Surge control system and control method thereof

Abstract

The invention discloses a surge control system and a control method thereof. The surge control system comprises a surge valve, a three-way valve and a control unit, the first end of the surge valve is communicated with a first pipeline between the throttle valve and the intercooler; the second end of the surge valve is communicated with a second pipeline between the throttle valve and the intake manifold; the third end of the surge valve is communicated with a third pipeline between the air inlet channel and the supercharger; the three-way valve is arranged between the second end of the surge valve and the second pipeline; the inlet end of the three-way valve is communicated with the second end of the surge valve; a first outlet end of the three-way valve is communicated with the second pipeline; a second outlet end of the three-way valve is communicated with the third pipeline; the control unit is in communication connection with the three-way valve. According to the technical scheme, the noise problem caused by critical opening of the surge valve is solved, the surge risk of a whole machine pipeline is reduced, and meanwhile the driving and riding comfort is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and particularly to a surge control system and a control method thereof. Background Art

[0002] To eliminate the surge phenomenon of the supercharger caused by the closing of the throttle valve in a whole vehicle, a surge valve is usually installed in front of the throttle valve, thereby improving the reliability of the supercharger and the throttle valve and extending the service life of the supercharger. Since the opening of the mechanical surge valve is controlled by the pressure difference before and after the throttle valve, there will be a critical opening state. When the vehicle is driving at a small throttle, this critical opening situation is very likely to occur, resulting in irregular vibration of the valve body and abnormal noise in the intake pipeline. The resulting noise, vibration, and harshness (NVH) problems seriously affect the ride comfort. Summary of the Invention

[0003] The present invention provides a surge control system and a control method thereof to solve the problem of abnormal noise of the surge valve in the critical opening state in the prior art.

[0004] According to one aspect of the present invention, a surge control system is provided, including a surge valve, a three-way valve, and a control unit;

[0005] The first end of the surge valve is communicated with a first pipeline between the throttle valve and the intercooler; the second end of the surge valve is communicated with a second pipeline between the throttle valve and the intake manifold; the third end of the surge valve is communicated with a third pipeline between the intake passage and the supercharger;

[0006] The three-way valve is arranged between the second end of the surge valve and the second pipeline; the inlet end of the three-way valve is communicated with the second end of the surge valve; the first outlet end of the three-way valve is communicated with the second pipeline; the second outlet end of the three-way valve is communicated with the third pipeline;

[0007] The control unit is communicatively connected with the three-way valve, and is configured to obtain the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opened pressure difference threshold; and control the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opened pressure difference threshold.

[0008] Optionally, it further includes a first pressure sensor and a second pressure sensor;

[0009] The first pressure sensor is arranged on the first pipeline; the second pressure sensor is arranged on the second pipeline;

[0010] The control unit is communicatively connected to the first air pressure sensor and the second air pressure sensor respectively, and is configured to obtain the pressure parameter before the throttle valve of the first air pressure sensor and the pressure parameter after the throttle valve of the second air pressure sensor, and determine the throttle pressure difference parameter according to the pressure parameter before the throttle valve and the pressure parameter after the throttle valve.

[0011] Optionally, it further includes a filtering unit;

[0012] The filtering unit is arranged on the third pipeline.

[0013] According to another aspect of the present invention, a surge control method is provided, which is applied to a surge control system; the surge control method includes:

[0014] Obtain the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold;

[0015] Control the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold.

[0016] Optionally, controlling the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold includes:

[0017] When the throttle pressure difference parameter P, the surge valve opening pressure difference threshold a, and the surge valve fully opening pressure difference threshold b satisfy a < P < b, control the inlet end to conduct with the second outlet end.

[0018] Optionally, after controlling the inlet end to conduct with the second outlet end, it further includes:

[0019] Continue to obtain the throttle pressure difference parameter.

[0020] Optionally, controlling the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold includes:

[0021] When the throttle pressure difference parameter P, the surge valve opening pressure difference threshold a, and the surge valve fully opening pressure difference threshold b satisfy a > P, control the inlet end to conduct with the first outlet end.

[0022] Optionally, controlling the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold includes:

[0023] When the throttle differential pressure parameter P, the surge valve opening differential pressure threshold value a, and the surge valve fully opened differential pressure threshold value b satisfy P > b, control the inlet end to conduct with the first outlet end.

[0024] Optionally, obtaining the throttle differential pressure parameter includes:

[0025] Obtain the pressure parameter before the throttle and the pressure parameter after the throttle;

[0026] Determine the throttle differential pressure parameter according to the pressure parameter before the throttle and the pressure parameter after the throttle.

[0027] Optionally, the surge valve opening differential pressure threshold value a and the surge valve fully opened differential pressure threshold value b satisfy 0 < b - a < 5 kPa.

[0028] Based on the technical solution of the present invention, on the basis of setting a surge valve to suppress surge, a three-way valve is set. By obtaining the throttle differential pressure parameter in real time and combining the surge valve opening differential pressure threshold value and the surge valve fully opened differential pressure threshold value to judge the conduction of the three-way valve, when the surge valve is in a critical opening state, the three-way valve is used to fully open the surge valve, solve the noise problem caused by the critical opening of the surge valve, reduce the surge risk of the whole machine pipeline, and improve the ride comfort at the same time.

[0029] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 is a schematic diagram of the pipeline connection of a surge control system according to an embodiment of the present invention;

[0032] Figure 2 is a flowchart of a first surge control method according to an embodiment of the present invention;

[0033] Figure 3 is a flowchart of a second surge control method according to an embodiment of the present invention;

[0034] Figure 4 is a flowchart of a third surge control method according to an embodiment of the present invention;

[0035] Figure 5It is a flowchart of the fourth surge control method provided according to an embodiment of the present invention;

[0036] Figure 6 It is a flowchart of the fifth surge control method provided according to an embodiment of the present invention;

[0037] Figure 7 It is a flowchart of the sixth surge control method provided according to an embodiment of the present invention. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0040] In the pipeline system in the prior art, the air inlet passage communicates with the supercharger inlet through the third pipeline, the supercharger outlet communicates with the intercooler, the intercooler and the throttle valve are connected through the first pipeline, and the throttle valve and the intake manifold are connected through the second pipeline. When the intake air flow rate of the compressor is too small, in the vane diffuser and at the impeller inlet, the air flow avoids separation to cause surging. When the flow rate is less than a certain value, the separation phenomenon of the air flow will spread to the entire vane diffuser and the impeller passage, causing strong oscillation and reverse flow of the air flow. This kind of phenomenon is surging. In order to prevent surging, a surge valve is arranged in the pipeline system. The surge valve can be a mechanical valve, which is mainly used to adjust the flow rate in the pipeline system. When the flow rate in the pipeline cannot meet the operation requirements of the equipment, the surge valve can automatically open and close according to the pressure difference before and after the throttle valve. However, when the vehicle is running at a low throttle, this critical opening situation is very likely to occur, resulting in irregular vibration of the valve body and abnormal noise in the intake pipeline, and the NVH problem brought seriously affects the riding comfort. Therefore, the embodiment of the present invention provides a surge control system, Figure 1 which is a schematic pipeline connection diagram of a surge control system provided according to an embodiment of the present invention. As Figure 1 shown, the surge control system includes: a surge valve 1, a three-way valve 2 and a control unit;

[0041] The first end 11 of the surge valve 1 is connected to the first pipeline 3 between the throttle valve 61 and the intercooler 62; the second end 12 of the surge valve 1 is connected to the second pipeline 4 between the throttle valve 61 and the intake manifold 63; the third end 13 of the surge valve 1 is connected to the third pipeline 5 between the air inlet passage 64 and the supercharger 65;

[0042] The three-way valve 2 is arranged between the second end 12 of the surge valve 1 and the second pipeline 4; the inlet end 21 of the three-way valve 2 is connected to the second end 12 of the surge valve 1; the first outlet end 22 of the three-way valve 2 is connected to the second pipeline 4; the second outlet end 23 of the three-way valve 2 is connected to the third pipeline 5;

[0043] The control unit is communicatively connected to the three-way valve 2, and is used to obtain the throttle pressure difference parameter, the surge valve opening pressure difference threshold and the surge valve fully opening pressure difference threshold; and control the inlet end 21 of the three-way valve 2 to conduct with the first outlet end 22 or the inlet end 21 to conduct with the second outlet end 23 according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold and the surge valve fully opening pressure difference threshold.

[0044] Among them, the surge valve 1 includes a first end 11, a second end 12, and a third end 13. The first end 11 is communicated with the first pipeline 3, the second end 12 is communicated with the second pipeline 4, and the third end 13 is communicated with the third pipeline 5. During normal operation, the first end 11 and the first pipeline 3 are in a conducting state, and the second end 12 and the second pipeline 4 are in a conducting state. When the throttle pressure difference parameter before and after the throttle valve 61 becomes larger to a certain extent, the surge valve 1 automatically controls the third end 13 to be communicated with the third pipeline 5, thereby achieving the effect of suppressing surge.

[0045] Among them, the three-way valve 2 can be a two-position three-way solenoid valve, which is communicatively connected to the control unit, and controls the on-off state of the valve by controlling the energization and de-energization of the electromagnetic coil. The three-way valve 2 includes an inlet end 21 and two outlet ends. The inlet end 21 is communicated with the second end 12 of the surge valve 1, and the first outlet end 22 is communicated with the second pipeline 4; the second outlet end 23 of the three-way valve 2 is communicated with the third pipeline 5. The control unit controls the inlet end 21 of the three-way valve 2 to be conducted with the first outlet end 22 or the inlet end 21 to be conducted with the second outlet end 23 by obtaining the throttle pressure difference parameter in real time and according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold, so as to achieve the purpose of suppressing noise when the surge valve 1 is critically opened.

[0046] Among them, the throttle pressure difference parameter can be the pressure difference before and after the throttle valve 61. The surge valve opening pressure difference threshold can be the critical pressure difference before and after the throttle valve 61 when the surge valve 1 is opened. When the surge valve 1 is in a slightly open state, there is likely to be noise and abnormal sound. The surge valve fully opening pressure difference threshold can be the critical pressure difference before and after the throttle valve 61 when the surge valve 1 is slightly opened. Exemplarily, the surge valve opening pressure difference threshold is a kPa. When the pressure difference before and after the throttle valve 61 is 0 - 5 kPa greater than the opening pressure of the surge valve 1, the surge valve 1 is in a slightly open state.

[0047] Specifically, when the vehicle is driving at a small throttle, there is a certain pressure difference before and after the throttle valve 61. At this time, the surge valve 1 is in a slightly open or critically open state. At this time, the control unit can control the inlet end 21 of the three-way valve 2 to be conducted with the second outlet end 23, so that the fluid enters the third pipeline 5. At this time, the surge valve 1 is fully opened, thereby avoiding the noise problem caused by the critical opening of the surge valve 1 and achieving the purpose of improving the ride comfort.

[0048] The technical solution of the embodiment of the present invention, on the basis of setting a surge valve to suppress surge, sets a three-way valve, judges the conduction of the three-way valve by obtaining the throttle pressure difference parameter in real time and combining the surge valve opening pressure difference threshold and the surge valve fully opening pressure difference threshold. When the surge valve is in a critical opening state, the three-way valve is used to fully open the surge valve, solve the noise problem caused by the critical opening of the surge valve, reduce the surge risk of the whole machine pipeline, and improve the ride comfort at the same time.

[0049] Optionally, continue to refer to Figure 1 as shown, it further includes a first air pressure sensor 66 and a second air pressure sensor 67;

[0050] The first air pressure sensor 66 is arranged on the first pipeline 3; the second air pressure sensor 67 is arranged on the second pipeline 4;

[0051] The control unit is communicatively connected to the first air pressure sensor 66 and the second air pressure sensor 67 respectively, and is used to obtain the pressure parameter before the throttle valve of the first air pressure sensor 66 and the pressure parameter after the throttle valve of the second air pressure sensor 67, and determine the throttle valve differential pressure parameter according to the pressure parameter before the throttle valve and the pressure parameter after the throttle valve.

[0052] Among them, the first air pressure sensor 66 can be used to detect the pressure parameter before the throttle valve in real time, and the second air pressure sensor 67 can be used to detect the pressure parameter after the throttle valve in real time. The control unit can calculate and determine the throttle valve differential pressure parameter according to the pressure parameter before the throttle valve and the pressure parameter after the throttle valve.

[0053] In some embodiments, it further includes a filtering unit 68; the filtering unit 68 is arranged on the third pipeline 5 and can be used to filter the fluid entering the supercharger 65 to ensure the reliability of the surge control system.

[0054] The technical solution of the embodiment of the present invention, by setting the first air pressure sensor and the second air pressure sensor, ensures the real-time acquisition of the throttle valve differential pressure parameter and ensures the normal operation of the surge control system.

[0055] Based on the same inventive concept, the embodiment of the present invention provides a surge control method, which is applied to a surge control system. Figure 2 is a flowchart of the first surge control method provided by the embodiment of the present invention. Combining Figure 1 and Figure 2 as shown, the surge control method includes:

[0056] S10. Obtain the throttle valve differential pressure parameter, the surge valve opening differential pressure threshold value, and the surge valve fully opening differential pressure threshold value.

[0057] Among them, the throttle valve differential pressure parameter can be the pressure difference before and after the throttle valve 61. The surge valve opening differential pressure threshold value can be the critical pressure difference before and after the throttle valve 61 when the surge valve 1 opens. When the surge valve 1 is in a slightly open state, it is unstable and prone to noise and abnormal noise. The surge valve fully opening differential pressure threshold value can be the critical pressure difference before and after the throttle valve 61 when the surge valve 1 is slightly open. Exemplarily, the surge valve opening differential pressure threshold value is a kPa, and the surge valve fully opening differential pressure threshold value is b kPa, where b > a. In some embodiments, 0 < b - a < 5 kPa is satisfied between the surge valve opening differential pressure threshold value a and the surge valve fully opening differential pressure threshold value b.

[0058] S11. Control the conduction between the inlet end and the first outlet end or between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully open pressure difference threshold.

[0059] Among them, when the throttle pressure difference parameter is less than the surge valve opening pressure difference threshold, it indicates that the pressure difference before and after the throttle 61 is small at this time, there is no surge problem, and the surge valve 1 is not opened, that is, there is no noise problem caused by the critical opening of the surge valve 1. At this time, the inlet end 21 is conducted with the first outlet end 22, and the gas path is conducted with the second pipeline 4; when the throttle pressure difference parameter is greater than the surge valve fully open pressure difference threshold, it indicates that the pressure difference before and after the throttle 61 is large at this time, and the surge valve 1 is fully opened, that is, there is no noise problem caused by the critical opening of the surge valve 1. At this time, the inlet end 21 is conducted with the first outlet end 22, and the gas path is conducted with the second pipeline 4; when the throttle pressure difference parameter is between the surge valve opening pressure difference threshold and the surge valve fully open pressure difference threshold, the surge valve 1 is in a slightly open state. At this time, control the inlet end 21 to be conducted with the second outlet end 23, so that the gas enters the third pipeline 5, resulting in a further increase in the pressure difference before and after the throttle 61, so that the surge valve 1 is fully opened, thereby avoiding the noise problem caused by critical opening.

[0060] The technical solution of the embodiment of the present invention obtains the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully open pressure difference threshold, and controls the conduction between the inlet end and the first outlet end or between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully open pressure difference threshold. When the surge valve is in critical opening, the three-way valve is used to fully open the surge valve, solve the noise problem caused by the critical opening of the surge valve, reduce the surge risk of the whole machine pipeline, and improve the ride comfort at the same time.

[0061] On the basis of the above embodiment, Figure 3 is a flowchart of the second surge control method provided by the embodiment of the present invention. As shown in combination with Figure 1 and Figure 3 , this surge control method includes:

[0062] S20. Obtain the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully open pressure difference threshold.

[0063] S21. When a < P < b is satisfied among the throttle pressure difference parameter P, the surge valve opening pressure difference threshold a, and the surge valve fully open pressure difference threshold b, control the inlet end to be conducted with the second outlet end.

[0064] Among them, when the throttle pressure difference parameter is between the surge valve opening pressure difference threshold and the surge valve fully opening pressure difference threshold, that is, when a < P < b, the surge valve 1 is in a slightly open state. At this time, due to critical opening, the surge valve 1 will vibrate irregularly, resulting in abnormal noise in the intake pipeline. At this time, the control unit controls the inlet end 21 of the three-way valve 2 to communicate with the second outlet end 23, so that gas enters the third pipeline 5, causing the pressure in front of the throttle valve 61 to increase, and the pressure difference before and after the throttle valve 61 to further increase, so that the surge valve 1 fully opens, thus avoiding the noise problem caused by critical opening.

[0065] The technical solution of the embodiment of the present invention can achieve the anti-surge effect while ensuring the overall machine performance, maintaining the smoothness of the gas flow in the pipeline, avoiding the irregular vibration of the valve body, improving the NVH performance, and making the overall machine operation safer.

[0066] Based on the above embodiments, Figure 4 is a flowchart of the third surge control method provided by the embodiment of the present invention. As shown in combination with Figure 1 and Figure 4 shown, the surge control method includes:

[0067] S30. Obtain the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold.

[0068] S31. When the throttle pressure difference parameter P, the surge valve opening pressure difference threshold a, and the surge valve fully opening pressure difference threshold b satisfy a < P < b, control the inlet end to communicate with the second outlet end.

[0069] S32. Continue to obtain the throttle pressure difference parameter.

[0070] Among them, after controlling the surge valve 1 to fully open, continue to obtain the throttle pressure difference parameter in real time, and continue to control the three-way valve 2 according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold, so as to ensure the vehicle's demand for intake air flow pressure and ensure that the intake air meets the overall machine performance requirements.

[0071] Based on the above embodiments, Figure 5 is a flowchart of the fourth surge control method provided by the embodiment of the present invention. As shown in combination with Figure 1 and Figure 5 shown, the surge control method includes:

[0072] S40. Obtain the throttle pressure difference parameter, the surge valve opening pressure difference threshold, and the surge valve fully opening pressure difference threshold.

[0073] S41. When the throttle pressure difference parameter P, the surge valve opening pressure difference threshold value a, and the surge valve fully opened pressure difference threshold value b satisfy a > P, control the inlet end to communicate with the first outlet end.

[0074] Among them, when the throttle pressure difference parameter is less than the surge valve opening pressure difference threshold value, that is, a > P, it indicates that the pressure difference before and after the throttle 61 is small at this time, there is no surge problem, the surge valve 1 does not open, that is, there is no noise problem caused by the critical opening of the surge valve 1. At this time, the inlet end 21 communicates with the first outlet end 22, and the gas path communicates with the second pipeline 4.

[0075] Based on the above embodiments, Figure 6 is a flowchart of the fifth surge control method provided by an embodiment of the present invention. Combining Figure 1 and Figure 6 as shown, the surge control method includes:

[0076] S50. Obtain the throttle pressure difference parameter, the surge valve opening pressure difference threshold value, and the surge valve fully opened pressure difference threshold value.

[0077] S51. When the throttle pressure difference parameter P, the surge valve opening pressure difference threshold value a, and the surge valve fully opened pressure difference threshold value b satisfy P > b, control the inlet end to communicate with the first outlet end.

[0078] Among them, when the throttle pressure difference parameter is greater than the surge valve fully opened pressure difference threshold value, it indicates that the pressure difference before and after the throttle 61 is large at this time, the vehicle is not in the state of driving with a large throttle, the surge valve 1 directly opens fully, the third end 13 of the surge valve 1 communicates with the third pipeline 5, and there is no noise problem caused by the critical opening of the surge valve 1. At this time, the inlet end 21 communicates with the first outlet end 22, and the gas path communicates with the second pipeline 4.

[0079] The technical solution of the embodiment of the present invention controls the inlet end to continuously communicate with the first outlet end when the throttle pressure difference parameter is greater than the surge valve fully opened pressure difference threshold value or when the throttle pressure difference parameter is less than the surge valve opening pressure difference threshold value, ensuring the normal operation of the surge control system in the non-critical opening state of the surge valve.

[0080] Based on the above embodiments, Figure 7 is a flowchart of the sixth surge control method provided by an embodiment of the present invention. Combining Figure 1 and Figure 7 as shown, the surge control method includes:

[0081] S60. Obtain the pressure parameter before the throttle, the pressure parameter after the throttle, the surge valve opening pressure difference threshold value, and the surge valve fully opened pressure difference threshold value.

[0082] Among them, the pressure parameter before the throttle valve can be obtained by the first air pressure sensor 66 arranged on the first pipeline 3, and the pressure parameter after the throttle valve can be obtained by the second air pressure sensor 67 arranged on the second pipeline 4.

[0083] S61. Determine the throttle valve differential pressure parameter according to the pressure parameter before the throttle valve and the pressure parameter after the throttle valve.

[0084] Among them, the control unit can calculate and determine the throttle valve differential pressure parameter according to the pressure parameter before the throttle valve and the pressure parameter after the throttle valve. The pressure parameter PTP before the throttle valve, the pressure parameter MAP after the throttle valve, and the throttle valve differential pressure parameter P satisfy P = PTP - MAP.

[0085] S62. Control the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle valve differential pressure parameter, the surge valve opening differential pressure threshold, and the surge valve fully open differential pressure threshold.

[0086] The technical solution of the embodiment of the present invention ensures the real-time acquisition of the throttle valve differential pressure parameter and the normal operation of the surge control system by collecting the pressure parameter before the throttle valve and the pressure parameter after the throttle valve in real time and calculating the throttle valve differential pressure parameter according to the pressure parameter before the throttle valve and the pressure parameter after the throttle valve.

[0087] It should be understood that the various forms of the flow shown above can be used, and the steps can be reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0088] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A surge control system, characterized in that, It includes a surge valve, a three-way valve, and a control unit; The first end of the surge valve is communicated with the first pipeline between the throttle valve and the intercooler; the second end of the surge valve is communicated with the second pipeline between the throttle valve and the intake manifold; the third end of the surge valve is communicated with the third pipeline between the intake passage and the supercharger; The three-way valve is arranged between the second end of the surge valve and the second pipeline; the inlet end of the three-way valve is communicated with the second end of the surge valve; the first outlet end of the three-way valve is communicated with the second pipeline; the second outlet end of the three-way valve is communicated with the third pipeline; The control unit is communicatively connected with the three-way valve and is used for obtaining the throttle pressure difference parameter, the surge valve opening pressure difference threshold value, and the surge valve fully opening pressure difference threshold value; and controlling the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold value, and the surge valve fully opening pressure difference threshold value.

2. The surge control system according to claim 1, wherein It further includes a first air pressure sensor and a second air pressure sensor; The first air pressure sensor is arranged on the first pipeline; the second air pressure sensor is arranged on the second pipeline; The control unit is respectively communicatively connected with the first air pressure sensor and the second air pressure sensor and is used for obtaining the pressure parameter in front of the throttle valve of the first air pressure sensor and the pressure parameter behind the throttle valve of the second air pressure sensor, and determining the throttle pressure difference parameter according to the pressure parameter in front of the throttle valve and the pressure parameter behind the throttle valve.

3. The surge control system according to claim 1, wherein It further includes a filtering unit; The filtering unit is arranged on the third pipeline.

4. A surge control method, characterized in that, It is applied to the surge control system according to any one of claims 1-3; the surge control method includes: Obtaining the throttle pressure difference parameter, the surge valve opening pressure difference threshold value, and the surge valve fully opening pressure difference threshold value; Controlling the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold value, and the surge valve fully opening pressure difference threshold value.

5. The surge control method according to claim 4, wherein Controlling the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold value, and the surge valve fully opening pressure difference threshold value includes: When a < P < b among the throttle pressure difference parameter P, the surge valve opening pressure difference threshold value a, and the surge valve fully opening pressure difference threshold value b, controlling the conduction between the inlet end and the second outlet end.

6. The surge control method according to claim 5, wherein After controlling the conduction between the inlet end and the second outlet end, it further includes: Continuing to obtain the throttle pressure difference parameter.

7. The surge control method according to claim 4, characterized in that, Controlling the conduction between the inlet end and the first outlet end or the conduction between the inlet end and the second outlet end of the three-way valve according to the throttle pressure difference parameter, the surge valve opening pressure difference threshold value, and the surge valve fully opening pressure difference threshold value includes: When a > P among the throttle pressure difference parameter P, the surge valve opening pressure difference threshold value a, and the surge valve fully opening pressure difference threshold value b, controlling the conduction between the inlet end and the first outlet end.

8. The surge control method according to claim 4, characterized in that Controlling the conduction between the inlet end and the first outlet end or between the inlet end and the second outlet end of the three-way valve according to the throttle differential pressure parameter, the surge valve opening differential pressure threshold, and the surge valve fully opening differential pressure threshold includes: When the throttle differential pressure parameter P, the surge valve opening differential pressure threshold a, and the surge valve fully opening differential pressure threshold b satisfy P > b, controlling the conduction between the inlet end and the first outlet end.

9. The surge control method according to claim 4, wherein, Obtaining the throttle differential pressure parameter includes: Obtaining the pressure parameter before the throttle and the pressure parameter after the throttle; Determining the throttle differential pressure parameter according to the pressure parameter before the throttle and the pressure parameter after the throttle.

10. The surge control method according to claim 4, characterized in that, The surge valve opening differential pressure threshold a and the surge valve fully opening differential pressure threshold b satisfy 0 < b - a < 5 kPa.

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