A rapid cold-heat shock engine test machine

Abstract

The application is suitable for engine testing equipment technology, and provides a rapid cold and hot impact engine testing tester, which comprises a cold and hot water conversion system, a cold water constant temperature system and a hot water constant temperature system, the cold and hot water conversion system comprises a cold exchange plate, a hot exchange plate, an output unit and a heat exchange pipeline system, the heat exchange pipeline system is communicated with the cold exchange plate and the hot exchange plate through pipelines respectively, the cold water constant temperature system and the hot water constant temperature system exchange heat with the heat exchange pipeline system at the cold exchange plate and the hot exchange plate respectively, and the heat exchange pipeline system transports the circulating liquid after completing heat exchange to the output unit to perform temperature rising or temperature lowering operation on the engine. The rapid cold and hot impact engine testing tester provided by the application has high heat exchange efficiency, improves energy utilization rate, and effectively shortens the heat exchange time of the heat exchange pipeline system, thereby improving the working efficiency of the equipment.

Description

Technical Field

[0001] This invention belongs to the technical field of engine testing equipment, and in particular relates to a rapid thermal shock engine testing machine. Background Technology

[0002] GB / T18297-2001, the Test Methods for Automobile Engine Performance, specifies the bench test methods for automobile engines, including test methods for power and economy under various loads, start-up under no-load conditions, test methods for mechanical loss power, and test methods for piston leakage and consumption related to cylinder sealing, etc., in order to evaluate the performance of automobile engines.

[0003] In existing automotive engine performance testing equipment, the circulating fluid inside the engine mostly enters the heating or cooling equipment directly for heat exchange. When the circulating fluid is directly heated or cooled, it travels through long pipelines, which takes a lot of time and consumes a lot of energy during the heat exchange process, resulting in high energy consumption of the equipment. Summary of the Invention

[0004] This invention provides a rapid thermal shock engine testing machine, which aims to solve the problems of long time consumption and high energy consumption in the heat exchange process of existing thermal shock testing equipment.

[0005] This invention is implemented as follows: a rapid thermal shock engine testing machine for engine thermal shock testing, comprising:

[0006] A hot and cold water conversion system includes a cold exchange plate, a heat exchange plate, an output unit, and a heat exchange pipeline system. The circulating fluid in the heat exchange pipeline system, which has a diversion function, exchanges heat with the cold exchange plate and the heat exchange plate and is then sent to the output unit. The output unit delivers the circulating fluid to the engine's cooling system. The circulating fluid that has completed the heat exchange returns to the heat exchange pipeline system through the output unit.

[0007] A cold water constant temperature system is connected to the cooling section of the cold exchange plate to cool the circulating liquid passing through the cold exchange plate.

[0008] A hot water constant temperature system is connected to the heating section of a heat exchange plate to heat the circulating liquid passing through the heat exchange plate.

[0009] Preferably, both the cold exchange plate and the heat exchange plate are heat exchangers, with the cold exchange plate having a circulating liquid inlet I and a circulating liquid outlet I; and the heat exchange plate having a circulating liquid inlet II and a circulating liquid outlet II.

[0010] Preferably, the heat exchange piping system includes:

[0011] A heat conversion three-way valve, wherein the inlet of the heat conversion three-way valve is connected to the internal circulation system, and one outlet of the heat conversion three-way valve is connected to the circulating liquid inlet II;

[0012] A cold-conversion three-way valve, wherein the inlet of the cold-conversion three-way valve is connected to one outlet of a hot-conversion three-way valve; and one outlet of the cold-conversion three-way valve is connected to circulating fluid inlet I.

[0013] The main circuit has a cold conversion check valve at the circulating liquid outlet I and a hot conversion check valve at the circulating liquid outlet II. The cold conversion check valve and the hot conversion check valve are connected to the main circuit through pipelines. The other outlet of the cold conversion three-way valve is connected to the main circuit. The main circuit delivers the circulating liquid to the output unit.

[0014] Preferably, the heat conversion three-way valve and the cold conversion three-way valve are three-way proportional valves.

[0015] Preferably, the main circuit is provided with an outlet pressure gauge, an outlet pressure switch, an outlet temperature sensing wire, and an outlet ball valve in sequence.

[0016] Preferably, the hot and cold water conversion system is equipped with an internal circulation system. The internal circulation system recirculates the recycled liquid from the output unit back to the heat exchange pipeline system. The internal circulation system includes a conversion system circulation pump, an expansion tank, and a gas collection cylinder. The gas collection cylinder is connected to the output unit through a pipeline. The expansion tank is connected to the gas collection cylinder, and the expansion tank is connected to the conversion system circulation pump through a pipeline. The conversion system circulation pump is connected to the inlet of the heat conversion three-way valve through a pipeline.

[0017] Preferably, the chilled water constant temperature system includes a chilled water tank, an internal circulation pump, an external circulation pump, and an internal condensation system. The chilled water tank storing the coolant is connected to the internal condensation system via an internal circulation pump pipeline. The internal condensation system includes a condenser, a compressor, and an evaporator. The coolant delivered by the internal circulation pump exchanges heat with the condensate from the evaporator and the condensate from the condenser. After heat exchange, the condensate enters the compressor for compression and then returns to the condenser for re-condensation. The chilled water tank sends the coolant to the cold exchange plate for heat exchange with the circulating liquid via the external circulation pump.

[0018] Preferably, the hot water constant temperature system includes a heater, a hot water constant temperature circulation pump, and a hot water storage tank. One end of the hot water storage tank, which recovers the hot water storage liquid in the hot water constant temperature system, is connected to a heat exchange plate, and the other end is connected to the hot water constant temperature circulation pump. The hot water constant temperature circulation pump sends the hot water storage liquid in the hot water storage tank to the heater for heating through a pipeline. The hot water storage liquid that has been heated in the heater re-enters the heat exchange plate through a pipeline.

[0019] Preferably, the internal heating system further includes a water replenishment module, which is connected to the pipeline from the hot water storage tank to the hot water constant temperature circulation pump.

[0020] Preferably, the water replenishment module includes a water replenishment pump and a water inlet. The water replenishment pump pumps the water coming in from the water inlet into the hot liquid storage tank and then into the pipeline of the hot water constant temperature circulation pump.

[0021] Compared with the prior art, the embodiments of this application have the following main advantages:

[0022] 1. The rapid thermal shock engine testing machine provided by the present invention allows the circulating fluid to be heated and cooled on the cold exchange plate and the heat exchange plate through the heat exchange pipeline system, which facilitates the rapid heating or cooling of the circulating fluid, saves the time required for the heating and cooling process, and improves the working efficiency of the equipment.

[0023] 2. The rapid thermal shock engine test chamber provided by this invention exchanges heat through a hot and cold water conversion system, a cold water constant temperature system, and a hot water constant temperature system, thereby improving the heat exchange efficiency of the rapid thermal shock engine test chamber, effectively improving energy utilization, and reducing energy consumption. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a rapid thermal shock engine testing machine provided by the present invention.

[0025] Figure 2 This is a schematic diagram of the hot and cold water conversion system of a rapid thermal shock engine testing machine provided by the present invention.

[0026] Figure 3 This is a schematic diagram of the intermediate cooling water constant temperature system of a rapid thermal shock engine testing machine provided by the present invention.

[0027] Figure 4 This is a schematic diagram of the hot water constant temperature system of a rapid thermal shock engine testing machine provided by the present invention. Detailed Implementation

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] This invention provides a rapid thermal shock engine testing machine for testing engines, such as... Figures 1-4 As shown, the rapid thermal shock engine test chamber includes:

[0031] The hot and cold water conversion system 5 includes a cold exchange plate 1, a heat exchange plate 2, an output unit 510, a heat exchange pipeline system, and an internal circulation system. The heat exchange pipeline system is connected to the cold exchange plate 1 and the heat exchange plate 2 through pipes. After heating or condensing the internal circulation system through the cold exchange plate 1 and the heat exchange plate 2, the heat exchange pipeline system sends the appropriate circulating fluid to the output unit to heat or cool the engine.

[0032] The chilled water constant temperature system 3 includes a chilled water tank 301, an external circulation pump 311, an internal circulation pump 312, and an internal condensation system. The internal circulation pump 312, the internal condensation system, and the chilled water tank 301 are connected by pipes. The coolant after condensation and conversion by the internal condensation system is sent to the chilled water tank 301 for storage. The chilled water tank 301, the external circulation pump 311, and the cold exchange plate 1 are connected by pipes. The coolant in the chilled water tank 301 is sent to the cold exchange plate 1 by the external circulation pump 311 to cool the circulating liquid from the hot and cold water conversion system 5. The cooled coolant returns to the chilled water tank 301 through pipes. At the same time, the coolant in the chilled water tank 301 continuously enters the internal condensation system through the internal circulation pump 312 for condensation, ensuring that the coolant in the chilled water tank 301 can meet the purpose of cooling the circulating liquid in the hot and cold water conversion system 5.

[0033] The hot water constant temperature system 4 includes an internal heating system and a hot water storage tank 430. The hot water storage tank 430 is connected to the heat exchange plate 2. The hot water storage liquid recovered from the heat exchange plate 2 first enters the hot water storage tank 430. The hot water storage liquid in the hot water storage tank 430 is heated by the internal heating system and then transported to the heat exchange plate 2 through the pipeline. After the hot water storage liquid reaches the heat exchange plate 2 and heats the circulating liquid from the hot and cold water conversion system 5, it returns to the hot water storage tank 430, completing the entire heat exchange process.

[0034] An engine test bench is used to place an engine, and the output unit 510 is disposed on the engine test bench.

[0035] In this embodiment, the engine test bench is existing technology, providing a fixed platform for the engine testing process. The output unit 510 is located on the engine test bench, facilitating pipe connection with the engine.

[0036] In this embodiment, the output unit 510 is a prior art technology that can control the flow rate and velocity of the circulating fluid entering the engine. The output unit 510 is provided with a circulating fluid inlet III and a circulating fluid outlet III. The engine's cooling system inlet is connected to the circulating fluid inlet III through a pipe, and the engine's cooling system outlet is connected to the circulating fluid outlet III through a pipe. The circulating fluid in the heat exchange pipeline system enters the engine's cooling system through the output unit 510 to complete the thermal shock test on the engine.

[0037] In this embodiment, the heat exchange pipeline system includes a heat conversion three-way valve 540, a cold conversion three-way valve 550, a cold conversion check valve 561, a heat conversion check valve 562, and a main circuit. The inlet of the heat conversion three-way valve 540 is connected to the outlet of the internal circulation system. One outlet of the heat conversion three-way valve 540 is connected to the circulating liquid inlet II on the heat exchange plate 2. The other outlet of the heat conversion three-way valve 540 is connected to the inlet of the cold conversion three-way valve 550. One outlet of the cold conversion three-way valve 550 is connected to the circulating liquid inlet I on the cold exchange plate 1, and the other outlet is connected to the main circuit. The cold exchange plate 1 has a circulating liquid outlet I, which is connected to the cold conversion check valve 561.

[0038] The heat exchange plate 2 is provided with a circulating liquid outlet II, which is connected to the heat conversion check valve 562; the cold conversion check valve 561 and the heat conversion check valve 562 are connected to the main circuit; the main circuit is connected to the output unit 510, and the main circuit sends the circulating liquid that has been condensed or heated to the output unit 510. After heating and cooling the engine, the circulating liquid is sent to the internal circulation system for pressure reduction and stabilization; the circulating liquid that has been pressure reduced and stabilized will be processed again by the cold exchange plate 1 and the heat exchange plate 2 before re-entering the engine cooling system;

[0039] The heat exchange pipeline system processes the circulating fluid according to externally input parameters. The output unit 510 is connected to the engine's cooling system via a pipeline. When the output unit 510 needs to heat up the engine's cooling system, the heat conversion three-way valve 540 opens its outlet to the heat exchange plate 2 and the cold conversion three-way valve 550, while the outlet of the cold conversion three-way valve 550 to the cold exchange plate 1 closes and opens its outlet to the main circuit. Both the heat conversion three-way valve 540 and the cold conversion three-way valve 550 are three-way proportional regulating valves. The flow rate of the heat conversion three-way valve 540 and the cold conversion three-way valve 550 is continuously adjusted according to temperature changes to ensure that the circulating fluid absorbs a constant amount of heat and reaches the output unit 510 to heat the engine. When the heat demand decreases, the flow rate of the circulating fluid from the heat conversion three-way valve 540 to the cold conversion three-way valve 550 increases, and the flow rate of the circulating fluid to the heat exchange plate 2 decreases.

[0040] When the output unit 510 needs to cool the engine's cooling system, the heat conversion three-way valve 540 closes the channel to the heat exchange plate 2 while opening the outlet to the cold conversion three-way valve 550; the outlets of the cold conversion three-way valve 550 leading to the cold exchange plate 1 and the main circuit are both open. When the cooling demand decreases, the flow rate to the main circuit is increased and the flow rate of circulating fluid to the cold exchange plate 1 is decreased on the cold conversion three-way valve 550; when the cooling demand increases, the flow rate to the main circuit is decreased and the flow rate of circulating fluid to the cold exchange plate 1 is increased on the cold conversion three-way valve 550.

[0041] The heat exchange pipeline system, in conjunction with the cold exchange plate 1 and the heat exchange plate 2, heats up and cools the circulating fluid entering the engine cooling system through the output unit 510, effectively improving energy utilization. At the same time, two constant temperature systems, a cold water constant temperature system 3 and a hot water constant temperature system 4, are used to heat up or cool down the cold and hot water conversion system 5, which greatly reduces the heating or cooling time of the circulating fluid in the cold and hot water conversion system 5, saves time, improves the circulation efficiency of the circulating fluid, speeds up the testing process of the thermal shock engine test, and significantly reduces equipment investment costs.

[0042] In a further preferred embodiment of the present invention, the main circuit is provided with an outlet pressure gauge 511, an outlet pressure switch 512, an outlet temperature sensing wire 513, and an outlet ball valve 514 in sequence. The outlet temperature sensing wire 513 and the outlet pressure gauge 511 monitor the temperature and pressure of the circulating liquid in the main circuit in real time. The operator can use this information to understand the condition of the circulating liquid entering the output unit 510, so as to make corresponding control and adjustment to the valves of the heat exchange pipeline system.

[0043] In a further preferred embodiment of the present invention, the internal circulation system includes a conversion system circulation pump 501, an expansion tank 520, and a gas collecting cylinder 530. The gas collecting cylinder 530 is connected to the output unit 510. The inlet of the gas collecting cylinder 530 is equipped with a gas collecting cylinder inlet ball valve 531 and a gas collecting cylinder inlet temperature sensing wire 532. The gas collecting cylinder inlet temperature sensing wire 532 can monitor the temperature of the circulating liquid. The expansion tank 520 is connected to the gas collecting cylinder 530. The expansion tank 520 is equipped with a tank level sensor 521 and a tank level switch 522. The tank level sensor 521, in conjunction with the tank level switch 522, detects the liquid level in the expansion tank 520. The bottom of the expansion tank 520 is connected to the conversion system circulation pump 501 via a pipe. The conversion system circulation pump 501 is connected to the inlet of a heat conversion three-way valve 540 via a pipe.

[0044] In this embodiment, both the expansion tank 520 and the gas collecting cylinder 530 are existing technologies. The gas collecting cylinder 530 collects and processes the gas in the pipeline to prevent excessive gas pressure inside the pipeline from causing pipeline damage. The expansion tank 520 collects and stores the circulating liquid to improve the stability of the equipment during operation.

[0045] In a further preferred embodiment of the present invention, the internal condensation system includes a condenser 320, a compressor 330, an expansion valve 340, a dryer filter 350, and an evaporator 360. The coolant delivered by the internal circulation pump 312 exchanges heat with the condensate from the evaporator 360 and the condensate from the condenser 320. After the heat exchange is completed, the condensate enters the compressor 330 for compression and then returns to the condenser 320. The condenser 320 uses cooling water for condensation.

[0046] In this embodiment, an expansion valve 340 and a dryer filter 350 are also provided on the pipe from the condenser 320 to the evaporator 360. The dryer filter 350 dries the condensate, and the expansion valve 340 improves the internal pressure stability of the equipment and reduces the internal pressure of the pipe.

[0047] In a further preferred embodiment of the present invention, the pipe from the external circulation pump 311 to the cold exchange plate 1 is provided with a cold water temperature sensing wire 313, a cold water three-way proportional valve 314 and a cold water solenoid valve 315, and the pipe from the cold exchange plate 1 to the chilled water tank 301 is connected to the cold water three-way proportional valve 314.

[0048] In this embodiment, the cold water temperature sensing line 313 detects the temperature of the coolant, and the cold water three-way proportional valve 314 directly replenishes the coolant returning from the cold exchange plate 1 into the new coolant entering the cold exchange plate 1. The cooling effect of the new coolant is controlled by adjusting the content of the returning coolant in the new coolant, so as to meet the cooling work of the circulating fluid.

[0049] In a further preferred embodiment of the present invention, the internal heating system includes a water replenishment module, a heater 410, and a hot water constant temperature circulation pump 400. The hot water constant temperature circulation pump 400 is connected to the hot water storage tank 430 through a pipeline. The water replenishment module is installed in the system and includes a hot water check valve 401 to prevent hot water backflow, a water replenishment valve 402 to control the opening of the inlet water flow, a water replenishment pump 403, a water replenishment ball valve 404 to control the water replenishment switch, and a water inlet. The water replenishment pump 403 pumps the water coming in from the water inlet into the pipeline from the hot water storage tank 430 to the hot water constant temperature circulation pump 400. The hot water constant temperature circulation pump 400 sends the hot water from the water replenishment module and the hot water storage tank 430 to the heater 410 for heating, and then sends it to the heat exchange plate 2 through a pipeline.

[0050] In this embodiment, the heat storage tank 430 is equipped with an exhaust hydraulic valve 431, a heat storage tank level switch 432, a heat storage tank pressure gauge 433, and a heat storage tank high-pressure switch 434. The exhaust hydraulic valve 431 is existing technology and ensures the stability of the internal air pressure of the heat storage tank 430. The pipe from the heat exchange plate 2 to the heat storage tank 430 is equipped with a hot water inlet ball valve 435 and a hot water inlet temperature sensor 436. The hot water inlet temperature sensor 436 monitors the temperature of the heat storage liquid, which facilitates the heating and water replenishment control of the heater 410 and the water replenishment module.

[0051] In this embodiment, the heater 410 is equipped with an over-temperature sensor 415 to ensure the normal operation of the heater 410. The pipe from the heater 410 to the heat exchange plate 2 is equipped with a high-pressure safety valve 411, a hot water outlet pressure gauge 412, a hot water outlet temperature gauge 413, and a hot water outlet ball valve 414. The temperature and pressure of the hot liquid flowing to the heat exchange plate 2 are recorded and fed back in real time, so that the operator can adjust the circulating liquid flowing through the heat exchange plate 2 in a timely manner based on this information, so that the circulating liquid reaches the appropriate process conditions.

[0052] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A rapid thermal shock engine testing machine for testing engines, characterized in that, include: A hot and cold water conversion system includes a cold exchange plate, a heat exchange plate, an output unit, and a heat exchange piping system. The circulating fluid in the heat exchange piping system exchanges heat with the cold and heat exchange plates and is then sent to the output unit. The output unit delivers the circulating fluid to the engine's cooling system. The circulating fluid, having completed heat exchange, returns to the heat exchange piping system through the output unit. Both the cold and heat exchange plates are heat exchangers. The cold exchange plate has a circulating fluid inlet I and a circulating fluid outlet I; the heat exchange plate has a circulating fluid inlet II and a circulating fluid outlet II. A cold water constant temperature system is connected to the cooling section of the cold exchange plate to cool the circulating liquid passing through the cold exchange plate. A hot water constant temperature system, wherein the hot water constant temperature system is connected to the heating section of the heat exchange plate, and the circulating liquid passing through the heat exchange plate is heated; The heat exchange piping system includes: A heat conversion three-way valve, wherein the inlet of the heat conversion three-way valve is connected to the internal circulation system, and one outlet of the heat conversion three-way valve is connected to the circulating liquid inlet II; A cold-conversion three-way valve, wherein the inlet of the cold-conversion three-way valve is connected to one outlet of a hot-conversion three-way valve; and one outlet of the cold-conversion three-way valve is connected to circulating fluid inlet I. The main circuit has a cold conversion check valve at the circulating liquid outlet I and a hot conversion check valve at the circulating liquid outlet II. The cold conversion check valve and the hot conversion check valve are connected to the main circuit through pipelines. The other outlet of the cold conversion three-way valve is connected to the main circuit. The main circuit delivers the circulating liquid to the output unit.

2. The rapid thermal shock engine testing machine as described in claim 1, characterized in that, The hot-conversion three-way valve and the cold-conversion three-way valve are three-way proportional valves.

3. The rapid thermal shock engine testing machine as described in claim 2, characterized in that, The main circuit is equipped with an outlet pressure gauge, an outlet pressure switch, an outlet temperature sensing wire, and an outlet ball valve in sequence.

4. The rapid thermal shock engine testing machine as described in claim 3, characterized in that, The hot and cold water conversion system is equipped with an internal circulation system. The internal circulation system sends the circulating liquid recovered in the output unit to the heat exchange pipeline system. The internal circulation system includes a conversion system circulation pump, an expansion tank, and a gas collection cylinder. The gas collection cylinder is connected to the output unit through a pipeline. The expansion tank is connected to the gas collection cylinder. The expansion tank is connected to the conversion system circulation pump through a pipeline. The conversion system circulation pump is connected to the inlet of the heat conversion three-way valve through a pipeline.

5. The rapid thermal shock engine testing machine as described in claim 4, characterized in that, The chilled water constant temperature system includes a chilled water tank, an internal circulation pump, an external circulation pump, and an internal condensation system. The chilled water tank and the internal condensation system are connected through an internal circulation pump pipeline. The internal condensation system includes a condenser, a compressor, and an evaporator. The coolant delivered by the internal circulation pump exchanges heat with the condensate from the evaporator and the condensate from the condenser. After heat exchange, the condensate enters the compressor for compression and then returns to the condenser for re-condensation. The chilled water tank sends coolant to the cold exchange plate through the external circulation pump for heat exchange with the circulating liquid.

6. The rapid thermal shock engine testing machine as described in claim 5, characterized in that, The hot water constant temperature system includes a heater, a hot water constant temperature circulation pump, and a hot water storage tank. One end of the hot water storage tank is connected to a heat exchange plate, and the other end is connected to the hot water constant temperature circulation pump. The hot water constant temperature circulation pump sends the hot water storage liquid in the hot water storage tank to the heater for heating through a pipeline. The hot water storage liquid that has been heated in the heater re-enters the heat exchange plate through a pipeline.

7. The rapid thermal shock engine testing machine as described in claim 6, characterized in that, The internal heating system also includes a water replenishment module, which is connected to the pipeline from the hot liquid storage tank to the hot water constant temperature circulation pump.

8. The rapid thermal shock engine testing machine as described in claim 7, characterized in that, The water replenishment module includes a water replenishment pump and a water inlet. The water replenishment pump pumps the water coming in from the water inlet into the hot liquid storage tank and then into the pipeline of the hot water constant temperature circulation pump.

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