Method, device and equipment for determining opening position of waste gas bypass valve, storage medium and product
By determining the initial position and calculating the compensation amount to adjust the opening of the exhaust bypass valve, the wear problem caused by the pressure fluctuation of the exhaust bypass valve was solved, thus improving the system stability and NVH performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING CO WHEELS TECH CO LTD
- Filing Date
- 2024-10-24
- Publication Date
- 2026-04-24
AI Technical Summary
In existing technologies, when the exhaust bypass valve is close to fully closed or the opening degree changes only slightly, the boost pressure changes significantly, causing fluctuations in the desired position and making it prone to wear.
By determining the initial position and obtaining the actual boost pressure and speed, the compensation amount is calculated to adjust the opening position of the exhaust bypass valve, including target control mode and slow exit mode, to reduce position fluctuations.
It reduces wear on the exhaust bypass valve, improves system stability, avoids impacts at extreme positions, and improves the NVH performance of the range extender.
Smart Images
Figure CN121916074A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of waste gas bypass valve control technology, and in particular to a method, apparatus, equipment, computer-readable storage medium, and computer program product for determining the opening position of a waste gas bypass valve. Background Technology
[0002] With increasingly stringent energy conservation and environmental protection requirements, more and more engines are being equipped with turbocharging technology. Improving turbocharger performance is a crucial measure for enhancing engine performance and reducing emissions. Among the components, the wastegate valve is an important part of turbocharging. By controlling the position and opening of the wastegate valve, the flow of exhaust gas from the engine outlet towards the turbine can be controlled, or the flow of exhaust gas towards the turbine can be prevented.
[0003] In related technologies, the desired flow rate and desired pressure ratio of the waste gas bypass valve are obtained. The desired position corresponding to the desired flow rate and desired pressure ratio is found in the desired boost pressure lookup table, and this desired position is used as the final control position of the waste gas bypass valve to achieve control of the waste gas bypass valve. However, when the waste gas bypass valve is close to fully closed or the actual opening degree of the waste gas bypass valve changes little, it will cause a large change in the actual boost pressure. Thus, under the high load condition of the range extender, the calculated desired position of the waste gas bypass valve will fluctuate, which may cause the waste gas bypass valve to hit the limit position, resulting in unnecessary wear of the waste gas bypass valve. Summary of the Invention
[0004] This application provides a method, apparatus, device, computer-readable storage medium, and computer program product for determining the opening position of an exhaust gas bypass valve, which can reduce wear on the exhaust gas bypass valve.
[0005] The technical solution of this application embodiment is implemented as follows:
[0006] This application provides a method comprising:
[0007] Determine the initial position corresponding to the first flow rate and the first pressure ratio; the first flow rate is the flow rate of the waste gas flowing through the waste gas bypass valve; the first pressure ratio is the gas pressure ratio at both ends of the waste gas bypass valve; the initial position is the initially determined opening position of the waste gas bypass valve;
[0008] If the initial opening value corresponding to the initial position is less than or equal to the first preset value, the actual boost pressure of the waste gas bypass valve and the current speed of the range extender are obtained.
[0009] The compensation amount is determined based on the initial position, the actual boost pressure, and the current rotational speed.
[0010] The first position of the waste gas bypass valve is compensated using the compensation amount to obtain the target position of the waste gas bypass valve. The first position includes the first preset value or the previous target position determined last time.
[0011] In the above scheme, determining the compensation amount based on the initial position, the actual boost pressure, and the current rotational speed includes:
[0012] Obtain the first boost pressure when the first flow rate is determined;
[0013] Determine the deviation between the actual boost pressure and the first boost pressure;
[0014] In the table of correspondence between preset deviation, preset speed and preset compensation amount, determine the compensation amount corresponding to the deviation and the current speed.
[0015] In the above scheme, when the initial opening value corresponding to the initial position is less than or equal to a first preset value, obtaining the actual boost pressure of the waste gas bypass valve and the current speed of the range extender includes:
[0016] If the initial opening value is less than or equal to the first preset value, the target control mode for the waste gas bypass valve is activated.
[0017] In the target control mode, the actual boost pressure of the exhaust bypass valve and the current speed of the range extender are obtained;
[0018] Accordingly, the step of compensating the first position of the waste gas bypass valve using the compensation amount to obtain the target position of the waste gas bypass valve includes:
[0019] When the target control mode is activated for the first time after the exhaust gas bypass valve is started, the first preset value is compensated by the compensation amount to obtain the target position of the exhaust gas bypass valve.
[0020] If the target control mode is not activated for the first time after the exhaust bypass valve is started, the previous position information value corresponding to the previous target position of the exhaust bypass valve is obtained.
[0021] The target position is obtained by compensating the previous position information value using the compensation amount.
[0022] In the above scheme, after compensating the first position of the waste gas bypass valve with the compensation amount to obtain the target position of the waste gas bypass valve, the method further includes:
[0023] When the periodic update time is reached, determine the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve;
[0024] If the next initial opening value corresponding to the next initial position is greater than the first preset value and less than the second preset value, the target control mode of the waste gas bypass valve is exited, and the slow exit mode of the waste gas bypass valve is started.
[0025] In the slow exit mode, obtain the preset adjustment parameters;
[0026] The next initial position is adjusted using the preset adjustment parameters to obtain the next target position of the waste gas bypass valve.
[0027] In the above scheme, after adjusting the next initial position using the preset adjustment parameters to obtain the next target position of the waste gas bypass valve, the method further includes:
[0028] In the slow exit mode, when each periodic update time arrives, the first target position determined by the previous periodic update time is adjusted using the preset adjustment parameters until the opening value corresponding to the adjusted target position is less than or equal to the initial opening value, at which point the slow exit mode of the exhaust bypass valve is exited.
[0029] In the slow exit mode, when any periodic update time is reached and any opening value of any initial position determined for any periodic update time is greater than or equal to the second preset value, the slow exit mode of the exhaust bypass valve is exited.
[0030] In the slow exit mode, when any periodic update time is reached and any opening value of any initial position determined for any periodic update time is less than the first preset value, the target control mode of the waste gas bypass valve is restarted.
[0031] In the above scheme, after determining the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve when the periodic update time is reached, the method further includes:
[0032] If the next initial opening value corresponding to the next initial position is greater than the second preset value, it is determined to exit the target control mode of the waste gas bypass valve.
[0033] In the above scheme, after determining the initial position corresponding to the first flow rate and the first pressure ratio, the method further includes:
[0034] If the initial opening value is greater than the first preset value, the initial position is determined as the target position.
[0035] This application provides a device for determining the opening position of an exhaust gas bypass valve, comprising:
[0036] A determining unit is used to determine an initial position corresponding to a first flow rate and a first pressure ratio; the first flow rate is the flow rate of waste gas flowing through the waste gas bypass valve; the first pressure ratio is the gas pressure ratio at both ends of the waste gas bypass valve; the initial position is the initially determined opening position of the waste gas bypass valve; and a compensation amount is determined based on the initial position, the actual boost pressure, and the current rotational speed.
[0037] The acquisition unit is used to acquire the actual boost pressure of the waste gas bypass valve and the current speed of the range extender when the initial opening value corresponding to the initial position is less than or equal to a first preset value.
[0038] The compensation unit is used to compensate the first position of the waste gas bypass valve using the compensation amount to obtain the target position of the waste gas bypass valve. The first position includes the first preset value or the previous target position determined last time.
[0039] In the above scheme, the acquisition unit is used to acquire the first boost pressure when the first flow rate is determined;
[0040] The determining unit is used to determine the deviation between the actual boost pressure and the first boost pressure; and to determine the compensation amount corresponding to the deviation and the current speed in a table of correspondences between preset deviation, preset speed and preset compensation amount.
[0041] In the above scheme, the device further includes a starting unit;
[0042] The starting unit is used to start the target control mode of the waste gas bypass valve when the initial opening value is less than or equal to the first preset value.
[0043] The acquisition unit is used to acquire the actual boost pressure of the exhaust bypass valve and the current speed of the range extender under the target control mode;
[0044] Accordingly, the compensation unit is used to compensate the first preset value using the compensation amount when the target control mode is first activated after the waste gas bypass valve is started, so as to obtain the target position of the waste gas bypass valve; and to compensate the previous position information value using the compensation amount to obtain the target position.
[0045] The acquisition unit is used to acquire the previous position information value corresponding to the previous target position of the waste gas bypass valve when the target control mode is not started for the first time after the waste gas bypass valve is started.
[0046] In the above scheme, the device further includes an exit unit and an adjustment unit;
[0047] The determining unit is used to determine the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve when the periodic update time is reached.
[0048] The exit unit is used to exit the target control mode of the waste gas bypass valve when the next initial opening value corresponding to the next initial position is greater than the first preset value and less than the second preset value.
[0049] The starting unit is used to initiate a slow exit mode for the waste gas bypass valve to exit the target control mode.
[0050] The acquisition unit is used to acquire preset adjustment parameters in the slow exit mode;
[0051] The adjustment unit is used to adjust the next initial position using the preset adjustment parameters to obtain the next target position of the waste gas bypass valve.
[0052] In the above scheme, the adjustment unit is used to adjust the first target position determined by the previous periodic update time using the preset adjustment parameters when the slow exit mode is reached, until the opening value corresponding to the adjusted target position is less than or equal to the initial opening value, and then exit the slow exit mode of the exhaust gas bypass valve.
[0053] The exit unit is used to exit the slow exit mode of the exhaust gas bypass valve when any periodic update time is reached and any opening value of any initial position determined for any periodic update time is greater than or equal to the second preset value.
[0054] The starting unit is used to restart the target control mode of the waste gas bypass valve when any periodic update time is reached and any opening value of any initial position determined by any periodic update time is less than the first preset value in the slow exit mode.
[0055] In the above scheme, the determining unit is used to determine to exit the target control mode of the waste gas bypass valve when the next initial opening value corresponding to the next initial position is greater than the second preset value.
[0056] In the above scheme, the determining unit is used to determine the initial position as the target position when the initial opening value is greater than the first preset value.
[0057] This application embodiment also provides a device for determining the opening position of an exhaust gas bypass valve, the device comprising:
[0058] Memory is used to store executable instructions for a computer;
[0059] The processor, when executing computer-executable instructions stored in the memory, implements the method for determining the opening position of the waste gas bypass valve provided in the embodiments of this application.
[0060] This application provides a computer-readable storage medium storing computer-executable instructions. When executed by a processor, the computer-executable instructions implement the method for determining the opening position of the waste gas bypass valve provided in this application.
[0061] This application provides a computer program product, including a computer program or computer-executable instructions. When the computer program or computer-executable instructions are executed by a processor, they implement the method for determining the opening position of the waste gas bypass valve provided in this application.
[0062] The embodiments of this application have the following beneficial effects: When the waste gas bypass valve opening position determination device determines the initial position corresponding to the first flow rate and the first pressure ratio, and the initial opening value corresponding to the initial position is less than or equal to the first preset value, that is, when the waste gas bypass valve is close to fully closed or the actual opening of the waste gas bypass valve changes little, it obtains the actual boost pressure of the waste gas bypass valve and the current speed of the range extender, and determines the compensation amount based on the initial position, the actual boost pressure, and the current speed. The compensation amount is then used to compensate for the opening corresponding to the first preset value or for the previously determined target position, so as to reduce the difference between the determined position of the waste gas bypass valve and the previously determined position. That is, under the high load condition of the range extender, the calculated expected position of the waste gas bypass valve is avoided from fluctuating, thereby avoiding the waste gas bypass valve hitting the limit position and reducing the wear on the waste gas bypass valve. Attached Figure Description
[0063] Figure 1 This is a flowchart illustrating a method for determining the opening position of an exhaust gas bypass valve according to an embodiment of this application.
[0064] Figure 2This is a flowchart illustrating an exemplary method for determining the opening position of an exhaust gas bypass valve, as provided in an embodiment of this application.
[0065] Figure 3 This is a schematic diagram of the structural composition of an exhaust gas bypass valve opening position determination device provided in an embodiment of this application;
[0066] Figure 4 This is a schematic diagram of the composition structure of a device for determining the opening position of an exhaust gas bypass valve provided in an embodiment of this application.
[0067] It should be noted that the terms "first" and "second" mentioned above are only used to distinguish between different options and do not represent the degree of superiority or inferiority of the options or their priority in the implementation process. Detailed Implementation
[0068] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0069] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.
[0070] In the following description, the terms "first, second, third" are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.
[0071] In this application embodiment, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.
[0072] Unless otherwise defined, all technical and scientific terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the embodiments of this application is for the purpose of describing the embodiments of this application only and is not intended to limit this application.
[0073] In the implementation of this application, the collection and processing of relevant data should strictly comply with the requirements of relevant national laws and regulations, obtain the informed consent or separate consent of the personal information subject, and carry out subsequent data use and processing within the scope of laws and regulations and the authorization of the personal information subject.
[0074] Before providing a further detailed description of the embodiments of this application, the nouns and terms involved in the embodiments of this application will be explained, and the nouns and terms involved in the embodiments of this application shall be interpreted as follows.
[0075] 1) Electronic Waste Gate (EWG).
[0076] 2) Vibration and noise (NVH).
[0077] This application provides a method for determining the opening position of an exhaust gas bypass valve, which is applied to an exhaust gas bypass valve opening position determination device. Figure 1 A method for determining the opening position of an exhaust gas bypass valve provided in this application embodiment. Figure 1 ,like Figure 1 As shown, the method for determining the opening position of the waste gas bypass valve may include:
[0078] S101. Determine the initial position corresponding to the first flow rate and the first pressure ratio.
[0079] The method for determining the opening position of an exhaust gas bypass valve provided in this application embodiment is applicable to scenarios where the opening position of an exhaust gas bypass valve needs to be determined.
[0080] In the embodiments of this application, the device for determining the opening position of the exhaust gas bypass valve can be implemented in various forms. For example, the device for determining the opening position of the exhaust gas bypass valve described in this application may include devices such as servers, vehicle systems, and cloud computing. The specific device for determining the opening position of the exhaust gas bypass valve can be determined according to the actual situation, and this application embodiment does not limit this.
[0081] It should be noted that the first flow rate is the flow rate of the waste gas passing through the waste gas bypass valve; the first pressure ratio is the pressure ratio between the two ends of the waste gas bypass valve, specifically the pressure ratio between the output end of the waste gas bypass valve and the input end of the waste gas bypass valve; the initial position is the initially determined opening position of the waste gas bypass valve, that is, the initial position is the initially determined opening information of the waste gas bypass valve.
[0082] In the embodiments of this application, the first flow rate can be the flow rate transmitted from other devices in the vehicle system to the exhaust gas bypass valve opening position determination device, or it can be the flow rate that the exhaust gas bypass valve is expected to achieve, obtained by the exhaust gas bypass valve opening position determination device through other means. The specific method by which the exhaust gas bypass valve opening position determination device obtains the first flow rate can be determined according to the actual situation, and this application embodiment does not limit it.
[0083] It should be noted that the first flow rate can be the flow rate determined based on the first boost pressure. The first boost pressure, also known as the desired boost pressure, can be used to determine the desired flow rate at the turbocharger turbine end. Since the total flow rate of the entire exhaust system (i.e., the sum of the turbine end flow rate and the wastegate flow rate) is known, the wastegate flow rate can be determined based on the total flow rate and the desired flow rate at the turbocharger turbine end, thus determining the first flow rate. Specifically, the method of determining the first flow rate based on the first boost pressure is existing technology, and this application does not limit this aspect.
[0084] In this embodiment, the first pressure ratio can be information transmitted from other devices to the waste gas bypass valve opening position determination device, or it can be the pressure ratio information that the waste gas bypass valve is expected to achieve, obtained by the waste gas bypass valve opening position determination device, or it can be information obtained by the waste gas bypass valve opening position determination device through other means. The specific method by which the waste gas bypass valve opening position determination device obtains the first pressure ratio can be determined according to the actual situation, and this embodiment does not limit it.
[0085] In this embodiment of the application, a desired pressure gauge is provided. The desired pressure gauge has a correspondence between a preset pressure ratio, a preset flow rate, and a preset opening degree. When a first flow rate and a first pressure ratio are obtained, the opening degree information corresponding to the first flow rate and the first pressure ratio can be found in the desired pressure gauge, that is, the initial position can be obtained.
[0086] It should be noted that the desired boosting pressure gauge can be an information table configured in the waste gas bypass valve opening position determination device, or it can be information transmitted from other devices to the waste gas bypass valve opening position determination device, or it can be information obtained by the waste gas bypass valve opening position determination device through other means. The specific way in which the waste gas bypass valve opening position determination device obtains the desired boosting pressure gauge can be determined according to the actual situation, and this application embodiment does not limit it in this way.
[0087] In this embodiment, the initial opening information of the waste gas bypass valve, i.e., the initial position, can also be determined by other methods based on the first flow rate and the first pressure ratio. Specifically, the method of determining the initial position corresponding to the first flow rate and the first pressure ratio is prior art, and this embodiment does not limit it.
[0088] In this embodiment, the waste gas bypass valve opening position determination device can periodically update and determine the target position of the waste gas bypass valve. The period can be 10 milliseconds or other time lengths. The specific time length can be determined according to the actual situation, and this embodiment does not limit it.
[0089] It should be noted that the waste gas bypass valve opening position determination device can determine the initial position corresponding to the first flow rate and the first pressure ratio when the current periodic update time is reached, and determine the target position of the waste gas bypass valve based on the initial position.
[0090] S102. When the initial opening value corresponding to the initial position is less than or equal to the first preset value, obtain the actual boost pressure of the waste gas bypass valve and the current speed of the range extender.
[0091] In this embodiment, after the waste gas bypass valve opening position determining device determines the initial position corresponding to the first flow rate and the first pressure ratio, if the initial opening value corresponding to the initial position is less than or equal to the first preset value, it obtains the actual boost pressure of the waste gas bypass valve and the current speed of the range extender.
[0092] It should be noted that the method for determining the opening position of the waste gas bypass valve in this application only applies to the case where the range extender is under high load, i.e., when the desired position of the waste gas bypass valve is small. Specifically, if the initial opening value corresponding to the initial position is less than or equal to the first preset value, it is determined that the case belongs to the case where the desired position of the waste gas bypass valve is small.
[0093] In this embodiment, the first preset value can be a preset opening degree of the waste gas bypass valve. The first preset value can be information configured in the waste gas bypass valve opening position determination device, information transmitted from other devices to the waste gas bypass valve opening position determination device, or information obtained by the waste gas bypass valve opening position determination device through other means. The specific method by which the waste gas bypass valve opening position determination device obtains the first preset value can be determined according to actual circumstances, and this embodiment does not limit this.
[0094] For example, the first preset value can be 8, that is, the preset opening degree of the waste gas bypass valve is 8%; the first preset value can also be other values, and the specific parameter value of the first preset value can be determined according to the actual situation. This application embodiment does not limit this.
[0095] In this embodiment of the application, the rotational speed of the range extender at the current moment can be detected to obtain the current rotational speed.
[0096] In the embodiments of this application, the actual boost pressure of the waste gas bypass valve can be measured using a sensor.
[0097] In this embodiment of the application, after the waste gas bypass valve opening position determining device determines the initial position corresponding to the first flow rate and the first pressure ratio, if the initial opening value is greater than the first preset value, the initial position is determined as the target position.
[0098] It should be noted that if the initial opening value is greater than the first preset value, it is considered that the range extender is not under heavy load, i.e., it does not fall under the condition where the expected position of the waste gas bypass valve is small. In this case, the determined initial position of the waste gas bypass valve is directly set as the target position of the waste gas bypass valve.
[0099] S103. Determine the compensation amount based on the initial position, actual boost pressure, and current speed.
[0100] In this embodiment of the application, after the waste gas bypass valve opening position determination device obtains the actual boost pressure of the waste gas bypass valve and the current speed of the range extender, it determines the compensation amount based on the initial position, the actual boost pressure and the current speed.
[0101] In this embodiment of the application, the process of determining the compensation amount by the waste gas bypass valve opening position determination device based on the initial position, actual boost pressure and current rotation speed includes: obtaining the first boost pressure when the first flow rate is determined; determining the deviation between the actual boost pressure and the first boost pressure; and determining the compensation amount corresponding to the deviation and the current rotation speed in a preset table of correspondence between the preset deviation, preset rotation speed and preset compensation amount.
[0102] In this embodiment of the application, the deviation between the actual boost pressure and the first boost pressure can be determined by subtracting the first boost pressure from the actual boost pressure, which is the deviation.
[0103] In this embodiment, the waste gas bypass valve opening position determination device is provided with a correspondence table of preset deviation, preset speed and preset compensation amount. The compensation amount can be obtained by looking up the compensation information corresponding to the deviation and the current speed in the correspondence table.
[0104] In this embodiment, the correspondence can be information configured in the waste gas bypass valve opening position determination device, information transmitted from other devices to the waste gas bypass valve opening position determination device, or information obtained by the waste gas bypass valve opening position determination device through other means. The specific way in which the waste gas bypass valve opening position determination device obtains the correspondence table can be determined according to the actual situation, and this embodiment does not limit it.
[0105] In this embodiment of the application, an exemplary correspondence table of preset deviation, preset rotational speed, and preset compensation amount is shown in Table 1:
[0106] Table 1
[0107] 1200 1600 2000 2500 3000 3000 -8 -0.4 -0.3 -0.2 -0.2 -0.1 -0.1 -5 -0.2 -0.2 -0.1 -0.1 -0.1 -0.1 0 0 0 0 0 0 0 5 0.5 0.4 0.4 0.3 0.3 0.2 10 0.6 0.5 0.4 0.4 0.3 0.3 15 0.7 0.6 0.5 0.5 0.6 0.4
[0108] It should be noted that the values in Table 1 are examples and do not represent actual values.
[0109] In Table 1, the data in the first column is the preset deviation, the data in the first row is the preset speed, and the remaining data in Table 1 excluding the data in the first row and the first column are the preset compensation amounts.
[0110] S104. The first position of the waste gas bypass valve is compensated using the compensation amount to obtain the target position of the waste gas bypass valve.
[0111] In this embodiment of the application, after the waste gas bypass valve opening position determination device determines the compensation amount based on the initial position, actual boost pressure and current rotation speed, it can use the compensation amount to compensate for the first position of the waste gas bypass valve to obtain the target position of the waste gas bypass valve.
[0112] It should be noted that the first position includes the first preset value or the previous target position determined last time.
[0113] In the embodiments of this application, the target location is the final determined opening information of the waste gas bypass valve.
[0114] In this embodiment, the process of the waste gas bypass valve opening position determination device acquiring the actual boost pressure of the waste gas bypass valve and the current speed of the range extender when the initial opening value corresponding to the initial position is less than or equal to a first preset value includes: activating the target control mode for the waste gas bypass valve when the initial opening value is less than or equal to the first preset value; acquiring the actual boost pressure of the waste gas bypass valve and the current speed of the range extender under the target control mode; correspondingly, the process of the waste gas bypass valve opening position determination device compensating the first position of the waste gas bypass valve with a compensation amount to obtain the target position of the waste gas bypass valve includes: when the target control mode is activated for the first time after the waste gas bypass valve is activated, compensating the first preset value with a compensation amount to obtain the target position of the waste gas bypass valve; when the target control mode is not activated for the first time after the waste gas bypass valve is activated, acquiring the previous position information value corresponding to the previous target position of the previously determined waste gas bypass valve; compensating the previous position information value with a compensation amount to obtain the target position.
[0115] In this embodiment, the target control mode of the waste gas bypass valve is the mode that accurately determines the position of the waste gas bypass valve. The target control mode of the waste gas bypass valve can be the mode configured in the waste gas bypass valve opening position determination device.
[0116] In this embodiment of the application, after the target control mode of the exhaust gas bypass valve is activated, the exhaust gas bypass valve opening position determination device will obtain the actual boost pressure of the exhaust gas bypass valve and the current speed of the range extender.
[0117] In this embodiment, the current rotational speed is obtained by detecting the rotational speed of the range extender at the current moment. The actual boost pressure of the exhaust bypass valve is measured using a sensor.
[0118] In this embodiment of the application, the method of obtaining the target position of the waste gas bypass valve by compensating the first preset value with the compensation amount can be to determine the sum of the compensation amount and the first preset value, thereby obtaining the opening value corresponding to the target position, that is, obtaining the target position.
[0119] In this embodiment of the application, the method of obtaining the target position by compensating the previous position information value with the compensation amount can be to determine the sum of the compensation amount and the opening value corresponding to the previous position information value, thereby obtaining the opening value corresponding to the target position of the current waste gas bypass valve, that is, obtaining the target position.
[0120] It should be noted that the previous target position refers to the target position of the exhaust bypass valve that was determined last time in the target control mode. That is, in the target control mode, the target position of the exhaust bypass valve was determined when the previous periodic update time of the current periodic update time arrived.
[0121] In this embodiment, the waste gas bypass valve opening position determination device compensates for the first position of the waste gas bypass valve using a compensation amount. After obtaining the target position of the waste gas bypass valve, when the periodic update time is reached, it determines the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve. If the next initial opening value corresponding to the next initial position is greater than a first preset value and less than a second preset value, it exits the target control mode of the waste gas bypass valve and starts a slow exit mode of the slow exit target control mode of the waste gas bypass valve. In the slow exit mode, it obtains preset adjustment parameters and adjusts the next initial position using the preset adjustment parameters to obtain the next target position of the waste gas bypass valve.
[0122] In this embodiment of the application, the method of obtaining the next first flow rate and the next first pressure ratio is the same as the method of obtaining the first flow rate and the first pressure ratio. Specifically, the method of obtaining the next first flow rate and the next first pressure ratio can refer to the method of obtaining the first flow rate and the first pressure ratio.
[0123] In this embodiment of the application, the method for determining the next initial position corresponding to the next first flow rate and the next first pressure ratio is the same as the method for determining the initial position corresponding to the first flow rate and the first pressure ratio. For the specific method for determining the next initial position corresponding to the next first flow rate and the next first pressure ratio, please refer to the method for determining the initial position corresponding to the first flow rate and the first pressure ratio.
[0124] In this embodiment of the application, the periodic update time is the next periodic update time after the current periodic update time.
[0125] In this embodiment, the second preset value can be a preset opening degree of the waste gas bypass valve. The second preset value can be information configured in the waste gas bypass valve opening position determination device, information transmitted from other devices to the waste gas bypass valve opening position determination device, or information obtained by the waste gas bypass valve opening position determination device through other means. The specific method by which the waste gas bypass valve opening position determination device obtains the second preset value can be determined according to actual circumstances, and this embodiment does not limit this.
[0126] For example, the second preset value can be 12, that is, the preset opening degree of the waste gas bypass valve is 12%; the second preset value can also be other values, and the specific parameter value of the second preset value can be determined according to the actual situation. This application embodiment does not limit this.
[0127] In this embodiment, if the next initial opening value is greater than the first preset value, it is determined that the range extender is not under high load, i.e., it is not under the condition that the expected position of the waste gas bypass valve is small. However, in order to avoid the waste gas bypass valve opening position determination method in the target control mode from fluctuating between the waste gas bypass valve opening position determination method in the prior art, a slow exit mode can be set. The slow exit mode is used to slowly exit the target control mode, thereby avoiding the difference between the waste gas bypass valve target opening determined in the target control mode and the waste gas bypass valve target opening determined in the prior art being too large.
[0128] In this embodiment, the preset adjustment parameter can be a parameter configured in the waste gas bypass valve opening position determination device, a parameter transmitted from other devices to the waste gas bypass valve opening position determination device, or a parameter obtained by the waste gas bypass valve opening position determination device through other means. The specific way in which the waste gas bypass valve opening position determination device obtains the preset adjustment parameter can be determined according to the actual situation, and this embodiment does not limit it.
[0129] In this embodiment, the waste gas bypass valve opening position determination device adjusts the next initial position using preset adjustment parameters. After obtaining the next target position of the waste gas bypass valve, in the slow exit mode, at each periodic update time, the first target position determined by the previous periodic update time is adjusted using preset adjustment parameters until the opening value corresponding to the adjusted target position is less than or equal to the initial opening value, at which point the slow exit mode for the waste gas bypass valve is exited. In the slow exit mode, when any periodic update time is reached and any opening value of any initial position determined by any periodic update time is greater than or equal to a second preset value, the slow exit mode for the waste gas bypass valve is exited. In the slow exit mode, when any periodic update time is reached and any opening value of any initial position determined by any periodic update time is less than the first preset value, the target control mode for the waste gas bypass valve is restarted.
[0130] In this embodiment of the application, when the periodic update time is reached, the waste gas bypass valve opening position determination device determines the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve. If the next initial opening value corresponding to the next initial position is greater than the second preset value, it determines to exit the target control mode of the waste gas bypass valve.
[0131] In this embodiment, if the next initial opening value is greater than the second preset value, it is determined that the range extender is not under high load, i.e., it does not fall under the condition where the desired position of the waste gas bypass valve is small. At this time, the target control mode of the waste gas bypass valve is directly exited, and the target position of the waste gas bypass valve is determined according to the method in the prior art.
[0132] It is understood that the method for determining the opening position of the exhaust bypass valve in the embodiments of this application can solve the problem of exhaust bypass valve fluctuation caused by the range extender under high load conditions, avoid the exhaust bypass valve hitting the limit position, thereby reducing the NVH of the range extender and providing better service for passengers in the vehicle.
[0133] In this embodiment of the application, an exemplary method for determining the opening position of an exhaust gas bypass valve is as follows: Figure 2 As shown:
[0134] S1. Determine the initial position corresponding to the first flow rate and the first pressure ratio.
[0135] It should be noted that the first flow rate is the flow rate of the waste gas passing through the waste gas bypass valve; the first pressure ratio is the gas pressure ratio at both ends of the waste gas bypass valve; and the initial position is the initially determined opening position of the waste gas bypass valve.
[0136] S2. When the initial opening value is less than or equal to the first preset value, start the target control mode for the waste gas bypass valve; and in the target control mode, obtain the actual boost pressure of the waste gas bypass valve and the current speed of the range extender.
[0137] S3. Determine the compensation amount based on the initial position, actual boost pressure, and current speed.
[0138] S4. When the target control mode is activated for the first time after the waste gas bypass valve is started, the first preset value is compensated by the compensation amount to obtain the target position of the waste gas bypass valve.
[0139] S5. If the target control mode is not started for the first time after the waste gas bypass valve is started, obtain the previous position information value corresponding to the previous target position of the waste gas bypass valve that was determined last time; use the compensation amount to compensate the previous position information value to obtain the target position.
[0140] After step S3 is completed, proceed to step S4 or S5.
[0141] S6. When the periodic update time is reached, determine the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve.
[0142] S7. If the next initial opening value corresponding to the next initial position is greater than the first preset value and less than the second preset value, exit the target control mode for the waste gas bypass valve and start the slow exit mode for the waste gas bypass valve.
[0143] S8. In slow exit mode, obtain the preset adjustment parameters; and use the preset adjustment parameters to adjust the next initial position to obtain the next target position of the waste gas bypass valve.
[0144] S9. In slow exit mode, when each periodic update time arrives, the first target position determined by the previous periodic update time is adjusted using preset adjustment parameters until the opening value corresponding to the adjusted target position is less than or equal to the initial opening value, and then the slow exit mode of the exhaust bypass valve is exited.
[0145] S10. In slow exit mode, when any periodic update time is reached and any opening value of any initial position determined by any periodic update time is greater than or equal to the second preset value, exit the slow exit mode of the exhaust bypass valve.
[0146] S11. In slow exit mode, when any periodic update time is reached and any opening value of any initial position determined by any periodic update time is less than the first preset value, restart the target control mode of the waste gas bypass valve.
[0147] S12. If the next initial opening value is greater than the second preset value, determine to exit the target control mode of the waste gas bypass valve.
[0148] After completing step S6, proceed to either step S7 or step S12.
[0149] S13. If the initial opening value is greater than the first preset value, the initial position is determined as the target position.
[0150] After completing step S1, proceed to either step S2 or step S13.
[0151] Understandably, the waste gas bypass valve opening position determination device, when determining the initial position corresponding to the first flow rate and the first pressure ratio, and the initial opening value corresponding to this initial position is less than or equal to the first preset value (i.e., when the waste gas bypass valve is close to fully closed or the actual opening change of the waste gas bypass valve is small), obtains the actual boost pressure of the waste gas bypass valve and the current speed of the range extender, and determines a compensation amount based on the initial position, actual boost pressure, and current speed. This compensation amount is then used to compensate for the opening corresponding to the first preset value or for the previously determined target position, thereby reducing the difference between the determined waste gas bypass valve position and the previously determined waste gas bypass valve position. In other words, under the high load condition of the range extender, it avoids fluctuations in the calculated expected position of the waste gas bypass valve, thus preventing the waste gas bypass valve from hitting the limit position and reducing wear on the waste gas bypass valve.
[0152] Based on the same inventive concept as the above-mentioned method for determining the opening position of an exhaust gas bypass valve, this application provides an exhaust gas bypass valve opening position determination device 1, corresponding to an exhaust gas bypass valve opening position determination method. Figure 3 A schematic diagram of the composition structure of an exhaust gas bypass valve opening position determination device provided in this application embodiment. Figure 1 The device 1 for determining the opening position of the waste gas bypass valve may include:
[0153] The determining unit 11 is used to determine the initial position corresponding to the first flow rate and the first pressure ratio; the first flow rate is the flow rate of the waste gas flowing through the waste gas bypass valve; the first pressure ratio is the gas pressure ratio at both ends of the waste gas bypass valve; the initial position is the initially determined opening position of the waste gas bypass valve; and the compensation amount is determined based on the initial position, the actual boost pressure, and the current rotation speed.
[0154] The acquisition unit 12 is used to acquire the actual boost pressure of the exhaust bypass valve and the current speed of the range extender when the initial opening value corresponding to the initial position is less than or equal to a first preset value.
[0155] The compensation unit 13 is used to compensate the first position of the waste gas bypass valve using the compensation amount to obtain the target position of the waste gas bypass valve. The first position includes the first preset value or the previous target position determined last time.
[0156] In some embodiments of this application, the acquisition unit 12 is used to acquire the first boost pressure when the first flow rate is determined;
[0157] The determining unit 11 is used to determine the deviation between the actual boost pressure and the first boost pressure; and to determine the compensation amount corresponding to the deviation and the current speed in a table of correspondence between preset deviation, preset speed and preset compensation amount.
[0158] In some embodiments of this application, the device further includes a start-up unit;
[0159] The starting unit is used to start the target control mode of the waste gas bypass valve when the initial opening value is less than or equal to the first preset value.
[0160] The acquisition unit 12 is used to acquire the actual boost pressure of the exhaust bypass valve and the current speed of the range extender under the target control mode;
[0161] Accordingly, the compensation unit 13 is used to compensate the first preset value using the compensation amount when the target control mode is first started after the waste gas bypass valve is started, so as to obtain the target position of the waste gas bypass valve; and to compensate the previous position information value using the compensation amount to obtain the target position.
[0162] The acquisition unit 12 is used to acquire the previous position information value corresponding to the previous target position of the waste gas bypass valve when the target control mode is not started for the first time after the waste gas bypass valve is started.
[0163] In some embodiments of this application, the device further includes an exit unit and an adjustment unit;
[0164] The determining unit 11 is used to determine the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve when the periodic update time is reached.
[0165] The exit unit is used to exit the target control mode of the waste gas bypass valve when the next initial opening value corresponding to the next initial position is greater than the first preset value and less than the second preset value.
[0166] The starting unit is used to initiate a slow exit mode for the waste gas bypass valve to exit the target control mode.
[0167] The acquisition unit 12 is used to acquire preset adjustment parameters in the slow exit mode;
[0168] The adjustment unit is used to adjust the next initial position using the preset adjustment parameters to obtain the next target position of the waste gas bypass valve.
[0169] In some embodiments of this application, the adjustment unit is used to adjust the first target position determined by the previous periodic update time using the preset adjustment parameters when each periodic update time arrives in the slow exit mode, until the opening value corresponding to the adjusted target position is less than or equal to the initial opening value, and then exit the slow exit mode of the exhaust bypass valve.
[0170] The exit unit is used to exit the slow exit mode of the exhaust gas bypass valve when any periodic update time is reached and any opening value of any initial position determined for any periodic update time is greater than or equal to the second preset value.
[0171] The starting unit is used to restart the target control mode of the waste gas bypass valve when any periodic update time is reached and any opening value of any initial position determined for any periodic update time is less than the first preset value in the slow exit mode.
[0172] In some embodiments of this application, the determining unit 11 is used to determine to exit the target control mode of the waste gas bypass valve when the next initial opening value corresponding to the next initial position is greater than the second preset value.
[0173] In some embodiments of this application, the determining unit 11 is used to determine the initial position as the target position when the initial opening value is greater than the first preset value.
[0174] It should be noted that, in practical applications, the aforementioned determining unit 11, acquiring unit 12, and compensation unit 13 can be implemented by the processor 14 on the waste gas bypass valve opening position determining device, specifically by a CPU (Central Processing Unit), MPU (Microprocessor Unit), DSP (Digital Signal Processor), or Field Programmable Gate Array (FPGA), etc.; the aforementioned data storage can be implemented by the memory 15 on the waste gas bypass valve opening position determining device.
[0175] This application also provides a device for determining the opening position of an exhaust gas bypass valve, such as... Figure 4As shown, the device for determining the opening position of the waste gas bypass valve includes: a processor 14, a memory 15, and a communication bus 16. The memory 15 communicates with the processor 14 through the communication bus 16. The memory 15 stores programs that can be executed by the processor 14. When the program is executed, the processor 14 executes the waste gas bypass valve opening position determination method as described above.
[0176] In practical applications, the aforementioned memory 15 can be volatile memory, such as random-access memory (RAM); or non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); or a combination of the above types of memory, and provide instructions and data to the processor 14.
[0177] This application provides a computer program product, which includes a computer program or computer-executable instructions stored in a computer-readable storage medium. The processor of the waste gas bypass valve opening position determination device reads the computer-executable instructions from the computer-readable storage medium and executes the computer-executable instructions, causing the waste gas bypass valve opening position determination device to perform the waste gas bypass valve opening position determination method described above in this application embodiment.
[0178] This application provides a computer-readable storage medium storing computer-executable instructions. When these computer-executable instructions are executed by a processor, they cause the processor to execute the waste gas bypass valve opening position determination method provided in this application. For example, ... Figure 1 The method for determining the opening position of the waste gas bypass valve is shown.
[0179] In some embodiments, the computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEP ROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or it may be a variety of devices including one or any combination of the above-mentioned memories.
[0180] In some embodiments, computer-executable instructions may take the form of programs, software, software modules, scripts, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as stand-alone programs or as modules, components, subroutines, or other units suitable for use in a computing environment.
[0181] As an example, computer-executable instructions may, but do not necessarily, correspond to files in a file system. They may be stored as part of a file that holds other programs or data, for example, in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple co-located files (e.g., files that store one or more modules, subroutines, or code sections).
[0182] Understandably, the waste gas bypass valve opening position determination device, when determining the initial position corresponding to the first flow rate and the first pressure ratio, and the initial opening value corresponding to this initial position is less than or equal to the first preset value (i.e., when the waste gas bypass valve is close to fully closed or the actual opening change of the waste gas bypass valve is small), obtains the actual boost pressure of the waste gas bypass valve and the current speed of the range extender, and determines a compensation amount based on the initial position, actual boost pressure, and current speed. This compensation amount is then used to compensate for the opening corresponding to the first preset value or for the previously determined target position, thereby reducing the difference between the determined waste gas bypass valve position and the previously determined waste gas bypass valve position. In other words, under the high load condition of the range extender, it avoids fluctuations in the calculated expected position of the waste gas bypass valve, thus preventing the waste gas bypass valve from hitting the limit position and reducing wear on the waste gas bypass valve.
Claims
1. A method for determining the opening position of an exhaust gas bypass valve, characterized in that, The method includes: Determine the initial position corresponding to the first flow rate and the first pressure ratio; the first flow rate is the flow rate of the waste gas flowing through the waste gas bypass valve; the first pressure ratio is the gas pressure ratio at both ends of the waste gas bypass valve; the initial position is the initially determined opening position of the waste gas bypass valve; If the initial opening value corresponding to the initial position is less than or equal to the first preset value, the actual boost pressure of the waste gas bypass valve and the current speed of the range extender are obtained. The compensation amount is determined based on the initial position, the actual boost pressure, and the current rotational speed. The first position of the waste gas bypass valve is compensated using the compensation amount to obtain the target position of the waste gas bypass valve. The first position includes the first preset value or the previous target position determined last time.
2. The method according to claim 1, characterized in that, The step of determining the compensation amount based on the initial position, the actual boost pressure, and the current rotational speed includes: Obtain the first boost pressure when the first flow rate is determined; Determine the deviation between the actual boost pressure and the first boost pressure; In the table of correspondence between preset deviation, preset speed and preset compensation amount, determine the compensation amount corresponding to the deviation and the current speed.
3. The method according to claim 1, characterized in that, When the initial opening value corresponding to the initial position is less than or equal to a first preset value, obtaining the actual boost pressure of the waste gas bypass valve and the current speed of the range extender includes: If the initial opening value is less than or equal to the first preset value, the target control mode for the waste gas bypass valve is activated. In the target control mode, the actual boost pressure of the exhaust bypass valve and the current speed of the range extender are obtained; Accordingly, the step of compensating the first position of the waste gas bypass valve using the compensation amount to obtain the target position of the waste gas bypass valve includes: When the target control mode is activated for the first time after the exhaust gas bypass valve is started, the first preset value is compensated by the compensation amount to obtain the target position of the exhaust gas bypass valve. If the target control mode is not activated for the first time after the exhaust bypass valve is started, the previous position information value corresponding to the previous target position of the exhaust bypass valve is obtained. The target position is obtained by compensating the previous position information value using the compensation amount.
4. The method according to claim 3, characterized in that, After compensating the first position of the waste gas bypass valve using the compensation amount to obtain the target position of the waste gas bypass valve, the method further includes: When the periodic update time is reached, determine the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve; If the next initial opening value corresponding to the next initial position is greater than the first preset value and less than the second preset value, the target control mode of the waste gas bypass valve is exited, and the slow exit mode of the waste gas bypass valve is started. In the slow exit mode, obtain the preset adjustment parameters; The next initial position is adjusted using the preset adjustment parameters to obtain the next target position of the waste gas bypass valve.
5. The method according to claim 4, characterized in that, After adjusting the next initial position using the preset adjustment parameters to obtain the next target position of the waste gas bypass valve, the method further includes: In the slow exit mode, when each periodic update time arrives, the first target position determined by the previous periodic update time is adjusted using the preset adjustment parameters until the opening value corresponding to the adjusted target position is less than or equal to the initial opening value, at which point the slow exit mode of the exhaust bypass valve is exited. In the slow exit mode, when any periodic update time is reached and any opening value of any initial position determined for any periodic update time is greater than or equal to the second preset value, the slow exit mode of the exhaust bypass valve is exited. In the slow exit mode, when any periodic update time is reached and any opening value of any initial position determined for any periodic update time is less than the first preset value, the target control mode of the waste gas bypass valve is restarted.
6. The method according to claim 4, characterized in that, After determining the next initial position corresponding to the next first flow rate and the next first pressure ratio of the waste gas bypass valve when the periodic update time is reached, the method further includes: If the next initial opening value corresponding to the next initial position is greater than the second preset value, it is determined to exit the target control mode of the waste gas bypass valve.
7. The method according to claim 1, characterized in that, After determining the initial position corresponding to the first flow rate and the first pressure ratio, the method further includes: If the initial opening value is greater than the first preset value, the initial position is determined as the target position.
8. A device for determining the opening position of an exhaust gas bypass valve, characterized in that, The device includes: A determining unit is used to determine an initial position corresponding to a first flow rate and a first pressure ratio; the first flow rate is the flow rate of waste gas flowing through the waste gas bypass valve; the first pressure ratio is the gas pressure ratio at both ends of the waste gas bypass valve; the initial position is the initially determined opening position of the waste gas bypass valve; and a compensation amount is determined based on the initial position, the actual boost pressure, and the current rotational speed. The acquisition unit is used to acquire the actual boost pressure of the waste gas bypass valve and the current speed of the range extender when the initial opening value corresponding to the initial position is less than or equal to a first preset value; The compensation unit is used to compensate the first position of the waste gas bypass valve using the compensation amount to obtain the target position of the waste gas bypass valve. The first position includes the first preset value or the previous target position determined last time.
9. A device for determining the opening position of an exhaust gas bypass valve, characterized in that, The device includes: Memory is used to store executable instructions for a computer; A processor, when executing computer-executable instructions stored in the memory, implements the method according to any one of claims 1 to 7.
10. A computer-readable storage medium storing computer-executable instructions, characterized in that, When the computer-executable instructions are executed by a processor, they implement the method described in any one of claims 1 to 7.
11. A computer program product comprising computer-executable instructions or a computer program, characterized in that, When the computer-executable instructions or computer program are executed by a processor, they implement the method according to any one of claims 1 to 7.