil spring, and the opening of the valve is automatically controlled by the flow rate of the mixed gas sucked into the intake manifold. Air flow to the device is automatically controlled.

Therefore, the suction flow rate into the intake manifold at which the mixed gas passes through the throttle valve provided in the intake manifold changes proportionally depending on the opening ratio of the throttle valve. For example, if the engine is running at its lowest speed with the throttle valve almost closed, not only will the flow rate of the gas mixture be slower, but the amount of gas mixture will also be smaller and the vortex will be reduced as less of the gas mixture hits the swirl pot. The winding phenomenon is proportionally reduced, and the suction force and the amount of air sucked in through the suction pipe are proportionally less sucked.

Conversely, when the intake manifold throttle valve is fully open, not only will there be more acid in the gas mixture, but the flow rate will also be faster. Therefore, not only the amount of the mixed gas impinging on the vortex generating pot increases, but also the suction force and collision force increase, the fuel particles are atomized and evaporated to become smaller, and the amount of air suction increases.

In the above embodiment, the vortex generating pot is made of copper having excellent thermal conductivity, and is fixed near the intake manifold.

Therefore, the vortex generating pot can receive engine heat through the intake manifold and maintain a high temperature state, and all the particles of the mixed gas that collide with the vortex generating pot are evaporated at the same time, which has the effect of making the fuel particles more atomized. There is.

As described above, the present invention makes it possible to expect the highest combustion efficiency of a gasoline engine by making vaporized fuel particles finer and supplying the mixed gas proportionally according to engine speed adjustment. This has the advantage that by equalizing the distribution of fuel gas taken into the cylinders, it is possible to expect an improvement in the output of the gasoline engine.

In order to demonstrate the effects of the device of this invention, a vortex generating pot (4), which is the device of this invention, was installed between the carburetor (2) and the intake manifold (1) of the engine, as shown in Fig. 4. When measurements were taken under each condition by attaching an overcurrent brake type engine power meter α force to the output shaft of the engine, (1) The eddy current generating pot was shaped as shown in (a) in Figure 2. This type is the most efficient, and the brake fuel consumption rate when using this type of brake is 1 on average compared to the conventional type that does not have a vortex generating pot when the rotation button is rotated from 1,200 to 3,400 revolutions.
It was found that the amount decreased by 0.4 N.

(2) As is clear from FIG. 5, the pressure difference at each intake port Pi, Pg, P3, P4 for each cylinder of the intake manifold is relatively small in the device provided with the device of the present invention; This is significantly different from the conventional model that does not have a vortex generating pot.
The vortex generating pot in this invention has the effect of equalizing the distribution of fuel gas taken into each cylinder.

As described above, the present invention has a simple configuration and can greatly increase the fuel combustion efficiency of a gasoline engine.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, FIGS. 1A and 3B are a cross-sectional front view and a cross-sectional plan view of the vortex generating pot portion, respectively, and FIGS. )
3 is a plan view and a sectional view showing each side of the vortex generating pot, FIG. 3 is a sectional front view showing the main part of FIG. 1(A), and FIG. 4 is an experiment in which the device of this invention is installed FIG. 5, which is an explanatory drawing showing an example of the apparatus, is a comparison diagram showing the pressure difference at each intake port of each cylinder between the apparatus of the present invention and the conventional apparatus, which were revealed by the above-mentioned experimental apparatus.

Claims (3)

[Claims] (1) A vortex generation pot that is perpendicular to the mixed gas flow path and blocks the center of the flow path is installed between each connecting flange that connects the intake manifold and the carburetor, and the tip of the vortex generation pot reaches the top surface of the vortex generation pot. A fuel spraying mechanism in a gasoline engine that is constructed by inserting and supporting each intake pipe whose end communicates with the outside air via a flow rate control valve. (2) The fuel spraying mechanism for a gasoline engine according to claim 1, wherein the vortex generating pot is shaped like a spoon with a hemispherical concave upper surface and is made of a material with high thermal conductivity. (3) Fuel spray in the gasoline engine according to claim 1, wherein the intake pipe and the vortex generating pot are supported between the connecting flanges via a metal support board sandwiched between the connecting flanges. mechanism.