CN115898723A - Air intake system, control method and control device of engine - Google Patents

Abstract

The embodiment of the disclosure provides an air intake system, a control method, a control device, a storage medium and electronic equipment of an engine, wherein the air intake system comprises a main air intake pipeline and a control unit, the main air intake pipeline is connected with a plurality of parallel air intake branches, each air intake branch is connected with at least one cylinder in the engine, an air intake intercooler is arranged on each air intake branch, a communication pipeline is arranged between the two air intake branches, a valve for controlling the on-off of the communication pipeline is arranged on the communication pipeline, and the valve is connected with the control unit. The embodiment of the disclosure can selectively connect or separate the air inlet branch circuits corresponding to the cylinders on two sides when the engine operates under different working conditions, and can solve the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders on two sides of the engine caused by arranging the intercooling devices on different air inlet branch circuits.

Description

Air intake system, control method and control device of engine

Technical Field

The disclosure relates to the technical field of air intake systems of engines, in particular to an air intake system, a control method and a control device of an engine.

Background

At present, two sets of intercooling devices are generally arranged in an air inlet system of a supercharged V-type gasoline engine and are used for cooling gas supercharged in pipelines of the air inlet systems on two sides respectively. However, under specific engine operating conditions, the arrangement of two sets of intercooling devices and two air inlet pipelines can cause the problem that the difference between the air inlet flow rates or the air inlet conditions of the cylinders on two sides of the engine is overlarge.

Therefore, the invention provides an air inlet pipeline and a control method for two sides of a V-shaped gasoline engine, which can selectively communicate or separate the air inlet pipelines of the cylinders at two sides of the gasoline engine under different working conditions of the engine, and solves the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders at two sides of the engine caused by two sets of intercooling devices and two air inlet pipelines. Due to the advantages of compact space, stable operation and the like, the configuration of the V-shaped engine is widely applied to the field of design and manufacture of large-displacement engines. However, under specific engine operating conditions, the arrangement of two sets of intercooling devices and two air inlet pipelines can cause the problem that the difference between the air inlet flow rates or the air inlet conditions of the cylinders on two sides of the engine is overlarge.

Disclosure of Invention

An object of the embodiments of the present disclosure is to provide an intake system, a control method, a control device, a storage medium, and an electronic device of an engine, so as to solve a problem in the prior art that a difference between intake air flow rates or intake conditions of cylinders on two sides of the engine is too large.

In order to solve the technical problem, the embodiment of the present disclosure adopts the following technical solutions:

the embodiment of the disclosure provides an air intake system of an engine, which comprises a main air intake pipeline and a control unit, wherein the main air intake pipeline is connected with a plurality of parallel air intake branches, each air intake branch is connected with at least one cylinder in the engine, an air intake intercooler is arranged on each air intake branch, a communication pipeline is arranged between the two air intake branches, a valve for controlling the on-off of the communication pipeline is arranged on each communication pipeline, and the valve is connected with the control unit.

In some embodiments, an air flow meter, a throttle valve and a supercharger are arranged on the main air inlet pipeline in sequence, the air flow meter, the throttle valve and the supercharger are all connected with the control unit, and an air filter is arranged on the upstream of the air flow meter.

In some embodiments, an intake air state sensor is provided upstream of the throttle valve and on the intake branch, respectively.

An embodiment of the present disclosure further provides a control method of an intake system, where the intake system is the intake system according to any one of the above technical solutions, and the control method includes: acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and a valve switching state; comparing the real-time working condition information with a preset threshold value to obtain a comparison result; and adjusting the working state of the valve based on whether the running working condition of the engine is in a communication target working condition or not and the comparison result.

In some embodiments, after said obtaining the real-time operating condition information of the engine, the method further comprises: judging whether the real-time working condition information is effective or not; and when the real-time working condition information is invalid information, regulating the valve to be in a closed state.

In some embodiments, the comparing the real-time operating condition information with preset information to obtain a comparison result includes: determining a state of the engine based on the engine speed value; when the engine is in a running state, sequentially comparing first difference values of air inlet pressure values of different air inlet branches and second difference values of air inlet temperature values of different air inlet branches with a preset threshold value to obtain a comparison result; the valve is adjusted to be in a closed state when the engine is in a non-operating state.

In some embodiments, said adjusting the operating state of the valve based on whether the operating condition of the engine is within the communicated target condition region and the comparison result comprises: when the operating condition of the engine is in the communication target working condition area, adjusting the valve to be in an open state; and under the condition that the operation working condition of the engine is not in the communication target working condition area, adjusting the working state of the valve based on the comparison result.

An embodiment of the present disclosure further provides a control device of an intake system, where the intake system is the intake system according to any one of the above technical solutions, and the control device includes: the acquisition module is used for acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and the opening and closing state of the valve; the comparison module is used for comparing the real-time working condition information with a preset threshold value to obtain a comparison result; and the adjusting module is used for adjusting the working state of the valve based on whether the running working condition of the engine is in a communication target working condition or not and the comparison result.

The embodiment of the present disclosure further provides a storage medium storing a computer program, where the computer program is executed by a processor to implement the steps of any one of the methods described above.

An embodiment of the present disclosure further provides an electronic device, which at least includes a memory and a processor, where the memory stores a computer program thereon, and the processor implements the steps of any one of the above methods when executing the computer program on the memory.

The embodiment of the disclosure can selectively connect or separate the air inlet branch circuits corresponding to the cylinders on two sides when the engine operates under different working conditions, and can solve the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders on two sides of the engine caused by arranging the intercooling devices on different air inlet branch circuits.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and for those skilled in the art, other drawings may be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic illustration of an air induction system of an engine according to an embodiment of the present disclosure;

FIG. 2 is a schematic step diagram of a method of controlling an air induction system according to an embodiment of the disclosure;

FIG. 3 is a flowchart illustrating an exemplary method of controlling an air induction system according to an embodiment of the present disclosure;

FIG. 4 is a schematic step diagram illustrating a method of controlling an air induction system according to an embodiment of the present disclosure;

FIG. 5 is a schematic step diagram illustrating a method of controlling an air induction system according to an embodiment of the present disclosure;

FIG. 6 is a detailed flowchart of a method of controlling an air induction system according to an embodiment of the present disclosure;

FIG. 7 is a flowchart illustrating a method for controlling an intake system according to an embodiment of the present disclosure.

Detailed Description

Various aspects and features of the disclosure are described herein with reference to the drawings.

It should be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be considered as limiting, but merely as exemplifications of embodiments. Other modifications will occur to those skilled in the art within the scope and spirit of the disclosure.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

These and other characteristics of the present disclosure will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.

It should also be understood that, although the present disclosure has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of the disclosure, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various forms. Well-known and/or repeated functions and structures have not been described in detail so as not to obscure the present disclosure with unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.

The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the disclosure.

A first embodiment of the present disclosure provides an air intake system for an engine, which may be, in particular, a V-type gasoline engine having two rows of cylinders arranged in a V-shape, which is given by way of example only, and which may also be used, for example, for a W-type gasoline engine, with different types of engines having different configurations of air intake systems.

As shown in fig. 1, fig. 1 shows a schematic structural diagram of an air intake system provided by the embodiment of the present disclosure, the air intake system includes a primary air intake pipeline 100 and a control unit 1, where the control unit 1 may be an engine electronic control unit, for example; the primary air intake circuit 100 is connected to a plurality of parallel air intake branches 101, where the number of air intake branches 101 depends on the type of engine. In the intake system of the V-type gasoline engine according to the present embodiment, for example, two intake branches 101, a first intake branch 101a and a second intake branch 101b, which are arranged in parallel, may be adopted, and each intake branch 101 is connected to at least one cylinder 12 in the engine, and in particular, in the V-type gasoline engine, each intake branch 101 corresponds to at least one cylinder 12 on one side of the V-shape. The cylinder 12 is used for providing a space for compression, combustion and expansion for a working medium (a mixture of fuel and air) entering the combustion chamber, so that the working medium is converted into heat energy from chemical energy and further converted into mechanical energy.

Further, an air flow meter 3, a throttle valve 5, and a supercharger 6 are provided in this order in the primary intake pipe 100, and the air flow meter 3, the throttle valve 5, and the supercharger 6 are all connected to the control unit 1.

Further, an air cleaner 2 is arranged upstream of the air flow meter 3, the air cleaner 2 is connected with the throttle valve 5 through a gas pipeline, and the air cleaner 2 is used for filtering air entering an air inlet system of the engine and preventing dust or impurities in the air from entering the air inlet system of the engine to cause damage to related components.

Further, the air flow meter 3 is installed on a gas pipeline connecting the air cleaner 2 and the throttle valve 5, the air flow meter 3 is connected with the control unit 1 through a control signal line, and the air flow meter 3 is used for measuring and collecting the current intake air flow of the air intake system of the engine as a basis for the control unit 1 to calculate the current engine intake air flow, the work load and other data.

Further, the throttle valve 5 is connected with the air cleaner 2 and the supercharger 6 through gas pipelines, the throttle valve 5 is connected with the control unit 1 through a control signal line, and the throttle valve 5 is used for receiving a control signal from the control unit 1 and executing and maintaining corresponding opening degree so as to adjust the air intake quantity, the working load and the like of an air intake system of the engine.

The supercharger 6 is connected with the first intake intercooler 7 and the second intake intercooler 9 through gas pipelines, the supercharger 6 is connected with the control unit 1 through control signal lines, and the supercharger 6 is used for receiving control signals from the control unit 1 and executing and maintaining corresponding supercharging capacity so as to adjust the air intake amount, the working load and the like of an air intake system of the engine.

A first air intake state sensor 4 is arranged upstream of the throttle valve 5, wherein the first air intake state sensor 4 can be a pre-throttle air intake state sensor, for example, the first air intake state sensor 4 is arranged on an air pipeline connecting the air cleaner 2 and the throttle valve 5, the first air intake state sensor 4 is connected with the control unit 1 through a control signal line, and the first air intake state sensor 4 is used for measuring and collecting the air intake state upstream of the throttle valve 5 to be used as a data basis for the control unit 1 to calculate the current engine air intake amount and the working load.

Further, an intake intercooler is respectively arranged on each intake branch 101, wherein the intake intercooler is used for cooling intake air in the intake branch 101, a first intake intercooler 7 and a second intake intercooler 9 are respectively arranged on the first intake branch 101a and the second intake branch 101b, the first intake intercooler 7 and the second intake intercooler 9 are connected with the supercharger 6 and the cylinder 12 through gas pipelines,

in this way the cylinder 12 is connected via a gas line to either a first charge air intercooler 7 (for the cylinder 12 on the first side of the engine) or a second charge air intercooler 9 (for the cylinder 12 on the second side of the engine).

The first charge air intercooler 7 here has the function of providing a cooling effect for the engine intake air flow from the supercharger 6 to the cylinders 12 on the first side of the engine, and the second charge air intercooler 9 here has the function of providing a cooling effect for the engine intake air flow from the supercharger 6 to the cylinders 12 on the second side of the engine, so as to lower the intake air temperature of the intake system of the engine, raise the intake air quantity of the intake system of the engine and reduce the tendency of knocking combustion in the cylinders 12 during combustion.

Further, a second intake air state sensor 8 and a third intake air state sensor 10 are provided in the first intake branch passage 101a and the second intake branch passage 101b, respectively. Specifically, on the first air intake branch 101a, the second air intake state sensor 8 is installed on a gas pipeline connecting the first air intake intercooler 7 and the cylinder 12, the second air intake state sensor 8 is connected with the control unit 1 through a control signal line, and the second air intake state sensor 8 is used for measuring and collecting an air intake state at the downstream of the first air intake intercooler 7, so as to be used as a data basis for the control unit 1 to calculate the current engine air intake amount, the work load, and judge the numerical values of control parameters such as the correction of the advance angle of ignition; on the second air intake branch 101b, a third air intake state sensor 10 is installed on a gas pipeline connecting the second air intake intercooler 9 and the cylinder 12, the third air intake state sensor 10 is connected with the control unit 1 through a control signal line, and the third air intake state sensor 10 is used for measuring and collecting an air intake state at the downstream of the second air intake intercooler 9 to be used as a data basis for the control unit 1 to calculate the current engine air intake amount, the work load, and judge the numerical values of control parameters such as the correction of the ignition advance angle.

The installation position of the second intake state sensor 8 for measuring and acquiring the intake state downstream of the first intake intercooler 7 can be adjusted according to actual needs, but the technical purpose of measuring the intake state of the cylinder 12 on the first side of the engine can be met; similarly, the mounting position of the third intake state sensor 10 for measuring and acquiring the intake state downstream of the second intake intercooler 9 may be adjusted according to actual needs, but it is necessary to meet the technical purpose of measuring the intake state of the cylinder 12 that can represent the second side of the engine.

It will be appreciated by those skilled in the art that the relative positions of the air cleaner 2, the air flow meter 3, the first intake air state sensor 4, the throttle valve 5, the supercharger 6, the first intake charge air cooler 7 and the second intake charge air cooler 9 in the gas line of the intake system of the engine can be adjusted according to actual requirements.

Furthermore, a communication pipeline 102 is arranged between any two of the air inlet branches 101, a valve 11 is arranged on the communication pipeline 102, the valve 11 is connected with the control unit 1, and the valve 11 is used for controlling the on-off of the communication pipeline 102, particularly selectively communicating or isolating the air inlet branches corresponding to the cylinders on two sides under different working conditions when the engine operates.

Specifically, in the embodiment of the present disclosure, the valve 11 is installed on the first intake branch 101a and the second intake branch 101b, the valve 11 is connected to the control unit 1 through a control signal line, and the valve 11 is configured to receive a control signal from the control unit 1, and perform and maintain a switching action to complete a connection or disconnection function of the communication pipeline 102 between the first intake branch 101a and the first intake branch 101 b.

The control unit 1 is connected to the air flow meter 3, the first intake air state sensor 4, the throttle valve 5, the supercharger 6, the second intake air state sensor 8, the third intake air state sensor 10, and the valve 11 via control signal lines. In addition, the control unit 1 is connected with other sensors and actuators needed for maintaining the normal operation of the engine through control signal lines. The control unit 1 is used for receiving, processing and analyzing the measurement signals from the sensors during the working operation of the engine, and calculating and sending corresponding control signals to the actuators according to control software and electric control parameter data preset in the control unit 1 based on the measurement signals so as to maintain the normal working operation of the engine.

The embodiment of the disclosure can selectively connect or separate the air inlet branch circuits corresponding to the cylinders on two sides when the engine operates under different working conditions, and can solve the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders on two sides of the engine caused by arranging the intercooling devices on different air inlet branch circuits.

A second embodiment of the present disclosure provides a control method of an intake system based on the intake system of the above-described embodiment, as shown in fig. 2, the control method including:

s101, acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and an opening and closing state of a valve.

In this step, real-time working condition information of the engine is obtained, where the real-time working condition information at least includes an engine speed value, an intake pressure value of each intake branch, an intake temperature value of each intake branch, and a valve on-off state. Specifically, real-time working condition information of the engine and an intake system thereof in a working operation process is firstly acquired, wherein the real-time working condition information at least comprises a rotating speed value of the engine, for example, intake pressure values in the first intake branch 101a and the second intake branch 101b on two sides of the V-type engine, intake temperatures in the first intake branch 101a and the second intake branch 101b, and an opening and closing state of the valve 11, wherein the valve 11 is located on the communication pipeline 102 between the first intake branch 101a and the second intake branch 101 b.

In the process of performing the step, it may also be obtained in advance whether the control unit 1 of the engine has completed power-on in obtaining the real-time working condition information of the engine.

In a specific judgment flow, as shown in fig. 3, after the start of this step, a judgment step is performed to judge whether the control unit 1 is in a "power on" state, and if the judgment result is "no", the step S0103 is performed: resetting all control variable values; the flow ends in step S01.

In another embodiment, after the obtaining of the real-time operating condition information of the engine, it is further required to further determine validity of the collected real-time operating condition information, as shown in fig. 4, further including:

s201, judging whether the real-time working condition information is effective or not.

S202, when the real-time working condition information is invalid, adjusting the valve to be in a closed state.

The judgment of the effectiveness of the real-time working condition information can be realized by any existing mode.

In a specific flow, as shown in fig. 3, on one hand, a determination step is performed, that is, whether the control unit 1 is in a "power on" state is determined, and if the determination result is "yes", a step S0101 is performed: collecting intake pressure values in intake ducts on two sides of an engine, intake temperatures in the intake ducts on two sides of the engine, engine speed signals and the like, namely, intake pressure values in the first intake branch 101a and the second intake branch 101b on two sides of the engine, intake temperature values in the first intake branch 101a and the second intake branch 101b, and signals of the engine speed value, and certainly, the signals may also include a switching state signal value of the valve 11; executing a judging step, namely judging whether the acquired signal is effective, if the judgment result is 'no', executing a step S0102: setting the value of the switch function enabling flag of the valve 11 to 0 and ending the process of step S01, wherein when the value of the switch function enabling flag of the valve 11 between the first air intake branch 101a and the second air intake branch 101b on both sides of the engine is set to 0, the control unit 1 controls the valve 11 to perform the adjustment to the closed state.

In a specific flow, on the other hand, a determination step is performed, that is, whether the control unit 1 is in the "power on" state is determined, and if the determination result is "yes", the step S0101 is performed: collecting intake pressure values in intake ducts on two sides of an engine, intake temperatures in the intake ducts on two sides of the engine, engine speed signals and the like, namely, intake pressure values in the first intake branch 101a and the second intake branch 101b on two sides of the engine, intake temperature values in the first intake branch 101a and the second intake branch 101b, and signals of the engine speed value, and certainly, the signals may also include a switching state signal value of the valve 11; and executing a judging step of judging whether the acquired signal is valid, and if the judgment result is yes, setting the value of the switching function enabling flag bit of the valve 11 to be 1 and ending the process step S01, where when the value of the switching function enabling flag bit of the valve 11 between the first air intake branch 101a and the second air intake branch 101b on both sides of the engine is set to be 1, the control unit 1 needs to adjust the working state of the valve 11 based on the judgment or comparison result in the subsequent process.

And S102, comparing the real-time working condition information with a preset threshold value to obtain a comparison result.

After the real-time operating condition information of the engine is obtained in step S101, in this step, the real-time operating condition information is compared with a preset threshold value to obtain a comparison result. In particular, the real-time operating condition information acquired during the working operation of the engine is compared with a preset threshold value, for example in the control unit 1.

Further, as shown in fig. 5, the comparing the real-time operating condition information with a preset threshold to obtain a comparison result includes:

and S301, judging the state of the engine based on the engine rotating speed value.

S302, when the engine is in a running state, sequentially comparing first difference values of the air inlet pressure values of different air inlet branches and second difference values of the air inlet temperature values of different air inlet branches with a preset threshold value to obtain a comparison result.

And S303, under the condition that the engine is in a non-operation state, regulating the valve to be in a closed state.

In this step, when it is determined that the engine is not in operation based on the engine speed value, the valve 11 needs to be adjusted to be in a closed state, and when it is determined that the engine is in operation based on the engine speed value, the operating state of the valve 11 continues to be controlled based on other parameters.

In a specific process, a control method for determining whether the engine is in an operating state is provided, and specifically, a control parameter (here, the control parameter may be named, for example, enaEngSpeed _ V _ L to indicate that the engine is in a valid operating state lower limit threshold) may be set in software and electronic control data preset in the control unit 1 as a numerical basis for determining whether the engine is in an operating state, when a value of an engine real-time speed (may be named, engSpeed _ a) expressed by an engine speed value (which may be described, for example, by an engine crankshaft phase signal) received by the control unit 1 from a sensor satisfies a condition, that is, engSpeed _ a > enangspeed _ V _ L, the engine is considered to be in an operating state, and a numerical value of the lower limit threshold indicating that the engine is in a valid operating state may be preset by a calibration engineer during development of the engine and calibration development of the electronic control data in the control unit 1 according to a calibration result.

In a specific judgment flow, on one hand, as shown in fig. 6, after the start of this step, step S0201 is executed, i.e., the engine speed value is compared with the information preset in the control unit 1; step S0202 is executed, and the comparison result of the engine rotating speed value is obtained; executing a judging step: that is, whether the engine is in an operating state is judged, and if the judgment result is "no", step S0207 is executed, and the value of the switch function enabling flag bit of the valve 11 is set to 0; the flow ends in step S02.

In a specific judgment flow, on the other hand, after the start of this step, step S0201 is executed, for example, by comparing the engine speed value with information preset in the control unit 1; step S0202 is executed, and the comparison result of the engine rotating speed value is obtained; executing a judging step, namely judging whether the engine is in a running state, if so, executing a step S0203, namely calculating air inlet pressure signals in air inlet pipelines at two sides of the engine and comparing the calculation result with information preset in the control unit 1, namely comparing air inlet pressure values collected in the first air inlet branch 101a and the second air inlet branch 101b at two sides of the engine with information preset in the control unit 1, and taking the air inlet pressure values as a basis for judging whether the running working condition of the engine enters a target working condition communication area of the air inlet pipelines at two sides of the engine and whether the valve 11 is opened in a subsequent control flow step; step S0204 is executed, that is, a calculation and comparison result of the obtained intake pressure signal, that is, a calculation and comparison result of the intake pressure values collected in the first intake branch 101a and the second intake branch 101b is obtained; step S0205 is executed, namely, the air inlet temperature signals in the air inlet pipelines on the two sides of the engine are calculated, and the calculation result is compared with the information preset in the control unit 1, so as to be used as a basis for judging whether the running working condition of the engine enters a target working condition area communicated with the air inlet pipelines on the two sides of the engine and whether the valve 11 is opened in the subsequent control process step; step S0206 is executed, that is, the obtained intake air temperature signal is calculated and compared, that is, the intake air temperature values in the first intake branch 101a and the second intake branch 101b are calculated and compared; the flow ends step S02.

The comparison result can be used as a control parameter for the subsequent adjustment of the valve 11, and can be, for example, a control parameter PIntkDiff _ abs _ a and a control parameter PIntkDiff _ V _ H. Specifically, a control parameter PIntkDiff _ abs _ a representing an absolute value of a real-time difference in the intake pressure values of the first intake branch 101a and the second intake branch 101b of the engine is calculated by:

PIntkDiff_abs_a＝|PIntk1_a-PIntk2_a|

wherein PIntk1_ a represents an intake pressure value of the first intake branch passage 101a measured and collected based on the second intake state sensor 8; PIntk2_ a represents the intake pressure value of the second intake branch 101b measured and collected in real time based on the third intake state sensor 10.

The control parameter PIntkDiff _ V _ H represents an upper limit threshold value of the real-time difference value of the intake air pressures of the first intake branch passage 101a and the second intake branch passage 101b for maintaining the valve 11 in the closed state (the value of the switch function enabling flag is set to 0).

Specifically, when PIntkDiff _ abs _ a > PIntkDiff _ V _ H, the valve 11 is preferably adjusted to be actuated and maintained in an open state to maintain communication between the first intake branch 101a and the second intake branch 101b on both sides of the engine. The values of the control parameters PIntkDiff _ V _ H are preset by a calibration engineer during the engine product development and calibration development of the electronic control data in the control unit 1 according to the calibration results.

It may also be a control parameter TIntkDiff _ abs _ a and TIntkDiff _ V _ H, where the control parameter TIntkDiff _ abs _ a represents a real-time difference in intake air temperature of the first intake branch 101a and the second intake branch 101b of the engine, and the value of the control parameter is calculated by:

TIntkDiff_abs_a＝|TIntk1_a-TIntk2_a|

wherein TIntk1_ a represents a real-time value of the intake air temperature of the first intake branch passage 101a of the engine measured and collected based on the second intake air state sensor 8; TIntk2_ a represents a real-time value of the intake air temperature of the second intake branch passage 101b measured and collected in real time based on the third intake state sensor 10. The control parameter TIntkDiff _ V _ H indicates an upper limit threshold of the real-time difference in the intake air temperature between the first intake branch passage 101a and the second intake branch passage 101b for maintaining the valve 11 in the closed state (the value of the switch function enabling flag is set to 0).

When TIntkDiff _ abs _ a > TIntkDiff _ V _ H, the valve 11 is preferably adjusted to be actuated and maintained in an open state to maintain communication between the first intake branch 101a and the second intake branch 101b on both sides of the engine. The values of the control parameters TIntkDiff _ V _ H here need to be preset by a calibration engineer during the engine production development and calibration development of the electronic control data in the control unit 1, based on the calibration results.

Before this step, it is also possible to determine the state of the valve 11 in advance, that is, whether the switch function enable flag of the valve 11 is 1.

S103, adjusting the working state of the valve based on whether the running working condition of the engine is in the communication target working condition or not and the comparison result.

After the real-time operating condition information is compared with the preset threshold value to obtain the comparison result through the above step S102, in this step, the operating state of the valve is adjusted based on whether the engine is in the communication target operating condition and the comparison result. Specifically, the operating state of the valve is adjusted based on whether the engine is in the communication target operating condition and the comparison result, and specifically a control instruction set is generated, which is used for calculating and generating an on-off adjustment instruction of the valve 11. Specifically, the method comprises the following steps:

s401, when the operation working condition of the engine is in the communication target working condition area, the valve is adjusted to be in an opening state.

Further, the method can also comprise the following steps:

the valve is adjusted to be in an open state for a first predetermined time.

S402, when the operation condition of the engine is not in the communication target condition area, adjusting the working state of the valve based on the comparison result.

Further, the working state of the valve 11 is adjusted or maintained according to whether the comparison result satisfies a predetermined condition.

Further, the method can also comprise the following steps:

the valve 11 is adjusted to be in a closed state for a second predetermined time.

Specifically, the control method for determining whether the engine is in the target condition communication region may be, for example, that the target condition communication region describes the operating condition region of the engine through the engine speed value and the engine work load, and in this operating condition region, the valve 11 is preferably controlled to be opened and maintained to maintain the communication between the intake branches on both sides of the engine. The work load here can be described by the intake air flow measured and collected by the air flow meter 3, the engine intake air pressure measured and collected by the second intake air state sensor 8 and the third intake air state sensor 10, and the engine intake air amount or the engine relative intake air amount calculated by comprehensively processing the signals measured and collected by the above sensors.

A control parameter (which may be named EnaIntksConn _ b) is set in software and electronic control data preset in the control unit 1 as a control signal basis for controlling the valve 11 to execute and maintain an open or closed state, and when EnaIntksConn _ b =1, the control valve 11 executes and maintains the open state; when EnaIntksConn _ b =0, the control valve 11 executes and maintains the closed state.

Furthermore, a control parameter data table (which may be named enaintkcnn _ MAP) is set in the software and electronic control data preset in the control unit 1, and the control parameter data table has two input control parameters, namely an engine speed value (which may be named EngSpeed _ a, corresponding to the x-axis coordinate of the data table enaintkcnn _ MAP) and an engine work load (which may be described by the average value of the intake pressure on both sides of the engine, for example, and the real-time average value of the intake pressure on both sides of the engine corresponds to the y-axis coordinate of the data table enaintkcnn _ MAP); the control parameter data table has an output control parameter, enaIntksConn _ b. An example of the control parameter data table is shown in table 1, in which the unit of the engine speed value EngSpeed _ a corresponding to the X-axis coordinate of the data table enaintkcnn _ MAP is r/min, the unit of the real-time average value PIntk12Avg _ a of the intake pressure on both sides of the engine corresponding to the y-axis coordinate of the data table enaintkcnn _ MAP is hPa, the "X" value in the data table enaintkcnn _ MAP is the corresponding output enaintksnn _ b value found according to the combination of the engine speed EngSpeed _ a describing a certain engine operation condition and the real-time average value PIntk12Avg _ a of the intake pressure on both sides of the engine, and the "X" value is 1 "(described by the combination of the engine speed value EngSpeed _ a and the average value PIntk12Avg _ a of the intake pressure on both sides of the engine) is the connected target operation condition region.

If the engine operating load is described by the average value of the intake pressure across the engine in the above control parameter table (enaintkcnn _ MAP), the parameter may be named PIntk12Avg _ a, and the calculation method is: the average value of the engine intake air pressure measured, collected, and calculated in real time based on the second intake air state sensor 8 and the third intake air state sensor 10 is as follows:

PIntk12Avg_a＝0.5*(PIntk1_a+PIntk2_a)

wherein PIntk1 — a represents an intake air pressure real-time value of the first intake branch passage on the first side of the engine measured and collected based on the second intake air state sensor 8; PIntk2_ a represents an intake pressure real-time value of the second intake branch of the second side of the engine measured and collected in real time based on the third intake state sensor 10.

In this way, during the operation of the engine, the control unit 1 may perform interpolation calculation according to the current real-time engine speed value obtained through collection, measurement and calculation and the average value of the intake pressure at two sides of the engine, with reference to the preset data in the table, to obtain the numerical result of the control parameter EnaIntksConn _ b, calculate and convert the numerical result into a corresponding control instruction, and transmit the corresponding control instruction to the valve 11 to control the valve to execute and maintain the corresponding open or close state.

Further, for the control parameter data table enaintkcnn _ MAP set in the software and the electronic control data preset in the control unit 1, the x coordinate (described by the engine speed EngSpeed _ a), the y coordinate (described by the real-time average value PIntk12Avg _ a of the intake pressure on both sides of the engine) and the value of the output control parameter EnaIntksConn _ b corresponding to the x and y axis value combination in the data table are all required to be preset by the calibration engineer according to the calibration result in the engine product development and calibration development stage of the electronic control data in the control unit 1.

TABLE 1 control parameter data Table for control parameter EnaIntksConn _ b (example)

y\x

500

1000

1500

2000

2500

3000

3500

4000

5000

6000

100

X

X

X

X

X

X

X

X

X

X

300

X

X

X

X

X

X

X

X

X

X

400

X

X

X

X

X

X

X

X

X

X

500

X

X

X

X

X

X

X

X

X

X

600

X

X

X

X

X

X

X

X

X

X

700

X

X

X

X

X

X

X

X

X

X

800

X

X

X

X

X

X

X

X

X

X

900

X

X

X

X

X

X

X

X

X

X

1000

X

X

X

X

X

X

X

X

X

X

1200

X

X

X

X

X

X

X

X

X

X

1400

X

X

X

X

X

X

X

X

X

X

1600

X

X

X

X

X

X

X

X

X

X

1800

X

X

X

X

X

X

X

X

X

X

2000

X

X

X

X

X

X

X

X

X

X

2200

X

X

X

X

X

X

X

X

X

X

2400

X

X

X

X

X

X

X

X

X

X

In a specific flow of this step, as shown in fig. 7, after the start of this step, the determination step is performed: is the valve 11 switch function enabling flag value 1? If the judgment result is 'yes', executing a judgment step: is the operating condition of the engine within the connected target condition region? If the judgment result is yes, executing step S0301: opening the valve 11; step S0302 is performed: maintaining the current on-off state of the valve 11 (the shortest duration of the maintenance is t0_ sys _ V _ L); executing judgment step SJ0303: is the operating condition of the engine out of the connected target condition region? If the determination result is yes, step S0303 is executed: closing the valve 11; the flow ends at step S03.

After the start of the flow, decision step 0301 is performed: is the valve 11 switch function enabling flag value 1? If the judgment result is yes, executing a judgment step SJ0302: is the engine operating condition within the connected target condition region? If the judgment result is yes, executing step S0301: opening the valve 11; step S0302 is performed: maintaining the current on-off state of the valve 11 (the shortest time duration of the maintenance is t0_ sys _ V _ L); executing judgment step SJ0303: is the operating condition of the engine outside of the connected target condition region? And if the judgment result is 'no', returning to and executing the judgment step SJ0301 and the subsequent flow steps according to the sequence of the steps of the control method flow.

After the flow starts, a judgment step SJ0301 is performed: is the valve 11 switch function enabling flag value 1? If the judgment result is yes, executing a judgment step SJ0302: is the engine operating condition within the communicated target condition region? If the judgment result is 'no', executing a judgment step SJ0304: PIntkDiff _ abs _ a > PIntkDiff _ V _ H? And if the judgment result is yes, executing the step S0301 and the subsequent flow steps according to the step sequence of the control method flow.

After the flow starts, a judgment step SJ0301 is performed: is the valve 11 switch function enable flag value 1? If the judgment result is yes, executing a judgment step SJ0302: is the operating condition of the engine within the communicated target condition region? If the judgment result is 'no', executing a judgment step SJ0304: PIntkDiff _ abs _ a > PIntkDiff _ V _ H? If the judgment result is 'no', executing a judgment step SJ0305: TIntkDiff _ abs _ a > TIntkDiff _ V _ H? And if the judgment result is yes, executing the step S0301 and the subsequent flow steps according to the step sequence of the control method flow.

After the flow starts, a judgment step SJ0301 is performed: is the valve 11 switch function enable flag value 1? If the judgment result is yes, executing a judgment step SJ0302: is the engine operating condition within the communicated target condition region? If the judgment result is 'no', executing a judgment step SJ0304: PIntkDiff _ abs _ a > PIntkDiff _ V _ H? If the judgment result is 'no', executing a judgment step SJ0305: TIntkDiff _ abs _ a > TIntkDiff _ V _ H? And if the judgment result is 'no', executing the step S0302 and the subsequent flow steps according to the step sequence of the control method flow.

After the process is started, a judgment step SJ0301 is performed: is the valve 11 switch function enabling flag value 1? And if the judgment result is 'no', executing the step S0303 and the subsequent flow steps according to the step sequence of the control method flow.

In order to avoid the valve 11 frequently switching between the open state and the closed state caused by the sudden change of the control parameter value, a shortest time length t0_ sys _ V _ L for maintaining the current on-off state of the valve 11 is set, after the current valve 11 changes the open or closed state, the control unit 1 needs to control and maintain the on-off state of the valve 11 unchanged, and maintain the shortest time length of the on-off state as a preset value of the control parameter t0_ sys _ V _ L. The value of the shortest time period t0_ sys _ V _ L for maintaining the current opening and closing state of the valve 11 needs to be preset by a calibration engineer according to a calibration result in the engine product development and calibration development stage of the electronic control data in the control unit 1.

The embodiment of the disclosure can selectively connect or separate the air inlet branch circuits corresponding to the cylinders on two sides when the engine operates under different working conditions, and can solve the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders on two sides of the engine caused by arranging the intercooling devices on different air inlet branch circuits.

A third embodiment of the present disclosure provides a control device of an intake system that is the intake system according to any one of the first embodiment of the present disclosure, the control device including an acquisition module, a comparison module, and an adjustment module that are coupled to each other, wherein:

the acquisition module is used for acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and an opening and closing state of the valve;

the comparison module is used for comparing the real-time working condition information with a preset threshold value to obtain a comparison result;

the adjusting module is used for adjusting the working state of the valve based on whether the running working condition of the engine is in a communication target working condition or not and the comparison result.

Further, the control device further comprises a judging module:

the judging module is used for judging whether the real-time working condition information is effective or not;

the adjusting module is also used for adjusting the valve to be in a closed state under the condition that the real-time working condition information is invalid information.

The comparison module further comprises:

a state determination unit for determining a state of the engine based on the engine speed value;

the comparison unit is used for sequentially comparing first difference values of the air inlet pressure values of different air inlet branches and second difference values of the air inlet temperature values of different air inlet branches with a preset threshold value under the condition that the engine is in a running state so as to obtain a comparison result;

the adjustment module is further configured to adjust the valve to a closed state when the engine is not operating.

The adjusting module further comprises:

the first adjusting unit is used for adjusting the valve to be in an opening state under the condition that the running working condition of the engine is in the communication target working condition area;

and the second adjusting unit is used for adjusting the working state of the valve based on the comparison result under the condition that the running working condition of the engine is not in the communication target working condition area.

The embodiment of the disclosure can selectively connect or separate the air inlet branches corresponding to the cylinders on two sides when the engine operates under different working conditions, and can solve the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders on two sides of the engine caused by arranging the intercooling device on different air inlet branches.

A fourth embodiment of the present disclosure provides a storage medium, which is a computer-readable medium storing a computer program, which when executed by a processor implements the method provided by the first embodiment of the present disclosure, including the following steps S11 to S13:

s11, acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and an opening and closing state of a valve;

s12, comparing the real-time working condition information with a preset threshold value to obtain a comparison result;

and S13, adjusting the working state of the valve based on whether the running working condition of the engine is in a communication target working condition or not and the comparison result.

Further, the computer program realizes the other methods provided by the second embodiment of the present disclosure when being executed by the processor

The embodiment of the disclosure can selectively connect or separate the air inlet branches corresponding to the cylinders on two sides when the engine operates under different working conditions, and can solve the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders on two sides of the engine caused by arranging the intercooling device on different air inlet branches.

A fifth embodiment of the present disclosure provides an electronic device, which includes at least a memory and a processor, the memory having a computer program stored thereon, the processor implementing the method provided by any of the embodiments of the present disclosure when executing the computer program on the memory. Illustratively, the electronic device computer program steps are as follows S21 to S23:

s21, acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and a valve switching state;

s22, comparing the real-time working condition information with a preset threshold value to obtain a comparison result;

and S23, adjusting the working state of the valve based on whether the running working condition of the engine is in a communication target working condition or not and the comparison result.

Further, the processor also executes the computer program in the fourth embodiment described above

The embodiment of the disclosure can selectively connect or separate the air inlet branch circuits corresponding to the cylinders on two sides when the engine operates under different working conditions, and can solve the problem of overlarge difference of air inlet flow or air inlet conditions of the cylinders on two sides of the engine caused by arranging the intercooling devices on different air inlet branch circuits.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one type of logical function division, and other division manners may be available in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated module, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer readable storage medium and can be executed by a processor to implement the steps of the embodiments of the method for controlling the torque of the motor described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U.S. disk, removable hard disk, magnetic diskette, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunications signal, and software distribution medium, etc. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

Furthermore, features of the embodiments shown in the drawings of the present application or of the various embodiments mentioned in the present description are not necessarily to be understood as embodiments independent of each other. Rather, each feature described in one example of one embodiment can be combined with one or more other desired features from other embodiments to yield yet further embodiments, which are not described in text or with reference to the accompanying drawings.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. The air inlet system of the engine comprises a main air inlet pipeline and a control unit, wherein the main air inlet pipeline is connected with a plurality of parallel air inlet branches, each air inlet branch is connected with at least one cylinder in the engine, and an air inlet intercooler is arranged on each air inlet branch.

2. The intake system according to claim 1, wherein an air flow meter, a throttle valve, and a supercharger are provided in this order on the main intake passage, the air flow meter, the throttle valve, and the supercharger are all connected to the control unit, and an air cleaner is provided upstream of the air flow meter.

3. The intake system according to claim 2, wherein an intake air state sensor is provided upstream of the throttle valve and on the intake branch, respectively.

4. A control method of an intake system that is the intake system according to any one of claims 1 to 3, characterized by comprising:

acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and a valve switching state;

comparing the real-time working condition information with a preset threshold value to obtain a comparison result;

and adjusting the working state of the valve based on whether the running working condition of the engine is in a communication target working condition or not and the comparison result.

5. The control method according to claim 4, characterized by further comprising, after said obtaining real-time operating condition information of the engine:

judging whether the real-time working condition information is effective or not;

and when the real-time working condition information is invalid information, adjusting the valve to be in a closed state.

6. The control method according to claim 4, wherein the comparing the real-time operating condition information with preset information to obtain a comparison result comprises:

determining a state of the engine based on the engine speed value;

when the engine is in a running state, sequentially comparing first difference values of air inlet pressure values of different air inlet branches and second difference values of air inlet temperature values of different air inlet branches with a preset threshold value to obtain a comparison result;

the valve is adjusted to be in a closed state when the engine is in a non-operating state.

7. The control method of claim 6, wherein said adjusting the operating state of the valve based on whether the operating condition of the engine is within the communicated target condition region and the comparison result comprises:

when the running working condition of the engine is in the communication target working condition area, adjusting the valve to be in an open state;

and under the condition that the operation working condition of the engine is not in the communication target working condition area, adjusting the working state of the valve based on the comparison result.

8. A control device of an intake system that is the intake system according to any one of claims 1 to 3, characterized by comprising:

the acquisition module is used for acquiring real-time working condition information of the engine, wherein the real-time working condition information at least comprises an engine rotating speed value, an air inlet pressure value of each air inlet branch, an air inlet temperature value of each air inlet branch and the opening and closing state of the valve;

the comparison module is used for comparing the real-time working condition information with a preset threshold value to obtain a comparison result;

and the adjusting module is used for adjusting the working state of the valve based on whether the running working condition of the engine is in a communication target working condition or not and the comparison result.

9. A storage medium storing a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 4 to 7 when executed by a processor.

10. An electronic device comprising at least a memory, a processor, the memory having a computer program stored thereon, wherein the processor, when executing the computer program on the memory, is adapted to carry out the steps of the method of any of claims 4 to 7.

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