CN115306566B - A compressor surge correction method, device and equipment - Google Patents

Abstract

The application discloses a method, a device and equipment for correcting the surge of a gas compressor, which are used for realizing the detection and correction of the surge of the gas compressor, and the method comprises the following steps: acquiring air flow of an inlet of a compressor; determining whether the compressor has surge or not according to the air flow in a preset time period; if the compressor has surge, the closing speed of an air inlet throttle valve of the engine is reduced and/or the instantaneous fuel injection quantity of the engine is reduced so as to correct the surge of the compressor.

Description

A compressor surge correction method, device and equipment

Technical Field

The present application relates to the field of engine control, and in particular to a compressor surge correction method, device and equipment.

Background Art

The compressor is a component in a gas turbine engine that uses high-speed rotating blades to work on the air to increase the air pressure. Compressor surge is a low-frequency, high-amplitude oscillation phenomenon that occurs along the compressor axis.

Under certain special working conditions, the engine will cause compressor surge, which will cause noise, compressor damage and other malignant faults in the long run, causing the engine life to be significantly reduced. At present, how to quickly correct compressor surge is a technical problem that needs to be solved urgently.

Summary of the invention

In view of this, embodiments of the present application provide a compressor surge correction method, device and equipment to achieve compressor surge correction.

To solve the above problems, the technical solutions provided in the embodiments of the present application are as follows:

A compressor surge correction method, the method comprising:

Get the air flow rate at the compressor inlet;

Determining whether the compressor is in surge according to the air flow rate within a preset time period;

If the compressor is experiencing surge, the closing speed of the air intake throttle of the engine is reduced and/or the instantaneous fuel injection amount of the engine is reduced to correct the surge of the compressor.

In a possible implementation, if the compressor has surge, reducing the closing speed of the intake throttle of the engine and/or reducing the instantaneous fuel injection amount of the engine to correct the surge of the compressor includes:

If the compressor is surging, when the engine has an intake throttle, reducing the closing speed of the intake throttle of the engine until the closing speed of the intake throttle of the engine reaches a first threshold or the compressor is not surging;

When a target condition is met, the instantaneous fuel injection amount of the engine is reduced until there is no surge in the compressor, and the target condition is that the closing speed of the intake throttle of the engine reaches a first threshold and there is surge in the compressor, or, if surge occurs in the compressor, the engine does not have an intake throttle.

In a possible implementation, if the compressor has surge, when the engine has an intake throttle, reducing the closing speed of the intake throttle of the engine until the closing speed of the intake throttle of the engine reaches a first threshold or the compressor does not have surge, includes:

If the compressor has surge, when the engine has an intake throttle, multiply the current closing speed of the intake throttle of the engine by a correction coefficient to obtain a target closing speed of the intake throttle of the engine, and control the intake throttle of the engine to close at the target closing speed; the correction coefficient is greater than 0 and less than 1;

The air flow at the compressor inlet is reacquired, and whether the compressor is surging according to the air flow in a preset time period. If the compressor is surging, the current closing speed of the intake throttle of the engine is multiplied by a correction coefficient to obtain the target closing speed of the intake throttle of the engine and subsequent steps until the closing speed of the intake throttle of the engine reaches a first threshold or the compressor is not surging.

In a possible implementation, when the target condition is met, reducing the instantaneous fuel injection amount of the engine until there is no surge in the compressor includes:

When the target condition is met, the current instantaneous fuel injection amount of the engine is multiplied by a correction coefficient to obtain a target instantaneous fuel injection amount of the engine, and the engine is controlled to inject fuel at the target instantaneous fuel injection amount; the correction coefficient is greater than 0 and less than 1;

The air flow at the compressor inlet is reacquired, and whether the compressor is surging is determined based on the air flow in a preset time period. If the compressor is surging, the current instantaneous fuel injection amount of the engine is multiplied by a correction coefficient to obtain the target instantaneous fuel injection amount of the engine and subsequent steps until the compressor is no longer surging.

In a possible implementation, the correction coefficient decreases as the number of calculations increases.

In a possible implementation, obtaining the air flow rate at the compressor inlet includes:

When a condition in which the engine throttle is momentarily loosened is detected, an air flow sensor arranged at the compressor inlet is triggered to collect the air flow, and the air flow at the compressor inlet is obtained from the air flow sensor.

In a possible implementation, determining whether the compressor has surge according to the air flow rate within a preset time period includes:

The variance of the air flow rate within a preset time period is calculated, and when the variance is greater than a second threshold, it is determined that the compressor is in surge, and when the variance is less than or equal to the second threshold, it is determined that the compressor is not in surge.

A compressor surge correction device, the device comprising:

An acquisition unit, used for acquiring the air flow rate at the compressor inlet;

a determination unit, configured to determine whether the compressor is experiencing surge according to the air flow rate within a preset time period;

The correction unit is used to reduce the closing speed of the intake throttle of the engine and/or reduce the instantaneous fuel injection amount of the engine if the compressor has surge, so as to correct the surge of the compressor.

A compressor surge correction device, the device comprising:

one or more processors;

a storage device having one or more programs stored thereon,

When the one or more programs are executed by the one or more processors, the one or more processors implement the compressor surge correction method as described above.

A computer readable medium stores a computer program thereon, wherein when the program is executed by a processor, the compressor surge correction method as described above is implemented.

It can be seen that the embodiments of the present application have the following beneficial effects:

The embodiment of the present application can first determine whether the compressor is surging according to the air flow rate at the compressor inlet, thereby realizing the detection of compressor surging. When the compressor is surging, the compressor surging is eliminated by reducing the closing speed of the engine's intake throttle and/or reducing the instantaneous fuel injection amount of the engine, thereby realizing the rapid correction of the compressor surging. Thus, by detecting and correcting the compressor surging in real time, the reliability of the compressor operation is guaranteed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a compressor surge operating area according to an embodiment of the present application;

FIG2 is a flow chart of a compressor surge correction method provided by an embodiment of the present application;

FIG3 is a schematic diagram of the position of an air flow sensor in an embodiment of the present application;

FIG4 is a logic diagram of a compressor surge correction method provided in an embodiment of the present application;

FIG5 is a schematic diagram of a compressor surge correction device provided in an embodiment of the present application.

DETAILED DESCRIPTION

In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

In order to facilitate understanding and explanation of the technical solution provided by the embodiments of the present application, the background technology of the embodiments of the present application will be described below.

The compressor is a component in a gas turbine engine that uses high-speed rotating blades to work on the air to increase the air pressure. The air passes through the compressor and enters the cylinder of the engine. As shown in Figure 1, the compressor has a stable and safe operating condition area (the middle area away from the surge area and the overspeed area in the figure). Among them, the horizontal axis in the figure is the air flow through the compressor, and the vertical axis is the ratio of the pressure at the compressor outlet to the pressure at the compressor inlet, that is, the compression ratio (or pressure ratio). As shown in the figure, the compressor will enter an unstable operating area in the area with small air flow due to the stall of the air flow on the blade surface. This area is the surge area, such as the area on the left side of the surge line. If the compressor operates in this operating area, that is, the compressor surges, the compressor cannot operate stably, which will cause vibration damage and noise of the impeller, so the compressor should not enter this operating area under any circumstances.

The inventor has found through research that the compressor may surge under certain special operating conditions, such as when the driver releases the accelerator in a very short time, or the engine intake throttle is quickly closed while the accelerator is released, or the volume of the intercooler increases. However, the prior art lacks a technical solution for detecting and correcting compressor surge.

Based on this, the embodiment of the present application provides a compressor surge correction method, device and equipment, which obtains the air flow rate at the compressor inlet; determines whether the compressor is surging according to the air flow rate in a preset time period; if the compressor is surging, reduces the closing speed of the engine's intake throttle and/or reduces the engine's instantaneous fuel injection amount to correct the compressor surge. Thus, compressor surge detection and correction are achieved.

To facilitate understanding of the embodiments of the present application, a compressor surge correction method provided by the embodiments of the present application is described below with reference to the accompanying drawings.

Refer to FIG2 , which is a flow chart of a compressor surge correction method provided by an embodiment of the present application. As shown in FIG2 , the method may include S201-S203:

S201: Obtain the air flow rate at the compressor inlet.

The embodiments of the present application can be applied to an engine controller or other vehicle controllers. In a vehicle, an air flow sensor is generally provided at the inlet of the compressor to measure the air flow at the inlet of the compressor. After the air flow sensor measures the air flow, the air flow at the inlet of the compressor can be obtained from the air flow sensor.

In a possible implementation, since the engine is prone to compressor surge when the throttle is suddenly released, the compressor surge correction method of the embodiment of the present application can be triggered when the engine throttle is detected to be loosened instantaneously. The air flow at the compressor inlet is obtained, which may include: when the engine throttle is detected to be loosened instantaneously, triggering an air flow sensor set at the compressor inlet to collect the air flow, and obtaining the air flow at the compressor inlet from the air flow sensor.

The operating condition of the engine throttle being loosened momentarily can be determined by the engine controller or other vehicle controllers. When this operating condition is detected, the air flow sensor is triggered to start collecting air flow.

In addition, compressor surge is also likely to occur under conditions where the pressure ratio is low and the air flow rate at the compressor inlet is low. Therefore, when the pressure ratio is low or the air flow rate at the compressor inlet is low, the air flow rate sensor set at the compressor inlet can be triggered to collect the air flow rate, and the air flow rate at the compressor inlet can be obtained from the air flow rate sensor. The pressure ratio is low or the air flow rate at the compressor inlet can be determined by the engine controller or other vehicle controllers. For example, the pressure ratio is low when the pressure ratio is less than the pressure ratio threshold, and the air flow rate at the compressor inlet is low when the air flow rate at the compressor inlet is less than the air flow rate threshold.

After obtaining the air flow at the compressor inlet, it can be further determined whether the compressor has surge.

S202: Determine whether the compressor is experiencing surge based on the air flow rate within a preset time period.

If the compressor is surging, the air flow at different positions of the engine intake system will fluctuate over time. For example, if the compressor is surging, as shown in Figure 3, the air flow at the air filter position ①, the air flow sensor (i.e., AFS sensor) position ②, the compressor outlet position ③, and the intercooler position ⑦ in the engine intake system will fluctuate violently. Therefore, it is possible to determine whether the compressor is surging by analyzing the air flow within a preset time period.

In a possible implementation, the variance of the air flow rate within a preset time period may be calculated. When the variance is greater than a second threshold, it is determined that the compressor is in surge. When the variance is less than or equal to the second threshold, it is determined that the compressor is not in surge.

In practical applications, for example, the air flow sensor has a collection frequency of 10 milliseconds, and the variance calculation can be performed on the real-time air flow data collected within a preset time period of 2 seconds. When the variance value is greater than the second threshold value of 0.05, it can be considered that the compressor has experienced surge. The preset time period can be set according to actual conditions, and the second threshold value can be determined by calibration. The embodiment of the present application does not limit the value of the preset time period and the second threshold value.

If the compressor does not have surge, then surge correction is not required. In a possible implementation, the air flow at the compressor inlet may be obtained, and whether the compressor has surge is determined based on the air flow in a preset time period. If the compressor has surge, then the surge of the compressor needs to be corrected.

S203: If the compressor is experiencing surge, reduce the closing speed of the engine's intake throttle and/or reduce the instantaneous fuel injection amount of the engine to correct the compressor's surge.

If the compressor is surging, the embodiment of the present application can correct the surging of the compressor by reducing the closing speed of the engine's intake throttle and/or reducing the instantaneous fuel injection amount of the engine. Among them, reducing the closing speed of the engine's intake throttle can increase the air flow of the compressor. Referring to FIG1, when the pressure ratio remains unchanged, increasing the air flow may return the operating condition from the surge area to the non-surge area. Reducing the instantaneous fuel injection amount of the engine will reduce the pressure ratio. When the air flow rate remains unchanged, reducing the pressure ratio may also return the operating condition from the surge area to the non-surge area.

After determining that there is surging, the engine intake valve opening and the engine fuel injection amount are corrected to solve the engine surging in real time.

In this way, the embodiment of the present application can first determine whether the compressor is surging according to the air flow rate at the compressor inlet, thereby realizing the detection of compressor surging. When the compressor is surging, the compressor surging is eliminated by reducing the closing speed of the engine's intake throttle and/or reducing the instantaneous fuel injection amount of the engine, thereby realizing the rapid correction of the compressor surging. Thus, by detecting and correcting the compressor surging in real time, the reliability of the compressor operation is guaranteed.

Due to different engine models, the engines may be divided into those with or without intake throttles, and the processes for correcting compressor surge in different situations are different. Therefore, if the compressor is surging, the specific implementation of reducing the closing speed of the engine's intake throttle and/or reducing the instantaneous fuel injection amount of the engine to correct the compressor surge may include:

A1: If there is compressor surge, when the engine has an intake throttle, reduce the closing speed of the intake throttle of the engine until the closing speed of the intake throttle of the engine reaches a first threshold or there is no compressor surge.

A2: When the target condition is met, the instantaneous fuel injection amount of the engine is reduced until there is no surge in the compressor. The target condition is that the closing speed of the engine's intake throttle reaches a first threshold and there is surge in the compressor, or, if there is surge in the compressor, the engine does not have an intake throttle.

That is, after judging that the compressor has surge, the first case is that the engine has an intake throttle, then the closing speed of the intake throttle of the engine is reduced until the compressor does not have surge, or the closing speed of the intake throttle of the engine reaches the first threshold; when the closing speed of the intake throttle of the engine reaches the first threshold and the compressor still has surge, the instantaneous fuel injection amount of the engine is reduced until the compressor does not have surge. Among them, the first threshold can be determined by calibration, and the embodiment of the present application does not limit the value of the first threshold.

After determining that the compressor is surging, the second situation is that when the engine does not have an intake throttle, the instantaneous fuel injection amount of the engine is directly reduced until the compressor is no longer surging.

In a possible implementation, the above A1: if the compressor has surge, when the engine has an intake throttle, reducing the closing speed of the intake throttle of the engine until the closing speed of the intake throttle of the engine reaches a first threshold or the compressor does not have surge, may include:

B1: If there is surge in the compressor, when the engine has an intake throttle, multiply the current closing speed of the engine's intake throttle by the correction coefficient to obtain the target closing speed of the engine's intake throttle, and control the engine's intake throttle to close at the target closing speed; the correction coefficient is greater than 0 and less than 1.

In an embodiment of the present application, the new closing speed of the engine's intake throttle can be obtained by multiplying the current closing speed of the engine's intake throttle by a correction coefficient greater than 0 and less than 1, and the engine's intake throttle can be controlled to close at the new closing speed, thereby reducing the closing speed of the engine's intake throttle.

B2: Reacquire the air flow at the compressor inlet, and determine whether the compressor is surging based on the air flow within a preset time period. If the compressor is surging, multiply the current closing speed of the engine's intake throttle by the correction coefficient to obtain the target closing speed of the engine's intake throttle and subsequent steps until the closing speed of the engine's intake throttle reaches a first threshold or the compressor is not surging.

After completing an operation of reducing the closing speed of the intake throttle of the engine, the air flow rate at the compressor inlet can be obtained from the air flow sensor again, and whether the compressor is surging can be determined based on the air flow rate in a preset time period. The specific method for determining whether the compressor is surging can be referred to the above embodiment, and will not be repeated here.

If the compressor still surges, multiply the current closing speed of the engine's intake throttle by a correction coefficient greater than 0 and less than 1 to obtain the new closing speed of the engine's intake throttle, control the engine's intake throttle to close at the new closing speed, and continue to reduce the closing speed of the engine's intake throttle.

The above process is repeated until the closing speed of the intake throttle of the engine reaches a first threshold or there is no surge in the compressor.

In order to speed up the adjustment speed, each time the current closing speed of the intake throttle valve of the engine is multiplied by the correction factor, the correction factor may be reduced as the number of calculations increases.

Therefore, the above process can correct the compressor surge by reducing the closing speed of the engine's intake throttle.

In a possible implementation, the above A2: when the target condition is met, reducing the instantaneous fuel injection amount of the engine until there is no surge in the compressor may include:

C1: When the target condition is met, the current instantaneous fuel injection amount of the engine is multiplied by the correction coefficient to obtain the target instantaneous fuel injection amount of the engine, and the engine is controlled to inject fuel at the target instantaneous fuel injection amount; the correction coefficient is greater than 0 and less than 1.

In an embodiment of the present application, when the target conditions are met, the new instantaneous fuel injection amount of the engine can be obtained by multiplying the current instantaneous fuel injection amount of the engine by a correction coefficient greater than 0 and less than 1, and the engine can be controlled to inject fuel with the new instantaneous fuel injection amount, thereby reducing the instantaneous fuel injection amount of the engine.

C2: Re-acquire the air flow at the compressor inlet, and determine whether the compressor is surging based on the air flow in a preset time period. If the compressor is surging, multiply the current instantaneous fuel injection amount of the engine by the correction coefficient to obtain the target instantaneous fuel injection amount of the engine and subsequent steps until the compressor is no longer surging.

After completing an operation of reducing the instantaneous fuel injection amount of the engine, the air flow rate at the compressor inlet can be obtained from the air flow sensor again, and whether the compressor is surging can be determined based on the air flow rate in a preset time period. The specific method for determining whether the compressor is surging can be referred to the above embodiment, and will not be repeated here.

If the compressor still has surge, multiply the current instantaneous fuel injection amount of the engine by a correction coefficient greater than 0 and less than 1 to obtain the new instantaneous fuel injection amount of the engine, control the engine to inject fuel with the new instantaneous fuel injection amount, and continue to reduce the instantaneous fuel injection amount of the engine.

The above process is repeated until there is no surge in the compressor.

In order to speed up the adjustment, each time the current instantaneous fuel injection amount of the engine is multiplied by the correction factor, the correction factor can be reduced as the number of calculations increases.

Therefore, the above process can correct the compressor surge by reducing the instantaneous fuel injection amount of the engine.

In order to further understand the control logic of the compressor surge correction, refer to FIG. 4 , which shows a logic diagram of the compressor surge correction method in an embodiment of the present application.

When the engine throttle is detected to be loose instantaneously, for example, the throttle closing speed is greater than the third threshold value, which may be a calibration value, such as 10%/s, the air flow sensor is activated to collect the air flow. The variance of the air flow in a preset time period is calculated, and when the variance exceeds the second threshold value, such as 0.02, it is determined that the compressor is surging at this time, and the surging correction function needs to be activated.

If the engine itself has an intake throttle, the first correction variable is the closing speed V_throttle of the intake throttle of the engine, and a correction coefficient Th_cor greater than 0 and less than 1 is multiplied with V_throttle to obtain the target closing speed New_V_throttle of the intake throttle of the engine, that is, the corrected throttle closing speed becomes smaller. Continue to judge the surge. If there is no surge in the compressor, the logic ends. If there is still surge in the compressor, further reduce the correction coefficient Th_cor, multiply the closing speed V_throttle of the intake throttle by the correction coefficient Th_cor again, and execute the subsequent steps. When the corrected V_throttle is less than or equal to the first threshold V_c, the correction of reducing the intake throttle of the engine ends, indicating that the surge problem cannot be solved by correcting the closing speed of the intake throttle alone, and further correction is required to enter the next correction logic, that is, it is necessary to correct the surge by reducing the instantaneous injection amount of the engine.

If the engine itself does not have an intake throttle, or the closing speed of the intake throttle of the engine reaches the first threshold value V_c and the compressor is surging, the injection amount correction is activated. The instantaneous injection amount Inj_Mass of the engine is multiplied by a correction coefficient Inj_Mass_cor greater than 0 and less than 1 to obtain the target instantaneous injection amount Inj_Mass_new. Continue to make a surge judgment. If the compressor is not surging, the logic ends. If the compressor is still surging, further reduce the correction coefficient Inj_Mass_cor, re-multiply the instantaneous injection amount Inj_Mass and the correction coefficient Inj_Mass_cor, and execute the subsequent steps until the compressor no longer surges and the logic ends.

The embodiment of the present application determines compressor surge based on the variance of air flow rate, and corrects the engine's intake throttle opening and fuel injection amount after determining that surge exists, thereby resolving compressor surge in real time.

Based on a compressor surge correction method provided by the above method embodiment, the embodiment of the present application also provides a compressor surge correction device, and the compressor surge correction device will be described below in conjunction with the accompanying drawings.

Refer to FIG5 , which is a schematic diagram of the structure of a compressor surge correction device provided in an embodiment of the present application. As shown in FIG5 , the compressor surge correction device includes:

An acquisition unit 501 is used to acquire the air flow rate at the compressor inlet;

A determination unit 502, configured to determine whether the compressor has surge according to the air flow rate within a preset time period;

The correction unit 503 is used to reduce the closing speed of the intake throttle of the engine and/or reduce the instantaneous fuel injection amount of the engine if the compressor has surge, so as to correct the surge of the compressor.

In a possible implementation, the correction unit includes:

a first correction subunit, configured to, if the compressor has surge, reduce a closing speed of the intake throttle of the engine when the engine has an intake throttle, until the closing speed of the intake throttle of the engine reaches a first threshold or the compressor does not have surge;

The second correction subunit is used to reduce the instantaneous fuel injection amount of the engine until the compressor does not have surge when a target condition is met, and the target condition is that the closing speed of the intake throttle of the engine reaches a first threshold and the compressor has surge, or if the compressor surges, the engine does not have an intake throttle.

In a possible implementation manner, the first correction subunit is specifically configured to:

If the compressor has surge, when the engine has an intake throttle, multiply the current closing speed of the intake throttle of the engine by a correction coefficient to obtain a target closing speed of the intake throttle of the engine, and control the intake throttle of the engine to close at the target closing speed; the correction coefficient is greater than 0 and less than 1;

Re-trigger the acquisition unit to acquire the air flow at the compressor inlet, trigger the determination unit to determine whether the compressor is surging according to the air flow in a preset time period, if the determination unit determines that the compressor is surging, execute multiplication of the current closing speed of the engine's intake throttle by a correction coefficient to obtain the target closing speed of the engine's intake throttle and subsequent steps until the closing speed of the engine's intake throttle reaches a first threshold or the compressor is not surging.

In a possible implementation manner, the second correcting subunit is specifically configured to:

When the target condition is met, the current instantaneous fuel injection amount of the engine is multiplied by a correction coefficient to obtain a target instantaneous fuel injection amount of the engine, and the engine is controlled to inject fuel at the target instantaneous fuel injection amount; the correction coefficient is greater than 0 and less than 1;

Re-trigger the acquisition unit to acquire the air flow at the compressor inlet, trigger the determination unit to determine whether the compressor is surging according to the air flow in a preset time period, if the determination unit determines that the compressor is surging, execute multiplication of the current instantaneous fuel injection amount of the engine by the correction coefficient to obtain the target instantaneous fuel injection amount of the engine and subsequent steps until the compressor is no longer surging.

In a possible implementation, the correction coefficient decreases as the number of calculations increases.

In a possible implementation manner, the acquiring unit is specifically configured to:

When a condition in which the engine throttle is momentarily loosened is detected, an air flow sensor arranged at the compressor inlet is triggered to collect the air flow, and the air flow at the compressor inlet is obtained from the air flow sensor.

In a possible implementation manner, the determining unit is specifically configured to:

The variance of the air flow rate within a preset time period is calculated, and when the variance is greater than a second threshold, it is determined that the compressor is in surge, and when the variance is less than or equal to the second threshold, it is determined that the compressor is not in surge.

Based on a compressor surge correction method provided by the above method embodiment, the present application embodiment further provides a compressor surge correction device, the device comprising:

one or more processors;

a storage device having one or more programs stored thereon,

When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned compressor surge correction method.

In addition, an embodiment of the present application further provides a computer-readable medium having a computer program stored thereon, wherein the program implements the above-mentioned compressor surge correction method when executed by a processor.

The embodiment of the present application can first determine whether the compressor is surging according to the air flow rate at the compressor inlet, thereby realizing the detection of compressor surging. When the compressor is surging, the compressor surging is eliminated by reducing the closing speed of the engine's intake throttle and/or reducing the instantaneous fuel injection amount of the engine, thereby realizing the rapid correction of the compressor surging. Thus, by detecting and correcting the compressor surging in real time, the reliability of the compressor operation is guaranteed.

It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And/or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character "/" generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A method for correcting surge of a compressor, the method comprising:

acquiring air flow of an inlet of a compressor;

Determining whether the compressor has surge or not according to the air flow in a preset time period;

if the compressor has surge, reducing the closing speed of an air inlet throttle valve of the engine and/or reducing the instantaneous oil injection quantity of the engine so as to correct the surge of the compressor;

Said reducing the closing speed of the intake throttle of the engine and/or reducing the instantaneous fuel injection quantity of the engine to correct the jerk of said compressor if said compressor is jerk, comprising:

If the compressor has surge, when the engine has an air inlet throttle valve, reducing the closing speed of the air inlet throttle valve of the engine until the closing speed of the air inlet throttle valve of the engine reaches a first threshold value or the compressor does not have surge;

And when a target condition is met, reducing the instantaneous oil injection quantity of the engine until the compressor has no surge, wherein the target condition is that the compressor has the surge after the closing speed of an air inlet throttle valve of the engine reaches a first threshold value.

2. The method of claim 1, wherein if the compressor is free of jerk, when an engine has an intake throttle, reducing a closing speed of the engine's intake throttle until the closing speed of the engine's intake throttle reaches a first threshold or the compressor is free of jerk comprises:

If the compressor has surge, when the engine is provided with an air inlet throttle valve, multiplying the current closing speed of the air inlet throttle valve of the engine by a correction coefficient to obtain the target closing speed of the air inlet throttle valve of the engine, and controlling the air inlet throttle valve of the engine to close at the target closing speed; the correction coefficient is greater than 0 and less than 1;

And re-acquiring the air flow of an inlet of the air compressor, determining whether the air compressor has surge according to the air flow in a preset time period, and if the air compressor has surge, multiplying the current closing speed of an air inlet throttle valve of the engine by a correction coefficient to obtain the target closing speed of the air inlet throttle valve of the engine and the follow-up steps until the closing speed of the air inlet throttle valve of the engine reaches a first threshold value or the air compressor has no surge.

3. The method of claim 1, wherein said reducing the instantaneous fuel injection of said engine when a target condition is met until said compressor is free of jerks comprises:

When a target condition is met, multiplying the current instantaneous oil injection quantity of the engine by a correction coefficient to obtain a target instantaneous oil injection quantity of the engine, and controlling the engine to perform oil injection according to the target instantaneous oil injection quantity; the correction coefficient is greater than 0 and less than 1;

And re-acquiring the air flow of an inlet of the air compressor, determining whether the air compressor has surge according to the air flow in a preset time period, and if the air compressor has surge, multiplying the current instantaneous fuel injection quantity of the engine by a correction coefficient to obtain the target instantaneous fuel injection quantity of the engine and the follow-up steps until the air compressor does not have surge.

4. A method according to claim 2 or 3, wherein the correction factor decreases with increasing number of calculations.

5. The method of claim 1, wherein said obtaining an air flow rate at a compressor inlet comprises:

When the working condition that the accelerator of the engine is instantaneously loosened is detected, the air flow sensor arranged at the inlet of the air compressor is triggered to acquire air flow, and the air flow of the inlet of the air compressor is acquired from the air flow sensor.

6. A method according to any one of claims 1-3, wherein said determining whether there is a surge in the compressor based on the air flow rate over a predetermined period of time comprises:

And calculating the variance of the air flow in a preset time period, when the variance is larger than a second threshold value, determining that the compressor has surge, and when the variance is smaller than or equal to the second threshold value, determining that the compressor does not have surge.

7. A surge correcting apparatus for a compressor, said apparatus comprising:

An acquisition unit for acquiring the air flow rate of the inlet of the compressor;

The determining unit is used for determining whether the compressor has surge or not according to the air flow in a preset time period;

A correction unit for reducing the closing speed of an intake throttle valve of an engine and/or reducing the instantaneous fuel injection quantity of the engine if the compressor has a surge, so as to correct the surge of the compressor;

The correction unit includes:

A first correction subunit, configured to, if there is a surge in the compressor, reduce, when an engine has an intake throttle, a closing speed of the intake throttle of the engine until the closing speed of the intake throttle of the engine reaches a first threshold or the compressor is free from a surge;

And the second correction subunit is used for reducing the instantaneous oil injection quantity of the engine when a target condition is met until the compressor has no surge, wherein the target condition is that the compressor has the surge after the closing speed of an air inlet throttle valve of the engine reaches a first threshold value.

8. A compressor surge correction apparatus, said apparatus comprising:

One or more processors;

a storage device having one or more programs stored thereon,

When executed by the one or more processors, causes the one or more processors to implement the compressor surge correction method of any one of claims 1-6.

9. A computer readable medium, characterized in that a computer program is stored thereon, wherein the program, when executed by a processor, implements the compressor surge correction method according to any one of claims 1-6.