CN117418919B - Anti-icing method and anti-icing device of respirator - Google Patents
Anti-icing method and anti-icing device of respirator Download PDFInfo
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- CN117418919B CN117418919B CN202311738081.0A CN202311738081A CN117418919B CN 117418919 B CN117418919 B CN 117418919B CN 202311738081 A CN202311738081 A CN 202311738081A CN 117418919 B CN117418919 B CN 117418919B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims description 58
- 239000007924 injection Substances 0.000 claims description 58
- 230000008018 melting Effects 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 239000000446 fuel Substances 0.000 description 9
- 238000013507 mapping Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/16—Control of the pumps by bypassing charging air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Abstract
The invention provides an anti-icing method and an anti-icing device of a respirator, which are applied to an engine, wherein the engine comprises a gas compressor and a turbine, and the anti-icing method comprises the following steps: determining that the ambient temperature is at an icing temperature; judging whether the engine is in a reverse towing working condition, if so, controlling the air outlet pipe of the respirator to be communicated with the vortex front air outlet pipe of the turbine; if not, controlling the air outlet pipe of the respirator to be communicated with the air outlet pipe of the air compressor. According to the technical scheme provided by the invention, the high-temperature gas of the gas outlet pipe of the compressor or the high-temperature gas of the vortex front exhaust pipe of the turbine is selected to be led back to the gas outlet pipe of the respirator, so that the purpose of heating the gas outlet pipe of the respirator is achieved, and the problem of low-temperature icing of the gas outlet pipe of the respirator is avoided.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an anti-icing method and an anti-icing device of a respirator.
Background
The gas exhausted by the gas outlet pipe of the respirator of the engine contains a large amount of water vapor, the pipeline of the gas outlet pipe of the respirator is longer, the tail end of the gas outlet pipe of the respirator (namely the gas outlet end of the respirator) is far away from the gas outlet of the engine, and the phenomenon that the gas outlet pipe of the respirator is frozen can occur in a cold environment. If the temperature is always in a low-temperature environment, the ice blocks in the air outlet pipe of the respirator are gradually increased, and the phenomenon that the air outlet pipe of the respirator is blocked can occur, so that the problem that the engine is damaged due to overlarge internal pressure of the engine is solved.
Disclosure of Invention
In view of the above, the invention provides an anti-icing method and an anti-icing device for a respirator, which effectively solve the technical problems in the prior art, and the purpose of heating the air outlet pipe of the respirator is achieved by selecting the high-temperature gas of the air outlet pipe of a compressor or the high-temperature gas of the air outlet pipe of a turbine before vortex to be led back to the air outlet pipe of the respirator, so that the low-temperature icing problem of the air outlet pipe of the respirator is avoided.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
an anti-icing method for a respirator applied to an engine, the engine comprising a compressor and a turbine, the anti-icing method comprising:
determining that the ambient temperature is at an icing temperature;
judging whether the engine is in a reverse towing working condition, if so, controlling the air outlet pipe of the respirator to be communicated with the vortex front air outlet pipe of the turbine;
if not, controlling the air outlet pipe of the respirator to be communicated with the air outlet pipe of the air compressor.
Optionally, determining whether the engine is in a reverse towing condition includes:
acquiring the oil injection quantity of the engine;
judging whether the oil injection quantity of the engine is smaller than a set oil injection quantity, if so, determining that the engine is in a reverse driving condition;
if not, determining that the engine is in a non-reverse towing working condition;
or, judging whether the engine is in a reverse towing condition, including:
acquiring the oil injection quantity and the rotating speed of the engine;
judging whether the rotating speed of the engine is smaller than a set rotating speed, judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity, and if yes, determining that the engine is in a reverse dragging working condition;
and if at least one of the two judging results is negative, determining that the engine is in a non-reverse driving working condition.
Optionally, after determining that the ambient temperature is at the icing temperature and before determining whether the engine is in a reverse driving condition; or, while judging whether the engine is in a reverse driving condition, the anti-icing method further comprises:
determining a target heat amount required for deicing at an air outlet pipe of the respirator, wherein after judging that the engine is in a reverse driving condition, the method further comprises: acquiring the temperature of the pre-vortex exhaust gas of the turbine, and controlling the flow of gas flowing from the pre-vortex exhaust pipe of the turbine to the gas outlet pipe of the respirator according to the target heat and the temperature of the pre-vortex exhaust gas of the turbine; or,
after judging that the engine is not in the reverse driving working condition, the method further comprises the following steps: and acquiring the air outlet temperature of the air compressor, and controlling the air flow of an air outlet pipe of the air compressor to the air outlet pipe of the respirator according to the target heat and the air outlet temperature of the air compressor.
Optionally, determining a target heat amount required for ice melting at an outlet duct of the respirator includes:
acquiring the actual air outlet amount in an air outlet pipe of the respirator;
and determining target heat required by ice melting at an air outlet pipe of the respirator according to the ambient temperature and the actual air outlet amount.
Optionally, obtaining the actual air outlet amount in the air outlet pipe of the respirator includes:
acquiring operation parameters of the engine, wherein the operation parameters comprise rotating speed, oil injection quantity, advance angle, air inflow and air inflow humidity;
and acquiring the actual air outlet quantity in the air outlet pipe of the respirator according to the operation parameters.
Correspondingly, the invention also provides an anti-icing device of the respirator, which is applied to an engine, wherein the engine comprises a compressor and a turbine, and the anti-icing device comprises:
a first bypass valve connected between the outlet pipe of the respirator and the outlet pipe of the compressor;
a second bypass valve connected between the outlet duct of the respirator and the pre-vortex outlet duct of the turbine;
and the controller is used for controlling the first bypass valve to be conducted when the environment temperature is at the icing temperature and the engine is judged to be in a non-reverse-towing working condition, and controlling the second bypass valve to be conducted when the engine is judged to be in the reverse-towing working condition.
Optionally, the controller includes:
the oil injection quantity acquisition unit is used for acquiring the oil injection quantity of the engine;
the working condition processing unit is used for judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity, if yes, determining that the engine is in a reverse towing working condition; if not, determining that the engine is in a non-reverse towing working condition;
alternatively, the controller includes:
the oil injection quantity acquisition unit is used for acquiring the oil injection quantity of the engine;
a rotation speed acquisition unit for acquiring a rotation speed of the engine;
the working condition processing unit is used for judging whether the rotating speed of the engine is smaller than the set rotating speed or not, judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity or not at the same time, and if the two judging results are yes, determining that the engine is in a reverse dragging working condition; and if at least one of the two judging results is negative, determining that the engine is in a non-reverse driving working condition.
Optionally, the controller further includes:
a heat determination unit for determining a target heat amount required for ice formation at an outlet duct of the respirator;
a pre-vortex temperature acquisition unit for acquiring a pre-vortex exhaust gas temperature of the turbine;
the compressed air temperature acquisition unit is used for acquiring the air outlet temperature of the air compressor;
when the controller judges that the engine is not in a reverse driving working condition, the opening of the first bypass valve is controlled according to the target heat and the air outlet temperature of the air compressor; or when the controller judges that the engine is in a reverse driving working condition, controlling the opening degree of the second bypass valve according to the target heat and the pre-vortex exhaust temperature of the turbine.
Optionally, the heat determining unit includes:
the air quantity acquisition module is used for acquiring actual air outlet quantity in an air outlet pipe of the respirator;
and the heat treatment module is used for determining target heat required by ice melting at the air outlet pipe of the respirator according to the ambient temperature and the actual air outlet amount.
Optionally, the air volume acquisition module includes:
the parameter acquisition sub-module is used for acquiring the operation parameters of the engine, wherein the operation parameters comprise rotating speed, oil injection quantity, advance angle, air inflow and air inflow humidity;
and the air quantity processing sub-module is used for acquiring the actual air outlet quantity in the air outlet pipe of the respirator according to the operation parameters.
Compared with the prior art, the technical scheme provided by the invention has at least the following advantages:
the invention provides an anti-icing method and an anti-icing device of a respirator, which are applied to an engine, wherein the engine comprises a gas compressor and a turbine, and the anti-icing method comprises the following steps: determining that the ambient temperature is at an icing temperature; judging whether the engine is in a reverse towing working condition, if so, controlling the air outlet pipe of the respirator to be communicated with the vortex front air outlet pipe of the turbine; if not, controlling the air outlet pipe of the respirator to be communicated with the air outlet pipe of the air compressor.
According to the technical scheme, the high-temperature gas of the gas outlet pipe of the compressor or the high-temperature gas of the gas outlet pipe in front of the turbine is selected to be led back to the gas outlet pipe of the respirator, so that the purpose of heating the gas outlet pipe of the respirator is achieved, and the problem of low-temperature icing of the gas outlet pipe of the respirator is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of anti-icing a respirator provided in an embodiment of the present invention;
FIG. 2 is a flow chart of another method of anti-icing a respirator provided in an embodiment of the present invention;
FIG. 3 is a flow chart of a method of ice protection for a respirator provided in accordance with an embodiment of the present invention;
FIG. 4 is a flow chart of a method of ice protection for a respirator provided in accordance with an embodiment of the present invention;
FIG. 5 is a flow chart of a method of ice protection for a respirator provided in accordance with an embodiment of the present invention;
FIG. 6 is a flow chart of a method of ice protection for a respirator provided in accordance with an embodiment of the present invention;
fig. 7 is a schematic structural view of an anti-icing device of a respirator according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As described in the background art, the gas exhausted from the gas outlet pipe of the respirator of the engine contains a large amount of water vapor, the pipeline of the gas outlet pipe of the respirator is long, the tail end of the gas outlet pipe of the respirator (i.e. the gas outlet end of the respirator) is far away from the gas outlet of the engine, and the phenomenon that the gas outlet pipe of the respirator is frozen can occur in a cold environment. If the temperature is always in a low-temperature environment, the ice blocks in the air outlet pipe of the respirator are gradually increased, and the phenomenon that the air outlet pipe of the respirator is blocked can occur, so that the problem that the engine is damaged due to overlarge internal pressure of the engine is solved.
Based on the above, the embodiment of the invention provides an anti-icing method and an anti-icing device for a respirator, which effectively solve the technical problems in the prior art, and the purpose of heating the air outlet pipe of the respirator is achieved by selecting high-temperature gas of the air outlet pipe of a compressor or high-temperature gas of the air outlet pipe of a turbine before vortex to be led back to the air outlet pipe of the respirator, so that the low-temperature icing problem of the air outlet pipe of the respirator is avoided.
In order to achieve the above objective, the technical solutions provided by the embodiments of the present invention are described in detail below, with reference to fig. 1 to 7.
Referring to fig. 1, a flowchart of an anti-icing method of a respirator according to an embodiment of the present invention is shown, where the anti-icing method of the respirator is applied to an engine, the engine includes a compressor and a turbine, and the anti-icing method includes:
s1, determining that the ambient temperature is at the freezing temperature.
S2, judging whether the engine is in a reverse towing working condition, if so, controlling the air outlet pipe of the respirator to be communicated with the pre-vortex air outlet pipe of the turbine.
If not, controlling the air outlet pipe of the respirator to be communicated with the air outlet pipe of the air compressor.
Optionally, when the turbine front exhaust pipe provided by the embodiment of the invention is communicated with the air outlet pipe of the respirator, the air inlet end of the turbine front exhaust pipe is preferably communicated with the air inlet end of the air outlet pipe of the respirator, so that the deicing effect is improved. Similarly, when the air outlet pipe of the air compressor is communicated with the air outlet pipe of the respirator, the air inlet end of the air outlet pipe of the air compressor is preferably communicated with the air inlet end of the air outlet pipe of the respirator, so that the deicing effect is improved.
It can be appreciated that according to the technical scheme provided by the embodiment of the invention, the high-temperature gas of the gas outlet pipe of the gas compressor or the high-temperature gas of the gas outlet pipe before the vortex of the turbine is selected to be led back to the gas outlet pipe of the respirator, so that the purpose of heating the gas outlet pipe of the respirator is achieved, and the problem of low-temperature icing of the gas outlet pipe of the respirator is avoided. When the engine is in a reverse-dragging working condition, the supercharging capacity of a supercharger of the engine is weaker, the air outlet temperature of the air compressor is lower, the temperature of the pre-vortex exhaust gas of the turbine is higher, and pollutants generated by combustion are avoided, so that the air outlet pipe of the respirator is controlled to be communicated with the pre-vortex exhaust pipe of the turbine. When the engine is in a non-reverse-towing working condition, the supercharging capacity of the supercharger is strong, and the air outlet temperature of the air compressor is high, so that the air outlet pipe of the control respirator is communicated with the air outlet pipe of the air compressor.
In an embodiment of the present invention, the embodiment of the present invention may determine the engine operating condition with reference to the fuel injection amount of the engine. Referring to fig. 2, a flowchart of another anti-icing method for a respirator according to an embodiment of the present invention is shown, where S2, determining whether the engine is in a reverse driving condition includes:
s201, acquiring the oil injection quantity of the engine.
S202, judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity, and if yes, determining that the engine is in a reverse driving condition.
If not, determining that the engine is in a non-reverse towing working condition.
Or, in order to improve the accuracy of judging the working condition of the engine, the embodiment of the invention can judge the working condition of the engine by referring to the fuel injection quantity and the rotating speed of the engine at the same time. Referring to fig. 3, a flowchart of an anti-icing method of a respirator according to an embodiment of the present invention is shown, where S2, determining whether the engine is in a reverse driving condition includes:
s211, acquiring the fuel injection quantity and the rotating speed of the engine.
S212, judging whether the rotating speed of the engine is smaller than the set rotating speed, judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity, and if yes, determining that the engine is in a reverse driving condition.
And if at least one of the two judging results is negative, determining that the engine is in a non-reverse driving working condition.
It should be noted that, the technical solution provided by the embodiment of the present invention is not limited to determining the operating condition of the engine by referring to the fuel injection amount and the rotational speed of the engine, and in other embodiments of the present invention, the operating condition of the engine may also be determined by other parameters, which is not particularly limited.
In an embodiment of the invention, when the air outlet pipe of the respirator is communicated with the air outlet pipe of the air compressor, or when the air outlet pipe of the respirator is communicated with the pre-vortex air outlet pipe of the turbine, the communication pipeline can be completely communicated, namely the air flow entering the air outlet pipe of the respirator is the flow of the air outlet pipe of the air compressor or the flow of the pre-vortex air outlet pipe of the turbine. In addition, in order to avoid the waste of energy, the gas flow of the gas outlet pipe of the gas compressor or the gas flow of the gas outlet pipe of the turbine, which flows to the gas outlet pipe of the respirator, can be accurately controlled according to the heat required by the ice melting at the gas outlet pipe of the respirator. Referring specifically to fig. 4, a flowchart of an anti-icing method of a respirator according to an embodiment of the present invention is provided, where after S1, it is determined that an ambient temperature is at an icing temperature, and it is determined whether the engine is in a reverse driving condition; the anti-icing method further comprises the following steps:
s11, determining target heat required by ice melting at an air outlet pipe of the respirator, wherein after judging that the engine is in a reverse driving condition, the method further comprises the following steps: s21, acquiring the temperature of the pre-vortex exhaust gas of the turbine, and controlling the flow of gas flowing to the gas outlet pipe of the respirator from the pre-vortex exhaust pipe of the turbine according to the target heat and the temperature of the pre-vortex exhaust gas of the turbine; or,
after judging that the engine is not in the reverse driving working condition, the method further comprises the following steps: s22, obtaining the air outlet temperature of the air compressor, and controlling the air flow of an air outlet pipe of the air compressor to the air outlet pipe of the respirator according to the target heat and the air outlet temperature of the air compressor.
In an embodiment of the present invention, the gas flow of the pre-vortex exhaust pipe of the turbine provided by the embodiment of the present invention flowing to the air outlet pipe of the respirator may be obtained by a table lookup method, that is, the mapping table includes the heat required for deicing, the pre-vortex exhaust temperature of the turbine, and the data related to the gas flow, and the gas flow is determined according to the obtained target heat and the pre-vortex exhaust temperature of the turbine, so that the purpose of deicing the air outlet pipe of the respirator is achieved, and the waste of resources is reduced. Similarly, the gas flow of the gas outlet pipe of the gas compressor flowing to the gas outlet pipe of the respirator can be obtained in a table look-up mode, namely, the mapping table comprises the heat required by deicing, the gas outlet temperature of the gas compressor and data related to the gas flow, and the gas flow is determined according to the obtained target heat and the gas outlet temperature of the gas compressor, so that the aim of deicing the gas outlet pipe of the respirator is achieved, and meanwhile, the waste of resources is reduced.
It should be noted that, the target heat required for deicing the air outlet pipe of the respirator provided by the embodiment of the invention can be obtained before judging whether the engine is in the reverse towing working condition. In other embodiments of the present invention, the target heat required for ice melting at the air outlet pipe of the respirator provided by the embodiment of the present invention may be obtained while judging whether the engine is in the reverse driving condition, which is not particularly limited.
In one embodiment of the present invention, the target heat provided by the embodiments of the present invention may be obtained based on ambient temperature and the output of the ventilator. Referring to fig. 5, a flowchart of a method for preventing ice formation of a respirator according to an embodiment of the present invention is provided, where determining a target heat amount required for ice formation at an outlet duct of the respirator includes:
s111, acquiring actual air outlet quantity in an air outlet pipe of the respirator.
S112, determining target heat required by ice melting at an air outlet pipe of the respirator according to the ambient temperature and the actual air outlet amount.
Referring further to fig. 6, a flowchart of an anti-icing method of a respirator according to an embodiment of the present invention is shown, where S111, obtaining an actual air outlet amount in an air outlet pipe of the respirator includes:
s1111, acquiring operation parameters of the engine, wherein the operation parameters comprise rotation speed, oil injection quantity, advance angle, air inflow and air inflow humidity.
S1112, acquiring the actual air outlet amount in the air outlet pipe of the respirator according to the operation parameters.
It will be appreciated that the operating parameters provided by embodiments of the present invention are related to the amount of gas output from the ventilator, and thus the actual amount of gas output from the ventilator can be determined based on the operating parameters. Specifically, the rotational speed and the fuel injection quantity of the engine represent the current power of the engine, and the higher the power is, the higher the in-cylinder pressure is, so that the larger the air outlet quantity of the respirator is. And under the same power of the engine, different engine ignition advance angles can lead to different in-cylinder pressures, and the air outlet quantity of the respirator can be corrected according to the ignition advance angles. Under the same power of the engine, the air inflow of the engine is different in summer and winter, when the air inflow of the engine is large in winter, the pressure in the cylinder of the engine is large, the air outflow of the respirator is large, and the correction can be carried out according to the air inflow of the engine. And, there is a positive correlation between the engine intake air humidity and the humidity of the output of the respirator, so the intake air humidity must also be taken into account.
Optionally, the target heat provided by the embodiment of the invention can be obtained through table lookup, that is, the mapping table comprises data related to the ambient temperature, the actual air outlet amount in the air outlet pipe of the respirator and the heat required for deicing, and the target heat required for deicing can be found according to the obtained ambient temperature and the actual air outlet amount in the air outlet pipe of the respirator. Similarly, the actual air outlet amount in the air outlet pipe of the respirator can also be obtained through table lookup, namely the mapping table comprises data related to the operation parameters and the air outlet amount in the air outlet pipe of the respirator, namely the data related to the rotation speed, the oil injection amount, the advance angle, the air inlet amount, the air inlet humidity and the air outlet amount in the air outlet pipe of the respirator, and the actual air outlet amount in the air outlet pipe of the respirator can be obtained through table lookup after the related operation parameters are obtained.
Correspondingly, the embodiment of the invention also provides an anti-icing device of the respirator. Referring to fig. 7, a schematic structural diagram of an anti-icing device of a respirator according to an embodiment of the present invention is shown, where the anti-icing device of the respirator is applied to an engine, the engine includes a compressor and a turbine, and the anti-icing device includes:
a first bypass valve 410 connected between the outlet duct 100 of the respirator and the outlet duct 200 of the compressor. A second bypass valve 420 connected between the outlet duct 100 of the respirator and the pre-vortex outlet duct 300 of the turbine. And a controller for controlling the first bypass valve 410 to be turned on when the ambient temperature is at the icing temperature, and controlling the second bypass valve 420 to be turned on when the engine is not in the reverse driving condition.
As shown in fig. 7, the engine further includes an intercooler, a cylinder, and the like, which are the same as those in the prior art, so that redundant description is omitted in the embodiment of the present invention.
Preferably, the first bypass valve provided by the embodiment of the invention is preferably connected at the air inlet end of the air outlet pipe of the air compressor and communicated with the air inlet end of the air outlet pipe of the respirator, so that the deicing effect is improved. Similarly, the second bypass valve is connected with the air inlet end of the turbine front vortex exhaust pipe and the air inlet end of the air outlet pipe of the respirator, so that the deicing effect is improved.
It can be appreciated that according to the technical scheme provided by the embodiment of the invention, the high-temperature gas of the gas outlet pipe of the gas compressor or the high-temperature gas of the gas outlet pipe before the vortex of the turbine is selected to be led back to the gas outlet pipe of the respirator, so that the purpose of heating the gas outlet pipe of the respirator is achieved, and the problem of low-temperature icing of the gas outlet pipe of the respirator is avoided. When the engine is in a reverse-dragging working condition, the supercharging capacity of a supercharger of the engine is weaker, the air outlet temperature of the air compressor is lower, the temperature of the pre-vortex exhaust gas of the turbine is higher, and pollutants generated by combustion are avoided, so that the air outlet pipe of the respirator is controlled to be communicated with the pre-vortex exhaust pipe of the turbine. When the engine is in a non-reverse-towing working condition, the supercharging capacity of the supercharger is strong, and the air outlet temperature of the air compressor is high, so that the air outlet pipe of the control respirator is communicated with the air outlet pipe of the air compressor.
In an embodiment of the present invention, the embodiment of the present invention may determine the engine operating condition with reference to the fuel injection amount of the engine. Namely, the controller provided by the embodiment of the invention comprises: the oil injection quantity acquisition unit is used for acquiring the oil injection quantity of the engine; the working condition processing unit is used for judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity, if yes, determining that the engine is in a reverse towing working condition; if not, determining that the engine is in a non-reverse towing working condition.
Or, in order to improve the accuracy of judging the working condition of the engine, the embodiment of the invention can judge the working condition of the engine by referring to the fuel injection quantity and the rotating speed of the engine at the same time. Namely, the controller provided by the embodiment of the invention comprises: the oil injection quantity acquisition unit is used for acquiring the oil injection quantity of the engine; a rotation speed acquisition unit for acquiring a rotation speed of the engine; the working condition processing unit is used for judging whether the rotating speed of the engine is smaller than the set rotating speed or not, judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity or not at the same time, and if the two judging results are yes, determining that the engine is in a reverse dragging working condition; and if at least one of the two judging results is negative, determining that the engine is in a non-reverse driving working condition.
It should be noted that, the technical solution provided by the embodiment of the present invention is not limited to determining the operating condition of the engine by referring to the fuel injection amount and the rotational speed of the engine, and in other embodiments of the present invention, the operating condition of the engine may also be determined by other parameters, which is not particularly limited.
In an embodiment of the invention, when the air outlet pipe of the respirator provided by the embodiment of the invention is communicated with the air outlet pipe of the air compressor, or when the air outlet pipe of the respirator is communicated with the vortex front exhaust pipe of the turbine, the communication pipeline can be completely communicated, namely, the opening degree of the bypass valve is controlled to be 100%. In addition, in order to avoid the waste of energy, the opening of the bypass valve can be accurately controlled according to the heat required by the ice melting at the air outlet pipe of the respirator, so as to control the air flow of the air outlet pipe of the compressor or the air outlet pipe of the turbine before vortex to the air outlet pipe of the respirator. Optionally, the controller provided by the embodiment of the present invention further includes: a heat determination unit for determining a target heat amount required for ice formation at an outlet duct of the respirator; a pre-vortex temperature acquisition unit for acquiring a pre-vortex exhaust gas temperature of the turbine; the compressed air temperature acquisition unit is used for acquiring the air outlet temperature of the air compressor; when the controller judges that the engine is not in a reverse driving working condition, the opening of the first bypass valve is controlled according to the target heat and the air outlet temperature of the air compressor; or when the controller judges that the engine is in a reverse driving working condition, controlling the opening degree of the second bypass valve according to the target heat and the pre-vortex exhaust temperature of the turbine.
In an embodiment of the present invention, the opening of the first bypass valve provided in the embodiment of the present invention may be obtained by a table look-up method, that is, the mapping table includes data related to the heat required for deicing, the air outlet temperature of the air compressor, and the opening of the first bypass valve is determined according to the obtained target heat and the air outlet temperature of the air compressor, so that the purpose of deicing the air outlet pipe of the respirator is achieved, and at the same time, the waste of resources is reduced. Similarly, the opening of the second bypass valve can be obtained in a table look-up mode, namely the mapping table comprises data related to the heat required for deicing, the pre-vortex exhaust temperature of the turbine and the opening of the second bypass valve, and the opening of the second bypass valve is determined according to the obtained target heat and the pre-vortex exhaust temperature of the turbine, so that the purpose of deicing the air outlet pipe of the respirator is achieved, and meanwhile, the waste of resources is reduced.
It should be noted that, the target heat required for deicing the air outlet pipe of the respirator provided by the embodiment of the invention can be obtained before judging whether the engine is in the reverse towing working condition. In other embodiments of the present invention, the target heat required for ice melting at the air outlet pipe of the respirator provided by the embodiment of the present invention may be obtained while judging whether the engine is in the reverse driving condition, which is not particularly limited.
In one embodiment of the present invention, the target heat provided by the embodiments of the present invention may be obtained based on ambient temperature and the output of the ventilator. Namely, the heat determining unit provided by the embodiment of the invention comprises: the air quantity acquisition module is used for acquiring actual air outlet quantity in an air outlet pipe of the respirator; and the heat treatment module is used for determining target heat required by ice melting at the air outlet pipe of the respirator according to the ambient temperature and the actual air outlet amount.
Further, the air volume acquisition module provided by the embodiment of the invention comprises: the parameter acquisition sub-module is used for acquiring the operation parameters of the engine, wherein the operation parameters comprise rotating speed, oil injection quantity, advance angle, air inflow and air inflow humidity; and the air quantity processing sub-module is used for acquiring the actual air outlet quantity in the air outlet pipe of the respirator according to the operation parameters.
It will be appreciated that the operating parameters provided by embodiments of the present invention are related to the amount of gas output from the ventilator, and thus the actual amount of gas output from the ventilator can be determined based on the operating parameters. Specifically, the rotational speed and the fuel injection quantity of the engine represent the current power of the engine, and the higher the power is, the higher the in-cylinder pressure is, so that the larger the air outlet quantity of the respirator is. And under the same power of the engine, different engine ignition advance angles can lead to different in-cylinder pressures, and the air outlet quantity of the respirator can be corrected according to the ignition advance angles. Under the same power of the engine, the air inflow of the engine is different in summer and winter, when the air inflow of the engine is large in winter, the pressure in the cylinder of the engine is large, the air outflow of the respirator is large, and the correction can be carried out according to the air inflow of the engine. And, there is a positive correlation between the engine intake air humidity and the humidity of the output of the respirator, so the intake air humidity must also be taken into account.
Optionally, the target heat provided by the embodiment of the invention can be obtained through table lookup, that is, the mapping table comprises data related to the ambient temperature, the actual air outlet amount in the air outlet pipe of the respirator and the heat required for deicing, and the target heat required for deicing can be found according to the obtained ambient temperature and the actual air outlet amount in the air outlet pipe of the respirator. Similarly, the actual air outlet amount in the air outlet pipe of the respirator can also be obtained through table lookup, namely the mapping table comprises data related to the operation parameters and the air outlet amount in the air outlet pipe of the respirator, namely the data related to the rotation speed, the oil injection amount, the advance angle, the air inlet amount, the air inlet humidity and the air outlet amount in the air outlet pipe of the respirator, and the actual air outlet amount in the air outlet pipe of the respirator can be obtained through table lookup after the related operation parameters are obtained.
In any of the above embodiments of the present invention, the controller provided in the embodiment of the present invention may control the bypass valve in a wired manner, and may also control the bypass valve in a wireless manner. Namely, the controller provided by the embodiment of the invention can be a server, a PC, a PAD, a mobile phone, an ECU (Electronic Control Unit, an electronic controller unit), a VCU (Vehicle Control Unit, a whole vehicle controller), an MCU (Micro Controller Unit, a micro-control unit), an HCU (Hybrid Control Unit, a hybrid control system) and the like
The embodiment of the invention provides an anti-icing method and an anti-icing device of a respirator, which are applied to an engine, wherein the engine comprises a gas compressor and a turbine, and the anti-icing method comprises the following steps: determining that the ambient temperature is at an icing temperature; judging whether the engine is in a reverse towing working condition, if so, controlling the air outlet pipe of the respirator to be communicated with the vortex front air outlet pipe of the turbine; if not, controlling the air outlet pipe of the respirator to be communicated with the air outlet pipe of the air compressor.
From the above, it can be seen that the technical scheme provided by the embodiment of the invention is that the high-temperature gas of the gas outlet pipe of the gas compressor or the high-temperature gas of the gas outlet pipe before the turbine vortex is selected to be led back to the gas outlet pipe of the respirator, so that the purpose of heating the gas outlet pipe of the respirator is achieved, and the problem of low-temperature icing of the gas outlet pipe of the respirator is avoided.
In the description of the present invention, it should be understood that the directions or positional relationships as indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are based on the directions or positional relationships shown in the drawings are merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. An anti-icing method for a respirator applied to an engine, the engine comprising a compressor and a turbine, the anti-icing method comprising:
determining that the ambient temperature is at an icing temperature;
judging whether the engine is in a reverse towing working condition, if so, controlling the air outlet pipe of the respirator to be communicated with the vortex front air outlet pipe of the turbine;
if not, controlling the air outlet pipe of the respirator to be communicated with the air outlet pipe of the air compressor.
2. The method of claim 1, wherein determining whether the engine is in a reverse drive condition comprises:
acquiring the oil injection quantity of the engine;
judging whether the oil injection quantity of the engine is smaller than a set oil injection quantity, if so, determining that the engine is in a reverse driving condition;
if not, determining that the engine is in a non-reverse towing working condition;
or, judging whether the engine is in a reverse towing condition, including:
acquiring the oil injection quantity and the rotating speed of the engine;
judging whether the rotating speed of the engine is smaller than a set rotating speed, judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity, and if yes, determining that the engine is in a reverse dragging working condition;
and if at least one of the two judging results is negative, determining that the engine is in a non-reverse driving working condition.
3. The method of claim 1, wherein after determining that the ambient temperature is at the icing temperature and before determining whether the engine is in a reverse drive condition; or, while judging whether the engine is in a reverse driving condition, the anti-icing method further comprises:
determining a target heat amount required for deicing at an air outlet pipe of the respirator, wherein after judging that the engine is in a reverse driving condition, the method further comprises: acquiring the temperature of the pre-vortex exhaust gas of the turbine, and controlling the flow of gas flowing from the pre-vortex exhaust pipe of the turbine to the gas outlet pipe of the respirator according to the target heat and the temperature of the pre-vortex exhaust gas of the turbine; or,
after judging that the engine is not in the reverse driving working condition, the method further comprises the following steps: and acquiring the air outlet temperature of the air compressor, and controlling the air flow of an air outlet pipe of the air compressor to the air outlet pipe of the respirator according to the target heat and the air outlet temperature of the air compressor.
4. A method of ice protection for a respirator according to claim 3, wherein determining the target heat required to ice at the outlet duct of the respirator comprises:
acquiring the actual air outlet amount in an air outlet pipe of the respirator;
and determining target heat required by ice melting at an air outlet pipe of the respirator according to the ambient temperature and the actual air outlet amount.
5. The method of claim 4, wherein obtaining the actual air output in the air outlet duct of the respirator comprises:
acquiring operation parameters of the engine, wherein the operation parameters comprise rotating speed, oil injection quantity, advance angle, air inflow and air inflow humidity;
and acquiring the actual air outlet quantity in the air outlet pipe of the respirator according to the operation parameters.
6. An anti-icing device for a respirator for use with an engine, the engine comprising a compressor and a turbine, the anti-icing device comprising:
a first bypass valve connected between the outlet pipe of the respirator and the outlet pipe of the compressor;
a second bypass valve connected between the outlet duct of the respirator and the pre-vortex outlet duct of the turbine;
and the controller is used for controlling the first bypass valve to be conducted when the environment temperature is at the icing temperature and the engine is judged to be in a non-reverse-towing working condition, and controlling the second bypass valve to be conducted when the engine is judged to be in the reverse-towing working condition.
7. The anti-icing device for a respirator according to claim 6 wherein the controller comprises:
the oil injection quantity acquisition unit is used for acquiring the oil injection quantity of the engine;
the working condition processing unit is used for judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity, if yes, determining that the engine is in a reverse towing working condition; if not, determining that the engine is in a non-reverse towing working condition;
alternatively, the controller includes:
the oil injection quantity acquisition unit is used for acquiring the oil injection quantity of the engine;
a rotation speed acquisition unit for acquiring a rotation speed of the engine;
the working condition processing unit is used for judging whether the rotating speed of the engine is smaller than the set rotating speed or not, judging whether the oil injection quantity of the engine is smaller than the set oil injection quantity or not at the same time, and if the two judging results are yes, determining that the engine is in a reverse dragging working condition; and if at least one of the two judging results is negative, determining that the engine is in a non-reverse driving working condition.
8. The anti-icing device for a respirator according to claim 6, wherein the controller further comprises:
a heat determination unit for determining a target heat amount required for ice formation at an outlet duct of the respirator;
a pre-vortex temperature acquisition unit for acquiring a pre-vortex exhaust gas temperature of the turbine;
the compressed air temperature acquisition unit is used for acquiring the air outlet temperature of the air compressor;
when the controller judges that the engine is not in a reverse driving working condition, the opening of the first bypass valve is controlled according to the target heat and the air outlet temperature of the air compressor; or when the controller judges that the engine is in a reverse driving working condition, controlling the opening degree of the second bypass valve according to the target heat and the pre-vortex exhaust temperature of the turbine.
9. The anti-icing device for a respirator according to claim 8, wherein the heat determination unit comprises:
the air quantity acquisition module is used for acquiring actual air outlet quantity in an air outlet pipe of the respirator;
and the heat treatment module is used for determining target heat required by ice melting at the air outlet pipe of the respirator according to the ambient temperature and the actual air outlet amount.
10. The anti-icing device for a respirator according to claim 9, wherein the air flow acquisition module comprises:
the parameter acquisition sub-module is used for acquiring the operation parameters of the engine, wherein the operation parameters comprise rotating speed, oil injection quantity, advance angle, air inflow and air inflow humidity;
and the air quantity processing sub-module is used for acquiring the actual air outlet quantity in the air outlet pipe of the respirator according to the operation parameters.
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