Control method, device, equipment, storage medium and product of fuel injector

Abstract

The application discloses a fuel injector control method, device, equipment, storage medium and product, and belongs to the technical field of vehicles. The method comprises the following steps: for each power supply voltage in multiple power supply voltages, the fuel injector is powered by the power supply voltage; in the process of controlling the fuel injector to perform fuel injection operation, test data of multiple sampling points is acquired, the test data of each sampling point comprising a fuel injection pulse width of the fuel injector and an instantaneous fuel consumption value of an engine; based on the test data of the multiple sampling points, a response delay time of the fuel injector under the power supply voltage is determined, and a corresponding relationship between the power supply voltage and the response delay time is obtained; when the fuel injector is controlled, based on the current power supply voltage of the fuel injector, the corresponding response delay time of the current power supply voltage is determined from the corresponding relationship between the power supply voltage and the response delay time; and the fuel injector is controlled based on the corresponding response delay time of the current power supply voltage. The application can improve the control accuracy of the fuel injector.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a control method, device and equipment of an oil injector, a storage medium and a product. BACKGROUND

[0002] The oil injector is an important component in the engine fuel injection system, and its main function is to spray fuel into the airway or cylinder of the engine in the form of atomization to meet the engine combustion demand. With the continuous progress of vehicle technology and the increasingly strict emission control, the fuel injection accuracy of the engine of the vehicle is also increasingly high, and the suppliers of the vehicle are using various means to improve the fuel injection accuracy, so as to improve the utilization efficiency of fuel, reduce the fuel consumption of the vehicle and reduce the pollution of the environment by emissions. SUMMARY

[0003] The embodiments of the present application provide a control method, device and equipment of an oil injector, a storage medium and a product, which can improve the control accuracy of the control of the oil injector. The technical solution is as follows:

[0004] In one aspect, a control method of an oil injector is provided, and the method comprises:

[0005] determining a plurality of power supply voltages, the plurality of power supply voltages being used to supply power to an oil injector of an engine to test a response delay time of the oil injector under the plurality of power supply voltages;

[0006] for each power supply voltage, supplying power to the oil injector by the power supply voltage;

[0007] controlling the oil injector to perform an oil injection operation for a preset time length under the power supply of the power supply voltage;

[0008] acquiring test data of a plurality of sampling points in the process of performing the oil injection operation, the test data of each sampling point comprising an oil injection pulse width of the oil injector and an instantaneous fuel consumption value of the engine;

[0009] determining the response delay time of the oil injector under the power supply voltage based on the test data of the plurality of sampling points;

[0010] determining a corresponding relationship between the power supply voltage and the response delay time based on the response delay time of the oil injector under the power supply voltage;

[0011] when the oil injector is controlled, acquiring a current power supply voltage of the oil injector;

[0012] determining a response delay time corresponding to the current power supply voltage from the corresponding relationship between the power supply voltage and the response delay time based on the current power supply voltage;

[0013] The fuel injector is controlled based on the response delay time corresponding to the current power supply voltage.

[0014] In one possible implementation, determining the response delay time of the injector under the supply voltage based on the test data of the multiple sampling points includes:

[0015] Determining first relationship data between instantaneous fuel consumption and injection pulse width based on the test data of the plurality of sampling points;

[0016] Determine a vertical intercept of the first relationship data, and use the vertical intercept as a response delay time of the injector under the supply voltage.

[0017] In another possible implementation, determining the response delay time of the injector under the supply voltage based on the test data of the multiple sampling points includes:

[0018] determining, based on the test data of the plurality of sampling points, a response delay time of the injector at each of a plurality of speeds and a response of the injector under the supply voltage when the speed of the engine is each of a plurality of speeds;

[0019] Based on the engine speed being each of a plurality of speeds and the response delay time of the injector under the supply voltage, an average response time of the injector under the supply voltage is determined to obtain the response delay time of the injector under the test voltage.

[0020] In another possible implementation, determining, based on the current supply voltage, the response delay time corresponding to the current supply voltage from a correspondence between the supply voltage and the response delay time includes:

[0021] If, based on the current supply voltage, no response delay time corresponding to the current supply voltage is found from the correspondence between supply voltages and response delay times, obtaining a supply voltage closest to the current supply voltage from the correspondence between supply voltages and response delay times;

[0022] Obtaining the response delay time corresponding to the closest supply voltage from the corresponding relationship between the supply voltage and the response delay time;

[0023] The response delay time corresponding to the closest power supply voltage is corrected to obtain the response delay time corresponding to the current power supply voltage.

[0024] In another possible implementation, determining, based on the current supply voltage, the response delay time corresponding to the current supply voltage from a correspondence between the supply voltage and the response delay time includes:

[0025] In a case where the current power supply voltage does not correspond to a response delay time in the correspondence between the power supply voltage and the response delay time based on the current power supply voltage, the second relationship data between the power supply voltage and the response delay time is obtained by fitting the power supply voltage and the response delay time based on the correspondence between the power supply voltage and the response delay time.

[0026] The response delay time corresponding to the current power supply voltage is determined based on the current power supply voltage and the second relationship data.

[0027] In another possible implementation, the determining of the correspondence between the power supply voltage and the response delay time based on the response delay time of the fuel injector under the power supply voltage comprises:

[0028] The speed of the engine is determined.

[0029] The correspondence between the speed of the engine, the power supply voltage and the response delay time is determined based on the speed of the engine, the power supply voltage and the response delay time.

[0030] The determining of the response delay time corresponding to the current power supply voltage from the correspondence between the power supply voltage and the response delay time based on the current power supply voltage comprises:

[0031] The response delay time corresponding to the speed of the engine and the current power supply voltage is determined from the correspondence between the speed of the engine, the power supply voltage and the response delay time based on the speed of the engine and the current power supply voltage.

[0032] On the other hand, a control device of a fuel injector is provided, and the device comprises:

[0033] A first determining module is configured to determine a plurality of power supply voltages for supplying power to a fuel injector of an engine to test a response delay time of the fuel injector under the plurality of power supply voltages.

[0034] A power supply module is configured to supply power to the fuel injector by each power supply voltage.

[0035] A fuel injection module is configured to control the fuel injector to perform a fuel injection operation for a preset time length under the power supply voltage.

[0036] A first obtaining module is configured to obtain test data of a plurality of sampling points in the process of performing the fuel injection operation, and each test data of the sampling points comprises a fuel injection pulse width of the fuel injector and an instantaneous fuel consumption value of the engine.

[0037] determine the response delay time of the fuel injector under the supply voltage based on the test data of the plurality of sampling points;

[0038] determine the corresponding relationship between the supply voltage and the response delay time based on the response delay time of the fuel injector under the supply voltage;

[0039] obtain the current supply voltage of the fuel injector when the fuel injector is controlled;

[0040] determine the response delay time corresponding to the current supply voltage from the corresponding relationship between the supply voltage and the response delay time based on the current supply voltage;

[0041] control the fuel injector based on the response delay time corresponding to the current supply voltage.

[0042] In a possible implementation, the second determining module is configured to determine first relationship data between the instantaneous fuel consumption value and the fuel injection pulse width based on the test data of the plurality of sampling points; and determine the vertical intercept of the first relationship data, and take the vertical intercept as the response delay time of the fuel injector under the supply voltage.

[0043] In another possible implementation, the second determining module is configured to determine the response delay time of the fuel injector under the supply voltage when the speed of the engine is each of a plurality of speeds based on the test data of the plurality of sampling points; and determine the average response time of the fuel injector under the supply voltage based on the response delay time of the fuel injector under the supply voltage when the speed of the engine is each of a plurality of speeds, to obtain the response delay time of the fuel injector under the test voltage.

[0044] In another possible implementation, the fourth determining module is configured to, in a case where the response delay time corresponding to the current supply voltage is not queried from the corresponding relationship between the supply voltage and the response delay time based on the current supply voltage, obtain the supply voltage closest to the current supply voltage from the corresponding relationship between the supply voltage and the response delay time; obtain the response delay time corresponding to the closest supply voltage from the corresponding relationship between the supply voltage and the response delay time; and correct the response delay time corresponding to the closest supply voltage to obtain the response delay time corresponding to the current supply voltage.

[0045] In another possible implementation, the fourth determination module is used to, when, based on the current supply voltage, no response delay time corresponding to the current supply voltage is found from the correspondence between the supply voltage and the response delay time, fit the supply voltage and the response delay time based on the correspondence between the supply voltage and the response delay time to obtain second relationship data between the supply voltage and the response delay time; and determine the response delay time corresponding to the current supply voltage based on the current supply voltage and the second relationship data.

[0046] In another possible implementation, the third determining module is configured to determine the engine speed; and determine a correspondence between the engine speed, the power supply voltage, and the response delay time based on the engine speed, the power supply voltage, and the response delay time;

[0047] The fourth determination module is used to determine the response delay time corresponding to the engine speed and the current power supply voltage from the corresponding relationship between the engine speed, the power supply voltage and the response delay time based on the engine speed and the current power supply voltage.

[0048] On the other hand, a vehicle control device is provided, which includes a processor and a memory, wherein the memory stores at least one program code, and the at least one program code is loaded and executed by the processor to implement the above-mentioned injector control method.

[0049] On the other hand, a computer-readable storage medium is provided, wherein at least one program code is stored in the storage medium, and the at least one program code is loaded and executed by a processor to implement the above-mentioned method for controlling the fuel injector.

[0050] On the other hand, a computer program product is provided. The product stores at least one program code, and the at least one program code is used to be executed by a processor to implement the above-mentioned injector control method.

[0051] In the embodiment of the present application, since the correspondence between the power supply voltage and the response delay time is calibrated in the calibration stage, the response delay time of the injector under different power supply voltages is known in advance; therefore, when controlling the injector, the response delay time of the injector under the current power supply voltage can be obtained based on the current power supply voltage of the injector. Since the accurate response delay time is obtained, the injector can be controlled based on the response delay time, which can improve the control accuracy of the injector.

[0052] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic diagram of an implementation environment of a method for controlling a fuel injector according to an exemplary embodiment of the present application;

[0054] Figure 2 is a flow chart of a method for controlling a fuel injector shown in an exemplary embodiment of the present application;

[0055] Figure 3 is a schematic diagram of a method for controlling a fuel injector according to an exemplary embodiment of the present application;

[0056] Figure 4 is a flow chart of a method for controlling a fuel injector shown in an exemplary embodiment of the present application;

[0057] Figure 5 This is a relationship diagram of the injection pulse width and the instantaneous fuel consumption of the engine at supply voltages of 7 volts, 8 volts, 10 volts, 12 volts, and 14 volts, respectively, when the engine speed is 2000 rpm according to an exemplary embodiment of the present application;

[0058] Figure 6 This is a relationship diagram of the injection pulse width and the instantaneous fuel consumption of the engine at supply voltages of 7 volts, 8 volts, 10 volts, 12 volts, and 14 volts, respectively, when the engine speed is 2500 rpm according to an exemplary embodiment of the present application;

[0059] Figure 7 is a schematic diagram showing the corresponding relationship between the supply voltage and the response delay time according to an exemplary embodiment of the present application;

[0060] Figure 8 is a flow chart of a method for controlling a fuel injector shown in an exemplary embodiment of the present application;

[0061] Figure 9 is a block diagram of a control device for a fuel injector shown in an exemplary embodiment of the present application;

[0062] Figure 10 It is a block diagram of a vehicle control device showing an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to make the technical solutions and advantages of the present application clearer, the implementation methods of the present application are described in further detail below.

[0064] The terms "first," "second," "third," and "fourth," etc. in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0065] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, storage, display, etc.), and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the power supply voltage and test data involved in this application were obtained with full authorization.

[0066] Please refer to Figure 1 , which shows a schematic diagram of an implementation environment for an injector control method according to an exemplary embodiment of the present application. This implementation environment includes a vehicle control device 10 and a vehicle 20; vehicle 20 is provided with an engine 201 and an injector 202. Engine 201 is used to provide power to vehicle 20, and injector 202 is used to supply fuel to engine 201. Vehicle control device 10 is used to control injector 202 to improve fuel utilization efficiency, thereby reducing vehicle 20's fuel consumption and reducing environmental pollution caused by emissions. Vehicle 20 is a fuel-powered vehicle or a hybrid vehicle, without specific limitation.

[0067] Please refer to Figure 2 , which shows a flow chart of a method for controlling a fuel injector according to an exemplary embodiment of the present application. Figure 2 , the method comprising:

[0068] Step 201: Determine a plurality of supply voltages, where the plurality of supply voltages are used to power a fuel injector of an engine, so as to test a response delay time of the fuel injector under the plurality of supply voltages.

[0069] The first implementation method: the engine's injector is often powered by a battery, and the battery voltage is often within a range, and the multiple supply voltages are multiple voltages within the supply voltage range of the virtual battery; accordingly, the steps of determining the multiple supply voltages can be: determining the supply voltage range of the battery, and determining multiple supply voltages within the supply voltage range of the battery.

[0070] In one possible implementation, the step of determining multiple supply voltages within the supply voltage range of the battery may be: sampling integer voltage values ​​within the supply voltage range of the battery to obtain multiple supply voltages; for example, if the supply voltage range of the battery is 7 volts-14 volts, then sampling integer voltage values ​​within the supply voltage range of the battery to obtain multiple supply voltages of 7 volts, 8 volts, 9 volts, 10 volts, 11 volts, 12 volts, 13 volts, and 14 volts.

[0071] In another possible implementation, the step of determining multiple supply voltages within the battery supply voltage range may include: sampling within the battery supply voltage range to obtain multiple sampled voltages, determining the multiple sampled voltages as a power supply frequency for powering the injector, and, based on the multiple sampled voltages as the power supply frequency for powering the injector, determining from the multiple sampled voltages a sampled voltage having a power supply frequency higher than a first preset frequency as the supply voltage. For example, the multiple determined supply voltages may be 7 volts, 8 volts, 10 volts, 12 volts, and 14 volts. In this embodiment of the present application, selecting the sampled voltage with a higher power supply frequency as the supply voltage based on the power supply frequency for powering the injector can improve the accuracy of the supply voltage determination.

[0072] In a second implementation, the multiple supply voltages may be historical supply voltages of the injector. Accordingly, the step of determining the multiple supply voltages may include determining multiple historical supply voltages of the engine injector and determining the multiple supply voltages from the multiple historical supply voltages. For example, the multiple historical supply voltages may be used as the multiple supply voltages. In another example, a historical supply voltage having a supply frequency greater than a second preset frequency may be determined from the multiple historical supply voltages as the supply voltage.

[0073] The third implementation method: The power supply voltage of the injector of the engine of different vehicles may be different. Therefore, when determining multiple power supply voltages, refer to the vehicle model; accordingly, the steps of determining multiple power supply voltages can be: determine the vehicle model of the current vehicle, and based on the vehicle model of the current vehicle, obtain multiple power supply voltages corresponding to the vehicle model.

[0074] In an embodiment of the present application, the supply voltages of the injectors of the engines of different vehicles may be different; therefore, when determining multiple supply voltages, reference is made to the vehicle model, so that the multiple supply voltages determined are adapted to the current vehicle, thereby improving the accuracy of determining the multiple supply voltages.

[0075] Step 202: For each supply voltage, power the injector via the supply voltage.

[0076] The embodiment of the present application is to calibrate the correspondence between the supply voltage of the injector and the response delay time; therefore, the response delay time of the injector is set to 0 before calibration; then the power supply line of the injector is separately led out and connected to a stable power supply, and the supply voltage of the injector is adjusted by adjusting the output voltage of the stable power supply, and then the response delay time of the injector under multiple power supply voltages is determined through steps 203-206. For example, the multiple power supply voltages are 7 volts, 8 volts, 10 volts, 12 volts and 14 volts respectively; then the output voltage of the stable power supply is adjusted to 7 volts, and the injector is powered by the 7 volt voltage, and then steps 203-206 are executed to determine the response delay time corresponding to the 7 volt supply voltage; then the output voltage of the stable power supply is adjusted to 8 volts, and the injector is powered by the 8 volt voltage, and then steps 203-206 are executed to determine the response delay time corresponding to the 8 volt supply voltage; then the output voltage of the stable power supply is adjusted to 10 volts, and the 10 The fuel injector is powered by a 10-volt voltage, and then steps 203-206 are executed to determine the response delay time corresponding to the 10-volt supply voltage; the output voltage of the stable power supply is then adjusted to 12 volts, the fuel injector is powered by the 12-volt voltage, and then steps 203-206 are executed to determine the response delay time corresponding to the 12-volt supply voltage; the output voltage of the stable power supply is then adjusted to 14 volts, the fuel injector is powered by the 14-volt voltage, and then steps 203-206 are executed to determine the response delay time corresponding to the 14-volt supply voltage.

[0077] For example, see Figure 3 The supply voltage of the injector is SSUB_UbStd_b, and the injector is powered by SSUB_UbStd_b. At this time, the initial response delay time of the injector is Fl2Ti_tdInjUb_CUR, and Fl2Ti_tdInjUb_CUR is set to 0. Then, the response delay time Fl2Ti_tdInjUb of the injector under multiple supply voltages is determined.

[0078] Step 203: Control the fuel injector to perform a fuel injection operation for a preset time period under the power supply voltage.

[0079] The engine's throttle opening is adjusted to change the injection pulse width, so that the injection pulse width increases from a small value to a uniform distribution. Simultaneously, the injector fuel injection amount and ignition angle are adjusted to achieve optimal engine combustion and a preset air-fuel ratio. The preset value can be 1, meaning the air-fuel ratio is 1. After combustion stabilizes, multiple sampling points are determined by dotting. The preset duration can be set and modified as needed and is not specifically limited in this embodiment of the application. For example, the preset duration can be 30 seconds.

[0080] Throttle opening refers to the angle at which the engine throttle valve opens. It's controlled by the driver using the accelerator pedal to vary the amount of air entering the engine, thereby controlling engine operation. Injection pulse width refers to the duration of each injection controlled by the vehicle's control system and is the primary indicator of proper engine injector operation.

[0081] The injection rate is the amount of fuel injected by the injector at one time, and is determined by the engine's intake air volume and engine speed. The ignition angle refers to the angle of crankshaft rotation from the moment of ignition until the piston reaches compression top dead center.

[0082] Step 204: During the fuel injection operation, test data of multiple sampling points are obtained. The test data of each sampling point includes the injection pulse width of the injector and the instantaneous fuel consumption value of the engine.

[0083] Each time a sampling point is marked, the injection pulse width of the injector corresponding to the sampling point and the instantaneous fuel consumption value of the engine are obtained, until multiple sampling points are marked, and the injection pulse width of the injector corresponding to multiple sampling points and the instantaneous fuel consumption value of the engine are obtained.

[0084] Step 205: Determine the response delay time of the injector under the supply voltage based on the test data of the multiple sampling points.

[0085] Based on the test data of multiple sampling points, first relationship data between the instantaneous fuel consumption value and the injection pulse width is determined; the vertical intercept of the first relationship data is determined, and the vertical intercept is used as the response delay time of the injector under the power supply voltage.

[0086] The first relationship data between instantaneous fuel consumption and injection pulse width is used to represent the relationship between the instantaneous fuel consumption and the injection pulse width. The dependent variable of this first relationship data is the injection pulse width, and the independent variable is the instantaneous fuel consumption. Based on test data from multiple sampling points, the instantaneous fuel consumption and injection pulse width are fitted to obtain the first relationship data between the instantaneous fuel consumption and injection pulse width. For example, the first relationship data is y = ax + b, where y is the injection pulse width, x is the instantaneous fuel consumption, and b is the vertical intercept of this first relationship data.

[0087] Step 206: Determine a corresponding relationship between the supply voltage and the response delay time based on the response delay time of the injector under the supply voltage.

[0088] For each of the plurality of supply voltages, the response delay time corresponding to the supply voltage is determined through the above steps 203-205. Since there are a plurality of supply voltages, a plurality of response delay times corresponding to the plurality of supply voltages are determined; for example, the plurality of supply voltages are 7 volts, 8 volts, 10 volts, 12 volts and 14 volts, and the response delay times corresponding to the 7 volts, 8 volts, 10 volts, 12 volts and 14 volts are 2.613, 1.649, 1.036, 0.574 and 0.400 respectively. After determining the plurality of supply voltages and the response delay times corresponding to the plurality of supply voltages, the plurality of supply voltages and the response delay times corresponding to the plurality of supply voltages are stored in the corresponding relationship between the supply voltage and the response delay time.

[0089] In a possible implementation, the determination model of the response delay time is obtained by training a model based on the corresponding relationship between the supply voltage and the response delay time, and the determination model of the response delay time is used to subsequently determine the response delay time corresponding to the current supply voltage of the fuel injector. The step of obtaining the determination model of the response delay time by training a model based on the corresponding relationship between the supply voltage and the response delay time can be: determining a plurality of positive sample data based on the corresponding relationship between the supply voltage and the response delay time, the positive sample data including the calibrated supply voltage and the response delay time, determining a plurality of negative sample data, the negative sample data including random supply voltage and response delay time, performing iterative training of the model based on the plurality of positive sample data and the plurality of negative sample data, and until the training is completed to obtain the determination model of the response delay time.

[0090] It should be noted that steps 201-206 are a calibration process of the corresponding relationship between the supply voltage and the response delay time, and the calibration process only needs to be performed once, and subsequent control of the fuel injector is directly based on steps 207-209.

[0091] In another possible implementation, after the correspondence between the supply voltage and the response delay time is calibrated, the correspondence is stored locally, and the fuel injector is controlled directly based on the correspondence from the local storage in the future. Alternatively, after the correspondence between the supply voltage and the response delay time is calibrated, the correspondence is sent to a cloud server, and the correspondence is shared by the cloud server to other vehicles, so that the other vehicles do not need to perform the above calibration process, and the fuel injector is controlled directly based on the calibrated correspondence. Alternatively, after the correspondence between the supply voltage and the response delay time is calibrated, the correspondence is sent to a mobile phone corresponding to the vehicle, so that the mobile phone shares the correspondence with friends of the user. Alternatively, after the correspondence between the supply voltage and the response delay time is calibrated, the Bluetooth device of the vehicle is turned on, the Bluetooth transmission channel is established between the Bluetooth device of the vehicle and the Bluetooth device of the surrounding vehicle, and the correspondence is shared with the surrounding vehicle through the Bluetooth transmission channel.

[0092] The process of establishing the Bluetooth transmission channel between the Bluetooth device of the vehicle and the Bluetooth device of the surrounding vehicle and sharing the correspondence with the surrounding vehicle through the Bluetooth transmission channel can include: determining the vehicle model of the surrounding vehicle through the Bluetooth transmission channel; in a case where the vehicle model of the vehicle is the same as the vehicle model of the surrounding vehicle, sharing the correspondence with the surrounding vehicle through the Bluetooth transmission channel; and in a case where the vehicle model of the vehicle is not the same as the vehicle model of the surrounding vehicle, not performing the sharing operation.

[0093] Step 207: When the fuel injector is controlled, the current supply voltage of the fuel injector is obtained.

[0094] Since the fuel injector is powered by the battery, the output voltage of the battery is determined in this step, and the output voltage of the battery is the current supply voltage of the fuel injector.

[0095] Step 208: Based on the current supply voltage, the response delay time corresponding to the current supply voltage is determined from the correspondence between the supply voltage and the response delay time.

[0096] The first implementation manner is as follows: based on the current power supply voltage, the response delay time corresponding to the current power supply voltage is searched from the correspondence between the power supply voltage and the response delay time; in the case that the response delay time corresponding to the current power supply voltage is searched from the correspondence between the power supply voltage and the response delay time, the searched response delay time is acquired; in the case that the current power supply voltage is not searched from the correspondence between the power supply voltage and the response delay time, the power supply voltage closest to the current power supply voltage is acquired from the correspondence between the power supply voltage and the response delay time; the response delay time corresponding to the closest power supply voltage is acquired from the correspondence between the power supply voltage and the response delay time; and the response delay time corresponding to the closest power supply voltage is corrected to obtain the response delay time corresponding to the current power supply voltage.

[0097] The response delay time is corrected by increasing or decreasing the response delay time corresponding to the closest power supply voltage by a preset time length; and correspondingly, the step of correcting the response delay time corresponding to the closest power supply voltage to obtain the response delay time corresponding to the current power supply voltage can be as follows: in the case that the current power supply voltage is greater than the closest power supply voltage, a first preset time length is decreased from the response delay time corresponding to the closest power supply voltage to obtain the response delay time corresponding to the current power supply voltage; and in the case that the current power supply voltage is less than the closest power supply voltage, a second preset time length is increased from the response delay time corresponding to the closest power supply voltage to obtain the response delay time corresponding to the current power supply voltage.

[0098] The first preset time length and the second preset time length can be set and changed as needed, and in the embodiments of the present application, the first preset time length and the second preset time length are not specifically limited.

[0099] The second implementation manner is as follows: the response delay time corresponding to the current power supply voltage is determined by the response delay times corresponding to two power supply voltages adjacent to the current power supply voltage; and correspondingly, in the case that the response delay time corresponding to the current power supply voltage is not searched from the correspondence between the power supply voltage and the response delay time based on the current power supply voltage, the response delay times corresponding to two power supply voltages adjacent to the current power supply voltage are acquired from the correspondence between the power supply voltage and the response delay time, and the average of the response delay times corresponding to the two adjacent power supply voltages is determined to obtain the response delay time corresponding to the current power supply voltage.

[0100] In a third implementation manner, in a case where the current power supply voltage does not correspond to the response delay time in the correspondence between the power supply voltage and the response delay time, the second relationship data between the power supply voltage and the response delay time is obtained by fitting the power supply voltage and the response delay time based on the correspondence between the power supply voltage and the response delay time; and the response delay time corresponding to the current power supply voltage is determined based on the current power supply voltage and the second relationship data.

[0101] The second relationship data between the power supply voltage and the response delay time is used to represent the correspondence between the power supply voltage and the response delay time; and the dependent variable of the second relationship data is the response delay time, and the independent variable is the power supply voltage; the independent variable is set as the current power supply voltage, and the dependent variable determined based on the second relationship data is the response delay time corresponding to the current power supply voltage.

[0102] In the embodiments of the present application, in a case where the response delay time corresponding to the current power supply voltage is queried in the correspondence between the power supply voltage and the response delay time, the response delay time in the correspondence is used as a reference, thereby improving the accuracy of the determined response delay time; in a case where the response delay time corresponding to the current power supply voltage cannot be queried in the correspondence between the power supply voltage and the response delay time, the response delay time is determined based on the second relationship data obtained by fitting, and the second relationship data is determined based on the power supply voltage and the response delay time in the correspondence; therefore, the second relationship data is also relatively accurate, and the response delay time corresponding to the current power supply voltage determined based on the second relationship data is also relatively accurate.

[0103] Step 209: controlling the fuel injector based on the response delay time corresponding to the current power supply voltage.

[0104] The response delay time corresponding to the current power supply voltage is accumulated as a revision time on the fuel injection pulse width, thereby achieving the control of the fuel injector.

[0105] In the embodiments of the present application, in the calibration phase, the correspondence between the power supply voltage and the response delay time is calibrated, that is, the response delay time of the fuel injector under different power supply voltages is obtained in advance; therefore, when the fuel injector is controlled, the response delay time of the fuel injector under the current power supply voltage can be obtained based on the current power supply voltage of the fuel injector; since the accurate response delay time is obtained, the control precision of the fuel injector is improved based on the response delay time.

[0106] Please refer to Figure 4 which shows a flowchart of a control method of a fuel injector according to an example embodiment of the present application. Please refer to Figure 4 The method comprises the following steps.

[0107] Step 401: The vehicle control device determines multiple supply voltages and multiple speeds, where the multiple supply voltages are used to power an injector of an engine to test a response delay time of the injector under the multiple supply voltages when the engine speed is multiple speeds.

[0108] The multiple speeds can be engine speeds when the vehicle speed is higher than a preset speed; for example, the multiple speeds can be 2000 and 2500. Because a vehicle often accelerates first, then travels at high speed, and then decelerates to a stop, and high-speed travel takes a long time, the engine speed during high-speed travel is determined and calibrated, thereby improving the accuracy of the calibrated response delay time. In some embodiments, the process for the vehicle control device to determine the multiple supply voltages is the same as step 201 and will not be repeated here.

[0109] Step 402: For each supply voltage and each speed, the vehicle control device controls the speed of the engine to the speed, and supplies power to the injector through the supply voltage.

[0110] The embodiment of the application is to calibrate the corresponding relationship between the supply voltage of the fuel injector and the response delay time; therefore, the response delay time of the fuel injector is set to 0 before calibration; then the supply line of the fuel injector is separately connected to the stable power supply, the output voltage of the stable power supply is adjusted to adjust the supply voltage of the fuel injector, and the engine speed is adjusted to one of the multiple speeds, and then the response delay time of the fuel injector under the supply of the multiple supply voltages is determined through steps 403-407. For example, the multiple supply voltages are 7 volts, 8 volts, 10 volts, 12 volts and 14 volts, and the multiple speeds are 2000 and 2500; the engine speed is adjusted to 2000, the output voltage of the stable power supply is adjusted to 7 volts, the fuel injector is supplied with 7-volt voltage, and then steps 403-407 are executed to determine the response delay time corresponding to the supply voltage of 7 volts when the engine speed is 2000; then the output voltage of the stable power supply is adjusted to 8 volts, the fuel injector is supplied with 8-volt voltage, and then steps 403-407 are executed to determine the response delay time corresponding to the supply voltage of 8 volts when the engine speed is 2000; then the output voltage of the stable power supply is adjusted to 10 volts, the fuel injector is supplied with 10-volt voltage, and then steps 403-407 are executed to determine the response delay time corresponding to the supply voltage of 10 volts when the engine speed is 2000; then the output voltage of the stable power supply is adjusted to 12 volts, the fuel injector is supplied with 12-volt voltage, and then steps 403-407 are executed to determine the response delay time corresponding to the supply voltage of 12 volts when the engine speed is 2000; then the output voltage of the stable power supply is adjusted to 14 volts, the fuel injector is supplied with 14-volt voltage, and then steps 403-407 are executed to determine the response delay time corresponding to the supply voltage of 14 volts when the engine speed is 2000.Then adjust the engine speed to 2500 and the output voltage of the stable power supply to 7 volts, and power the injector with 7 volts, and then execute steps 403-407 to determine the engine speed is 2500 and the response delay time corresponding to the 7 volt power supply voltage; then adjust the output voltage of the stable power supply to 8 volts, and power the injector with 8 volts, and then execute steps 403-407 to determine the engine speed is 2500 and the response delay time corresponding to the 8 volt power supply voltage; then adjust the output voltage of the stable power supply to 10 volts, and power the injector with 10 volts, and then execute Steps 403-407 are performed to determine that the engine speed is 2500 and the response delay time corresponding to the power supply voltage of 10 volts; then the output voltage of the stable power supply is adjusted to 12 volts, and the injector is powered by the 12 volt voltage, and then steps 403-407 are performed to determine that the engine speed is 2500 and the response delay time corresponding to the power supply voltage of 12 volts; then the output voltage of the stable power supply is adjusted to 14 volts, and the injector is powered by the 14 volt voltage, and then steps 403-407 are performed to determine that the engine speed is 2500 and the response delay time corresponding to the power supply voltage of 14 volts.

[0111] Step 403: The vehicle control device controls the fuel injector to perform a fuel injection operation for a preset time period under power supply voltage.

[0112] In some embodiments, this step is the same as step 203 and will not be repeated here.

[0113] Step 404: During the fuel injection operation, the vehicle control device obtains test data of multiple sampling points. The test data of each sampling point includes the injection pulse width of the injector and the instantaneous fuel consumption value of the engine.

[0114] For example, see Figure 5 , when the engine speed is 2000, the relationship between the injection pulse width and the instantaneous fuel consumption value of the engine at the supply voltage of 7V, 8V, 10V, 12V and 14V is shown in the figure. In this relationship diagram, the horizontal axis is the instantaneous fuel consumption value of the engine and the vertical axis is the injection pulse width. Please refer to Figure 6 , when the engine speed is 2500, the relationship diagram of the injection pulse width and the instantaneous fuel consumption value of the engine under the supply voltage of 7V, 8V, 10V, 12V and 14V respectively. In this relationship diagram, the horizontal axis is the instantaneous fuel consumption value of the engine and the vertical axis is the injection pulse width.

[0115] Step 405: The vehicle control device determines, based on the test data of the multiple sampling points, a response delay time of the injector at each of the multiple speeds and the supply voltage when the engine speed is at the multiple speeds.

[0116] For example, the plurality of rotational speeds are 2000 and 2500 respectively, and the plurality of supply voltages are 7 volts, 8 volts, 10 volts, 12 volts and 14 volts respectively. The vehicle control device obtains the response delay time of the fuel injector under the supply voltage of 7 volts, 8 volts, 10 volts, 12 volts and 14 volts respectively when the rotational speed of the engine is 2000.

[0117] Step 406: The vehicle control device determines the average response time of the fuel injector under the supply voltage based on the response delay time of the fuel injector under each rotational speed of the plurality of rotational speeds and the supply voltage, and obtains the response delay time of the fuel injector under the test voltage.

[0118] The vehicle control device determines the first relationship data between the instantaneous fuel consumption value and the fuel injection pulse width based on the test data of the plurality of sampling points, determines the vertical intercept of the first relationship data, and takes the vertical intercept as the response delay time of the fuel injector under the supply voltage. For example, please continue to refer to Figure 5 and Figure 6When the engine speed is 2000 rpm and the injector supply voltage is 7 volts, the first relational data is y = 0.3061x + 2.9269, and the response delay time is 2.9269. When the engine speed is 2000 rpm and the injector supply voltage is 8 volts, the first relational data is y = 0.3389x + 1.7503, and the response delay time is 1.7503. When the engine speed is 2000 rpm and the injector supply voltage is 10 volts, the first relational data is y = 0.3414x + 1.128, and the response delay time is 1.128. When the engine speed is 2000 rpm and the injector supply voltage is 12 volts, the first relational data is y = 0.3505x + 0.5149, and the response delay time is 0.5149. When the engine speed is 2000 rpm and the injector supply voltage is 14 volts, the first relationship data is y = 0.3409x + 0.4453, and the response delay time is 0.4453. When the engine speed is 2500 rpm and the injector supply voltage is 7 volts, the first relationship data is y = 0.3376x + 2.3909, and the response delay time is 2.3909. When the engine speed is 2500 rpm and the injector supply voltage is 8 volts, the first relationship data is y = 0.3392x + 1.6556, and the response delay time is 1.6556. When the engine speed is 2500 rpm and the injector supply voltage is 10 volts, the first relationship data is y = 0.3355x + 1.0205, and the response delay time is 1.0205. When the engine speed is 2500 rpm and the injector supply voltage is 12 volts, the first relationship data is y = 0.3334x + 0.7145, and the response delay time is 0.7145. When the engine speed is 2500 rpm and the injector supply voltage is 14 volts, the first relationship data is y = 0.343x + 0.395, and the response delay time is 0.395.

[0119] For example, see Figure 7For the case that the supply voltage of the fuel injector is 7 volts, the vehicle control device determines the average response delay time of the engine at the speeds of 2000 and 2500, respectively, which is the response delay time corresponding to the supply voltage of 7 volts, for example, the response delay time is 2.613; for the case that the supply voltage of the fuel injector is 8 volts, the vehicle control device determines the average response delay time of the engine at the speeds of 2000 and 2500, respectively, which is the response delay time corresponding to the supply voltage of 8 volts, for example, the response delay time is 1.649; for the case that the supply voltage of the fuel injector is 10 volts, the vehicle control device determines the average response delay time of the engine at the speeds of 2000 and 2500, respectively, which is the response delay time corresponding to the supply voltage of 10 volts, for example, the response delay time is 1.036; for the case that the supply voltage of the fuel injector is 23 volts, the vehicle control device determines the average response delay time of the engine at the speeds of 2000 and 2500, respectively, which is the response delay time corresponding to the supply voltage of 23 volts, for example, the response delay time is 0.574; for the case that the supply voltage of the fuel injector is 14 volts, the vehicle control device determines the average response delay time of the engine at the speeds of 2000 and 2500, respectively, which is the response delay time corresponding to the supply voltage of 14 volts, for example, the response delay time is 0.400.

[0120] Step 407: The vehicle control device determines the correspondence between the supply voltage and the response delay time based on the response delay time of the fuel injector at the supply voltage.

[0121] In some embodiments, this step is the same as step 207, which will not be repeated here.

[0122] Step 408: When controlling the fuel injector, the vehicle control device obtains the current supply voltage of the fuel injector.

[0123] In some embodiments, this step is the same as step 207, which will not be repeated here.

[0124] Step 409: The vehicle control device determines the response delay time corresponding to the current supply voltage from the correspondence between the supply voltage and the response delay time based on the current supply voltage.

[0125] In some embodiments, this step is the same as step 208, which will not be repeated here.

[0126] Step 410: The vehicle control device controls the fuel injector based on the response delay time corresponding to the current supply voltage.

[0127] In some embodiments, this step is the same as step 209, which will not be repeated here.

[0128] In the embodiment of the present application, since the average response time of the fuel injector under the condition that the rotation speed of the engine is the plurality of rotation speeds is obtained in the calibration stage, the accuracy of the corresponding relationship between the calibrated supply voltage and the response delay time is improved. Therefore, when the fuel injector is controlled, the corresponding response delay time can be accurately determined from the corresponding relationship between the calibrated supply voltage and the response delay time based on the current supply voltage of the fuel injector, so that the accuracy of the determined response delay time is improved, and the control precision of the fuel injector based on the response delay time is improved.

[0129] Please refer to Figure 8 which shows a flowchart of a control method of a fuel injector according to an example embodiment of the present application. Please refer to Figure 8 The method comprises the following steps.

[0130] Step 801: The vehicle control device determines a plurality of supply voltages and a plurality of rotation speeds, the plurality of supply voltages are used to supply power to the fuel injector of the engine, and the response delay time of the fuel injector under the condition that the rotation speed of the engine is the plurality of rotation speeds is tested.

[0131] In some embodiments, this step is the same as step 401, and will not be repeated here.

[0132] Step 802: For each supply voltage and each rotation speed, the vehicle control device controls the rotation speed of the engine to be the rotation speed, and supplies power to the fuel injector by the supply voltage.

[0133] In some embodiments, this step is the same as step 402, and will not be repeated here.

[0134] Step 803: The vehicle control device controls the fuel injector to perform a preset time length of fuel injection operation under the supply voltage.

[0135] In some embodiments, this step is the same as step 403, and will not be repeated here.

[0136] Step 804: In the process of performing the fuel injection operation, the vehicle control device obtains test data of a plurality of sampling points, and the test data of each sampling point comprises the fuel injection pulse width of the fuel injector and the instantaneous fuel consumption value of the engine.

[0137] In some embodiments, this step is the same as step 404, and will not be repeated here.

[0138] Step 805: The vehicle control device determines the response delay time of the fuel injector under the condition that the rotation speed of the engine is each rotation speed of the plurality of rotation speeds and the supply voltage based on the test data of the plurality of sampling points.

[0139] In some embodiments, this step is the same as step 405, and will not be repeated here.

[0140] Step 806: The vehicle control device determines the corresponding relationship between the engine speed, the supply voltage and the response delay time.

[0141] For example, the engine speed is 2000 and 2500 respectively, and the supply voltage is 7V, 8V, 10V, 12V and 14V respectively, the corresponding relationship between the engine speed, the supply voltage and the response delay time is shown in Table 1 as follows:

[0142] Table 1

[0143] Engine speed Supply voltage to injector (volts) Response delay time of injector (seconds) 2000 7 2.9269 2000 8 1.7503 2000 10 1.128 2000 12 0.5149 2000 14 0.4453 2500 7 2.3909 2500 8 1.6556 2500 10 1.0205 2500 12 0.7145 2500 14 0.395

[0144] Step 807: When the fuel injector is controlled, the vehicle control device acquires the current supply voltage of the fuel injector.

[0145] In some embodiments, this step is the same as step 207, which will not be described here.

[0146] Step 808: The vehicle control device determines the response delay time corresponding to the engine speed and the current supply voltage from the corresponding relationship between the engine speed, the supply voltage and the response delay time based on the engine speed and the current supply voltage.

[0147] First implementation: The vehicle control device looks up the response delay time corresponding to the engine speed and the current supply voltage from the corresponding relationship between the engine speed, the supply voltage and the response delay time based on the engine speed and the current supply voltage; in the case that the response delay time corresponding to the engine speed and the current supply voltage is found from the corresponding relationship between the engine speed, the supply voltage and the response delay time, the found response delay time is acquired; in the case that the response delay time corresponding to the engine speed and the current supply voltage is not found from the corresponding relationship between the engine speed, the supply voltage and the response delay time, the vehicle control device looks up the supply voltage closest to the current supply voltage based on the engine speed and the current supply voltage from the corresponding relationship between the engine speed, the supply voltage and the response delay time, looks up the response delay time corresponding to the engine speed and the closest supply voltage from the corresponding relationship between the engine speed, the supply voltage and the response delay time based on the engine speed and the closest supply voltage, and corrects the response delay time corresponding to the engine speed and the closest supply voltage to obtain the response delay time corresponding to the engine speed and the current supply voltage.

[0148] The vehicle control device corrects the response delay time by adding or subtracting a preset time length from the response delay time corresponding to the closest power supply voltage; correspondingly, the step of correcting the engine speed and the response delay time corresponding to the closest power supply voltage to obtain the response delay time corresponding to the current power supply voltage can be: in the case that the current power supply voltage is greater than the closest power supply voltage, subtracting a first preset time length from the response delay time corresponding to the closest power supply voltage to obtain the response delay time corresponding to the current power supply voltage; in the case that the current power supply voltage is less than the closest power supply voltage, adding a second preset time length to the response delay time corresponding to the closest power supply voltage to obtain the response delay time corresponding to the current power supply voltage.

[0149] The second implementation manner is to determine the response delay time corresponding to the current power supply voltage by using the response delay times corresponding to two power supply voltages adjacent to the current power supply voltage; correspondingly, in the case that the response delay time corresponding to the engine speed and the current power supply voltage is not found from the correspondence between the engine speed, the power supply voltage and the response delay time, the engine speed and the current power supply voltage are used to find the engine speed corresponding to the two power supply voltages adjacent to the current power supply voltage from the correspondence between the engine speed, the power supply voltage and the response delay time, the engine speed and the response delay times corresponding to the two power supply voltages adjacent to the current power supply voltage are used to find the average of the response delay times corresponding to the two power supply voltages adjacent to the current power supply voltage, and the average is used to determine the response delay time corresponding to the engine speed and the current power supply voltage.

[0150] The third implementation manner is to, in the case that the response delay time corresponding to the engine speed and the current power supply voltage is not found from the correspondence between the engine speed, the power supply voltage and the response delay time, fit the engine speed, the power supply voltage and the response delay time based on the correspondence between the engine speed, the power supply voltage and the response delay time to obtain third relationship data between the engine speed, the power supply voltage and the response delay time, and determine the response delay time corresponding to the engine speed and the current power supply voltage based on the engine speed, the current power supply voltage and the third relationship data.

[0151] The third relationship data among the engine speed, the power supply voltage and the response delay time is used to represent the corresponding relationship among the engine speed, the power supply voltage and the response delay time, and the dependent variable of the third relationship data is the response delay time, and the independent variables are the engine speed and the power supply voltage respectively; the independent variables are set as the engine speed and the current power supply voltage, and the dependent variable determined based on the third relationship data is the response delay time corresponding to the engine speed and the current power supply voltage.

[0152] In step 809, the vehicle control device controls the fuel injector based on the response delay time corresponding to the current power supply voltage.

[0153] In some embodiments, this step is the same as step 209, which will not be repeated here.

[0154] In the embodiments of the present application, since the corresponding relationship among the engine speed, the power supply voltage and the response delay time is calibrated in the calibration stage, that is, the response delay time of the fuel injector under different power supply voltages is known in advance under different engine speeds; therefore, when the fuel injector is controlled, the corresponding response delay time can be accurately determined from the corresponding relationship among the engine speed, the power supply voltage and the response delay time based on the engine speed and the current power supply voltage of the fuel injector, thereby improving the accuracy of the determined response delay time, and further improving the control precision of the fuel injector based on the response delay time.

[0155] Please refer to Figure 9 which shows a block diagram of a control device of a fuel injector according to an exemplary embodiment of the present application. The device includes:

[0156] A first determining module 901 is configured to determine a plurality of power supply voltages for supplying power to the fuel injector of the engine to test the response delay time of the fuel injector under the plurality of power supply voltages.

[0157] A power supply module 902 is configured to supply power to the fuel injector through each power supply voltage.

[0158] A fuel injection module 903 is configured to control the fuel injector to perform a preset time length of fuel injection operation under the power supply of the power supply voltage.

[0159] A first obtaining module 904 is configured to obtain test data of a plurality of sampling points during the fuel injection operation, and the test data of each sampling point includes a fuel injection pulse width of the fuel injector and an instantaneous fuel consumption value of the engine.

[0160] A second determining module 905 is configured to determine the response delay time of the fuel injector under the power supply voltage based on the test data of the plurality of sampling points.

[0161] The third determination module 906 is configured to determine a correspondence between the supply voltage and the response delay time based on the response delay time of the fuel injector under the supply voltage.

[0162] The second acquisition module 907 is configured to acquire a current supply voltage of the fuel injector when the fuel injector is controlled.

[0163] The fourth determination module 908 is configured to determine the response delay time corresponding to the current supply voltage from the correspondence between the supply voltage and the response delay time based on the current supply voltage.

[0164] The control module 909 is configured to control the fuel injector based on the response delay time corresponding to the current supply voltage.

[0165] In a possible implementation, the second determination module 905 is configured to determine first relationship data between the instantaneous fuel consumption value and the fuel injection pulse width based on the test data of the plurality of sampling points; and determine a vertical intercept of the first relationship data, and take the vertical intercept as the response delay time of the fuel injector under the supply voltage.

[0166] In another possible implementation, the second determination module 905 is configured to determine the response delay time of the fuel injector under the supply voltage for each of the plurality of speeds of the engine based on the test data of the plurality of sampling points; and determine an average response time of the fuel injector under the supply voltage based on the response delay time of the fuel injector under the supply voltage for each of the plurality of speeds of the engine, to obtain the response delay time of the fuel injector under the test voltage.

[0167] In another possible implementation, the fourth determination module 908 is configured to, in a case where the response delay time corresponding to the current supply voltage is not queried from the correspondence between the supply voltage and the response delay time based on the current supply voltage, acquire a supply voltage closest to the current supply voltage from the correspondence between the supply voltage and the response delay time; acquire the response delay time corresponding to the closest supply voltage from the correspondence between the supply voltage and the response delay time; and correct the response delay time corresponding to the closest supply voltage to obtain the response delay time corresponding to the current supply voltage.

[0168] In another possible implementation, the fourth determination module 908 is configured to, in a case where the response delay time corresponding to the current supply voltage is not queried from the correspondence between the supply voltage and the response delay time based on the current supply voltage, fit the supply voltage and the response delay time based on the correspondence between the supply voltage and the response delay time to obtain second relationship data between the supply voltage and the response delay time; and determine the response delay time corresponding to the current supply voltage based on the current supply voltage and the second relationship data.

[0169] In another possible implementation, the third determining module 906 is configured to determine the rotating speed of the engine; and determine the corresponding relationship between the rotating speed of the engine, the power supply voltage and the response delay time based on the rotating speed of the engine, the power supply voltage and the response delay time.

[0170] The fourth determining module 908 is configured to determine the response delay time corresponding to the rotating speed of the engine and the current power supply voltage from the corresponding relationship between the rotating speed of the engine, the power supply voltage and the response delay time based on the rotating speed of the engine and the current power supply voltage.

[0171] In the embodiments of the present application, since the corresponding relationship between the power supply voltage and the response delay time is calibrated in the calibration stage, that is, the response delay time of the fuel injector under different power supply voltages is known in advance; therefore, when the fuel injector is controlled, the response delay time of the fuel injector under the current power supply voltage can be obtained based on the current power supply voltage of the fuel injector. Since the accurate response delay time is obtained, the control precision of the fuel injector can be improved by controlling the fuel injector based on the response delay time.

[0172] It should be noted that the control device of the fuel injector provided in the above embodiments is only used as an example for the division of the above functional modules in the control of the fuel injector, and in actual applications, the above functions can be completed by different functional modules according to the needs, that is, the internal structure of the vehicle control device is divided into different functional modules to complete all or part of the functions described above. In addition, the control device of the fuel injector and the control method of the fuel injector provided in the above embodiments belong to the same concept, and the specific implementation process is described in the method embodiments, which will not be repeated here.

[0173] Figure 10is a structural block diagram of a vehicle control device provided by an embodiment of the present application. Generally, the vehicle control device 1000 includes a processor 1001, a memory 1002, a voice receiving apparatus 1003, and a controller 1004. The processor 1001 can include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 1001 can be implemented in at least one of a hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 1001 can also include a main processor and a coprocessor. The main processor is a processor for processing data in a wake-up state, also referred to as a CPU (Central Processing Unit). The coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 1001 can further include an AI (Artificial Intelligence) processor for processing a machine learning-related computing operation.

[0174] The memory 1002 can include one or more computer-readable storage media that can be non-transitory. The memory 1002 can also include a high-speed random access memory, and a non-volatile memory such as one or more disk storage devices, flash storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 1002 is used to store at least one instruction for being executed by the processor 1001 to implement the light control method provided by the method embodiment of the present application.

[0175] In some embodiments, the vehicle control device 1000 can also optionally include a peripheral device interface 1005 and at least one peripheral device. The processor 1001, the memory 1002, and the peripheral device interface 1005 can be connected through a bus or a signal line. Each peripheral device can be connected to the peripheral device interface 1005 through a bus, a signal line, or a circuit board. Specifically, the peripheral device includes at least one of a radio frequency circuit 1006, an audio circuit 1007, and a power supply 1008.

[0176] The peripheral interface 1005 can be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 1001 and the memory 1002. In some embodiments, the processor 1001, the memory 1002 and the peripheral interface 1005 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 1001, the memory 1002 and the peripheral interface 1005 can be implemented on a separate chip or circuit board, and the present embodiments are not limited in this regard.

[0177] The radio frequency circuit 1006 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 1006 communicates with a communication network and other communication devices through electromagnetic signals. The radio frequency circuit 1006 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 1006 includes an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and the like. The radio frequency circuit 1006 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G and 5G), wireless local area networks and / or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 1006 can also include NFC (Near Field Communication) related circuitry, and the present application is not limited in this regard.

[0178] The audio circuit 1007 can include a microphone and a speaker. The microphone is used to collect sound waves of the user and the environment, and convert the sound waves into electrical signals input to the processor 1001 for processing, or input to the radio frequency circuit 1006 for voice communication. For the purpose of stereo sound collection or noise reduction, the microphone can be multiple, arranged at different parts of the vehicle control device 1000. The microphone can also be an array microphone or an omnidirectional collection microphone. The speaker is used to convert electrical signals from the processor 1001 or the radio frequency circuit 1006 into sound waves. The speaker can be a conventional diaphragm speaker, or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only can it convert electrical signals into sound waves audible to humans, but also can convert electrical signals into sound waves inaudible to humans for ranging purposes. In some embodiments, the audio circuit 1007 can also include a headphone jack.

[0179] The power supply 1008 is used to supply power for each component in the vehicle control device 1000. The power supply 1008 can be alternating current, direct current, disposable battery or rechargeable battery. When the power supply 1008 includes a rechargeable battery, the rechargeable battery can support wired charging or wireless charging. The rechargeable battery can also be used to support fast charging technology.

[0180] Those skilled in the art can understand that, Figure 10 The structure shown in the figure does not constitute a limitation on the vehicle control device 1000, and can include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0181] The embodiments of the present application also provide a computer readable storage medium, which stores at least one program code. The at least one program code is loaded and executed by a processor to implement the control method of the fuel injector according to any of the above embodiments. Optionally, the storage medium can be a non-transitory computer readable storage medium, for example, a non-transitory computer readable storage medium can be a ROM (Read-Only Memory), a RAM (Random Access Memory), a CD-ROM (Compact Disc Read-Only Memory), a magnetic tape, a floppy disk and an optical data storage device, etc.

[0182] The embodiments of the present application also provide a computer program product, which stores at least one program code. The at least one program code is loaded and executed by a processor to implement the control method of the fuel injector according to the above embodiments.

[0183] In some embodiments, the computer program product related to the embodiments of the present application can be deployed to execute on a vehicle control device, or execute on multiple vehicle control devices located in one place, or execute on multiple vehicle control devices distributed in multiple places and interconnected through a communication network, which can constitute a blockchain system.

[0184] Those skilled in the art can understand that all or part of the steps of the above embodiments can be completed by hardware, or by a program instructing related hardware, which can be stored in a computer readable storage medium, and the above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc.

[0185] The above description is only to facilitate those skilled in the art to understand the technical solutions of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for controlling a fuel injector, characterized in that: The method comprises: determining a plurality of supply voltages, the plurality of supply voltages being used to power a fuel injector of an engine, to test a response delay time of the fuel injector under the plurality of supply voltages; For each supply voltage, powering the injector via the supply voltage; Controlling the fuel injector to perform a fuel injection operation for a preset time period under the power supply voltage; During the fuel injection operation, test data of a plurality of sampling points are acquired, wherein the test data of each sampling point includes the injection pulse width of the fuel injector and the instantaneous fuel consumption value of the engine; determining a response delay time of the fuel injector under the supply voltage based on the test data of the plurality of sampling points; determining a corresponding relationship between the supply voltage and the response delay time based on the response delay time of the injector under the supply voltage; When controlling the fuel injector, obtaining the current power supply voltage of the fuel injector; Based on the current power supply voltage, determining the response delay time corresponding to the current power supply voltage from a correspondence between the power supply voltage and the response delay time; The fuel injector is controlled based on the response delay time corresponding to the current power supply voltage.

2. The method according to claim 1, characterized in that The step of determining the response delay time of the fuel injector under the supply voltage based on the test data of the plurality of sampling points includes: Determining first relationship data between instantaneous fuel consumption and injection pulse width based on the test data of the plurality of sampling points; Determine a vertical intercept of the first relationship data, and use the vertical intercept as a response delay time of the injector under the supply voltage.

3. The method according to claim 1, characterized in that The step of determining the response delay time of the fuel injector under the supply voltage based on the test data of the plurality of sampling points includes: determining, based on the test data of the plurality of sampling points, a response delay time of the injector at each of a plurality of speeds and a response of the injector under the supply voltage when the speed of the engine is at each of a plurality of speeds; Based on the engine speed being each of a plurality of speeds and the response delay time of the injector under the supply voltage, an average response time of the injector under the supply voltage is determined to obtain the response delay time of the injector under the supply voltage.

4. The method according to claim 1, wherein The determining, based on the current power supply voltage and from a correspondence between the power supply voltage and the response delay time, a response delay time corresponding to the current power supply voltage includes: If, based on the current supply voltage, no response delay time corresponding to the current supply voltage is found from the correspondence between supply voltages and response delay times, obtaining a supply voltage closest to the current supply voltage from the correspondence between supply voltages and response delay times; Obtaining the response delay time corresponding to the closest supply voltage from the corresponding relationship between the supply voltage and the response delay time; The response delay time corresponding to the closest power supply voltage is corrected to obtain the response delay time corresponding to the current power supply voltage.

5. The method according to claim 1, wherein The determining, based on the current power supply voltage and from a correspondence between the power supply voltage and the response delay time, a response delay time corresponding to the current power supply voltage includes: If, based on the current supply voltage, no response delay time corresponding to the current supply voltage is found from the correspondence relationship between the supply voltage and the response delay time, fitting the supply voltage and the response delay time based on the correspondence relationship between the supply voltage and the response delay time to obtain second relationship data between the supply voltage and the response delay time; Based on the current power supply voltage and the second relationship data, a response delay time corresponding to the current power supply voltage is determined.

6. The method according to claim 1, characterized in that The determining the corresponding relationship between the supply voltage and the response delay time based on the response delay time of the injector under the supply voltage includes: determining a rotational speed of the engine; Determining a correspondence between the engine speed, the power supply voltage, and the response delay time based on the engine speed, the power supply voltage, and the response delay time; The determining, based on the current power supply voltage and from a correspondence between the power supply voltage and the response delay time, a response delay time corresponding to the current power supply voltage includes: Based on the engine speed and the current power supply voltage, the response delay time corresponding to the engine speed and the current power supply voltage is determined from the corresponding relationship between the engine speed, the power supply voltage and the response delay time.

7. A control device for a fuel injector, characterized in that: The device comprises: a first determining module, configured to determine a plurality of supply voltages, the plurality of supply voltages being used to power an injector of an engine, so as to test a response delay time of the injector under the plurality of supply voltages; a power supply module, configured to supply power to the injector via the supply voltage for each supply voltage; A fuel injection module, used for controlling the fuel injector to perform a fuel injection operation for a preset time period under the power supply voltage; a first acquisition module, configured to acquire test data of a plurality of sampling points during the fuel injection operation, wherein the test data of each sampling point includes the injection pulse width of the injector and the instantaneous fuel consumption value of the engine; a second determining module, configured to determine a response delay time of the injector under the supply voltage based on the test data of the plurality of sampling points; a third determining module, configured to determine a correspondence between a supply voltage and a response delay time based on a response delay time of the injector under the supply voltage; a second acquisition module, configured to acquire a current supply voltage of the fuel injector when controlling the fuel injector; a fourth determining module, configured to determine, based on the current supply voltage and from a correspondence between the supply voltage and the response delay time, a response delay time corresponding to the current supply voltage; A control module is used to control the injector based on a response delay time corresponding to the current power supply voltage.

8. A vehicle control device, characterized in that: The vehicle control device includes a processor and a memory, wherein the memory stores at least one program code, and the at least one program code is loaded and executed by the processor to implement the injector control method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The storage medium stores at least one program code, and the at least one program code is loaded and executed by the processor to implement the injector control method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The product stores at least one program code, and the at least one program code is used to be executed by a processor to implement the control method of the fuel injector according to any one of claims 1 to 6.

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