JPS6022188B2 - Modified LPG mixture production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for producing a modified LPG mixture.

``Advanced technology'' Conventionally, to improve the combustion of engines that use LPG as fuel, a very small amount of hydrocarbons with a higher molecular weight than LPG such as diesel oil (hereinafter simply referred to as diesel oil, etc.) has been supplied to the engine or the intake pipe of the engine. It is known to be effective.

``Problems to be solved by the invention'' However, since the best way to increase combustion efficiency is to control the amount of light oil supplied to a very small amount compared to the engine displacement, this cannot be achieved. No satisfactory device has been provided.

Additionally, if this light oil is supplied while the engine is running at low speeds such as idling, it may cause carbon to form inside the engine, which also has the disadvantage of reducing combustion efficiency. This was revealed as a result of the experiment.

Therefore, the present invention has been made in view of the above, and an object of the present invention is to provide an apparatus for producing reformed LPG Nami-Aiki that can supply the most optimal amount of light oil, etc., into the intake pipe according to the engine speed. The purpose is to

``Means for Solving the Problems'' In accordance with the above-mentioned object, the structure of the present invention, the gist of which is defined in the preceding claims, aims to solve the above-mentioned problems by introducing A conduit 3 connects the downstream part of the pipe from the throttle valve and a tank 2 containing a hydrocarbon liquid 1 with a higher molecular weight than LPG. A filter 5, a valve 7 that shuts off the conduit 3 when the engine rotational speed falls below a predetermined value, a check valve 10, and a mixer 11 are interposed, and the mixer 11 has an air intake port via a constant pressure valve 13. This is a technical measure in which the number 12 is arranged.

``Function'' Therefore, when the engine speed is low and supply of light oil, etc. is unnecessary and inappropriate, the device of the present invention shuts off the supply by valve 1, and when the engine is accelerating or rotating at a constant speed. The valve 7 opens only during high-speed rotation, such as when the engine rotates at high speed, and light oil or the like can be supplied.

In addition, the light oil, etc. is mixed with air in the mixer 11 to form a mixture that is sucked and supplied to the intake pipe, so the intake pipe is not a mixture of substances with different properties such as a gas-liquid mixture, but a mixture of LPG and air. The air-fuel mixture has the same properties as the air-fuel mixture and light oil etc., making it possible to mix the gases easily and uniformly.

Furthermore, when the device of the present invention suctions and supplies light oil, etc. to the intake pipe with the negative pressure of the engine, the air intake port 12 of the intake pipe 11
Since more air is sucked together, the amount of light oil, etc., sucked can be limited according to the amount of air taken in. In other words, the amount of light oil, etc. sucked can be controlled to a small amount by the amount of air taken in.

``Embodiment'' Next, an embodiment of the present invention will be described in accordance with an embodiment in which LPG is used as fuel for a gasoline automobile engine shown in the accompanying drawings.

In the figure, 2 is a tank that stores a liquid 1 of a hydrocarbon having a higher molecular weight than LPG, which is generally referred to as light oil, and is placed at an appropriate location such as near an engine (not shown). The above tank 2 and
A conduit 3 connects the intake pipe of the carburetor of an engine that uses LPG as fuel, downstream from the throttle valve.
When the engine rotates and the inside of the intake pipe 3 becomes negative pressure, the liquid 1 in the tank 2 is sucked and supplied into the intake pipe through the conduit 3 due to the negative pressure.

In the middle of the conduit 3, a filter 5 is provided from the upstream side.
A valve 7, a check valve 10, and a mixer 11 are interposed to shut off the conduit 3 when the engine speed falls below a predetermined value.

This filter 5 is intended to prevent foreign matter such as dust mixed into the liquid 1 from having an adverse effect on the valve 7 and check valve 10 on the downstream side, and to prevent these foreign matter from being fed into the engine. Any conventionally known device may be used to prevent this from occurring, and furthermore, unlike the illustrated example, it is of course possible to arrange multiple stages in parallel in the middle of the conduit 3. Further, the valve 7 is configured to shut off the conduit 3 when the rotation of the engine falls below a predetermined level by a control unit 9 provided in the engine. This control unit 9 detects, for example, current and radio waves generated by opening and closing points on the primary side of the engine, and uses this as an input signal to control the solenoid 8 when the engine reaches a certain rotation speed (180 rudder PM in the example). Adjustment is made so that the valve 7 opens when electricity is applied, and closes at lower rotational speeds. In the illustrated example, a needle valve 6 is arranged upstream of this valve 7, but this is intended to limit the amount of liquid 1 supplied to the downstream side of the conduit 3 to a very small amount. However, if the conduit 3 is sufficiently narrow and there is no need to worry about an unnecessary amount of liquid being delivered to the downstream side, it may be omitted. Furthermore, the mechanism for opening and closing the valve 7 according to the engine speed is not limited to the example illustrated above, and various mechanisms that are possible with conventional technology can be used, such as opening and closing the energizing circuit of the solenoid 8 using a tachometer. . Furthermore, the check valve 10 is such that the liquid 1 can only flow toward the downstream side of the conduit 3.

This is because when the pressure inside the mixer 11 on the downstream side changes depending on the running condition and the internal pressure increases, gas enters the part that was the main liquid into the valve 7, needle valve 6, and filter 5. This is to prevent the possibility that the condition of the conduit 3 may change and the amount of liquid 1 supplied may fluctuate. The mixer 11 is provided with an air intake 12 via a constant pressure valve 13.

This mixer 11 uses the principle of a conventionally known two-fluid nozzle, and is designed to disperse the liquid 1 into suction air.
A constant pressure valve 13 is interposed which opens the air intake port 12 when the pressure inside the air intake port 1 falls below a predetermined pressure. Furthermore, it goes without saying that this air intake port 12 is provided with an air cleaner 2a to prevent dust and the like from being sucked in. In addition, 4 in the figure is a plate interposed in the middle of the intake pipe, which is called "hollow part 4a".
coincides with the inner wall of the intake pipe, and the conduit 3 is inserted from the side surface of the plate 4 into the hollow portion 4a while maintaining airtightness.

A pongee hole 15 is provided near the tip end of the conduit 3 in the hollow portion 43, and the liquid The air-fuel mixture is dispersed evenly. ``Effects of the Invention'' The device of the present invention is as described above, and when the engine speed is low and the supply of light oil, etc. is unnecessary and inappropriate, the supply is stopped by the valve 7.
The valve 7 opens only when the engine is accelerating at a high speed and can supply light oil, etc., so the light oil, etc. is not combusted and generates a power bomb, and there is no HC, etc. in the exhaust gas. No Co or the like is generated.

In addition, in the device of the present invention, light oil and the like are mixed with air in the mixer 11 to form a mixture that is sucked and supplied to the intake pipe. The mixture of LPG and air has the same properties as the mixture of light oil, etc. and air, so it is possible to mix the gases easily and uniformly. It is possible to produce a reformed LPG mixture with good combustion efficiency.

Furthermore, in the present invention, the air intake port 1 of the mixer 11 when sucking and supplying light oil etc. to the intake pipe with the negative pressure of the engine.
Since air is sucked in from 2, the amount of light oil, etc. sucked can be limited according to the amount of air intake.In other words, the amount of light oil, etc. sucked can be controlled to a small amount by the amount of air taken in. It is possible to control the amount of fish to an extremely small amount, 200
Using 2~3cc (delivery amount of diesel oil, etc.) of diesel oil (mileage) in a car with a 0cc engine, the relative
25% fuel savings, NO skin, HC, Co in exhaust
could be reduced by 10 to 20%, respectively.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of the device of the present invention, and Fig. 2 is a
It is a line enlarged sectional view. 1...liquid, 2...tank, 3...conduit, 4... ...Plate, 5...Filter, 6...Needle valve, 7...
... Valve, 8 ... Solenoid, 9 ... Control unit, 10 ... Check valve, 11 ... Mixer, 12 ... Air intake, 13 ... Constant Pressure valve.
Figure 1 Figure 2

Claims (1)

[Claims] 1 A conduit 3 connects the downstream side of the throttle valve of the intake pipe of the carburetor of an engine that uses LPG as fuel and a tank 2 that stores a hydrocarbon liquid 1 with a higher molecular weight than LPG. In the middle of the conduit 3, from the upstream side, there is a filter 5, and a filter 5 that closes the conduit 3 when the engine rotation speed becomes below a predetermined value.
An apparatus for producing a reformed LPG mixture, which includes a valve 7 for shutting off the air, a check valve 10, and a mixer 11, and the mixer 11 is provided with an air intake port 12 via a constant pressure valve 13.