KR19980048553A - Output Enhancer of Gas Fuel Internal Combustion Engine by Temperature Control of Intake Air - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention provides a specific weight (mass) of intake air when the intake air necessary for explosion stroke is cooled by using the vaporization heat (latent heat) generated when the liquefied gas fuel is used in an internal combustion engine using gas fuel. The larger the specific weight (mass), the greater the volumetric efficiency per unit volume, which reduces the amount of intake air injected per unit volume (ie, provides greater intake in the cylinder of the internal combustion engine cylinder). It is possible to increase the calorific value per volume. The output of the gaseous fuel internal combustion engine is thus increased.

2. Technical problem to be solved by the present invention

In an internal combustion engine using gaseous fuel, gaseous liquefied gas is operated by vaporizing it, so vaporization heat is generated in the process of vaporization. Cool.

The cooled intake air has a higher specific gravity (mass) and volumetric efficiency per unit volume, so that in the process of mixing gas fuel and intake air in a mixer of an internal combustion engine, the amount of intake air having a high specific gravity (mass) and volume efficiency can be reduced. It is a device that increases the output by increasing the amount of fuel and the amount of heat generated per unit volume.

3. Summary of Solution to Invention

In the fuel tank 1 of the internal combustion engine using gaseous fuel, the fuel (liquefied state) is evaporated in the intake air control room (5) via the fuel filter (2) and the gas liquid separation valve (3) that distinguishes between liquid and gaseous phases. (5-1) It vaporizes while passing through the tube, and cools the temperature in the room 5 while taking out the heat in the intake air control room 5. Then, it is transferred to the vaporizer 6.

On the other hand, when the suction air sucked through the air purifier (4) enters the cooled suction air control room (5), the intake air temperature is cooled according to the temperature conditions in the suction air control room (5) and the vaporizer in the mixer (7) It is mixed with gaseous fuel introduced through (6). At this time, the cooled intake air increases the volumetric efficiency per unit volume as the specific gravity (mass) increases, resulting in a small volume but large intake air.

This can reduce the amount of intake air in the process of mixing with the gaseous fuel in the mixer 7 and can increase the gaseous fuel instead, thereby increasing the calorific value per unit volume, thereby increasing the output.

4. Important uses of the present invention

According to the present invention, an internal combustion engine (eg, LPG vehicle) using gas fuel has better driving performance than a gasoline internal combustion engine (eg, gasoline vehicle) at low speed, but output is reduced by 5 to 10% at high speed. In order to eliminate this phenomenon, the cooling of the intake air increases the volume efficiency per unit volume (increases the mass of the intake air and reduces the volume), thereby increasing the output of fuel by increasing the amount of fuel input.

Therefore, it is to reduce the environmental pollution of soot through the substitution effect of diesel internal combustion engine and gasoline internal combustion engine (severe diesel and gasoline internal combustion engine pollution).

It also seeks to leave economic benefits from the use of lower cost gas fuel.

Description

Output Enhancer of Gas Fuel Internal Combustion Engine by Temperature Control of Intake Air

The present invention refers to a gas fuel (fuel produced by heat or catalytic cracking or reforming using natural gas and solid and liquid fuel as raw materials. It is liquefied in a gaseous state for storage location problems and convenience of transportation. (Fuel used to store liquid in the liquid state and vaporize it in gaseous state). It is related to the power intensifier of internal combustion engine. The heat of vaporization generated in the process of evaporating the fuel required for operation of gaseous internal combustion engine from liquid state to gas. By using (latent heat) and cooling the temperature of the intake air required for the internal combustion engine explosion stroke using the apparatus of the present invention, the specific weight (mass) of the intake air becomes large, and when the specific weight (mass) increases, the volumetric efficiency per unit volume is increased. The larger the volumetric efficiency, the lower the intake air input and increase the amount of gas fuel, thereby increasing the calorific value per unit volume. It is possible to enhance the output of the engine.

Currently, a car using LPG fuel, a type of gas fuel internal combustion engine, has a good driving performance at a low speed compared to a gasoline car, but output is reduced by 5 to 10% at high speeds.

For example, the calorific value (approximately 12, 000 Kcal / kg) per unit weight of LPG (liquid state) is greater than the gasoline calorific value (about 11, 200 Kcal / kg), but the calorific value per unit volume of gas mixed with air is 5 ~ 10% less. This is because liquid LPG vaporizes and is sucked into the engine cylinder in a perfect gas state, but volume efficiency per unit volume is inferior to that of a liquid (fine liquid-high mass) state such as gasoline. Less) Since the maximum output is lowered because the amount of heat generated per unit volume is small, output reduction occurs at high speeds.

In addition, the LPG internal combustion engine has a higher octane number (LPG-90,125 gasoline-87) than the gasoline internal combustion engine, and the volume efficiency in the engine cylinder due to gaseous fuel intake is lower than that of gasoline, resulting in less heat output per unit volume, resulting in lower output.

Current gas fuel internal combustion engines can increase the amount of fuel (gas) because the intake air, which is the atmospheric temperature at that time, is sucked into a certain volume of the engine cylinder according to the mixing ratio of the gas and the intake air, even if it intends to increase the output. none.

A) In order to solve the disadvantages of the gas fuel internal combustion engine as described above, the present invention uses the latent heat generated during the process of vaporizing the liquefied gas fuel required for engine operation using gas in an internal combustion engine using gas fuel. When evaporated through the evaporation coil in the intake air control room, which is a kind of the apparatus of the present invention, the temperature in the intake air control room is cooled and absorbed by the mixer through the carburetor of the engine.

On the other hand, the intake air required to operate the internal combustion engine is cooled while passing through the intake air control room cooled during the gaseous fuel evaporation process, and the cooled intake air has a higher specific gravity (mass) and a higher volumetric efficiency per unit volume. Is a small but high-mass intake air. Since the intake air has a high volumetric efficiency per unit volume in the process of mixing with the gaseous fuel in the engine mixer, the intake air amount can be reduced and the amount of gaseous fuel can be increased instead, thereby increasing the calorific value per unit volume.

Therefore, the output is enhanced.

B) Excessive cooling of the intake air is difficult to meet the optimal explosion condition of the internal combustion engine, so the cooling water temperature of the internal combustion engine is guided to the heating coil to control the cooling and heating of the excessive intake air. This control can be adjusted according to the opening and closing of the solenoid valve by the thermostat and the thermostat.

C) In this way, the cooling and heating of the intake air is properly adjusted to create the maximum output condition during the explosion stroke of the gas fuel internal combustion engine.

1 is an overall assembly view of an embodiment of the present invention

2 is a cross-sectional view of the present invention

* Description of the symbols for the main parts of the drawings *

1. Fuel Tank

2. Fuel Filter

3. GASFUEL SOLENOID VALVE

4. AIR CLEANER

4-1. Intake air hole

5. AIR CONDITION CONTROL CHAMBER

5-1. Evaporator Coil

5-2. HEATING COIL

5-3. THERMISTOR

5-4. CONTROLLER

5-5. Solenoid Valve

5-6. DRAIN VALVE

6. VAPORIZER

7. MIXER

8. ENGINE

9. Radiator

A. Suction air inlet

B. Liquid fuel inlet of gaseous fuel

C. Hot Water Outlet

D. Cooling suction air outlet

E. Gas Fuel Outlet

F. Hot water inlet

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

1 is an overall assembly diagram of an embodiment of the present invention assembled to a gas fuel internal combustion engine in use.

2 is a cross-sectional configuration diagram of only the present invention removed.

1) As a gaseous fuel internal combustion engine, fuel (liquefied state) passes through the fuel filter (2) in the fuel tank (1) to remove impurities, enters the gas and liquid separation (3), and selects the gas and liquid use categories. Particular gas in the fuel tank is generated when not driven. The vaporization heat (latent heat) is generated during the evaporation of the fuel in the liquid state to the gas state while passing through the evaporation coil 5-1. 5) It cools the inside, cools the air intake air temperature, becomes a gas fuel, and enters the fuel supercharger (6). If there is residual liquid fuel in the fuel supercharger 6, the gas is finally vaporized and the operating pressure is reduced and combined to enter the mixer 7 and mixed with the intake air.

On the other hand, if the intake air is passed through the air purifier (4) and in the intake air cooling control room (5) and cooled according to the intake air cooling control room (5) temperature conditions, the specific weight (mass) increases, so the volumetric efficiency per unit volume is increased. It becomes high suction air and enters the mixer (7). At this time, if the volume of the intake air decreases and the gas fuel input amount is increased instead of the constant volume mixer 7, the gas fuel input amount is increased into the cylinder of the engine (8) to increase the calorific value per unit volume. You can increase the output.

2) However, unconditional cooling of the intake air may not correspond to the explosion conditions of the gas fuel internal combustion engine, so that the heating coil together with the cooling evaporation coil (5-1) in the intake air cooling control room (5) in order to optimize the explosion conditions. (5-2) is installed. I will explain its operation.

The temperature regulator 5-3 detects the hot water of the engine 8 cooling water in the radiator 9 by the heating coil 5-2 according to the optimum set temperature fixed condition in the temperature controller 5-4. To the temperature controller 5-4, and the temperature controller 5-4 instructs the solenoid valve 5-5 to open and close the hot water flowing from the radiator 9, so that the intake air of the gas fuel internal combustion engine The optimum explosive conditions and within the conditions, the maximum amount of fuel (GAS) that is greater than the volume reduction due to intake air cooling is introduced into the cylinder of the engine 8, thereby increasing the volumetric efficiency per unit volume and thus increasing the heat output per unit volume. Is done.

3) The literature describing the relationship between the temperature of intake air and the specific weight of intake air is referred to by the Japanese author Yuya Sung Il's internal combustion engine engineering book, INTAKE AIR TEMPERATURE T ℃. If the temperature just before suction suction is t (absolute temperature T), the specific weight of suction is inversely proportional to T. The amount of air sucked into the cylinder is determined at the beginning of compression. The temperature Tb affects the amount of direct air (specific weight is proportional to Pb / Tb), but Tb may be seen to be proportional to T, so that Pmi changes with T and increases with T lower. It is defined as.

(See pages 73 and 74.)

* Pb: BOOST PRESSURE (mmHg abs)

* Pmi: City average effective pressure (kg / ㎠)

The gaseous fuel internal combustion engine uses the heat of vaporization generated during the process of evaporating fuel from a liquid into gas in liquid state. When the intake air temperature required for internal combustion engine explosion stroke is cooled using the apparatus of the present invention, the specific weight of the intake air ( Mass) increases and volume efficiency increases, reducing the input of intake air and increasing the gas volume instead, thereby increasing the calorific value per unit volume, thereby increasing the output of the gas fuel internal combustion engine.

As the output increases, the spread of gas fuel internal combustion engines is expanded. 1) Since there are less harmful gases than gasoline internal combustion engines and diesel internal combustion engines, it prevents environmental pollution and contributes to pleasant environment improvement.

2) Since gas fuel is cheaper than gasoline fuel, it contributes to the social economy by expanding supply.

Claims (4)

Gas fuel (refers to fuel produced by heat or catalytic cracking or reforming from natural gas and solid and liquid fuels, or liquefied in gaseous state for storage location problems and convenience of transportation. As an internal combustion engine using liquefied fuel, which is a gaseous fuel, the evaporative coil (5-1) generates vaporization heat (latent heat) to cool the intake air. A device for cooling the intake air passing through the control room (5) to make the intake air specific weight (mass) to be large, becoming a gas fuel, and entering the mixer (7) via the fuel supercharger (6). On the other hand, the hot water in the radiator 9, which is a cooling water cooling device of the engine 8, is made to respond to the fixed temperature condition of the temperature regulator 5-4 in order to make the intake air at the optimal explosive condition of the internal combustion engine. 3) In response, the solenoid valve 5-5 passes (or stops) and the heating coil 5-2 installed in the intake air cooling control chamber 5 is heated (or stopped). A device that adjusts the intake air temperature passing through) to cold temperature. At this time, in order to use the heat efficiency of the suction air cooling control room (5) case and the mixer (7) case and the connection heat dissipation device, such as the intake air passage. Combined with Paragraphs 1, 2, and 3, the intake air maintains the minimum low temperature for the maximum explosion conditions to create the maximum volumetric efficiency per unit volume in the mixer (7) so that the gas fuel can be injected to the maximum. This is all of the devices that increase the power by causing the mixer in the engine (8) cylinder to produce the maximum heat output per unit volume.