KR100603502B1 - Car egr cooler thermal cycle test system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for testing an EGR cooler installed in a vehicle to prevent environmental pollution. The present invention can perform a thermal cycle test or a thermal shock that changes the temperature of hot air supplied to an EGR cooler significantly, rapidly and repeatedly. The present invention relates to a vehicle EGR cooler heat cycle tester.

The automotive EGR cooler heat cycle test apparatus of the present invention comprises an air induction device for injecting high temperature air corresponding to the engine exhaust gas into the EGR cooler and a coolant induction device for injecting coolant into the EGR cooler. The air is heated by a multi-stage apparatus of air preheating means, primary heating means, and secondary heating means connected in series. A primary bypass unit 201 is provided in an inlet pipe of the air preheating means, and the primary heating means. A secondary bypass engine 202 is connected to an inflow pipe of the secondary bypass unit 203 to an inlet pipe of the secondary heating means, and the bypass engines 201, 202 and 203 are connected in parallel. One bypass pipe 200 is connected to the outlet pipe of the secondary heating means, and each of the bypass pipes 201, 202, 202 and on / off valves 201a, 201b, 202a, respectively, (202b) (202a) and (202b) are provided.

EGR cooler, heat cycle, thermal shock, electric heater, burner, heat exchanger

Description

CAR EGR COOLER THERMAL CYCLE DEVICE {CAR EGR COOLER THERMAL CYCLE TEST SYSTEM}

1A is a front view of an EGR cooler for an automobile,

1B is a right side view of an EGR cooler for an automobile,

2 is a block diagram of a conventional vehicle EGR cooler test apparatus,

3 is a block diagram of a vehicle EGR cooler heat cycle test apparatus using an electric heater according to the present invention,

4 is a block diagram of a vehicle EGR cooler heat cycle test apparatus using a burner according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: EGR cooler 11: body

12: exhaust pipe 13: right flange

14: left flange 15: cooling water inlet pipe

16: Coolant outflow pipe

21: air compressor 22: storage tank

23: air supply line 24: control valve

25: pressure sensor 26: mass flow meter

27: waste heat exchanger 28, 28a, 28b, 28c, 28d: electric heater

29: heated air inlet pipe 29a, 29b: inlet pipe

30, 30a, 30b: control valve 31: waste discharge pipe

31a, 31b: outlet pipe 32: control valve

33: safety valve 34: flow meter

41: water tank 42: electric heater

43: water supply pipe 43a, 43b: water inlet pipe

44: water pump 45: pressure sensor

46: temperature sensor 47: flow sensor

48: water return pipe 48a, 48b: water outlet pipe

49: cooler 50: flow hydraulic regulator

61: air compressor 62: storage tank

63: air supply pipe 63a: flow meter

63b: control valve 63c: manual open / close valve

63d: Regulator 63e: Pressure sensor

63f: mass flow meter

67: waste heat exchanger 68: exhaust pipe

69: control valve

70: primary heating heat exchanger 71: secondary heating heat exchanger

72: burner 73: combustion air preheat heat exchanger

74: combustion air supply pipe 75: blower

76: exhaust pipe 77: control valve

81: water tank 82: electric heater

83: water supply pipe 84: water pump

85: pressure sensor 86: temperature sensor

87: mass flow meter 88: water return pipe

88a: regulating valve 89: cooler

90: flow rate hydraulic regulator 91: refrigeration compressor

101: heated air inlet pipe 102: heated air outlet pipe

103: coolant inlet pipe 104: coolant outlet pipe

200: bypass pipe 200a: on-off valve

201: primary bypass organ

201a: on-off valve 201b: on-off valve

202: secondary bypass engine

202a: on-off valve 202b: on-off valve

203: third bypass branch

203a: on-off valve 203b: on-off valve

The present invention relates to a device for testing an EGR cooler installed to prevent environmental pollution by a vehicle, and more particularly, a thermal cycle test that changes the temperature of the hot air supplied to the EGR cooler significantly, rapidly and repeatedly. Or it relates to a vehicle EGR cooler heat cycle tester capable of thermal shock.

As the 21st century enters the world, environmental problems are seriously emerging, and various researches are being conducted in various fields such as automobiles to solve these problems. Among them, EGR cooler (exhaust gas recirculation cooler) has been developed and used to prevent pollution caused by exhaust gas emitted from automobiles. The EGR cooler is a device designed to suppress the generation of NOx by recirculating a portion of the exhaust gas through the engine intake cylinder and lowering the maximum temperature when the fuel burns in the engine. It functions to cool by heat exchange action.

1A and 1B show such an EGR cooler, FIG. 1A is a front view of the EGR cooler, and FIG. 1B is a right side view of the EGR cooler. As illustrated, the EGR cooler 10 includes a plurality of exhaust gas pipes 12 through which exhaust gas flows inside the body 11, and coolant flows around the exhaust gas pipes 12. The exhaust gas flows into the exhaust gas pipe 12 through the right flange 13 and then flows out through the left flange 14. The coolant flows into the space between the body 11 and the exhaust gas pipe 12 through the coolant inlet pipe 15 and then flows out through the coolant outlet pipe 16.

EGR cooler 10 has to reduce the heat quantity (kcal / h) per unit time more than a certain amount compared to before the exhaust gas passing through the EGR cooler 10 passes through the EGR cooler 10 and must also have a good durability to be installed in the vehicle The function can be preferably performed.

Therefore, performance and durability test of the EGR cooler 10 is very important. The present inventors have developed a device for performing performance and durability tests on the EGR cooler and registered it with Patent No. 482411. The pre-registered EGR cooler test apparatus includes an air compressor 21 for producing compressed air, a storage tank 22 for storing compressed air generated in the air compressor 21, and the storage tank as shown in FIG. The air supply pipe 23 for supplying the compressed air of (22), the on-off valve 24 for opening and closing the air flow as installed on the air supply pipe 23, the air supply pipe 23 to detect the air pressure It is installed on the pressure sensor 25, the air supply pipe 23 to measure the mass flow rate of air, and to preheat the air flowing from the air supply pipe 23 using waste heat. A waste heat exchanger 27 having an air inlet, an air outlet, a waste inlet, and a waste outlet, an electric heater 28 for heating air discharged from the waste heat exchanger 27, and a heat in the electric heater 28. Air to test EGR Control valves 30a and 30b respectively configured on the heated air inlet pipe 29 flowing into the cooler 10 and the inlet pipes 29a and 29b branched from the heated air inlet pipe 29 to control the amount of air. ), Control valves 32a and 32b respectively configured on outlet pipes 31a and 31b through which the waste which has passed through the EGR cooler 10 is discharged, and outlet pipes 31a and 31b, and the outlet An air induction apparatus including a waste outlet pipe 31 in which the tubes 31a and 31b are joined and connected to the waste heat exchanger 27 described above; And the water tank 41 for storing the water used for the cooling water, the electric heater 42 for heating the water in the water tank 41, the water heated in the water tank 41 EGR cooler as a test ( 10) a water supply pipe 43 for supplying water, a water pump 44 for supplying water to the EGR cooler 10 installed on the water supply pipe 43, and a water supply pipe installed on the water supply pipe 43 The water return pipe 48 for returning the pressure, temperature, and flow rate to the water tank 41 described above, wherein the coolant passing through the pressure sensor 45, the temperature sensor 46, the flow sensor 47, and the EGR cooler 10 is returned to the aforementioned water tank 41. ), A cooler 49 for cooling the water returned as installed in the water return pipe 48, and a flow rate hydraulic regulator 50 for adjusting the flow rate and the hydraulic pressure as installed in the water return pipe 48. Consists of a coolant induction apparatus comprising a. Reference numeral 33 is a safety valve, 34 is an air filter, 35 is a regulator to equalize the pressure, 36 is a control valve to control the amount of waste.

The exhaust gas inlet of the EGR cooler 10 is connected to the inlet pipe 29a of the heated air, and the waste outlet pipe 31a is connected to the exhaust gas outlet of the EGR cooler 10, and the cooling water of the EGR cooler 10 is connected. The water inlet pipe 43a is connected to the inlet pipe 15, and the water outlet pipe 48a is connected to the cooling water outlet pipe 16.

When the endurance test is to be performed, the exhaust gas inlet of the EGR cooler 10 is connected to the inlet pipe 29b of the heated air, and the waste outlet pipe 31b is connected to the exhaust gas outlet of the EGR cooler 10. The water inlet pipe 43b is connected to the cooling water inlet pipe 15 of the EGR cooler 10, and the water outlet pipe 48b is connected to the cooling water outlet pipe 16.

In this state, the air is heated to the test temperature to pass through the EGR cooler 10, and at the same time, the water is also heated to the test temperature to pass through the EGR cooler 10. In the case of the performance test, the test is carried out in the same manner as in the actual vehicle condition, and in the case of the endurance test, severe conditions are given.

Air is generated in the air compressor 21 and temporarily stored in the storage tank 22. In the absence of testing, the on-off valve 24 is closed and the on-off valve 24 is opened during the test. When the on-off valve 24 is opened, the compressed air passes through the air filter 34, the pressure sensor 25, the safety valve 33, and the mass flow meter 26 to be primarily warmed by the waste heat exchanger 27. . The safety valve 33 discharges air when the pressure inside the air supply pipe 23 is greater than or equal to a certain level to prevent a safety accident. In the flowmeter 34, the air flow rate, the pressure sensor 25, the air pressure, and in the mass flow meter 26, the mass flow rate of air is sensed or measured.

The waste heat exchanger 27 functions to heat the air introduced by the heat exchange action of the waste air flowing into the waste exiting the air induction apparatus. In the waste heat exchanger 27, the air is warmed to about 60 ° C. Air primarily heated in the waste heat exchanger 27 may be heated to 800 ° C. in the electric heater 28. As shown in the drawing, since the four electric heaters 28a, 28b, 28c, and 28d are sequentially heated, the temperature of the air can be finely controlled in a large temperature range. Therefore, performance test requiring high temperature air and endurance test requiring relatively low temperature can be performed in one device. In the performance test, the air is heated to approximately 450 ° C and in the endurance test, the air is heated to approximately 525 ° C.

The air heated to the test temperature enters the EGR cooler 10 as a test product through the inlet pipe 29a or the inlet pipe 29b and exits through the outlet pipes 31a and 31b. The amount of air passing through the specimen is controlled by the control valves 30a and 30b and the control valves 32a and 32b provided on the inlet pipes 29a and 29b and the outlet pipes 31a and 31b. .

In the case of the performance test, the control valve 30a and the control valve 32a are opened and the control valve 30b and the control valve 32b are shut off, whereas in the endurance test, the control valve 30b and the control valve are controlled. The valve 32b is opened and the control valve 30a and the control valve 32a are shut off.

As described above, the waste passed through the test article enters the waste heat exchanger 27 and heats the incoming air, and then is discharged to the outside.

Next, the circulation of the cooling water will be described. The water stored in the water tank 41 is heated to the test temperature by the electric heater 42. The temperature of the water (cooling water) required for the test of the EGR cooler (10) is about 30 ° C for the endurance test and about 85 ° C for the performance test. The cooling water is circulated by the water pump 44 provided on the water supply pipe 43. The pressure and flow rate of the water flowing through the water supply pipe 43 are measured by the pressure sensor 45 and the temperature sensor 46. The cooling water is introduced into the EGR cooler 10 for performance test or durability test through the water inlet pipes 43a and 43b. The coolant passing through the EGR cooler 10 is cooled in the cooler 49 through the water return pipe 48 and then returned to the water tank 41.

As described above, the air and water adjusted to the test temperature are passed through the EGR cooler 10, which is a test sample, in a real vehicle state, thereby performing performance and durability tests. As described above, the temperature of air and water is 450 ° C for air and 85 ° C for water, and 525 ° C for air and 30 ° C for water.

This pre-registered automotive EGR cooler test device heats the air supplied to the EUT by connecting four electric heaters 28 in series, so that it can be heated to a wide temperature range. Performance tests requiring high temperatures can be performed on a single test apparatus. In addition, the pre-heated air is first preheated by using the waste discharged through the test product, so that the cost of the test can be reduced, and the temperature can be finely adjusted to obtain accurate test data.

In addition, by controlling a plurality of control valves it is possible to variously adjust the pressure of the air supplied to the EGR cooler (10).

As mentioned above, the pre-registered EGR cooler test apparatus can perform performance test and endurance test, but it does not change the temperature of the air supplied to the EGR cooler greatly and suddenly so that the hot air temperature changes periodically or the thermal shock There was a problem that the test could not be performed.

The present invention has been made in view of the above problems, and the temperature change of the hot air flowing into the EGR cooler periodically and rapidly to change the temperature of the hot air functioning as the exhaust gas to the EGR cooler periodically It is an object of the present invention to provide a vehicle EGR cooler test apparatus capable of conducting a changing thermal cycle test and a thermal shock test rapidly changing a temperature change.

In order to achieve the above object effectively, the present invention provides an EGR cooler test apparatus comprising an air induction apparatus for injecting high temperature air corresponding to engine exhaust gas into an EGR cooler and a coolant induction apparatus for injecting cooling water into the EGR cooler. The air induction apparatus is configured to heat air by a multi-stage apparatus of air preheating means, primary heating means, and secondary heating means connected in series, and a primary bypass engine is provided at an inlet pipe of the air preheating means. A bypass pipe connecting the secondary bypass pipe to the inlet pipe of the primary heating means and the third bypass pipe to the inlet pipe of the secondary heating means, and the bypass pipe connecting the bypass pipes in parallel to the outlet pipe of the secondary heating means. It is connected to, characterized in that each of the bypass pipes and inlet pipes respectively installed on and off valves.

The automobile EGR cooler heat cycle test apparatus of the present invention also heats the air supplied by the air induction apparatus using an electric heater, wherein the air preheating means is a waste heat exchanger, and the primary heating means is an electric heater, The secondary heating means is characterized in that the electric heater.

The automotive EGR cooler thermal cycle test apparatus of the present invention also heats the air supplied by the air induction apparatus using a burner in stages, wherein the air preheating means is a waste heat exchanger, and the primary heating means is a primary heating heat exchanger. The secondary heating means is characterized in that the secondary heating heat exchanger.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a configuration diagram of a heat cycle test apparatus for an automotive EGR cooler according to an embodiment of the present invention, and FIG. 4 is a configuration diagram of a heat cycle test apparatus for an automotive EGR cooler according to another embodiment of the present invention.

The EGR cooler test apparatus of the present invention comprises an air induction apparatus for injecting high temperature air corresponding to the engine exhaust gas into the EGR cooler and a coolant induction apparatus for injecting cooling water into the EGR cooler.

EGR cooler test apparatus of the embodiment shown in Figure 3 is to heat the air used in the test using the electric heater 28, except the air supply pipe for the heat cycle test and thermal shock test is shown in Figure 2 Since the same as the test apparatus of the description of the same parts will be omitted. The electric heater 28 is composed of four electric heaters 28a, 28b, 28c and 28d connected in series for stepwise heating of the supplied air.

In the air induction apparatus of the EGR cooler test apparatus of this embodiment, the means for heating the air supplied to the EGR cooler 10 is composed of a plurality of stages, the waste heat exchanger 27 as the air preheating means, the electric heater as the primary heating means. (28a) 28b, electric heaters 28c and 28d are constituted as secondary heating means, and the air supplied to the EGR cooler 10 is sequentially heated by these means. The air supply pipe for the heat cycle test or the thermal shock test includes a primary bypass pipe 201 in the inlet pipe of the waste heat exchanger 27 which is the air preheating means, and the electric heaters 28a and 28b as the primary heating means. The secondary bypass engine 202 is connected to the inlet pipe of the secondary bypass unit 202, and the secondary bypass engine 203 is connected to the inlet pipe of the electric heaters 28c and 28d as secondary heating means. The bypass pipe 200 connecting 202 and 203 in parallel is connected to the outlet pipe of the secondary heating means, and is opened and closed to each of the bypass branch pipes 201, 202 and 203 and the inflow pipes, respectively. The valves 201a, 201b, 202a, 202b, 203a, and 203b are provided, and the opening / closing valve 200a is provided in the bypass pipe 200.

EGR cooler test apparatus of the embodiment shown in Figure 4 is to heat the air used in the test using a burner.

The air induction apparatus of this embodiment is a device for injecting high-temperature air corresponding to engine exhaust gas into the EGR cooler 10, which produces compressed air and stores compressed air generated by the air compressor 61. The storage tank 62, the air supply pipe 63 for supplying the compressed air of the storage tank 62, the air introduced from the air supply pipe 63 is preheated by using heat of waste air inlet and air outlet And a waste heat exchanger (67) having a waste inlet and a waste outlet, a primary heat exchanger (70) for preheating air supplied from the waste heat exchanger (67), and a primary heat exchanger (70). Secondary heat exchanger 71 for supplying waste heat and heating the air supplied from the primary heating heat exchanger 70, burner 72 for burning fuel to supply combustion heat to the secondary heating heat exchanger (71) In the primary heating heat exchanger (70) Using an output exhaust gas is composed of a burner 72, a combustion air pre-heating heat exchanger 73 to preheat the combustion air to be supplied to.

The air supply pipe (63) is provided with a flow meter (63a) indicating the amount of air flowing, the control valve (63b) and the manual opening and closing valve (63b) for respectively adjusting the amount of air on the air supply pipe (63) branched in parallel ( 63c), a regulator 63d for adjusting the flow rate of air, a pressure sensor 63e for detecting air pressure, and a mass flow meter 63f for measuring the mass flow rate of air are provided. The reason for installing the parts in parallel by branching the air supply pipe 63 is to adjust the flow rate of the supplied air in a wider range.

Combustion air is supplied to the combustion air supply pipe 74, and a combustion air preheat heat exchanger 73 is installed on the air supply pipe 74, and a blower 75 is installed at the air inlet side of the burner 72. It is. Combustion air passes through the secondary heating heat exchanger (71) and the primary heating heat exchanger (72) to the combustion air preheating heat exchanger (73) and is discharged through the exhaust pipe (76).

The waste passing through the EGR cooler 10 is discharged through the exhaust pipe 68 via the waste heat exchanger 67. The control valve 69 is installed in the waste inlet pipe of the waste heat exchanger 67, and the control valve 77 is installed in the waste inlet pipe of the combustion air preheat heat exchanger 73. to be.

And the cooling water induction apparatus of this embodiment is a water tank (81) for storing the water used for the cooling water, an electric heater (82) for heating the water in the water tank (81), heated in the water tank (81) A water supply pipe 83 for supplying water to the EGR cooler 10, which is a test product, a water pump 84 installed on the water supply pipe 83 to supply water to the EGR cooler 10, and the water supply pipe 83. Cooling water passing through the pressure sensor 85, the temperature sensor 86 and the mass flow meter 87, the EGR cooler 10 to measure the pressure, temperature, and flow rate of the water to be supplied and supplied on the water tank 81 Is installed in the water return pipe 88 to return to the water return pipe 88, the cooler 89 for cooling the water returned as the water return pipe 88, and the water return pipe 88. On the water return pipe (88) to control the flow rate hydraulic controller 90, and the cooling water flowing into the water tank (81) below room temperature The heat exchanger 92 is provided in the refrigerator, and the refrigerator 91 which supplies a refrigerant | coolant to the heat exchanger 92 is comprised.

On the water return pipe 88, a control valve 88a for adjusting the flow rate of water is provided.

The EGR cooler 10, which is a test product, is connected to a heated air inlet pipe 101, a heated air outlet pipe 102, a coolant inlet pipe 103, and a coolant outlet pipe 104.

The EGR cooler test apparatus shown in FIG. 4 also includes a means for heating air supplied to the EGR cooler 10 in multiple stages, the waste heat exchanger 27 as the air preheating means, and the primary heat exchanger as the primary heating means. Air 70 and a secondary heating heat exchanger 71 are configured as secondary heating means, and the air supplied to the EGR cooler 10 is sequentially heated by these means. The air supply pipe for the heat cycle test or the thermal shock test includes a primary bypass pipe 201 in an inlet pipe of the waste heat exchanger 67 which is the air preheating means, and a primary heating heat exchanger 70 as the primary heating means. The secondary bypass engine 202 to the inlet pipe of the secondary bypass pipe 202 to the inlet pipe of the secondary heating heat exchanger 71 which is the secondary heating means, and the bypass engine 201 ( The bypass pipe 200 connecting 202 and 203 in parallel is connected to the outlet pipe of the secondary heating means, and is opened and closed to each of the bypass branch pipes 201, 202 and 203 and the inflow pipes, respectively. The valves 201a, 201b, 202a, 202b, 203a, and 203b are provided, and the opening / closing valve 200a is provided in the bypass pipe 200.

Automotive EGR cooler heat cycle test apparatus of the present invention as described above works as follows.

The air induction apparatus and the coolant induction apparatus of FIG. 3 operate in the same manner as the conventional test apparatus of FIG. 2 described above, and the coolant induction apparatus of FIG. 4 is also the same as the conventional test apparatus of FIG. After explaining the operation of the air induction apparatus of the thermal cycle and thermal shock test of the present invention will be described.

The air induction apparatus of FIG. 4 compresses the external air to be used for the test with the air compressor 61 and stores it in the storage tank 62. The burner 72 is ignited while supplying fuel such as gas and petroleum, and the blower 75 is operated to supply oxygen to the combustion chamber through the combustion air supply pipe 74. The combustion gas generated in the combustion chamber is passed through the exhaust pipe 76 through the secondary heating heat exchanger 71 as the secondary heating means, the primary heating heat exchanger 70 as the primary heating means, and the combustion air preheating heat exchanger 73. Discharged. The combustion gas heats the test air while exchanging heat with the air supplied from the storage tank 62 during the movement, and also preheats the combustion air supplied to the burner 72.

The air of the storage tank 62 is preheated by heat exchange with the waste which has passed through the EGR cooler 10 in the waste heat exchanger 67, which is an air preheating means, after passing through various instruments such as the flow meter 63a. EGR cooler (10), which is primarily heated by heat exchange with the combustion gas exhausted from the heat exchanger (70) and secondly heated by heat exchange with the combustion gas in the secondary heating heat exchanger (71). Enter The temperature of the air flowing into the EGR cooler 10 is approximately 450 ° C. for the performance test and approximately 525 ° C. for the endurance test. The waste passing through the EGR cooler 10 is discharged to the outside through the exhaust pipe 68 after passing through the waste heat exchanger 67.

The coolant flows into the EGR cooler 10 through the coolant inlet pipe 103 and then to the coolant outlet pipe 104 and flows to the cooler 89 through the water return pipe 88 to return to the water tank 81. . At this time, when the temperature of the cooling water is above the room temperature, the refrigerator 91 is operated to lower the temperature of the cooling water returned to the water tank 81 by the heat exchange action in the heat exchanger 92.

In the case of the thermal cycle test or the thermal shock test, the passage of air supplied while changing the opening / closing valve 200a in the other open / close valves 201a, 201b, 202a, 202b, 203a and 203b is changed. To allow air of various temperatures to enter the EGR cooler 10. For example, when the lowest temperature air flows into the EGR cooler 10, the on / off valve 201a is opened and the remaining on / off valves 201b, 202a, 202b, 203a, 203b and 200a are closed. In the case of maintaining the state and injecting air of the next step high temperature into the EGR cooler 10, the on-off valve 202a is opened and the remaining on-off valves 201a, 201b, 202b, 203a and 203b are closed. If the air of the next stage high temperature is introduced into the EGR cooler 10, the on-off valve 203a is opened and the remaining on-off valves 201a, 201b, 202a, 202b and 203b are closed. Maintain state. In this way, air of three different temperatures can be introduced into the EGR cooler 10, and a thermal cycle test that changes the temperature of the supplied air freely and periodically, or a thermal shock test that changes the temperature difference of the air drastically and suddenly. Can be done.

In the above, the embodiment of heating the air in three stages has been described, but it can be heated in a larger number of stages by configuring the heating means of the air in series and further configuring the bypass branch pipe. Since the on-off valves are electronic valves, they can be controlled to open and close periodically.

As described above, the present invention not only performs a performance test and endurance test but also a bypass cycle and a shut-off valve for the EGR cooler test device which supplies the supplied air to the electric heater 28 or the burner 72. You can do a test.

As described above, the automotive EGR cooler test apparatus according to the present invention can change the temperature of the hot air functioning as the exhaust gas to the EGR cooler significantly and rapidly, and thus, periodically changes the temperature change of the hot air flowing into the EGR cooler. It has the effect of performing a cycle test and a thermal shock test which changes the temperature change rapidly.

Claims (3)

Air compressors 21 and 61 for producing compressed air and storage tanks 22 and 62 for storing the compressed air generated by the air compressors 21 and 61 are included in the engine to the EGR cooler by air pressure. An air induction device for injecting high temperature air corresponding to the exhaust gas; Water tanks 41 and 81 for storing water used for cooling water, electric heaters 42 and 82 for heating the water in the water tanks 41 and 81, and the water tanks 41 and 81 Water supply pipe (43) (83) for supplying the water heated in the to the EGR cooler (10) as a test product, the water pump (44) installed on the water supply pipe (43) (83) to supply water to the EGR cooler (84), a coolant induction apparatus for injecting coolant into the EGR cooler, including pressure sensors (45) and (85) respectively installed on the water supply pipes (43) and (83) to measure the pressure, temperature, and flow rate of the supplied water. In the EGR cooler test device composed of The air induction apparatus is configured to heat air by a multi-stage apparatus of air preheating means, primary heating means, and secondary heating means connected in series, A primary bypass engine 201 to an inlet pipe of the air preheating means, a secondary bypass engine 202 to an inlet pipe of the primary heating means, and a tertiary bypass engine 203 to an inlet pipe of the secondary heating means ) And a bypass pipe 200 connecting the bypass engines 201, 202, 203 in parallel to the outlet pipe of the secondary heating means, and each bypass engine 201 ( An automotive EGR cooler thermal cycle test apparatus, wherein on-off valves 201a, 201b, 202a, 202b, 202a, and 202b are provided in the inlet pipes. The method of claim 1, The air induction apparatus gradually heats the air supplied using the electric heater 28, wherein the air preheating means is a waste heat exchanger 27, and the primary heating means are electric heaters 28a and 28b, The vehicle EGR cooler heat cycle test apparatus, characterized in that the secondary heating means are electric heaters (28c) (28d). The method of claim 1, The air induction device is to gradually heat the air supplied by using the burner 72, the air preheating means is a waste heat exchanger (67), the primary heating means is a primary heating heat exchanger (70), 2 The vehicle heating means EGR cooler heat cycle test apparatus, characterized in that the secondary heating heat exchanger (71).

Images