CN114704409B - Air system and air system control method - Google Patents

Air system and air system control method Download PDF

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Publication number
CN114704409B
CN114704409B CN202210393066.6A CN202210393066A CN114704409B CN 114704409 B CN114704409 B CN 114704409B CN 202210393066 A CN202210393066 A CN 202210393066A CN 114704409 B CN114704409 B CN 114704409B
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China
Prior art keywords
pipeline
valve body
bypass
air inlet
engine
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Active
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CN202210393066.6A
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Chinese (zh)
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CN114704409A (en
Inventor
张朝阳
李会
李光辉
祁同晖
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Priority to CN202210393066.6A priority Critical patent/CN114704409B/en
Publication of CN114704409A publication Critical patent/CN114704409A/en
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Classifications

    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
    • 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
    • F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The application discloses an air system and an air system control method, wherein the air system comprises an EGR system, an engine air inlet pipeline and an engine air outlet pipeline, the EGR system comprises an EGR pipeline communicated between the engine air inlet pipeline and the engine air outlet pipeline, and an EGR cooler and a gas power device are sequentially arranged on the EGR pipeline from the engine air outlet pipeline to the engine air inlet pipeline; and a first bypass pipeline is communicated with an EGR pipeline between the EGR cooler and the aerodynamic device through a first valve body, and the other end of the first bypass pipeline is communicated with an engine air inlet pipeline. The air system further comprises a controller, and the controller is communicated with the bypass pipeline through the valve body under preset working conditions, so that the control of global EGR is realized, the supercharging can be realized in two sets, and the overall dynamic property and the economical efficiency of the vehicle are improved.

Description

Air system and air system control method
Technical Field
The invention belongs to the field of automobiles, and particularly relates to an air system and an air system control method.
Background
High pressure EGR (Exhaust Gas Recirculation EGR) engines in current typical air systems require a dedicated EGR valve to control whether exhaust enters the intake, however, some high EGR rate conditions require the performance of the supercharger to be sacrificed to create an exhaust driven pressure differential, which sacrifices the efficiency of the supercharger and results in fuel consumption degradation. Meanwhile, because the engine needs larger air inflow under the working conditions of low rotation speed and climbing, the traditional turbocharging is difficult to meet the requirement of the dynamic property under the full working condition due to the inherent hysteresis effect.
Therefore, how to actively control the EGR rate, improve the engine performance under the idle working condition and the climbing working condition becomes a technical problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problems of actively controlling the EGR rate, improving the engine performance under the idle working condition and the climbing working condition described in the background art, the application provides an air system and an air system control method.
According to a first aspect, an embodiment of the present application provides an air system, which includes an EGR system, an engine air intake pipe, and an engine air outlet pipe, where the EGR system includes an EGR pipe that is communicated between the engine air intake pipe and the engine air outlet pipe, and an EGR cooler and a gas power device are sequentially disposed on the EGR pipe from the engine air outlet pipe to the engine air intake pipe; a first bypass pipeline is communicated with an EGR pipeline between the EGR cooler and the aerodynamic device through a first valve body, and the other end of the first bypass pipeline is communicated with an engine air inlet pipeline; the air system further comprises a controller which is respectively and electrically connected with the aerodynamic device and the first valve body and is used for controlling the first valve body to close the communication between the EGR cooler and the aerodynamic device under a first preset working condition, opening the communication between the aerodynamic device and the first bypass pipeline and controlling the aerodynamic device to work.
Optionally, the air system further comprises a second bypass pipeline, a second valve body and a third valve body, wherein the second bypass pipeline is communicated with the EGR pipeline between the aerodynamic device and the engine air inlet pipeline through the second valve body, the other end of the second bypass pipeline is communicated with the engine air inlet pipeline, the third valve body is arranged at the connection port of the first bypass pipeline and the engine air inlet pipeline, and the connection port of the first bypass pipeline and the engine air inlet pipeline is positioned before the connection port of the second bypass pipeline and the engine air inlet pipeline; the controller is also respectively connected with the second valve body and the third valve body, and is used for controlling the second valve body to close the communication between the aerodynamic device and the engine air inlet pipeline, opening the communication between the aerodynamic device and the second bypass pipeline, controlling the third valve body to open the connection between the first bypass pipeline and the engine air inlet pipeline, and closing the communication between the first bypass pipeline and the engine air inlet pipeline connecting port and the communication between the second bypass pipeline and the engine air inlet pipeline connecting port.
Optionally, the controller controls the first valve body to close the communication between the EGR cooler and the aerodynamic device and to open the communication between the aerodynamic device and the first bypass pipeline under a second preset working condition, controls the second valve body to close the communication between the aerodynamic device and the engine air inlet pipeline and to open the communication between the aerodynamic device and the second bypass pipeline and controls the third valve body to open the connection between the first bypass pipeline and the engine air inlet pipeline and to close the communication between the first bypass pipeline and the engine air inlet pipeline connection port and between the second bypass pipeline and the engine air inlet pipeline connection port.
Optionally, the air system further comprises an electricity storage device connected with the power device for supplying electricity to the aerodynamic device.
Optionally, the controller exits the power supply working mode under a third preset working condition and enters the energy recovery working mode.
Optionally, the power device includes: at least one of a pump, a blower and a fan.
According to another aspect, an embodiment of the present application provides an air system control method, which is applicable to a controller in any one of the foregoing air systems, and is characterized in that the control method includes: acquiring the working condition of an automobile; when the automobile working condition is in a first preset working condition, the first valve body is controlled to close the communication between the EGR cooler and the aerodynamic device, the aerodynamic device is opened to communicate with the first bypass pipeline, and the aerodynamic device is controlled to work.
Optionally, the method further comprises: when the automobile working condition is in a first preset working condition, the second valve body is controlled to be closed for communicating the aerodynamic device with the engine air inlet pipeline, the aerodynamic device is opened for communicating the second bypass pipeline, the third valve body is controlled to be opened for connecting the first bypass pipeline with the engine air inlet pipeline, and the first bypass pipeline is closed for communicating the first bypass pipeline with the engine air inlet pipeline connecting port and the second bypass pipeline with the engine air inlet pipeline connecting port.
Optionally, the method further comprises: when the automobile working condition is in a second preset working condition, the first valve body is controlled to open the communication between the EGR cooler and the aerodynamic device, the aerodynamic device is closed to be communicated with the first bypass pipeline, the second valve body is controlled to open the communication between the aerodynamic device and the engine air inlet pipeline, the aerodynamic device is closed to be communicated with the second bypass pipeline, the third valve body is controlled to be closed to be connected with the engine air inlet pipeline, and the first bypass pipeline is opened to be communicated with the engine air inlet pipeline connecting port and the engine air inlet pipeline connecting port.
Optionally, the method further comprises: and when the working condition of the automobile is in a third preset working condition, controlling the aerodynamic device to apply work to transmit electric energy to the electric storage device.
In this application, be provided with first bypass line and first valve between EGR pipeline and the admission line in vehicle air system, be provided with EGR cooler and aerodynamic device on the EGR pipeline in order, can realize the control of whole area EGR rate through aerodynamic device, optimize the turbo charger efficiency in the aerodynamic system simultaneously, realize high-efficient pressure boost, promote fuel economy. In addition, under the first preset working condition of the engine, the first bypass pipeline is connected with the air system in a bypass mode, so that series-connection type two-stage supercharging is realized, the air inlet pressure and flow of the engine are increased, and the dynamic property and economical efficiency of the engine are improved.
Further, a second bypass line, a second valve, and a third valve are also provided in the vehicle air system between the EGR line and the intake line. When the engine is in a first working condition, the EGR system is locked, the first bypass pipeline and the second bypass pipeline are connected with the air power system in a bypass mode, two-stage supercharging in series connection is achieved, the air inlet pressure and flow of the engine are increased, and the dynamic property and economical efficiency of the engine are improved.
Further, an energy storage device connected with the aerodynamic device is also arranged to provide power for the aerodynamic device, and when the engine is in a third working condition, the energy storage device is controlled to switch the working mode to recycle energy, so that energy consumption is reduced, and economical efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of an air system in one embodiment of the present application;
FIG. 2 is a schematic diagram of another air system in accordance with one embodiment of the present application;
FIG. 3 is a schematic diagram of another air system in accordance with one embodiment of the present application;
FIG. 4 is a schematic diagram of a hardware environment of an air system control method according to an embodiment of the present application;
FIG. 5 is a flow chart of a method of controlling an air system according to an embodiment of the present application;
fig. 6 is a block diagram of an alternative electronic device of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the prior art, in order to improve the transient response speed of an engine, work is generally applied to a turbocharger through an air compressor and a gas storage device in a vehicle braking system, so that the hysteresis of the turbocharger is improved, and the utilization rate of the air compressor and the gas storage device is also improved. However, when the vehicle engine is started in a cold or idle condition, the emission concentration of the nitrogen oxide is relatively low because the engine does not generate a higher temperature at the moment, and the EGR system does not participate in the engine operation at the moment in order to prevent the EGR from deteriorating the working efficiency of the engine; when the engine needs high power and high rotation speed, i.e. the engine is under a high-load and high-speed working condition, such as a climbing working condition, the EGR system can not participate in the working of the engine in order to ensure that the engine has good performance, acceleration and necessary purification effect. When the EGR system is not engaged in engine operation, the operating efficiency of the engine is reduced, while the EGR valve also has an effect on supercharger efficiency.
Based on this, the first aspect of the present application proposes an air system, which, referring to fig. 1, includes an EGR system 100, an engine intake pipe 200, and an engine outlet pipe 300, wherein the EGR system 100 includes an EGR pipe 101 communicating between the engine intake pipe 200 and the engine outlet pipe 300, and an EGR cooler 110 and a gas power device 120 are provided in order from the engine outlet pipe 300 to the engine intake pipe 200 on the EGR pipe 101; a first bypass line 400 (shown by a broken line in fig. 1) is connected to the EGR line 101 between the EGR cooler 110 and the gas power device 120 through a first valve body 130, and the other end of the first bypass line 400 is connected to the engine intake line 200; the air system further includes a controller 500 electrically connected to the aerodynamic device 120 and the first valve body 130, respectively, and taking an idle speed condition and a climbing condition of the vehicle engine as first preset conditions, wherein the controller controls the first valve body 130 to close the communication between the EGR cooler 110 and the aerodynamic device 120 and to open the communication between the aerodynamic device 120 and the first bypass pipe 400 under the first preset conditions, and simultaneously controls the aerodynamic device 120 to operate.
In the embodiment of the application, the air inlet pipeline is directly connected with the aerodynamic device through the first bypass pipeline, the aerodynamic device is controlled to be pressurized, the air inflow of the engine meets the current working condition, and the performance of the engine is improved. In order to more accurately control the air inflow of the engine, the starting power device is connected to the front of the turbocharger through a pipeline under a first preset working condition, and two-stage supercharging is achieved with the turbocharger, so that the dynamic performance of the engine is further improved.
As a more specific example, referring to fig. 2, the air system further includes a second bypass pipe 600 (as indicated by a dotted line in fig. 2), a second valve body 140, and a third valve body 150, wherein the second bypass pipe 600 is communicated with the EGR pipe 101 between the gas power plant 120 and the engine intake pipe 200 through the second valve body 140, the other end of the second bypass pipe 600 is communicated with the engine intake pipe 200, the third valve body 150 is disposed at a connection port of the first bypass pipe 400 and the engine intake pipe 200, and the connection port of the first bypass pipe 400 and the engine intake pipe 200 is before the connection port of the second bypass pipe 600 and the engine intake pipe 200; the controller 500 is further connected to the second valve body 140 and the third valve body 150, and under a first preset condition, the controller 500 controls the second valve body 140 to close the communication between the aerodynamic device 120 and the engine intake pipe 200 and open the communication between the aerodynamic device 120 and the second bypass pipe 600, and controls the third valve body 150 to open the connection between the first bypass pipe 400 and the engine intake pipe 200 and close the communication between the first bypass pipe 400 and the engine intake pipe 200 and between the second bypass pipe 600 and the engine intake pipe 200. The two-stage supercharging is formed between the gas power device and the turbocharger 800, and the engine power is further improved.
At medium engine load, the nitrogen oxide increases with increasing engine load, and at this time, EGR starts to participate in the engine operation, and the EGR rate increases with increasing engine load. In the embodiment of the application, when the EGR participates in the engine work, the closing of the bypass pipeline is controlled, so that the aerodynamic device is used as an EGR valve, and the EGR rate is actively controlled to meet the requirements of the EGR rate under different working conditions of the engine.
As an alternative embodiment, taking the condition of medium load of the engine as the second preset condition, the controller 500 controls the first valve body 130 to open the communication between the EGR cooler 110 and the aerodynamic device 120 and close the communication between the aerodynamic device 120 and the first bypass pipe 400, controls the second valve body 140 to open the communication between the aerodynamic device 120 and the engine intake pipe 200 and close the communication between the aerodynamic device 120 and the second bypass pipe 600, and controls the third valve body 150 to close the connection between the first bypass pipe 400 and the engine intake pipe 200 and open the communication between the first bypass pipe 400 and the engine intake pipe 200 and the connection between the second bypass pipe 600 and the engine intake pipe 200. At this point the bypass line is closed and the controller actively controls the EGR rate by controlling the aerodynamic device 120 so that it meets the current engine operating conditions.
As another alternative embodiment, the air system further includes an electric storage device 700, as shown in fig. 3, where the electric storage device 700 is connected to the aerodynamic device 120 to provide energy required for operation of the aerodynamic device 120, for example, to provide electric energy, and is connected to the controller 500, and the controller 500 sends a signal to the electric storage device 700 according to the energy required for the working condition of the engine to control the working state of the electric storage device 700 to meet the requirement of the aerodynamic device 120.
As a further embodiment, when the driving pressure difference between the air inlet pipe 200 and the air outlet pipe 300 of the engine is sufficient, the aerodynamic device 120 is not required to provide power, taking the high driving pressure difference as a third preset state as an example, the controller 500 can control the electric storage device 700 to exit the power supply working mode and enter the energy recovery working mode under the third preset working condition, at this time, the high driving pressure difference drives the aerodynamic device 120 to mechanically move, the electric storage device 700 receives a signal to stop supplying power to the aerodynamic device 120 to supply electric energy, and enters the energy recovery working mode to convert the mechanical energy of the mechanical movement into electric energy for storage, so as to reduce energy consumption.
As a more specific example, the aerodynamic device may be at least one of a pump, a blower, and a fan. Illustratively, taking a pump as an example, in a first predetermined operating mode, the controller 500 locks the EGR system into operation and boosts the charge through the pump to provide power to the engine; in a second preset operating mode, the pumping control EGR rate is used to optimize the turbocharger 800, reducing pumping losses; in a third predetermined operating mode, the pump stores electrical energy into the electrical storage device 700 by acting upon a sufficient pressure differential.
As an alternative embodiment, the air power device takes an electric pump as an embodiment, and the engine does not need the EGR system 100 to participate in working when the engine is in a low-speed working condition or a climbing working condition, and the bypass of the electric pump is realized through the first valve body 130, the second valve body 140 and the third valve body 150, so that a two-stage supercharging system in which the electric pump and the turbocharger 800 are connected in series is formed. The fresh air after the air filtration after the third valve body 150 is closed first passes through the first valve body 130 to reach the electric pump, at this time, the first valve body 130 ensures that the exhaust gas after the EGR cooler 110 is in a closed state and does not circulate, and the second valve body 140 closes the original connection with the air inlet pipeline 200, but the bypass pipeline enters the rear of the air filter 900. And then the electric pump is controlled to work according to the required rotating speed, air after being pressurized by the electric pump enters the turbine for pressurization, the air inlet pressure and flow of the engine are improved after two-stage pressurization, the torque output of a low-speed working condition or a climbing working condition is ensured, and meanwhile, the oil consumption can be greatly reduced. When the engine has EGR rate requirement, the three valve bodies are controlled to be closed, the system is restored to the original state, and the EGR rate is actively controlled through the electric pump.
The embodiment of the present application further provides an air system control method, which is applicable to the controller of the air system in the above embodiment, alternatively, in this embodiment, the air system control method may be applied to a hardware environment formed by the terminal 402 and the server 404 as shown in fig. 4. As shown in fig. 4, the server 404 is connected to the terminal 402 through a network, which may be used to provide services to the terminal or a client installed on the terminal, may set a database on the server or independent of the server, may be used to provide data storage services to the server 404, and may also be used to process cloud services, where the network includes, but is not limited to: the terminal 402 is not limited to a PC, a mobile phone, a tablet computer, a vehicle-mounted terminal, or the like. The shift strategy control method in the embodiment of the present application may be executed by the server 404, may be executed by the terminal 402, or may be executed by both the server 404 and the terminal 402. The terminal 402 may also execute the air system control method according to the embodiment of the present application by a client installed thereon. Taking the control method of performing full-time battery equalization in the present embodiment by the terminal 402 and/or the server 404 as an example, fig. 5 is a schematic flow chart of an air system control method according to an embodiment of the present application, and as shown in fig. 5, the flow chart of the method may include the following steps:
s51, acquiring the working condition of the automobile;
s52, when the automobile working condition is in a first preset working condition, controlling the first valve body to close the communication between the EGR cooler and the aerodynamic device, opening the communication between the aerodynamic device and the first bypass pipeline, and controlling the aerodynamic device to work.
Through the technical scheme in the step S51, the current automobile state is timely and accurately determined, the accurate timely response speed of the engine is ensured, and the air system improves the overall performance of the engine.
Through the technical scheme in the step S52, when the automobile is in the idle working condition and the climbing working condition as the first preset working condition, namely the heavy load working condition, the high-speed working condition and the cold idle working condition, and the EGR system does not participate in the engine, the gas device is directly pressurized through the first bypass pipeline so as to improve the overall performance of the engine.
As a more specific embodiment, to improve the power performance of the engine, the method further includes: when the automobile working condition is in a first preset working condition, the second valve body is controlled to be closed for communicating the aerodynamic device with the engine air inlet pipeline, the aerodynamic device is opened for communicating the second bypass pipeline, the third valve body is controlled to be opened for connecting the first bypass pipeline with the engine air inlet pipeline, and the first bypass pipeline is closed for communicating the first bypass pipeline with the engine air inlet pipeline connecting port and the second bypass pipeline with the engine air inlet pipeline connecting port. The gas device and the turbocharger are connected in series in a bypass mode, so that the air system is supercharged in two stages, and the dynamic property of the engine is further improved.
Under the medium-load working condition of the engine, the EGR system participates in the operation of the engine, and the gas power device is not needed to boost to provide power for the engine, the application controls the EGR rate through the gas power device to optimize the efficiency of the turbocharger, and the method further comprises the following steps of: when the automobile working condition is in a second preset working condition, the first valve body is controlled to open the communication between the EGR cooler and the aerodynamic device, the aerodynamic device is closed to be communicated with the first bypass pipeline, the second valve body is controlled to open the communication between the aerodynamic device and the engine air inlet pipeline, the aerodynamic device is closed to be communicated with the second bypass pipeline, the third valve body is controlled to be closed to be connected with the engine air inlet pipeline, and the first bypass pipeline is opened to be communicated with the engine air inlet pipeline connecting port and the engine air inlet pipeline connecting port. Controlling the opening of the aerodynamic device to adapt to the current EGR rate according to the current working condition of the engine; or when the working condition of the engine changes, the EGR rate can not meet the working condition after the engine changes, for example, a driver jerks the accelerator, the engine speed is increased at the moment, the EGR rate is lower than the working condition after the engine speed is increased, the gas power device is controlled to increase the working mode, and the EGR rate is increased to meet the working condition after the change.
As an alternative embodiment, the electric energy can be recovered when the driving pressure difference of the engine is large enough, so as to reduce energy consumption, and the driving pressure difference of the engine is taken as a third preset working condition, and the method further comprises the following steps: when the automobile working condition is in a third preset working condition, the electricity storage device is controlled to exit the power supply working mode and enter the energy recovery working mode.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM (Read-Only Memory)/RAM (Random Access Memory ), magnetic disk, optical disc), including instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.
According to still another aspect of the embodiments of the present application, there is also provided an electronic device for implementing the above air system control method, where the electronic device may be a server, a terminal, or a combination thereof.
Fig. 6 is a block diagram of an alternative electronic device, according to an embodiment of the present application, including a processor 602, a communication interface 604, a memory 606, and a communication bus 608, as shown in fig. 6, wherein the processor 602, the communication interface 604, and the memory 606 communicate with each other via the communication bus 608, wherein,
a memory 606 for storing a computer program;
the processor 602, when executing the computer program stored on the memory 606, performs the following steps:
acquiring the working condition of an automobile;
when the automobile working condition is in a first preset working condition, the first valve body is controlled to close the communication between the EGR cooler and the aerodynamic device, the aerodynamic device is opened to communicate with the first bypass pipeline, and the aerodynamic device is controlled to work.
Alternatively, in the present embodiment, the above-described communication bus may be a PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus, or an EISA (Extended Industry Standard Architecture ) bus, or the like. The communication bus may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, only one thick line is shown in fig. 6, but not only one bus or one type of bus.
The communication interface is used for communication between the electronic device and other devices.
The memory may include RAM or may include non-volatile memory (non-volatile memory), such as at least one disk memory. Optionally, the memory may also be at least one memory device located remotely from the aforementioned processor.
The processor may be a general purpose processor and may include, but is not limited to: CPU (Central Processing Unit ), NP (Network Processor, network processor), etc.; but also DSP (Digital Signal Processing, digital signal processor), ASIC (Application Specific Integrated Circuit ), FPGA (Field-Programmable Gate Array, field programmable gate array) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments, and this embodiment is not described herein.
It will be appreciated by those skilled in the art that the configuration shown in fig. 6 is merely illustrative, and the device implementing the air system control method may be a terminal device, and the terminal device may be a smart phone (such as an Android mobile phone, an iOS mobile phone, etc.), a tablet computer, a palmtop computer, a mobile internet device (Mobile Internet Devices, MID), a PAD, etc. Fig. 6 is not limited to the structure of the electronic device. For example, the terminal device may also include more or fewer components (e.g., network interfaces, display devices, etc.) than shown in fig. 6, or have a different configuration than shown in fig. 6.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program for instructing a terminal device to execute in association with hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: flash disk, ROM, RAM, magnetic or optical disk, etc.
According to yet another aspect of embodiments of the present application, there is also provided a storage medium. Alternatively, in the present embodiment, the above-described storage medium may be used for executing the program code of the air system control method.
Alternatively, in this embodiment, the storage medium may be located on at least one network device of the plurality of network devices in the network shown in the above embodiment.
Alternatively, in the present embodiment, the storage medium is configured to store program code for performing the steps of:
acquiring the working condition of an automobile;
when the automobile working condition is in a first preset working condition, the first valve body is controlled to close the communication between the EGR cooler and the aerodynamic device, the aerodynamic device is opened to communicate with the first bypass pipeline, and the aerodynamic device is controlled to work.
Alternatively, specific examples in the present embodiment may refer to examples described in the above embodiments, which are not described in detail in the present embodiment.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a U disk, ROM, RAM, a mobile hard disk, a magnetic disk or an optical disk.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
The integrated units in the above embodiments may be stored in the above-described computer-readable storage medium if implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause one or more computer devices (which may be personal computers, servers or network devices, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In several embodiments provided in the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the division of the units, is merely a logical function division, and may be implemented in another manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in the present embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.

Claims (8)

1. An air system, characterized in that the air system comprises an EGR system, an engine air inlet pipeline and an engine air outlet pipeline, wherein the EGR system comprises an EGR pipeline communicated between the engine air inlet pipeline and the engine air outlet pipeline, and an EGR cooler and a gas power device are sequentially arranged on the EGR pipeline from the engine air outlet pipeline to the engine air inlet pipeline;
a first bypass pipeline is communicated with an EGR pipeline between the EGR cooler and the aerodynamic device through a first valve body, and the other end of the first bypass pipeline is communicated with an engine air inlet pipeline;
the air system further comprises a controller which is respectively and electrically connected with the aerodynamic device and the first valve body and is used for controlling the first valve body to close the communication between the EGR cooler and the aerodynamic device and to open the communication between the aerodynamic device and the first bypass pipeline and to control the aerodynamic device to work under a first preset working condition;
the air system further comprises a second bypass pipeline, a second valve body and a third valve body, wherein the second bypass pipeline is communicated with an EGR pipeline between the aerodynamic device and the engine air inlet pipeline through the second valve body, the other end of the second bypass pipeline is communicated with the engine air inlet pipeline, the third valve body is arranged at the connecting port of the first bypass pipeline and the engine air inlet pipeline, and the connecting port of the first bypass pipeline and the engine air inlet pipeline is arranged in front of the connecting port of the second bypass pipeline and the engine air inlet pipeline;
the controller is further connected with the second valve body and the third valve body respectively, and is used for controlling the second valve body to be closed under a first preset working condition, communicating the aerodynamic device with the engine air inlet pipeline, opening the aerodynamic device to be communicated with the second bypass pipeline, controlling the third valve body to be opened, connecting the first bypass pipeline with the engine air inlet pipeline, and closing the first bypass pipeline to be communicated with the engine air inlet pipeline connecting port and communicating the second bypass pipeline with the engine air inlet pipeline connecting port.
2. The air system of claim 1, wherein the controller controls the first valve body to open communication between the EGR cooler and the aerodynamic device and to close communication between the aerodynamic device and the first bypass line, controls the second valve body to open communication between the aerodynamic device and the engine intake line and to close communication between the aerodynamic device and the second bypass line, and controls the third valve body to close connection between the first bypass line and the engine intake line and to open communication between the first bypass line and the engine intake line connection port and the second bypass line and the engine intake line connection port under a second preset operating condition.
3. The air system of claim 1, further comprising an electrical storage device coupled to the aerodynamic device for supplying power to the aerodynamic device.
4. An air system according to claim 3 wherein the controller controls the power storage device to exit the power mode of operation and enter the energy recovery mode of operation under a third predetermined condition.
5. The air system of claim 1, wherein the aerodynamic device comprises: at least one of a pump, a blower and a fan.
6. An air system control method, which is applied to the controller in the air system according to any one of claims 1 to 5, characterized in that the control method comprises:
acquiring the working condition of an automobile;
when the automobile working condition is in a first preset working condition, the first valve body is controlled to be closed for communication between the EGR cooler and the aerodynamic device, the aerodynamic device is opened for communication with the first bypass pipeline, the second valve body is controlled to be closed for communication between the aerodynamic device and the engine air inlet pipeline, the aerodynamic device is opened for communication with the second bypass pipeline, the third valve body is controlled to be opened for connection between the first bypass pipeline and the engine air inlet pipeline, the first bypass pipeline is closed for communication between the first bypass pipeline and the engine air inlet pipeline, the second bypass pipeline is closed for communication between the second bypass pipeline and the engine air inlet pipeline, and the aerodynamic device is controlled to work.
7. The air system control method of claim 6, further comprising:
when the automobile working condition is in a second preset working condition, the first valve body is controlled to open the communication between the EGR cooler and the aerodynamic device, the aerodynamic device is closed to be communicated with the first bypass pipeline, the second valve body is controlled to open the communication between the aerodynamic device and the engine air inlet pipeline, the aerodynamic device is closed to be communicated with the second bypass pipeline, the third valve body is controlled to be closed to be connected with the engine air inlet pipeline, and the first bypass pipeline is opened to be communicated with the engine air inlet pipeline connecting port and the engine air inlet pipeline connecting port.
8. The air system control method of claim 6, further comprising:
when the automobile working condition is in a third preset working condition, the electricity storage device is controlled to exit the power supply working mode and enter the energy recovery working mode.
CN202210393066.6A 2022-04-15 2022-04-15 Air system and air system control method Active CN114704409B (en)

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JP2007127070A (en) * 2005-11-04 2007-05-24 Hino Motors Ltd Internal combustion engine with supercharger
JP2012197716A (en) * 2011-03-22 2012-10-18 Hino Motors Ltd Exhaust loss recovery device
CN104847537B (en) * 2015-04-10 2017-07-04 中国第一汽车股份有限公司无锡油泵油嘴研究所 A kind of engine breathing control system and control method
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