KR19990078634A - Evaporation method and eqipment for fuel - Google Patents

Abstract

The present invention relates to a fuel preheating device, and more particularly, to preheat the liquid fuel supplied to the cylinder of the engine is converted to the gas state, thereby increasing combustion efficiency and reducing fuel consumption by increasing the ignition point of the fuel accordingly. The present invention relates to a fuel preheater capable of achieving the effect.

As a specific means of the present invention for achieving the above object;

In an internal combustion engine having a fuel system comprising a fuel pump, an injector (or fuel injection nozzle) and a fuel pressure regulator,

A fuel preheating pipe having a heat exchange part coiled in the form of a coil and a hydraulic and discharge pipe is installed as an exhaust manifold, and the discharge pipe of the fuel preheating pipe is connected to its own power source and constitutes a hot wire winding part having a short-circuit switch. It is achieved by providing a fuel preheating and vaporization device for preheating the liquid fuel to the gaseous state by the heat action of the exhaust heat of the engine and the heating action of the fuel pump to the injector through the pipe.

Description

Liquid fuel gasification method and apparatus therefor {EVAPORATION METHOD AND EQIPMENT FOR FUEL}

The present invention relates to a gasification method and apparatus of the liquid fuel, and more particularly, the liquid fuel supplied to the fuel system of the internal combustion engine is preheated by a heat source and converted into a gaseous state, and thus the combustibility of the fuel The present invention relates to a method and apparatus for gasifying a liquid fuel that can improve combustion efficiency as well as obtain a fuel saving effect.

In general, a fuel device of an automobile is a device for mixing fuel and air to supply a cylinder. In such a fuel device, a gasoline fuel device is usually a fuel tank for storing fuel, and dust or moisture contained in the fuel. A fuel filter for removing impurities such as impurities, a fuel pump that sends fuel stored in a fuel tank to a carburetor, and a mixture of air and gasoline depending on the operating state of the engine, such as starting, idle, low speed, and acceleration. It consists of a vaporizer which mixes with a ratio and supplies it to an engine (cylinder).

Here, the principle of the vaporizer is to apply a venturi tube using the speed and pressure of the fluid, such a venturi tube is a tube communicating with the subsidiary chamber of the vaporizer and the suction pipe, taking the shape of the narrow central portion,

When the air is passed through the venturi tube, the air velocity is increased, and the pressure in the vicinity of the vent tube drops, so that the pressure in the suction pipe is lowered. Therefore, the fuel is pushed up by the atmospheric pressure acting as the oil surface of the rich chamber, and the fuel injection into the venturi tube is carried out. Will be made.

After that, the fuel is misted by the fast air, becomes a mixer mixed with the air, is pushed into the cylinder, and combustion occurs.

In addition, the fuel device of the diesel engine has a structure that pressurizes the fuel in the fuel tank with a fuel pump to supply the inside of the cylinder through the injection nozzle,

The combustion was performed by injecting and compressing only air in the combustion chamber of the cylinder and then injecting fuel through the injection nozzle.

On the other hand, in recent years, the injection method without the above-described carburetor has been applied, which is to inject fuel in various forms such as batch injection and respective injection by a computer or the like to form a mixture with air. In comparison with the effect of improving the intake passage, it is possible to form an even mixer inside the cylinder, the output per stroke volume is known to have the advantage that the fuel consumption rate is reduced accordingly.

However, the above-described vaporizer and injection methods have different media structures for injecting fuel, but the fuel mixed with air is not sprayed, i.e., fogged, so that the mixture cannot be completely burned. It is difficult to improve the combustion efficiency, because the fuel supply by injection method can reduce the fuel consumption rate, but it is not because the combustion efficiency is improved but because the mixer is supplied evenly into the cylinder. Incomplete combustion over a long period of time in the form of a foreign material such as carbon and at the same time remaining on the inner wall of the cylinder, the combustion efficiency is continuously lowered, in proportion to this has a problem that the fuel consumption rate is lowered.

Therefore, the present invention was devised to solve the general problems of the fuel supply form in the above-described conventional fuel device,

It is an object of the present invention to preheat the liquid fuel of an internal combustion engine mixed with air using a heat source and to change the state into a gas, thereby increasing the combustibility of the mixer to achieve complete combustion and at the same time increasing combustion efficiency and saving fuel. The present invention provides a method and apparatus for gasifying a liquid fuel having an effect.

As a specific means of the present invention for achieving the above object;

Supply process of supplying liquid fuel contained in fuel tank to fuel filter, Pumping process of filtering impurities in liquid fuel and pressurizing it by fuel pump, and vaporization of preheating and gasifying liquid fuel by fuel vaporizer connected to heat source And a gasification method of the liquid fuel which vaporizes the liquid fuel through a mixing process of mixing the vaporized fuel and air supplied through the intake tube to generate a mixer.

In addition, as a specific device means for implementing the gasification method of the liquid fuel;

A fuel supply pipe connecting the fuel pump and the injector to an internal combustion engine having a fuel system including a fuel pump and an injector (or a fuel injection nozzle), forming a vaporization unit or a fuel vaporization pipe electrically connected to a heat source, and passing through the fuel supply pipe. It is achieved by having a fuel vaporization device for preheating and vaporizing a liquid fuel to a gaseous state.

1 is a process diagram showing a liquid fuel gasification method according to the present invention

2 is a block diagram of a fuel preheater according to the present invention

Figure 3 is a state of coupling of the fuel preheating pipe in the present invention

4 is a configuration diagram of a second embodiment of a fuel vaporization apparatus according to the present invention;

5 is a configuration diagram showing a state in which a surge heater is applied to the vaporization unit in FIG.

6 is a configuration diagram showing a state where the PTC heater is applied to the vaporization unit

7 is a configuration diagram showing a state in which a high frequency method is applied to the vaporization unit

8 is a configuration diagram of a third embodiment of a fuel vaporization apparatus according to the present invention;

<Explanation of symbols for major parts of drawing>

S1: Supply process S2: Filtration and pumping process S3: Vaporization process S4: Mixing process

1 fuel preheating and vaporization device 2 fuel tank 3 fuel pump 4 injector

5 fuel pressure regulator 6 intake system 7 cylinder 8 fuel supply pipe

9: multi-gas exhaust pipe 10: fuel preheating pipe 11: inlet pipe 12: discharge pipe

DESCRIPTION OF SYMBOLS 13 Heat exchange part 14 Heat source 91 Primary exhaust pipe 92 Catalytic reactor 93 Silencer 94 Coupling flange 141 Short-circuit switch 941 Pipe insertion hole

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the process of the liquid fuel gasification method according to the present invention, the liquid fuel supply process (S1) and as shown therein; Filtration and pumping process (S2); Gasification process (S3) and gasification; It consists of a mixing process (S4) to create a mixer.

Here, the gasoline electronically controlled fuel injection device (EPI, EFI, EGI, etc.) applied to help the description of the present invention is largely divided into an intake system and a fuel system, and the fuel system includes a fuel pump 3 and an injector ( 4) and the fuel pressure regulator (5), the intake system (6) and the various sensors (atmospheric pressure sensor (RPS), intake air temperature sensor (ATS), air flow sensor (AFS), etc.) automatically controlled by the ECU It consists of a throttle body and a surge tank.

At this time, the supply process (S1) is a process of supplying the liquid fuel (gasoline) filled and accommodated into the fuel tank 2 to the fuel filter 31 connected to the fuel tank 2, such a fuel tank (2) The upper portion of the e) is preferably configured to install an evaporated fuel pipe to discharge the fuel vapor generated in the fuel tank (2), such an evaporated fuel pipe is connected to the air purifier which is part of the intake pipe (6) described above. It is preferable to supply the fuel vapor to the injector (4).

In addition, the filtration, pumping process (S2) is a process of being pressurized by the fuel pump (3) after filtering the liquid fuel supplied through the supply process (S1) in the filter 31,

Wherein the fuel filter 31 is a device for removing the suspended matter or impurities remaining in the liquid fuel, the fuel pump 3 is preferably applied to the electric pump to operate the pump membrane or flanger by the force of the electromagnet. .

In addition, the vaporization process (S3) is a process corresponding to the gist of the present invention, a process of preheating and gasifying the liquid fuel by a heat source at the same time, such a gasification process (S3) is in the following embodiment apparatus It is implemented by

<First Embodiment>

FIG. 2 is a configuration diagram of a fuel vaporization apparatus 1 according to the present invention, as shown therein, between the fuel pump 2 and the injector 4 in which a suction system 6 is connected to form a mixer. The fuel vaporization pipe 10 having the heat exchanger 13 is coupled to each other, and is coupled to the coupling flange 94 to be installed in the exhaust manifold 9.

Here, the fuel vaporization apparatus 1 according to the first embodiment of the present invention applies exhaust heat of exhaust gas discharged through the exhaust manifold 9 as a heat source.

The fuel vaporization pipe 10 has inlet and outlet pipes 11 and 12 formed at one side and the other side, and a heat exchange part 13 having a coil shape is formed at the center thereof. Such a heat exchange part 13 is shown in FIG. 1. As shown in FIG. 2, the inlet pipe 11 is connected to the fuel pump 2, and the discharge pipe 12 is connected to the injector 4 described above. Is connected.

As described above, the heat exchange part 13 installed in the exhaust manifold 9 has a shape of a normal spiral spring, the upper side of which is narrowed, as shown in FIG. It is preferable to be configured to be bent, so that the liquid fuel is sufficiently preheated, vaporized by the exhaust heat passing through the interior,

At this time, the number of windings of the heat exchanger 13 is the number of windings in consideration of the speed of the liquid fuel passing through the fuel vaporization pipe 10 and the temperature (500-550 ° C.) that the gasoline, which is liquid fuel, is ignited and burned without an ignition source. It is preferable to set.

In addition, as a means for injecting the heat exchanger 13 into the exhaust manifold 9, a coupling flange 94 having a tube insertion hole in the side wall as a normal flange is formed, as shown in FIG. The inlet and outlet pipes 11 and 12 of the fuel vaporization pipe 10 are inserted into the pipe insertion hole 941.

Here, copper pipe is applied as a constituent material of the fuel vaporization pipe 10, aluminum is applied as a constituent material of the coupling flange 94, and flows into the pipe insertion hole 941 of the coupling flange 94, When inserting the discharge pipe (11, 12), it is preferable that the minute gap formed is integrally combined with the tube insertion hole (941) and the inlet, discharge pipe (11,12) by a method such as die casting, completely, and closed.

At this time, the exhaust manifold 9 in which the heat exchanger 13 is installed serves to collect the exhaust gas from each cylinder 7 and send it to the exhaust pipe, as shown in FIG. 1. The first exhaust pipe 91 is flanged to the silencer 93 and the flange is coupled to discharge the exhaust gas, in particular, between the primary exhaust pipe 91 and the silencer 93 to prevent pollution by the exhaust gas. To a catalytic reactor (92), a device for forming a porous network as a catalyst material such as Pt, Pd, Pd, Rh, Ru, and Ruthenium to intake air to reburn the exhaust gas. It is configured to have a structure to reburn the exhaust gas,

The work of internally installing the heat exchanger 13 with the exhaust manifold 9 is performed between the flange of the primary exhaust pipe 91 connected to the exhaust manifold 9 and the flange of the exhaust manifold 9. After the 94 is installed, its internal work is performed by fixing it by fixing bolts.

Therefore, the fuel vaporization apparatus 1 according to the present invention having the above connection configuration is to vaporize the liquid fuel in the fuel system,

First, in the initial start-up, fuel is mixed with air as a mist state, as in the normal injector 4, and is supplied to the cylinder 7 for combustion, and the exhaust gas generated by such combustion is exhaust manifold (9). Through each cylinder (7) through

At this time, since the temperature of the exhaust gas discharged through the exhaust manifold 9 has a temperature of 800 ° C. or more, the liquid fuel passing through the internal heat exchanger 13 of the exhaust manifold 9 is heat-exchanged with the exhaust gas. After heating to 200 ° C. or above, the state is changed to gas, and then sent to a mixing process (S4).

Second Embodiment

FIG. 4 is a schematic view showing a second embodiment of the fuel vaporization apparatus 1 'according to the present invention. As shown in FIG. 4, the fuel pump 3 and the injector 4 are connected to each other. It is comprised by forming the vaporization part A which uses its own power supply as a heat source.

Here, the fuel vaporization apparatus (1 ') according to another embodiment of the present invention is the same as in the above-described one embodiment to preheat the fuel gasification, but the battery or generator, such as a heat source 14 mounted on the vehicle Is applied.

At this time, the vaporization unit (A) electrically connected to the heat source (DC 12V, DC 24V, AC 110V, AC 220V) is in the fuel system, as shown in Figure 3, the high pressure in the fuel pump (3) It is installed in the fuel supply pipe (8) for supplying and feeding fuel to the injector (4),

This type of vaporization unit (A) is configured by winding a heating wire electrically connected to its own power source a plurality of times around the outer periphery of the fuel supply pipe (8), or as shown in Figure 5 the fuel supply pipe (8) Surge heater ((A ') SURGE HEATER) method is applied to split and connect the liquid fuel to the inlet and the outlet of the vaporization chamber in which the hot wire coil is wound, and to vaporize the liquid fuel through the nozzle.

In addition, as shown in FIG. 6, a conventional P.C.T heater ((A ") POSITIVE TEMPERATURE COEFFICIENT THERMISTOR (consisting of barium titanate as a main component and adding a trace amount of a rare earth element such as lantern, cerium, etc. (A heater in which a ceramic semiconductor is embedded) or a heating wire connected to the secondary coil is wound on the ceramic rod as shown in FIG. 7, but the liquid fuel is gasified by flowing the liquid fuel in a direct manner along the heating wire. High frequency method (A '") is applied,

Here, the vaporization portion (A) is formed by winding the heating wire as described above is to be configured so that the wound itself length (heating wire winding length) has a length of at least 10cm, and accommodates this into the case, each shape (heating wire , The vaporization unit (A, A ', A ", A'") consisting of surge heater, constant temperature coefficient regulator, and high frequency type), and also the winding length of the vaporization chamber and the heating wire so as to vaporize the liquid fuel by sufficient heating. It is preferable to set.

In addition, the above-described vaporization units A, A ', A ", A'" of each form constitute a short-circuit switch 141 to control the application of power, and the vaporization units A, A ', A ", A One side of the case is provided with a temperature sensing document so that the safety of the fuel supply pipe 8 or the vaporization chamber in which the heating wire is wound is not overheated, and safety is considered, and the contact point of the short-circuit switch 141 is located at one side of the driver's seat. By configuring a separate operation button for controlling the position, it is desirable to allow the driver to operate it as needed.

Therefore, the fuel vaporization apparatus 1 'according to the second embodiment of the present invention having the above connection configuration is to change the liquid fuel passing through the fuel supply pipe 8 into a gaseous state.

First, at initial start-up, the control button of the short-circuit switch 141 provided in the driver's seat is controlled and operated before starting, so that power is supplied to the vaporizers A, A ', A ", A'". By heating the fuel supply pipe (8), and then starting,

At this time, the liquid fuel passing through the fuel supply pipe 8 is heated in a vaporization unit (A, A ', A ", A'") at a temperature of 800 ° C. or more, and then is changed into a gaseous state and then supplied to the next process.

Third Embodiment

As shown in FIG. 5, a configuration diagram showing three embodiments of the fuel vaporization apparatus 1 ″ according to the present invention is provided so that the above-described embodiments 1 and 2 may be selectively or simultaneously used.

First, as in the first embodiment described above, the fuel pump 3 and the injector 4 are connected by the fuel vaporization pipe 10, but the heat exchange part 13 of the fuel vaporization pipe 10 is connected to the coupling flange 94. By means of the exhaust pipe 12 of the fuel vaporization pipe 10 which is connected to the injector 4 in the state of being built in the exhaust manifold 9 by the vaporization parts A, A ', A ", A' applied in the second embodiment. "), So that the exhaust heat and its own power source can be used selectively or simultaneously.

The fuel vaporization apparatus 1 "according to the third embodiment controls and operates the control button of the driver's seat as described above before starting the power, and supplies the power to the vaporization units A, A ', A", A' ". When the discharge pipe 12 of the fuel vaporization pipe 10 is heated by applying, the engine is started. Thus, the liquid fuel passing through the discharge pipe 12 is vaporized (A, A ', A ", A'" before starting). As it is heated at), the liquid fuel changes to a gaseous state,

At this time, when the control button applies power to the vaporizers A, A ', A ", A'" only for the set time as described above, after the combustion is first performed in the cylinder 7, it is exhausted. In the heat exchange part 13 built into the engine 9, the liquid fuel is gasified, and if necessary, power is continuously supplied to the vaporization parts A, A ', A ", and A'". As described above, the fuel may be gasified in the heat exchange unit 13 and the discharge pipe 12 in the first and second orders.

On the other hand, the final step mixing step (S4) is a process of mixing the fuel gasified through the vaporization step (S3) and the air supplied through the intake pipe (6) to create a mixer, this mixing step (S3) In the injector 4,

In this way, the fuel whose state changes to gas is 28 times larger than the volume in the liquid state, and thus the air-fuel ratio different from the air-fuel ratio applied to the conventional gasoline is applied.

That is, at least the amount of fuel that is less than the theoretical air-fuel ratio (air amount 1: fuel amount 14.7) must be adjusted at start-up or at low speed and high speed operation. The amount of air is measured to determine the basic injection time, the fuel injection time and the ignition timing are corrected by measuring the atmospheric pressure, and the fuel injection amount is adjusted by detecting the temperature of the intake air.

Then, the throttle position sensor (TPS) composed of a throttle body detects the opening angle of the throttle valve, and the mixer whose injection amount is corrected is controlled by the fuel pressure regulator (5) composed of the heads of each cylinder (7) in the engine room. It is supplied to the cylinder in a state of being burned.

At this time, the fuel vaporization apparatus 1 according to the first embodiment described above continues with the vaporization of liquid fuel supplied through the fuel vaporization pipe 10 using the exhaust gas discharged through the multi-gas exhaust pipe 9 as a heat source. By supplying the vaporized fuel to the injector 4 through a routine repetition process, a mixture of air and a gaseous state is achieved, and in the case of the second embodiment, the liquid fuel also increases in volume than the liquid state as in the first embodiment. As the state is changed to the gas, the combustibility is improved, and thus the same action and effect as in the above-described embodiment can be obtained by mixing with air in the injector 4 to form a mixer.

Therefore, the mixer produced by the liquid fuel gasification method according to the present invention takes the form of a complete gas in which gaseous fuel and air are mixed, so that self-combustibility is increased, so that when the combustion in the cylinder 7 is completed, Combustion is made, and as described above, the air-fuel ratio that is close to the air-fuel ratio of the conventional gaseous fuel according to the volume change of the fuel can reduce the fuel.

On the other hand, the gasification method and apparatus of the liquid fuel of the present invention having such a configuration can be applied not only to the gasoline engine described as an example of the internal combustion engine, but also to the diesel engine, which is described above between the fuel pump and the injection nozzle. The gasoline engine and the above-described gasoline engine are provided by converting the fuel into a gaseous state at a temperature suitable for taking into consideration the ignition point of the petroleum, which is the fuel, by installing the fuel vaporization pipe having the vaporization part or the heat exchange part according to the embodiments of the present invention. The same action and effect can be obtained.

As described above, the fuel preheater according to the present invention converts the fuel supplied to the injector into the gas state by using a heat source (exhaust heat, battery, generator, etc.), thereby increasing the volumetric increase and the combustibility of the fuel. Since the mixer is also formed in a gaseous state, it is supplied to each cylinder, and as a result, the combustion efficiency of the mixer can be increased to achieve the maximum combustion, and thus the combustion efficiency and the fuel saving effect can be obtained. It can provide very significant expectations.

Claims (3)

Supply process (S1) for supplying the liquid fuel contained in the fuel tank (2) to the fuel filter 31, the pumping process (S2) for filtering the impurities in the liquid fuel and pressurized by the fuel pump (3), and the heat source ( Evaporation process (S3) for preheating and gasifying the liquid fuel by the heating means having a 14), and mixing process for mixing the vaporized fuel and air supplied through the intake pipe in the injector (4) to generate a mixer (S4) Gasification of liquid fuel to gasify the liquid fuel through). The exhaust pipe (9) according to claim 1, wherein the fuel vaporization pipe (10) having a heat exchange part (13) in the form of a coil is connected to an exhaust manifold (9) through which exhaust of each cylinder (7) is performed by heating means of the vaporization process (S3). 94, wherein the inlet pipe 11 of the fuel vaporization pipe 10 is connected to the fuel pump 2, the discharge pipe 12 is connected to the injector 4, the fuel vaporization Fuel evaporator (1), characterized in that for preheating and vaporizing the liquid fuel supplied from the fuel pump (3) to the injector (4) through a pipe (10) in a gaseous state. The vaporization unit (A, A) according to claim 1, wherein the fuel supply pipe (8) connecting the fuel pump (3) and the injector (4) to the heating means in the vaporization process (S3) uses its own power source as the heat source (14). ', A', A '"), and the fuel vaporization apparatus 1' characterized in that the liquid fuel passing through the fuel supply pipe 8 is preheated and vaporized in a gaseous state.