JPH1037817A - System for heating fuel and air for prime mover, and fuel heater and air heater used in this system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for heating fuel and air for a prime mover, and a fuel heater and an air heater used in this system in which occurrence of black smoke at the prime mover can be prevented. SOLUTION: This system is provided with a fuel heater 10 arranged at a proper location in a fuel feeding and supplying passage 1 so as to heat fuel to be supplied to an engine with an engine cooling water being applied as a heat source; and an air heater 11 arranged at a proper location in an air feeding and supplying passage 3 so as to heat air to be supplied to the engine with the engine cooling water being applied as a heat source. Either one of or both of fuel and air is heated up to a predetermined temperature and supplied to the engine. The fuel heater 10 is provided with a tank main body, a fuel feeding chamber, a fuel discharging chamber and a communicating passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel and air heating system which exerts an excellent effect as an exhaust gas countermeasure for a prime mover such as an automobile engine, particularly a diesel engine, and a fuel heater and an air heater used in the system. is there.

[0002]

2. Description of the Related Art For example, in automobile engines, there are stricter exhaust gas regulations than in the past. Particularly in the case of gasoline engines, by improving the engine combustion system and utilizing catalysts, etc., exhaust gas measures that can meet environmental standards have been achieved.

[0003]

On the other hand, in a diesel engine using light oil as fuel, carbon monoxide and hydrocarbons are contained in engine exhaust gas. Due to the principle of a diesel engine, a large amount of black smoke or the like is generated in exhaust gas unlike a gasoline engine. However, there is no special exhaust gas regulation for the conventional diesel engine. This black smoke is particularly likely to be generated when the engine is started. However, because of the exhaust gas regulations for diesel engines, no method or means for effectively preventing the generation has been found.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a fuel and air heating system for a prime mover which can prevent generation of black smoke in a prime mover such as a diesel engine, and a fuel heater and an air heater used in the system. I do.

[0005]

A fuel and air heating system for a prime mover according to the present invention is disposed at an appropriate position in a fuel supply path, and heats fuel to be supplied to an engine using engine cooling water as a heat source. And an air heater disposed at an appropriate position in the air supply path and heating air to be supplied to the engine using the engine cooling water as a heat source, and heating both or one of the fuel and the air to a predetermined temperature. And supply it to the engine.

Further, the fuel heater of the present invention is connected to an appropriate position in the middle of a heater hose, circulates hot water supplied from the heater hose, and then returns the tank back to the heater hose. A fuel injection chamber installed at a lower part of the main body and supplied with a fuel that has passed through a fuel filter, and a fuel injection chamber installed at an upper part of the tank main body and delivering the fuel supplied from the fuel injection chamber to a fuel injection pump. A fuel discharge chamber; and a communication passage connecting the fuel injection chamber and the fuel discharge chamber in the tank body.

In the fuel heater according to the present invention, the communication path includes a plurality of pipe members arranged in the tank body, and fuel flowing in each pipe is added by engine cooling water in the tank body. It is characterized by being heated.

Further, the air heater according to the present invention is connected to an appropriate position in the middle of the heater hose and is disposed in the air cleaner, circulates the hot water supplied from the heater hose, and then returns to the heater hose again. Things.

The air heater according to the present invention is characterized in that the air heater is constituted by a coil-shaped pipe member disposed in the air cleaner.

[0010]

According to the present invention, in the fuel and air heating system, the fuel or air to be supplied to the engine is:
During the supply thereof, the fuel is heated to a predetermined temperature by a fuel heater or an air heater. By supplying the heated fuel and air to the engine as described above, the combustion efficiency is improved, and as a result, the generation of black smoke and the like in the exhaust gas can be significantly reduced.

The fuel heater and the air heater in the system of the present invention each use engine cooling water as a heat source, and can be realized with a relatively simple configuration. In addition, since it is only necessary to attach the fuel heater and the air heater to an existing engine, no cost is required, and this is extremely economically advantageous.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a fuel and air heating system for a motor according to the present invention and a fuel heater and an air heater used in the system will be described below with reference to FIGS.

FIG. 1 shows a schematic configuration example of a fuel and air heating system according to this embodiment. Fuel and air are supplied to the diesel engine 1 from a fuel supply path 2 and an air supply path 3, respectively. A fuel tank 4, a fuel filter 5, and a fuel injection pump 6 are sequentially arranged in the fuel supply path 2. Further, the air that has passed through the air cleaner 7 in the air supply path 3 is supplied. This fuel and air supply system may be substantially the same as the existing engine. Also, engine cooling water (hot water)
Is sent from a hot water temperature controller 8 to a room heater or the like via a heater hose 9.

The fuel and air heating system of this embodiment is also provided at a suitable position in the fuel supply path 2 and heats fuel to be supplied to the diesel engine 1 using engine cooling water as a heat source. An air heater 11 is provided at an appropriate position in the air supply path 3 and heats air to be supplied to the diesel engine 1 using engine cooling water as a heat source. The fuel heater 10 and the air heater 11 are connected to a hot water temperature controller 8 through a heater hose 9.
, And the supplied hot water is returned to the diesel engine 1 again.

Here, FIG. 2 and FIG.
2 shows a specific configuration example. 2 and 3, the fuel heater 10 is connected to an appropriate position in the middle of the heater hose 9 coming out of the hot water temperature regulator 8, circulates the hot water supplied from the heater hose 9, and then returns to the heater hose again. A tank main body 12, a fuel injection chamber 13 installed at a lower portion of the tank main body 12 and supplied with fuel that has passed through the fuel filter 5, and a fuel injection chamber 13 installed at an upper portion of the tank main body 12 and supplied from the fuel injection chamber 13. A fuel discharge chamber 14 for sending fuel to the fuel injection pump 6 and a communication path 15 connecting the fuel injection chamber 13 and the fuel discharge chamber 14 in the tank body 12 are provided. The fuel heater 10 is generally formed using a relatively thick iron material suitable for securing heat retention.

A perforated plate 16 is closed above and below the tank body 12 so that the inside of the tank body 12 is liquid-tight. The heater hose 9 is connected to a hose mounting pipe 17a, 1
7b is connected to the tank main body 12. In this example, the hot water is supplied from the lower pipe 17a and the hot water is discharged from the upper pipe 17b. The hose attachment pipes 17a and 17b are arranged at an appropriate angle from the center of the tank body 12, thereby the tank body 12
By making the hot water circulating in the inside swirl (see the dotted arrow in FIG. 3), the fuel can be uniformly heated.

The communication passage 15 is composed of a plurality of pipe members arranged inside the tank body 12. Each pipe member is connected to the holes 16a of the upper and lower perforated plates 16. Optimum dimensions and quantities of the pipe members are set according to the displacement of the diesel engine 1 and the like. For example, in the case of a displacement of 2000 to 3000 cc, about ten or more pipes are preferable. The fuel hose from the fuel filter 5 is connected to the fuel injection chamber 13 via the lower hose mounting pipe 18a. Fuel is delivered to the fuel injection pump 6 from a fuel hose connected to the fuel discharge chamber 14 via the upper hose mounting pipe 18b.

In the air cleaner 7, an air heater 11 is mounted inside an air element 19 as shown in FIG. FIG. 5 shows a configuration example of the air heater 11.
In this example, the air heater 11 is made of, for example, a coiled pipe member made of copper. End 11 of air heater 11
a and 11b are respectively connected to a heater hose 9 and supplied with hot water from a hot water temperature controller 8, whereby an air cleaner 7 is provided.
Heats the air passing through it.

During operation of the diesel engine 1, the air inside the air cleaner 19 is heated by the air heater 11 inside the air element 19, so that the air inside the air cleaner 7 is always kept at a constant temperature regardless of the time of summer, winter or the like. it can.
By heating the air from the intake port of the diesel engine 1 in advance, the air heated to a predetermined temperature is supplied into the intique manifold.

In the fuel and air heating system of the present invention, the fuel or air to be supplied to the diesel engine 1 is supplied by the fuel heater 10 or the air heater 11 in the fuel supply path 2 and the air supply path 3. It is heated to a predetermined temperature. The heating temperature is determined by the set temperature of the hot water temperature controller 8, and is usually 80 ° C. or slightly higher. When the fuel and air heated in this way are supplied to the diesel engine 1,
The combustion efficiency in the cylinder is improved, and the generation of black smoke and the like in the exhaust gas can be significantly reduced. Further, since the ignitability of the fuel is improved, the engine rotation is improved, and the horsepower can be increased.

Although the generation of black smoke and the like in the exhaust gas can be suppressed as described above, extremely good measurement results were obtained in the actual measurement of the components of the exhaust gas. Normally, in a diesel engine, the concentration of hydrocarbons and the like is considerably higher than that of a catholine engine, so that a component measurement tester for a catholine engine cannot be used. Since the exhaust gas when the fuel heater 10 or the air heater 11 of the present invention is used has an exhaust gas component similar to or close to that of a catholine engine, it can be sufficiently used even with a component measurement tester for a catholine engine. Incidentally, the carbon monoxide concentration in the exhaust gas was about 10%, and the hydrocarbon concentration was 0%. In this way, the concentration of carbon monoxide or hydrocarbons in the exhaust gas can be suppressed to a low level while being a light oil fuel,
It has excellent effects in environmental measures.

In the fuel and air heating system of the present invention, the above-described excellent effects can be obtained by using both the fuel heater 10 and the air heater 11 at the same time. Even when only one of them is operated, almost the same effect can be obtained.

[0023]

As described above, according to the present invention, the fuel heater and the air heater can be realized with a relatively simple configuration by using the cooling water of the existing engine as a heat source. Since the fuel heater and the air heater only need to be attached to the existing engine, the installation and the like do not require any labor, so that the cost is low and the economy is extremely advantageous. In addition, particularly in the case of a diesel engine, there is an advantage that exhaust gas measures which have not been realized conventionally can be effectively implemented.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration example of a fuel and air heating system according to an embodiment of the present invention.

FIG. 2 is a sectional view of a fuel heater in the system of the present invention.

FIG. 3 is an exploded perspective view of a fuel heater in the system of the present invention.

FIG. 4 is an exploded perspective view of a main part of an air cleaner in the system of the present invention.

FIG. 5 is a perspective view of an air heater in the system of the present invention.

[Explanation of symbols]

 Reference Signs List 1 diesel engine 2 fuel supply path 3 air supply path 4 fuel tank 5 fuel filter 6 fuel injection pump 7 air cleaner 8 hot water temperature controller 9 heater hose 10 fuel heater 11 air heater 12 tank body 13 fuel injection chamber 14 fuel discharge chamber 15 Communication passage 16 Perforated plate 17a, 17b Hose mounting pipe 18a, 18b Hose mounting pipe

Claims (5)

[Claims] 1. A fuel heater disposed at an appropriate position on a fuel supply path for heating fuel to be supplied to an engine using the engine cooling water as a heat source, and a fuel heater disposed at an appropriate position on an air supply path to supply the engine cooling water to a heat source An air heater for heating air to be supplied to the engine, and heating the fuel and / or the air to a predetermined temperature to supply the fuel to the engine. And air heating system. 2. The fuel heater according to claim 1, wherein the tank is connected to an appropriate portion of the heater hose, circulates hot water supplied from the heater hose, and then returns to the heater hose. A fuel injection chamber installed at a lower part of the tank body and supplied with a fuel that has passed through a fuel filter; and a fuel injection pump installed at an upper part of the tank body and supplied from the fuel injection chamber to a fuel injection pump. A fuel heater, comprising: a fuel discharge chamber configured to be delivered; and a communication passage connecting the fuel injection chamber and the fuel discharge chamber in the tank body. 3. The communication path includes a plurality of pipe members arranged in the tank main body, and fuel flowing through each pipe is heated by engine cooling water in the tank main body. The fuel heater according to claim 2, wherein: 4. The air heater according to claim 1, wherein the heater hose is connected to an appropriate position in the middle of a heater hose, is disposed in an air cleaner, circulates hot water supplied from the heater hose, and then returns to the heater hose. An air heater characterized in that the air heater is returned to. 5. The air heater according to claim 4, wherein the air heater is constituted by a coil-shaped pipe member disposed in the air cleaner.