CN114592994A - Vehicle, engine system and method for preventing crankcase ventilation pipe from icing - Google Patents
Vehicle, engine system and method for preventing crankcase ventilation pipe from icing Download PDFInfo
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- CN114592994A CN114592994A CN202110282888.2A CN202110282888A CN114592994A CN 114592994 A CN114592994 A CN 114592994A CN 202110282888 A CN202110282888 A CN 202110282888A CN 114592994 A CN114592994 A CN 114592994A
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- air
- crankcase ventilation
- gas
- ventilation pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
- F02M35/042—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices combined with other devices, e.g. heaters ; for use other than engine air intake cleaning, e.g. air intake filters arranged in the fuel vapour recovery system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/13—Combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
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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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention relates to an engine system, a method for preventing a crankcase ventilation pipe from being frozen and a vehicle, wherein the engine system comprises the crankcase ventilation pipe, an air filter and an air filtering air pipe connected between the air filter and a crankcase, two ends of the crankcase ventilation pipe are respectively connected to the crankcase and the air filtering air pipe, a heating assembly is arranged inside the air filter, and the heating assembly is configured to heat gas entering the air filter when the external environment temperature is less than or equal to 0 ℃ and the gas temperature at the interface of the crankcase ventilation pipe and the air filtering air pipe is less than the gas temperature inside the crankcase ventilation pipe. The outside air is heated by the heating component flowing through the air filtering air inlet pipe, so that the temperature of the air reaching the joint of the crankcase ventilation pipe and the air filtering air pipe is greater than or equal to the temperature of the air fleeing from the crankcase ventilation pipe, the air fleeing from the crankcase ventilation pipe is prevented from being cooled to separate out water drops and be condensed into ice, and the problem of icing of the crankcase ventilation pipe is solved.
Description
Technical Field
The disclosure relates to the technical field of vehicle parts, in particular to an engine system, a method for preventing a crankcase ventilation pipe in the engine system from being frozen and a vehicle.
Background
When the engine works, high-pressure combustible mixed gas and burnt gas in the combustion chamber can more or less leak into a crankcase through a gap between the piston group and the cylinder, and blow-by gas is caused. Blow-by gas can cause the crankcase pressure to be too high and damage the crankcase seal, resulting in engine oil leakage loss. Therefore, in order to prevent the crankcase from being excessively pressurized and the engine from leaking oil, and to prolong the service life of the engine oil, a ventilation pipe is generally provided on the crankcase to discharge the gas leaked into the crankcase through the ventilation pipe. To avoid contamination by the gases in the crankcase being vented directly to the atmosphere, the crankcase ventilation duct may be connected to the engine system at a suitable location in the intake line so that the gases may be returned to the cylinder for re-combustion, for example by connecting the crankcase ventilation duct to the outlet duct of an air cleaner. Therefore, when the vehicle runs in a low-temperature environment, for example, the temperature in northern part can reach-35 ℃ or even lower in cold winter, the temperature of air fleeing from the engine crankcase is 5 ℃, at the moment, 40-degree temperature difference exists, cold air in the atmosphere enters through the air filter, when reaching the air filtering air pipe and meeting hot air fleeing from the crankcase ventilation pipe, hot gas is diluted, the temperature is lowered, the saturation is lowered from high, water drops are separated out, ice blocks are formed instantly and attached to the intersection of the crankcase ventilation pipe and the air filtering air pipe and the inner wall of the air filtering air pipe. Along with the increase of the driving time, after more than four hours, the intersection of the crank pipeline and the air filtering air pipe is completely blocked, at the moment, the pressure of a crankcase rises, an engine oil seal is separated, and the vehicle is anchored.
The schemes adopted by the existing engine system, such as the scheme of adding a liquid accumulation box to an air filtering air pipe, the scheme of thickening a crankcase ventilation pipe pipeline, the scheme of adding foamed heat insulation cotton to the crankcase ventilation pipe and the like, can only delay the icing time, and the icing problem still occurs when a vehicle continuously runs for more than four hours. If the electric heating scheme that the electric heater is additionally arranged on the air filtering air pipe and the joint of the crank pipe is adopted, the problem of icing in the crank pipe can only be solved, the heated air and the cold air of the air filtering air pipe are converged, condensed water still can be separated out and attached to the pipe wall, ice blocks fall off after a long time, and the blades of the supercharger can be damaged. Therefore, the icing problem of the crankcase breather pipe cannot be solved fundamentally by the existing technical scheme.
Disclosure of Invention
The invention aims to provide an engine system, a vehicle provided with the engine system and a method for preventing a crankcase ventilation pipe in the engine system from icing so as to solve the problem of icing of the crankcase ventilation pipe of the vehicle in winter.
In order to achieve the above object, the present disclosure provides an engine system, including a crankcase ventilation pipe, an air cleaner, and an air filtering air pipe connected between the air cleaner and a crankcase, where one end of the crankcase ventilation pipe is connected to the crankcase, and the other end of the crankcase ventilation pipe is connected to the air filtering air pipe, a heating element is disposed inside the air cleaner, and the heating element is configured to heat gas entering the air cleaner when an external environment temperature is less than or equal to 0 ℃ and a gas temperature at an interface between the crankcase ventilation pipe and the air filtering air pipe is less than a gas temperature inside the crankcase ventilation pipe, so that the gas temperature at the interface between the crankcase ventilation pipe and the air filtering air pipe is greater than or equal to the gas temperature inside the crankcase ventilation pipe.
Optionally, the heating assembly comprises a plate body and heating wires arranged on the plate body, and the plate body is rotatably fixed on the shell of the air filter through a rotating shaft.
Optionally, when the external ambient temperature is less than or equal to 0 ℃ and the gas temperature at the interface of the crankcase ventilation pipe and the air filtering gas pipe is less than the gas temperature inside the crankcase ventilation pipe, the plate body rotates to a first position, and the heating wire works to heat the gas entering the air filter, wherein in the first position, the plate body is in a horizontal state;
when the external environment temperature is greater than 0 ℃, the plate body rotates to a second position, the heating wire does not work, wherein the plate body is in a vertical state at the second position.
Optionally, the engine system further comprises a first temperature detection piece for detecting the temperature of the external environment, a second temperature detection piece for detecting the temperature of the gas inside the crankcase ventilation pipe, a third temperature detection piece for detecting the temperature of the gas at the interface between the crankcase ventilation pipe and the air filtering gas pipe, and a controller, wherein the first temperature detection piece, the second temperature detection piece and the third temperature detection piece are respectively in signal connection with the controller.
Optionally, a driving motor for controlling the heating assembly to work is arranged outside the air filter, and the driving motor is connected to the controller through a wire harness.
Optionally, the first temperature detection element is arranged outside a housing of the air cleaner, the second temperature detection element is arranged on an outer pipe wall of the crankcase ventilation pipe, and the third temperature detection element is arranged at a pipe joint of the crankcase ventilation pipe and the air filter gas pipe.
Optionally, the first temperature detection element, the second temperature detection element and the third temperature detection element are all temperature sensors.
According to a second aspect of the present disclosure, a vehicle is provided comprising an engine system according to the above.
According to a third aspect of the present disclosure, there is provided a method of preventing icing of a crankcase ventilation duct in an engine system, wherein the engine system includes the crankcase ventilation duct, an air cleaner, and an air filtrate duct connected between the air cleaner and a crankcase, one end of the crankcase ventilation duct is connected to the crankcase, and the other end is connected to the air filtrate duct, the method comprising:
acquiring the temperature of the external environment;
when the outside environment temperature is less than or equal to 0 ℃, acquiring the gas temperature inside the crankcase ventilation pipe and the gas temperature at the interface of the crankcase ventilation pipe and the air filtering gas pipe;
and when the temperature of the gas at the interface of the crankcase ventilation pipe and the air filtering air pipe is lower than the temperature of the gas in the crankcase ventilation pipe, heating the gas entering the air filter until the temperature of the gas at the interface of the crankcase ventilation pipe and the air filtering air pipe is higher than or equal to the temperature of the gas in the crankcase ventilation pipe.
Optionally, a heating assembly is arranged inside the air cleaner, the heating assembly comprises a plate body rotatably arranged on the shell of the air cleaner and a heating wire arranged on the plate body, wherein the method comprises the following steps:
when the temperature of the gas at the interface of the crankcase ventilation pipe and the air filtering gas pipe is lower than the temperature of the gas inside the crankcase ventilation pipe, the plate body is controlled to rotate to the first position, and the electric heating wire is controlled to heat the gas entering the air filter.
Through the technical scheme, when the temperature of the external environment is less than or equal to 0 ℃, if the temperature of the external air entering the joint of the crankcase ventilation pipe and the air filtering air pipe through the air filter is less than the temperature of the blowby gas in the crankcase ventilation pipe, the heating assembly is started to heat the external air entering the air filter, at the moment, the gas in the external atmosphere flows through the heating assembly in the air filter through the air inlet pipe of the air filter and is heated, the temperature difference between the atmosphere and the gas in the crankcase ventilation pipe is reduced, the temperature of the gas reaching the joint of the crankcase ventilation pipe and the air filtering air pipe is greater than or equal to the temperature of the blowby gas in the crankcase ventilation pipe, the blowby gas in the crankcase ventilation pipe is ensured not to be condensed into ice due to precipitation of water drops when meeting cold, and the problem of icing of the vehicle crankcase ventilation pipe in winter is thoroughly solved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic block diagram of an engine system provided in an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic block diagram illustration of an engine system in a first state according to an exemplary disclosed embodiment;
FIG. 3 is a schematic block diagram illustration of an engine system in a second state provided by an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic illustration of an internal configuration of an air cleaner in an engine system provided by an exemplary embodiment of the present disclosure.
Description of the reference numerals
10-a crankcase ventilation pipe, 20-an air filter, 30-a crankcase, 40-an air filtering air pipe, 50-a heating component, 51-a plate body, 52-a heating wire, 53-a rotating shaft, 61-a first temperature detection piece, 62-a second temperature detection piece, 63-a third temperature detection piece, 70-a controller and 80-a driving motor.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, the use of directional terms such as "inner" and "outer" means inner and outer of the corresponding component profiles, unless otherwise specified. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
Referring to fig. 1, an embodiment of the present disclosure provides an engine system including a crankcase ventilation duct 10, an air cleaner 20, and an air filtering air duct 40 connected between the air cleaner 20 and a crankcase 30, wherein one end of the crankcase ventilation duct 10 may be connected to the crankcase 30, and the other end may be connected to the air filtering air duct 40, so that air escaping from the crankcase 30 may return to a cylinder for re-combustion via the air filtering air duct 40, and is prevented from being discharged to the atmosphere to cause pollution. Referring to fig. 2 and 3, a heating element 50 may be disposed inside the air cleaner 20, and the heating element 50 may be configured to heat the gas entering the air cleaner 20 when the external ambient temperature is less than or equal to 0 ℃ and the gas temperature at the interface between the crankcase ventilation pipe 10 and the air filter gas pipe 40 is less than the gas temperature inside the crankcase ventilation pipe 10, so that the gas temperature at the interface between the crankcase ventilation pipe 10 and the air filter gas pipe 40 is greater than or equal to the gas temperature inside the crankcase ventilation pipe 10. Therefore, when two air flows from the interface of the crankcase ventilation pipe 10 and the air filtering air pipe 40 and the inside of the crankcase ventilation pipe 10 meet, strong heat exchange can not be generated, so that the phenomenon that water vapor is separated out and condensed into ice can not occur, a vehicle can run for a long time in a severe cold area, and the phenomena that the crankcase ventilation pipe is frozen and the oil seal of an engine is separated out are avoided.
Here, in general, water reaches the freezing point at 0 ℃ and starts to freeze, that is, water is in a liquid state at 0 ℃ or higher, in a solid state at 0 ℃ or lower, and in an ice-water mixture state at 0 ℃. When the external environment temperature is less than or equal to 0 ℃, if the gas temperature at the interface of the crankcase ventilation pipe 10 and the air filtering air pipe 40 is less than the gas temperature inside the crankcase ventilation pipe 10, the hot air blown out from the crankcase ventilation pipe 10 meets the cold air at the interface of the crankcase ventilation pipe 10 and the air filtering air pipe 40, water drops are separated out, and the temperature at the junction is most likely to be less than or equal to 0 ℃ (for example, in the cold north in winter), so the separated water drops can be condensed into ice, and the crankcase ventilation pipe is frozen; if the temperature of the gas at the interface between the crankcase ventilation pipe 10 and the air filtering air pipe 40 is greater than or equal to the temperature of the gas inside the crankcase ventilation pipe 10, the temperature of the gas blown out by the crankcase ventilation pipe 10 is usually greater than 0 ℃, for example, about 5 ℃, so that the problem that the condensed water is separated out when the hot air is cooled does not occur, and the crankcase ventilation pipe does not freeze. When the external environment temperature is higher than 0 ℃, even if the gas temperature at the interface of the crankcase ventilation pipe 10 and the air filtering air pipe 40 is lower than the gas temperature in the crankcase ventilation pipe 10, heat exchange is generated between the crankcase ventilation pipe and the air filtering air pipe, but the crankcase ventilation pipe cannot be frozen because the external temperature is higher than 0 ℃.
In addition, referring to fig. 1 to 3, in an embodiment provided by the present disclosure, the air cleaner 20 may be formed by combining an upper housing and a lower housing, and a filter element may be disposed between the upper housing and the lower housing to filter air, and accordingly, an air filter intake pipe may be connected to the lower housing and an air filter exhaust pipe 40 may be connected to the upper housing. Wherein the heating assembly 50 may be disposed in the lower case.
By the technical scheme, when the temperature of the external environment is less than or equal to 0 ℃, if the temperature of the external air entering the joint of the crankcase ventilation pipe 10 and the air filtering air pipe 40 through the air filter 20 is less than the temperature of the air fleeing from the crankcase ventilation pipe 10, the heating unit 50 is turned on to heat the external air introduced into the air cleaner 20, and the air in the external atmosphere is heated by passing through the heating unit 50 in the air cleaner 20 through the intake pipe of the air cleaner 20, thereby reducing the temperature difference between the atmosphere and the air in the crankcase ventilation pipe 10, so that the temperature of the gases reaching the interface of the crankcase ventilation duct 10 and the filtered air duct 40 is greater than or equal to the temperature of the blow-by gases in the crankcase ventilation duct 10, therefore, the gas which is blown out from the crankcase ventilation pipe 10 can not be cooled to separate out water drops to be condensed into ice, and the problem of icing of the vehicle crankcase ventilation pipe in winter is thoroughly solved.
According to some embodiments, referring to fig. 4, the heating assembly 50 may include a plate body 51 and a heater wire 52 disposed on the plate body 51, the plate body 51 may serve as a carrier of the heater wire 52, and the heater wire 52 may be mainly used to heat the gas inside the air cleaner 20. As an embodiment, referring to fig. 4, the plate body 51 may be rotatably fixed to the housing of the air cleaner 20 by a rotation shaft 53, so that the plate body 51 may have different position states. Among them, the heating assembly 50 may include a plurality thereof to enable rapid heating of the gas.
In the case where the plate body 51 is rotatable about the rotation shaft 53, when the external ambient temperature is less than or equal to 0 ℃ and the temperature of the gas at the interface of the crankcase ventilation duct 10 and the air filter gas duct 40 is less than the temperature of the gas inside the crankcase ventilation duct 10, referring to fig. 2, the plate body 51 may be rotated to the first position, and the heating wire 52 may be operated to heat the gas entering the air cleaner 20; when the external ambient temperature is greater than 0 ℃, referring to fig. 3, the plate body 51 may be rotated to the second position, and the heating wire 52 may be deactivated. The first position may be, for example, a position where the plate body 51 is in a horizontal state, and the second position may be, for example, a position where the plate body 51 is in a vertical state. When the plate bodies 51 are in a horizontal position, the plurality of plate bodies 51 may substantially fill the internal horizontal space defined by the housing of the air cleaner 20, so that the gas may be sufficiently heated; accordingly, when the plate body 51 is in the vertical position, the intake resistance of the engine system can be reduced to reduce the influence on the normal operation of the engine system. Both "horizontal" and "vertical" are defined herein with reference to the air cleaner 20, i.e., the plate body 51 is in a horizontal state or a vertical state with respect to its housing wall plate inside the air cleaner 20.
According to some embodiments, referring to fig. 1 to 3, the engine system may further include a first temperature detecting member 61, a second temperature detecting member 62, a third temperature detecting member 63, and a controller 70. The first temperature detector 61 may be used to detect the ambient temperature, the second temperature detector 62 may be used to detect the gas temperature inside the crankcase ventilation duct 10, and the third temperature detector 63 may be used to detect the gas temperature at the interface between the crankcase ventilation duct 10 and the air filter duct 40. The first temperature detecting element 61, the second temperature detecting element 62, and the third temperature detecting element 63 may be respectively in signal connection with the controller 70, so as to transmit the temperature information detected by the first temperature detecting element 61, the second temperature detecting element 62, and the third temperature detecting element 63 to the controller 70, and perform corresponding processing on the detected temperature information through the controller 70.
Further, referring to fig. 1 to 3, the outside of the air cleaner 20 may be provided with a driving motor 80 for controlling the operation of the heating assembly 50, and the driving motor 80 may be connected to the controller 70 through a wire harness. In this way, when the first temperature detecting member 61 detects that the external environment temperature is less than or equal to 0 ℃ and the temperature detected by the third temperature detecting member 63 is less than the temperature detected by the second temperature detecting member 62, the controller 70 may control the driving motor 80 to operate, and the driving motor 80 may drive the heating assembly 50 to operate to heat the air introduced into the air cleaner 20. As an embodiment, when the first temperature detecting member 61 detects that the external environment temperature is less than or equal to 0 ℃ and the temperature detected by the third temperature detecting member 63 is less than the temperature detected by the second temperature detecting member 62, the driving motor 80 may drive the plate body 51 to rotate to the first position, and may control the operation of the heating wire 52; when the first temperature detecting member 61 detects that the external environment temperature is greater than 0 ℃, the driving motor 80 may drive the plate body 51 to rotate to the second position, and may control the heating wire 52 not to work. In the embodiment provided by the present disclosure, the same driving member is used for the rotation of the plate body 51 and the operation of the heating wire 52, and in other embodiments, two different driving members may be used for the rotation of the plate body 51 and the operation of the heating wire 52, respectively, which is not limited in the present disclosure.
In order to enable each temperature detection member to accurately detect temperature information of a corresponding position of the engine system, referring to fig. 1 to 3, a first temperature detection member 61 may be disposed outside a housing of the air cleaner 20, a second temperature detection member 62 may be disposed on an outer pipe wall of the crankcase ventilation pipe 10, and a third temperature detection member 63 may be disposed at a pipe joint of the crankcase ventilation pipe 10 and the air filter ventilation pipe 40. Here, the first temperature detecting member 61 may be disposed at another position such as an air intake filter pipe, which can detect the temperature of the external environment.
In addition, according to some embodiments, the first temperature detecting member 61, the second temperature detecting member 62, and the third temperature detecting member 63 may each be a temperature sensor.
According to a second aspect of the present disclosure, a vehicle is provided, wherein the vehicle may comprise the engine system described above. The vehicle has all the benefits of the engine system described above and will not be described in detail here.
The disclosed embodiments also provide a method of preventing icing of crankcase ventilation ducts in an engine system that may include a crankcase ventilation duct 10, an air cleaner 20, and an air filtrate duct 40 connected between the air cleaner 20 and a crankcase 30, where one end of the crankcase ventilation duct 10 may be connected to the crankcase 30 and the other end may be connected to the air filtrate duct 40. Wherein, the method can comprise the following steps: acquiring the temperature of the external environment; when the external environment temperature is less than or equal to 0 ℃, acquiring the gas temperature inside the crankcase ventilation pipe 10 and the gas temperature at the interface of the crankcase ventilation pipe 10 and the air filtering gas pipe 40; when the temperature of the gas at the interface of the crankcase ventilation duct 10 and the air filter gas duct 40 is lower than the temperature of the gas inside the crankcase ventilation duct 10, the gas entering the air cleaner 20 is heated until the temperature of the gas at the interface of the crankcase ventilation duct 10 and the air filter gas duct 40 is higher than or equal to the temperature of the gas inside the crankcase ventilation duct 10.
Like this, through obtaining the ambient temperature, the inside gas temperature of crankcase ventilation pipe 10 and the gas temperature of crankcase ventilation pipe 10 and empty gas filtering pipe 40 kneck, can be less than or equal to 0 ℃ and when the gas temperature when crankcase ventilation pipe 10 and empty gas filtering pipe 40 kneck is less than the temperature of scurrying out gas in the crankcase ventilation pipe 10, in time heat the ambient gas that enters into air cleaner 20, the temperature that makes gas reach crankcase ventilation pipe 10 and empty gas filtering pipe 40 kneck is greater than or equal to the temperature of scurrying out gas in the crankcase ventilation pipe 10, thereby guarantee that the gas of scurrying out in the crankcase ventilation pipe 10 can not meet the cold precipitation water droplet and condense into ice, thoroughly solve the frozen problem of vehicle crankcase ventilation pipe in winter. The method for preventing the icing of the crankcase ventilation pipe in the engine system can heat the air entering the air filter 20 according to the ambient temperature of the vehicle, thereby changing the gas temperature, reducing the temperature difference between the atmospheric temperature and the gas temperature in the crankcase ventilation pipe 10, ensuring that the temperature of the atmosphere reaching the crankcase ventilation pipe 10 is more than or equal to the temperature of the gas fleeing from the crankcase ventilation pipe 10, ensuring that no strong heat exchange exists when two air flows meet, no water is separated out and condensed into ice, ensuring that the vehicle can run for a long time in a severe cold area, and avoiding the phenomena of the icing of the crankcase ventilation pipe and the oil seal removal of the engine. The external environment temperature is less than or equal to 0 ℃ and can be the working condition that the vehicle runs in an extremely cold low-temperature area, and the external environment temperature is more than 0 ℃ and can be the working condition that the vehicle runs in a normal area.
Further, the heating assembly 50 may be disposed inside the air cleaner 20, and the heating assembly 50 may include a plate body 51 rotatably disposed on the housing of the air cleaner 20 and a heating wire 52 disposed on the plate body 51, wherein when the temperature of the gas at the interface between the crankcase ventilation pipe 10 and the air filter gas pipe 40 is lower than the temperature of the gas inside the crankcase ventilation pipe 10, the method for preventing the crankcase ventilation pipe from freezing may further include controlling the plate body 51 to rotate to the first position and controlling the heating wire 52 to heat the gas entering the air cleaner 20. That is, the heating of the gas may be achieved by the heating assembly 50 (specifically, the heating wire 52) provided in the air cleaner 20. The first position may be, for example, a position in which the plate body 51 is in a horizontal state, and when the plate body 51 is in the horizontal position, the plurality of plate bodies 51 may be substantially distributed throughout an inner horizontal space defined by the case of the air cleaner 20, so that the gas may be sufficiently heated.
Here, as an embodiment, the engine system in the method of preventing icing of a crankcase ventilation duct in the engine system may be the engine system provided in the above-described embodiment of the present disclosure, and the method may have various configurations and corresponding advantageous effects in the above-described engine system. In this case, the specific implementation process of the method may include:
the controller 70 controls the first temperature detection part 61 to work so as to obtain the external environment temperature in real time;
when the first temperature detecting element 61 detects that the outside environment temperature is less than or equal to 0 ℃, the controller 70 controls the second temperature detecting element 62 and the third temperature detecting element 63 to work so as to obtain the gas temperature inside the crankcase ventilation pipe 10 and the gas temperature at the interface between the crankcase ventilation pipe 10 and the air filtering gas pipe 40;
when the temperature value detected by the third temperature detecting member 63 is less than the temperature value detected by the second temperature detecting member 62, the controller 70 controls the driving motor 80 to operate, the driving motor 80 drives the plate body 51 of the heating assembly 50 to rotate to the first position and controls the heating wire 52 to heat the air entering the air cleaner 20 until the temperature value detected by the third temperature detecting member 63 is greater than or equal to the temperature value detected by the second temperature detecting member 62.
When the first temperature detecting element 61 detects that the external environment temperature is greater than 0 ℃, the controller 70 controls the second temperature detecting element 62 and the third temperature detecting element 63 not to operate, and at the same time, the controller 70 may control the driving motor 80 to operate, and the driving motor 80 drives the plate body 52 of the heating assembly 50 to rotate to the second position and controls the heating wire 52 not to operate.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. An engine system, comprising a crankcase ventilation pipe (10), an air filter (20) and an air filtering air pipe (40) connected between the air filter (20) and a crankcase (30), wherein one end of the crankcase ventilation pipe (10) is connected to the crankcase (30), and the other end of the crankcase ventilation pipe is connected to the air filtering air pipe (40), characterized in that a heating component (50) is arranged inside the air filter (20), the heating component (50) is configured to heat gas entering the air filter (20) when the external environment temperature is less than or equal to 0 ℃ and the gas temperature at the interface of the crankcase ventilation pipe (10) and the air filtering air pipe (40) is less than the gas temperature inside the crankcase ventilation pipe (10), so that the gas temperature at the interface of the crankcase ventilation pipe (10) and the air filtering air pipe (40) is greater than or equal to the gas temperature at the interface of the crankcase ventilation pipe (20) The temperature of the gas inside the ventilation pipe (10).
2. The engine system according to claim 1, characterized in that the heating assembly (50) comprises a plate (51) and heating wires (52) arranged on the plate (51), the plate (51) being rotatably fixed to the housing of the air cleaner (20) by means of a rotating shaft (53).
3. The engine system of claim 2,
when the outside environment temperature is less than or equal to 0 ℃ and the gas temperature at the interface of the crankcase ventilation pipe (10) and the air filtering gas pipe (40) is less than the gas temperature inside the crankcase ventilation pipe (10), the plate body (51) rotates to a first position, and the heating wire (52) works to heat the gas entering the air filter (20), wherein in the first position, the plate body (51) is in a horizontal state;
when the external environment temperature is higher than 0 ℃, the plate body (51) rotates to a second position, the heating wire (52) does not work, and in the second position, the plate body (51) is in a vertical state.
4. The engine system according to claim 1, characterized in that the engine system further comprises a first temperature detecting element (61) for detecting the temperature of the external environment, a second temperature detecting element (62) for detecting the temperature of the gas inside the crankcase ventilation pipe (10), a third temperature detecting element (63) for detecting the temperature of the gas at the interface between the crankcase ventilation pipe (10) and the air filtering gas pipe (40), and a controller (70), wherein the first temperature detecting element (61), the second temperature detecting element (62) and the third temperature detecting element (63) are respectively in signal connection with the controller (70).
5. An engine system according to claim 4, characterized in that the outside of the air cleaner (20) is provided with a drive motor (80) for controlling the operation of the heating assembly (50), the drive motor (80) being connected to the controller (70) by a wire harness.
6. An engine system according to claim 4, characterized in that the first temperature detection element (61) is arranged outside the housing of the air cleaner (20), the second temperature detection element (62) is arranged on the outer pipe wall of the crankcase ventilation pipe (10), and the third temperature detection element (63) is arranged at the junction of the crankcase ventilation pipe (10) and the air filter gas pipe (40).
7. The engine system according to claim 4, characterized in that the first temperature detecting member (61), the second temperature detecting member (62), and the third temperature detecting member (63) are all temperature sensors.
8. A vehicle, characterized by comprising an engine system according to any one of claims 1-7.
9. A method of preventing icing of crankcase ventilation ducts in an engine system, wherein the engine system comprises a crankcase ventilation duct (10), an air cleaner (20) and an air filtrate duct (40) connected between the air cleaner (20) and a crankcase (30), and wherein the crankcase ventilation duct (10) is connected at one end to the crankcase (30) and at the other end to the air filtrate duct (40), the method comprising:
acquiring the temperature of the external environment;
when the outside environment temperature is less than or equal to 0 ℃, acquiring the gas temperature inside the crankcase ventilation pipe (10) and the gas temperature at the interface of the crankcase ventilation pipe (10) and the air filtering gas pipe (40);
when the temperature of the gas at the interface of the crankcase ventilation pipe (10) and the air filtering gas pipe (40) is lower than the temperature of the gas inside the crankcase ventilation pipe (10), heating the gas entering the air filter (20) until the temperature of the gas at the interface of the crankcase ventilation pipe (10) and the air filtering gas pipe (40) is higher than or equal to the temperature of the gas inside the crankcase ventilation pipe (10).
10. The method according to claim 9, wherein a heating assembly (50) is provided inside the air cleaner (20), the heating assembly (50) including a plate body (51) rotatably provided on a housing of the air cleaner (20) and heating wires (52) arranged on the plate body (51), wherein the method includes:
when the temperature of the gas at the interface of the crankcase ventilation pipe (10) and the air filtering gas pipe (40) is lower than the temperature of the gas inside the crankcase ventilation pipe (10), the plate body (51) is controlled to rotate to the first position and the heating wire (52) is controlled to heat the gas entering the air filter (20).
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| CN202110282888.2A CN114592994B (en) | 2021-03-16 | 2021-03-16 | Vehicle, engine system and method for preventing crankcase ventilation pipe from icing |
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| CN114592994B (en) | 2023-04-11 |
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