CN114658574A - Engine air inlet system, control method thereof and vehicle - Google Patents
Engine air inlet system, control method thereof and vehicle Download PDFInfo
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- CN114658574A CN114658574A CN202110492347.2A CN202110492347A CN114658574A CN 114658574 A CN114658574 A CN 114658574A CN 202110492347 A CN202110492347 A CN 202110492347A CN 114658574 A CN114658574 A CN 114658574A
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- intercooler
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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
- F02M35/1015—Air intakes; Induction systems characterised by the engine type
- F02M35/10157—Supercharged engines
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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
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0493—Controlling the air charge temperature
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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
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10255—Arrangements of valves; Multi-way valves
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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
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10268—Heating, cooling or thermal insulating means
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Supercharger (AREA)
Abstract
The present disclosure relates to an engine air intake system, a control method thereof and a vehicle, wherein the engine air intake system comprises a first air intake pipeline for receiving ambient air; a second intake conduit for receiving ambient air and disposed at an exhaust flow path of the engine; the first three-way electric control valve is connected among the first air inlet pipeline, the second air inlet pipeline and the air filter; the crankcase ventilation pipe is connected between a crankcase of the engine and the air filtering air pipe; the air filter air pipe is connected to one end of the supercharger; and the controller is connected with the first three-way electric control valve. There is heat radiation around the engine exhaust flow path, thereby can heat the air in the second air inlet pipeline to the used heat and recycle, improve the inlet air temperature of second air inlet pipeline, through the opening dynamics of the electrically controlled valve of controller control first tee bend, the adjustment is respectively from the air input of second air inlet pipeline and first air inlet pipeline, the promotion of booster inlet air temperature to solve the frozen problem of crankcase ventilation pipe.
Description
Technical Field
The disclosure relates to the field of automobiles, in particular to an engine air inlet system, a control method thereof and a vehicle.
Background
With the development of economy, the living standard of people is continuously improved, and automobiles enter thousands of households. China is wide in territory, the temperature difference between the south and the north is great, and the energy required by the air intake at extremely low temperature is increased, so that the fuel consumption is increased. The increase of fuel consumption means that the comprehensive performance of environmental protection, energy conservation and efficiency is weakened. For example, the crankcase gas coming out of the ventilation pipe of the crankcase of the traveling crane in the high and cold environment is at the intersection with the air inlet pipe of the engine, because cold and hot air is accumulated, the crankcase gas is easy to freeze to block, and the problems that the engine loses power and the like due to oil seal falling, oil leakage, engine oil emulsification and the like can be caused in the process.
Disclosure of Invention
An object of the present disclosure is to provide an engine intake system and a vehicle to at least partially solve the problems in the prior art.
In order to achieve the above object, the present disclosure provides an engine intake system comprising: a first air intake conduit for receiving ambient air; a second intake conduit for receiving ambient air and disposed at an exhaust flow path of the engine; the first three-way electric control valve is connected among the first air inlet pipeline, the second air inlet pipeline and the air filter; a crankcase ventilation pipe connected between a crankcase of the engine and an air filtering air pipe; the air filtering air pipe is connected to one end of the supercharger; and the controller is connected with the first three-way electric control valve.
Optionally, the engine air intake system further comprises: the intercooler is connected to the downstream of the supercharger, and the other end of the intercooler is connected to the engine; an intake bypass connected in parallel with the intercooler; and the second three-way electric control valve is connected among the supercharger, the intercooler and the air inlet bypass, and the controller is connected with the second three-way electric control valve.
Optionally, the engine intake system further comprises a first detection element disposed downstream of the junction of the crankcase ventilation duct and the air filter duct and upstream of the supercharger, and the controller is connected to the first detection element.
Optionally, the engine air intake system further includes a second detection element disposed between the intercooler and the engine, and the controller is connected to the second detection element.
Alternatively, a throttle valve is provided at a position where the intercooler is connected to the engine, and the second detection element is provided upstream of the throttle valve.
Optionally, the first detection element and the second detection element are temperature and humidity sensors, respectively.
According to still another aspect of the present disclosure, there is also provided a control method of an engine intake system, the control method including: controlling the first three-way electronic control valve in response to the acquired air inlet temperature of the supercharger by the first detection element so as to improve the air inlet temperature of the supercharger; and
and controlling the second three-way electric control valve in response to the air outlet temperature of the intercooler acquired by the second detection element so as to improve the air outlet temperature of the intercooler.
Alternatively, in the step of increasing the intake air temperature of the supercharger,
when the intake air temperature of the supercharger acquired by the first detection element is lower than a first preset value T1When the first three-way electric control valve is opened, the controller controls the first three-way electric control valve to increase the air inflow of the second air inlet pipeline and reduce the air inflow of the first air inlet pipeline;
when the intake air temperature of the supercharger acquired by the first detection element is lower than a second preset value T2When the first three-way electric control valve is closed, the controller controls the first three-way electric control valve to close the second air inlet pipeline and close the first air inlet pipeline, wherein the first preset value T is set1Greater than the second predetermined value T2；
Optionally, in the step of increasing the outlet air temperature of the intercooler,
when the second detecting element is detectedThe outlet air temperature of the cooler is lower than a third preset value T3When the air conditioner is started, the controller controls the second three-way electric control valve to increase the air inflow of the air inlet bypass and reduce the air inflow of a pipeline connected with the intercooler;
when the outlet air temperature of the intercooler obtained by the second detection element is lower than a fourth preset value T4When the air conditioner is started, the controller controls the second three-way electric control valve to switch on the air inlet bypass and cut off a pipeline connected with the intercooler, wherein the third preset value T is set3> said fourth predetermined value T4。
According to still another aspect of the present disclosure, there is also provided a vehicle including the engine intake system according to the above.
Through the technical scheme, because the heat radiation exists around the engine exhaust flow path, the engine air inlet system can reuse waste heat through the second air inlet pipeline to heat the air around, the temperature of the air inlet in the second air inlet pipeline is higher than that of the air inlet in the first air inlet pipeline, and the temperature of the air at the air inlet end of the supercharger can be improved after the second air inlet pipeline is converged with the first air inlet pipeline. The opening degree of the first three-way electric control valve is controlled by the controller to adjust the air input of the second air inlet pipeline and the first air inlet pipeline, and the problem of icing of a ventilation pipe of a crankcase can be solved by increasing the air inlet temperature. Specifically, by adjusting the valve opening of the first three-way electric control valve, the air inflow of the second air inlet pipeline is larger, the air inflow of the first air inlet pipeline is smaller, and the air temperature at the air inlet end of the supercharger is higher; when the high-temperature gas does not need to be provided, the air inflow of the second air inlet pipeline can be adjusted to be small, and meanwhile, the air inflow of the first air inlet pipeline is increased.
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 illustration of an engine air intake system according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of the engine and intercooler cycle portion based on fig. 1.
FIG. 3 is a flow chart of an engine air intake system control method according to one embodiment of the present disclosure.
FIG. 4 is a flow chart of an engine air intake system control method according to another embodiment of the present disclosure.
Description of the reference numerals
10-a controller; 11-a first detection element; 12-a second detection element; 21-a first inlet line; 22-a second intake line; 3-a first three-way electric control valve; 4-a second three-way electric control valve; 5-an intake bypass; 6-an intercooler; 7-an air filter; 71-air filtering out the air pipe; 8-an engine; 81-a supercharger; 82-an exhaust gas flow path; 83-crankcase; 831-crankcase ventilation duct; 84-a throttle valve; 9-the junction.
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, unless otherwise stated, directional terms such as "upstream" and "downstream" are used in a sequence according to the actual flow direction of intake air in the engine intake system, and the flow direction of air in the engine intake system may specifically refer to the direction indicated by the arrows in fig. 1 and 2, and the terms "first" and "second" are used for distinguishing different components and are not sequential or significant. Furthermore, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, unless otherwise explained.
According to an embodiment of the present disclosure, there is provided an engine intake system, as shown in fig. 1 and 2, that includes a first intake line 21, a second intake line 22, a first three-way electronically controlled valve 3, a crankcase ventilation pipe 831, an air cleaner 7, a supercharger 81, and a controller 10. The first air inlet pipeline 21 is used for receiving ambient air, the second air inlet pipeline 22 is used for receiving ambient air and is arranged at an exhaust flow path 82 of the engine 8, the first three-way electronic control valve 3 is connected among the first air inlet pipeline 21, the second air inlet pipeline 22 and the air filter 7, wherein the air inflow of the first air inlet pipeline 21 and the second air inlet pipeline 22 can be selectively adjusted by adjusting the valve opening degree of the first three-way electronic control valve 3, the inlet air from the first air inlet pipeline 21 and the second air inlet pipeline 22 is conveyed to the air filter 7, and then the temperature of the air in the air filtering air pipe 71 can be adjusted. A crankcase ventilation pipe 831 may be connected between the crankcase 83 of the engine 8 and the air filtrate pipe 71 at the output of the air cleaner 7 for passing the blow-by gas from the crankcase 83 to the air filtrate pipe 71. Meanwhile, the other end of the air filtering air pipe 71 is connected to the supercharger 81. The controller 10 is connected to the first three-way electric control valve 3 for controlling the air intake amount of the first air intake pipeline 21 and the second air intake pipeline 22 to adjust the air intake temperature of the supercharger 81.
Because the driving in-process, the crankcase gas that comes out in the crankcase ventilation pipe 831 of engine, with empty filter out the inspiratory gas of trachea 71 and intersect 9, if the gas temperature of the intersection 9 of crankcase ventilation pipe 831 and empty filter out trachea 71 is less than the inside gas temperature of crankcase ventilation pipe 831, the crankcase gas can liquefy into the water droplet and gather at intersection 9, and when ambient temperature was lower, the temperature of intersection 9 probably is less than or equal to 0 ℃, the water droplet that gathers at intersection 9 this moment can solidify for crankcase ventilation pipe 831 takes place the phenomenon of freezing, this phenomenon easily leads to this intersection 9 to freeze to blocking up.
Through the above technical scheme of this disclosure, because there is heat radiation around the engine exhaust flow path 82, thereby the engine air intake system can be through second air inlet pipeline 22 to the peripheral air of waste heat recycling heating, the temperature of admitting air in the second air inlet pipeline 22 is greater than the admission air in the first air inlet pipeline 21, second air inlet pipeline 22 can improve the gas temperature of empty gas escape pipe 71 that strains after joining with first air inlet pipeline 21. The controller 10 controls the opening force of the first three-way electric control valve 3 to adjust the air input of the second air inlet pipeline 22 and the first air inlet pipeline 21, and the problem of icing of the crankcase ventilation pipe 831 can be solved by increasing the air inlet temperature. Specifically, by adjusting the valve opening of the first three-way electronic control valve 3, the larger the air intake amount of the second air intake pipeline 22 is, the smaller the air intake amount of the first air intake pipeline 21 is, so that the higher the air temperature of the air filtering air pipe 71 is; and when the supply of high-temperature gas is not required, the intake air amount of the second intake pipe 22 may be adjusted small while the intake air amount of the first intake pipe 21 is increased.
Further, as shown in fig. 1 and fig. 2, the engine intake system may further include a second three-way electronic control valve 4 and an intercooler 6 sequentially disposed downstream of the supercharger 81, the second three-way electronic control valve 4 is connected to an intake bypass 5 connected in parallel with the intercooler 6, and the controller 10 is connected to the second three-way electronic control valve 4 to control the flow of the gas flowing through the intercooler 6.
Therefore, the controller 10 can control the second three-way electric control valve 4 to control the participation degree of the intercooler 6, the intercooler 6 is connected with the air inlet bypass 5 in parallel, and when the air temperature is low, the controller 10 can control the second three-way electric control valve 4 to increase the air inlet amount of the air inlet bypass 5 and reduce the air inlet participation degree of the intercooler 6; when the air temperature is below the limit value, the second three-way electronically controlled valve 4 may close the intake of the intercooler 6, allowing air to enter the engine 8 directly from the intake bypass 5. On the contrary, when the air temperature is high, the air inflow of the intercooler 6 is increased, and the air inflow participation degree of the air inlet bypass 5 is reduced, so that the engine 8 can work efficiently, energy-efficiently and environmentally-friendly under different atmospheric temperature conditions, and the problems of fuel consumption increase and environmental protection, energy conservation and efficiency reduction of a vehicle caused by too low suction temperature of the engine 8 are solved.
Further, as shown in fig. 1 and 2, the engine intake system may further include a first detection element 11, the first detection element 11 may be disposed downstream of the junction 9 of the crankcase ventilation pipe 831 and the air filter gas pipe 71 and upstream of the supercharger 81, and the controller 10 may be connected to the first detection element 11 to control the first three-way electrically controlled valve 3 by data detected by the first detection element 11. The first detection element 11 can be used for monitoring various numerical values of air near the intersection 9 in real time, when the numerical values reach the set value of the first detection element 11, the first detection element 11 transmits an electric signal to the controller 10, and the air inlet condition before the pressurization of the engine air inlet system is controlled through the controller 10, so that the automation of air inlet regulation is realized.
Further, as shown in fig. 1, a second detection element 12 may be disposed between the intercooler 6 and the engine 8, and the controller 10 is connected to the second detection element 12 to control the second three-way electrically controlled valve 4 according to data detected by the second detection element 12. The second detecting element 12 can be used to monitor various values of the air nearby in real time, when the values reach the set values of the second detecting element 12, the second detecting element 12 transmits the electric signal to the controller 10, and the intake condition after the engine intake system is pressurized is controlled by the controller 10.
Further, as shown in fig. 1 and 2, a throttle valve 84 is provided at a position where the intercooler 6 is connected to the engine 8, and the second detecting member 12 is provided upstream of the throttle valve 84. The arrangement mode can enable the second detection element 12 to monitor the air temperature and the air humidity near the throttle valve 84 more accurately, so that the controller 10 controls the second three-way electric control valve 4 to control the air intake participation of the intercooler 6 and the air intake bypass 5 more accurately, and the air intake temperature of the engine 8 is controlled, and the problem that the throttle valve 84 is frozen and stuck due to low temperature is solved.
Further, the first detecting element 11 and the second detecting element 12 are temperature and humidity sensors, respectively, and the temperature and humidity sensors can better monitor the temperature and humidity values in the air. In other embodiments, a thermocouple, a thermometer, etc. may also be included, all falling within the scope of the present disclosure.
On the basis of the scheme, the disclosure also provides a control method of the engine air inlet system, the engine intake system may be the engine intake system described above, as shown in fig. 3, in the control method, comprising a step 301 of controlling the first three-way electrically controlled valve 3 in response to the intake air temperature of the supercharger 81 acquired by the first detecting element 11 to raise the intake air temperature of the supercharger 81, specifically, in which the actual operation is controlled by transmitting a signal to the controller 10 through the value detected by the first detecting element 11, according to the acquired intake air temperature of the supercharger 81, the controller 10 may control the first three-way electric control valve 3, the air intake amounts of the first air intake pipeline 21 and the second air intake pipeline 22 are correspondingly controlled to increase the air intake temperature of the supercharger 81, so that the problem of icing of the crankcase ventilation pipe 831 caused by low external temperature is solved. The control method further comprises a step 302 of controlling the second three-way electronic control valve 4 in response to the outlet air temperature of the intercooler 6 acquired by the second detection element 12 to increase the outlet air temperature of the intercooler 6, specifically, in the step, a signal is transmitted to the controller 10 to control the actual operation through a value detected by the second detection element 12, the controller 10 can control the second three-way electronic control valve 4 according to the acquired outlet air temperature of the intercooler 6 to correspondingly control the air inlet amount of the air inlet bypass 5 and the intercooler 6, so that the problem that the throttle valve 84 is frozen and stuck due to low temperature is solved by controlling the inlet air temperature of the engine 8, the inlet air temperature before supercharging and the outlet air temperature passing through the intercooler are comprehensively considered, and the inlet air temperature of the engine is increased by simultaneously increasing the two.
Specifically, as shown in fig. 4, the step of increasing the intake air temperature of the supercharger 81 includes a step 4011 of acquiring the temperature of the intake end of the supercharger 81, and a step 4012 of determining whether the intake air temperature of the supercharger 81 is lower than a first preset value T1When it is lower than the first preset value T1In the meantime, step 4013 is executed, the controller 10 controls the first three-way electronic control valve 3 to increase the air intake amount of the second air intake pipeline 22 and decrease the air intake amount of the first air intake pipeline 21, so as to increase the air intake temperature of the supercharger 81 and solve the problem of freezing of the crankcase ventilation pipe 831 due to low temperature outside.
In the step of increasing the intake air temperature of the supercharger 81, after the step 4013, a step 4014 is further included, and it is then determined whether the intake air temperature of the supercharger 81 is lower than a second preset value T2At a first predetermined value T1Greater than a second predetermined value T2In the case where the intake air temperature of the supercharger 81 is lowered to the second preset value T2In time, step 4015 is executed, the controller 10 may control the first three-way electric control valve 3 to connect the second air inlet pipeline 22 and cut off the first air inlet pipeline 21, so as to solve the problem caused by snow or dust and snow weatherThe air cleaner 7 is clogged with snow, and the intake air temperature of the supercharger 81 is further raised. When the intake air temperature of the supercharger 81 is higher than the first preset value T1Or at a first preset value T1And a second preset value T2In between, it indicates that the temperature of the gas before pressurization is not very low, and step 4021 may be directly performed to determine whether the outlet temperature of the intercooler 6 needs to be raised.
Further, as shown in fig. 4, in the step of increasing the outlet temperature of the intercooler 6, a step 4021 is included to obtain the outlet temperature of the intercooler 6, and a step 4022 is included to determine whether the outlet temperature of the intercooler 6 is lower than a third preset value T3When the outlet air temperature of the intercooler 6 is lower than the third preset value T3When the method is used, the step 4023 is executed, the controller 10 can control the second three-way electric control valve 4, the air inflow of the air inlet bypass 5 is increased, and the air inflow of a pipeline connected with the intercooler 6 is reduced, so that the air outlet temperature of the intercooler 6 is improved, and the possibility of icing of an air inlet pipe of the intercooler 6 is reduced. In the step of increasing the outlet air temperature of the intercooler 6, the method further includes a step 4024 of judging whether the outlet air temperature of the intercooler 6 is lower than a fourth preset value T4At a third preset value T3Greater than a fourth preset value T4In case that the outlet temperature of the intercooler 6 is lower than the fourth preset value T4In step 4025, the controller 10 may control the second three-way electronic control valve 4 to connect the intake bypass 5 and cut off the pipeline connected to the intercooler 6. The outlet temperature of the intercooler 6 is higher than a third preset value T3Or at a third preset value T3And a fourth preset value T4Meanwhile, it is stated that the temperature of the gas after the supercharged gas passes through the intercooler 6 is not particularly low, and at this time, step 4026 may be executed, the throttle valve 84 is opened, and the engine enters air through the throttle valve 84, so that the problem of freezing and clamping of the throttle valve 84 due to low temperature is solved by controlling the intake air temperature of the engine 8.
On the basis of the scheme, the vehicle comprises the engine air inlet system, and has all the beneficial effects of the engine air inlet system, and the description is omitted here.
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 air intake system, comprising:
a first intake line (21) for receiving ambient air;
a second intake conduit (22) for receiving ambient air and disposed at an exhaust flow path (82) of the engine (8);
the first three-way electric control valve (3) is connected among the first air inlet pipeline (21), the second air inlet pipeline (22) and the air filter (7);
a crankcase ventilation pipe (831) connected between a crankcase (83) of the engine (8) and the air filter air pipe (71);
a supercharger (81), wherein the air filtering air pipe (71) is connected to one end of the supercharger (81); and
and the controller (10) is connected with the first three-way electric control valve (3).
2. The engine air intake system of claim 1, further comprising:
an intercooler (6) connected downstream of the supercharger (81), the other end of the intercooler (6) being connected to the engine (8);
an intake bypass (5) connected in parallel with the intercooler (6); and
and the second three-way electric control valve (4) is connected among the supercharger (81), the intercooler (6) and the air inlet bypass (5), and the controller (10) is connected with the second three-way electric control valve (4).
3. The engine air intake system of claim 2, further comprising:
a first detection element (11), wherein the first detection element (11) is arranged downstream of the junction (9) of the crankcase ventilation pipe (831) and the air filter gas pipe (71) and upstream of the supercharger (81), and the controller (10) is connected with the first detection element (11).
4. The engine air intake system of claim 3, further comprising:
a second detection element (12) disposed between the intercooler (6) and the engine (8), the controller (10) being connected to the second detection element (12).
5. An engine intake system according to claim 4, characterized in that a throttle valve (84) is provided at a position where the intercooler (6) is connected to the engine (8), and the second detecting member (12) is provided upstream of the throttle valve (84).
6. The engine intake system according to claim 4, characterized in that the first detection element (11) and the second detection element (12) are temperature and humidity sensors, respectively.
7. A control method of an engine intake system, characterized in that the engine intake system is the engine intake system according to claim 4, the control method comprising:
controlling the first three-way electronic control valve in response to the acquired air inlet temperature of the supercharger by the first detection element so as to improve the air inlet temperature of the supercharger; and
and controlling the second three-way electric control valve in response to the air outlet temperature of the intercooler obtained by the second detection element so as to improve the air outlet temperature of the intercooler.
8. The control method of an engine intake system according to claim 7, wherein, in the step of increasing the intake air temperature of the supercharger,
when the intake air temperature of the supercharger acquired by the first detection element is lower than a first preset value T1When the first three-way electric control valve is opened, the controller controls the first three-way electric control valve to increase the air inflow of the second air inlet pipeline and reduce the air inflow of the first air inlet pipeline;
when the intake air temperature of the supercharger acquired by the first detection element is lower than a second preset value T2When the first three-way electric control valve is closed, the controller controls the first three-way electric control valve to close the second air inlet pipeline and close the first air inlet pipeline, wherein the first preset value T is set1Greater than the second predetermined value T2。
9. The engine intake system control method according to claim 7, wherein, in the step of increasing the temperature of the outlet air of the intercooler,
when the outlet air temperature of the intercooler obtained by the second detection element is lower than a third preset value T3When the air inlet bypass is closed, the controller controls the second three-way electric control valve to increase the air inlet amount of the air inlet bypass and reduce the air inlet amount of a pipeline connected with the intercooler;
when the outlet air temperature of the intercooler obtained by the second detection element is lower than a fourth preset value T4When the air conditioner is started, the controller controls the second three-way electric control valve to switch on the air inlet bypass and cut off a pipeline connected with the intercooler, wherein the third preset value T is set3> said fourth predetermined value T4。
10. A vehicle characterized by comprising the engine intake system of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110492347.2A CN114658574A (en) | 2021-05-06 | 2021-05-06 | Engine air inlet system, control method thereof and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110492347.2A CN114658574A (en) | 2021-05-06 | 2021-05-06 | Engine air inlet system, control method thereof and vehicle |
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| Publication Number | Publication Date |
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| CN114658574A true CN114658574A (en) | 2022-06-24 |
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| CN202110492347.2A Pending CN114658574A (en) | 2021-05-06 | 2021-05-06 | Engine air inlet system, control method thereof and vehicle |
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