CN109030002A - A kind of EGR cooling experiment device - Google Patents

A kind of EGR cooling experiment device Download PDF

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Publication number
CN109030002A
CN109030002A CN201810751269.1A CN201810751269A CN109030002A CN 109030002 A CN109030002 A CN 109030002A CN 201810751269 A CN201810751269 A CN 201810751269A CN 109030002 A CN109030002 A CN 109030002A
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China
Prior art keywords
water pipe
water
egr
cooling
transparent
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CN201810751269.1A
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Chinese (zh)
Inventor
黄荣辉
李岩
余光耀
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SAIC GM Wuling Automobile Co Ltd
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SAIC GM Wuling Automobile Co Ltd
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Priority to CN201810751269.1A priority Critical patent/CN109030002A/en
Publication of CN109030002A publication Critical patent/CN109030002A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

A kind of EGR cooling experiment device provided by the invention, using water pump, heat exchanger, first throttle valve, second throttle, first flowmeter, second flowmeter, heater, water tank, water pipe, the first three-dimensional water pipe, the second three-dimensional water pipe, the first transparent water pipe, the second transparent water pipe, sensor, radiator, pressure maintaining valve, the sensor includes pressure sensor and temperature sensor；It further include the structure of high water tank device, the coolant-temperature gage of cooler for recycled exhaust gas, water flow, EGR exhaust temperature cannot accurately be measured by solving test device in the prior art, the technical issues of also wanting the inlet temperature of the convenient cooling water for controlling and flowing through cooler for recycled exhaust gas, realization keeps the adjusting range of cooling water flow bigger, the ability for having the cooler for recycled exhaust gas cooling water temperature of simulation actual vehicle, it can streamflow regime in observation tube in time, whether monitoring cooling water is full of pipeline, the higher technical effect of the accuracy of measurement data.

Description

A kind of EGR cooling experiment device
Technical field
The present invention relates to engine test plant fields, in particular to a kind of EGR cooling experiment device.
Background technique
EGR technology is that the exhaust gas in the exhaust pipe of engine is introduced into inlet manifold, with the fresh air in inlet manifold It enters back into cylinder and burns after mixing.Engine in-cylinder combustion can be inhibited to mitigate pinking by introducing exhaust gas, increased The angle of ignition and reduction pumping loss, finally improve engine fuel economy.The EGR technology of gasoline engine is substantially directly at present Exhaust gas in exhaust pipe is introduced into inlet manifold or remains in portion and participates in burning in cylinder, this mode introduces lacking for exhaust gas It is high to fall into the exhaust gas temperature for being to introduce, engine volumetric efficiency and damage EGR valve can be reduced.
Engine with egr system needs to test the cooling capacity of cooler for recycled exhaust gas, simultaneously in the cooler for recycled exhaust gas type selecting stage It needs accurately to measure cooling water temperature, the cooling water flow, EGR exhaust temperature for passing through cooler for recycled exhaust gas, to instruct cooler for recycled exhaust gas Exploitation.
In the development phase of the engine with EGR, it is desirable to provide a kind of test dress for the cooling capacity for testing cooler for recycled exhaust gas It sets, which needs not only to the cooling water temperature, the cooling water flow, EGR exhaust temperature that accurately measure cooler for recycled exhaust gas, It also wants that convenient the inlet temperature for flowing through the cooling water of cooler for recycled exhaust gas can be controlled simultaneously.
Summary of the invention
The present invention provides a kind of EGR cooling experiment device, using water pump, heat exchanger, first throttle valve, the second throttling It is valve, first flowmeter, second flowmeter, heater, water tank, water pipe, the first three-dimensional water pipe, the second three-dimensional water pipe, first transparent Water pipe, the second transparent water pipe, sensor, radiator, pressure maintaining valve, the water tank connects the water pump by the water pipe, described Water pump, the first throttle valve and the second throttle are separately positioned on one end of the first three-dimensional water pipe, and described second Throttle valve, the first transparent water pipe, the first flowmeter, the heat exchanger, the second transparent water pipe, the pressure stabilizing Valve, the second flowmeter are sequentially connected by the water pipe, the second flowmeter, the second throttle and the heat dissipation Device is separately positioned on described second three-dimensional water pipe one end, and the radiator connects the water tank, the sensing by the water pipe Device includes pressure sensor and temperature sensor, and the pressure sensor at least 2, the temperature sensor at least 4, The sensor is separately positioned on the water pipe, the first transparent water pipe and the second transparent water pipe, the heater Structure in the water tank is set, and coolant-temperature gage, the water of cooler for recycled exhaust gas cannot accurately be measured by solving test device in the prior art The technical issues of flow, EGR exhaust temperature, the inlet temperature for the cooling water for also wanting convenient control to flow through cooler for recycled exhaust gas.
This EGR cooling experiment device that the present invention provides to solve above-mentioned technical problem, including water pump, heat exchange Device, first throttle valve, second throttle, first flowmeter, second flowmeter, heater, water tank, water pipe, the first three-dimensional water pipe, Second three-dimensional water pipe, the first transparent water pipe, the second transparent water pipe, sensor, radiator, pressure maintaining valve, the water tank pass through described Water pipe connects the water pump, and the water pump, the first throttle valve and the second throttle are separately positioned on the described 1st It is the second throttle, the first transparent water pipe, the first flowmeter, the heat exchanger, described to one end of water pipe Second transparent water pipe, the pressure maintaining valve, the second flowmeter are sequentially connected by the water pipe, the second flowmeter, institute It states second throttle and the radiator is separately positioned on described second three-dimensional water pipe one end, the radiator passes through the water pipe Connecting the water tank, the sensor includes pressure sensor and temperature sensor, and the pressure sensor at least 2, institute Temperature sensor at least 4 are stated, the sensor is separately positioned on the water pipe, the first transparent water pipe and described second On transparent water pipe, the heater is arranged in the water tank；It further include high water tank device, the high water tank device is arranged in institute It states inside water tank.
One temperature sensor is set on the first transparent water pipe, and the temperature sensor tilts through described the The outer wall of one transparent water pipe, an inclined pressure measuring tube is arranged on the outer wall of the first transparent water pipe, and the pressure is surveyed Buret one end connection first transparent water pipe, the pressure measuring tube other end setting pressure sensor, described first Transparent water pipe is glass water pipe.
One temperature sensor is set on the second transparent water pipe, and the temperature sensor tilts through described the The outer wall of one transparent water pipe, an inclined pressure measuring tube is arranged on the outer wall of the second transparent water pipe, and the pressure is surveyed Buret one end is connected to the second transparent water pipe, and the pressure sensor is arranged in the pressure measuring tube other end, and second is transparent Water pipe is glass water pipe.
The heater is set on the side wall of bottom in the water tank, the heater is sufficiently submerged in cooling liquid Interior, the first coolant inlet and the first cooling liquid outlet is arranged in the tank top, and first coolant inlet passes through described Water pipe connects the radiator, and first cooling liquid outlet connects the water pump by the water pipe, and the water pipe is worn respectively First coolant inlet and first cooling liquid outlet are crossed until one end is immersed in the coolant liquid, described first is cooling The temperature sensor is provided on the water pipe of liquid outlet.
The pressure maintaining valve setting liquid inlet and liquid outlet, the liquid inlet are arranged in one side bottom of voltage-stablizer There are outside tubular lobes in position, the liquid inlet, and the voltage-stablizer another time upper bit is arranged in the liquid outlet It sets, the liquid outlet has outside tubular lobes, and the liquid inlet connects the radiator, the liquid by the water pipe Body outlet connects the water pump by the water pipe.
The heat exchanger setting EGR flow import, EGR flow outlet, the second cooling liquid inlet, the second coolant liquid go out Mouthful, on the left of the heat exchanger on outer wall, the EGR flow import has outside tubulose convex for EGR flow import setting It rises, the EGR flow outlet is arranged in the heat exchanger outer right wall, and the EGR flow outlet has outside tubulose convex It rises, the left side of the heat exchanger bottom is arranged in second cooling liquid inlet, and second cooling liquid inlet passes through described Water pipe connects the first flowmeter, and second cooling liquid outlet is arranged on the right side of the tank top, and described second is cooling Liquid outlet connects the second transparent water pipe by the water pipe.
The water pump is using variable water pump.
The radiator uses heat-sinking capability adjustable radiator.
The utility model has the advantages that EGR cooling experiment device provided by the invention, makes the adjustment of cooling water flow possessed by of the invention Range is bigger, has the ability of the cooler for recycled exhaust gas cooling water temperature of simulation actual vehicle, can observe in-pipe flow feelings in time Whether condition, monitoring cooling water are full of pipeline, and the accuracy of measurement data is higher.
Detailed description of the invention
Fig. 1 is EGR cooling experiment device general structure schematic diagram of the present invention.
Fig. 2 is the of the present invention first transparent water pipe and the second transparent water pipe structural schematic diagram.
Fig. 3 is pressure maintaining valve structural schematic diagram of the present invention.
Specific embodiment
In conjunction with above-mentioned Detailed description of the invention specific embodiments of the present invention.
As shown in Figure 1, the present invention provides a kind of EGR cooling experiment device, and the cooling experiment dress of the EGR is handed over including water pump 3, heat Parallel operation 9, first throttle valve 4, second throttle 14, first flowmeter 8, second flowmeter 19, heater 18, water tank 1, water pipe 11, the first three-dimensional water pipe 20, the second three-dimensional water pipe 21, the first transparent water pipe 7, the second transparent water pipe 10, sensor 2, radiator 15, pressure maintaining valve 13, the water tank 1 connect the water pump 3, the water pump 3, the first throttle valve 4 and institute by the water pipe One end that second throttle 14 is separately positioned on the first three-dimensional water pipe 20 is stated, the second throttle 14, described first are thoroughly Bright water pipe 7, the first flowmeter 8, the heat exchanger 9, the second transparent water pipe 10, the pressure maintaining valve 13, described Two flowmeters 19 are sequentially connected by the water pipe 11, the second flowmeter 19, the second throttle 14 and the heat dissipation Device 15 is separately positioned on described second three-dimensional water pipe, 14 one end, and the radiator 15 connects the water tank 1 by the water pipe 11, The sensor 2 include pressure sensor 6 and temperature sensor 5, the pressure sensor 6 at least 2, the temperature sensing Device 5 at least 4, the sensor 2 is separately positioned on the water pipe 11, the first transparent water pipe 7 and described second transparent On water pipe 10, the heater 18 is arranged in the water tank 1；It further include high water tank device 17, the high water tank device 17 is set It sets inside the water tank 1.
As shown in Figure 2, a temperature sensor 5, the temperature sensor 6 are set on described first transparent water pipe 7 The outer wall of the described first transparent water pipe 7 is tilted through, the inclined pressure of setting one is surveyed on the outer wall of the first transparent water pipe 7 Buret 12, described 12 one end of pressure measuring tube are connected to the first transparent water pipe 7, and institute is arranged in 12 other end of pressure measuring tube Pressure sensor 6 is stated, the first transparent water pipe 7 is glass water pipe.
As shown in Figure 2, a temperature sensor 5, the temperature sensor 5 are set on described second transparent water pipe 10 The outer wall of the described second transparent water pipe 10 is tilted through, an inclined pressure is set on the outer wall of the second transparent water pipe 10 Measurement pipe 12, described 12 one end of pressure measuring tube are connected to the second transparent water pipe 10, and 10 other end of pressure measuring tube is set The pressure sensor 6 is set, the second transparent water pipe 10 is glass water pipe.
As shown in Figure 1, the heater 18 is set on the side wall of bottom in the water tank 1, the heater 18 fills Sub-dip enters in coolant liquid body, and the first coolant inlet and the first cooling liquid outlet are arranged at the top of the water tank 1, and described first is cooling Liquid entrance connects the radiator 15 by the water pipe 11, and first cooling liquid outlet is connected described by the water pipe 11 Water pump 3, the water pipe 11 is each passed through first coolant inlet and first cooling liquid outlet until institute is immersed in one end It states in coolant liquid, is provided with the temperature sensor on the water pipe of first cooling liquid outlet.
From the figure 3, it may be seen that liquid inlet and liquid outlet is arranged in the pressure maintaining valve 13, the liquid inlet setting is described steady There are outside tubular lobes in 13 side bottom position of pressure valve, the liquid inlet, and the liquid outlet is arranged in the pressure maintaining valve 13 another upper positions, the liquid outlet have outside tubular lobes, and the liquid inlet is connected by the water pipe 11 The radiator is connect, the liquid outlet connects the water pump 3 by the water pipe 11.
As shown in Figure 1, EGR flow import, EGR flow outlet, the second cooling liquid inlet, the is arranged in the heat exchanger 9 Two cooling liquid outlets, the EGR flow import are arranged on the 9 left side outer wall of heat exchanger, and the EGR flow import is oriented Outer tubular lobes, the EGR flow outlet are arranged in 9 outer right wall of heat exchanger, and the EGR flow outlet is oriented Outer tubular lobes, second cooling liquid inlet are arranged in the left side of 9 bottom of heat exchanger, second coolant liquid into Mouth connects the first flowmeter by the water pipe 11, and second cooling liquid outlet is arranged in 1 top right side of water tank, Second cooling liquid outlet connects the described second transparent water pipe 10 by the water pipe 11.
As shown in Figure 1, the water pump 3 is using variable water pump.The radiator 15 uses heat-sinking capability adjustable radiator.
As shown in Figure 2, the high water tank device 18 is arranged inside the water tank 1, and the high water tank device 18 can be in institute It states and is moved freely inside water tank 1, the high water tank device 18 can float on coolant liquid upper surface.
This EGR cooling experiment device provided by the invention is respectively provided with the first flow before and after the heat exchanger 9 Meter 8 and second flowmeter 19, can not only measure the water flow for flowing through the heat exchanger 9, and can mutually compare and It whether there is bubble in Shi Faxian pipeline；The coolant liquid come out from the variable water pump 3 divides two-way, and the first via passes through the heat Exchanger 9 and the first throttle valve 4 enter the radiator 15, and the second tunnel enters after being directly over the second throttle 14 Radiator；It, can be with when the water flow of the required heat exchanger 9 is less than the minimum discharge of the water pump 3 of changeable flow By suitably opening the second throttle 14 on the second tunnel, so that a part of water flows directly into the radiator from the second tunnel 15, to reduce the water flow in the first via, reach the requirement of small flow；The heat-sinking capability of the radiator 15 can be as needed Flexible modulation controls the cooling water temperature come out by the radiator 15 within the temperature range of setting；In the water tank 1 Cooling water can be heated to set temperature by the closed-loop control of the heater 15.
The EGR cooling experiment device under steady state operating conditions can normal regulating cooling water temperature, and can simulate very well whole On vehicle under different operating conditions the practical outlet temperature of engine；The 9 front and back cooling water temperature of heat exchanger is measured through this device With flow and to calculate the heat that heat that cooling water is taken away and the exhaust gas by the heat exchanger 9 are distributed almost the same, This device can meet in bench test to be calculated EGR heat exchange and requires to the cooling requirement of EGR and satisfaction.
This EGR cooling experiment device provided by the invention passes through the variable water pump 3 and the first throttle valve 4 With the 14 two-step evolution flow of second throttle, keep the adjusting range of cooling water flow bigger；It is adjustable using heat-sinking capability The heater 18 of the radiator 15 and water temperature closed-loop control is adjusted the water temperature into cooler for recycled exhaust gas, has simulation The ability of the cooler for recycled exhaust gas cooling water temperature of actual vehicle；It can be with using the first transparent water pipe 7 and the second transparent water pipe 10 Whether streamflow regime in timely observation tube, monitoring cooling water are full of pipeline；Installing fluid flowmeter before and after the heat exchanger 9 can The cooling water flow of 9 front and back of real time contrast's heat exchanger, monitors whether occur the feelings that bubble causes flow measurement inaccurate in pipeline Condition；It installs the first throttle valve 4 and the second throttle 14 additional at two-way cooling water outlet, guarantees that water pipe and EGR are cold But it is full of cooling water in device, improves the accuracy of measurement data.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that Present invention specific implementation is only limited to these instructions, for those of ordinary skill in the art to which the present invention belongs, not Under the premise of being detached from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the protection of invention Range.

Claims (10)

1.一种EGR冷却实验装置，其特征在于：该EGR冷却实验装包括水泵、热交换器、第一节流阀、第二节流阀、第一流量计、第二流量计、加热器、水箱、水管、第一三向水管、第二三向水管、第一透明水管、第二透明水管、传感器、散热器、稳压阀，所述水箱通过所述水管连接所述水泵，所述水泵、所述第一节流阀和所述第二节流阀分别设置在所述第一三向水管的一端，所述第二节流阀、所述第一透明水管、所述第一流量计、所述热交换器、所述第二透明水管、所述稳压阀、所述第二流量计通过所述水管依次连接，所述第二流量计、所述第二节流阀和所述散热器分别设置在所述第二三向水管一端，所述散热器通过所述水管连接所述水箱，所述传感器包括压力传感器和温度传感器，所述压力传感器至少有2个，所述温度传感器至少有4个，所述传感器分别设置在所述水管、所述第一透明水管和所述第二透明水管上，所述加热器设置在所述水箱内。1. A kind of EGR cooling experimental device is characterized in that: this EGR cooling experimental installation comprises water pump, heat exchanger, the first throttle valve, the second throttle valve, the first flow meter, the second flow meter, heater, Water tank, water pipe, first three-way water pipe, second three-way water pipe, first transparent water pipe, second transparent water pipe, sensor, radiator, pressure stabilizing valve, the water tank is connected to the water pump through the water pipe, and the water pump , the first throttling valve and the second throttling valve are respectively arranged at one end of the first three-way water pipe, the second throttling valve, the first transparent water pipe, the first flow meter , the heat exchanger, the second transparent water pipe, the pressure stabilizing valve, and the second flowmeter are sequentially connected through the water pipe, and the second flowmeter, the second throttle valve and the The radiators are respectively arranged at one end of the second three-way water pipes, the radiators are connected to the water tank through the water pipes, the sensors include pressure sensors and temperature sensors, there are at least two pressure sensors, and the temperature sensors There are at least four, the sensors are respectively arranged on the water pipe, the first transparent water pipe and the second transparent water pipe, and the heater is arranged in the water tank. 2.根据权利要求1所述的EGR冷却实验装置，其特征在于：该EGR冷却实验装还包括水箱液位器，所述水箱液位器设置在所述水箱内部。2. The EGR cooling test device according to claim 1, characterized in that: the EGR cooling test device further comprises a water tank liquid level gauge, and the water tank liquid level gauge is arranged inside the water tank. 3.根据权利要求1所述的EGR冷却实验装置，其特征在于：所述第一透明水管上设置一个所述温度传感器，所述温度传感器倾斜穿过所述第一透明水管的外壁，所述第一透明水管的外壁上设置一个倾斜的压力测量管，所述压力测量管一端连通所述第一透明水管，所述压力测量管另一端设置所述压力传感器，所述第一透明水管为玻璃水管。3. The EGR cooling experiment device according to claim 1, characterized in that: said first transparent water pipe is provided with a said temperature sensor, said temperature sensor obliquely passes through the outer wall of said first transparent water pipe, said An inclined pressure measuring tube is arranged on the outer wall of the first transparent water pipe, one end of the pressure measuring tube is connected to the first transparent water pipe, the other end of the pressure measuring tube is provided with the pressure sensor, and the first transparent water pipe is made of glass water pipe. 4.根据权利要求3所述的EGR冷却实验装置，其特征在于：所述第二透明水管上设置一个所述温度传感器，所述温度传感器倾斜穿过所述第一透明水管的外壁，所述第二透明水管的外壁上设置一个倾斜的压力测量管，所述压力测量管一端连通所述第二透明水管，所述压力测量管另一端设置所述压力传感器，第二透明水管为玻璃水管。4. EGR cooling experimental device according to claim 3, characterized in that: said second transparent water pipe is provided with a said temperature sensor, said temperature sensor obliquely passes through the outer wall of said first transparent water pipe, said An inclined pressure measuring tube is arranged on the outer wall of the second transparent water pipe, one end of the pressure measuring tube is connected to the second transparent water pipe, the other end of the pressure measuring tube is provided with the pressure sensor, and the second transparent water pipe is a glass water pipe. 5.根据权利要求2所述的EGR冷却实验装置，其特征在于：所述水箱内靠近底部的侧壁上设置所述加热器，所述加热器充分浸入冷却液体内，所述水箱顶部设置第一冷却液入口和第一冷却液出口，所述第一冷却液入口通过所述水管连接所述散热器，所述第一冷却液出口通过所述水管连接所述水泵，所述水管分别穿过所述第一冷却液入口和所述第一冷却液出口直至一端浸入所述冷却液中，所述第一冷却液出口的水管上设置有所述温度传感器。5. The EGR cooling experiment device according to claim 2, characterized in that: the heater is arranged on the side wall close to the bottom in the water tank, the heater is fully immersed in the cooling liquid, and the top of the water tank is provided with a second A cooling liquid inlet and a first cooling liquid outlet, the first cooling liquid inlet is connected to the radiator through the water pipe, the first cooling liquid outlet is connected to the water pump through the water pipe, and the water pipes respectively pass through The first cooling liquid inlet and the first cooling liquid outlet are immersed in the cooling liquid up to one end, and the temperature sensor is arranged on the water pipe of the first cooling liquid outlet. 6.根据权利要求2所述的EGR冷却实验装置，其特征在于：所述稳压阀设置液体入口和液体出口，所述液体入口设置在所述稳压器一侧底部位置，所述液体入口有向外的管状凸起，所述液体出口设置在所述稳压器另一次的上部位置，所述液体出口有向外的管状凸起，所述液体入口通过所述水管连接所述散热器，所述液体出口通过所述水管连接所述水泵。6. The EGR cooling experiment device according to claim 2, characterized in that: the pressure stabilizing valve is provided with a liquid inlet and a liquid outlet, the liquid inlet is arranged at the bottom position on one side of the pressurizer, and the liquid inlet There is an outward tubular protrusion, the liquid outlet is arranged at another upper position of the voltage stabilizer, the liquid outlet has an outward tubular protrusion, and the liquid inlet is connected to the radiator through the water pipe , the liquid outlet is connected to the water pump through the water pipe. 7.根据权利要求2所述的EGR冷却实验装置，其特征在于：所述热交换器设置EGR气流进口、EGR气流出口、第二冷却液进口、第二冷却液出口，所述EGR气流进口设置在所述热交换机左侧外壁上，所述EGR气流进口有向外的管状凸起，所述EGR气流出口设置在所述热交换机右侧外壁上，所述EGR气流出口有向外的管状凸起，所述第二冷却液进口设置在所述热交换机底部的左侧，所述第二冷却液进口通过所述水管连接所述第一流量计，所述第二冷却液出口设置在所述水箱顶部右侧，所述第二冷却液出口通过所述水管连接所述第二透明水管。7. The EGR cooling experiment device according to claim 2, characterized in that: the heat exchanger is provided with an EGR airflow inlet, an EGR airflow outlet, a second coolant inlet, and a second coolant outlet, and the EGR airflow inlet is provided with On the left outer wall of the heat exchanger, the EGR airflow inlet has an outward tubular protrusion, and the EGR airflow outlet is arranged on the right outer wall of the heat exchanger, and the EGR airflow outlet has an outward tubular protrusion. The second cooling liquid inlet is set on the left side of the bottom of the heat exchanger, the second cooling liquid inlet is connected to the first flow meter through the water pipe, and the second cooling liquid outlet is set on the On the right side of the top of the water tank, the second coolant outlet is connected to the second transparent water pipe through the water pipe. 8.根据权利要求2所述的EGR冷却实验装置，其特征在于：所述水泵采用可变水泵。8. The EGR cooling experiment device according to claim 2, characterized in that: the water pump is a variable water pump. 9.根据权利要求2所述的EGR冷却实验装置，其特征在于：所述散热器采用散热能力可调散热器。9. The EGR cooling experiment device according to claim 2, characterized in that: the radiator adopts a radiator with adjustable heat dissipation capacity. 10.根据权利要求2所述的EGR冷却实验装置，其特征在于：所述水箱液位器设置在所述水箱内部，所述水箱液位器能在所述水箱内部自由移动，所述水箱液位器能浮在冷却液上表面。10. The EGR cooling experiment device according to claim 2, characterized in that: the water tank liquid level gauge is arranged inside the water tank, the water tank liquid level gauge can move freely inside the water tank, and the water tank liquid level gauge The positioner can float on the top surface of the coolant.
CN201810751269.1A 2018-07-10 2018-07-10 A kind of EGR cooling experiment device Pending CN109030002A (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN109655286A (en) * 2019-02-20 2019-04-19 南通盛立德金属材料科技有限公司 Car coolers cooling rate detection device
CN111850560A (en) * 2020-09-07 2020-10-30 杭州制氧机集团股份有限公司 An intelligent intergranular corrosion device

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