KR101202008B1 - Regulator Having Thermo Element and Supply Apparatus of Gas Fuel Using The Same and Vehicle Having The Same - Google Patents

Abstract

PURPOSE: A regulator with a thermo element, a gas fuel supply device with the same and a vehicle with the same are provided to accurately control the concentration of harmful exhaust gas and engine output by adjusting the mount of gas fuel. CONSTITUTION: A gas fuel supply device comprises a supply unit(200) and a regulator(300). The supply unit is connected to a fuel storage tank(100) holding high pressure gas fuel, and supplies the gas fuel to the outside. The supply valve(210) of the supply unit selectively controls the gas fuel in a path. The regulator is connected to the supply unit, and comprises a moving space, a temperature regulating unit(330), and a pressure regulating unit. The gas fuel moves along the moving space. The temperature of a thermo element is changed according to the flow of current. The temperature regulating unit controls the temperature by heat exchanging with the gas fuel. The pressure regulating unit controls the pressure of the gas fuel brought in the moving space.

Description

Regulator having thermoelectric element and gas fuel supply device using same, and vehicle including same {Regulator Having Thermo Element and Supply Apparatus of Gas Fuel Using The Same and Vehicle Having The Same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas fuel supply device for supplying gas fuel to an engine. The present invention relates to a thermoelectric element capable of precise control of a gas fuel supplied to an engine by providing a regulator for adjusting a pressure and a temperature of a gas fuel supplied from a fuel tank. It is provided with a regulator and a gas fuel supply device using the same.

As the price volatility of existing fossil fuels intensifies around the world and raises the issue of environmental pollution, a device that operates engines using natural gas or LPG fuel, which has abundant reserves and emits less carbon dioxide than existing transportation fuels. It is developed a lot about.

Various devices have been developed for a device for operating an engine using such a gas fuel, and in particular, many vehicles using LNG and CNG as fuel have been developed.

In automobiles using CNG as a fuel, a gas fuel is compressed at high pressure, and a regulator for controlling pressure and temperature is essential when compressed gas fuel is supplied from the fuel tank to the engine.

In compressed gas vehicles, the regulator converts the pressure of about 200 bar to the appropriate pressure through the multistage pressure drop mechanism.

Since CNG is compressed at high pressure, the engine may be damaged by the pressure when it is supplied to the engine as it is. Therefore, by providing a separate regulator to control the pressure of the gas fuel supplied to the engine to increase the stability of the engine.

Looking at the conventional regulator, in general, a device that controls the pressure through the volume control of the gas fuel by the gas fuel supplied therein has been used a lot, and recently, not only the pressure control of the gas fuel but also the temperature of the gas fuel inside the regulator together It is configured to.

In order to control the temperature of the gas fuel in the regulator, a separate flow path was formed inside the radiator and passed through a heat transfer fluid to control the temperature of the gas fuel through heat exchange. Here, the heat transfer fluid may be a fluid or cooling water passing through the radiator.

Through this method, the conventional regulator not only changes the flow rate by adjusting the pressure of the gas fuel, but also adjusts the gas fuel temperature to suit the requirements of the engine.

However, the conventional method has a problem that the heat transfer fluid is not fast enough temperature change to control the temperature of the gas fuel inside the regulator.

In addition, there is a problem that the heat transfer fluid for cooling and heating the gas fuel in the regulator must be provided separately.

An object of the present invention is to solve the problems of the conventional gas fuel supply device, by adjusting the pressure and temperature of the gas fuel supplied from the fuel tank by providing a thermoelectric element inside the regulator for supplying the engine temperature of the gas fuel By regulating rapidly in a wider range, it provides a regulator equipped with a thermoelectric element that facilitates temperature control of a gas fuel that can increase the performance and energy efficiency of the engine and finely control the harmful exhaust gas concentration, and a gas fuel supply device using the same. Is in.

In order to solve the above problems, the gas fuel supply apparatus according to an aspect of the present invention is connected to a fuel tank containing a high-pressure gas fuel to supply the gas fuel to the outside, the supply of the gas fuel on the movement path is selective The gas is provided with a supply unit having a supply valve to be adjusted to the supply unit and a thermoelectric element connected to the supply unit, a moving space in which the gas fuel moves, a thermoelectric element disposed in the moving space and changing in temperature with the flow of current. And a regulator including a temperature controller for controlling a temperature through heat exchange with fuel, and a pressure controller for controlling a pressure of the gas fuel introduced into the moving space, wherein the thermoelectric element includes the gas fuel in the moving space. Temperature is disposed adjacent to the gas inlet to which the gas is supplied to control the temperature of the gas fuel Is disposed adjacent to the gas discharge port is changed in which the gaseous fuel is discharged by the section means and said pressure control unit and a second temperature adjusting means for adjusting the temperature of the gas fuel.

In addition, the temperature control unit may be formed to surround a portion of the movement path of the gas fuel in the moving space.

In addition, the temperature control unit may further include a first temperature measuring sensor for measuring the temperature of the gas fuel in the moving space.

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In addition, the first temperature measuring sensor may be disposed between the first temperature adjusting means and the second temperature adjusting means on the gas fuel movement path of the moving space.

In addition, the regulator may further include a second temperature measuring sensor for measuring the temperature of the gas fuel is provided in the gas discharge port discharged from the gas discharge.

The apparatus may further include a delivery unit including an engine inlet pipe connected to the regulator for delivering the gas fuel whose pressure is changed to a separate engine, and an injector for injecting the gas fuel into the engine from one side of the engine inlet pipe. It may include.

Here, the engine inlet pipe may further include an auxiliary temperature measuring sensor for measuring the temperature of the gas fuel supplied to the injector to the end adjacent to the injector.

In addition, the engine inlet pipe may further include an auxiliary temperature control means for selectively adjusting the temperature of the gas fuel supplied to the injector to the end adjacent to the injector.

The supply unit may further include a sonic nozzle connected to the regulator to be disposed adjacent to the regulator on a path through which the gas fuel moves, and to allow the gas fuel supplied to the regulator to have a uniform speed and pressure. Can be.

In addition, the regulator may further include a gas filter disposed on the path for supplying the gas fuel to the engine to remove impurities contained in the gas fuel.

According to another aspect of the present invention in order to solve the above problems, is connected to a fuel tank equipped with a gas fuel is supplied to the gas fuel and the moving space in which the gas fuel supplied therein is disposed in the moving space It includes a thermoelectric element that changes in temperature as the current flows, and includes a temperature controller for controlling a temperature through heat exchange with the gas fuel, and a pressure controller for controlling the pressure of the gas fuel introduced into the moving space.

According to the present invention to solve the above problems has the following effects.

In order to supply gas fuel from the fuel tank to the engine, a separate regulator is provided to supply gas fuel at a pressure appropriate to the engine's requirements, and a separate thermoelectric element is provided inside the regulator to suit the environment and engine requirements. The effect of controlling the temperature of the gas fuel, which is caused by the fuel supply generated when using the gas fuel in extreme or high temperature areas (evaporation and cold start in the extreme areas, and output due to density drop in the high temperature areas) Degradation problems, both areas can reduce energy efficiency due to changes in engine performance due to changes in fuel supply conditions and increase of harmful substances in exhaust gas.

In addition, by controlling the temperature as well as the instantaneous pressure of the gas fuel supplied to the engine, it is possible to finely control the amount of the gas fuel supplied to the engine to enable precise control of the engine output and harmful exhaust gas concentration.

In addition, since the regulator includes a thermoelectric element for controlling the temperature of the gas fuel, the response speed of temperature regulation by external conditions is fast, and thus active control is possible.

1 is a view showing a schematic configuration of a gas fuel supply apparatus according to an embodiment of the present invention;
FIG. 2 is a view schematically showing the configuration of a regulator used in the gas fuel supply device of FIG. 1; FIG.
3 is a view illustrating a state in which a separate sonic nozzle is provided in a regulator in the gas fuel supply device of FIG. 1; And
FIG. 4 is a flowchart illustrating a process of adjusting a pressure and a temperature of a gas fuel supplied into the regulator of FIG. 1.

A preferred embodiment of a regulator equipped with a thermoelectric device according to the present invention configured as described above and a gas fuel supply device using the same will be described with reference to the accompanying drawings. However, this is not intended to limit the present invention to a specific form, but to help a more clear understanding through the present embodiment.

In addition, in describing the present embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

The gas fuel supply apparatus according to the present invention basically adjusts the pressure and flow rate of the gas fuel according to the injection conditions of the fuel required by the engine when supplying the gas fuel to the engine.

First, referring to FIGS. 1 and 2, a configuration of a regulator equipped with a thermoelectric device according to an exemplary embodiment of the present invention and a gas fuel supply device using the same will be described below.

1 is a view showing a schematic configuration of a gas fuel supply device according to an embodiment of the present invention and FIG. 2 is a view schematically showing the configuration of a regulator used in the gas fuel supply device of FIG.

In describing the present embodiment, not only a regulator equipped with a thermoelectric element, but also a gas fuel supply apparatus using the same will be described together.

Gas fuel supply apparatus according to an embodiment of the present invention comprises a large supply unit 200, the regulator 300 and the delivery unit 400. In addition, in order to clearly understand the present embodiment in addition to the gas fuel supply device will be described further including an electronic control unit (ECU) for controlling the temperature and pressure of the engine (E) and the entire system separately. .

The supply unit 200 is provided on the supply pipe 220 and the supply pipe 220 for supplying the high-pressure gas fuel (G) contained in the fuel tank 100 provided separately to the regulator 300 ON / A supply valve 210 which injects the gaseous fuel G supplied from the fuel tank 100 to the regulator 300 to the regulator 300 according to a requirement of the engine E by repeating OFF. It is configured to include.

In this case, the supply valve 210 is generally supplied by selectively controlling the supply of fluid and gas to a specific target position, thereby supplying to meet the conditions required at the target position. The operation degree of the supply valve 210 is controlled by the central processing unit (ECU).

The regulator 300 generally adjusts the pressure and temperature of the gas fuel G so as to meet the conditions required by the engine E before supplying the gas fuel G of the high pressure to the engine E. do.

One side of the regulator 300 is connected to the supply pipe 220 and adjusts the pressure to an appropriate level to supply the gas fuel (G) supplied by the operation of the supply valve 210 to the engine (E). To the engine (E). The detailed configuration of the regulator 300 will be described later.

On the other hand, the regulator 300 is provided with a separate temperature control unit 330 for adjusting the temperature of the gas fuel (G) supplied from the supply unit 200 therein. The temperature controller 330 may be configured to determine the temperature of the gas fuel G whose pressure is adjusted in a path in which the gas fuel G supplied from the supply unit 200 moves in the regulator 300. Adjust it to be supplied to (E).

The delivery unit 400 is connected to the regulator 300 to transfer the gas fuel (G) of the pressure is changed to the engine (E), it is largely composed of the engine inlet pipe 410 and the injector 420.

The engine inlet pipe 410 is connected to the regulator 300 to deliver the gas fuel (G) depressurized by the regulator 300 to the engine (E).

The injector 420 is provided at one side of the engine inlet pipe 410 and may be formed in various forms as a device for directly injecting the gas fuel (G) supplied from the regulator 300 to the engine (E). In the present embodiment, the gas fuel (G) is injected directly into the combustion chamber provided in the engine (E).

That is, the regulator 300 does not directly supply the gas fuel G to the engine E when the gas fuel G is supplied to the engine E, but the gas fuel to the engine E through the injector 420. Supply (G).

On the other hand, the regulator 300 is disposed on a path for supplying the gas fuel (G) to the engine (E) to separate the gas filter 500 to remove impurities contained in the gas fuel (G) It may be configured to include more. In this embodiment, as shown in FIG. 1, the gas filter 500 is provided on a movement path for supplying the gas fuel G from the regulator 300 to the injector 420. 500 removes impurities and the like contained in the gaseous fuel (G).

As described above, the schematic configuration of the gas fuel supply apparatus according to the present invention has been described, and the configuration of the regulator 300 and the temperature controller 330 will be described with reference to FIG. 2.

The regulator 300 is largely configured to include a moving space 310, the temperature control unit 330 and the pressure control unit 320.

In addition, the regulator 300 includes a gas inlet 340 through which the gas fuel G is introduced into the moving space 310 and the gas fuel via the moving space 310 by the supply valve 210. G) is configured to further include a gas outlet 350 is discharged.

The moving space 310 is a space formed inside the regulator 300 and is a space in which the gas fuel G supplied from the gas inlet 340 is discharged due to a change in pressure and temperature therein.

The temperature control unit 330 includes a thermoelectric element 332 and the first temperature measuring sensor 334, the thermoelectric element 332 is the gas fuel (G) in the moving space (310) The temperature of the gas fuel (G) is controlled through heat exchange with the gas fuel (G) on the path through which the gas moves. Here, the thermoelectric element 332 may be formed to surround a portion of the movement path of the gas fuel (G) in the moving space (310). Since the thermoelectric element 332 is configured to cover a part of the movement path of the gas fuel G, the contact area of the gas fuel G in contact with the thermoelectric element 332 is increased.

The thermoelectric element 332 may be a Peltier element, and the temperature of the thermoelectric element 332 may be selectively changed by contact with the gaseous fuel G due to the endotherm and the heat generation as the current flows. If the temperature of the gas fuel (G) is higher than the temperature required by the engine (E), by cooling the temperature of the region in which the thermoelectric element 332 and the gas fuel (G) contact the gas fuel (G) ) Can be cooled. In addition, when the temperature of the gaseous fuel (G) is low, it is possible to increase the temperature of the gaseous fuel (G) by flowing a current in the opposite manner.

In general, when a thermoelectric element connects two kinds of metal tips to flow a current, one terminal absorbs heat and the other terminal generates heat depending on the current direction. If semiconductors such as bismuth and tellurium having different electric conduction methods are used instead of the two kinds of metals, a Peltier device capable of efficient endothermic and exothermic action can be obtained. It is possible to switch between the endotherm and the heat generation in accordance with the current direction, the endothermic, heat generation amount can be adjusted according to the amount of current.

On the other hand, the thermoelectric element 332 may be composed of a plurality, in this embodiment the thermoelectric element 332 is composed of a pair of the first temperature regulating means 332a and the second temperature regulating means 332b.

The first temperature control means 332a is disposed adjacent to the gas inlet in the moving space to control the temperature through heat exchange with the gas fuel G introduced through the gas inlet.

The second temperature control means 332b is differently disposed in the moving space adjacent to the gas outlet so that the gas fuel G whose pressure is changed is discharged to the delivery unit 400. Adjust the temperature of G).

That is, the gas fuel (G) in the regulator 300 is a macroscopic temperature is controlled by the first temperature control means (332a), after which the temperature of the gas fuel (G) the pressure is adjusted is the second It is adjusted once again by the temperature control means 332b.

As described above, the thermoelectric element 332 is controlled by the first temperature regulating means 332a and the second temperature regulating means 332b, so that the temperature may change due to the pressure change of the gas fuel G. The temperature of the gas fuel (G) can be adjusted to the temperature required by the engine (E).

The first temperature measuring sensor 334 is provided in the moving space 310 and is configured to detect the temperature cotton according to the pressure change of the gas fuel (G). Thus, the first temperature measuring sensor 334 transfers the temperature information of the gas fuel G to the central processing unit ECU.

The central processing unit ECU is connected to the thermoelectric element 332 and the gas required by the engine E according to the temperature of the gaseous fuel G measured by the first temperature measuring sensor 334. The operation of the thermoelectric element 332 is adjusted according to the temperature condition of the fuel G.

In the present embodiment, the first temperature measuring sensor 334 is disposed between the first temperature adjusting means 332a and the second temperature adjusting means 332b on the gas fuel G moving path of the moving space. .

Thus, after measuring the temperature of the gas fuel (G) whose temperature is controlled by the first temperature control means (332a), the temperature required by the engine (E) in accordance with the measured temperature of the gas fuel (G) The central processing unit controls the operation of the second temperature adjusting means 332b to meet the conditions.

That is, after measuring the changed temperature of the gas fuel (G) by the first temperature control means (332a) or the pressure control unit in the first temperature measuring sensor 334, the second according to the measured result Temperature control means 332b is operated to control the temperature of the gas fuel (G).

In this way, the temperature controller 330 is introduced into the moving space 310 to measure the temperature of the gas fuel (G) whose pressure is controlled by the pressure controller 320 to the engine (E) The temperature of the gaseous fuel G is adjusted to be appropriately supplied.

Separately, the temperature controller further includes a second temperature measuring sensor 336 which measures the temperature of the gas fuel G, which is provided at the gas discharge port through which the gas fuel G is discharged from the regulator 300 and discharged. It can be configured to include.

As shown, the second temperature measuring sensor 336 of the gas fuel (G) discharged to the delivery unit 400 after the temperature of the gas fuel (G) in the regulator 300 is changed Measure the temperature. That is, by measuring the temperature of the gas fuel (G) discharged from the regulator 300 to determine whether or not meet the temperature conditions required by the engine (E).

The central processing unit controls the operation of the thermoelectric element 332 according to the temperature of the gas fuel G measured by the second temperature measuring sensor 336.

As such, the temperature adjusting part includes the first temperature measuring sensor 334 and the second temperature measuring sensor 336 so that the temperature of the gas fuel G can be more accurately controlled and supplied to the engine E. do.

The pressure control unit 320 controls the pressure of the gas fuel (G) introduced into the moving space (310).

The pressure control unit 320 is provided in the regulator 300, the diaphragm 322 is expanded and contracted in accordance with the inflow and discharge of the gas fuel (G) introduced, the balance spring for pressing the diaphragm 322 324, and a pressure adjusting screw 326 for adjusting the degree of pressure in accordance with the operation of the diaphragm 322.

The diaphragm 322 is configured such that one side is disposed inside the moving space 310 and is moved up and down and is provided with a restoring force by the balance spring 324. And the pressure adjusting screw 326 is configured to adjust the degree of restoring force provided to the diaphragm 322 is used when the regulator 300 adjusts the degree in adjusting the pressure of the gas fuel (G). .

The gas inlet 340 is formed at one side of the regulator 300 and accommodates the gaseous fuel G supplied through the supply unit 200 therein. Here, the gas inlet 340 is configured to include a lever 342 and the main spring 344, the lever 342 is hinged in the regulator 300 around the middle portion and one side through the lifting The gas inlet 340 is selectively opened and closed. The main spring 344 is disposed below the other side of the lever 342 to provide a restoring force to the lever 342.

In addition, the gas discharge port 350 discharges the gas fuel G whose pressure is controlled by the operation of the pressure regulating unit 320.

Looking at the operation of the regulator 300 having such a configuration, when the gas fuel (G) is introduced into the interior by the supply unit 200, the diaphragm 322 in accordance with the increase in the internal pressure of the regulator 300 Pushed up. At this time, the balance spring installed on the upper surface of the diaphragm 322 is contracted and the main spring 344 provided on the lower portion of the lever 342 is expanded. Accordingly, the lever 342 closes the gas inlet 340 to block the gas fuel G introduced therethrough.

As such, the gas fuel (G) decompressed by the additional blocking of the gas fuel (G) is discharged through the gas outlet (350) and at the same time the pressure inside the regulator (300) is lowered as the balance spring ( The diaphragm 322 is lowered by the elasticity of 324 and rotates the lever 342 by pushing the lever 342 of the bottom portion downward. Accordingly, the gas inlet 340 is in an open state.

Through such a process, the regulator 300 reduces the gas fuel G to the pressure required by the engine E through the opening and closing of the gas inlet 340. Here, the pressure inside the regulator 300 may be adjusted by adjusting the pressure adjusting screw 326.

On the other hand, when adjusting the pressure of the gas fuel (G) in the regulator 300, the pressure of the gas fuel (G) as the temperature of the gas fuel (G) is changed by the temperature control unit 330 Fine adjustment is possible.

In general, when the pressure, volume, and temperature are P, V, and T, respectively, the ideal gas state equation is represented by PV = nRT. That is, in the closed state, the pressure also increases or decreases as the temperature increases or decreases.

By the same principle as the temperature of the gas fuel (G) in the regulator 300 is adjusted as well as the macroscopic pressure by the pressure control unit 320 as well as the microscopic pressure by the temperature control unit 330 You can also adjust.

On the other hand, separately from the engine inlet pipe 410 is an auxiliary temperature measuring sensor for measuring the temperature of the gas fuel (G) supplied to the engine (E) by the injector 420 as shown in FIG. It may be further provided.

The auxiliary temperature measuring sensor measures the temperature of the gas fuel (G) moving in the position adjacent to the injector 420 on the engine inlet pipe 410 and transmits to the central processing unit.

The central processing unit adjusts the temperature of the gas fuel G discharged from the regulator 300 in consideration of the temperature changed while the gas fuel G moves the engine inlet pipe 410.

In addition, the engine inlet pipe 410 may further include a separate auxiliary temperature control means as well as the auxiliary temperature measuring sensor. By providing the auxiliary temperature control means not only to control the temperature of the gas fuel (G) in the regulator 300, the gas fuel (G) just before the gas fuel (G) is injected into the engine (E) By adjusting the temperature of the gas fuel (G) can be precisely adjusted to suit the temperature conditions required by the engine (E).

As such, the auxiliary temperature measuring sensor and the auxiliary temperature adjusting means are further provided at a position adjacent to the injector 420 on the engine inlet pipe 410, thereby discharging the gas fuel G discharged from the regulator 300. Even if the temperature changes while moving along the engine inlet pipe 410, the temperature can be adjusted to meet the requirements of the engine (E).

Next, referring to FIG. 3, a form in which a separate sonic nozzle 230 is provided at a point where the supply unit 200 and the regulator 300 are connected is as follows.

3 is a view illustrating a state in which a separate sonic nozzle 230 is provided in the regulator 300 in the gas fuel supply device of FIG. 1.

The supply unit 200 is provided on one side of the supply pipe 220 is further provided with a separate sonic nozzle 230 to supply the gas fuel (G) supplied to the regulator 300 with a uniform pressure. do.

The sonic nozzle 230 is provided on one side of the supply pipe 220 and disposed adjacent to the regulator 300 to change the flow rate and pressure of the gas fuel G supplied by the supply valve 210. Provided to the regulator 300.

The sonic nozzle 230 is formed with a flow path through which gas flows, and the cross-sectional area of the flow path is formed to be smaller as at least a portion thereof is closer to the regulator 300.

Thus, when the gas fuel G is supplied to the regulator 300, when the sonic nozzle 230 passes through the sonic nozzle 230, the cross-sectional area of the flow path becomes smaller, and thus, the gas fuel G may become a bottleneck. Flow velocity and pressure increase. At this time, the flow rate of the gas fuel (G) is increased by the sonic nozzle 230 by choking but it does not increase any more than a certain level.

When the gaseous fuel (G) is supplied to the regulator 300 as described above, the flow rate and pressure of the gaseous fuel (G) are increased by passing through the sonic nozzle (230), but are supplied to the regulator (300). The flow rate and pressure of the gas fuel G are made uniform.

The regulator 300 supplied with the gas fuel G having a uniform pressure and speed by the sonic nozzle 230 adjusts the pressure and temperature to meet the requirements of the engine E so that the engine E ) Is supplied to the gaseous fuel (G).

In this way, the sonic nozzle 230 is formed in the coupling region of the supply pipe 220 and the regulator 300 so that the gas fuel G passing through the sonic nozzle 230 has a diameter of the sonic nozzle 230. As this becomes smaller, the flow rate and pressure increase according to Bernoulli's principle.

In this embodiment, the flow rate of the gas fuel (G) discharged to the regulator 300 via the sonic nozzle 230 is configured to be the sound speed. As the flow rate of the gas fuel G discharged to the regulator 300 reaches the sound speed, the flow rate of the gas fuel G no longer increases.

When the flow rate of the gaseous fuel G discharged from the sonic nozzle 230 does not increase any more and reaches a termination speed, the flow rate of the gaseous fuel G supplied to the regulator 300 becomes uniform. In the regulator 300, the pressure of the gas fuel G supplied to the engine E may be uniformly controlled.

In addition, as the flow rate and pressure of the gas fuel G supplied to the regulator 300 become uniform, the pressure control of the gas fuel G by the pressure regulating unit 320 may be precise. Temperature control by the temperature control unit 330 can also be easier.

In general, the sonic nozzle is also referred to as a critical flow venturi nozzle, and as shown in FIG. 3, a flow path having a constant diameter is formed at a side into which the gas fuel is introduced, and the flow path diameter (section area) is rapidly increased. This smaller section exists, and is subsequently formed in a shape in which the flow path diameter increases constantly until discharge (see ISO 9300 standard).

As the cross-sectional area decreases, the flow rate must be increased to maintain a constant mass flow rate. The energy required to increase this flow rate is derived from the random kinetic energy reflected in the temperature (the temperature is lowered in proportion to the change in the square of the flow rate, which is called the Bernoulli effect). Thus, as the gaseous fuel G flows through the sonic nozzle 230, the flow rate increases until it reaches a minimum at the maximum cross-sectional area. Here, the flow rate of the gas fuel increases as the diameter of the flow path decreases, but the flow rate does not increase any more than a certain level. This is called the termination velocity, and in the embodiment of the present invention, the velocity of the gas fuel at the sound velocity no longer increases.

This phenomenon is called a choking phenomenon, which occurs when there is a pressure difference in the gas body. However, increasing the pressure ratio increases the flow velocity at the minimum cross section of the flow path, but does not increase any more when the speed reaches the speed of sound.

Thus, when the gas fuel G is supplied to the regulator 300 via the sonic nozzle 230, the flow rate and pressure of the gas fuel G supplied to the regulator 300 are increased but uniform. As a result, the load on the regulator 300 is relatively low.

When using the general supply valve 210 without using the sonic nozzle 230, the supply valve 210 injects fuel at a few tens Hz (about 60 Hz maximum) and accordingly the regulator 300 The pressure at the rear end changes significantly. As such, when the pressure at the rear end of the regulator 300 is intermittently changed, since the pressure to be adjusted in the regulator 300 is constantly changed, a large load is applied to the regulator 300. When the back pressure of the regulator 300 is repeatedly changed, it is difficult to constantly control the pressure in the regulator 300, thereby affecting the control of the entire system.

By using the sonic nozzle 230 as described above, the flow rate of the gas fuel G supplied to the regulator 300 can be constantly adjusted. Accordingly, the regulator 300 also uses the gas fuel at a uniform pressure. G) is supplied to the engine E.

Next, referring to FIG. 4, a process in which the gas fuel G supplied into the regulator 300 is controlled by the pressure controller 320 and the temperature controller 330 is as follows.

FIG. 4 is a flowchart illustrating a process of adjusting the pressure and temperature of the gas fuel G supplied into the regulator 300 of FIG. 1.

First, the gas fuel (G) is supplied to the inside of the regulator 300 by the supply unit 200 from the fuel tank 100 (S01). When the gas fuel G is supplied to the moving space 310 inside the regulator 300, the pressure of the gas fuel G is adjusted by the pressure adjusting unit 320 (S02). . In this case, when the sonic nozzle 230 is provided in the supply unit 200, the pressure of the gas fuel G supplied to the regulator 300 is uniform, so that the regulator 300 is more precisely provided. The pressure of the gas fuel (G) can be adjusted.

And the temperature of the gas fuel (G) by measuring the temperature of the gas fuel (G) by the first temperature measuring sensor 334 provided on the path of the gas fuel (G) to determine whether it is suitable to be supplied to the engine (E) Go through the step (S03). In this case, the first temperature measuring sensor 334 transfers the temperature information of the gas fuel G measured by the central processing unit ECU to determine the operation of the thermoelectric element 332 by the central processing unit ECU. do.

When the temperature of the gas fuel (G) whose pressure is controlled is suitable to be supplied to the engine (E), the gas fuel (G) is discharged to the injector (420) (S04).

However, when the temperature of the gas fuel (G) whose pressure is controlled is not suitable to be supplied to the engine (E), the central processing unit (ECU) operates the thermoelectric element 332 to the gas fuel (G). After adjusting the temperature of the gas to a suitable temperature to be supplied to the engine (E) and supplies the gas fuel (G) to the injector (420) (S05).

Thereafter, the injector 420 supplies the gas fuel G to the engine E (S06). Through such a process, the gas fuel supply device may adjust the gas fuel G to suit the pressure and temperature conditions required by the engine E by the regulator 300.

As described above, a preferred embodiment of the present invention has been described, and in addition to the above-described embodiments, it may be embodied in other forms without departing from the spirit or scope of the present invention. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the invention is not to be limited to the foregoing description, and may be modified within the scope of the appended claims and their equivalents.

100: fuel tank 200: supply unit
210: supply valve 220: supply pipe
230: Sonic Nozzle 300: Regulator
310: moving space 320: pressure control unit
330: temperature control unit 340: gas inlet
350: gas outlet 400: delivery unit
410: engine inlet pipe 420: injector
500: gas filter S: injector
ECU: central processing unit E: engine

Claims (13)

A supply valve 210 connected to the fuel tank 100 containing the high-pressure gas fuel G to supply the gas fuel G to the outside, and selectively controlling the supply of the gas fuel G on a movement path. Supply unit having a; And
The thermoelectric element 332 is connected to the supply unit 200 and is disposed in the moving space 310 in which the gaseous fuel G moves, and is disposed in the moving space 310 and whose temperature changes as a current flows. A regulator including a temperature control unit 330 for controlling the temperature through heat exchange with the gas fuel (G) and a pressure control unit 320 for adjusting the pressure of the gas fuel introduced into the moving space ( 300); Including;
The thermoelectric element 332 is disposed adjacent to the gas inlet 340 to which the gas fuel G is supplied in the moving space 310 to adjust the temperature of the gas fuel G. A second temperature control is disposed adjacent to the gas discharge port 350 through which the gas fuel G whose pressure is changed by the pressure adjusting unit 320 is discharged, and controls the temperature of the gas fuel G. Gas fuel supply comprising a means (332b). The method of claim 1,
The temperature control unit 330,
Gas fuel supply device formed to surround a portion of the movement path of the gas fuel (G) in the moving space (310). delete The method of claim 1,
The temperature control unit 330,
Gas fuel supply device further comprises a first temperature measuring sensor (334) for measuring the temperature of the gas fuel (G) in the moving space (310). The method of claim 4, wherein
The first temperature measuring sensor 334,
Gas fuel supply device disposed between the first temperature control means (332a) and the second temperature control means (332b) on the gas fuel (G) movement path of the moving space (310). The method of claim 4, wherein
The gas further includes a second temperature measuring sensor 336 which measures the temperature of the gas fuel (G) discharged provided in the gas outlet 350 through which the gas fuel (G) is discharged from the regulator 300 Fuel supply. The method of claim 1,
The engine (E) at one side of the engine inlet pipe (410) and the engine inlet pipe (410) to be connected to the regulator 300 to deliver the gas fuel (G), the pressure is changed separately provided to the engine (E) Gas fuel supply device further comprising a delivery unit (400) comprising an injector (420) for injecting the gas fuel therein. 8. The method of claim 7,
The engine inlet pipe 410,
And an auxiliary temperature measuring sensor for measuring a temperature of the gas fuel (G) supplied to the injector (420) at an end portion adjacent to the injector (420). The method of claim 8,
The engine inlet pipe 410,
Gas fuel supply device further comprises an auxiliary temperature control means for selectively adjusting the temperature of the gas fuel (G) supplied to the injector (420) at the end adjacent to the injector (420). The method of claim 1,
The supply unit 200,
Connected to the regulator 300 is disposed adjacent to the regulator 300 on the path that the gas fuel (G) is moved, the gas fuel (G) supplied to the regulator 300 has a uniform speed and pressure Gas fuel supply device further comprises a sonic nozzle (230) to have. The method of claim 1,
The regulator 300 further includes a gas filter 500 disposed on a path for supplying the gas fuel G to the engine E, and further including a gas filter 500 for removing impurities contained in the gas fuel G. Device. 12. A vehicle comprising the gas fuel supply apparatus of any one of claims 1, 2 and 4. A moving space 310 connected to the fuel tank 100 equipped with gas fuel G to receive the gas fuel G and to which the gas fuel G supplied therein moves;
A temperature control unit 330 disposed in the moving space 310 and having a thermoelectric element 332 whose temperature changes as a current flows, thereby controlling a temperature through heat exchange with the gas fuel G; And
A pressure control unit 320 for controlling the pressure of the gas fuel G introduced into the moving space 310; Including,
The thermoelectric element 332 is disposed adjacent to the gas inlet 340 to which the gas fuel G is supplied in the moving space 310 to adjust the temperature of the gas fuel G. A second temperature control is disposed adjacent to the gas discharge port 350 through which the gas fuel G whose pressure is changed by the pressure adjusting unit 320 is discharged, and controls the temperature of the gas fuel G. Regulator provided with a thermoelectric element comprising means (322b).

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