Engine control method and related equipment of hybrid power system

Abstract

The present application discloses an engine control method and related equipment for a hybrid power system. The method determines a target mode in a preset mode set of the engine, the preset mode set includes a power mode, a fuel-saving mode and a balance mode, and the power mode, the fuel-saving mode and the balance mode correspond to different engine speed and cyclic injection amount conversion relationships; the engine operation is controlled according to the current engine speed and the engine speed and cyclic injection amount conversion relationship corresponding to the target mode, and the maximum operating condition of the engine can be reasonably adjusted according to the engine being in different modes, thereby improving the power and economy of the vehicle to which the hybrid power system belongs, and solving the problem that the existing method of distributing torque based on the power size of the power battery to achieve the adjustment of the engine operating condition is not suitable for all application scenarios.

Description

Technical Field

[0001] The present application relates to the field of engine control technology, and in particular to an engine control method and related equipment for a hybrid power system. Background Art

[0002] As a hybrid system, the single-axle parallel hybrid system is a set of electric drive systems (i.e., electric motors and power batteries) added to the traditional car. The engine and the electric motor can drive the vehicle alone or work together. The fuel-saving principle is that the vehicle can recover braking energy when coasting or braking, that is, the electric motor can generate electricity to charge the power battery; when the vehicle is driving normally, the engine's operating conditions can be adjusted by the electric motor assist or charging the power battery, so that the engine runs in the best fuel consumption area as much as possible, thereby achieving the purpose of reducing fuel consumption.

[0003] The inventors have discovered that currently, torque distribution is based on the power level of the power battery to adjust the engine operating conditions. This control method is not suitable for all application scenarios. For example, when the vehicle is climbing a slope and the power is low, the limited assistance of the electric motor can easily lead to insufficient power. Summary of the invention

[0004] Based on the above-mentioned deficiencies in the prior art, the present application provides an engine control method and related equipment for a hybrid power system to solve the problem that the current torque distribution is based on the power level of the power battery to adjust the engine operating conditions, and this control method is not suitable for all application scenarios.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A first aspect of the present application provides an engine control method for a hybrid power system, comprising:

[0007] Determining a target mode in a preset mode set of the engine, the preset mode set including a power mode, a fuel-saving mode and a balance mode, the power mode, the fuel-saving mode and the balance mode corresponding to different engine speed and cyclic injection amount conversion relationships;

[0008] The operation of the engine is controlled according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode.

[0009] Optionally, in the engine control method of the hybrid power system, determining the target mode in the preset mode set of the engine includes:

[0010] Determining whether an enabling condition of the power mode or an enabling condition of the fuel saving mode is satisfied;

[0011] If it is determined that the enabling condition of the power mode is met, determining that the target mode is the power mode;

[0012] If it is determined that the enabling condition of the fuel-saving mode is met, determining that the target mode is the fuel-saving mode;

[0013] If it is determined that the enabling conditions of the power mode and the enabling conditions of the fuel-saving mode are not met, the target mode is determined to be the balance mode.

[0014] Optionally, in the engine control method of the above-mentioned hybrid power system, the enabling conditions of the power mode include: when the battery power of the hybrid power system is less than a first power threshold, the vehicle to which the hybrid power system belongs has a power mode requirement, and / or the slope of the vehicle to which the hybrid power system belongs is greater than a preset slope threshold.

[0015] Optionally, in the engine control method of the above-mentioned hybrid power system, the enabling conditions of the fuel-saving mode include: when the battery power of the hybrid power system is greater than a second power threshold, the vehicle to which the hybrid power system belongs has no power mode requirement, and the slope of the vehicle to which the hybrid power system belongs is not greater than a preset slope threshold.

[0016] Optionally, in the engine control method of the hybrid power system, if the target mode is the power mode, controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes:

[0017] Determining the cyclic fuel injection amount corresponding to the current speed of the engine according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the power mode;

[0018] Using the determined cyclic fuel injection amount corresponding to the current speed of the engine as the basic fuel amount limit of the engine, and adjusting the combustion parameters of the engine for the purpose of increasing the external characteristic torque of the engine;

[0019] The combustion parameters of the engine include at least one of the following: a rail pressure of the engine, a main injection angle of the engine, an opening of a supercharger bleed valve of the engine, and a state of a mechanical supercharger clutch of the engine.

[0020] Optionally, in the engine control method of the hybrid power system, if the target mode is the fuel-saving mode, controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes:

[0021] Determining the cyclic fuel injection amount corresponding to the current speed of the engine according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the fuel saving mode;

[0022] The determined cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine, and the engine is controlled to operate in a preset fuel consumption area for the purpose of improving the economy of the vehicle to which the hybrid power system belongs.

[0023] Optionally, in the engine control method of the hybrid power system, if the target mode is the balanced mode, controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes:

[0024] Determining the cyclic fuel injection amount corresponding to the current speed of the engine according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the balancing mode;

[0025] The determined cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine, and the basic fuel amount limit of the engine is adjusted in real time according to the battery power of the hybrid power system for the purpose of maintaining a relative balance between the economy and power of the vehicle to which the hybrid power system belongs.

[0026] A second aspect of the present application provides an engine control device for a hybrid power system, comprising:

[0027] a determination unit, configured to determine a target mode in a preset mode set of the engine, wherein the preset mode set includes a power mode, a fuel-saving mode, and a balance mode, wherein the power mode, the fuel-saving mode, and the balance mode correspond to different conversion relationships between engine speed and cyclic injection amount;

[0028] A control unit is used to control the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode.

[0029] The third aspect of the present application discloses an electronic device, comprising:

[0030] Memory and processor;

[0031] Wherein, the memory is used to store programs;

[0032] The processor is used to execute the program, and when the program is executed, it is specifically used to implement the engine control method of the hybrid power system as described in any one of the first aspects disclosed.

[0033] A fourth aspect of the present application discloses a computer storage medium for storing a computer program. When the computer program is executed, it is used to implement the engine control method of the hybrid power system as described in any one of the first aspects disclosed.

[0034] The present application provides an engine control method for a hybrid power system, wherein a target mode is determined in a preset mode set of the engine, the preset mode set includes a power mode, a fuel-saving mode and a balance mode, and the power mode, the fuel-saving mode and the balance mode correspond to different engine speed and cyclic injection amount conversion relationships; the engine operation is controlled according to the current engine speed and the engine speed and cyclic injection amount conversion relationship corresponding to the target mode, and the maximum operating condition of the engine can be reasonably adjusted according to the engine being in different modes, thereby improving the power and economy of the vehicle to which the hybrid power system belongs, and solving the problem that the existing method of distributing torque based on the power size of the power battery to achieve the adjustment of the engine operating condition is not suitable for all application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0036] Figure 1 A schematic diagram of the structure of a single-axis parallel hybrid power system provided in an embodiment of the present application;

[0037] Figure 2 A flow chart of an engine control method for a hybrid power system provided in an embodiment of the present application;

[0038] Figure 3 A control logic diagram of an engine control method for a hybrid power system provided by an embodiment of the present application;

[0039] Figure 4 A schematic diagram of external characteristics of different modes provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of an optimal fuel consumption area for an engine provided in an embodiment of the present application;

[0041] Figure 6 A schematic diagram of the structure of an engine control device for a hybrid power system provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0045] First of all, it should be noted that the single-axis parallel hybrid system Figure 1 As shown, the engine is driven through the clutch, and the power battery controls the drive motor through the motor controller to achieve driving.

[0046] The embodiment of the present application provides an engine control method and related equipment for a hybrid power system to solve the problem that torque distribution is currently performed based on the power level of the power battery to adjust the engine operating conditions, and this control method is not suitable for all application scenarios.

[0047] See also Figure 2 and Figure 3 The engine control method of the hybrid power system mainly includes the following steps:

[0048] S101 . Determine a target mode in a preset mode set of an engine.

[0049] In practical applications, the engine modes of the hybrid system can be divided into the following types based on power and economy: power mode, fuel-saving mode and balance mode. The conversion relationship between the engine speed and the cyclic injection amount corresponding to the power mode, fuel-saving mode and balance mode is different.

[0050] In some embodiments, the conversion relationship between the engine speed and the cyclic injection amount corresponding to each mode can be displayed using a one-dimensional table. For example, the conversion relationship between the engine speed and the cyclic injection amount corresponding to a certain mode can be shown in Table 1-1:

[0051]

[0052] In actual applications, the power mode uses the external characteristic oil quantity in the conversion relationship between the engine speed and the cyclic injection quantity corresponding to the power mode (the power mode external characteristic oil quantity) as the basic oil quantity limit of the engine; the fuel-saving mode uses the external characteristic oil quantity in the conversion relationship between the engine speed and the cyclic injection quantity corresponding to the fuel-saving mode (the fuel-saving mode external characteristic oil quantity) as the basic oil quantity limit of the engine; the balance mode uses the external characteristic oil quantity in the conversion relationship between the engine speed and the cyclic injection quantity corresponding to the balance mode (the balance mode external characteristic oil quantity) as the basic oil quantity limit of the engine. The basic oil quantity limit of the engine is used to limit the cyclic injection quantity of the engine.

[0053] It should be noted that the corresponding external characteristic oil quantity under different modes can be determined by experimental calibration. The external characteristic oil quantity of the power mode is calibrated according to the maximum set external characteristic torque of the engine. The specific calibration method is: during the engine bench test, the engine speed is pulled to a certain fixed speed, and the external characteristic oil quantity of the power mode at this speed is gradually adjusted at full throttle to make the engine torque reach the maximum set torque; the external characteristic oil quantity of the fuel-saving mode can be determined based on the fuel consumption performance of the engine under all working conditions, and the external characteristic torque of the fuel-saving mode is close to the optimal fuel consumption area; the external characteristic torque of the balance mode is generally 10-20Nm lower than the external characteristic torque of the power mode. Performance development engineers can calibrate the balance mode based on experience to obtain the external characteristic oil quantity of the balance mode; specifically, the calibration method of the external characteristic oil quantity of the balance mode is the same as the principle of the power mode.

[0054] It should be noted that the conversion relationship between the engine speed and the cyclic injection amount corresponding to each mode can be represented by an external characteristic curve. For example, the external characteristic diagrams of the power mode, the fuel saving mode and the balance mode can be shown as follows: Figure 4 The external characteristic fuel quantity in this application is based on the conversion relationship table between engine speed and cyclic injection quantity, which represents the maximum cyclic injection quantity allowed by the engine at the current speed. Each speed has a corresponding cyclic injection quantity value.

[0055] In some embodiments, the specific process of step S101, determining the target mode in the preset mode set of the engine, is as follows, mainly including steps S201 to S203:

[0056] S201: Determine whether an enabling condition of a power mode or an enabling condition of a fuel-saving mode is satisfied.

[0057] In practical applications, the enabling conditions of the power mode may include: when the battery power of the hybrid system is less than the first power threshold, the vehicle to which the hybrid system belongs has a power mode demand, and / or the slope of the vehicle to which the hybrid system belongs is greater than a preset slope threshold. The enabling conditions of the fuel saving mode may include: when the battery power of the hybrid system is greater than the second power threshold, the vehicle to which the hybrid system belongs does not have a power mode demand, and the slope of the vehicle to which the hybrid system belongs is not greater than the preset slope threshold.

[0058] For example, when the E / P mode button on the dashboard of the hybrid power system vehicle is in P mode, it indicates that the hybrid power system vehicle has a power mode requirement; when the E / P mode button on the dashboard of the hybrid power system vehicle is in E mode, it indicates that the hybrid power system vehicle has an economic mode requirement, that is, it indicates that the hybrid power system vehicle does not have a power mode requirement. E represents the economic mode, and P represents the power mode.

[0059] It should be noted that the first power threshold is generally smaller than the second power threshold. The first power threshold may be 50%, and the second power threshold may be 80%. Of course, it is not limited thereto, and may also be determined according to the application environment and user needs. This application does not limit this, and all are within the protection scope of this application.

[0060] In practical applications, the preset slope threshold may be 2%; of course, it is not limited thereto, and may also be determined based on the application environment and user needs. This application does not limit this, and all are within the protection scope of this application.

[0061] It should be noted that the slope of the vehicle to which the hybrid power system belongs can be measured by a slope sensor of the vehicle.

[0062] It can be understood that when the battery power of the hybrid system is lower than the first power threshold, it only needs to meet one of the two conditions, namely, the vehicle to which the hybrid system belongs has a power mode requirement and the slope of the vehicle to which the hybrid system belongs is greater than the preset slope threshold, to determine that the enabling condition of the power mode is met; when the battery power of the hybrid system is greater than the second power threshold, if both the conditions that the vehicle to which the hybrid system belongs has a power mode requirement and the slope of the vehicle to which the hybrid system belongs is greater than the preset slope threshold are not met at the same time, it can be determined that the enabling condition of the fuel-saving mode is met.

[0063] If it is determined that the enabling conditions of the power mode are met, step S202 can be executed; if it is determined that the enabling conditions of the fuel-saving mode are met, step S203 can be executed; if it is determined that the enabling conditions of the power mode and the fuel-saving mode are not met, step S204 can be executed.

[0064] S202: Determine that the target mode is a power mode.

[0065] In actual applications, when the battery power of the hybrid system is less than a first power threshold, the vehicle to which the hybrid system belongs is in power mode, and / or the slope of the vehicle to which the hybrid system belongs is greater than a preset slope threshold, the target mode can be determined to be power mode.

[0066] S203: Determine that the target mode is a fuel-saving mode.

[0067] In actual applications, when the battery power of the hybrid system is greater than the second power threshold, the vehicle to which the hybrid system belongs is not in the power mode, and the slope of the vehicle to which the hybrid system belongs is not greater than the preset slope threshold, the target mode can be determined to be the fuel saving mode.

[0068] S204: Determine that the target mode is a balance mode.

[0069] In practical applications, when it is determined that the enabling conditions of the power mode and the enabling conditions of the fuel-saving mode are not met, the target mode may be determined to be the balance mode.

[0070] S102: Control the operation of the engine according to the current engine speed and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode.

[0071] In practical applications, since the preset mode set of the engine includes a power mode, a fuel-saving mode, and a balance mode, when the target mode is determined to be the power mode, the specific process of step S102, controlling the operation of the engine according to the conversion relationship between the engine speed and the cyclic injection amount corresponding to the current engine speed and the target mode, is as follows, mainly including steps S301 and S302:

[0072] S301. Determine the cyclic fuel injection amount corresponding to the current engine speed according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the power mode.

[0073] In practical applications, the cyclic injection amount corresponding to the current engine speed can be obtained by searching in the engine speed and cyclic injection amount conversion relationship table corresponding to the power mode according to the current engine speed.

[0074] S302: Using the determined cyclic fuel injection amount corresponding to the current speed of the engine as the basic fuel amount limit of the engine, and adjusting the combustion parameters of the engine for the purpose of increasing the external characteristic torque of the engine.

[0075] The combustion parameters of the engine include at least one of the following: the rail pressure of the engine, the main injection angle of the engine, the opening of the supercharger bleed valve of the engine, and the state of the mechanical supercharger clutch of the engine.

[0076] In actual applications, after the enabling conditions of the power mode are met, the cyclic fuel injection amount corresponding to the current speed of the engine can be determined based on the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the power mode, and the cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine. At the same time, one or more combinations of the engine rail pressure, the engine main injection angle, the engine supercharger bleed valve opening, and the engine mechanical supercharger clutch opening state are adjusted to optimize combustion and improve the engine's external characteristic torque.

[0077] When it is determined that the target mode is the fuel saving mode, the specific process of step S102, controlling the engine operation according to the current engine speed and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode, is as follows, mainly including steps S401 and S402:

[0078] S401. Determine the cyclic fuel injection amount corresponding to the current engine speed according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the fuel saving mode.

[0079] In practical applications, the cyclic fuel injection amount corresponding to the current engine speed can be obtained by searching in the conversion relationship table of the engine speed and the cyclic fuel injection amount corresponding to the fuel saving mode according to the current engine speed.

[0080] S402: Using the determined cyclic fuel injection amount corresponding to the current engine speed as the basic fuel amount limit of the engine, and controlling the engine to operate in a preset fuel consumption area for the purpose of improving the economy of the vehicle to which the hybrid power system belongs.

[0081] In actual applications, when the enabling conditions of the fuel-saving mode are met, the cyclic fuel injection amount corresponding to the current speed of the engine can be determined based on the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the fuel-saving mode. The cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel limit of the engine, so that the operating conditions of the engine are as close as possible to the preset fuel consumption area to improve the economy of the vehicle to which the hybrid power system belongs.

[0082] In some embodiments, the preset fuel consumption area may be an area where the engine fuel consumption is lower than the preset fuel consumption, or may be an optimal fuel consumption area of ​​the engine. For example, Figure 5 The specific value of the preset fuel consumption can be determined according to the application environment and user needs, and this application does not limit it, and all are within the protection scope of this application.

[0083] When the target mode is determined to be the balanced mode, the specific process of step S102, controlling the engine operation according to the current engine speed and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode, is as follows, mainly including steps S501 and S502:

[0084] S501. Determine the cyclic fuel injection amount corresponding to the current engine speed according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the balance mode.

[0085] In practical applications, the cyclic injection amount corresponding to the current engine speed can be obtained by searching in the engine speed and cyclic injection amount conversion relationship table corresponding to the balance mode according to the current engine speed.

[0086] S502: taking the determined cyclic fuel injection amount corresponding to the current speed of the engine as the basic fuel amount limit of the engine, and adjusting the basic fuel amount limit of the engine in real time according to the battery power of the hybrid power system for the purpose of maintaining a relative balance between the economy and power of the vehicle to which the hybrid power system belongs.

[0087] In actual applications, when the enabling conditions of the balance mode are met, the cyclic fuel injection amount corresponding to the current speed of the engine can be determined based on the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the balance mode. The cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine. The basic fuel amount limit of the engine is corrected based on the real-time battery power of the hybrid power system, so that the battery power of the hybrid power system and the operating status of the engine are maintained at a relatively economical level.

[0088] In some embodiments, maintaining a relative balance between the economy and power of a hybrid power system vehicle may be by determining a proportion of the economy and a proportion of the power of the hybrid power system vehicle, and adjusting a base fuel limit of the engine in real time according to the proportion based on the battery power of the hybrid power system, to ensure that the economy and power of the hybrid power system vehicle always meet the proportion requirements.

[0089] In practice, the sum of the economic ratio and the power ratio is 1, and the power ratio is generally greater than or equal to the economic ratio. In order to make the economy and power of the vehicle to which the hybrid power system belongs relatively balanced, the difference between the power ratio and the economic ratio is less than the preset ratio. Exemplarily, the preset ratio can be any value between 0 and 0.5; of course, it is not limited to this, and can also be determined according to the application environment and user needs, all within the scope of protection of this application.

[0090] It should be noted that, combined with Figure 3 The specific process of correcting the basic fuel quantity limit of the engine based on the real-time battery power of the hybrid system is as follows: the basic fuel quantity limit of the engine is obtained by searching the conversion relationship table between the engine speed and the cyclic injection quantity corresponding to the balance mode through the engine speed; the correction coefficient is obtained by searching the balance mode external characteristic fuel quantity correction table through the real-time battery power of the hybrid system; the correction coefficient is multiplied by the basic fuel quantity limit of the engine to obtain the corrected balance mode external characteristic fuel quantity.

[0091] It should also be noted that the closer the actual operating conditions of the engine are to the optimal fuel consumption zone, the better its economy. However, in the balanced mode, it is necessary to first ensure that the engine's power is not affected. When the battery power of the hybrid system is relatively large, the engine can be assisted, the engine's operating load can be lower, and the external characteristic fuel volume can be closer to the optimal fuel consumption zone. The economy of the vehicle belonging to the hybrid system will be better. However, when the battery power of the hybrid system is relatively low, it is necessary to adjust the engine's external characteristic fuel volume based on the battery power of the hybrid system to ensure the vehicle's power requirements.

[0092] In summary, the engine control method of the hybrid system provided in the present application can reasonably adjust the basic fuel limit of the engine based on the different operating scenarios and battery power levels of the vehicle to which the hybrid system belongs, meet the power requirements of different operating scenarios, and at the same time ensure the optimal economy of the entire vehicle under normal operating conditions.

[0093] The engine control method of the hybrid power system provided in the present embodiment determines a target mode in a preset mode set of the engine, the preset mode set includes a power mode, a fuel-saving mode and a balance mode, and the power mode, the fuel-saving mode and the balance mode correspond to different engine speeds and cyclic injection amount conversion relationships; the engine operation is controlled according to the current engine speed and the engine speed corresponding to the target mode and the conversion relationship between the cyclic injection amount, and the maximum operating condition of the engine can be reasonably adjusted according to the engine being in different modes, thereby improving the power and economy of the vehicle to which the hybrid power system belongs, and solving the problem that the existing torque distribution based on the power size of the power battery to achieve the adjustment of the engine operating condition is not suitable for all application scenarios.

[0094] Optionally, another embodiment of the present application further provides an engine control device for a hybrid power system, such as Figure 6 As shown, including:

[0095] A determination unit 101 is used to determine a target mode in a preset mode set of an engine, wherein the preset mode set includes a power mode, a fuel-saving mode, and a balance mode, and the power mode, the fuel-saving mode, and the balance mode correspond to different conversion relationships between an engine speed and a cyclic injection amount;

[0096] The control unit 102 is used to control the operation of the engine according to the current engine speed and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode.

[0097] In some embodiments, the specific process of the determination unit 101 for determining the target mode in the preset mode set of the engine includes:

[0098] Determining whether an enabling condition of a power mode or an enabling condition of a fuel-saving mode is met;

[0099] If it is determined that the enabling conditions of the power mode are met, the target mode is determined to be the power mode;

[0100] If it is determined that the enabling condition of the fuel saving mode is met, then determining the target mode to be the fuel saving mode;

[0101] If it is determined that the enabling conditions of the power mode and the enabling conditions of the fuel-saving mode are not met, the target mode is determined to be the balance mode.

[0102] In some embodiments, the enabling conditions of the power mode include: when the battery power of the hybrid system is less than a first power threshold, the vehicle to which the hybrid system belongs has a power mode demand, and / or the slope of the vehicle to which the hybrid system belongs is greater than a preset slope threshold.

[0103] In some embodiments, the enabling conditions of the fuel saving mode include: when the battery power of the hybrid system is greater than a second power threshold, the vehicle to which the hybrid system belongs has no power mode demand, and the slope of the vehicle to which the hybrid system belongs is not greater than a preset slope threshold.

[0104] In some embodiments, if the target mode is the power mode, controlling the engine operation according to the current engine speed and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes:

[0105] Determine the cyclic fuel injection amount corresponding to the current engine speed according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the power mode;

[0106] The determined cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine, and the combustion parameters of the engine are adjusted for the purpose of increasing the external characteristic torque of the engine;

[0107] The combustion parameters of the engine include at least one of the following: a rail pressure of the engine, a main injection angle of the engine, an opening of a supercharger bleed valve of the engine, and a state of a mechanical supercharger clutch of the engine.

[0108] In some embodiments, if the target mode is the fuel saving mode, controlling the engine operation according to the current engine speed and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes:

[0109] Determine the cyclic fuel injection amount corresponding to the current engine speed according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the fuel saving mode;

[0110] The determined cyclic injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine, and the engine is controlled to operate in a preset fuel consumption area for the purpose of improving the economy of the vehicle to which the hybrid power system belongs.

[0111] In some embodiments, if the target mode is the balanced mode, controlling the engine operation according to the current engine speed and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes:

[0112] Determine the cyclic fuel injection amount corresponding to the current engine speed according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the balance mode;

[0113] The determined cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel limit of the engine, and the basic fuel limit of the engine is adjusted in real time according to the battery power of the hybrid system for the purpose of maintaining a relative balance between the economy and power of the vehicle to which the hybrid system belongs.

[0114] The engine control device of the hybrid power system provided in this embodiment includes: a determination unit 101 is used to determine a target mode in a preset mode set of the engine, the preset mode set includes a power mode, a fuel-saving mode and a balance mode, and the power mode, the fuel-saving mode and the balance mode correspond to different engine speed and cyclic injection amount conversion relationships; a control unit 102 is used to control the engine operation according to the current engine speed and the engine speed corresponding to the target mode. The maximum operating condition of the engine can be reasonably adjusted according to the engine being in different modes, thereby improving the power and economy of the vehicle to which the hybrid power system belongs, and solving the problem that the existing torque distribution based on the power size of the power battery to achieve the adjustment of the engine operating condition is not suitable for all application scenarios.

[0115] It should be noted that, for the relevant description of each unit in the engine control device of the hybrid power system, reference can be made to the corresponding method embodiment, which will not be repeated here.

[0116] Optionally, another embodiment of the present application provides an electronic device, such as Figure 7 As shown, including:

[0117] Memory 701 and processor 702 .

[0118] The memory 701 is used to store programs.

[0119] The processor 702 is used to execute the program stored in the memory 701, and when the program is executed, it is specifically used to implement the engine control method of the hybrid power system provided by any one of the above embodiments.

[0120] The electronic devices in this article can be servers, PCs, PADs, mobile phones, ECUs (Electronic Control Units), VCUs (Vehicle Control Units), MCUs (Micro Controller Units), HCUs (Hybrid Control Units), etc.

[0121] It should be noted that the specific implementation process may refer to the implementation method of the engine control method of the hybrid power system provided in the above method embodiment, and will not be repeated here.

[0122] Optionally, another embodiment of the present application provides a computer storage medium for storing a computer program, which, when executed, is used to implement the engine control method of the hybrid power system provided by any one of the above method embodiments.

[0123] It should be noted that the specific implementation process may refer to the implementation method of the engine control method of the hybrid power system provided in the above method embodiment, and will not be repeated here.

[0124] Among them, the computer storage media in the embodiments of the present application include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carriers.

[0125] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0126] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling an engine of a hybrid power system, characterized in that: include: Determining a target mode in a preset mode set of the engine, the preset mode set including a power mode, a fuel-saving mode and a balance mode, the power mode, the fuel-saving mode and the balance mode corresponding to different engine speed and cyclic injection amount conversion relationships; Controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode; If the target mode is the power mode, controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes: Determining the cyclic fuel injection amount corresponding to the current speed of the engine according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the power mode; Using the determined cyclic fuel injection amount corresponding to the current speed of the engine as the basic fuel amount limit of the engine, and adjusting the combustion parameters of the engine for the purpose of increasing the external characteristic torque of the engine; The combustion parameters of the engine include at least one of the following: a rail pressure of the engine, a main injection angle of the engine, an opening of a supercharger bleed valve of the engine, and a state of a mechanical supercharger clutch of the engine.

2. The engine control method of the hybrid power system according to claim 1, characterized in that: Determining a target mode in the preset mode set of the engine includes: Determining whether an enabling condition of the power mode or an enabling condition of the fuel saving mode is satisfied; If it is determined that the enabling condition of the power mode is met, determining that the target mode is the power mode; If it is determined that the enabling condition of the fuel-saving mode is met, determining that the target mode is the fuel-saving mode; If it is determined that the enabling conditions of the power mode and the enabling conditions of the fuel-saving mode are not met, the target mode is determined to be the balance mode.

3. The engine control method of the hybrid power system according to claim 2, characterized in that: The enabling conditions of the power mode include: when the battery power of the hybrid power system is less than a first power threshold, the vehicle to which the hybrid power system belongs has a power mode demand, and / or the slope of the vehicle to which the hybrid power system belongs is greater than a preset slope threshold.

4. The engine control method of the hybrid power system according to claim 2, characterized in that: The enabling conditions of the fuel saving mode include: when the battery power of the hybrid power system is greater than a second power threshold, the vehicle to which the hybrid power system belongs has no power mode demand, and the slope of the vehicle to which the hybrid power system belongs is not greater than a preset slope threshold.

5. The engine control method of the hybrid power system according to claim 1, characterized in that: If the target mode is the fuel saving mode, controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes: Determining the cyclic fuel injection amount corresponding to the current speed of the engine according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the fuel saving mode; The determined cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine, and the engine is controlled to operate in a preset fuel consumption area for the purpose of improving the economy of the vehicle to which the hybrid power system belongs.

6. The engine control method of the hybrid power system according to claim 1, characterized in that: If the target mode is the balanced mode, controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode includes: Determining the cyclic fuel injection amount corresponding to the current speed of the engine according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the balancing mode; The determined cyclic fuel injection amount corresponding to the current speed of the engine is used as the basic fuel amount limit of the engine, and the basic fuel amount limit of the engine is adjusted in real time according to the battery power of the hybrid power system for the purpose of maintaining a relative balance between the economy and power of the vehicle to which the hybrid power system belongs.

7. An engine control device for a hybrid power system, characterized in that: include: a determination unit, configured to determine a target mode in a preset mode set of the engine, wherein the preset mode set includes a power mode, a fuel-saving mode, and a balance mode, wherein the power mode, the fuel-saving mode, and the balance mode correspond to different conversion relationships between engine speed and cyclic injection amount; A control unit, used for controlling the operation of the engine according to the current speed of the engine and the conversion relationship between the engine speed and the cyclic injection amount corresponding to the target mode; If the target mode is the power mode, the control unit is specifically configured to: Determining the cyclic fuel injection amount corresponding to the current speed of the engine according to the conversion relationship between the engine speed and the cyclic fuel injection amount corresponding to the power mode; Using the determined cyclic fuel injection amount corresponding to the current speed of the engine as the basic fuel amount limit of the engine, and adjusting the combustion parameters of the engine for the purpose of increasing the external characteristic torque of the engine; The combustion parameters of the engine include at least one of the following: a rail pressure of the engine, a main injection angle of the engine, an opening of a supercharger bleed valve of the engine, and a state of a mechanical supercharger clutch of the engine.

8. An electronic device, characterized in that: include: Memory and processor; Wherein, the memory is used to store programs; The processor is used to execute the program, and when the program is executed, it is specifically used to implement the engine control method of the hybrid power system according to any one of claims 1 to 6.

9. A computer storage medium, characterized in that: Used to store a computer program, which, when executed, is used to implement the engine control method of the hybrid power system according to any one of claims 1 to 6.

Images