Mixed oil gas generating device and mixed oil gas generating method for simulating waste gas

Abstract

The invention relates to a mixed oil gas generation device and method for simulating waste gas, and the device comprises a gas mixing chamber, a metal particle generator, a piezoelectric micropore atomization mechanism, a paddle, and an oil gas mixing chamber. The gas mixing chamber and / or the metal particle generator are / is communicated with the piezoelectric micropore atomization mechanism, the paddle is arranged below the piezoelectric micropore atomization mechanism, and the paddle is arranged in the oil-gas mixing chamber. During use, mixed gas in the gas mixing chamber is mixed with metal particles input by the metal particle generator, mixed with oil mist with different particle sizes generated by the piezoelectric micropore atomization mechanism through the paddle, fed into the oil-gas mixing chamber through airflow and output, and therefore waste gas with multiple components is simulated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of simulated exhaust gas, in particular to a mixed oil gas generating device and method for simulating exhaust gas. BACKGROUND

[0002] Engine emissions are the core indicators to measure the environmental protection level of the engine. With the continuous improvement of environmental protection requirements, the requirements for engine emissions are also getting higher and higher. The conventional engine emissions are composed of direct exhaust gas formed by fuel circulation and unavoidable crankcase blow-by gas formed by oil circulation.

[0003] The crankcase exhaust gas contains mixed gas produced by incomplete combustion, compound particles produced by combustion, and cooling oil splashed from the crankcase. These oil and gas mixtures need to be separated by an oil and gas separator. The usable oil is recovered and discharged into the atmosphere after meeting the emission requirements.

[0004] Therefore, during the development of the engine, a suitable oil and gas separator must be selected and designed. The commonly used oil and gas separators on the market can be simply classified according to the principle as follows: active type (oil-driven type, electric-driven type), passive type (centrifugal type, labyrinth type), and hybrid type. Different oil and gas separation principles are suitable for different mixed oil and gas states and particle size compositions.

[0005] To achieve efficient and accurate selection or design of an oil and gas separator, it is necessary to simulate the crankcase exhaust gas and test the separation capacity of different oil and gas separators. In the component test environment, a mixed oil and gas generating device is essential. The existing mixed oil and gas generating device lacks authenticity and accuracy in composition simulation.

[0006] Specific disadvantages are: 1) The traditional oil and gas generating device lacks authenticity. The real blow-by gas contains fuel vapor, wear particles, friction pair particles, and other components. However, the conventional oil and gas generating device usually only uses air and oil, lacking other key components, which leads to a large deviation between the test results and the actual situation of the corrosion and coking of the separator material.

[0007] 2) The oil droplet particle size distribution of the conventional oil and gas generating device is difficult to control. The real oil droplet particle size distribution range in the crankcase exhaust gas is wide, while the oil droplet particle size generated by the conventional oil and gas generating device is usually single, affecting the accuracy of the separator test. SUMMARY

[0008] The present application aims to solve at least one of the above technical problems and provides a mixed oil gas generating device and method for simulating exhaust gas.

[0009] The mixed oil-gas generating device for simulating exhaust gas comprises a gas mixing chamber, a metal particle generator, a piezoelectric micro-porous atomizing mechanism, a paddle and an oil-gas mixing chamber, the gas mixing chamber is communicated with the metal particle generator, the gas mixing chamber and / or the metal particle generator is communicated with the piezoelectric micro-porous atomizing mechanism, the paddle is arranged below the piezoelectric micro-porous atomizing mechanism, and the paddle is arranged in the oil-gas mixing chamber.

[0010] In use, the mixed gas in the gas mixing chamber is mixed with the metal particles input by the metal particle generator, and the oil mist of different particle sizes generated by the piezoelectric micro-porous atomizing mechanism is mixed by the paddle, and is sent into the oil-gas mixing chamber by air flow and is output, so that the exhaust gas with multiple components is simulated.

[0011] Preferably, a gas premixing chamber is further included, the gas premixing chamber is communicated with the gas mixing chamber and the metal particle generator, and the other end is communicated with the piezoelectric micro-porous atomizing mechanism.

[0012] Preferably, the piezoelectric micro-porous atomizing mechanism comprises an oil droplet generating chamber, a ceramic pressing sheet and a mesh plate, the ceramic pressing sheet is arranged above the mesh plate, and the opening diameters of the mesh plate can be different. The ceramic pressing sheet and the mesh plate are arranged in the oil droplet generating chamber. The oil droplet generating chamber generates oil droplets, the mesh plate is driven to resonate by high-frequency vibration of the piezoelectric ceramic, so that the oil mist is formed, and different particle sizes of oil droplets can be generated by using mesh plates with different opening diameters.

[0013] Preferably, a plurality of gas tanks and a formula management module are further included, the formula management module records the exhaust gas formula, the formula management module is connected with the plurality of gas tanks, the plurality of gas tanks are communicated with the gas mixing chamber, and the formula management module controls the release amount of the gas in the gas tank into the gas mixing chamber. The formula management module can control the formula, proportion and mixing time of O2, N2, H2O, CO, CO2 and the like in different gas tanks, so that the exhaust gas composition is more realistic.

[0014] Preferably, a first pressure valve and / or a control valve are arranged between the gas tank and the gas mixing chamber, the first pressure valve and / or the control valve are connected with the formula management module, and the formula management module controls the first pressure valve and / or the control valve. The formula management module controls the opening and closing angle of the first pressure valve and the first control valve, and in work, according to the selected crankcase exhaust gas formula proportion, the mixing time and mixing amount of different components are controlled.

[0015] Preferably, a second pressure valve and / or control valve is arranged between the gas mixing chamber and the gas premixing chamber, between the metal particle generator and the gas premixing chamber, and the second pressure valve and / or control valve is connected with the formula management module, and the formula management module controls the second pressure valve and / or control valve.

[0016] Preferably, an oil tank is further included, the oil tank is connected with the oil droplet generating chamber, a third pressure valve and / or control valve is arranged between the oil tank and the oil droplet generating chamber, and the third pressure valve and / or control valve is connected with the formula management module.

[0017] The formula management module can control the opening and closing of all pressure valves and control valves and the opening and closing angle, and in operation, according to the selected crankcase exhaust gas formula proportion, the mixing time and mixing amount of different components are controlled.

[0018] Preferably, the metal particle generator is connected with an electronic control module. The components in different stages simulate the oil gas mixture of the engine in different working conditions and different wear stages.

[0019] The present application forms oil mist of different particle sizes by the piezoelectric micropore atomizing mechanism to control the oil phase composition in the mixed oil gas, fully considers that the crankcase blow-by gas is different from pure air, controls the composition of the gas phase by the electronic control unit and the electromagnetic valve, inputs the gas in multiple different gas tanks (including O2, N2, H2O, CO, CO2, etc.) to the gas mixing chamber and collects the gas to control the gas phase composition in the mixed oil gas, and adds the metal particle generator to put the metal particles into the gas premixing chamber by the electronic control module to control the oil gas mixture of the engine in different working conditions and different wear stages.

[0020] The mixed oil gas generation method using the above mixed oil gas generation device includes the following steps: The metal particles required by the exhaust gas to be simulated are added to the gas premixing chamber by the metal particle adding device; The gas in multiple gas tanks is added to the gas premixing chamber in proportion; The gas in the gas premixing chamber is mixed and carried to the oil droplet generating chamber by the gas flow; The oil droplets of a certain diameter are formed by the piezoelectric micropore atomizing mechanism and are input into the oil gas mixing chamber; The oil, gas and metal particles in the oil gas mixing chamber are mixed by the paddle. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The connection structure of the present application is shown in the schematic diagram. DETAILED DESCRIPTION

[0022] The present invention will be described in conjunction with the accompanying drawings.

[0023] Example 1 like Figure 1 As shown, the simulated exhaust gas mixing oil-gas generation device includes a gas mixing chamber 5, a metal particle generator 1, a piezoelectric microporous atomizing mechanism, a blade 14, and an oil-gas mixing chamber 15. The gas mixing chamber 5 is connected to the metal particle generator 1, and the gas mixing chamber 5 and / or the metal particle generator 1 are connected to the piezoelectric microporous atomizing mechanism. The blade 14 is disposed below the piezoelectric microporous atomizing mechanism and is placed in the oil-gas mixing chamber 15.

[0024] In use, the mixed gas in the gas mixing chamber 5 is mixed with the metal particles introduced by the metal particle generator 1, and mixed with oil mist of different particle sizes generated by the piezoelectric microporous atomizing mechanism by the blades 14. The mixture is then sent into the oil-gas mixing chamber 15 by airflow and output, thereby simulating exhaust gas with multiple components.

[0025] It also includes a gas premixing chamber 7, which is connected to the gas mixing chamber 5 and the metal particle generator 1, and its other end is connected to the piezoelectric microporous atomizing mechanism.

[0026] The piezoelectric microporous atomizing mechanism includes an oil droplet generating chamber 11, a ceramic pressing sheet 12, and a perforated plate 13. The ceramic pressing sheet 12 is disposed above the perforated plate 13, and the perforation diameter of the perforated plate 13 can be different. The ceramic pressing sheet 12 and the perforated plate 13 are placed inside the oil droplet generating chamber 11. The oil droplet generating chamber 11 generates oil droplets, and the high-frequency vibration of the piezoelectric ceramic drives the perforated plate 13 to resonate, thereby forming an oil mist. Using perforated plates 13 with different perforation diameters can produce oil droplets of different sizes.

[0027] It also includes gas tank 2, gas tank 3, and a formula management module 16. The formula management module 16 records the waste gas formula and is connected to gas tank 2 and gas tank 3 respectively. Gas tank 2 and gas tank 3 are connected to the gas mixing chamber 5. The formula management module 16 controls the amount of gas released from gas tank 2 and gas tank 3 into the gas mixing chamber 5. The formula management module 16 can control the formula, ratio, and mixing time of O2, N2, H2O, CO, CO2, etc. in different gas tanks, thereby more realistically simulating the composition of waste gas.

[0028] The first pressure valve and / or control valve 4 is connected with the formula management module 16, and the formula management module 16 controls the first pressure valve and / or control valve. The formula management module 16 controls the opening and closing angle of the first pressure valve and the first control valve 4. In operation, according to the selected crankcase exhaust gas formula proportion, the mixing time and amount of different components are controlled.

[0029] The second pressure valve and / or control valve 8 is arranged between the gas mixing chamber 5 and the gas premixing chamber 7 and between the metal particle generator 1 and the gas premixing chamber 7, and the second pressure valve and / or control valve 8 is connected with the formula management module 16, and the formula management module 16 controls the second pressure valve and / or control valve 8.

[0030] The oil tank 9 is further included, and the oil tank 9 is connected with the oil droplet generating chamber 11. The third pressure valve and / or control valve 10 is arranged between the oil tank 9 and the oil droplet generating chamber 11, and the third pressure valve and / or control valve 10 is connected with the formula management module 16.

[0031] The formula management module 16 can control the opening and closing angle of all pressure valves and control valves. In operation, according to the selected crankcase exhaust gas formula proportion, the mixing time and amount of different components are controlled.

[0032] The metal particle generator 1 is connected with an electronic control module. The components in different stages simulate the oil gas mixture of the engine in different working conditions and different wear stages.

[0033] The present application forms oil mists with different particle sizes by the piezoelectric micropore atomization mechanism of the mechanical-ultrasonic composite atomization device, so as to control the oil phase composition in the mixed oil gas. The present application fully considers that the crankcase blow-by gas is different from pure air, and controls the composition of the gas phase by the electronic control unit and the electromagnetic valve. The gas from multiple different gas tanks (including O2, N2, H2O, CO, CO2, etc.) is input into the gas mixing chamber and collected, so as to control the gas phase composition in the mixed oil gas. The present application adds the metal particle generator. The metal particles are input into the gas premixing chamber by the electronic control module, so as to control the oil gas mixture of the engine in different working conditions and different wear stages.

[0034] Example 2 The mixed oil gas generation method of the mixed oil gas generation device in Example 1 comprises the following steps: (1) The metal particles required by the exhaust gas to be simulated are added to the gas premixing chamber 7 by the metal particle adding device 1. (2) The gases in multiple gas tanks 2 and 3 are added to the gas premixing chamber 7 in proportion. (3) The gas flow is used to mix and carry the gas in the gas premixing chamber 7 to the oil droplet generating chamber 11; (4) The piezoelectric micro-hole atomizing mechanism is used to form oil droplets with certain diameters and lead into the oil-gas mixing chamber 15; (5) The paddle 14 is used to mix the oil, gas and metal particles in the oil-gas mixing chamber 15.

[0035] According to the disclosure and teaching of the above description, those skilled in the art of the present application can also make changes and modifications to the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.

Claims

1. A mixed oil and gas generating device simulating exhaust gas, characterized by, The device comprises a gas mixing chamber, a metal particle generator, a piezoelectric micro-hole atomization mechanism, a paddle and an oil-gas mixing chamber, the gas mixing chamber is in communication with the metal particle generator, the gas mixing chamber and / or the metal particle generator is in communication with the piezoelectric micro-hole atomization mechanism, the paddle is arranged below the piezoelectric micro-hole atomization mechanism, and the paddle is arranged in the oil-gas mixing chamber.

2. The hybrid oil and gas generating device of claim 1, wherein, The device further comprises a gas premixing chamber, which is in communication with the gas mixing chamber and the metal particle generator and in communication with the piezoelectric micro-hole atomization mechanism at the other end.

3. The hybrid gas generator according to claim 1, wherein The piezoelectric micro-hole atomization mechanism comprises an oil droplet generating chamber, a ceramic pressing sheet and a mesh plate, the ceramic pressing sheet is arranged above the mesh plate, and the mesh plate has different diameters of openings.

4. The hybrid gas generator according to claim 3, wherein The device further comprises a plurality of gas tanks and a formula management module, the formula management module records waste gas formulas, the formula management module is connected with the plurality of gas tanks, the plurality of gas tanks are in communication with the gas mixing chamber, and the formula management module controls the release amount of the gas in the gas tanks into the gas mixing chamber.

5. The hybrid gas generator according to claim 4, wherein The first pressure valve and / or control valve is arranged between the gas tank and the gas mixing chamber, the first pressure valve and / or control valve is connected with the formula management module, and the formula management module controls the first pressure valve and / or control valve.

6. The hybrid gas generator according to claim 5, wherein The second pressure valve and / or control valve is arranged between the gas mixing chamber and the gas premixing chamber and between the metal particle generator and the gas premixing chamber, the second pressure valve and / or control valve is connected with the formula management module, and the formula management module controls the second pressure valve and / or control valve.

7. The hybrid gas generator according to claim 6, wherein The device further comprises an oil tank, the oil tank is connected with the oil droplet generating chamber, a third pressure valve and / or control valve is arranged between the oil tank and the oil droplet generating chamber, and the third pressure valve and / or control valve is connected with the formula management module.

8. The hybrid gas generator of claim 1, wherein The metal particle generator is connected with an electronic control module.

9. A method for generating mixed gas using the mixed gas generating apparatus according to any one of claims 2 to 8, characterized by, The device comprises the following steps: (1) adding the metal particles required by the waste gas to be simulated to the gas premixing chamber by using the metal particle adding device; (2) adding the gas in the plurality of gas tanks to the gas premixing chamber in proportion; (3) mixing the gas in the gas premixing chamber by using the gas flow and carrying it to the oil droplet generating chamber; (4) forming oil droplets with a certain diameter by using the piezoelectric micro-hole atomization mechanism and introducing them into the oil-gas mixing chamber; (5) mixing the oil, gas and metal particles in the oil-gas mixing chamber by using the paddle.

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