A method and related device for controlling the anti-icing of the air outlet chamber of a respirator

Abstract

The present invention provides an anti-icing control method and related device for the outlet chamber of a respirator, and relates to the field of anti-icing. In the present invention, if the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to the default opening, and the heating operation of the outer wall of the outlet chamber is performed in time. Subsequently, based on the wall temperature, the temperature of the gas after the compressor, and the outlet pressure of the crankcase, the corrected opening of the switch solenoid valve is determined, so that the opening of the switch solenoid valve is consistent with the actual situation, thereby improving the accuracy of the control of the switch solenoid valve. In addition, in the present invention, after the opening of the switch solenoid valve is adjusted to the corrected opening, the time for the opening of the switch solenoid valve to continue to be the corrected opening needs to be greater than the preset time period, so as to avoid the problem of frequent switching of the solenoid valve or frequent changes in the opening caused by the instantaneous increase in the wall temperature of the outlet chamber due to the outlet of the outlet chamber.

Description

Technical Field

[0001] The present invention relates to the field of anti-icing, and more particularly to an anti-icing control method for an air outlet chamber of a respirator and a related device. Background Art

[0002] The exhaust gas of the closed breathing system passes through the oil-gas separator from the engine oil pan and enters the compressor end of the engine turbocharger after reaching a certain pressure.

[0003] When the engine is in a cold area, the oil temperature inside the oil pan is basically (80-95)℃, and the temperature of the gas it breathes out is basically the same as the oil temperature. The engine cylinder head cover is generally made of plastic or aluminum, so when the gas inside the engine breather outlet chamber encounters a low-temperature wall, the gas flow rate is very low, which will cause the water in the gas to precipitate and adhere to the low-temperature outlet chamber to form ice. The ice will hinder the release of crankcase pressure and cause engine failure. Summary of the invention

[0004] In view of this, the present invention provides an anti-icing control method and related device for a respirator air outlet chamber to solve the problem of ice forming inside the air outlet chamber when the engine is in a cold area.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An anti-icing control method for a respirator outlet chamber, wherein the input end of a high-pressure gas insulation pipeline is connected to the output end of a supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator outlet chamber; a switch solenoid valve is arranged inside the high-pressure gas insulation pipeline; the high-pressure gas insulation pipeline heats the respirator outlet chamber through the gas generated by the supercharger post-compression pipeline;

[0007] The anti-icing control method comprises:

[0008] Detect the wall temperature of the gas chamber;

[0009] If the wall temperature of the outlet chamber is lower than a preset temperature, detecting the outlet pressure of the crankcase;

[0010] If the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to a default opening; the default opening is greater than zero;

[0011] Determining a corrected opening of the switch solenoid valve based on the wall temperature, the compressor post-gas temperature, and the crankcase outlet pressure;

[0012] The opening of the switch solenoid valve is adjusted to the modified opening; the opening of the switch solenoid valve is maintained at the modified opening for a period of time greater than a preset time period.

[0013] Optionally, detecting the wall temperature of the gas chamber includes:

[0014] Obtaining a temperature value of a temperature sensor located at an engine cylinder head cover;

[0015] The temperature value is taken as the wall temperature of the gas outlet chamber.

[0016] Optionally, determining the corrected opening of the switch solenoid valve based on the wall temperature, the compressor post-gas temperature and the crankcase outlet pressure includes:

[0017] Calculate the gas temperature after the compressor;

[0018] Determining the basic opening of the switch solenoid valve according to the wall temperature and the temperature of the gas after the compressor;

[0019] The basic opening is corrected by using the outlet pressure of the crankcase to obtain a corrected opening of the switch solenoid valve.

[0020] Optionally, the compressor aftergas temperature is calculated, including:

[0021] Detect the engine's intake air flow and supercharger pressure ratio;

[0022] Obtaining the compressor efficiency corresponding to the intake air flow rate and the supercharger pressure ratio;

[0023] The temperature of the gas after the compressor is determined according to the compressor efficiency and the supercharger pressure ratio.

[0024] Optionally, determining the basic opening of the switch solenoid valve according to the wall temperature and the compressor post-gas temperature includes:

[0025] Get the valve opening setting data table MAP table;

[0026] The wall temperature and the compressor post-gas temperature are used as query parameters, and the basic opening of the switch solenoid valve is obtained by querying from the valve opening setting MAP table.

[0027] Optionally, the basic opening is corrected by using the outlet pressure of the crankcase to obtain a corrected opening of the switch solenoid valve, including:

[0028] Determining a correction coefficient corresponding to the outlet pressure of the crankcase;

[0029] The product of the correction coefficient and the basic opening is used as the corrected opening of the switch solenoid valve.

[0030] Optionally, if the wall temperature of the gas outlet chamber is not less than a preset temperature, the method further includes:

[0031] Close the switching solenoid valve.

[0032] An anti-icing control device for a respirator air outlet chamber, wherein the input end of a high-pressure gas insulation pipeline is connected to the output end of a supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator air outlet chamber; a switch solenoid valve is arranged inside the high-pressure gas insulation pipeline; the high-pressure gas insulation pipeline heats the respirator air outlet chamber through the gas generated by the supercharger post-compression pipeline;

[0033] The anti-icing control device comprises:

[0034] A temperature detection module, used to detect the wall temperature of the gas outlet chamber;

[0035] A pressure detection module, used for detecting the outlet pressure of the crankcase if the wall temperature of the outlet chamber is lower than a preset temperature;

[0036] A first opening control module, configured to adjust the opening of the switch solenoid valve to a default opening if the outlet pressure is greater than the outlet pressure limit; the default opening is greater than zero;

[0037] an opening correction module, used for determining a correction opening of the switch solenoid valve based on the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase;

[0038] The second opening control module is used to adjust the opening of the switch solenoid valve to the modified opening; the opening of the switch solenoid valve continues to be the modified opening for a time period greater than a preset time period.

[0039] An electronic device comprises at least one processor and a memory connected to the processor, wherein:

[0040] The memory is used to store computer programs;

[0041] The processor is used to execute the computer program so that the electronic device can implement the above-mentioned anti-icing control method for the respirator outlet chamber.

[0042] A computer storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement the above-mentioned anti-icing control method for the air outlet chamber of a respirator.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The present invention provides an anti-icing control method and related device for a respirator outlet chamber. In the present invention, the input end of a high-pressure gas insulation pipeline is connected to the output end of a supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator outlet chamber. The high-temperature gas generated by the supercharger post-compression pipeline heats the respirator outlet chamber, thereby increasing the temperature of the outer wall of the outlet chamber. Therefore, when the high-temperature gas output from the outlet chamber directly contacts the outer wall of the outlet chamber after the temperature is increased, it will not freeze, thereby ensuring the normal release of the crankcase pressure and allowing the engine to work normally. Further, in the present invention, if the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to the default opening, so as to timely perform the heating operation of the outer wall of the outlet chamber. Subsequently, based on the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase, the corrected opening of the switch solenoid valve is determined, so that the opening of the switch solenoid valve is consistent with the actual situation, thereby improving the accuracy of the switch solenoid valve control. In addition, in the present invention, after the opening of the switch solenoid valve is adjusted to the corrected opening, the time for which the opening of the switch solenoid valve continues to be the corrected opening needs to be greater than a preset time period, so as to avoid the problem of frequent switching of the solenoid valve or frequent changes in the opening caused by the outlet chamber causing the wall temperature of the outlet chamber to increase instantly due to the gas outlet of the outlet chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0046] Figure 1 A schematic diagram of a closed engine breathing system provided by an embodiment of the present invention;

[0047] Figure 2 A three-dimensional diagram of a closed engine breathing system provided by an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of a heating structure provided by the prior art;

[0049] Figure 4 A schematic diagram of the overall structure of an engine closed-circulation breathing system provided by an embodiment of the present invention;

[0050] Figure 5 A partial structural schematic diagram of an engine closed-circulation breathing system provided by an embodiment of the present invention;

[0051] Figure 6A flow chart of an anti-icing control method for a respirator outlet chamber provided by an embodiment of the present invention;

[0052] Figure 7 A flow chart of a method for calculating a corrected opening provided by an embodiment of the present invention;

[0053] Figure 8 A flow chart of another anti-icing control method for a respirator outlet chamber provided by an embodiment of the present invention;

[0054] Fig. 9 A schematic structural diagram of an anti-icing control device for an air outlet chamber of a respirator provided by an embodiment of the present invention;

[0055] Fig.10 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] In order to enable those skilled in the art to more clearly understand the content of the present invention, the professional terms in the present invention are now explained.

[0058] Engine crankcase breather (referred to as breather): During normal engine operation, as the piston continuously reciprocates, a small amount of high-pressure and high-temperature gas will leak from the combustion chamber into the crankcase, causing the crankcase pressure to continue to rise; in addition, as the engine works, the lubricating oil with a cooling effect will also bring part of the heat of the high-temperature parts to the oil pan, causing the temperature in the oil pan to continue to rise. At this temperature, some components in the engine oil evaporate, exacerbating the increase in crankcase pressure. The continuous increase in pressure can cause oil leakage, abnormal engine operation and other faults. The crankcase breather is a one-way valve that ensures that the negative pressure working condition of the crankcase can discharge the exhaust gas.

[0059] Supercharger: A device that uses the inertial force of the engine exhaust to push the impeller to do work, thereby increasing the air pressure after the air filter, burning more fuel and increasing the engine's output power.

[0060] Supercharger compressor (compressor for short): The exhaust gas discharged by the engine drives the turbine impeller to rotate, thereby driving the compressor impeller to rotate. The supercharger compressor impeller forces air to be sucked in from the pipeline after the air filter, and flows out through the increasingly larger channels of the pipeline. The compressed air enters the cylinder to participate in combustion.

[0061] In the context of emission regulations being upgraded, engines need to adopt a closed cycle breather to meet emission regulations. Figure 1 As shown, the three-dimensional diagram is Figure 2 As shown. 101 is the engine cylinder head cover; 102 is the engine breather outlet chamber; 103 is the cylinder head; 104 is the exhaust pipe; 105 is the turbocharger; 106 is the breather outlet pipe (connecting the engine breather outlet chamber and the turbocharger pressure end). Figure 1 and Figure 2 It can be seen that the respirator outlet pipe 106 connects the compressor end of the supercharger 105 and the respirator outlet chamber 102. The exhaust gas of the closed respirator system passes through the oil-gas separator from the engine oil pan and enters the compressor end of the engine turbocharger after reaching a certain pressure.

[0062] When the engine is in a cold area, the oil temperature inside the oil pan is basically (80-95)℃, and the temperature of the gas it breathes out is basically the same as the oil temperature. The engine cylinder head cover is generally made of plastic or aluminum. Therefore, when the gas inside the engine breather outlet chamber encounters a low-temperature wall, the gas flow rate is very low, which will cause the water in the gas to separate out and adhere to the low-temperature outlet chamber to freeze, forming larger ice blocks, blocking the breather outlet. That is, ice will hinder the release of crankcase pressure, causing high crankcase pressure and causing engine failure. In addition, in the early stage of ice formation in the breather outlet chamber, small ice crystals can easily enter the supercharger pressure end through the breather outlet pipe, damaging the supercharger impeller, causing reliability failures and performance fluctuations.

[0063] In the prior art, due to the initial ice formation inside the respirator outlet chamber, small ice crystals will enter the supercharger through the respirator outlet pipe, damaging the supercharger impeller, causing reliability failures and performance fluctuations. Figure 3 Some internal combustion engines will add an electrically controllable heater inside the exhaust pipe to heat and defrost the respirator exhaust gas. However, this method only defrosts the air after it freezes and does not prevent freezing.

[0064] To this end, the present invention provides a solution to the icing of the engine respirator outlet chamber, referring to Figure 4 and Figure 5 A structure of an engine closed cycle breathing system.

[0065] The engine closed-circuit breathing system consists of twelve parts: a supercharger post-pressure pipeline 1, an engine cylinder head cover 2, an engine respirator outlet chamber 3 (referred to as respirator outlet chamber 3), a high-pressure gas insulation pipeline 4, an engine cylinder head cover temperature sensor 5, a switch solenoid valve 6, a heater 7, a respirator outlet pipe 8, a gas pressure and temperature sensor 9, a supercharger pre-pressure pipeline 10, a turbocharger 11, and a high-pressure gas outlet pipe 12. The specific structure of the high-pressure gas insulation pipeline 4 is as follows: Figure 5 shown.

[0066] In one implementation, the gas inside the high-pressure gas insulation pipeline 4 flows from the supercharger pressure rear pipeline 1 around the outer wall of the engine respirator outlet chamber, spirally and multiple times surrounds the respirator outlet chamber, enters the respirator outlet pipe 8, and then merges into the compressor front intake pipeline.

[0067] Specifically, the input end of the high-pressure gas insulation pipeline 4 is connected to the output end of the supercharger post-compression pipeline 1, and the high-pressure gas insulation pipeline 4 is arranged along the outer periphery of the respirator outlet chamber 3. The high-pressure gas insulation pipeline 4 has a heating chamber inside. The high-temperature gas generated by the supercharger post-compression pipeline 1 heats the respirator outlet chamber 3 to increase the temperature of the outer wall of the outlet chamber. Therefore, when the higher-temperature gas output from the outlet chamber directly contacts the outer wall of the outlet chamber with the increased temperature, water in the gas will not precipitate and will not freeze, thereby ensuring the normal release of the crankcase pressure and allowing the engine to work normally.

[0068] The gas that has passed through the compressor of the supercharger and has done work enters the supercharger post-compression pipeline 1, where the gas temperature and pressure are relatively high, the gas temperature is generally above 60°C, the oil temperature of the oil pan is between 80°C and 95°C, and the temperature difference with the oil temperature of the oil pan is small. The high-temperature gas enters the heating chamber of the high-pressure gas insulation pipeline 4 through the high-pressure gas outlet pipe 12, and is transferred to the respirator outlet chamber 3 through the heating chamber, reducing the risk of water precipitation of the gas entering the respirator outlet chamber 3 due to cold, thereby preventing the respirator outlet chamber 3 from freezing.

[0069] In this solution, the high-temperature and high-pressure gas in the supercharger post-compression pipeline 1 is used to heat the wall surface of the respirator outlet chamber 3, and no other heating device is required. This will not only not increase the cost of the device too much, but also the temperature of the gas after the supercharger compressor works will inevitably increase, which can reduce the risk of ice formation in the respirator outlet chamber 3. In addition, the gas pressure after the supercharger compressor works is relatively high, while the supercharger compressor inlet pressure is low, so the system can achieve gas flow without adding any device.

[0070] In addition, since the distance between the respirator outlet chamber 3 and the supercharger is relatively close, the arrangement of the high-pressure gas outlet pipe 12 and the high-pressure gas insulation pipeline 4 is relatively simple and will not increase the difficulty of arranging the device.

[0071] This solution innovatively sets a high-pressure gas insulation pipeline 4 on the respirator outlet chamber 3, which effectively reduces the risk of freezing of the respirator outlet chamber 3 in cold areas.

[0072] Since ice easily forms at one end of the respirator air outlet chamber 3 close to the cylinder head cover, the present invention arranges the inlet of the heating chamber at one end of the heating chamber close to the cylinder head cover, and arranges the outlet of the heating chamber at one end of the heating chamber away from the cylinder head cover, so that the gas with higher temperature acts on the position where ice initially forms in the respirator air outlet chamber 3.

[0073] In the early stage of ice formation in the respirator air outlet chamber 3, small ice crystals can easily enter the compressor end of the supercharger through the respirator air outlet pipe 8 and damage the impeller of the supercharger. In this scheme, the inlet of the heating chamber is arranged near the respirator air outlet chamber 3 and the cylinder head cover, so that the gas with higher temperature acts here, which can effectively prevent ice formation here, thereby reducing the risk of small ice crystals damaging the impeller of the supercharger compressor.

[0074] There are many shapes of heating chambers.

[0075] In some embodiments, Figure 4 and Figure 5 As shown, the heating chamber is a spiral chamber, which is arranged in a spiral shape along the outer wall of the respirator outlet chamber 3 to heat various positions of the respirator outlet chamber 3 in the axial direction and the circumferential direction.

[0076] In other embodiments, the heating chamber is an annular chamber, the inner ring of the annular chamber is consistent with the shape of the outer wall of the respirator outlet chamber 3, and the height of the annular chamber is at most equal to the height of the respirator outlet chamber 3, so as to heat various positions in the axial and circumferential directions of the respirator outlet chamber 3. In order to further optimize the above technical solution, a backflow structure can be set in the annular chamber to optimize the flow field of the gas in the annular chamber.

[0077] In the embodiment where the heating chamber is an annular chamber, the height of the annular chamber may be smaller than the height of the respirator outlet chamber 3 , and in this case, a plurality of annular chambers may be arranged in the height direction of the respirator outlet chamber 3 .

[0078] In some other embodiments, the heating chamber may also be an arc-shaped chamber, the inner arc surface of the arc-shaped chamber is in contact with the outer wall of the respirator outlet chamber 3, the height of the arc-shaped chamber is at most equal to the height of the respirator outlet chamber 3, the arc of the arc-shaped chamber may be 0°-360°, excluding the end value, and optionally, the arc of the arc-shaped chamber is 90°, 120°, 180°. At least two arc-shaped chambers are arranged in the circumference of the respirator outlet chamber 3, and taking the arc of the arc-shaped chamber as 90° as an example, the number of the arc-shaped chambers is at most 4.

[0079] In the embodiment where the heating chamber has a plurality of arc-shaped chambers, the arcs of the plurality of arc-shaped chambers may be equal or unequal.

[0080] In other embodiments, the heating chamber may also be a coil structure arranged along the height direction of the respirator outlet chamber 3. Specifically, the coil structure is reciprocatingly bent along the circumference of the respirator outlet chamber 3 in the height direction of the respirator outlet chamber 3.

[0081] In order to reduce heat loss, the present solution provides a heat-insulating layer on the side of the heating chamber away from the outer wall of the respirator air outlet chamber 3 , so that the heat of the heating chamber can act on the respirator air outlet chamber 3 as much as possible.

[0082] The heat-insulating layer may be arranged inside the cavity of the heating cavity, may be arranged outside the cavity of the heating cavity, or may be arranged inside and outside the cavity of the heating cavity at the same time.

[0083] The heating chamber may be a closed cavity structure. In this case, the heating chamber is independent of the respirator outlet chamber 3. The heat of the high-temperature and high-pressure gas in the heating chamber is transferred to the respirator outlet chamber 3 through the cavity wall of the heating chamber.

[0084] In this embodiment, the heating chamber and the respirator air outlet chamber 3 can be made of the same material, or can be made of a material with high thermal conductivity.

[0085] The heating chamber may also be a cavity with an open end on one side that is in contact with the respirator outlet chamber 3, and the heating chamber is sealed and connected to the respirator outlet chamber 3 through the open end, and the heat of the high-temperature and high-pressure gas in the heating chamber is directly transferred to the respirator outlet chamber 3. In this embodiment, the open end of the heating chamber is sealed by the outer wall of the respirator outlet chamber 3, and the heating chamber and the respirator outlet chamber 3 form an integral structure.

[0086] In this embodiment, the heating chamber and the respirator air outlet chamber 3 can be made of the same material, or can be made of a material with low thermal conductivity.

[0087] In an embodiment where the heating chamber is a spiral heating chamber, the cross-section of the spiral heating chamber can be semicircular or elongated, etc., so as to increase the contact area between the spiral heating chamber and the respirator outlet chamber 3 and improve the heat exchange efficiency between the heating chamber and the respirator outlet chamber 3.

[0088] In an embodiment where the heating chamber is a spiral heating chamber, the cross-sectional area of ​​the spiral heating chamber is less than or equal to the cross-sectional area of ​​the high-pressure gas outlet pipe 12, so as to increase the flow velocity of the gas in the spiral heating chamber, thereby improving the heat exchange efficiency between the heating chamber and the respirator outlet chamber 3.

[0089] The high-temperature and high-pressure gas after heat exchange in the respirator outlet chamber 3 is discharged to the respirator outlet pipe 8 through the high-pressure gas insulation pipeline 4, and then merged into the supercharger.

[0090] In some embodiments, the connection position between the high-pressure gas insulation pipeline 4 and the respirator outlet pipe 8 is close to the end where the respirator outlet pipe 8 is connected to the supercharger, which extends the length of the high-pressure gas insulation pipeline 4, makes the direction of the high-pressure gas insulation pipeline 4 smoother, and reduces the pressure difference between the high-pressure gas insulation pipeline 4 and the compressor end of the supercharger.

[0091] The high-pressure gas outlet pipe 12 is connected to the post-compression pipeline 1 of the supercharger, and the high-pressure gas insulation pipeline 4 is connected to the compressor end of the supercharger. The gas pressure of the high-pressure gas outlet pipe 12 is higher than the gas pressure of the high-pressure gas insulation pipeline 4. This scheme utilizes the pressure difference between the post-compression and pre-compression of the supercharger, as well as the advantage of the higher temperature of the post-compression gas, to ensure that the high-temperature gas heats the respirator outlet chamber 3 while ensuring that the gas can flow continuously and stably in the heating cavity of the high-pressure gas insulation pipeline 4.

[0092] The high-pressure gas outlet pipe 12 and the high-pressure gas heat preservation pipeline 4 can be optionally flexible pipelines and high-temperature resistant pipelines to reduce the difficulty of laying. In addition, they can also be made of hard materials.

[0093] In the engine closed cycle breathing system, the high pressure gas insulation pipeline 4 is connected to the compressor end of the supercharger through the respirator outlet pipe 8. Figure 4 As shown, the high-pressure gas insulation pipeline 4 is arranged on the engine cylinder head cover.

[0094] A heater 7 is provided on the respirator air outlet pipe 8 , and the heater 7 is used to heat the respirator air outlet pipe 8 to prevent ice from forming in the respirator air outlet pipe 8 .

[0095] The engine closed-circulation breathing system disclosed in the present scheme is not only provided with a device on the high-pressure gas insulation pipeline 4 to prevent the respirator outlet chamber from freezing, but also provided with a heater 7 on the respirator outlet pipe 8. The combination of the two can effectively reduce the risk of respirator freezing, ensure that the respirator can work stably and reliably, and ensure that the crankcase always operates within the set pressure range.

[0096] The heater 7 can be an electric heater or a medium heat exchanger. The heater 7 is preferably arranged at one end of the respirator outlet pipe 8 close to the supercharger to prevent small ice crystals from entering the supercharger and damaging the blades of the compressor of the supercharger.

[0097] On the basis of the above-mentioned engine closed cycle breathing system, the engine temperature monitoring is realized by the engine cylinder head cover temperature sensor 5 arranged on the engine cylinder head cover. The freezing operation will be performed only when the temperature is low. Therefore, the present invention can automatically monitor the freezing state through temperature monitoring, so as to start the freezing prevention and ice melting strategy in advance when the temperature is low, thereby ensuring the reliability of the engine, and has the advantages of simple implementation, strong adaptability, low cost, and high feasibility of optimizing the existing models.

[0098] In addition, in the present invention, a switch solenoid valve 6 is added inside the high-pressure gas insulation pipeline 4, and the switch solenoid valve 6 is controlled by the engine ECU (Electronic Control Unit) to realize the opening and closing of the high-pressure gas insulation pipeline 4 and adjust the gas flow rate flowing inside the high-pressure gas insulation pipeline 4. In addition, it can also avoid gas backflow under conditions without icing risk, which affects the engine power performance.

[0099] In addition, the engine closed cycle breathing system of the present invention is also equipped with a gas pressure temperature sensor 9 for detecting the crankcase outlet pressure to monitor whether the crankcase internal pressure is too high. When the pressure is too high, a pressure relief operation is required to protect the safety of the crankcase.

[0100] In an embodiment of the present invention, if the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to the default opening, and the heating operation of the outer wall of the outlet chamber is performed in time. Subsequently, based on the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase, the revised opening of the switch solenoid valve is determined, so that the opening of the switch solenoid valve is consistent with the actual situation, thereby improving the accuracy of the control of the switch solenoid valve. In addition, in the present invention, after the opening of the switch solenoid valve is adjusted to the revised opening, the time for the opening of the switch solenoid valve to continue to be the revised opening needs to be greater than the preset time period, so as to avoid the problem of frequent switching of the solenoid valve or frequent changes in the opening caused by the instantaneous increase in the wall temperature of the outlet chamber due to the outlet of the outlet chamber.

[0101] Based on the above content, an embodiment of the present invention provides an anti-icing control method for a respirator outlet chamber, and the execution subject can be the above-mentioned ECU, and can also be other controllers. The ECU can adjust the opening of the switch solenoid valve according to the wall temperature, the temperature of the gas after the compressor, and the outlet pressure of the crankcase to match the current temperature and crankcase pressure, so as to accurately heat the respirator outlet chamber.

[0102] Specifically, refer to Figure 6 , a method for controlling the anti-icing of a respirator outlet chamber may include:

[0103] S11. Detect the wall temperature of the gas chamber.

[0104] The air outlet chamber is located in the breathing chamber of the engine. Since the present invention needs to prevent the air outlet chamber of the respirator from freezing, and the air outlet chamber will freeze in a low temperature environment, it is necessary to detect the wall temperature of the air outlet chamber to determine whether the air outlet chamber has the risk of freezing in the current environment.

[0105] In a low temperature environment, the gas temperature inside the gas outlet chamber is high, while the temperature of the wall surface of the gas outlet chamber is low, and the gas will contact the wall surface, causing the temperature of both the wall surface and the gas to change. Therefore, setting a temperature sensor on the gas outlet chamber cannot accurately detect the current wall surface temperature.

[0106] To this end, the embodiment of the present invention uses the data detected by the engine cylinder head cover temperature sensor as the wall temperature of the outlet chamber, that is, obtains the temperature value of the temperature sensor located at the engine cylinder head cover, and uses the temperature value as the wall temperature of the outlet chamber.

[0107] The value detected by the engine cylinder head cover temperature sensor is used as the wall temperature of the outlet chamber because the engine cylinder head cover is close to the outlet chamber and their temperatures are similar. Therefore, the value detected by the engine cylinder head cover temperature sensor can be used as the wall temperature of the outlet chamber.

[0108] It should be noted that, in this embodiment, the ambient temperature is not used as the wall temperature of the air outlet chamber. This is because the air outlet chamber is arranged near the engine and is affected by the exhaust gas when the engine is running, as well as the air outlet chamber being arranged in the cabin. The temperature of the air outlet chamber is different from the actual ambient temperature. Therefore, in this embodiment, the temperature at the engine cylinder head cover is used as the wall temperature of the air outlet chamber.

[0109] In this embodiment, the temperature at the engine cylinder head cover is used to accurately measure the wall temperature of the engine breather outlet chamber, rather than directly replacing it with the ambient temperature. Taking into account the influence of the interior of the vehicle where the engine is located and the engine, the risk of freezing in the breather outlet chamber can be judged more accurately, which is conducive to early prevention and accurate judgment of icing conditions.

[0110] S12: If the wall temperature of the outlet chamber is lower than a preset temperature, the outlet pressure of the crankcase is detected.

[0111] Specifically, the preset temperature can be set according to actual conditions, such as 5°C. If the wall temperature of the outlet chamber is less than 5°C, it means that the temperature near the outlet chamber is low. When the gas inside the outlet chamber of the engine respirator encounters the wall with low temperature, the gas flow rate is very low, which will cause water in the gas to precipitate, and then freeze when the temperature is lower.

[0112] Therefore, when the wall temperature of the air outlet chamber is less than 5°C, anti-icing operation is required.

[0113] If the wall temperature of the air outlet chamber is not less than the preset temperature, that is, the wall temperature of the air outlet chamber is not less than 5° C., the risk of icing is low, and the ECU can control the switch solenoid valve to close.

[0114] Specifically, since ice formation will affect the crankcase release pressure, the crankcase outlet pressure needs to be considered when performing anti-icing operations. In practical applications, the crankcase outlet pressure is detected by the above-mentioned gas pressure and temperature sensor to monitor whether the crankcase internal pressure is too high.

[0115] Among them, the gas pressure and temperature sensor is arranged between the respirator outlet pipeline and the turbocharger pressure end front intake pipeline, which is used to detect the temperature to execute the subsequent steps.

[0116] S13. If the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to a default opening; the default opening is greater than zero.

[0117] Among them, the outlet pressure limit can be 0.8 bar.

[0118] If the outlet pressure is greater than the outlet pressure limit, it means that the current internal pressure of the crankcase is too high and a pressure relief operation is urgently needed. The gas released from the crankcase will leak into the supercharger through the outlet chamber. Since the wall temperature of the outlet chamber is relatively low, there is a risk of freezing. At this time, it is necessary to use the high-temperature, high-pressure gas generated by the supercharger post-compression pipeline to heat the respirator outlet chamber. Since the high-temperature gas is output through the high-pressure gas insulation pipeline 4, and the high-pressure gas insulation pipeline 4 surrounds the outer wall of the outlet chamber with multiple spiral turns, the high-temperature gas can heat the outer wall of the outlet chamber and increase the temperature of the outer wall of the outlet chamber. Therefore, when the higher-temperature gas output from the outlet chamber directly contacts the outer wall of the outlet chamber after the temperature is increased, water will not be precipitated and then frozen, which ensures the normal release of the crankcase pressure and allows the engine to work normally.

[0119] More specifically, the embodiment of the present invention takes advantage of the pressure difference between the gas before and after compression by the supercharger and the higher temperature of the gas after compression, and sets a high-pressure gas insulation pipeline outside the respirator outlet chamber, thereby avoiding problems such as water precipitation caused by the respirator outlet encountering a low-temperature wall surface, which in turn causes freezing.

[0120] A switch solenoid valve is provided inside the high-pressure gas insulation pipeline. The switch solenoid valve is used to control the flow of high-temperature gas to avoid gas backflow, thereby ensuring that the power performance of the engine is not affected.

[0121] The switch solenoid valve also has the function of regulating the flow of high-temperature gas in the high-pressure gas insulation pipeline. If it is detected that the internal pressure of the crankcase is too high, that is, the outlet pressure is greater than the outlet pressure limit, the crankcase needs to be depressurized as soon as possible. In order to achieve anti-icing operation when the crankcase is depressurized, in this embodiment, the opening of the switch solenoid valve is adjusted to a default opening, wherein the default opening is greater than zero, such as 20%. In this embodiment, the default opening is a reasonable opening value set after a large number of experimental studies to depressurize the crankcase as soon as possible. This opening value enables high-temperature gas to flow in the high-pressure gas insulation pipeline, thereby heating the outer wall of the outlet chamber to avoid icing.

[0122] In this embodiment, since the fixed opening of the switch solenoid valve is adjusted directly, the calculation process of the opening value of the switch solenoid valve is omitted. Therefore, the solenoid valve can be opened as soon as possible and the crankcase pressure relief operation can be performed as soon as possible.

[0123] When the crankcase is depressurized, the depressurized gas will flow out through the air outlet chamber. In the present invention, the opening of the switch solenoid valve is set at 20%, and the high-temperature gas will provide a heat preservation function, thereby achieving anti-icing.

[0124] S14. Determine a corrected opening of the switch solenoid valve based on the wall temperature, the compressor post-gas temperature, and the crankcase outlet pressure.

[0125] After the switch solenoid valve is quickly adjusted in step S13, high-temperature gas is already provided to provide heat preservation for the gas outlet chamber to prevent ice. Therefore, on this basis, the opening of the switch solenoid valve can be accurately adjusted to match the opening of the switch solenoid valve with the actual situation, thereby ensuring the control accuracy of the switch solenoid valve.

[0126] In this embodiment, when accurately adjusting the switch solenoid valve, three parameters, namely, the wall temperature, the temperature of the gas after the compressor, and the outlet pressure of the crankcase, are taken into consideration.

[0127] The wall temperature is taken into consideration because the wall temperature is low and the freezing speed is fast, so the flow of high-temperature gas needs to be accelerated. The wall temperature is high and the freezing speed is slow, which can reduce the flow of high-temperature gas.

[0128] In addition, when using the switch solenoid valve to adjust the flow rate, the influence of the temperature of the gas after the compressor on the opening of the switch solenoid valve is considered. Specifically, in the engine operating condition, when the temperature of the gas after the compressor is high, the opening of the switch solenoid valve can be appropriately reduced, which can achieve the effect of heat preservation and improve the engine operating performance. When the temperature of the gas after the compressor is low, the opening of the switch solenoid valve can be appropriately increased to meet the requirement of reducing the risk of icing.

[0129] In addition, the present invention takes the outlet pressure of the crankcase into consideration. When the outlet pressure of the crankcase is high, the amount of depressurized gas is large, the required flow rate of high-temperature gas is large, and the opening of the switch solenoid valve needs to be larger. When the outlet pressure of the crankcase is low, the amount of depressurized gas is small, the required flow rate of high-temperature gas is small, and the opening of the switch solenoid valve needs to be smaller.

[0130] After determining the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase, these three data are used to determine the corrected opening of the switch solenoid valve, which is the theoretical opening of the switch solenoid valve under the current working condition.

[0131] S15, adjusting the opening of the switch solenoid valve to the corrected opening.

[0132] Specifically, the ECU sends an adjustment instruction to the switch solenoid valve, so that the switch solenoid valve adjusts its own opening to the corrected opening.

[0133] As can be seen from the above, the present invention adopts a two-step adjustment method when adjusting the opening. The first step is to perform fixed adjustment to provide high-temperature gas to the outlet chamber as soon as possible when the crankcase is rapidly depressurized. The second step is to correct the opening of the switch solenoid valve according to the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase during the process of providing high-temperature gas, so that the opening matches the actual working condition.

[0134] It should be noted that after the switch solenoid valve is opened, the high-temperature gas generated by the supercharger post-compression pipeline will be output to the high-pressure gas insulation pipeline, causing the temperature of the outlet chamber wall to rise instantly, and the temperature of the surrounding area will also rise. There may be a situation where the temperature value of the temperature sensor at the engine cylinder head cover is greater than the preset temperature, causing the switch solenoid valve to close. After the switch solenoid valve is closed, the high-temperature gas stops being input into the high-pressure gas insulation pipeline, causing the temperature of the outlet chamber wall to drop instantly, and the temperature of the surrounding area will also drop, causing the temperature value of the temperature sensor at the engine cylinder head cover to be less than the preset temperature, and the switch solenoid valve needs to be opened again, that is, there is a problem of repeated closing and opening of the can opener solenoid valve.

[0135] In order to solve this problem, in the implementation of the present invention, the opening of the switch solenoid valve continues to be the corrected opening for a time greater than a preset time period. That is, after the opening of the switch solenoid valve is adjusted to the corrected opening, the opening of the switch solenoid valve is no longer adjusted within the preset time period, so that the opening of the switch solenoid valve continues to be the corrected opening. In the specific implementation, considering that the electromagnetic switch valve will affect the temperature of the cylinder head cover, causing the closed-loop control to fluctuate, a delay signal is added to implement the above-mentioned solution that the opening of the switch solenoid valve continues to be the corrected opening for a time greater than the preset time period, avoiding the problem of repeated closing and opening of the development valve, and improving the control accuracy.

[0136] After the high-temperature gas heats the wall of the air outlet chamber for a preset period of time, the temperature of the air outlet chamber is kept constant. At this time, the temperature value of the temperature sensor at the engine cylinder head cover can be re-detected to determine whether it is less than the preset temperature and continue to execute subsequent steps.

[0137] In this embodiment, the input end of the high-pressure gas insulation pipeline is connected to the output end of the supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator outlet chamber, and the high-temperature gas generated by the supercharger post-compression pipeline heats the respirator outlet chamber, thereby increasing the temperature of the outer wall of the outlet chamber, so that when the high-temperature gas output from the outlet chamber directly contacts the outer wall of the outlet chamber after the temperature is increased, it will not freeze, thereby ensuring the normal release of the crankcase pressure and allowing the engine to operate normally. Further, in the present invention, if the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to the default opening, and the heating operation of the outer wall of the outlet chamber is performed in time. Subsequently, based on the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase, the corrected opening of the switch solenoid valve is determined, so that the opening of the switch solenoid valve is consistent with the actual situation, thereby improving the accuracy of the switch solenoid valve control. In addition, in the present invention, after the opening of the switch solenoid valve is adjusted to the corrected opening, the time for which the opening of the switch solenoid valve continues to be the corrected opening needs to be greater than a preset time period, so as to avoid the problem of frequent switching of the solenoid valve or frequent changes in the opening caused by the outlet chamber causing the wall temperature of the outlet chamber to increase instantly due to the gas outlet of the outlet chamber.

[0138] The above embodiment mentions that it is necessary to calculate the corrected opening. In another implementation of the present invention, a specific implementation of "determining the corrected opening of the switch solenoid valve based on the wall temperature, the compressor after-gas temperature and the crankcase outlet pressure" is provided. Figure 7 , which may include:

[0139] S21. Calculate the gas temperature after the compressor.

[0140] In this embodiment, the temperature of the gas after the compressor is related to the intake air flow rate and the supercharger pressure ratio, so the temperature of the gas after the compressor can be calculated based on the intake air flow rate and the supercharger pressure ratio.

[0141] Specifically, the steps are as follows:

[0142] 1) Detect the engine's intake air flow and supercharger pressure ratio.

[0143] Specifically, the engine intake air flow rate (AirCtl_dmCmprPres) is measured by the engine intake air flow sensor, and the supercharger pressure ratio (AirCtl_facCmprPres) is read by the ECU.

[0144] 2) Obtaining the compressor efficiency corresponding to the intake air flow rate and the supercharger pressure ratio.

[0145] Specifically, the compressor efficiency MAP of the supercharger is configured with the corresponding relationship between the intake flow rate, the supercharger pressure ratio and the compressor efficiency. Therefore, the compressor efficiency MAP can be used to query the compressor efficiency corresponding to the intake flow rate and the supercharger pressure ratio. The compressor efficiency refers to the working efficiency of the compressor.

[0146] 3) Determine the temperature of the gas after the compressor according to the compressor efficiency and the supercharger pressure ratio.

[0147] Specifically, in the implementation of the present invention, the formula for calculating the temperature of the gas after the compressor by using the compressor efficiency and the pressure ratio of the supercharger is as follows:

[0148]

[0149] in, is the adiabatic index of air. Generally speaking, =1.4. is the supercharger pressure ratio, is the compressor efficiency, is the compressor inlet temperature, which can be detected. is the gas temperature after the compressor.

[0150] because , Known, will and Substituting into the formula, the gas temperature after the compressor can be calculated .

[0151] In addition to the above formula, the gas temperature after the compressor can be calculated In addition, the relationship between the compressor efficiency, the supercharger pressure ratio and the compressor after-gas temperature can be constructed as a compressor after-temperature MAP, and the compressor after-gas temperature can be directly obtained by querying the compressor after-temperature MAP. .

[0152] S22. Determine the basic opening of the switch solenoid valve according to the wall temperature and the temperature of the gas after the compressor.

[0153] Specifically, the wall temperature is the temperature at the engine cylinder head cover. In specific implementation, the valve opening setting MAP can be obtained, and the wall temperature and the compressor post-gas temperature are used as query parameters. The basic opening of the switch solenoid valve is queried from the valve opening setting MAP table.

[0154] In addition, the large model can also be used to process the wall temperature and the temperature of the gas after the compressor to obtain the basic opening of the corresponding switch solenoid valve.

[0155] S23, using the outlet pressure of the crankcase to correct the basic opening to obtain a corrected opening of the switch solenoid valve.

[0156] Specifically, when the crankcase outlet pressure is high, the amount of depressurized gas is large, the required high-temperature gas flow rate is greater, and the opening of the switch solenoid valve needs to be larger. When the crankcase outlet pressure is small, the amount of depressurized gas is small, the required high-temperature gas flow rate is smaller, and the opening of the switch solenoid valve needs to be smaller.

[0157] Therefore, the basic opening can be corrected based on the outlet pressure of the crankcase to obtain the corrected opening of the switch solenoid valve. The specific implementation steps are as follows:

[0158] a. Determine the correction coefficient corresponding to the outlet pressure of the crankcase.

[0159] Specifically, the outlet pressure of the crankcase is detected by using the gas pressure and temperature sensor, and the outlet pressure of the crankcase is used to query the opening correction coefficient (opening correction CUR) based on the pressure to obtain the correction coefficient.

[0160] In this embodiment, for the sake of convenience, an opening correction coefficient table is used for implementation. In addition, a large model can be used to predict the correction coefficient.

[0161] b. The product of the correction coefficient and the basic opening is used as the corrected opening of the switch solenoid valve.

[0162] Specifically, the corrected opening = correction coefficient × basic opening.

[0163] In this embodiment, when determining the corrected opening, the basic opening is corrected using the crankcase outlet pressure, so that the obtained opening of the switch solenoid valve better meets the actual needs of the crankcase, thereby improving the accuracy of determining the corrected opening.

[0164] In order to enable those skilled in the art to understand the present invention more clearly. Figure 8 Provide an overall description of the program.

[0165] The wall temperature of the engine respirator outlet chamber is measured by the engine cylinder head cover temperature sensor (the measured value is T1). When the measured temperature is greater than the temperature threshold (for example, 5°C, this value can be marked), switch 1 is in the default state, and the final required valve opening takes the default value of 0. At this time, the valve is in the closed state.

[0166] When the temperature measured by the engine cylinder head cover temperature sensor is lower than the temperature threshold (such as Figure 8 When the ambient temperature threshold in the engine is reached (specifically, the preset temperature mentioned above), switch 1 is opened, and the final required valve opening depends on the output value of switch 2. At this time, it is necessary to determine whether the crankcase outlet pressure is greater than the crankcase outlet pressure limit of 0.8 bar. When the crankcase outlet pressure is greater than the crankcase outlet pressure limit, switch 2 is in the default state, and the final required opening of the switch solenoid valve takes the default value of 20%. The final corrected opening of the switch solenoid valve needs to be determined based on the temperature measured by the engine cylinder head cover temperature sensor, the compressor rear gas temperature, and the crankcase outlet pressure.

[0167] Specifically, the intake air flow rate is measured by the engine intake air flow sensor, and the supercharger pressure ratio is read by the ECU. The two can be queried in the compressor efficiency MAP to obtain the compressor efficiency.

[0168] Based on the compressor efficiency and the supercharger pressure ratio value, the gas temperature after the compressor can be calculated.

[0169] Based on the engine cylinder head cover temperature T1 and the compressor after-gas temperature, the valve opening setting MAP is found to obtain the basic opening of the switch solenoid valve.

[0170] Based on the crankcase outlet pressure (measured by the gas pressure and temperature sensor), the pressure-based opening correction CUR is found to obtain the correction factor.

[0171] The basic opening is corrected by the correction coefficient to obtain the final required opening of the switch solenoid valve, that is, the above-mentioned corrected opening.

[0172] Considering that the increase in gas temperature after compression will affect the temperature of the cylinder head cover to a certain extent, a delay signal is added to the valve opening signal. After the opening of the switch solenoid valve is adjusted to the corrected opening, the switch solenoid valve is controlled next time after a certain delay (for example, 10s, this value can be marked) to avoid performance fluctuations caused by frequent switching of the switch valve.

[0173] It can be seen from the above that, through the above anti-icing control steps in the present invention, the risk of icing in the air outlet chamber is low. In addition, after the modification process, the control accuracy of the switch solenoid valve is high.

[0174] Based on the above-mentioned embodiment of the anti-icing control method, another embodiment of the present invention provides an anti-icing control device for a respirator outlet chamber, wherein the input end of the high-pressure gas insulation pipeline is connected to the output end of the supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator outlet chamber; a switch solenoid valve is arranged inside the high-pressure gas insulation pipeline; the high-pressure gas insulation pipeline heats the respirator outlet chamber through the high-temperature gas generated by the supercharger post-compression pipeline;

[0175] Reference Fig. 9The anti-icing control device comprises:

[0176] The temperature detection module 201 is used to detect the wall temperature of the gas outlet chamber;

[0177] The pressure detection module 202 is used to detect the outlet pressure of the crankcase if the wall temperature of the outlet chamber is lower than a preset temperature;

[0178] The first opening control module 203 is used to adjust the opening of the switch solenoid valve to a default opening if the outlet pressure is greater than the outlet pressure limit; the default opening is greater than zero;

[0179] An opening correction module 204, configured to determine a correction opening of the switch solenoid valve based on the wall temperature, the compressor aftergas temperature and the crankcase outlet pressure;

[0180] The second opening control module 205 is used to adjust the opening of the switch solenoid valve to the modified opening; the opening of the switch solenoid valve continues to be the modified opening for a time greater than a preset time period.

[0181] In an optional implementation, the temperature detection module 201 is specifically used for:

[0182] The temperature value of the temperature sensor located at the engine cylinder head cover is obtained, and the temperature value is used as the wall temperature of the air outlet chamber.

[0183] In an optional implementation, the opening correction module 204 includes:

[0184] The temperature calculation submodule is used to calculate the temperature of the gas after the compressor;

[0185] An opening determination submodule, used for determining a basic opening of the switch solenoid valve according to the wall temperature and the temperature of the gas after the compressor;

[0186] The opening correction submodule is used to correct the basic opening by using the outlet pressure of the crankcase to obtain the corrected opening of the switch solenoid valve.

[0187] In an optional implementation, the temperature calculation submodule is specifically used for:

[0188] The intake flow rate and the supercharger pressure ratio of the engine are detected, the compressor efficiency corresponding to the intake flow rate and the supercharger pressure ratio is obtained, and the temperature of the gas after the compressor is determined according to the compressor efficiency and the supercharger pressure ratio.

[0189] In an optional implementation, the opening determination submodule is specifically used for:

[0190] The valve opening setting data table MAP table is obtained, and the wall temperature and the compressor after-gas temperature are used as query parameters, and the basic opening of the switch solenoid valve is queried from the valve opening setting MAP table.

[0191] In an optional implementation, the opening correction submodule is specifically used for:

[0192] A correction coefficient corresponding to the outlet pressure of the crankcase is determined, and the product of the correction coefficient and the basic opening is used as the corrected opening of the switch solenoid valve.

[0193] In an optional implementation, the first opening control module 203 is further used for:

[0194] If the wall temperature of the gas outlet chamber is not less than the preset temperature, the switch solenoid valve is closed.

[0195] In this embodiment, the input end of the high-pressure gas insulation pipeline is connected to the output end of the supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator outlet chamber, and the high-temperature gas generated by the supercharger post-compression pipeline heats the respirator outlet chamber, thereby increasing the temperature of the outer wall of the outlet chamber, so that when the high-temperature gas output from the outlet chamber directly contacts the outer wall of the outlet chamber after the temperature is increased, it will not freeze, thereby ensuring the normal release of the crankcase pressure and allowing the engine to operate normally. Further, in the present invention, if the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to the default opening, and the heating operation of the outer wall of the outlet chamber is performed in time. Subsequently, based on the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase, the corrected opening of the switch solenoid valve is determined, so that the opening of the switch solenoid valve is consistent with the actual situation, thereby improving the accuracy of the switch solenoid valve control. In addition, in the present invention, after the opening of the switch solenoid valve is adjusted to the corrected opening, the time for which the opening of the switch solenoid valve continues to be the corrected opening needs to be greater than a preset time period, so as to avoid the problem of frequent switching of the solenoid valve or frequent adjustment of the opening due to the instantaneous increase in the wall temperature of the outlet chamber caused by the gas outlet of the outlet chamber.

[0196] It should be noted that, for the working process of each module and each sub-module in this embodiment, please refer to the corresponding description in the above embodiment, which will not be repeated here.

[0197] The present application also provides an electronic device in an embodiment. Fig.10 As shown, it shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiment of the present application. The electronic device in the embodiment of the present application may include but is not limited to fixed terminals such as mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Fig.10The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0198] like Fig.10 As shown, the electronic device may include a processing device (such as a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 to a random access memory (RAM) 603 to implement the above-mentioned anti-icing control method for the respirator outlet chamber. When the electronic device is powered on, various programs and data required for the operation of the electronic device are also stored in the RAM 603. The processing device 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0199] Typically, the following devices may be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a memory card, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Fig.10 An electronic device having various devices is shown, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0200] An embodiment of the present application also provides a computer program product including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any of the anti-icing control methods for the air outlet chamber of a respirator provided in the embodiments of the present application.

[0201] A computer-readable storage medium is also provided in an embodiment of the present application. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any anti-icing control method for the air outlet chamber of a respirator provided in an embodiment of the present application.

[0202] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the anti-icing of a respirator outlet chamber, characterized in that: The input end of the high-pressure gas insulation pipeline is connected to the output end of the supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator outlet chamber; a switch solenoid valve is arranged inside the high-pressure gas insulation pipeline; the high-pressure gas insulation pipeline heats the respirator outlet chamber through the gas generated by the supercharger post-compression pipeline; The anti-icing control method comprises: Detect the wall temperature of the gas chamber; If the wall temperature of the outlet chamber is lower than a preset temperature, detecting the outlet pressure of the crankcase; If the outlet pressure is greater than the outlet pressure limit, the opening of the switch solenoid valve is adjusted to a default opening; the default opening is greater than zero; Determining a corrected opening of the switch solenoid valve based on the wall temperature, the compressor post-gas temperature, and the crankcase outlet pressure; The opening of the switch solenoid valve is adjusted to the modified opening; the opening of the switch solenoid valve is maintained at the modified opening for a period of time greater than a preset time period.

2. The anti-icing control method according to claim 1, characterized in that: Detect the wall temperature of the gas chamber, including: Obtaining a temperature value of a temperature sensor located at an engine cylinder head cover; The temperature value is taken as the wall temperature of the gas outlet chamber.

3. The anti-icing control method according to claim 1, characterized in that: Determining the corrected opening of the switch solenoid valve based on the wall temperature, the compressor post-gas temperature, and the crankcase outlet pressure includes: Calculate the gas temperature after the compressor; Determining the basic opening of the switch solenoid valve according to the wall temperature and the temperature of the gas after the compressor; The basic opening is corrected by using the outlet pressure of the crankcase to obtain a corrected opening of the switch solenoid valve.

4. The anti-icing control method according to claim 3, characterized in that: Calculate the gas temperature after the compressor, including: Detect the engine's intake air flow and supercharger pressure ratio; Obtaining the compressor efficiency corresponding to the intake air flow rate and the supercharger pressure ratio; The temperature of the gas after the compressor is determined according to the compressor efficiency and the supercharger pressure ratio.

5. The anti-icing control method according to claim 3, characterized in that: Determining the basic opening of the switch solenoid valve according to the wall temperature and the compressor after-gas temperature includes: Get the valve opening setting data table MAP table; The wall temperature and the compressor post-gas temperature are used as query parameters, and the basic opening of the switch solenoid valve is obtained by querying from the valve opening setting MAP table.

6. The anti-icing control method according to claim 3, characterized in that: The basic opening is corrected by using the outlet pressure of the crankcase to obtain the corrected opening of the switch solenoid valve, including: Determining a correction coefficient corresponding to the outlet pressure of the crankcase; The product of the correction coefficient and the basic opening is used as the corrected opening of the switch solenoid valve.

7. The anti-icing control method according to claim 1, characterized in that: If the wall temperature of the gas outlet chamber is not less than a preset temperature, the method further includes: Close the switching solenoid valve.

8. An anti-icing control device for a respirator outlet chamber, characterized in that: The input end of the high-pressure gas insulation pipeline is connected to the output end of the supercharger post-compression pipeline, and the high-pressure gas insulation pipeline is arranged along the periphery of the respirator outlet chamber; a switch solenoid valve is arranged inside the high-pressure gas insulation pipeline; the high-pressure gas insulation pipeline heats the respirator outlet chamber through the gas generated by the supercharger post-compression pipeline; The anti-icing control device comprises: A temperature detection module, used to detect the wall temperature of the gas outlet chamber; A pressure detection module, used for detecting the outlet pressure of the crankcase if the wall temperature of the outlet chamber is lower than a preset temperature; A first opening control module, configured to adjust the opening of the switch solenoid valve to a default opening if the outlet pressure is greater than the outlet pressure limit; the default opening is greater than zero; An opening correction module, used for determining a correction opening of the switch solenoid valve based on the wall temperature, the temperature of the gas after the compressor and the outlet pressure of the crankcase; The second opening control module is used to adjust the opening of the switch solenoid valve to the modified opening; the opening of the switch solenoid valve continues to be the modified opening for a time period greater than a preset time period.

9. An electronic device, characterized in that: The method comprises at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic device can implement the anti-icing control method for the air outlet chamber of the respirator according to any one of claims 1 to 7.

10. A computer storage medium, characterized in that: The storage medium carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement the anti-icing control method for the respirator outlet chamber as described in any one of claims 1 to 7.

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