CN114486264A - Method, system, storage medium and electronic device for controlling engine load - Google Patents
Method, system, storage medium and electronic device for controlling engine load Download PDFInfo
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Abstract
The invention discloses a method and a system for controlling engine load, a storage medium and an electronic device. The method of engine load control includes: detecting and obtaining load parameter information of the engine, wherein the load parameter information at least comprises: a target value for a load parameter characterizing the engine, and an actual value for a load parameter characterizing the engine; calculating a deviation value between a target value and an actual value of the load parameter; acquiring preset value information, wherein the preset value information is used for representing an allowable value of the deviation value; and generating control information based on the deviation value and the preset value information, wherein the control information is used for adjusting one of the opening degree value of the throttle valve and the opening degree value of the supercharger to change the actual value of the load parameter. The invention solves the technical problem of poor engine load control effect in the prior art.
Description
Technical Field
The invention relates to the technical field of engine equipment, in particular to a method, a system, a storage medium and an electronic device for controlling engine load.
Background
With the continuous application of new engine technologies, the engine bench test method and the engine bench test technology also need to be innovated continuously, the engine test is more and more complex, the workload is increased by geometric multiples, the traditional manual test cannot meet the actual requirements, and the automation of the test is increasingly emphasized by engineering testers.
In engine automation testing, one of the most common control variables is engine load. The load parameters are not fixed but vary with the test requirements, and there are usually variables representing load such as throttle, relative charge, torque, intake manifold pressure, etc. The control methods used by different load parameters are different, in the prior art, the throttle valve (throttle valve) of the engine is usually adjusted through a rack system to realize load control, but different load parameters are different along with the change rule of the throttle opening, the PID parameters of the throttle controller need to be debugged according to the types of the load parameters in the use process, the PID parameter debugging difficulty coefficient is large and complex, the phenomenon of control diffusion and non-regression is easy to occur, and the engine is damaged due to the fact that the engine is out of control. In addition, if the supercharged engine is a brand-new developed supercharged engine, the control of the load usually involves the control of an accelerator and a supercharger, so that the problem of controlling two parameters simultaneously occurs, and the bench system can only control one parameter but cannot control the two parameters simultaneously, so that the existing control method cannot meet the test requirements. In automatic tests, the control of the load is particularly important, and if the load control is unstable or inaccurate, the test cannot be carried out.
Therefore, in the prior art, how to stably and accurately control the load of the supercharged engine becomes a key problem at present. In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a method, a system, a storage medium and an electronic device for controlling engine load, which are used for at least solving the technical problem of poor engine load control effect in the related art.
According to one embodiment of the present invention, there is provided a method of engine load control, including: detecting and obtaining load parameter information of the engine, wherein the load parameter information at least comprises: a target value for a load parameter characterizing the engine, and an actual value for a load parameter characterizing the engine; calculating a deviation value between a target value and an actual value of the load parameter; acquiring preset value information, wherein the preset value information is used for representing an allowable value of the deviation value; and generating control information based on the deviation value and the preset value information, wherein the control information is used for adjusting one of the opening degree value of the throttle valve and the opening degree value of the supercharger to change the actual value of the load parameter.
Optionally, the generating control information based on the deviation value and the preset value information includes: acquiring a first preset value, wherein the first preset value is used for representing a maximum positive deviation value; judging whether the deviation value is greater than a first preset value or not, and acquiring an opening value of the throttle valve under the condition that the deviation value is determined to be greater than the first preset value; generating first control information based on the opening degree value of the throttle valve, wherein the first control information includes at least one of: positively adjusting the opening degree value of the throttle valve, negatively adjusting the opening degree value of the supercharger, and keeping the opening degree value of the supercharger unchanged.
Optionally, the method further comprises: acquiring a second preset value, wherein the second preset value is used for representing the minimum negative deviation value; under the condition that the deviation value is determined to be smaller than or equal to the first preset value, judging whether the deviation value is smaller than a second preset value; under the condition that the deviation value is determined to be smaller than a second preset value, acquiring an opening value of the supercharger; generating second control information based on the opening value of the supercharger, wherein the second control information comprises at least one of the following: adjusting the opening degree value of the throttle valve in a negative direction, keeping the opening degree value of the throttle valve unchanged, and adjusting the opening degree value of the supercharger in a positive direction; generating third control information based on the deviation value in the case that it is determined that the deviation value is greater than or equal to the second preset value, wherein the third control information includes at least one of: the opening degree value of the supercharger and the opening degree value of the throttle are kept unchanged.
Optionally, generating the first control information based on the opening degree value of the throttle valve includes: judging whether the first ratio is larger than a first preset ratio or not based on the opening degree value of the throttle valve, and acquiring the opening degree value of the supercharger under the condition that the first ratio is larger than the first preset ratio, wherein the first ratio is used for representing the ratio of the opening degree value of the throttle valve to the maximum opening degree value of the throttle valve; generating fourth control information based on the opening value of the supercharger, the fourth control information including one of: negatively adjusting the opening degree value of the supercharger and keeping the opening degree value of the supercharger unchanged; in the case where it is determined that the first ratio is less than or equal to the first preset ratio, the opening value of the throttle valve is positively adjusted.
Optionally, generating the fourth control information based on the opening value of the supercharger comprises: judging whether the second ratio is smaller than a second preset ratio or not based on the opening degree value of the supercharger, and keeping the opening degree value of the supercharger unchanged under the condition that the first ratio is smaller than the second preset ratio, wherein the second ratio is used for representing the ratio of the opening degree value of the supercharger to the maximum opening degree value of the supercharger; and under the condition that the second ratio is determined to be larger than or equal to a second preset ratio, the opening value of the supercharger is adjusted in a negative direction.
Optionally, generating the second control information based on the opening value of the supercharger comprises: judging whether the second ratio is larger than a third preset ratio or not based on the opening degree value of the supercharger, and acquiring the opening degree value of the throttle valve under the condition that the second ratio is larger than the third preset ratio; generating fifth control information based on the opening degree value of the throttle valve, the fifth control information including one of: negatively adjusting the opening degree value of the throttle valve and keeping the opening degree value of the throttle valve unchanged; and under the condition that the second ratio is determined to be smaller than or equal to a third preset ratio, positively adjusting the opening value of the supercharger.
Alternatively, the generating of the fifth control information based on the opening degree value of the throttle valve includes: judging whether the first ratio is larger than a fourth preset ratio or not based on the opening degree value of the throttle valve, and regulating the opening degree value of the throttle valve in a negative direction under the condition that the first ratio is larger than the fourth preset ratio; in the case where it is determined that the first ratio is less than or equal to the fourth preset ratio, the opening value of the throttle valve is kept unchanged.
There is also provided, in accordance with an embodiment of the present invention, an engine load control system, including: the acquisition module is used for acquiring the load parameter information at a preset frequency; the processing module is used for generating control information based on the load parameter information; a control module to adjust one of an opening value of the throttle valve and an opening value of the supercharger to change an actual value of the load parameter based on the control information.
According to an embodiment of the present invention, there is also provided a non-volatile storage medium having a computer program stored therein, wherein the computer program is arranged to perform the method of engine load control in any of the preceding when run.
According to an embodiment of the present invention, there is also provided an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method for controlling engine load through the computer program.
In the embodiment of the invention, the load parameter information of the engine is obtained by detection, the preset value information is obtained by calculating the deviation value between the target value and the actual value of the load parameter, the preset value information is used for representing the allowable value of the deviation value, and the control information is generated based on the deviation value and the preset value information, wherein the control information is used for adjusting one of the opening value of the throttle valve and the opening value of the supercharger to change the actual value of the load parameter, so that the aim of automatically and quickly stably controlling the load parameter is fulfilled, an engineering tester is not required to adjust the engine for multiple times to keep the load parameter stable, the engine is prevented from being out of control or even damaged due to the instability of the load parameter, and the fluctuation range of the load parameter is controllable to meet different test requirements. By adopting the technical scheme, when the load parameters fluctuate, the load parameters can be quickly returned to the allowable range, and the technical problem of poor engine load control effect in the related art is solved.
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The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a block diagram of the hardware architecture of a computer terminal for a method of engine load control according to an alternate embodiment of the present invention;
FIG. 2 is a flow chart of a method of engine load control according to an alternate embodiment of the present invention;
FIG. 3 is a schematic illustration of a method of engine load control according to an alternate embodiment of the present invention;
FIG. 4 is a logic diagram of a method of engine load control according to an alternate embodiment of the present invention;
FIG. 5 is a block diagram of an engine load control system according to an alternate embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above 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 capable of operation in sequences other than those illustrated or 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 engine load is required to be quickly, accurately and stably controlled in the engine bench test process. The load parameter control is usually realized by controlling the opening degree of an engine throttle, but in some tests, the load parameter is not the opening degree of the throttle, but parameters such as intake pressure, relative air charging quantity, torque and the like. Because the work of the engine is a heat release working process with unstable combustion, in order to make the load parameter stable and accurate, the opening of the accelerator needs to be continuously adjusted, if the PID parameter of the load controller is unreasonable, the states of inaccurate and unstable load control, slow reaction and the like can occur, and the state of out of control can be reached in serious cases. In addition, if the engine is provided with a supercharger, the load control needs to control not only the opening degree of a throttle valve but also the opening degree of the supercharger, and the rack system can only control one parameter, so that the accurate control of the load in a supercharging state cannot be realized. Wherein, the throttle opening is the throttle opening.
The most common method at present is to use the rotation speed/load function of the gantry system itself. Firstly, an engine control system needs to be preset, the opening degree of a supercharger and the opening degree of an accelerator pedal are linearly related, the supercharging opening degree is controlled according to a certain rule along with the opening degree of the pedal, and secondly, the linear control of the engine load along with the opening degree of the accelerator is realized by debugging PID parameters of a rack load control system. However, various problems can occur in practical use, and under different rotating speeds, because the linearity of the opening degree of the accelerator and the load of the engine is different, and meanwhile, the rack load control system can only apply one set of PID parameters, and the set of parameters are difficult to adapt to various working conditions of the engine, so that the states of overshoot, runaway or slow reaction can occur in some working conditions, the engine is controlled unstably or in an extremely dangerous condition, and the engine and test equipment can be damaged in severe cases. In addition, when an engine is replaced or a control target parameter is changed each time, the PID parameter of the rack load control system needs to be debugged to adapt to a new control variable, the debugging process is complex, relevant parameters are difficult to debug without certain control experience, the debugging difficulty coefficient is high, and the use is extremely inconvenient.
Therefore, there is a need for a method and a system for controlling engine load, which is not limited by the type of load parameters, the type of engine (supercharging or natural air suction), and the system parameters need not to be adjusted secondarily during the use process, and only needs to be set correctly and correspondingly for various required parameters, so as to realize the rapid, accurate and stable control of the load under various load control requirements. The accurate control of load is particularly important for automatic test, so that the automatic test is safe and reliable, the test efficiency is greatly improved, and the aims of cost reduction and efficiency improvement are fulfilled.
By adopting the method for controlling the engine load, accurate control of various types of engine load parameters can be realized, the method is simple to use, safe and reliable, is not limited by machine types and load parameters, does not need to carry out secondary debugging on system parameters, can be used for skillfully mastering the using method through simple learning, is accurate in control and rapid in reaction, and cannot cause the phenomenon that the engine is out of control.
In accordance with one embodiment of the present invention, there is provided an embodiment of a method of engine load control, wherein the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions, and wherein, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
The method embodiments may be performed in an electronic device or similar computing device that includes a memory and a processor in a vehicle. Taking the example of an electronic device operating on a vehicle, as shown in fig. 1, the electronic device of the vehicle may include one or more processors 102 (the processors may include, but are not limited to, Central Processing Units (CPUs), Graphics Processing Units (GPUs), Digital Signal Processing (DSP) chips, Microprocessors (MCUs), programmable logic devices (FPGAs), neural Network Processors (NPUs), Tensor Processors (TPUs), Artificial Intelligence (AI) type processors, etc.) and a memory 104 for storing data. Optionally, the electronic device of the automobile may further include a transmission device 106, an input-output device 108, and a display device 110 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 1 is merely an illustration and is not intended to limit the structure of the electronic device of the vehicle. For example, the electronic device of the vehicle may also include more or fewer components than described above, or have a different configuration than described above.
The memory 104 can be used for storing computer programs, for example, software programs and modules of application software, such as computer programs corresponding to the information processing method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer programs stored in the memory 104, that is, implementing the information processing method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
The display device 110 may be, for example, a touch screen type Liquid Crystal Display (LCD) and a touch display (also referred to as a "touch screen" or "touch display screen"). The liquid crystal display may enable a user to interact with a user interface of the mobile terminal. In some embodiments, the mobile terminal has a Graphical User Interface (GUI) with which a user can interact by touching finger contacts and/or gestures on a touch-sensitive surface, where the human-machine interaction function optionally includes the following interactions: executable instructions for creating web pages, drawing, word processing, making electronic documents, games, video conferencing, instant messaging, emailing, call interfacing, playing digital video, playing digital music, and/or web browsing, etc., for performing the above-described human-computer interaction functions, are configured/stored in one or more processor-executable computer program products or readable storage media.
In the present embodiment, a method for controlling engine load of an electronic device operating in a vehicle is provided, and fig. 2 is a flowchart of a method for controlling engine load according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S10, detecting and obtaining load parameter information of the engine, wherein the load parameter information at least comprises: a target value for a load parameter characterizing the engine, and an actual value for a load parameter characterizing the engine;
step S20, calculating a deviation value between the target value and the actual value of the load parameter;
step S30, acquiring preset value information, wherein the preset value information is used for representing an allowable value of the deviation value;
step S40, generating control information based on the deviation value and the preset value information, wherein the control information is used for adjusting one of the opening degree value of the throttle valve and the opening degree value of the supercharger to change the actual value of the load parameter;
through the steps, load parameter information of the engine is obtained through detection, preset value information is obtained through calculating a deviation value between a target value and an actual value of the load parameter, the preset value information is used for representing an allowable value of the deviation value, and control information is generated based on the deviation value and the preset value information, wherein the control information is used for adjusting one of an opening value of a throttle valve and an opening value of a supercharger to change the actual value of the load parameter, so that the purpose of automatically and quickly stabilizing the load parameter is achieved, engineering testers do not need to adjust the engine for multiple times to keep the load parameter stable, the phenomenon that the engine is out of control or even damaged due to instability of the load parameter is avoided, and the fluctuation range of the load parameter is controllable, so that different test requirements are met. By adopting the technical scheme of the application, when the load parameter fluctuates, the load parameter can be quickly returned to the allowable range, and the technical problem of poor engine load control effect in the related art is solved.
Optionally, in step S40, generating the control information based on the deviation value and the preset value information includes the following steps:
step S41, acquiring a first preset value, wherein the first preset value is used for representing the maximum positive deviation value;
and step S42, judging whether the deviation value is larger than a first preset value, and acquiring the opening degree value of the throttle valve under the condition that the deviation value is determined to be larger than the first preset value.
Specifically, the deviation value is a difference between a target value and an actual value of the load parameter. When the deviation value is larger than the first preset value, the target value is larger than the actual value.
For example, the load parameter of the engine is an intake air amount, the target value of the intake air amount is 300kg, the first preset value is 20kg, and when the detected actual value is 260kg, the deviation value is 40kg greater than the first preset value by 20kg, and at this time, the opening value of the throttle valve needs to be acquired so as to further control the opening value of the throttle valve to adjust the actual value.
In the present embodiment, the opening value of the throttle valve is positively correlated with the intake air amount, that is, the larger the opening value of the throttle valve is, the larger the intake air amount is. The opening degree value of the supercharger is inversely correlated with the intake air amount, i.e., the larger the opening degree value of the supercharger is, the smaller the intake air amount is.
Step S43, generating first control information based on the opening degree value of the throttle valve, wherein the first control information includes at least one of: positively adjusting the opening degree value of the throttle valve, negatively adjusting the opening degree value of the supercharger, and keeping the opening degree value of the supercharger unchanged.
In other words, when the deviation value is larger than the first preset value, that is, the target value is larger than the actual value, at least one of positively adjusting the opening value of the throttle valve, negatively adjusting the opening value of the supercharger, and keeping the opening value of the supercharger unchanged is performed to change the actual value of the load parameter.
Optionally, the method further comprises the following performing steps:
step S44, acquiring a second preset value, wherein the second preset value is used for representing the minimum negative deviation value;
step S45, under the condition that the deviation value is determined to be less than or equal to the first preset value, judging whether the deviation value is less than a second preset value; step S46, acquiring the opening degree value of the supercharger under the condition that the deviation value is smaller than a second preset value;
specifically, in the case where the deviation value is less than or equal to the first preset value, when the deviation value is less than the first preset value, that is, when the target value is less than the actual value. For example, the load parameter of the engine is the intake air amount, the target value of the intake air amount is 300kg, the second preset value is-20 kg, and when the detected actual value is 340kg, the deviation value is-40 kg larger than the second preset value-20 kg, at this time, the opening value of the supercharger needs to be acquired, so as to further control the opening value of the supercharger to adjust the actual value.
Step S47, generating second control information based on the opening value of the supercharger, wherein the second control information includes at least one of: adjusting the opening degree value of the throttle valve in a negative direction, keeping the opening degree value of the throttle valve unchanged, and adjusting the opening degree value of the supercharger in a positive direction;
in other words, when the deviation value is smaller than the first preset value, that is, when the target value is smaller than the actual value, at least one of negatively adjusting the opening degree value of the throttle valve, keeping the opening degree value of the throttle valve unchanged, and positively adjusting the opening degree value of the supercharger is controlled to change the actual value of the load parameter.
Step S48, in case that the deviation value is determined to be greater than or equal to the second preset value, generating third control information based on the deviation value, wherein the third control information includes at least one of: the opening degree value of the supercharger and the opening degree value of the throttle are kept unchanged.
That is, in the case where the deviation value is less than or equal to the first preset value and greater than or equal to the second preset value, the actual value and the target value of the load parameter are within the allowable tolerance band interval, and at this time, the opening degree value of the supercharger and the opening degree value of the throttle should be kept constant.
In one exemplary embodiment, the generating of the first control information based on the opening degree value of the throttle valve in step S43 includes:
step S431, judging whether the first ratio is larger than a first preset ratio or not based on the opening degree value of the throttle valve, and acquiring the opening degree value of the supercharger under the condition that the first ratio is larger than the first preset ratio, wherein the first ratio is used for representing the ratio of the opening degree value of the throttle valve to the maximum opening degree value of the throttle valve;
in one exemplary embodiment, the first predetermined ratio is preferably 95%. Step S431 may be understood as acquiring the opening degree value of the supercharger when the ratio of the current opening degree value of the throttle valve to the maximum opening degree value of the throttle valve is greater than 95%.
Step S432 of generating fourth control information based on the opening degree value of the supercharger, the fourth control information including one of: negatively adjusting the opening degree value of the supercharger and keeping the opening degree value of the supercharger unchanged;
for example, when the load parameter is the intake air amount and the first ratio is greater than 95%, adjusting the opening value of the throttle valve cannot significantly improve the intake air amount, and at this time, expanding the intake air amount is realized based on the change in the opening value of the supercharger. In step S433, in the case where it is determined that the first ratio is less than or equal to the first preset ratio, the opening degree value of the throttle valve is positively adjusted.
For example, when the load parameter is the intake air amount and the first ratio is less than or equal to 95%, the intake air amount may be expanded by directly adjusting the opening value of the throttle valve.
In one exemplary embodiment, the generating of the fourth control information based on the opening degree value of the supercharger in step S432 includes:
judging whether the second ratio is smaller than a second preset ratio or not based on the opening degree value of the supercharger, and keeping the opening degree value of the supercharger unchanged under the condition that the first ratio is smaller than the second preset ratio, wherein the second ratio is used for representing the ratio of the opening degree value of the supercharger to the maximum opening degree value of the supercharger;
and under the condition that the second ratio is determined to be larger than or equal to a second preset ratio, the opening value of the supercharger is adjusted in a negative direction.
Preferably, the second preset ratio is set to 1%. For example, when the ratio of the opening degree value of the supercharger to the maximum opening degree value of the supercharger is less than 1%, because the opening degree value of the supercharger is in negative correlation with the intake air amount, the change of the opening degree value of the supercharger is difficult to obviously expand the intake air amount (the deviation value is greater than the positive deviation, namely the target value is greater than the actual value, and the target value needs to be expanded so as to keep the deviation value and the actual value within the allowable tolerance band interval), which means that the load parameter control reaches the limit state at the moment, and in this state, the engine load parameter control system timely gives an alarm and records so that engineering personnel can follow the load parameter control in time. When the second ratio is greater than or equal to 1%, the opening value of the supercharger can be adjusted in a negative direction to enlarge the air inflow, so that the actual value can be automatically and quickly adjusted.
In one exemplary embodiment, the generating of the second control information based on the opening degree value of the supercharger in step S47 includes:
step S471, judging whether the second ratio is larger than a third preset ratio or not based on the opening degree value of the supercharger, and acquiring the opening degree value of the throttle valve under the condition that the second ratio is larger than the third preset ratio;
in step S472, fifth control information is generated based on the opening degree value of the throttle valve, the fifth control information including one of: negatively adjusting the opening degree value of the throttle valve and keeping the opening degree value of the throttle valve unchanged;
in step S473, the opening degree value of the supercharger is positively adjusted in the case where it is determined that the second ratio is smaller than or equal to the third preset ratio.
Preferably, the third predetermined ratio is set to 95%.
Specifically, when the deviation value is smaller than the negative deviation, that is, when the actual value is larger than the target value, the actual value needs to be reduced to be within a reasonable error interval range, it is first determined whether the ratio of the opening value of the supercharger to the maximum opening value is larger than 95%, and when the second ratio is larger than 95%, it is difficult to significantly reduce the actual value by adjusting the opening value of the supercharger (the opening value of the supercharger and the actual value are in negative correlation, and the opening value of the throttle and the actual value are in positive correlation), and at this time, the opening value of the throttle needs to be obtained to adjust the deviation value. When the second ratio is less than or equal to 95%, the opening degree value of the supercharger can be directly adjusted in the forward direction.
In one exemplary embodiment, the generating of the fifth control information based on the opening degree value of the throttle valve in step S472 includes:
judging whether the first ratio is larger than a fourth preset ratio or not based on the opening degree value of the throttle valve, and regulating the opening degree value of the throttle valve in a negative direction under the condition that the first ratio is larger than the fourth preset ratio;
in the case where it is determined that the first ratio is less than or equal to the fourth preset ratio, the opening value of the throttle valve is kept unchanged.
Preferably, the fourth preset ratio is set to 2%.
And when the second ratio is greater than 95%, acquiring the opening degree value of the throttle valve, judging whether the ratio of the current opening degree value of the throttle valve to the maximum opening degree value is greater than 2%, and when the ratio is greater than 2%, directly and negatively adjusting the opening degree value of the throttle valve. When the ratio is less than or equal to 2%, the load parameter control reaches the limit state, and in the state, the engine load parameter control system gives an alarm and records in time so that engineering personnel can follow the control in time.
It should be noted that the positive adjustments in the above embodiments each refer to a value for expanding the opening value, and the negative adjustments each refer to a value for reducing the opening value.
FIG. 3 is a schematic illustration of a method of engine load control according to an alternate embodiment of the present invention. As shown in fig. 3, the following process is specifically performed:
the dynamic difference can be understood as different target values and different primary deviation values calculated in the acquisition period of the actual value respectively.
When the deviation value is larger than a positive deviation (a first preset value), if the opening degree of a throttle valve is smaller than 95%, the output control quantity 1 (the throttle valve) is adjusted positively, the adjustment step length is automatically calculated by the system according to the relative difference between the target value and the actual value, if the opening degree of the throttle valve is larger than 95% and the opening degree of a supercharger is smaller than 1%, the output control quantity 2 (the supercharger) is kept unchanged, otherwise, the output control quantity 2 is adjusted negatively, and the adjustment step length is automatically calculated by the system according to the relative difference between the target value and the actual value.
When the deviation value is smaller than a negative deviation (a second preset value), if the opening degree of the supercharger is smaller than 95%, the output control quantity 2 is required to be adjusted positively, the adjustment step length is automatically calculated by the system according to the relative difference between the target value and the actual value, if the opening degree of the supercharger is larger than 95% and the opening degree of the throttle valve is larger than 2%, the output control quantity 1 is required to be adjusted negatively, the adjustment step length is automatically calculated by the system according to the relative difference between the target value and the actual value, otherwise, the output control quantity 1 is kept unchanged;
when the deviation value is between the positive deviation and the negative deviation, the output control amounts 1, 2 are kept unchanged.
FIG. 4 is a logic diagram of a method of engine load control according to an alternate embodiment of the present invention; as shown in fig. 4, the method of engine load control of the present application includes: and acquiring a target value and an actual value of the load parameter at a preset sampling frequency, performing low-pass filtering on the acquired target signal and the acquired actual signal, and performing logic operation, wherein the logic operation is to output different control signals according to the deviation value, the actual value and the preset value, and the control signals comprise a control and adjustment throttle opening value and a control and adjustment supercharger opening value.
The output control amount 1 is an output control signal of a throttle valve, and the output control amount 2 is an output control signal of a supercharger. The adjustment quantity of each cycle can realize intelligent variable control, the adjustment quantity is automatically calculated along with the difference value between the target value and the actual value, and the adjustment quantity is increased and decreased along with the increase of the deviation value, so that the control is more sensitive and accurate. When the difference between the target value and the actual value is larger, the actual value can be adjusted more quickly by increasing the adjustment amount, and the target value is reached in a relatively shorter time; when the difference between the target value and the actual value is smaller, the adjustment of the actual value can be slowed down by reducing the adjustment amount, and the target value can be more accurately reached without exceeding the limit. In this way, intelligent adjustment of the rate of engine load control can be achieved.
The formula for calculating the regulating variable is: the actual regulating quantity is (target value-actual value)/steady state deviation is the minimum regulating quantity, wherein the steady state deviation and the minimum regulating quantity can be freely set according to requirements, and various control requirements can be flexibly met.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, an engine load control system is also provided, and the device is used to implement the above embodiments and preferred embodiments, which have already been described and will not be described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 5 is a block diagram of an engine load control system according to an embodiment of the present invention, as shown in fig. 5, the apparatus including: an obtaining module 51, wherein the obtaining module 51 is configured to obtain the load parameter information at a preset frequency; the processing module 52, the processing module 52 is configured to generate control information based on the load parameter information; a control module 53, the control module 53 for adjusting one of an opening value of a throttle valve and an opening value of a supercharger to change an actual value of a load parameter based on the control information
By the device, load parameter information of the engine is obtained by detection, preset value information is obtained by calculating a deviation value between a target value and an actual value of the load parameter, the preset value information is used for representing an allowable value of the deviation value, and control information is generated based on the deviation value and the preset value information, wherein the control information is used for adjusting one of an opening value of a throttle valve and an opening value of a supercharger to change the actual value of the load parameter, so that the aim of automatically and quickly stabilizing the load parameter is fulfilled, an engineering tester is not required to adjust the engine for multiple times to keep the load parameter stable, the problem that the engine is out of control or even damaged due to unstable load parameters is avoided, and the fluctuation range of the load parameter is controllable, so that different test requirements are met. By adopting the technical scheme of the application, when the load parameter fluctuates, the load parameter can be quickly returned to the allowable range, and the technical problem of poor engine load control effect in the related art is solved.
The acquisition module 51 includes a data acquisition module having a sampling frequency selection function, and can be set autonomously according to a requirement, so as to achieve a better control effect. The processing module 52 includes a logical operation module. The engine load control system also comprises a data signal processing module, the data signal processing module carries out low-pass filtering processing on the acquired signals, interference of high-frequency signals is mainly removed, low-pass signals capable of reflecting real conditions are output, and the calculation formula is as follows: u (T) ═ U (T-1) + K [ I (T) — U (T-1) ], K ═ DT/T, K is generally between 0 and 1, dT is the running step length, T is the time constant; i is an input signal; u is the output signal. Different time constants T can produce different output effects, and a reasonable T value is set according to actual requirements, so that an ideal effect can be achieved.
In an optional embodiment, the target load and the actual load are subjected to data acquisition through a data acquisition module, the acquired signals are subjected to low-pass filtering through a data signal processing module, high-frequency signals are filtered out, low-pass signals capable of reflecting the actual situation are output so as to be used for calculation of the next module, the processed signals are sent to a logic operation module, the acquired signals are subjected to complex calculation through a preset program in the module, and a 1 st control signal 6 (throttle control signal) and a 2 nd control signal (supercharger control signal) are respectively output and respectively control the opening of a throttle valve and the opening of a supercharger. The system has variable sampling frequency, the sampling frequency can be adjusted according to requirements, and the output signal is controlled by the same frequency, so that the aim of continuously and synchronously controlling the load of the engine is fulfilled, and the load of the engine is always in a reasonable tolerance zone interval.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
step S1, detecting and obtaining load parameter information of the engine, wherein the load parameter information at least comprises: a target value for a load parameter characterizing the engine, and an actual value for a load parameter characterizing the engine;
step S2, calculating the deviation value between the target value and the actual value of the load parameter;
step S3, acquiring preset value information, wherein the preset value information is used for representing an allowable value of the deviation value;
and step S4, generating control information based on the deviation value and the preset value information, wherein the control information is used for adjusting one of the opening degree value of the throttle valve and the opening degree value of the supercharger to change the actual value of the load parameter.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory in which a computer program is stored and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
step S1, detecting and obtaining load parameter information of the engine, wherein the load parameter information at least comprises: a target value for a load parameter characterizing the engine, and an actual value for a load parameter characterizing the engine;
step S2, calculating a deviation value between the target value and the actual value of the load parameter;
step S3, acquiring preset value information, wherein the preset value information is used for representing an allowable value of the deviation value;
and step S4, generating control information based on the deviation value and the preset value information, wherein the control information is used for adjusting one of the opening degree value of the throttle valve and the opening degree value of the supercharger to change the actual value of the load parameter.
In an optional embodiment, the method for controlling the engine load is suitable for controlling the load of various supercharged engines, the load control variable can be replaced at will without adjusting system parameters, the method is suitable for an automatic engine load control test without completing calibration of a stand, free control of various working conditions can be met, and the precision and the speed can be automatically adjusted according to requirements. Further, the application also provides a method and a theory for judging the stable state of the engine load, and the fluctuation range of the stable engine load can be actively set so as to meet different test requirements. The adjustment step length of the variable can be automatically adjusted according to the difference between the target value and the actual value, so that the aim of quick and accurate control is fulfilled. Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be 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, units or modules, and may be in an electrical 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 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 invention 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 unit, 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, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method of engine load control, comprising the steps of:
detecting and obtaining load parameter information of the engine, wherein the load parameter information at least comprises: a target value for a load parameter characterizing the engine, and an actual value for characterizing the load parameter;
calculating a deviation value between the target value and the actual value of the load parameter;
acquiring preset value information, wherein the preset value information is used for representing an allowable value of the deviation value;
and generating control information based on the deviation value and the preset value information, wherein the control information is used for adjusting one of an opening degree value of a throttle valve and an opening degree value of a supercharger so as to change the actual value of the load parameter.
2. The method of claim 1, wherein generating control information based on the deviation value and the preset value information comprises:
acquiring a first preset value, wherein the first preset value is used for representing a maximum positive deviation value;
judging whether the deviation value is larger than the first preset value or not, and acquiring the opening degree value of the throttle valve under the condition that the deviation value is larger than the first preset value;
generating first control information based on the opening degree value of the throttle valve, wherein the first control information includes at least one of: positively adjusting the opening degree value of the throttle valve, negatively adjusting the opening degree value of the supercharger, and keeping the opening degree value of the supercharger unchanged.
3. The method of claim 2, further comprising:
acquiring a second preset value, wherein the second preset value is used for representing a minimum negative deviation value;
under the condition that the deviation value is determined to be smaller than or equal to the first preset value, judging whether the deviation value is smaller than the second preset value or not;
under the condition that the deviation value is determined to be smaller than the second preset value, acquiring an opening value of the supercharger;
generating second control information based on the opening value of the supercharger, wherein the second control information includes at least one of: negatively adjusting the opening degree value of the throttle valve, keeping the opening degree value of the throttle valve unchanged, and positively adjusting the opening degree value of the supercharger;
generating third control information based on the deviation value in the case that it is determined that the deviation value is greater than or equal to the second preset value, wherein the third control information includes at least one of: and keeping the opening degree value of the supercharger and the opening degree value of the throttle unchanged.
4. The method of claim 2, wherein generating first control information based on the opening value of the throttle valve comprises:
judging whether a first ratio is larger than a first preset ratio or not based on the opening degree value of the throttle valve, and acquiring the opening degree value of the supercharger under the condition that the first ratio is larger than the first preset ratio, wherein the first ratio is used for representing the ratio of the opening degree value of the throttle valve to the maximum opening degree value of the throttle valve;
generating fourth control information based on the opening value of the supercharger, the fourth control information including one of: negatively adjusting the opening degree value of the supercharger and keeping the opening degree value of the supercharger unchanged;
positively adjusting the opening degree value of the throttle valve in the case where it is determined that the first ratio is less than or equal to the first preset ratio.
5. The method of claim 4, wherein generating fourth control information based on the opening value of the supercharger comprises:
judging whether a second ratio is smaller than a second preset ratio or not based on the opening degree value of the supercharger, and keeping the opening degree value of the supercharger unchanged under the condition that the first ratio is smaller than the second preset ratio, wherein the second ratio is used for representing the ratio of the opening degree value of the supercharger to the maximum opening degree value of the supercharger;
and under the condition that the second ratio is determined to be larger than or equal to the second preset ratio, negatively adjusting the opening value of the supercharger.
6. The method of claim 3, wherein generating second control information based on the opening value of the supercharger comprises:
judging whether a second ratio is larger than a third preset ratio or not based on the opening degree value of the supercharger, and acquiring the opening degree value of the throttle valve under the condition that the second ratio is larger than the third preset ratio;
generating fifth control information based on the opening degree value of the throttle valve, the fifth control information including one of: negatively adjusting the opening degree value of the throttle valve and keeping the opening degree value of the throttle valve unchanged;
and under the condition that the second ratio is determined to be smaller than or equal to the third preset ratio, positively adjusting the opening value of the supercharger.
7. The method according to claim 6, wherein generating fifth control information based on the opening value of the throttle valve includes:
judging whether the first ratio is larger than a fourth preset ratio or not based on the opening degree value of the throttle valve, and regulating the opening degree value of the throttle valve in a negative direction under the condition that the first ratio is larger than the fourth preset ratio;
in a case where it is determined that the first ratio is less than or equal to the fourth preset ratio, the opening value of the throttle valve is kept unchanged.
8. An engine load control system, comprising:
the acquisition module is used for acquiring load parameter information at a preset frequency;
a processing module for generating control information based on the load parameter information;
a control module to adjust one of an opening value of a throttle valve, an opening value of a supercharger to change an actual value of a load parameter based on the control information.
9. A non-volatile storage medium, in which a computer program is stored, wherein the computer program is arranged to execute the method of engine load control as claimed in any one of claims 1 to 7 when executed.
10. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and the processor is arranged to run the computer program to perform the method of engine load control as claimed in any one of claims 1 to 7.
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