CN110657035B - Method, device and system for transient air intake of engine - Google Patents
Method, device and system for transient air intake of engine Download PDFInfo
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- CN110657035B CN110657035B CN201910906012.3A CN201910906012A CN110657035B CN 110657035 B CN110657035 B CN 110657035B CN 201910906012 A CN201910906012 A CN 201910906012A CN 110657035 B CN110657035 B CN 110657035B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/141—Introducing closed-loop corrections characterised by the control or regulation method using a feed-forward control element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
Abstract
The invention provides a method, a device and a system for transient air intake of an engine, wherein the method comprises the following steps: acquiring working condition values of engine rotating speed, torque and front and rear pressure parameters of a throttle valve; judging the working condition state type of the engine according to the working condition values of the engine rotating speed, the torque and the pressure parameters before and after the throttle valve; and according to the working condition state type, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve so as to adjust the transient air intake of the engine. The transient air intake responsiveness of various working conditions of the engine is realized, devices such as a sensor and the like are not required to be added, the problem of insufficient power of the engine is solved on the premise of not changing the mechanical structure of the engine, and the working reliability of the engine is improved.
Description
Technical Field
The invention relates to the technical field of vehicle engines, in particular to a method, a device and a system for engine transient air intake.
Background
The gas-fired automobile is also called a natural gas automobile and mainly comprises a liquefied petroleum gas automobile and a compressed natural gas automobile. The gas automobile mainly uses natural gas as fuel. The emission of CO is reduced by more than 90 percent compared with gasoline vehicles, the emission of hydrocarbon is reduced by more than 70 percent, the emission of oxynitride is reduced by more than 35 percent, and the automobile is a practical low-emission automobile.
The engine air inlet system comprises an air filter, a pipeline, a silencer, an air inlet control element, an air inlet manifold, an air inlet valve mechanism and the like; air flows into an air filter through a bleed air pipe to filter impurities, then flows through an air flow meter, enters an air inlet manifold through an air inlet hose, is mixed with fuel such as natural gas sprayed from a nozzle to form gas mixture with a proper proportion, and is sent into a cylinder through an air inlet valve to ignite and burn to generate power. The air inlet system mainly supplies fresh air or pure air into the cylinders as much as possible, and enables the air inlet amount of the cylinders to be consistent as much as possible, so that a material basis is provided for heat conversion of each cylinder of the vehicle.
Because the natural gas engine has low charging efficiency and a certain distance is reserved between a throttle valve on an air inlet pipe and an engine cylinder, a certain delay is reserved between the set air inflow and the actual air inflow into the cylinder, the transient response of the engine is reduced, the mixed air is over-rich or over-lean, and the engine is abnormal in operation.
Disclosure of Invention
The invention provides a method, a device and a system for transient air intake of an engine, which aim to realize the transient air intake responsiveness of various working conditions of the engine, do not need to add devices such as a sensor and the like, solve the problem of insufficient power of the engine on the premise of not changing the mechanical structure of the engine and improve the working reliability of the engine.
In a first aspect, an embodiment of the present invention provides a method for engine transient air intake, including:
acquiring working condition values of engine rotating speed, torque and front and rear pressure parameters of a throttle valve;
judging the working condition state type of the engine according to the working condition values of the engine rotating speed, the torque and the pressure parameters before and after the throttle valve;
and adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gas bypass valve according to the working condition state type so as to adjust the transient air intake of the engine.
In one possible design, the operating condition state types include: acceleration condition state and deceleration condition state.
In one possible design, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the working condition state type comprises:
if the type of the working condition state is an acceleration working condition state, detecting whether the front-back pressure ratio of the throttle valve is not less than a first preset threshold value, and if the type of the working condition state is less than the first preset threshold value, increasing a configuration value of torque according to a preset rule; and if the value is larger than or equal to the first preset threshold value, increasing the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve.
In one possible design, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the working condition state type comprises:
if the type of the working condition state is a deceleration working condition state, the closed-loop control duty ratio of the waste gas bypass valve is not adjusted; or the torque of the engine is not adjusted.
In one possible design, after the configuration value of increasing the torque or the configuration value of increasing the closed-loop control feed-forward duty ratio of the waste gate valve, the method further comprises the following steps:
judging whether the engine is in a deceleration working condition state or not;
if the waste gas bypass valve is in a deceleration working condition state, setting the closed-loop control feedforward duty ratio of the waste gas bypass valve to 0; or to reset the torque of the engine to 0.
In a second aspect, an embodiment of the present invention provides an apparatus for transient air intake of an engine, including:
the acquisition module is used for acquiring the working condition values of the engine speed, the torque and the pressure parameters before and after the throttle valve;
the judging module is used for judging the working condition state type of the engine according to the working condition values of the engine rotating speed, the torque and the pressure parameters before and after the throttle valve;
and the adjusting module is used for adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gas bypass valve according to the working condition state type so as to adjust the transient air intake of the engine.
In one possible design, the operating condition state types include: acceleration condition state and deceleration condition state.
In one possible design, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the working condition state type comprises:
if the type of the working condition state is an acceleration working condition state, detecting whether the front-back pressure ratio of the throttle valve is not less than a first preset threshold value, and if the type of the working condition state is less than the first preset threshold value, increasing a configuration value of torque according to a preset rule;
and if the value is larger than or equal to the first preset threshold value, increasing the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve.
In one possible design, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the working condition state type comprises:
if the type of the working condition state is a deceleration working condition state, the closed-loop control duty ratio of the waste gas bypass valve is not adjusted; or the torque of the engine is not adjusted.
In one possible design, after the configuration value of increasing the torque or the configuration value of increasing the closed-loop control feed-forward duty ratio of the waste gate valve, the method further comprises the following steps:
judging whether the engine is in a deceleration working condition state or not;
if the waste gas bypass valve is in a deceleration working condition state, setting the closed-loop control feedforward duty ratio of the waste gas bypass valve to 0; or to reset the torque of the engine to 0.
In a third aspect, an embodiment of the present invention provides a system for transient air intake of an engine, including: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of engine transient air induction of any of the first aspects via execution of the executable instructions.
In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method for transient air intake of an engine according to any one of the first aspect.
The invention provides a method, a device and a system for transient air intake of an engine, wherein the method comprises the following steps: acquiring working condition values of engine rotating speed, torque and front and rear pressure parameters of a throttle valve; judging the working condition state type of the engine according to the working condition values of the engine rotating speed, the torque and the pressure parameters before and after the throttle valve; and adjusting the torque of the engine or the configuration value of the feed-forward duty ratio of the waste gate valve according to the working condition state type so as to adjust the transient air inlet of the engine. The transient air intake responsiveness of various working conditions of the engine is realized, devices such as a sensor and the like are not required to be added, the problem of insufficient power of the engine is solved on the premise of not changing the mechanical structure of the engine, and the working reliability of the engine is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for transient air induction of an engine according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for transient air induction of an engine according to a second embodiment of the present invention;
FIG. 3 is a flowchart of a method for transient air induction of an engine according to a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a transient air intake device of an engine according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a transient air intake system of an engine according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation 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.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
The charge efficiency of the engine is the ratio of the mass of air sucked in each intake stroke to the mass of dry air occupying the stroke volume of the cylinder piston under the standard condition (1 atmosphere, 20 ℃, density of 1.187kg/m 2).
Because the natural gas engine has low charging efficiency and a certain distance is reserved between a throttle valve on an air inlet pipe and an engine cylinder, a certain delay is caused from the set air inflow to the actual air inflow into the cylinder, and the transient response of the engine is influenced. In an alternative embodiment, the intake pressure condition parameter of the engine may be converted into an intake flow condition parameter, a power torque condition parameter, and the like.
Fig. 1 is a flowchart of a method for transient air intake of an engine according to an embodiment of the present invention, and as shown in fig. 1, the method for transient air intake of an engine according to the present embodiment may include:
and S101, acquiring working condition values of engine rotating speed, torque and pressure parameters before and after the throttle valve.
Specifically, the rotation speed of the engine is related to the number of work doing times in unit time or the effective power of the engine; the engine torque is a specific index of the acceleration capacity of the engine, and means that a piston reciprocates in a cylinder to do certain work once.
The throttle valve is one of the most important parts of an engine system of an electronic fuel injection vehicle, the throttle valve is a controllable valve for controlling air to enter the engine, and after the air enters an air inlet pipe, the air is mixed with fuel such as natural gas and the like to be changed into combustible mixed gas, so that the combustion forms work. It is connected with air filter and engine cylinder, and is called the throat of automobile engine.
In an alternative embodiment, the torque of the engine is preferably the required torque of the engine, and may be directly obtained from an electronic control unit ECU of the engine, for example, by using the opening degree of an accelerator pedal, through which the corresponding required torque can be obtained.
In the embodiment, the current working condition values of the engine speed, the torque and the pressure parameters before and after the throttle valve are obtained to judge the current working condition state type of the engine.
And S102, judging the working condition state type of the engine according to the rotating speed, the torque and the working condition values of the pressure parameters before and after the throttle valve.
Specifically, the natural gas engine obtains corresponding required torque through the opening degree of the pedal plate, then converts the required torque into required air quantity, converts the required air quantity into corresponding throttle opening degree according to the size of the required air quantity, and further controls the throttle opening degree. The Electronic foot pedal is not connected with the throttle valve by using a mechanical part, an ECU (Electronic Control Unit) receives an Electronic foot pedal position signal and converts the Electronic foot pedal position signal into a throttle valve opening signal, and the throttle valve receives an opening command signal from the ECU and feeds back the actual opening to the ECU.
The operating condition states of the engine may include an acceleration operating condition state and a deceleration operating condition state. The method is mainly characterized by the output power and the torque of the engine at different rotating speeds. Where an engine acceleration condition state refers to the ability of the engine to safely and quickly transition from a designated low thrust (or power) state to a designated high thrust (or power) state.
In the embodiment, the change rate of the torque of the engine is obtained, and then the change rate of the torque is compared with the first threshold, and if the change rate of the torque is greater than or equal to the first threshold, the current acceleration condition state of the engine is represented. The first threshold value is not particularly limited in this embodiment.
Correspondingly, the engine deceleration condition state may compare the change rate of the torque with a second threshold according to the change rate of the torque of the engine, and if the change rate of the torque is smaller than the second threshold, it indicates that the engine is currently in the deceleration condition state. The second threshold value is not particularly limited in this embodiment.
In an alternative embodiment, the rate of change of torque may be further calculated from the requested torque.
And S103, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gas bypass valve according to the working condition state type so as to adjust the transient air intake of the engine.
Specifically, the intake air amount of the natural gas engine can be determined by both a throttle valve and a supercharger wastegate valve. The waste gas bypass valve mainly comprises a three-way electromagnetic valve and a pressure regulator, wherein three ports of the three-way electromagnetic valve are respectively connected with the atmosphere, the air inlet pipe and the pressure regulator, the three-way electromagnetic valve is installed at one end communicated with the atmosphere and is a normally closed electromagnetic valve, and when the duty ratio of the electromagnetic valve is equal to 0, the port is closed. When DC% is 0, the electromagnetic valve is closed, and all compressed air is used for pushing the supercharger waste gas bypass valve to be fully opened, so that the exhaust energy for pushing the supercharger to work is reduced, and the supercharging pressure is finally reduced; when DC% is 100%, the leakage quantity of compressed air at the electromagnetic valve is maximum, the exhaust gas bypass valve of the supercharger tends to close under the action of spring force, so that the exhaust energy of the supercharger is increased, and the supercharging pressure is increased. Wherein, the configuration value of the engine torque is adjusted to represent a torque value increased based on the required torque; and adjusting the configuration value of the closed-loop control feedforward duty ratio of the waste gate valve, namely, the value for increasing the PID control feedforward duty ratio of the waste gate valve.
According to the embodiment, the torque of an engine or the configuration value of a closed-loop control feed-forward duty ratio of a supercharger waste gas bypass valve is adjusted according to the acceleration working condition or the deceleration working condition state of the engine of a vehicle, so as to adjust the transient air intake of the engine; the transient air intake responsiveness of various working conditions of the engine is realized, devices such as a sensor and the like are not required to be added, the problem of insufficient power of the engine is solved on the premise of not changing the mechanical structure of the engine, and the working reliability of the engine is improved.
Specifically, referring to fig. 2, fig. 2 is a flowchart of a method for transient air intake of an engine according to a second embodiment of the present invention, as shown in fig. 2, in the method for transient air intake of an engine according to the second embodiment, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the wastegate valve according to the operating condition state type includes:
and if the type of the working condition state is an acceleration working condition state, detecting whether the front-back pressure ratio of the throttle valve is not less than a first preset threshold, and if the front-back pressure ratio of the throttle valve is less than the first preset threshold, increasing the configuration value of the torque according to a preset rule so as to adjust the transient air intake of the engine. And if the value is larger than or equal to the first preset threshold value, increasing the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve.
If the type of the working condition state is a deceleration working condition state, the closed-loop control duty ratio of the waste gas bypass valve is not adjusted, namely the configuration value is 0; or the torque of the engine is not adjusted, namely the configuration value is 0.
Wherein the throttle front-rear pressure ratio represents a ratio of the throttle rear pressure to the throttle front pressure. The air inflow of the natural gas engine is determined by a throttle valve and a supercharger waste gas bypass valve together, the waste gas bypass valve on the natural gas engine acts after the pressure ratio before and after the throttle valve is larger than a certain value, before the pressure ratio is smaller than the pressure ratio, the air inflow is controlled by the throttle valve according to a throttling formula, when the pressure ratio is larger than a certain value, the waste gas bypass valve participates in working, the air inflow is controlled by the throttle valve and a waste gas valve together, when the pressure ratio is continuously increased until the throttle valve enters a non-throttling area (the pressure ratio is larger than 0.95), at the moment, the throttle valve cannot influence the air inflow by adjusting the opening degree, and the air inflow needs to be controlled by adjusting the waste gas bypass valve to control the feedforward duty ratio in a closed-loop mode.
In an alternative embodiment, the vehicle engine throttle is operated by the driver via an accelerator pedal to vary the amount of intake air to the engine to control the operation of the engine. Different throttle openings may indicate different operating conditions.
In the embodiment, the change rate of the torque of the engine is obtained, and then the change rate of the torque is compared with the first threshold, and if the change rate of the torque is greater than or equal to the first threshold, the current acceleration condition state of the engine is represented. And then detecting whether the front-rear pressure ratio of the throttle valve is not less than a first preset threshold value, and if the front-rear pressure ratio of the throttle valve is less than the first preset threshold value, increasing the configuration value of the torque according to a preset rule so as to adjust the transient air intake of the engine. Increasing the correction torque based on the required torque, and then gradually ramp to 0; for example, the correction torque is increased to 5N × m based on the required torque, i.e., the correction torque is the configuration value. The time constant T2 of ramp and the value of the correction torque Trq are obtained by checking the MAP according to the engine speed and the required torque, and the time delay of engine air intake generated by the pipeline distance from the throttle valve to the cylinder under different speeds and loads is referred to. The MAP of the engine represents an array, which may be a two-dimensional array, for example, the air supply continuation angle MAP is a two-dimensional MAP, the x-axis is the engine speed, the y-axis is the load, the found value is the value at the intersection of the two axes, and the air supply continuation angle setting under a certain load condition at a certain speed is reflected. The engine MAP is defined as a table look-up to obtain a corresponding control parameter value under a certain precondition.
And if the value is larger than or equal to the first preset threshold value, increasing the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve. And adding a feedforward duty ratio to the PID control of the waste gas bypass valve, and then gradually ramp to 0 by the feedforward duty ratio, wherein the increased feedforward duty ratio value is the configuration value. The time constant T1 of ramp and the value of the feedforward duty ratio PreCtl are obtained by checking MAP according to the engine speed and the required torque, and the time delay generated by the pipeline distance from the supercharger to the cylinder of the engine air inlet under different speeds and loads is required to be referred. The first preset threshold value can be reasonably set by taking the pressure ratio of the waste gate valve participating in control as a reference datum.
Correspondingly, the engine deceleration condition state may compare the change rate of the torque with a second threshold according to the change rate of the torque of the engine, and if the change rate of the torque is smaller than the second threshold, it indicates that the engine is currently in the deceleration condition state. Further, the closed-loop control duty ratio of the waste gas bypass valve is not adjusted, namely the configuration value is 0; or the torque of the engine is not adjusted, namely the configuration value is 0.
In an alternative embodiment, the engine may detect that the acceleration condition state and the deceleration condition state alternately occur, for example, the vehicle engine performs the acceleration condition state first and then performs the deceleration condition state, and the engine adjusts the torque of the engine or the configuration value of the waste gate valve closed-loop control feed-forward duty ratio according to the specific condition state type to adjust the transient air intake of the engine.
Referring to fig. 3 in detail, fig. 3 is a flowchart of a method for transient air intake of an engine according to a third embodiment of the present invention, as shown in fig. 3, in the method for transient air intake of an engine according to the third embodiment of the present invention, the adjusting a torque of the engine or a configuration value of a closed-loop control feed-forward duty ratio of a wastegate valve according to a type of a working condition state may include, for example, a configuration value of increasing the torque or a configuration value of increasing the closed-loop control feed-forward duty ratio of the wastegate valve, and further includes the following steps:
judging whether the engine is in a deceleration working condition state or not;
if the waste gas bypass valve is in the deceleration working condition state, setting the closed-loop control feedforward duty ratio of the waste gas bypass valve to 0; or to reset the torque of the engine to 0. And comparing the change rate of the torque with a second threshold value according to the change rate of the torque of the engine in the deceleration working condition state, and if the change rate of the torque is smaller than the second threshold value, indicating that the engine is in the deceleration working condition state currently. Further setting the feedforward duty ratio of the closed-loop control of the waste gate valve to 0; or to reset the torque of the engine to 0.
The embodiment is not limited to the case that one acceleration condition state and one deceleration condition state of the engine alternately occur as shown in fig. 3, and those skilled in the art can specifically limit the times of the acceleration condition state and the deceleration condition state and the occurrence sequence according to actual conditions, so as to achieve better effect. The transient air intake responsiveness of various working conditions of the engine is realized, devices such as a sensor and the like are not required to be added, the problem of insufficient power of the engine is solved on the premise of not changing the mechanical structure of the engine, and the working reliability of the engine is improved.
Fig. 4 is a schematic structural diagram of an engine transient air intake apparatus according to a fourth embodiment of the present invention, and as shown in fig. 4, the engine transient air intake apparatus in this embodiment may include:
the acquisition module 21 is used for acquiring the working condition values of the engine speed, the torque and the pressure parameters before and after the throttle valve;
the judging module 22 is used for judging the working condition state type of the engine according to the working condition values of the engine rotating speed, the torque and the pressure parameters before and after the throttle valve;
and the adjusting module 23 is used for adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the working condition state type so as to adjust the transient air intake of the engine.
In an alternative embodiment, the operating condition status types include: acceleration condition state and deceleration condition state.
In an alternative embodiment, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the type of the working condition state comprises:
if the type of the working condition state is an acceleration working condition state, detecting whether the front-back pressure ratio of the throttle valve is not less than a first preset threshold value, and if the front-back pressure ratio of the throttle valve is less than the first preset threshold value, increasing a configuration value of torque according to a preset rule;
and if the value is larger than the first preset threshold value, increasing the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve.
In an alternative embodiment, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the type of the working condition state comprises:
if the type of the working condition state is a deceleration working condition state, the closed-loop control feedforward duty ratio of the waste gas bypass valve is not adjusted; or the torque of the engine is not adjusted.
In an alternative embodiment, after the configuration value of the torque is increased or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve is increased, the method further comprises the following steps:
judging whether the engine is in a deceleration working condition state or not;
if the waste gas bypass valve is in the deceleration working condition state, setting the closed-loop control feedforward duty ratio of the waste gas bypass valve to 0; or to reset the torque of the engine to 0.
The device for engine transient air intake of the present embodiment may implement the technical solutions in the methods shown in fig. 1 to fig. 3, and the specific implementation processes and technical principles thereof refer to the relevant descriptions in the methods shown in fig. 1 to fig. 3, and are not described herein again.
Fig. 5 is a schematic structural diagram of a transient air intake system of an engine according to a fifth embodiment of the present invention, and as shown in fig. 5, the transient air intake system 30 of the engine according to the present embodiment may include: a processor 31 and a memory 32.
A memory 32 for storing computer programs (e.g., applications, functional modules, etc. implementing the above-described engine transient air induction methods), computer instructions, etc.;
the computer programs, computer instructions, etc. described above may be stored in one or more memories 32 in partitions. And the above-mentioned computer program, computer instructions, data, etc. can be called by the processor 31.
A processor 31 for executing the computer program stored in the memory 32 to implement the steps of the method according to the above embodiments.
Reference may be made in particular to the description relating to the preceding method embodiment.
The processor 31 and the memory 32 may be separate structures or may be integrated structures integrated together. When the processor 31 and the memory 32 are separate structures, the memory 32 and the processor 31 may be coupled by a bus 33.
The server in this embodiment may execute the technical solutions in the methods shown in fig. 1 to fig. 3, and the specific implementation processes and technical principles thereof refer to the relevant descriptions in the methods shown in fig. 1 to fig. 3, which are not described herein again.
In addition, embodiments of the present application further provide a computer-readable storage medium, in which computer-executable instructions are stored, and when at least one processor of the user equipment executes the computer-executable instructions, the user equipment performs the above-mentioned various possible methods.
Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in a communication device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method of transient air induction for an engine, comprising:
acquiring working condition values of engine rotating speed, torque and front and rear pressure parameters of a throttle valve;
judging the working condition state type of the engine according to the working condition values of the engine rotating speed, the torque and the pressure parameters before and after the throttle valve; the working condition state types comprise: an acceleration working condition state and a deceleration working condition state;
according to the working condition state type, adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve so as to adjust the transient air intake of the engine;
the adjusting of the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve according to the working condition state type comprises the following steps: if the type of the working condition state is an acceleration working condition state, detecting whether the front-back pressure ratio of the throttle valve is not less than a first preset threshold value, and if the type of the working condition state is less than the first preset threshold value, increasing a configuration value of torque according to a preset rule;
and if the value is larger than or equal to the first preset threshold value, increasing the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve.
2. The method of claim 1, wherein adjusting the torque of the engine or the wastegate valve closed loop control feed forward duty cycle configuration value according to the operating condition state type comprises:
if the type of the working condition state is a deceleration working condition state, the closed-loop control duty ratio of the waste gas bypass valve is not adjusted; or the torque of the engine is not adjusted.
3. The method of claim 1, further comprising, after increasing the torque configuration value or increasing the wastegate valve closed-loop control feed forward duty cycle configuration value:
judging whether the engine is in a deceleration working condition state or not;
if the waste gas bypass valve is in a deceleration working condition state, setting the closed-loop control feedforward duty ratio of the waste gas bypass valve to 0; or to reset the torque of the engine to 0.
4. An apparatus for transient air induction in an engine, comprising:
the acquisition module is used for acquiring the working condition values of the engine speed, the torque and the pressure parameters before and after the throttle valve;
the judging module is used for judging the working condition state type of the engine according to the working condition values of the engine rotating speed, the torque and the pressure parameters before and after the throttle valve; the working condition state types comprise: an acceleration working condition state and a deceleration working condition state;
the adjusting module is used for adjusting the torque of the engine or the configuration value of the closed-loop control feed-forward duty ratio of the waste gas bypass valve according to the working condition state type so as to adjust the transient air intake of the engine;
the adjusting module is specifically configured to detect whether a front-rear pressure ratio of the throttle valve is not smaller than a first preset threshold value if the type of the operating condition state is an acceleration operating condition state, and increase a configuration value of a torque according to a preset rule if the type of the operating condition state is smaller than the first preset threshold value;
and if the value is larger than or equal to the first preset threshold value, increasing the configuration value of the closed-loop control feed-forward duty ratio of the waste gate valve.
5. The apparatus of claim 4, wherein adjusting the torque of the engine or the wastegate valve closed loop control feed forward duty cycle configuration value according to the operating condition state type comprises:
if the type of the working condition state is a deceleration working condition state, the closed-loop control duty ratio of the waste gas bypass valve is not adjusted; or the torque of the engine is not adjusted.
6. The apparatus of claim 4, further comprising, after increasing the torque configuration value or increasing the wastegate valve closed-loop control feed forward duty cycle configuration value:
judging whether the engine is in a deceleration working condition state or not;
if the speed is in the deceleration working condition state, resetting the closed-loop control feedforward duty ratio of the waste gas bypass valve to be 0; or to reset the torque of the engine to 0.
7. A system for transient intake of an engine, comprising: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of engine transient air induction of any of claims 1-3 via execution of the executable instructions.
8. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method of transient air induction of an engine of any one of claims 1-3.
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| CN111814263A (en) * | 2020-02-21 | 2020-10-23 | 北京航空航天大学 | Compressor blade working mode judging method, calculating equipment and readable storage medium |
| CN114575994B (en) * | 2020-11-30 | 2023-05-16 | 上海汽车集团股份有限公司 | Noise control method and device for electric control turbocharger |
| CN114151209B (en) * | 2021-11-17 | 2023-07-18 | 潍柴动力股份有限公司 | Engine throttle opening control method, device, electronic equipment and storage medium |
| CN114370344B (en) * | 2022-01-19 | 2023-03-21 | 潍柴动力股份有限公司 | Engine air intake control method |
| CN114810405B (en) * | 2022-05-19 | 2023-05-23 | 潍柴动力股份有限公司 | Control method and device |
| CN115263532B (en) * | 2022-08-31 | 2024-01-12 | 重庆长安汽车股份有限公司 | Control method and system of Miller cycle engine and automobile |
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