JP2003278571A - Fuel feed method and apparatus for engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel feed method and apparatus enabling smooth operation of an engine without trouble. <P>SOLUTION: According to this fuel supply method and apparatus for the engine, a first fuel composed of at least one kind from light oil, kerosene, lubricating oil, waste oil and heavy oil and water or a second fuel composed of at least one kind from light oil, kerosene, lubricating oil, waste oil and heavy oil are replaced with each other to be supplied to a fuel injection pump. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an engine fuel supply method and apparatus.

[0002]

2. Description of the Related Art Engines, especially diesel engines, are used in automobiles, diesel cars, generators, ships, agricultural machinery, construction equipment and the like. By the way, when water is added to the fuel, the fuel efficiency can be improved to significantly reduce the fuel consumption, and further, the amount of NOx generated with the fuel can be reduced. However, there has been a problem that light oil, kerosene, lubricating oil, waste oil and heavy oil mixed with water cannot always be smoothly burned. In particular, there is a problem that trouble occurs at low speed rotation.

[0003]

SUMMARY OF THE INVENTION The invention of the present application is to eliminate such troubles during the operation of the engine. It is preferable that the fuel components are different depending on the rotation of the engine and there is no water at low speed. Further, they found that there is no particular problem even if there is water at high speed, and completed the invention of this application.

[0004]

Means for Solving the Problems The invention of the present application comprises at least one of light oil, kerosene, lubricating oil, waste oil and heavy oil,
First fuel consisting of water, or light oil, kerosene, lubricating oil,
The present invention relates to an engine fuel supply method and apparatus for exchanging a second fuel composed of at least one of waste oil and heavy oil and supplying the second fuel to a fuel injection pump. The amount of water is preferably 3 to 30% by volume, particularly preferably 5 to 20% by volume based on light oil, kerosene, lubricating oil, waste oil and heavy oil.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the invention of this application, the first engine fuel can include alcohol. Water can be mixed well with other fuels by adding alcohol. The alcohol is preferably methanol or ethanol. The alcohol content is preferably 5 to 20% by volume with respect to water. The alcohol may be mixed at any stage before the fuel is supplied to the engine, but it is preferable to mix the alcohol and water in advance.

According to the invention of this application, the fuel for the first engine is supplied to the fuel injection pump at the time of high speed in the case of an automobile, and at the time of high speed rotation in other cases, and the fuel for the second engine is the case of an automobile. At low speed or idling,
In other cases, it is supplied to the fuel injection pump during low speed rotation. By exchanging the two types of fuels and supplying them to the engine in this way, it is possible to prevent the engine from stopping at low speed or at low speed rotation. The low speed in the case of an automobile is 10 to 15 km / hour or less, the low speed rotation in other cases is 800 to 1000 revolutions / minute or less, and the high speed in the case of an automobile is 10 to 15 km / hour. It is a speed exceeding time, and high speed rotation in other cases is 800 to 1
It means exceeding 000 revolutions / minute. When the fuel containing water remains in the piping, fuel filter, etc., when stopping the engine, switch the fuel to a fuel not containing water in advance so that the fuel containing water does not remain in the piping etc. It is preferable.

In the invention of this application, it is particularly preferable that water and light oil are mixed before being injected into the engine. By doing so, it is not necessary to provide a fuel tank in which water and light oil are mixed in advance.

In the invention of this application, the first engine fuel and the second engine fuel are injected into the engine via the fuel injection pump. By opening and closing the valve valve between the fuel injection pump and the mixing tank and the tank valve for light oil, kerosene, lubricating oil, waste oil, heavy oil, etc., fuel mixed with water or fuel not mixed with water can be supplied to the engine. Can be supplied. Further, by mixing water with light oil or the like, it is possible to supply a fuel that does not separate water to the engine.

In the invention of this application, it is particularly preferable that the engine is for an automobile. In particular, since air pollution by automobiles has become a problem in urban areas, air pollution in urban areas can be reduced.

Light oil, kerosene, lubricating oil, waste oil, heavy oil and the like used in the present invention are particularly preferably light oil, but the waste oil is not particularly limited as long as it has a viscosity equal to or higher than that of light oil. In addition, heavy oil, from heavy oil A to heavy oil bunker, can be used according to the intended use. Further, the blending amounts of these various oils can be appropriately determined according to the application.

The mixer of the present invention may have a known shape. The mixer for the fuel tank of the invention of the present application is only required to be able to mix the fuel, and is preferably a stirrer or an air injector.

The stirrer may be a reflux type or any method such as rotating plate blades or propeller blades. The size and number of blades to be rotated, or their shape can be appropriately designed. Also, the blades may be angled. The mixing may be continuous or intermittent.

In the mixer, by reducing the area of the bottom of the tank, when the stirring blade is provided at the bottom, the size of the blade can be reduced.

When vibration occurs due to engine start-up or the like, mixing naturally occurs depending on the type of oil.
The mixer can be stopped. The oil is particularly preferably light oil.

In particular, in the case of an automobile, a fuel in which water is not mixed is used at low speed or idling, and the fuel mixed with water is exchanged and supplied to the engine at the time of high speed running. The fuels entered can also be mixed and the mixer can be run weakly.

[0016]

EXAMPLES The invention of this application will be specifically described below with reference to examples. FIG. 1 is a schematic view of the invention of this application,
1 is a light oil tank, 2 is a valve valve 1 for adjusting the amount of light oil supplied, 3 is a mixer, 4 is a motor, 5 is a mixing tank,
6 is an alcohol tank, 7 is a water tank, 8 is a valve valve 2 or 9 for adjusting the supply amount of water or water containing alcohol.
Is a fuel filter, 10 is a fuel injection pump, 11 is a valve valve 3, 12 is a valve valve 4, 13 is a valve valve 5, 14 is a valve valve 6 and 15 is a float, respectively. It should be noted that an alcohol tank may or may not be provided, and in Example 1, there is no alcohol tank.

The ratio of light oil and water is adjusted by the valve valves 1 and 2 of the valve 2. The valve valve 3 of 11 is for switching between mixed oil and light oil, and the float is for keeping the amount of mixed oil constant. The valve valve 3 of 11 is for light oil during idling and for high speed during idling. This is to switch to mixed oil when traveling. Also, the switching method is to detect the signal with a speed sensor, or a mechanical method with an accessory wire, etc.
A speed sensor is preferred. If water and light oil remain in the fuel injection pump or in the piping for a long time due to oil switching, the light oil and water are separated and the engine start is deteriorated. These troubles can be prevented by replacing the light oil with light oil. It is preferable to perform idling for several minutes before stopping the engine, for example, it is preferable to automatically perform idling. Engine is on
The stirring is started at the time when
The valve valve 3 of 3 opens and closes in conjunction with the float. The piping of the valve valve 3 of the fuel injection pumps 10 and 11 is preferably shortest. Further, it is preferable to stir water, alcohol, and light oil when fuel is used, not when fuel is not used, and intermittently. Fuel filter 9
May be provided only in the flow path for filtering light oil and water, but it is preferable to separately provide the flow path for filtering light oil and water and the flow path for filtering light oil in each flow path.

When the engine is running at low speed or the vehicle is idling or running at low speed, light oil is supplied to the fuel injection pump 10 via the fuel filter 9 by the valve valves 3 of the light oil tanks 1 to 11, and only light oil is supplied to the engine. Is burned. Next, when the engine shifts to high speed rotation,
12 valve valves 4 and 13 valve valves 5 are opened, water and light oil containing alcohol are supplied to the mixing tank 5 as the case may be, and water and light oil containing alcohol are supplied via the fuel filter 9 to the valve valve 11 3 is supplied to the fuel injection pump 10 and burned. Occasionally, water containing alcohol and light oil are stirred intermittently. Excess fuel of the fuel injection pump 10 is returned to the mixing tank 5 by the valve valve 6 of 14 for the light oil in which water containing alcohol is mixed, and to the light oil tank 1 for the light oil in which water is not mixed. .

Example 1 The fuel composition of an automobile is idling and only light oil at a low speed of 15 km / hour, and 10% of water and 90% of light oil at a high speed of more than 15 km / hour. )Met.

Example 2 The fuel composition of an automobile is idling and only light oil at a low speed of 15 km / hour, and water 9%, alcohol 1%, light oil 90% at a high speed rotation exceeding 15 km / hour. (Both in volume%).

Comparative Example In Examples 1 and 2, idling, 15 km /
When water or light oil mixed with water and alcohol was used at low speed, the engine sometimes stopped.

[0022]

According to the invention of this application, smooth operation can be performed without engine trouble. Also, light oil, kerosene, lubricating oil, waste oil and heavy oil mixed with water or water mixed with alcohol is cheaper than conventional light oil, kerosene, lubricating oil, waste oil and heavy oil, and the exhaust gas is also clean. ,
It has the excellent effect of improving output and improving fuel efficiency.

[Brief description of drawings]

FIG. 1 is a schematic diagram of the invention of this application.

[Simple explanation of symbols]

1 light oil tank 2 valve 1 3 mixer 4 motor 5 mixing tank 6 alcohol tank 7 water tank 8 valve 2 9 Fuel filter 10 Fuel injection pump 11 valve valve 3 12 valve valve 4 13 valve valve 5 14 valve valve 6 15 floats

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02D 45/00 F02D 45/00 310N F02M 25/00 F02M 25/00 P 25/022 37/00 341B 37 / 00 341 341C 341H 43/00 43/00 25/02 AF terms (reference) 3G066 AA07 AB02 AB03 AB04 AB06 AB08 BA17 BA25 BA61 DB11 DC09 DC25 3G084 AA01 AA05 AA06 AA08 BA11 CA07 CA09 DA10 DA34 FA05 FA33 3G092 A03 AB08 AB05 AB08 AB12 AB14 AB15 AB17 BB20 DE10S DF09 EA11 FA24 FA50 GB02 GB03 HE01Z 3G301 HA02 HA21 HA23 HA24 JA25 JA31 KA23 KA24 KA25 KB03 KB04 LB00 PB02Z PE01Z PF01Z

Claims (8)

[Claims] 1. A first fuel comprising at least one of light oil, kerosene, lubricating oil, waste oil and heavy oil and water, or light oil,
A method for supplying fuel to an engine, characterized in that a second fuel made of at least one of kerosene, lubricating oil, waste oil and heavy oil is exchanged and supplied to a fuel injection pump. 2. The engine fuel supply method according to claim 1, wherein the first engine fuel contains alcohol. 3. The first engine fuel is supplied at high speed or high speed rotation, and the second engine fuel is supplied to the fuel injection pump at idling or low speed or low speed rotation. The fuel supply method for an engine according to 1 or 2. 4. The fuel supply method for an engine according to claim 1, wherein the fuel is mixed before being supplied to the fuel injection pump. 5. The engine fuel supply method according to claim 1, wherein the second engine fuel is supplied to the fuel injection pump before the engine is stopped. 6. The fuel supply method for an engine according to claim 1, wherein alcohol is mixed with water in advance. 7. The fuel supply method for an engine according to claim 1, wherein the engine is for an automobile. 8. An apparatus for a fuel supply method for an engine according to claim 1.