KR101553905B1

KR101553905B1 - External gas temperature suppression method and system for military vehicle's stealth

Info

Publication number: KR101553905B1
Application number: KR1020150056945A
Authority: KR
Inventors: 이수인; 정상철
Original assignee: 국방과학연구소
Priority date: 2015-04-23
Filing date: 2015-04-23
Publication date: 2015-09-17

Abstract

The present invention relates to an infrared stealth method which lowers temperature of exhaust gas before being released out from a vehicle, thereby reducing a possibility of being detected from an enemy. the present invention comprises: an intake pipe drawing in external air; an exhaust pipe releasing the exhaust gas; an external air flowing pipe transporting the air introduced from the intake pipe to the exhaust pipe to lower temperature of the exhaust gas released from the exhaust pipe by one side being connected to the intake pipe and the other side to the exhaust pipe; and an external air flowing pipe controlling apparatus connected to the external air flowing pipe to control flux in the external air flowing pipe in order to control flux of the external air transported to the exhaust pipe.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas temperature control system for a vehicle stealth,

The exhaust gas discharged from the dynamometer of the combat vehicle emits a high intensity medium-infrared ray. The present invention relates to an infrared stealth technique capable of reducing the possibility of contamination from the enemy by lowering the exhaust gas temperature before the exhaust gas exits the vehicle.

The dynamometer mounted on the combat vehicle inevitably emits high-temperature exhaust gas. Normally, the temperature of the exhaust gas reaches several hundred degrees centigrade or more, and radiates mainly infrared rays in the band of 3 to 5 占 퐉.

The above-mentioned medium infrared rays are not only naturally low in the atmosphere but also artificially generated by a dynamometer or the like, except for a special situation such as a volcanic activity as well as a low degree of attenuation in the atmosphere. Thus, most infrared tracking weapon systems detect mid-infrared rays and detect objects (ie, combat vehicles).

Therefore, in order to protect the combat vehicle from the infrared tracking-based weapons, the combat vehicle needs to actively reduce the amount of medium infrared radiation contained in the exhaust gas from the internal combustion engine. In other words, combat vehicles can reduce the probability of detection of combat vehicles from weapons based on infrared tracking by reducing the amount of mid-infrared radiation.

On the other hand, the intensity of the infrared ray according to the temperature follows the Planck curve of FIG. 1 based on the black body. Thus, according to Stefan-Boltzmann's law, if the temperature of the exhaust gas contained in the dynamometer is lowered twice, the medium infrared radiation dose can be reduced by a factor of 16.

Since the actual combat vehicle is not a perfect black body, there will be some differences, but the lower the exhaust gas temperature is, the lower the radiant amount of middle infrared rays. That is, even in an actual combat vehicle, by lowering the temperature of the exhaust gas, the infrared stealth performance of the combat vehicle can be improved exponentially.

Accordingly, various attempts have been made in the past to lower the exhaust gas temperature in order to improve the infrared stealth performance by using the above characteristics.

For example, a method of lowering the exhaust gas temperature by mixing external air and exhaust gas is widely used in aircrafts and warships. For example, in order to lower the temperature of the exhaust gas, a method may be employed in which the exhaust gas flow path is narrowed based on the Bernoulli theorem and the exhaust gas pressure is lowered to receive the external gas.

In fact, in the case of a trap using this infrared stealth technology, there is a visible effect such as reducing the exhaust gas occupying 90% or more of the infrared radiation source emitted from the entire trap by 95%.

However, in the case of a combat vehicle, besides physical blocking means such as a shielding / gastrointestinal membrane, there is no great consideration for infrared stealth. Thus, the present invention proposes a method for improving the infrared stealth performance by reducing the exhaust gas temperature emitted from the dynamometer in a combat vehicle.

It is an object of the present invention to provide a combat vehicle with low detection probability.

It is another object of the present invention to provide a combat vehicle with high fuel efficiency.

The present invention relates to an exhaust gas purifying apparatus for an exhaust gas purifying apparatus for purifying an exhaust gas purifying apparatus for purifying an exhaust gas to be exhausted from the exhaust pipe so as to lower the temperature of the exhaust gas discharged from the exhaust pipe, And an outside air pipe valve connected to the outside air pipe to adjust the flow rate of the outside air pipe to adjust the flow rate of the outside air to be delivered to the exhaust pipe.

In one embodiment, the air conditioner further includes an air intake pipe for sucking outside air and supplying the air to the outside air duct.

According to the present invention, there is provided an air conditioner comprising: a high-pressure tank which compresses an intake pipe for sucking outside air, an exhaust pipe for exhausting the exhaust gas, and outside air and converts the compressed air into compressed air, And the other side is connected to the high pressure tank so as to lower the temperature of the exhaust gas by delivering the compressed air suction pipe connected to the engine and the compressed air suction pipe connected to the high pressure tank and the compressed air stored in the high pressure tank to the exhaust pipe, And a connected compressed air exhaust pipe.

In one embodiment, the compressed air exhaust pipe is coupled at a predetermined angle with respect to the exhaust pipe so that the direction of flow of the outside air to the exhaust pipe coincides with the direction of flow of the exhaust gas flowing through the exhaust pipe.

In one embodiment, a compressed air intake control unit connected to the compressed air intake pipe for controlling the flow rate of the outside air supplied to the high pressure tank, and a compressed air exhaust control unit for controlling the flow rate of the compressed air supplied to the exhaust pipe .

In one embodiment, the apparatus further includes an auxiliary compressed air exhaust pipe connected to the compressed air exhaust control unit to discharge the compressed air to the outside so that the compressed air delivered from the high pressure tank is not transmitted to the exhaust pipe.

The present invention relates to an exhaust gas temperature reducing apparatus for a dynamometer including an intake pipe for sucking outside air, an exhaust pipe for exhausting exhaust gas, and a high-pressure tank for compressing the outside air into compressed air to store compressed air, An exhaust pipe connected to the intake pipe and connected to the exhaust pipe so as to lower the temperature of the exhaust gas discharged from the exhaust pipe, An outdoor air pipe for regulating a flow rate of the outdoor air pipe to regulate a flow rate of outdoor air to be delivered to an exhaust pipe, a compressed air suction pipe connected to the intake pipe at one side thereof for supplying outdoor air to the high pressure tank, And a control unit for controlling the temperature of the exhaust gas so that the compressed air stored in the high-pressure tank is delivered to the exhaust pipe, A compressed air exhaust pipe connected to the tank and connected to the exhaust pipe, and a control unit for controlling the outside air oil pipe, the outdoor air oil pipe valve, the compressed air suction pipe, and the compressed air exhaust pipe so as to reduce the temperature of the exhaust gas. do.

In one embodiment, the compressed air intake pipe is connected to a first region of the outside air pipe instead of the intake pipe, the compressed air exhaust pipe is connected to a second region of the outside air pipe instead of the exhaust pipe, And the second region is an area between the exhaust pipe and the outdoor air-flow valve, with respect to the outdoor air-pipe valve. The second region is an area between the exhaust pipe and the outdoor air- do.

In one embodiment, the apparatus further includes a detector for detecting an external object, and when the control unit senses an external object through the detector, the controller controls the outside air pipe, the compressed air intake pipe, and the compressed air exhaust pipe to reduce the temperature of the exhaust gas. And the outside air is mixed with the exhaust gas.

In one embodiment, the apparatus further includes a temperature sensor for sensing an ambient temperature, and the control unit reduces the temperature of the exhaust gas based on the sensed temperature through the temperature sensor.

The present invention can improve the infrared stealth performance by lowering the temperature of the exhaust gas which is the largest signal emission of infrared rays.

Through this, the present invention can reduce the possibility of detection and attack from the enemy. Further, the present invention can reduce the possibility of detection and shooting from the enemy, and can protect the vehicle and human life.

In addition, the present invention utilizes compressed air hybrid technology to assist the engine to improve fuel economy. When necessary, compressed air can be discharged and mixed with exhaust gas to reduce the exhaust gas temperature. The compressed air tank system is similar to that of the compressed air brake system, and can be dedicated to the brake system. That is, the present invention can simultaneously improve fuel economy and braking force.

1 is a graph showing the Planck curve.
2 is a conceptual diagram showing a system structure of a conventional dynamometer without a supercharger.
3 is a conceptual diagram showing a system structure of a dynamometer equipped with a supercharger driven by the force of an engine.
4 is a conceptual diagram showing a system structure of a dynamometer equipped with a turbocharger.
5 is a conceptual diagram showing a case where the compressed air hybrid system 40 is applied to the dynamometer.
FIG. 6 is a conceptual diagram showing that a dynamometer of a combat vehicle according to the present invention is provided with an outside air mixing portion.
FIG. 7 is a conceptual diagram showing a compressed air hybrid system and a hybrid mixing unit in a dynamometer of a combat vehicle according to the present invention.
FIG. 8 is a conceptual diagram showing that a hybrid mixing unit is provided together with an exhaust part of a dynamometer of a combat vehicle according to the present invention.
9 is a graph showing the relationship between the amount of compressed air emission and the temperature of the exhaust gas.
FIG. 10 is a conceptual diagram showing a hybrid air mixing system, a compressed air hybrid system, and a hybrid mixing unit of a dynamometer of a combat vehicle according to the present invention.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The technical idea of the present invention is determined by the claims, and the following embodiments are merely a means for effectively explaining the technical idea of the present invention to a person having ordinary skill in the art to which the present invention belongs.

In the following description, the same components are denoted by the same reference numerals.

Hereinafter, a method for reducing exhaust gas temperature for stealth of a combat vehicle and its apparatus will be described in more detail with reference to the drawings. However, this is merely an example and the present invention is not limited thereto.

Stealth technology includes radar waves absorbing paint technology (radar stealth), body design technology to prevent reflection of radar waves, technology to reduce engine exhaust emissions (infrared stealth), noise suppression to avoid acoustic detection Or a technique of absorbing or refracting sound waves (acoustic stealth). The present invention relates to an infrared stealth function for implementing a stealth technique by lowering the temperature of exhaust gas of a combat vehicle among them.

On the other hand, in the field of combat vehicles, interest in diesel technology and hybrid technology for dynamometers is increasing due to the trend of global warming and eco-friendly tendency spreading.

Diesel technology is generally difficult to attain high output by increasing supercharger or turbocharger by basically installing supercharger or turbo charger because it is difficult to achieve high rpm due to vibration due to the nature of technology using compression ignition.

Hybrid technology is the most common way to use motors and batteries, but the so-called compressed air hybrid or hybrid air is also one of the technologies that have received much attention.

As an example of the compressed air hybrid technique, a system having a high pressure tank and a low pressure tank and containing air and incompressible fluid may be used. A pressure transfer fluid for transferring pressure is present in the high pressure tank and the low pressure tank, and a pump or a valve for transferring the pressure transfer fluid may be provided. The pump or valve can compress or regulate the air sucked or discharged into the high pressure tank and the low pressure tank.

In this case, when the output of the engine is left or the regenerative braking is performed, a fluid mechanically coupled to the transmission is operated to transfer the fluid in the low-pressure tank to the high-pressure tank, thereby compressing the air in the high- As the air inside the high-pressure tank expands, the pump is driven by the force and the power is transmitted to the vehicle through the transmission mechanically coupled to the pump. This method is advantageous in that the energy storage density is relatively low compared to the case where the battery is used as an energy storage device, but the structure of the vehicle is simple and the price is high.

Also, there is a compressed air brake system as a brake system mainly applied to large vehicles. This is a brake system in which air is compressed and stored through the force of the engine and is braked by releasing compressed air when the brake is required and by bringing the brake shoe into close contact with the drum. There is an association point.

The apparatus for reducing the exhaust gas temperature for stealth of the combat vehicle according to the present invention may be varied depending on the internal combustion engine system of the combat vehicle and the presence or absence of the auxiliary device such as the turbocharger. Accordingly, the present invention proposes an exhaust gas temperature reduction device applicable to both supercharger, turbocharger supercharger, and supercharger, which are typically used in combat vehicles.

1 is a graph showing the Planck curve. Most of the mid-infrared radiation from combat vehicles is generated by the engine and exhaust gases. The degree of radiation of the medium infrared rays follows the Planck curve of FIG. 1 and increases in proportion to the fourth power of the absolute temperature according to Stefan-Boltzmann's law (Equation 1).

[Equation 1]

(E: energy, σ: Stefan-Boltzmann constant, T: absolute temperature)

According to the Stefan-Boltzmann law, if the temperature of the heat source is reduced by a factor of 1/2, the emitted infrared radiation can be reduced by 1/16. That is, by lowering the temperature of the exhaust gas of the combat vehicle, the possibility of detection of the enemy by infrared rays can be extremely reduced.

On the other hand, the engine has a large amount of infrared radiation, but it is easy to shield through the vehicle body. However, since the exhaust gas must be released into the atmosphere, it is difficult to shield the exhaust gas itself. Therefore, a combat vehicle requires a separate method for lowering the temperature of the exhaust gas emitted. Accordingly, the present invention proposes a method of discharging exhaust gas by mixing exhaust gas with outside air.

Hereinafter, the structure of the dynamometer of the combat vehicle will be described with reference to the drawings.

2 is a conceptual diagram showing a system structure of a conventional dynamometer without a supercharger. 3 is a conceptual diagram showing a system structure of a dynamometer equipped with a supercharger. 4 is a conceptual diagram showing a system structure of a dynamometer equipped with a turbocharger. 5 is a conceptual diagram showing a case where the compressed air hybrid system 40 is applied to the dynamometer.

Hereinafter, a dynamometer refers to a concept of a top level, in which a power train is installed and a device such as a hybrid system, a compressed air tank, and the like is included. The powertrain referred to above refers to a powertrain in an extended sense including an internal combustion engine as well as a power transmission system such as a transmission and a differential.

2, a dynamometer without a turbocharger may include an intake unit 10, an exhaust unit 20, and a power train 30.

The intake unit 10 sucks air and transfers the air to the power train 30. The power train 30 is constituted by a transmission or the like to operate the vehicle and the exhaust unit 20 is connected to the power train 30 And the exhaust gas delivered from the intake unit 10 can be discharged to the outside.

Hereinafter, a dynamometer equipped with a supercharger will be described. 3, the dynamometer equipped with the supercharger includes an air filter 11, a supercharger 12, a supercharger engine power transmitting portion 12-1, an intercooler 15 An intake manifold 17, a cylinder 31-1, an exhaust manifold 21, a soot reduction section 23, a noise reduction section 25, a crankshaft 32 and a transmission 33 . 3, in the case of a supercharger driven by the power of a motor, the supercharger engine power transmission portion 12-1 is not included and a motor (not shown) and a high voltage line (not shown) . The present invention is applicable to both a supercharger driven by the power of an engine and a dynamometer including a supercharger driven by the power of the motor.

More specifically, the supercharger 12 is driven by the supercharger engine power transmission unit 12-1 to compress the air passing through the air filter 11, The air can be compressed while rotating with power.

The compressed air is caused to rise in temperature by the compression, and can be cooled through the intercooler 15. The air cooled through the intercooler 15 is supplied to the cylinder 31-1 through the intake manifold 17 and then combusted at the intake manifold 17 to be exhausted at a high temperature. The exhaust gas generated in the intake manifold 17 is discharged to the atmosphere through the exhaust manifold 21, the soot reduction section 23, and the noise reduction section 25. [ On the other hand, the kinetic energy generated in the combustion is converted into a rotational motion of the crankshaft 32, is changed to a proper rotational speed in the transmission 33, and is transmitted to the axle 34.

Referring to FIG. 4, the dynamometer equipped with the turbocharger includes a structure similar to the structure described above with reference to FIGS. 2 and 3, except that the supercharger 12 is replaced by a turbocharger compression unit 13-1, An axis 13-2 and a turbocharger turbine section 13-3. That is, in the case of the dynamometer equipped with the turbocharger, the air sucked through the air filter 11 can be compressed through the turbocharger compression unit 13-1 instead of the supercharger 12. [ The turbocharger compression section 13-1 is connected to the turbocharger turbine section 13-3 through the exhaust gas through the turbocharger shaft 13-2.

Meanwhile, the dynamometer according to the present invention may further include an exhaust gas recirculation (EGR) device for reasons such as reduction of NOx (nitrogen gas) separately from the supercharger and the turbocharger. The exhaust gas recirculation device may include a bypass duct 27, a bypass duct flap 27-1, an EGR cooler 26, and an EGR valve 28-1.

More specifically, the bypass duct flap 27-1 controls the flow of the exhaust gas flowing into the bypass duct 27 according to the temperature of the exhaust gas flowing through the bypass duct 27 Can be adjusted. Also, the EGR cooler 26 regulates the exhaust gas temperature flowing through the bypass duct 27, and the EGR valve 28-1 regulates the degree of exhaust gas recirculation.

Since the infrared stealth system according to the present invention can be applied to all dynamometers irrespective of whether there is a supercharger or a supercharger, the following description will exemplarily show a case in which a turbocharger is mounted.

Hereinafter, a dynamometer equipped with a compressed air hybrid system will be described with reference to FIG.

5, the compressed air hybrid system 40 includes a hydraulic pump 41, a high-pressure tank connection 42, a high-pressure tank 43, a low-pressure tank connection 44, a low- 46).

5, one side of the engine power transmission shaft or the hydraulic pump 41 fastened to the transmission 33 is connected to the high-pressure tank 43 through the high-pressure tank connecting portion 42, and the other side is connected to the low- Pressure tank 45 through the high-pressure pipe 44. The high pressure tank connection portion 42 or the low pressure tank connection portion 44 and the low pressure tank connection portion 44 are formed in order to prevent the water in the tank from solidifying and crystallizing due to a sudden pressure change in the high pressure tank and the low pressure tank, The heat generating portion 46 can be fastened.

The heating unit 46 may include a resistor or the like and may be heated by receiving power. More specifically, the heat generating unit 46 may receive heat of the heat source such as the engine cooling system or the exhaust unit 20, and may generate heat. Alternatively, the foot portion 46 may be replaced by arranging a compressed air hybrid system 40 near the engine cooling system (not shown) or the exhaust portion 20.

Unlike the above, there may be a method of designing the use of the specific fluid and the tank structure in order to prevent the durability and performance deterioration of the tank without using the heat generating portion 46. The specific fluid may be a medium for transferring the pump power, and a material having a specific gravity higher than that of water and ice may be used. Further, the specific fluid may be a substance having a low oxidizing property. In addition, the specific fluid may be a non-polar solvent for easy mixing with water.

The high pressure tank connecting portion 42 and the low pressure tank connecting portion 44 are provided at the lower ends of the high pressure tank 43 and the low pressure tank 45 to prevent water and ice from approaching each other, It is possible to prevent problems of component durability and performance that are generated by crystallization.

The structure of a conventional dynamometer has been described above.

Hereinafter, a configuration in which a device for reducing the temperature of exhaust gas is added to a combat vehicle including the respective dynamometers will be described.

FIG. 6 is a conceptual diagram showing that a dynamometer of a combat vehicle according to the present invention is provided with an outside air mixing portion.

The dynamometer of the combat vehicle according to the present invention may include an outside air mixing unit 50 for mixing exhaust gas with an external gas. The outside air mixer 50 includes an outside air pipe 51 and an outside air pipe 51-1 for controlling the flow of outside air to the outside air pipe.

The outside air pipe 51 is connected to the exhaust pipe 24 and is capable of sucking outside air. That is, according to the present invention, the temperature of the exhaust gas passing through the exhaust part can be lowered by mixing the exhaust gas with the outside air sucked in the outside air pipe (51).

The outside air pipe 51 may be provided with a separate air suction unit for sucking sufficient outside air. However, it is possible to solve the problem by introducing the supercharged air through the supercharger 12, the turbo charger 13, It is also possible. Accordingly, as shown in FIG. 6, the outside air pipe 51 is connected to the intake pipe 14, and the outside air can be introduced from the intake pipe 14.

The outdoor air pipe valve 51-1 or the outdoor air pipe control device can control the flow rate of the outdoor air sucked from the outdoor air pipe 51 to the exhaust pipe 24. For example, when the outside air pipe valve 51-1 is closed, the flow rate of outside air to be delivered to the exhaust pipe 24 is reduced, and when the outside air pipe valve 51-1 is opened, The flow rate of the ambient air to be delivered can be increased. Hereinafter, the outdoor air pipe control valve and the outdoor air pipe control device control outdoor air to be delivered to the exhaust pipe 24, and they are used in combination.

Of course, when a separate air inhaler is installed, a separate air inhaler may replace the role of the outside air inlet valve 51-1. More specifically, when the outside air pipe 51 is simply connected to the intake pipe, the amount of air to be blown into the outside air pipe 51 varies depending on whether the supercharger is operated or not. However, apart from the operation of the turbocharger, the amount of air inflow to the outside air pipe must be adjusted, and it is necessary to provide an outside air pipe valve 51-1 considering the operation of the turbocharger.

On the other hand, FIG. 6 illustrates a case where a supercharger (for example, a turbocharger) is included, but can be easily applied even when the supercharger is not included.

In the foregoing, the method of reducing the temperature of the exhaust gas by mixing the outside air and the exhaust gas using the outside air mixing portion 50 has been described.

Hereinafter, a method of reducing the temperature of the exhaust gas by using the compressed air hybrid technique will be described.

FIG. 7 is a conceptual diagram showing that a hybrid mixing unit is provided in a dynamometer of a combat vehicle according to the present invention. FIG. 8 is a conceptual diagram showing a hybrid mixer and an exhaust gas arrangement structure in a dynamometer of a combat vehicle according to the present invention. 9 is a graph showing the relationship between the amount of compressed air discharged and the temperature of the exhaust gas. 10 is a conceptual diagram showing that a dynamometer of a combat vehicle according to the present invention is provided with an outside air mixing unit and a hybrid mixing unit.

First, the present invention can mix outdoor air and exhaust gas by using a hybrid technique without the outside air mixing part 50. [

7, the hybrid mixing unit 60 includes a compressed air intake pipe 47, a compressed air intake control unit 47-1, a compressed air exhaust pipe 48, a compressed air exhaust control unit 48-1, And a supplementary compressed air exhaust pipe 48-2.

The compressed air suction pipe 47 is branched from the suction pipe 14 and can suck a part of the air entering the suction pipe 14 through the air filter 11. [

The compressed air suction control unit 47-1 is connected to the compressed air suction pipe 47 to adjust and compress the suction amount of the sucked air. The compressed air suction regulating unit 47-1 may include a switch function for controlling whether air is sucked or a pump function for compressing the air entering the intake pipe 14. [ The compressed air suction control unit 47-1 is connected to the high pressure tank 43 and serves to charge the air in the high pressure tank 43 by transmitting the sucked air to the high pressure tank 43 .

The compressed air exhaust pipe (48) is connected to the exhaust pipe (24) to discharge compressed air.

The compressed air exhaust pipe (48) can be designed to be slanted with respect to the exhaust pipe (24) so that the compressed air can smoothly mix the exhaust gas. For example, as shown in FIG. 8, the compressed air exhaust pipe 48 may be connected to the exhaust pipe 24 in an oblique direction so that the direction of flow of the compressed air coincides with the direction of the exhaust gas.

The compressed air exhaust pipe 48 can supply the compressed air to the exhaust pipe 24 so that the flow of the compressed air and the flow of the exhaust gas coincide with each other when the compressed air exhaust control part 48-1 is opened . In addition, an air mixing inducer such as a lobed mixer may be installed at the point 29 where the compressed air and the exhaust gas are mixed, so that compressed air and exhaust gas can be smoothly mixed. In the case where the outside air mixer 50 is provided, the compressed air exhaust pipe 48 is not directly connected to the exhaust pipe 24 but may be connected to the outside air pipe 51 The compressed air exhaust pipe 48 may be connected to one side of the exhaust pipe 24 and the outer air mixing portion 50 may be designed to be connected to the exhaust pipe 24 in an oblique manner And can be designed to be smoothly mixed with the exhaust gas flow.

The compressed air exhaust adjusting part 48-1 is configured in a valve shape so that when the compressed air is to be exhausted, the air delivered from the high pressure tank 43 can be transmitted to the exhaust pipe 24. More specifically, when the exhaust gas and outside air need to be mixed, the compressed air exhaust adjusting part 48-1 can open the valve and deliver the compressed air to the exhaust pipe 24. [ Accordingly, the present invention can lower the temperature of the exhaust gas by mixing the exhaust gas with the outside air and through the mixing. At this time, when the pressure inside the high-pressure tank 43 is high and the discharge amount of the compressed air is large, the temperature of the compressed air discharged by the line-Thomson effect can be lowered to the ambient temperature or less. It is also possible to make the exhaust gas temperature equal to the outside air temperature or below the outside air temperature.

The auxiliary compressed air exhaust pipe 48-2 can discharge the compressed air to the outside without passing the compressed air to the exhaust pipe 24 so that the compressed air is not mixed with the exhaust gas. At this time, the auxiliary compressed air exhaust pipe 48-2 may be connected to the compressed air exhaust control unit 48-1 so that the compressed air is not transmitted to the exhaust pipe 24. The auxiliary compressed air exhaust pipe 48-2 can be used when it is necessary to rapidly discharge the compressed air. When there is water vapor in the air and the compressed air is rapidly discharged to the surrounding ambient air, the auxiliary compressed air exhaust pipe 48-2 may cause a phase change of water vapor to temporarily generate water or ice crystals in the atmosphere.

The auxiliary compressed air exhaust pipe may further include a plurality of compressed air discharge nozzles branched from the auxiliary compressed air discharge pipe. At this time, the plurality of compressed air discharge nozzles may be disposed at different positions on the outer circumferential surface of the vehicle.

That is, when a plurality of auxiliary compressed air exhaust pipes 48-2 are provided at different positions on the outer circumferential surface of the vehicle, a film made of water or ice may be temporarily installed on the entire vehicle. The transmittance of the infrared ray is lowered, so that the vehicle can be concealed effectively.

The auxiliary compressed air exhaust pipe 48-2 may be used as an air brake mainly used in a large-sized vehicle or the like. More specifically, the role of the high-pressure tank and the pump installed in the existing air brake vehicle is replaced by the compressed air suction control unit 47-1 and the high-pressure tank 43, and the auxiliary compressed air exhaust pipe 48-2 is batched Can be used as an air brake in connection with a brake system (not shown) of the vehicle. Also, by using the characteristic of dropping the temperature, the auxiliary compressed air exhaust pipe is connected to one side of a vehicle HVAC (Heating, Ventilation, Air Conditor) and can be used as an air conditioner by adjusting the compressed air discharge amount. On the other hand, the auxiliary compressed air exhaust pipe 48-2 is not an essential component and can be easily changed in design by a designer.

The Hybrid Mixing Unit 60 can reduce the temperature of the exhaust gas by the Rhythm-Thomson effect as described above by transmitting the compressed air to the exhaust pipe 24, and it is possible to reduce the temperature of the low- Since the volume is fixed, the effect is expected to be even greater. More specifically, when the compressed air is discharged through the compressed air exhaust pipe 48, since the compressed air is discharged at a high pressure from a high pressure to a low pressure, it becomes a state close to the thermal expansion. However, since the size of the exhaust pipe 24 that receives the compressed air with a relatively low pressure is fixed compared to the outside air, the compressed air is restricted from expanding. That is, due to the size of the exhaust pipe 24, the compressed air can not easily expand in volume as the pressure drop occurs quickly, and the temperature drops. As shown in FIG. 9, as the discharge speed and amount of the compressed air become faster, the amount of the compressed air to be mixed with the exhaust gas increases, and the temperature of the exhaust gas further decreases. Accordingly, the hybrid mixing section 60 can lower the temperature of the exhaust gas.

On the other hand, when the output demand of the vehicle is high and the pump is driven by the force of the compressed air inside the high-pressure tank to transmit the power to the vehicle and to lower the temperature of the exhaust gas, And stopping and opening and closing of the valve of the compressed air exhaust adjusting part 48-1 can be performed. That is, the present invention can perform the opening and closing of the valve after performing the operation and the stop of the pump, and alternately perform each operation.

At this time, the pump may be connected to the braking portion of the vehicle. The braking portion of the vehicle may perform a function of stopping the running of the vehicle, lowering the speed, etc., and may include a brake, a brake caliper, and the like.

On the other hand, although the supercharger is not shown in Fig. 7, the supercharger (for example, turbocharger) may be equally applied.

In the foregoing, a method of reducing the temperature of the exhaust gas by using the hybrid technique has been described.

Hereinafter, a method for reducing the temperature of the exhaust gas using the ambient air mixing portion 50 and the hybrid mixing portion 60 together will be described.

The present invention can realize an apparatus for reducing the temperature of the exhaust gas by including the outside air mixing unit (50) and the hybrid mixing unit (60) together.

That is, according to the present invention, the temperature of the exhaust gas can be lowered by having any one of the outside-air mixer 50 and the hybrid mixer 60, but both configurations can be combined to lower the temperature of the exhaust gas. In this case, the combat vehicle according to the present invention may further include a control unit (not shown) for controlling the outside air mixing unit 50 and the hybrid mixing unit 60.

Referring to FIG. 10, one side of the outer air mixing part 50 may be connected to the suction pipe 14, and the other side may be connected to the exhaust pipe 24. In addition, the hybrid mixing unit 60 may be connected to the ambient air mixing unit 50. 10, the compressed air suction pipe 47 may be connected directly to the suction pipe 14, independently of the ambient air mixing unit 50. That is, in the present invention, the hybrid mixing unit 60 may be indirectly connected to the ambient air mixing unit 50, or may be connected to the direct suction pipe 14 independently of the ambient air mixing unit 50 . This can be determined by the design of the designer.

Likewise, the compressed air exhaust pipe 48 can be connected to the outside air mixing portion 50 and indirectly connected to the exhaust portion 20, or can be directly connected to the exhaust portion 20 independently of the outside air mixing portion 50 .

The control unit controls the ambient air mixing unit 50 and the hybrid mixing unit 60 independently to lower the exhaust gas temperature or simultaneously use the ambient air mixing unit 50 and the hybrid mixing unit 60, Temperature can be lowered. That is, when the outdoor air mixing unit 50 and the hybrid air mixing unit 60 are independently configured, the control unit lowers the temperature of the exhaust gas through any one of the outdoor air mixing unit 50 and the hybrid mixing unit 60, The outdoor air mixing unit 50 and the hybrid mixing unit 60 may be used together to lower the temperature of the exhaust gas. Accordingly, the present invention can reduce the exhaust gas temperature, improve the fuel efficiency using compressed air hybrids, and reserve compressed air.

The control unit may control the outdoor air mixing unit 50 and the hybrid mixing unit 60 according to the temperature value of the exhaust gas to be lowered, The temperature of the exhaust gas can be controlled through any one of the exhaust gas purifying unit 60, More specifically, the control unit may mix the outside air with the exhaust gas through the outside air mixing unit 50 to lower the temperature of the exhaust gas to the first temperature. In this case, the control unit can lower the temperature of the exhaust gas to the first temperature or lower by mixing the outside air with the exhaust gas through the method described in FIG. That is, according to the present invention, it is possible to lower the temperature of the exhaust gas to an appropriate level through the outside air mixer 50 in a general case in which maximization of the infrared stealth performance is not required.

The control unit may mix the compressed air with the exhaust gas through the hybrid mixing unit 60 to lower the temperature of the exhaust gas to a second temperature lower than the first temperature. In this case, the control unit can lower the temperature of the exhaust gas to a second temperature or less by mixing the outside air with the exhaust gas through the method described with reference to FIG. That is, according to the present invention, when the infrared stealth performance is to be maximized, the temperature of the exhaust gas can be lowered to an appropriate level through the hybrid mixing section 60.

The control unit controls the flow rate of the air sucked and discharged from the ambient air mixing unit 50 and the flow rate of the air mixed in the hybrid mixing unit 60. In the hybrid mixing unit 60, Can be adjusted to suit the situation.

More specifically, when too much air is mixed with the exhaust gas in the ambient air mixer 50, the amount of the mixed exhaust gas increases, so that the degree of temperature reduction due to the effect of the thermal expansion of the compressed air can be reduced . Therefore, when the pressure of the compressed air is sufficiently high or when the amount of compressed air to be discharged is large, the control unit may control the air flow rate It is possible to control the unit 50.

On the other hand, when the compressed air is discharged to lower the exhaust gas temperature, the exhaust gas temperature may have a temperature lower than the outdoor air temperature due to the temperature lowering effect due to adiabatic expansion.

In this case, the present invention may further include a temperature sensor for sensing the ambient temperature to lower the temperature of the exhaust gas to a temperature similar to the ambient temperature. At this time, the controller may control the air flow rate discharged from the ambient air mixer 50 and the hybrid mixer 60 to lower the exhaust gas temperature to a temperature sensed by the temperature sensor.

Particularly, in a vehicle equipped with a detector such as a laser detector, an electro-optical system, or a radar, when the exhaust gas temperature reducing device is used in conjunction with a detector, in a general case where a threat is not identified in the detector, The temperature of the exhaust gas is lowered to an appropriate level through the detector 50 and when the threat such as a missile is discriminated through the detector, the ambient air mixing portion 50 and the hybrid mixing portion 60 are used at the same time, So that the temperature of the exhaust gas can be lowered to a very low temperature for a short time. That is, when the threat is identified through the detector, the control unit maximizes the infrared stealth performance, thereby guiding the loss of the target to the threat from a long distance.

In addition, the present invention can control the performance of infrared stealth by receiving information related to a threat from an external device via a network even when the detector is not mounted. In this case, the present invention may further include a communication unit using a network. That is, the present invention can maximize the infrared stealth capability when the information that the threat is approaching from the external device is received.

In Fig. 10, the supercharger is shown, but the same can be applied even when the supercharger is not included. Through this, the present invention can appropriately adjust the infrared stealth performance to the situation.

The infrared stealth effect can be exhibited by lowering the temperature of the exhaust gas which is the largest signal emission in exerting the infrared stealth effect of the combat vehicle.

In addition, the present invention utilizes compressed air hybrid technology to assist the engine to improve fuel economy. When necessary, compressed air can be discharged and mixed with exhaust gas to reduce the exhaust gas temperature. Thus, the present invention can simultaneously improve fuel economy and braking force.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. I will understand.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

In other words, even if not described above, various modifications can be made by those skilled in the art without departing from the gist of the present invention claimed in claims, But should not be understood individually from the technical idea or viewpoint of the present invention.

Claims

An intake pipe for sucking outside air;
An exhaust pipe for discharging exhaust gas;
An outside air pipe connected to the intake pipe and connected to the exhaust pipe to reduce the temperature of the exhaust gas discharged from the exhaust pipe to the exhaust pipe;
A detector for detecting an external object; And
And an outside air pipe regulating device connected to the outside air pipe to regulate a flow rate of the outside air pipe to regulate a flow rate of outside air to be delivered to the exhaust pipe,
The outside air duct regulation device includes:
Wherein the control unit controls the flow rate of the exhaust gas to the outside air to reduce the temperature of the exhaust gas when an external object is detected through the detector.

The method according to claim 1,
And a supercharger mounted on the intake pipe,
Wherein the outdoor airflow control device adjusts the flow rate according to whether the supercharger is operated or not.

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An intake pipe for sucking outside air;
An exhaust pipe for discharging exhaust gas;
A high pressure tank for compressing outside air and converting it into compressed air to store compressed air;
A compressed air intake pipe having one side connected to the intake pipe and the other side connected to the high pressure tank so as to supply outside air to the high pressure tank;
A compressed air suction control unit connected to the compressed air suction pipe for controlling a flow rate of the outside air supplied to the high pressure tank;
A compressed air exhaust pipe having one side connected to the high pressure tank and the other side connected to the exhaust pipe so as to transfer compressed air stored in the high pressure tank to the exhaust pipe to lower the temperature of the exhaust gas;
A compressed air exhaust control unit for controlling a flow rate of compressed air stored in the high pressure tank supplied to the exhaust pipe; And
And an auxiliary compressed air exhaust pipe connected to the compressed air exhaust control unit to discharge the compressed air to the outside so that the compressed air delivered from the high pressure tank is not transmitted to the exhaust pipe.

5. The method of claim 4,
The compressed air exhaust pipe
Wherein a direction in which the outside air to be delivered to the exhaust pipe flows coincides with a direction in which exhaust gas flowing in the exhaust pipe flows, at a predetermined angle with respect to the exhaust pipe.

6. The method of claim 5,
The compressed air exhaust pipe
Further comprising a mixer for mixing outdoor air to be delivered to the exhaust pipe and exhaust gas flowing through the exhaust pipe.

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5. The method of claim 4,
Wherein the auxiliary compressed air exhaust pipe further comprises a plurality of compressed air discharge nozzles branching from the auxiliary compressed air discharge pipe,
Wherein the plurality of compressed air discharge nozzles are spaced apart from each other at an outer circumferential surface of the vehicle.

5. The method of claim 4,
Wherein the auxiliary compressed air exhaust pipe is connected to one side of the HVAC of the vehicle to reduce an indoor temperature of the vehicle.

5. The method of claim 4,
Further comprising a low pressure tank connected to said high pressure tank,
The high pressure tank and the fluid flowing in the low pressure tank
Wherein the non-polar solvent is a non-polar solvent.

12. The method of claim 11,
A high pressure tank connection portion for connecting the high pressure tank to the transmission of the vehicle; And
And a low-pressure tank connection portion for fastening the low-pressure tank and the high-pressure tank,
The high-pressure tank connection portion
The compressed air in the high-pressure tank moves to the lower portion of the high-pressure tank and is installed at the lower portion of the high-pressure tank so as not to mix with the fluid in the high-pressure tank,
The low pressure tank connection
Pressure tank, and the compressed air in the low-pressure tank moves to a lower portion of the low-pressure tank and is installed at a lower portion of the low-pressure tank so as not to be mixed with the fluid in the low-pressure tank.

13. The method of claim 12,
Further comprising a pump that branches from the high pressure tank and is connected to a braking portion of the vehicle,
Wherein the pump provides the compressed air in the high pressure tank to the braking unit.

5. The method of claim 4,
Further comprising a detector for detecting an external object,
Wherein the high pressure tank, the compressed air intake pipe, and the compressed air exhaust pipe are controlled to reduce the temperature of the exhaust gas when an external object is detected through the detector.

An intake pipe for sucking outside air;
An exhaust pipe for discharging exhaust gas; And
An exhaust gas temperature reducing apparatus of a dynamometer including a high-pressure tank for compressing outside air and converting it into compressed air to store compressed air,
An outside air pipe connected to the intake pipe and connected to the exhaust pipe to reduce the temperature of the exhaust gas discharged from the exhaust pipe to the exhaust pipe;
An outside air pipe regulating device connected to the outside air pipe to regulate a flow rate of the outside air pipe to regulate a flow rate of outside air to be delivered to the exhaust pipe;
Pressure tank, one side of which is connected to a first area of the outside air pipe to supply outside air to the high-pressure tank, and the other side is a compressed air suction pipe connected to the high-pressure tank, An area between the outside oil pipe regulating device;
A compressed air exhaust pipe connected to the high pressure tank at one side and the second region at the outside air pipe to transfer the compressed air stored in the high pressure tank to the exhaust pipe to lower the temperature of the exhaust gas, A region between the exhaust pipe and the outside air pipe regulating device on the basis of the outside air pipe regulating device; And
A control unit for controlling the outside air pipe, the outside air pipe regulation unit, the compressed air intake pipe and the compressed air exhaust pipe so as to reduce the temperature of the exhaust gas,
And a compressed air exhaust control unit for controlling a flow rate of compressed air stored in the high-pressure tank supplied to the exhaust pipe.

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16. The method of claim 15,
Further comprising a detector for detecting an external object,
The control unit
Wherein the control unit controls the outside air pipe, the compressed air intake pipe, and the compressed air exhaust pipe so as to reduce the temperature of the exhaust gas when the external object is detected through the detector, thereby mixing the outside air with the exhaust gas.

18. The method according to any one of claims 15 to 17,
Further comprising a temperature sensor for sensing an ambient temperature,
The control unit
And the temperature of the exhaust gas is reduced based on the sensed temperature through the temperature sensor.

18. The method according to any one of claims 15 to 17,
Further comprising a communication unit for receiving information related to an external object from outside via communication,
Wherein the controller controls the outside air pipe, the outside air pipe regulation device, the compressed air intake pipe, and the compressed air exhaust pipe so as to reduce the temperature of the exhaust gas based on information related to the external object. Device.

16. The method of claim 15,
Further comprising a pump that branches from the high pressure tank and is connected to a braking portion of the vehicle,
Wherein the pump provides the compressed air in the high pressure tank to the braking unit.

21. The method of claim 20,
The control unit
Wherein the controller controls the pump and the compressed air exhaust pipe to perform the operation and stop of the pump and the opening and closing of the compressed air exhaust pipe so as to cross each other.