Gasoline engine control method, device and equipment without pressure release valve and vehicle

Abstract

The invention is suitable for the technical field of gasoline engine control, and provides a gasoline engine control method, device and equipment without a pressure release valve and a vehicle. The method comprises the steps that pressure information of a supercharger and vehicle condition information of the vehicle at the current moment are obtained, the vehicle is provided with a gasoline engine and a gasoline engine air inlet pipeline, and the supercharger and a throttle valve are arranged on the gasoline engine air inlet pipeline; the throttle valve is located between the supercharger and the gasoline engine, whether surge happens to the supercharger currently or not is judged according to the pressure information and the vehicle condition information, a current surge judgment result is obtained, and when the current surge judgment result is that surge happens to the supercharger, the target opening degree of the throttle valve at the current moment is calculated according to the pressure information; and the throttle valve is controlled to be opened to the target opening degree, so that gas flowing through the supercharger is released to the gasoline engine gas inlet pipeline through the throttle valve. By means of the gasoline engine, the problem that surge is likely to happen after a pressure release valve of the gasoline engine is omitted can be solved.

Description

Technical Field

[0001] This application belongs to the technical field of gasoline engine control, and particularly relates to a gasoline engine control method, device, equipment and vehicle without a pressure relief valve. Background Art

[0002] Whether it is a traditional gasoline vehicle or a hybrid vehicle, gasoline engines equipped with superchargers are widely used in the automotive field. The gasoline engine generates power by burning a mixture of gasoline and air to drive the vehicle. The gasoline engine is provided with a supercharger (or compressor) on the intake pipeline. After the air is compressed by the supercharger, its density increases, and then it enters the throttle valve through the intake pipeline. The throttle valve adjusts the intake air flow according to the accelerator pedal, and finally the air enters the cylinder to participate in combustion. Therefore, the setting of the supercharger improves the intake air volume of the gasoline engine.

[0003] When a vehicle with a supercharger decelerates during the supercharging condition, the throttle valve closes. At this time, if the air flow between the supercharger and the throttle valve cannot be released, the supercharger will operate under the condition of high pressure ratio and small flow rate. Under the condition of high pressure ratio and small flow rate, the outlet pressure of the supercharger is significantly higher than the inlet, and the gas flow rate through the supercharger is low, resulting in an increased risk of the supercharger surging, affecting the driving performance of the whole vehicle, and affecting the service life of the supercharger.

[0004] To avoid the above-mentioned surging phenomenon, the current common method is to set a pressure relief valve between the supercharger and the throttle valve. When the throttle valve closes, the pressure relief valve releases the excess supercharging pressure to prevent the high-pressure air from flowing back and impacting the impeller of the supercharger. However, the pressure relief valve will increase the cost of the gasoline engine and generate noise during pressure relief. For vehicles with gasoline engines equipped with superchargers, if the pressure relief valve is removed, surging is likely to occur, affecting drivability and the life of the supercharger. Summary of the Invention

[0005] The embodiments of this application provide a gasoline engine control method, device, equipment and vehicle without a pressure relief valve, which can solve the problem of easy surging caused by removing the pressure relief valve of the gasoline engine.

[0006] In a first aspect, the embodiments of this application provide a gasoline engine control method without a pressure relief valve, including: obtaining the pressure information of the supercharger and the vehicle condition information at the current moment, where the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline, the gasoline engine intake pipeline is provided with a supercharger and a throttle valve, and the throttle valve is located between the supercharger and the gasoline engine;

[0007] Judging whether the supercharger surges currently according to the pressure information and the vehicle condition information to obtain the current surging judgment result;

[0008] When the current surge determination result indicates that the supercharger surges, based on the pressure information, calculate the target opening of the throttle valve at the current moment;

[0009] Control the throttle valve to open to the target opening, so that the gas flowing through the supercharger is released to the intake pipeline of the gasoline engine through the throttle valve.

[0010] In a possible implementation manner of the first aspect, the pressure information includes the outlet pressure;

[0011] The vehicle condition information of the vehicle includes the gasoline engine demand torque, where the gasoline engine demand torque is determined based on the current demand of the user to control the vehicle;

[0012] When the vehicle is a hybrid vehicle, to determine whether the supercharger surges currently according to the pressure information and the vehicle condition information, and obtain the current surge determination result, it includes:

[0013] When the hybrid vehicle is in the fuel-off state, determine whether the supercharger surges currently according to the outlet pressure and the gasoline engine demand torque;

[0014] When the outlet pressure is greater than the preset pressure threshold and the gasoline engine demand torque is greater than the preset torque threshold, determine that the current surge determination result is that the supercharger surges.

[0015] In a possible implementation manner of the first aspect, the pressure information includes the outlet pressure;

[0016] The vehicle condition information of the vehicle includes the accelerator pedal change rate;

[0017] When the vehicle is a traditional gasoline vehicle, to determine whether the supercharger surges currently according to the pressure information and the vehicle condition information, and obtain the current surge determination result, it includes:

[0018] When the traditional gasoline vehicle is in the fuel-off state, determine whether the supercharger surges currently according to the outlet pressure and the accelerator pedal change rate;

[0019] When the outlet pressure is greater than the preset pressure threshold and the accelerator pedal change rate is greater than the preset pedal change threshold, determine that the current surge determination result is that the supercharger surges.

[0020] In a possible implementation manner of the first aspect, the pressure information includes the inlet pressure and the outlet pressure;

[0021] When the current surge determination result indicates that the supercharger surges, based on the pressure information, calculating the target throttle opening at the current moment, includes:

[0022] When the current surge determination result indicates that the supercharger surges, obtaining the rotational speed of the supercharger at the current moment;

[0023] Based on the rotational speed, the inlet pressure, and the outlet pressure of the supercharger at the current moment, calculating the target gas flow rate at the current moment, where the target gas flow rate represents the minimum gas flow rate passing through the throttle when the supercharger does not surge;

[0024] Based on the target gas flow rate, determining the target throttle opening at the current moment corresponding to the target gas flow rate based on the pre - established correspondence between the gas flow rate passing through the throttle and the throttle opening.

[0025] In a possible implementation manner of the first aspect, the vehicle condition information of the vehicle includes the gasoline engine demand torque; the method further includes:

[0026] Based on the target gas flow rate at the current moment, calculating the target gas path torque of the gasoline engine at the current moment;

[0027] Based on the target gas path torque and the gasoline engine demand torque of the gasoline engine at the current moment, calculating the target ignition path torque of the gasoline engine at the current moment;

[0028] Controlling the ignition path torque of the gasoline engine to rapidly decrease to the target ignition path torque to balance the torque of the gasoline engine.

[0029] In a possible implementation manner of the first aspect, the method further includes:

[0030] Based on the target ignition path torque of the gasoline engine at the current moment, calculating the target ignition angle of the gasoline engine at the current moment;

[0031] Controlling the ignition angle of the gasoline engine to rapidly decrease to the target ignition angle.

[0032] In a possible implementation manner of the first aspect, the calculating the target gas flow rate at the current moment based on the rotational speed, the inlet pressure, and the outlet pressure of the supercharger at the current moment, includes:

[0033] Based on the rotational speed of the supercharger at the current moment, determine the target surge pressure ratio corresponding to the rotational speed of the supercharger at the current moment according to the pre-established correspondence between the rotational speed of the supercharger and the surge pressure ratio, where the surge pressure ratio represents the pressure ratio at which surge occurs corresponding to the rotational speed of the supercharger at the moment of fuel cut-off;

[0034] Calculate the current pressure ratio of the supercharger according to the inlet pressure and the outlet pressure;

[0035] Calculate the target gas flow rate at the current moment according to the current pressure ratio and the target surge pressure ratio of the supercharger, and the volume and temperature of the unreleased gas obtained in advance, where the unreleased gas represents the gas that has not been released between the outlet of the supercharger and the throttle valve.

[0036] In a second aspect, an embodiment of the present application provides a gasoline engine control device without a pressure relief valve, including:

[0037] A data acquisition module, configured to acquire the pressure information of the supercharger and the vehicle condition information of the vehicle at the current moment, where the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline, and a supercharger and a throttle valve are arranged on the gasoline engine intake pipeline, and the throttle valve is located between the supercharger and the gasoline engine;

[0038] A surge judgment module, configured to judge whether the supercharger currently surges according to the pressure information and the vehicle condition information, and obtain the current surge judgment result;

[0039] A parameter calculation module, configured to calculate the target opening degree of the throttle valve at the current moment according to the pressure information when the current surge judgment result is that the supercharger surges;

[0040] A gasoline engine control module, configured to control the throttle valve to open to the target opening degree, so that the gas flowing through the supercharger is released to the gasoline engine intake pipeline through the throttle valve.

[0041] In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method described in any one of the above is implemented.

[0042] In a fourth aspect, an embodiment of the present application provides a vehicle, including a gasoline engine and a gasoline engine intake pipeline, and the above-mentioned gasoline engine control device without a pressure relief valve.

[0043] Fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the method described in any one of the above.

[0044] Sixth aspect, an embodiment of the present application provides a computer program product, which when running on a control device of a trailer power take-off port cover causes the control device of the trailer power take-off port cover to execute the method described in any one of the above.

[0045] The beneficial effects of the embodiments of the present application compared with the prior art are as follows: By obtaining the pressure information of the supercharger and the vehicle condition information at the current moment, and judging whether the supercharger is currently surging according to the pressure information and the vehicle condition information, a current surging judgment result is obtained. Among them, the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline, and a supercharger and a throttle valve are arranged on the gasoline engine intake pipeline. The throttle valve is located between the supercharger and the gasoline engine. When the current surging judgment result is that the supercharger surges, according to the pressure information, the target opening of the throttle valve at the current moment is calculated, and the throttle valve is controlled to open to the target opening, so that the gas flowing through the supercharger is released to the gasoline engine intake pipeline through the throttle valve and does not flow back to the supercharger, so as to avoid the surging phenomenon of the supercharger and reduce the impact on the performance of the vehicle and the supercharger, thereby solving the problem of easy surging caused by the cancellation of the pressure relief valve of the gasoline engine. Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 is a schematic flowchart of a control method for a gasoline engine without a pressure relief valve provided by an embodiment of the present application;

[0048] Figure 2 is a schematic flowchart of a calculation method for the target opening of the throttle valve when the supercharger surges provided by an embodiment of the present application;

[0049] Figure 3 is a schematic flowchart of a calculation method for the target gas flow rate at the current moment provided by an embodiment of the present application;

[0050] Figure 4 is a schematic block diagram of the control function of a gasoline engine without a pressure relief valve provided by an embodiment of the present application;

[0051] Figure 5It is a schematic structural diagram of a gasoline engine control device without a pressure relief valve provided by an embodiment of the present application. Specific embodiments

[0052] In the prior art, for vehicles with gasoline engines equipped with superchargers, when the pressure relief valve is cancelled, when the vehicle takes in fuel during the supercharging condition, since the throttle valve is closed, the gas (air) flow between the compressor (supercharger) and the throttle valve cannot be released, causing the compressor to operate under the condition of high pressure ratio and small flow rate, that is, the pressure at the outlet of the compressor is significantly higher than the pressure at the inlet, which easily causes compressor surge, thereby affecting the performance of the entire vehicle and the service life of the compressor.

[0053] An embodiment of the present application provides a gasoline engine control method without a pressure relief valve. Refer to Figure 1 , Figure 1 It is a schematic flow diagram of a gasoline engine control method without a pressure relief valve provided by an embodiment of the present application, including:

[0054] Step S11: Obtain the pressure information of the supercharger and the vehicle condition information at the current moment. Among them, the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline. A supercharger and a throttle valve are arranged on the gasoline engine intake pipeline, and the throttle valve is located between the supercharger and the gasoline engine;

[0055] Step S12: Judge whether the supercharger surges currently according to the pressure information and the vehicle condition information, and obtain the current surge judgment result;

[0056] Step S13: When the current surge judgment result is that the supercharger surges, calculate the target opening of the throttle valve at the current moment according to the pressure information;

[0057] Step S14: Control the throttle valve to open to the target opening, so that the gas flowing through the supercharger is released to the gasoline engine intake pipeline through the throttle valve.

[0058] It should be noted that the vehicle includes hybrid vehicles and traditional gasoline vehicles. An engine controller (Engine Control Unit, abbreviated as ECU) is provided in both hybrid vehicles and traditional gasoline vehicles, and the engine controller is used to control the operation of the engine (gasoline engine). A vehicle controller (Hybrid Control Unit, abbreviated as HCU) is also provided in hybrid vehicles and traditional gasoline vehicles, which is used to control the operation of the entire vehicle, including distributing torque to the gasoline engine and the motor in the hybrid vehicle, etc.

[0059] Specifically, in vehicles such as hybrid vehicles and traditional gasoline vehicles, a gasoline engine and a gasoline engine intake pipeline are provided. A supercharger and a throttle valve are provided on the gasoline engine intake pipeline, and the throttle valve is located between the supercharger and the gasoline engine. During the operation of the vehicle, the supercharger compresses air, and the compressed air enters the throttle valve through the intake pipeline. The throttle valve adjusts the intake air flow according to the accelerator pedal, and finally the air enters the gasoline engine to participate in combustion. The gasoline engine generates power by burning the mixture of gasoline and air to drive the vehicle.

[0060] The pressure information and speed of the supercharger are collected in real time through a collection device such as a pressure sensor and sent to the ECU in real time. The ECU stores the pressure information and speed received from the collection device. Among them, the pressure information of the supercharger includes the outlet pressure and inlet pressure of the supercharger at the current moment. The outlet pressure represents the pressure at the outlet of the supercharger, and the inlet pressure represents the pressure at the inlet of the supercharger. The speed of the supercharger represents the turbine speed of the supercharger.

[0061] The HCU collects and obtains the vehicle condition information in real time, including the operating condition of the vehicle, the required torque of the vehicle, the pedal change rate of the user stepping on the accelerator, etc., and sends the vehicle condition information obtained in real time to the ECU, and distributes torque to the gasoline engine according to the required torque of the vehicle.

[0062] Whether it is a hybrid vehicle or a traditional gasoline vehicle, after the ECU obtains the pressure information of the supercharger and the vehicle condition information in the above manner, it judges whether the supercharger meets the conditions for surging at the current moment according to the received pressure information of the supercharger and the vehicle condition information. When the supercharger meets the conditions for surging, it is determined that the supercharger surges at the current moment, and the current surging judgment result is that the supercharger surges. When the supercharger does not meet the conditions for surging, it is determined that the supercharger does not surge at the current moment, and the current surging judgment result is that the supercharger does not surge.

[0063] When the current surging judgment result is that the supercharger surges, the ECU calculates the target gas flow corresponding to the speed of the supercharger at the current moment according to the pressure information of the supercharger and the speed of the supercharger at the current moment. Among them, the target gas flow represents the minimum gas flow passing through the throttle valve when the supercharger does not surge. The ECU calculates the target opening of the throttle valve according to the calculated target gas flow.

[0064] The ECU opens the throttle valve to the target opening according to the calculated target opening of the throttle valve, releases the gas behind the supercharger and in front of the throttle valve into the intake pipeline, reduces the outlet pressure of the supercharger, and thus avoids the gas behind the supercharger and in front of the throttle valve from flowing back to the supercharger, causing the supercharger to surge.

[0065] In an optional example, when the ECU recognizes that the current surge judgment result indicates that the supercharger is surging, the ECU sends a surge signal (such as a surge flag bit) to the HCU. When the HCU receives the surge signal, it allocates the required torque for the gasoline engine. When the torque output by the gasoline engine is equal to the required torque for the gasoline engine, the user's demand is met. The torque output by the gasoline engine includes the air path torque and the ignition path torque. Among them, the air path torque is the torque of the gasoline engine controlled by the intake system of the gasoline engine (such as throttle opening, intake air volume), and the ignition path torque is the torque of the gasoline engine controlled by the ignition system (such as ignition angle).

[0066] The ECU can control and adjust the air path torque and the ignition path torque so that the torque output by the gasoline engine is equal to the allocated required torque for the gasoline engine. When the pressure relief valve is cancelled and the vehicle is in the fuel cut-off state, in order to avoid surging, the throttle is opened to the target opening. At this time, the opening of the throttle is larger than that when there is a pressure relief valve, resulting in an increase in the intake air volume of the gasoline engine compared to when there is a pressure relief valve, an improvement in combustion efficiency, and an increase in the air path torque. If no measures are taken, the torque output by the gasoline engine will be greater than the required torque for the gasoline engine. To make the torque output by the gasoline engine equal to the required torque for the gasoline engine, it is necessary to offset the increased part of the air path torque caused by the increase in the throttle opening by quickly reducing the ignition path torque, so that the torque output by the gasoline engine is equal to the required torque for the gasoline engine.

[0067] For example: control the ignition path torque to quickly decrease to the target ignition path torque to offset the increased part of the air path torque, so that the torque output by the gasoline engine remains the required torque for the gasoline engine. At the same time, according to the vehicle condition information, control the air path torque to slowly decrease, so that the air path torque slowly decreases and the throttle slowly closes.

[0068] As Figure 4 shown,[[]]END]] Figure 4 is a schematic block diagram of the control function of a gasoline engine without a pressure relief valve provided by an embodiment of the present application. The control function of the ECU includes judging whether the supercharger surges, calculating the minimum gas flow rate passing through the throttle when the supercharger does not surge, and the target opening of the throttle.

[0069] It can be understood that for the technical solution provided in this embodiment, by obtaining the pressure information of the supercharger and the vehicle condition information of the vehicle at the current moment, and judging whether the supercharger is surging currently according to the pressure information and the vehicle condition information, the current surging judgment result is obtained. Among them, the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline. A supercharger and a throttle valve are arranged on the gasoline engine intake pipeline, and the throttle valve is located between the supercharger and the gasoline engine. When the current surging judgment result is that the supercharger is surging, according to the pressure information, the target opening of the throttle valve at the current moment is calculated, and the throttle valve is controlled to open to the target opening, so that the gas flowing through the supercharger is released to the gasoline engine intake pipeline through the throttle valve and does not flow back to the supercharger, so as to avoid the surging phenomenon of the supercharger and reduce the impact on the performance of the vehicle and the supercharger, thereby solving the problem of easy surging caused by the cancellation of the pressure relief valve of the gasoline engine.

[0070] In a possible implementation manner, the pressure information in step S11 includes the outlet pressure; the vehicle condition information of the vehicle includes the gasoline engine demand torque, where the gasoline engine demand torque is determined based on the current demand of the user to control the vehicle. When the vehicle is a hybrid vehicle, in step S12, judging whether the supercharger is surging currently according to the pressure information and the vehicle condition information, and obtaining the current surging judgment result includes:

[0071] When the hybrid vehicle is in the fuel cut state, judging whether the supercharger is surging currently according to the outlet pressure and the gasoline engine demand torque;

[0072] When the outlet pressure is greater than the preset pressure threshold and the gasoline engine demand torque is greater than the preset torque threshold, it is determined that the current surging judgment result is that the supercharger is surging.

[0073] Specifically, the pressure information includes the outlet pressure. The ECU reads the outlet pressure of the supercharger through devices such as a boost pressure sensor, and the outlet pressure of the supercharger is the pressure after supercharging. The vehicle condition information of the vehicle includes the gasoline engine demand torque. The ECU obtains the gasoline engine demand torque through the HCU, and the gasoline engine demand torque is allocated by the HCU according to the current demand of the current user to control the vehicle.

[0074] When the vehicle is a hybrid vehicle, when it is determined that the hybrid vehicle is in the fuel cut state, judging whether the supercharger is surging currently according to the outlet pressure of the supercharger at the current moment and the gasoline engine demand torque at the current moment.

[0075] When the hybrid vehicle is in the fuel cut state, when the outlet pressure of the supercharger is greater than the preset pressure threshold and, the gasoline engine demand torque is greater than the preset torque threshold, it is determined that the supercharger meets the condition of surging at the current moment, and it is judged that the supercharger surges at the current moment, and the current surging judgment result is that the supercharger is surging.

[0076] On the contrary, when the hybrid vehicle is in the fuel cut state, if the outlet pressure of the supercharger is not greater than the preset pressure threshold, or the required torque of the gasoline engine is not greater than the preset torque threshold, it is determined that the supercharger does not meet the conditions for surging at the current moment, and it is determined that the supercharger has not surged at the current moment. The current surging judgment result is that the supercharger has not surged.

[0077] When it is determined that the current surging judgment result is that the supercharger has not surged, the opening degree of the throttle valve, the torque of the gasoline engine, etc. are not changed, and the state of the previous moment is continued to be maintained.

[0078] It should be noted that the preset pressure threshold and the preset torque threshold can be set according to the specific situation of the hybrid vehicle (such as the displacement of the gasoline engine and the engine speed of the gasoline engine), and the present application does not make specific limitations thereon. For example: taking a gasoline engine with a displacement of 2.0T as an example, when the hybrid vehicle is in the fuel cut state, the preset pressure threshold and the preset torque threshold corresponding to different engine speeds of the gasoline engine are not exactly the same, as shown in the corresponding relationship between the engine speed of the gasoline engine with a displacement of 2.0T and the preset pressure threshold and the preset torque threshold in Table 1 below.

[0079] Table 1. Corresponding relationship between the engine speed of the gasoline engine with a displacement of 2.0T and the preset pressure threshold and the preset torque threshold

[0080]

[0081] In a possible implementation manner, the vehicle condition information of the vehicle in step S11 further includes the accelerator pedal change rate. When the vehicle is a traditional gasoline vehicle, in step S12, according to the pressure information and the vehicle condition information, it is determined whether the supercharger surges currently, and the current surging judgment result is obtained, including:

[0082] When the traditional gasoline vehicle is in the fuel cut state, it is determined whether the supercharger surges currently according to the outlet pressure and the accelerator pedal change rate;

[0083] When the outlet pressure is greater than the preset pressure threshold and the accelerator pedal change rate is greater than the preset pedal change threshold, it is determined that the current surging judgment result is that the supercharger surges. Among them, the preset pressure threshold for determining whether the supercharger of the traditional gasoline vehicle surges is the same threshold as the preset pressure threshold for judging the hybrid vehicle.

[0084] Specifically, the vehicle condition information of the vehicle includes the accelerator pedal change rate at the current moment, that is, the user's demand, and the ECU obtains the accelerator pedal change rate at the current moment through the HCU.

[0085] When the vehicle is a traditional gasoline vehicle, when it is determined that the traditional gasoline vehicle is in the fuel cut state, it is determined whether the supercharger surges currently according to the outlet pressure of the supercharger at the current moment and the accelerator pedal change rate at the current moment.

[0086] When the traditional gasoline vehicle is in the fuel cut-off state, if the outlet pressure of the supercharger is greater than the preset pressure threshold and the change rate of the accelerator pedal is greater than the preset pedal change threshold, it is determined that the supercharger meets the conditions for surging at the current moment, and it is determined that the supercharger surges at the current moment, and the current surging judgment result is that the supercharger surges.

[0087] On the contrary, when the traditional gasoline vehicle is in the fuel cut-off state, if the outlet pressure of the supercharger is not greater than the preset pressure threshold, or the change rate of the accelerator pedal is not greater than the preset pedal change threshold, it is determined that the supercharger does not meet the conditions for surging at the current moment, and it is determined that the supercharger does not surge at the current moment, and the current surging judgment result is that the supercharger does not surge.

[0088] When it is determined that the current surging judgment result is that the supercharger does not surge, the opening degree of the throttle valve, the torque of the gasoline engine, etc. are not changed, and the state of the previous moment is continued to be maintained.

[0089] It should be noted that the preset pressure threshold and the preset pedal change threshold can also be set according to the specific situation of the traditional gasoline vehicle (such as the displacement of the gasoline engine and the engine speed of the gasoline engine), and the present application does not make specific limitations on this. For example: taking a gasoline engine with a displacement of 2.0T as an example, when the traditional gasoline vehicle is in the fuel cut-off state, the preset pressure threshold and the preset pedal change threshold corresponding to different engine speeds of the gasoline engine are not exactly the same, as shown in the following Table 2 showing the correspondence between the engine speed of the gasoline engine with a displacement of 2.0T and the preset pressure threshold and the preset pedal change threshold.

[0090] Table 2. Correspondence between the engine speed of the gasoline engine with a displacement of 2.0T and the preset pressure threshold and the preset pedal change threshold

[0091]

[0092] In a possible implementation manner, the pressure information includes the inlet pressure and the outlet pressure; as Figure 2 shown, Figure 2 is a schematic flow chart of a method for calculating the target opening degree of the throttle valve when the supercharger surges provided by an embodiment of the present application. An embodiment of the present application provides a method for calculating the target opening degree of the throttle valve when the supercharger surges. In step S13, when the current surging judgment result is that the supercharger surges, according to the pressure information, the target opening degree of the throttle valve at the current moment is calculated, including:

[0093] Step S131, when the current surging judgment result is that the supercharger surges, obtain the speed of the supercharger at the current moment;

[0094] Step S132: Calculate the target gas flow rate at the current moment based on the rotational speed, inlet pressure, and outlet pressure of the supercharger at the current moment, where the target gas flow rate represents the minimum gas flow rate passing through the throttle valve when the supercharger does not surge.

[0095] Step S133: Based on the target gas flow rate, determine the target opening of the throttle valve at the current moment corresponding to the target gas flow rate according to the pre-established correspondence between the gas flow rate passing through the throttle valve and the opening of the throttle valve.

[0096] Specifically, when the current surge determination result is that the supercharger surges, calculate the target opening of the throttle valve at the current moment according to the pressure information, including:

[0097] Since the ECU can obtain the rotational speed of the supercharger in real time, when it is determined that the supercharger surges at the current moment, the ECU obtains the rotational speed of the supercharger at the current moment.

[0098] Based on the inlet pressure and outlet pressure of the supercharger obtained above, the ECU can calculate the pressure ratio of the supercharger at the current moment. According to the calculated pressure ratio of the supercharger at the current moment and the information of the gas flowing through the supercharger and the throttle valve, the minimum gas flow rate passing through the throttle valve when the supercharger does not surge at the current moment can be calculated. Take the minimum gas flow rate passing through the throttle valve when the supercharger does not surge as the target gas flow rate passing through the throttle valve at the current moment.

[0099] It should be noted that there is a correspondence between the gas flow rate passing through the throttle valve and the opening of the throttle valve, that is, the ECU stores the pre-established correspondence between the gas flow rate passing through the throttle valve and the opening of the throttle valve. The correspondence between the gas flow rate passing through the throttle valve and the opening of the throttle valve can be obtained based on multiple experiences or through other means. This application does not make specific limitations on this.

[0100] Specifically, through the target gas flow rate calculated above, find the opening of the throttle valve corresponding to the target gas flow rate from the correspondence between the gas flow rate passing through the throttle valve and the opening of the throttle valve, and take the opening of the throttle valve corresponding to the target gas flow rate as the target opening of the throttle valve.

[0101] The ECU controls the opening of the throttle valve to control the opening of the throttle valve at the target opening, so that the gas causing the supercharger to surge is released to the intake pipeline through the throttle valve, thereby avoiding surging.

[0102] In a possible implementation manner, the vehicle condition information includes the demand torque of the gasoline engine. In step S132, after calculating the target gas flow rate at the current moment based on the rotational speed, inlet pressure, and outlet pressure of the supercharger at the current moment, the above method further includes:

[0103] Step S134: Calculate the target gas path torque of the gasoline engine at the current moment according to the target gas flow at the current moment.

[0104] Step S135: Calculate the target ignition path torque of the gasoline engine at the current moment according to the target gas path torque of the gasoline engine and the required torque of the gasoline engine at the current moment.

[0105] Step S136: Control the ignition path torque of the gasoline engine to quickly decrease to the target ignition path torque so as to balance the torque of the gasoline engine.

[0106] Specifically, the vehicle condition information of the vehicle includes the required torque of the gasoline engine. The required torque of the gasoline engine represents the torque allocated to the gasoline engine by the HCU according to the driver's torque requirement. When it is determined that the supercharger surges, if the opening of the throttle valve that needs to be closed during fuel cut-off is increased, it will cause an increase in the gas path torque. At this time, the ECU can balance the increase in the torque output by the gasoline engine caused by the increase in the opening of the throttle valve by quickly decreasing the ignition path torque, so that the torque output by the gasoline engine is still the required torque of the gasoline engine, thereby achieving the purpose of not affecting the final output torque of the vehicle.

[0107] For traditional gasoline vehicles and hybrid vehicles, when the vehicle is in the fuel cut-off state, the torque requirement after fuel cut-off comes from the driver's torque requirement. Considering the driving performance of the vehicle comprehensively, the required torque of the gasoline engine can be obtained. As Figure 4 shown, the control function of the ECU also includes obtaining the required torque of the gasoline engine.

[0108] In an optional example, for a hybrid vehicle, the torque requirement of the hybrid vehicle after fuel cut-off comes from the HCU. The HCU allocates torque to the ECU according to energy management (such as the current battery power and deceleration requirement at this time, etc.).

[0109] Specifically, when it is determined that the supercharger surges, the ECU determines the target gas path torque of the gasoline engine at the current moment according to the target gas flow at the current moment calculated above. Among them, there is a corresponding relationship between the gas path torque and the gas flow. Based on the corresponding relationship between the gas path torque and the gas flow, the target gas path torque corresponding to the target gas flow can be determined.

[0110] The ECU calculates the target ignition path torque of the gasoline engine at the current moment according to the calculated target gas path torque of the gasoline engine and the required torque of the gasoline engine at the current moment. Among them, the target ignition path torque represents the target value to which the ignition path torque of the gasoline engine needs to be decreased when the final output torque of the gasoline engine is not affected. When the output torque of the gasoline engine is the required torque of the gasoline engine, the final output torque of the gasoline engine is not affected.

[0111] As Figure 4As shown in the figure, the control function of the ECU further includes calculating the target fuel path torque and the target air path torque. When surging occurs, the ECU controls the opening degree of the throttle valve and controls it at the target opening degree, so that the gas causing the supercharger surge is released to the intake pipeline through the throttle valve, thereby avoiding the occurrence of surging. Moreover, the fuel path torque of the gasoline engine is controlled to rapidly decrease to the target fuel path torque, so that the finally output torque of the gasoline engine is still the required torque of the gasoline engine. At the same time, since it is in the state of releasing the accelerator pedal, after the throttle valve reaches the target opening degree, the air path torque of the gasoline engine is controlled to slowly decrease, so that the air path torque slowly decreases and the throttle valve slowly closes.

[0112] In a possible implementation manner, in step S135, after calculating the target fuel path torque of the gasoline engine at the current moment, the above method further includes:

[0113] Calculating the target ignition angle of the gasoline engine at the current moment according to the target fuel path torque of the gasoline engine at the current moment;

[0114] Controlling the ignition angle of the gasoline engine to rapidly decrease to the target ignition angle.

[0115] Specifically, when the supercharger surges, the pressure is relieved by adjusting the opening degree of the throttle valve so that the gas is released to the intake pipeline of the gasoline engine through the throttle valve. The ECU can calculate the target ignition angle of the gasoline engine at the current moment based on the target fuel path torque of the gasoline engine at the current moment calculated above. By controlling the ignition angle of the gasoline engine to rapidly decrease to the target ignition angle, the fuel path torque of the gasoline engine is rapidly decreased to the target fuel path torque, offsetting the increased part of the air path torque caused by the increase in the opening degree of the throttle valve, so that the output torque of the gasoline engine is still the required torque of the gasoline engine.

[0116] At the same time, since the throttle valve is slowly closed when adjusting the opening degree of the throttle valve and the torque change is also slow, by reducing the ignition angle, the problem of slow torque change can also be compensated.

[0117] As Figure 4 shown, the control function of the ECU further includes calculating the target ignition angle. By reducing the ignition angle, the problem of slow torque change caused by slow adjustment of the throttle valve opening degree is compensated, so that the speed of torque change is increased.

[0118] In a possible implementation manner, as Figure 3 shown, Figure 3 is a schematic flowchart of a calculation method for the target gas flow at the current moment provided by an embodiment of the present application. An embodiment of the present application provides a calculation method for the target gas flow at the current moment. In step S132, according to the rotational speed, inlet pressure, and outlet pressure of the supercharger at the current moment, calculating the target gas flow at the current moment includes:

[0119] Step S1321: Based on the correspondence relationship established in advance between the rotational speed of the supercharger and the surge pressure ratio, determine the target surge pressure ratio corresponding to the rotational speed of the supercharger at the current moment according to the rotational speed of the supercharger at the current moment, where the surge pressure ratio represents the pressure ratio at which surge occurs corresponding to the rotational speed of the supercharger at the moment of fuel cut-off.

[0120] Step S1322: Calculate the current pressure ratio of the supercharger based on the inlet pressure and the outlet pressure.

[0121] Step S1323: Calculate the target gas flow rate at the current moment according to the current pressure ratio and the target surge pressure ratio of the supercharger, and the volume and temperature of the unreleased gas obtained in advance, where the unreleased gas refers to the gas that has not been released between the outlet of the supercharger and the throttle valve.

[0122] It should be noted that the supercharger can be a turbocharger, and the rotational speed of the turbocharger is the rotational speed of the turbine. At the moment of fuel cut-off, there is a correspondence relationship between the rotational speed of the supercharger and the pressure ratio at which surge occurs. The pressure ratio at which surge occurs corresponding to the rotational speed of the supercharger at the moment of fuel cut-off is used as the surge pressure ratio. The correspondence relationship between the rotational speed of the supercharger and the surge pressure ratio is established in advance and stored in the ECU. The pressure ratio represents the ratio between the inlet pressure and the outlet pressure of the supercharger.

[0123] Specifically, when it is recognized that the supercharger surges, based on the correspondence relationship between the rotational speed of the supercharger and the surge pressure ratio stored in advance, find out the surge pressure ratio corresponding to the rotational speed of the supercharger at the current moment according to the rotational speed of the supercharger at the current moment, and determine the surge pressure ratio corresponding to the rotational speed of the supercharger at the current moment as the target surge pressure ratio.

[0124] After performing a division calculation based on the inlet pressure and the outlet pressure of the supercharger at the current moment, the current pressure ratio of the supercharger is obtained. The current pressure ratio represents the pressure ratio of the supercharger at the current moment.

[0125] Perform a subtraction calculation on the current pressure ratio and the target surge pressure ratio of the supercharger to calculate the pressure ratio difference of the supercharger at the current moment.

[0126] According to the calculated pressure ratio difference of the supercharger at the current moment, and the volume and temperature of the unreleased gas obtained in advance, calculate the target gas flow rate m at the current moment according to the following formula:

[0127]

[0128] Among them, p in the formula is the pressure ratio difference of the supercharger at the current moment; v is the volume of the unreleased gas obtained in advance, representing the volume of the unreleased gas between the outlet of the supercharger and the throttle valve; T is the temperature of the unreleased gas obtained in advance, representing the temperature of the unreleased gas between the outlet of the supercharger and the throttle valve; R is a constant.

[0129] According to the above formula, the target gas flow rate m at the current moment is calculated, that is, at the current moment, it is the minimum gas flow rate passing through the throttle valve when the supercharger does not surge.

[0130] It should be noted that the temperature of the unreleased gas can be the average temperature of the unreleased gas between the outlet of the supercharger and the throttle valve. The temperature and volume of the unreleased gas can be collected by a collection device, and the collected temperature and volume of the unreleased gas are sent to the ECU.

[0131] It can be understood that the technical solution provided in this embodiment, by obtaining the pressure information of the supercharger and the vehicle condition information of the vehicle at the current moment, and judging whether the supercharger surges currently according to the pressure information and the vehicle condition information, to obtain the current surge judgment result. Among them, the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline, and a supercharger and a throttle valve are arranged on the gasoline engine intake pipeline, and the throttle valve is located between the supercharger and the gasoline engine. When the current surge judgment result is that the supercharger surges, according to the pressure information, the target opening of the throttle valve at the current moment is calculated, and the throttle valve is controlled to open to the target opening, so that the gas flowing through the supercharger is released to the gasoline engine intake pipeline through the throttle valve and no longer flows back to the supercharger, so as to avoid the surge phenomenon of the supercharger and reduce the impact on the performance of the vehicle and the supercharger, thereby solving the problem of easy surge caused by the cancellation of the pressure relief valve of the gasoline engine.

[0132] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0133] Corresponding to the method described in the above embodiments, Figure 5 The structural schematic diagram of a gasoline engine control device without a pressure relief valve provided by an embodiment of the present application is shown. For the convenience of description, only the parts related to the embodiments of the present application are shown.

[0134] Referring to Figure 5 , the device 5 includes:

[0135] A data acquisition module 51, configured to acquire the pressure information of the supercharger and the vehicle condition information of the vehicle at the current moment, wherein the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline, and a supercharger and a throttle valve are arranged on the gasoline engine intake pipeline, and the throttle valve is located between the supercharger and the gasoline engine;

[0136] A surge judgment module 52, configured to judge whether the supercharger surges currently according to the pressure information and the vehicle condition information, to obtain the current surge judgment result;

[0137] A parameter calculation module 53, configured to calculate a target opening degree of a throttle valve at the current moment according to pressure information when it is determined that the supercharger surges currently;

[0138] A gasoline engine control module 54, configured to control the throttle valve to open to the target opening degree, so that the gas flowing through the supercharger is released to the intake pipeline of the gasoline engine through the throttle valve.

[0139] In a possible implementation, the pressure information includes an outlet pressure;

[0140] The vehicle condition information of the vehicle includes a gasoline engine demand torque, where the gasoline engine demand torque is determined based on the current demand of the user to control the vehicle;

[0141] When the vehicle is a hybrid vehicle, the surge judgment module 52 is specifically configured to judge whether the supercharger surges currently according to the outlet pressure and the gasoline engine demand torque when the hybrid vehicle is in a fuel cut state; when the outlet pressure is greater than a preset pressure threshold and the gasoline engine demand torque is greater than a preset torque threshold, it is determined that the current surge judgment result is that the supercharger surges.

[0142] In a possible implementation, the pressure information includes an outlet pressure;

[0143] The vehicle condition information of the vehicle includes an accelerator pedal change rate;

[0144] When the vehicle is a traditional gasoline vehicle, the surge judgment module 52 is specifically configured to judge whether the supercharger surges currently according to the outlet pressure and the accelerator pedal change rate when the traditional gasoline vehicle is in a fuel cut state; when the outlet pressure is greater than a preset pressure threshold and the accelerator pedal change rate is greater than a preset pedal change threshold, it is determined that the current surge judgment result is that the supercharger surges.

[0145] In a possible implementation, the pressure information includes an inlet pressure and an outlet pressure;

[0146] The parameter calculation module 53 includes:

[0147] A rotation speed acquisition unit 531, configured to acquire the rotation speed of the supercharger at the current moment when it is determined that the supercharger surges currently;

[0148] A target gas flow calculation unit 532, configured to calculate a target gas flow at the current moment according to the rotation speed, the inlet pressure and the outlet pressure of the supercharger at the current moment, where the target gas flow represents the minimum gas flow flowing through the throttle valve when the supercharger does not surge;

[0149] A target opening calculation unit 533 is configured to determine the target opening of the throttle valve at the current moment corresponding to the target gas flow based on the pre-established correspondence between the gas flow through the throttle valve and the opening of the throttle valve according to the target gas flow.

[0150] In a possible implementation manner, the vehicle condition information of the vehicle includes the gasoline engine demand torque;

[0151] The parameter calculation module 53 further includes:

[0152] An air path torque calculation unit 534 is configured to calculate the target air path torque of the gasoline engine at the current moment according to the target gas flow at the current moment;

[0153] A fire path torque calculation unit 535 is configured to calculate the target fire path torque of the gasoline engine at the current moment according to the target air path torque of the gasoline engine at the current moment and the gasoline engine demand torque;

[0154] A torque balance control unit 536 is configured to control the fire path torque of the gasoline engine to quickly decrease to the target fire path torque so as to balance the torque of the gasoline engine.

[0155] In a possible implementation manner, the parameter calculation module 53 further includes:

[0156] A target ignition angle calculation unit 537 is configured to calculate the target ignition angle of the gasoline engine at the current moment according to the target fire path torque of the gasoline engine at the current moment;

[0157] An ignition angle control unit is configured to control the ignition angle of the gasoline engine to quickly decrease to the target ignition angle.

[0158] In a possible implementation manner, the target gas flow calculation unit 532 is specifically configured to determine the target surge pressure ratio corresponding to the rotational speed of the supercharger at the current moment based on the pre-established correspondence between the rotational speed of the supercharger and the surge pressure ratio according to the rotational speed of the supercharger at the current moment, where the surge pressure ratio represents the pressure ratio at which surge occurs corresponding to the rotational speed of the supercharger at the fuel cut-off moment; calculate the current pressure ratio of the supercharger according to the inlet pressure and the outlet pressure; calculate the target gas flow at the current moment according to the current pressure ratio and the target surge pressure ratio of the supercharger, and the pre-acquired volume and temperature of the unreleased gas, where the unreleased gas represents the unreleased gas from the outlet of the supercharger to the throttle valve.

[0159] It should be noted that for the information interaction, execution process, etc. between the above-mentioned devices / units, since they are based on the same concept as the method embodiment of the present application, for their specific functions and the technical effects brought, reference can be specifically made to the method embodiment part, and details are not described herein again.

[0160] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules as needed, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated here.

[0161] An embodiment of this application also provides an electronic device, which includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor. When the processor executes the computer program, the steps in any of the foregoing method embodiments are implemented.

[0162] An embodiment of this application also provides a vehicle, which includes a gasoline engine and a gasoline engine intake pipeline, and a gasoline engine control device without a pressure relief valve according to any one of the above.

[0163] An embodiment of this application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the foregoing method embodiments can be implemented.

[0164] An embodiment of this application provides a computer program product. When the computer program product runs on a mobile terminal, the mobile terminal is enabled to execute the steps in the foregoing method embodiments.

[0165] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-mentioned embodiment methods of this application, a computer program can be used to instruct relevant hardware to complete. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can at least include: any entity or device that can carry the computer program code to the photographing device / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk, or an optical disc, etc. In some jurisdictions, according to legislation and patent practice, the computer-readable medium cannot be an electrical carrier signal and a telecommunication signal.

[0166] In the above embodiments, the descriptions of the various embodiments have their own focuses. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0167] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0168] In the embodiments provided in this application, it should be understood that the disclosed device / network device and method can be implemented in other ways. For example, the device / network device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0169] The unit described as a separating component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed over multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0170] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A gasoline engine control method without a pressure relief valve, characterized in that: include: Acquiring pressure information of the supercharger and vehicle condition information of the vehicle at the current moment, wherein the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline, the gasoline engine intake pipeline is provided with a supercharger and a throttle, and the throttle is located between the supercharger and the gasoline engine; Judging whether the supercharger is currently surging according to the pressure information and the vehicle condition information, and obtaining a current surging judgment result; When the current surge judgment result is that the supercharger is surging, the target opening of the throttle valve at the current moment is calculated according to the pressure information; The throttle valve is controlled to open to the target opening, so that the gas flowing through the supercharger is released to the gasoline engine intake pipe through the throttle valve.

2. The gasoline engine control method without a pressure relief valve as claimed in claim 1, characterized in that: The pressure information includes outlet pressure; The vehicle condition information of the vehicle includes a gasoline engine required torque, wherein the gasoline engine required torque is determined based on a current demand of a user to control the vehicle; When the vehicle is a hybrid vehicle, judging whether the supercharger is currently surging according to the pressure information and the vehicle condition information to obtain a current surging judgment result includes: When the hybrid vehicle is in a fuel reduction state, judging whether the supercharger is currently surging according to the outlet pressure and the required torque of the gasoline engine; When the outlet pressure is greater than a preset pressure threshold, and the gasoline engine required torque is greater than a preset torque threshold, it is determined that the current surge judgment result is that the supercharger is surging.

3. The gasoline engine control method without a pressure relief valve as claimed in claim 1, characterized in that: The pressure information includes outlet pressure; The vehicle condition information of the vehicle includes an accelerator pedal change rate; When the vehicle is a conventional gasoline vehicle, judging whether the supercharger is currently surging according to the pressure information and the vehicle condition information to obtain a current surging judgment result includes: When the conventional gasoline vehicle is in a throttle-reduced state, judging whether the supercharger is currently surging according to the outlet pressure and the accelerator pedal change rate; When the outlet pressure is greater than a preset pressure threshold, and the accelerator pedal change rate is greater than a preset pedal change threshold, it is determined that the current surge judgment result is that the supercharger surges.

4. The gasoline engine control method without a pressure relief valve as claimed in claim 1, characterized in that: The pressure information includes inlet pressure and outlet pressure; When the current surge judgment result is that the supercharger is surging, the target opening of the throttle at the current moment is calculated according to the pressure information, including: When the current surge judgment result is that the supercharger is surging, obtaining the speed of the supercharger at the current moment; Calculating a target gas flow rate at a current moment according to the rotation speed, the inlet pressure, and the outlet pressure of the supercharger at a current moment, wherein the target gas flow rate represents a minimum gas flow rate flowing through the throttle valve when the supercharger does not surge; According to the target gas flow rate, based on a pre-established correspondence between the gas flow rate flowing through the throttle valve and the opening degree of the throttle valve, the target opening degree of the throttle valve at the current moment corresponding to the target gas flow rate is determined.

5. The control method of a gasoline engine without a pressure relief valve as claimed in claim 4, characterized in that: The vehicle condition information of the vehicle includes the required torque of the gasoline engine; the method further includes: Calculating the target gas path torque of the gasoline engine at the current moment according to the target gas flow at the current moment; Calculating a target fire circuit torque of the gasoline engine at the current moment according to the target gas circuit torque of the gasoline engine at the current moment and the required torque of the gasoline engine; The fire circuit torque of the gasoline engine is controlled to be quickly reduced to the target fire circuit torque so as to balance the torque of the gasoline engine.

6. The gasoline engine control method without a pressure relief valve as claimed in claim 5, characterized in that: The method further comprises: Calculating a target ignition angle of the gasoline engine at the current moment according to the target fire-circuit torque of the gasoline engine at the current moment; The ignition angle of the gasoline engine is controlled to be quickly reduced to the target ignition angle.

7. The control method of a gasoline engine without a pressure relief valve as claimed in claim 4, characterized in that: The step of calculating the target gas flow rate at the current moment according to the rotation speed, the inlet pressure, and the outlet pressure of the supercharger at the current moment comprises: According to the speed of the supercharger at the current moment, based on the pre-established correspondence between the speed of the supercharger and the surge pressure ratio, determine a target surge pressure ratio corresponding to the speed of the supercharger at the current moment, wherein the surge pressure ratio represents the pressure ratio when surge occurs corresponding to the speed of the supercharger at the time of oil withdrawal; Calculating a current pressure ratio of the supercharger according to the inlet pressure and the outlet pressure; The target gas flow rate at the current moment is calculated based on the current pressure ratio and the target surge pressure ratio of the supercharger, as well as the volume and temperature of the unreleased gas acquired in advance, wherein the unreleased gas represents the unreleased gas between the outlet of the supercharger and the throttle valve.

8. A gasoline engine control device without a pressure relief valve, characterized in that: include: A data acquisition module, used for acquiring pressure information of the supercharger and vehicle condition information of the vehicle at the current moment, wherein the vehicle is provided with a gasoline engine and a gasoline engine intake pipeline, the gasoline engine intake pipeline is provided with a supercharger and a throttle, and the throttle is located between the supercharger and the gasoline engine; A surge judgment module, used to judge whether the supercharger is currently surging according to the pressure information and the vehicle condition information, and obtain a current surge judgment result; a parameter calculation module, configured to calculate a target opening of the throttle valve at a current moment according to the pressure information when the current surge judgment result indicates that the supercharger is surging; The gasoline engine control module is used to control the throttle valve to open to the target opening, so that the gas flowing through the supercharger is released to the gasoline engine intake pipe through the throttle valve.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

10. A vehicle, characterized in that: It comprises a gasoline engine and a gasoline engine intake pipeline, and a gasoline engine control device without a pressure relief valve as claimed in claim 8.

Images