Control method for hybrid power system, hybrid power system, and controller

Abstract

Embodiments of the present application provide a control method for a hybrid power system, a hybrid power system, and a controller. The hybrid power system comprises a through shaft gear pump, wherein the through shaft gear pump comprises a first input end and a second input end, the first input end is connected to a first branch, and the second input end is connected to a second branch. The method comprises: when a first input end of a through shaft gear pump is connected to a first branch, acquiring first output torque of an engine and remaining capacity of a power battery in real time; when the first output torque and the remaining capacity satisfy a first preset condition, controlling a second input end of the through shaft gear pump to be connected to a second branch; and adjusting second output torque of a motor to change the first output torque, so as to improve the fuel consumption rate of the engine. According to the present invention, by introducing the through shaft gear pump comprising the two input ends, flexible matching of the model of the motor is achieved, the cost is effectively reduced, and bidirectional transmission of power of the engine and the motor to the through shaft gear pump is achieved.

Description

Control method for hybrid power system, hybrid power system and controller

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Chinese Patent No. 202311675329.3, filed December 7, 2023, the contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to the technical field of engineering machinery, and in particular to a control method for a hybrid power system, a hybrid power system, a storage medium, and a controller. Background Art

[0004] Against the backdrop of global resource scarcity and worsening environmental pollution in my country, the vigorous development of new energy has become a key focus of industrial development in recent years. Traditional truck cranes utilize their engines not only to propel the vehicle but also, when parked, to operate the hydraulic oil pump via a power take-off (PTO) when connected to a crane's power take-off. When the crane is operating purely fuel-powered, the engine's operating point rarely reaches optimal fuel economy, resulting in poor fuel efficiency. Furthermore, this operation generates significant emissions and noise pollution, contradicting the principles of energy conservation and environmental protection. Purely electric cranes, on the other hand, must balance both driving and loading operations, while also considering the overall vehicle cost. This results in lower range and higher costs.

[0005] To address these issues, existing technologies have proposed hybrid systems using a through-shaft motor or adding a power take-off system to achieve motor-driven oil pump operation. Some hybrid models also implement motor-driven oil pump operation by increasing the number of transmission intermediate shafts. However, in these various configurations, the choice of motor is constrained by the speed ratios of other components, limiting the range of motor options. Furthermore, some hybrid operation modes require additional components, significantly increasing both cost and maintenance.

[0006] Summary of the Invention

[0007] The purpose of the embodiments of the present application is to provide a control method for a hybrid power system to solve the technical defects in the prior art that the model replacement of the motor is limited by the speed ratio of other structural components and the hybrid power system has a high cost.

[0008] To achieve the above objectives, the present application provides, in a first aspect, a control method for a hybrid power system. The hybrid power system includes a through-shaft gear pump, the through-shaft gear pump includes a first input end and a second input end, the first input end is connected to a first branch, the second input end is connected to a second branch, the first branch includes an engine, and the second branch includes a motor and a power battery. The control method includes:

[0009] When the first input end of the through-shaft gear pump is connected to the first branch, a first output torque of the engine and a remaining power of the power battery are obtained in real time;

[0010] When the first output torque and the remaining power meet a first preset condition, controlling the second input end of the through-axis gear pump to be connected to the second branch;

[0011] The second output torque of the motor is adjusted to change the first output torque to improve the fuel consumption rate of the engine.

[0012] In an embodiment of the present application, the first output torque and the remaining power are determined to meet the first preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is greater than the first preset remaining power.

[0013] In an embodiment of the present application, adjusting the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine includes: when the first output torque is less than or equal to the lower limit value of the preset torque range and the remaining power is less than or equal to the first preset remaining power, or when the first output torque is within the preset torque range and the remaining power is less than or equal to the first preset remaining power, controlling the motor to generate electricity and increasing the output negative torque of the motor to increase the first output torque to improve the fuel consumption rate of the engine.

[0014] In an embodiment of the present application, the control method also includes: when the first output torque is greater than the upper limit value of the preset torque range and the remaining power is greater than the first preset remaining power, controlling the power consumption of the generator and increasing the output positive torque of the motor to reduce the first output torque to improve the fuel consumption rate of the engine.

[0015] In an embodiment of the present application, the control method also includes: when the first output torque and the remaining power meet the second preset condition, controlling the second input end of the through-shaft gear pump to be disconnected from the second branch, controlling the motor to be turned off, and controlling the engine to drive the through-shaft gear pump with the first output torque.

[0016] In an embodiment of the present application, the first output torque and the remaining power are determined to meet the second preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is less than the first preset remaining power.

[0017] In an embodiment of the present application, the control method also includes: when the remaining power is greater than a second preset remaining power, performing the following control operations: controlling the second input end of the through-shaft gear pump to be connected to the second branch; controlling the first input end of the through-shaft gear pump to be disconnected from the first branch; controlling the engine to be turned off; controlling the power battery drive motor to drive the through-shaft gear pump with a second output torque.

[0018] A second aspect of the present application provides a controller configured to execute the above-mentioned control method for a hybrid power system.

[0019] A third aspect of the present application provides a hybrid power system, comprising:

[0020] A through-axis gear pump, the through-axis gear pump includes a first input end and a second input end, the first input end is connected to the first branch, and the second input end is connected to the second branch;

[0021] The first branch includes the engine;

[0022] The second branch includes a motor and a power battery, and the motor is connected to the power battery;

[0023] In an embodiment of the present application, the through-shaft gear pump further includes: an input through-shaft gear shaft, including a first input end and a second input end; and a driven gear shaft meshing with the input through-shaft gear shaft.

[0024] In an embodiment of the present application, the through-shaft gear pump also includes: a pump housing, used to fix the input through-shaft gear shaft and the driven gear shaft, and isolate the interior of the through-shaft gear pump from the external environment; a left end cover, fixed to the first end of the pump housing; and a right end cover, fixed to the second end of the pump housing.

[0025] In an embodiment of the present application, the first branch also includes: a plunger pump, the first end of the plunger pump is connected to the engine, the second end of the plunger pump is connected to the through-shaft gear pump, and constitutes an oil pump assembly system with the through-shaft gear pump. The oil pump assembly system is used to connect to the target operating system and transmit the first output torque of the engine to the target operating system.

[0026] In an embodiment of the present application, the second branch also includes: a reducer, the first end of the reducer is connected to the through-shaft gear pump, and the second end of the reducer is connected to the motor, so that the motor, the plunger pump and the through-shaft gear pump constitute an oil pump assembly system coaxially, and the reducer is used to adjust the first speed ratio of the motor. When the reducer adjusts the first speed ratio to reduce the speed of the motor and increase the second output torque of the motor, the output shaft of the reducer is coaxial with the output shaft of the transmission.

[0027] In an embodiment of the present application, the first end of the motor is connected to the through-shaft gear pump, the second end of the motor is connected to the power battery, the motor, the plunger pump and the through-shaft gear pump constitute an oil pump assembly system coaxially, and the motor is used to provide a second output torque.

[0028] In an embodiment of the present application, the first branch also includes: a power take-off, the first end of the power take-off is connected to the engine, and the second end of the power take-off is connected to the plunger pump, for transmitting the output torque provided by the engine to the plunger pump; a clutch, the first end of the clutch is connected to the engine, and the second end of the clutch is connected to the transmission, for connecting the engine and the transmission to prevent the engine from being impacted when the transmission is overloaded; a transmission, the first end of the transmission is connected to the clutch, and the second end of the transmission is connected to the power take-off, for adjusting the second speed ratio of the engine.

[0029] In an embodiment of the present application, when the first input end of the through-shaft gear pump is connected to the first branch and the second input end of the through-shaft gear pump is connected to the second branch, the motor outputs the second output torque and transmits it to the engine through the second branch to adjust the first output torque of the engine, and the through-shaft gear pump transmits the adjusted first output torque to the target operating system through the first branch; when the first input end is connected to the first branch and the second input end is disconnected from the second branch, the through-shaft gear pump transmits the first output torque of the engine to the target operating system through the first branch.

[0030] In an embodiment of the present application, when the second input end of the through-shaft gear pump is connected to the second branch and the first input end of the through-shaft gear pump is disconnected from the first branch, the power battery drives the motor to output a second output torque, and the through-shaft gear pump transmits the second output torque of the motor to the target operating system through the second branch.

[0031] The controller is configured to execute the control method for the hybrid system.

[0032] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon. When the instructions are executed by a controller, the controller is configured to execute the above-mentioned control method for a hybrid power system.

[0033] The above technical solution obtains the first output torque of the engine and the remaining power of the power battery in real time when the first input end of the through-shaft gear pump is connected to the first branch. When the first output torque and the remaining power meet the first preset condition, the second input end of the through-shaft gear pump is controlled to be connected to the second branch, thereby adjusting the second output torque of the motor to change the first output torque, so as to improve the fuel consumption rate of the engine. By introducing a through-shaft gear pump with two input ends, one end of the through-shaft gear pump can be connected to the motor separately, so that the motor model does not need to be restricted by the speed ratio of other structural parts such as the generator when it is replaced, thereby achieving flexible matching of the motor model, and the motor no longer needs to have a separate end cover mold, which can effectively reduce costs. At the same time, the other end of the through-shaft gear pump is connected to the engine, realizing two-way power transmission from the engine and the motor to the through-shaft gear pump.

[0034] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present application but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0036] FIG1A schematically shows a structural block diagram of a first hybrid power system according to an embodiment of the present application;

[0037] FIG1B schematically shows a structural block diagram of a second hybrid power system according to an embodiment of the present application;

[0038] FIG1C schematically shows a structural block diagram of a third hybrid power system according to an embodiment of the present application;

[0039] FIG1D schematically shows a structural block diagram of a fifth hybrid power system according to an embodiment of the present application;

[0040] FIG1E schematically shows a structural block diagram of a sixth hybrid power system according to an embodiment of the present application;

[0041] FIG2 schematically shows a flow chart of a control method for a hybrid power system according to an embodiment of the present application;

[0042] FIG3A schematically shows a structural block diagram of a through-axis gear pump according to an embodiment of the present application;

[0043] FIG3B schematically shows a structural block diagram of another through-axis gear pump according to an embodiment of the present application;

[0044] FIG4 schematically shows an internal structure diagram of a computer device according to an embodiment of the present application.

[0045] Description of Reference Numerals

[0046] 101 Through-axis gear pump 102 Engine

[0047] 103 Motor 104 Power Battery

[0048] 105 Vehicle Controller 106 Plunger Pump

[0049] 107 Speed ​​reducer 108 Power take-off

[0050] 109 Clutch 110 Transmission

[0051] 111 All-in-one Controller

[0052] 310 Input through gear shaft 312 First input end

[0053] 314 Second input end 320 Driven gear shaft

[0054] 330 Pump housing 340 Left end cover

[0055] 360 right end cap DETAILED DESCRIPTION

[0056] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application and are not intended to limit the embodiments of the present application. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present application without making creative efforts are within the scope of protection of this application.

[0057] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0058] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0059] In an embodiment of the present application, as shown in FIG1A , a structural block diagram of a first hybrid power system is provided. Specifically, the hybrid power system includes:

[0060] A through-axis gear pump 101 includes a first input end and a second input end, wherein the first input end is connected to the first branch, and the second input end is connected to the second branch;

[0061] The first branch includes the engine 102;

[0062] The second branch includes a motor 103 and a power battery 104, and the motor 103 is connected to the power battery 104;

[0063] The controller may include a vehicle controller 105 , and the vehicle controller 105 is electrically connected to the first branch, the second branch, and the through-axis gear pump 101 (not shown in the figure).

[0064] An engine is a machine that converts other forms of energy into mechanical energy. In this technical solution, the engine used is an internal combustion engine. Fuel and air are mixed, compressed, and exploded to generate power, converting thermal energy into mechanical energy to drive the vehicle or operate. A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It can act as a motor to drive a hydraulic pump or as a generator to charge a power battery.

[0065] In an embodiment of the present application, as shown in FIG1B , a structural block diagram of a second hybrid power system is provided. Specifically, the first branch of the hybrid power system further includes:

[0066] The plunger pump 106 has a first end connected to the engine 102, and a second end connected to the through-shaft gear pump 101, and together with the through-shaft gear pump 101, it forms an oil pump assembly system, which is used to connect to the target operating system and transmit the first output torque of the engine 102 to the target operating system.

[0067] A plunger pump is a type of water pump and a crucial working component in hydraulic and pneumatic transmissions. It belongs to the category of positive displacement pumps and reciprocating pumps. A plunger pump relies on the reciprocating motion of a plunger within a cylinder, causing the volume of a sealed working chamber to change, thereby achieving oil suction and pressure. Plunger pumps offer advantages such as high rated pressure, compact structure, high efficiency, and easy flow rate regulation. They are widely used in applications requiring high pressure, high flow rates, and those requiring flow rate regulation. In this technical solution, the first end of the plunger pump is connected to the engine, and the second end of the plunger pump is connected to a gear pump. Together, the two components form an oil pump assembly system. The oil pump assembly system can be connected to a target operating system and transmit the engine's first output torque to the target operating system. The target operating system can be a vehicle operating system. The engine's first output torque is transmitted via a first branch of the hybrid power system to the oil pump assembly system connected to the first branch. After receiving the first output torque, the first input end of the input-through gear shaft in the oil pump assembly system applies the first output torque to the vehicle operating system, enabling the vehicle operating system to operate.

[0068] In an embodiment of the present application, the first end of the motor 103 is connected to the through-shaft gear pump 101, the second end of the motor 103 is connected to the power battery 104, the motor 103 and the plunger pump and the through-shaft gear pump 101 constitute an oil pump assembly system coaxially, and the motor 103 is used to provide a second output torque.

[0069] In this technical solution, the hybrid system can choose not to use a speed reducer to connect to the motor, but can choose to use a motor to directly drive the input through-shaft gear pump. Specifically, when using a motor to directly drive the input through-shaft gear pump, the first end of the motor is connected to the input through-shaft gear pump, the second end of the motor is connected to the power battery, the motor and the plunger pump and the input through-shaft gear pump form an oil pump assembly system coaxially, and the motor is used to provide a second output torque. Specifically, the second output torque output by the motor is transmitted to the oil pump assembly system connected to the second branch through the second branch of the hybrid system. After receiving the second output torque, the second input end of the input through-gear shaft in the oil pump assembly system applies the second output torque to the vehicle operation system for the vehicle operation system to operate.

[0070] In an embodiment of the present application, as shown in FIG1C , a structural block diagram of a third hybrid power system is provided. Specifically, the second branch of the hybrid power system further includes:

[0071] The reducer 107 has a first end connected to the through-shaft gear pump 101, and a second end connected to the motor 103, so that the motor 103, the plunger pump 106 and the through-shaft gear pump 101 form an oil pump assembly system that is coaxial. The reducer 107 is used to adjust the first speed ratio of the motor 103. When the reducer 107 adjusts the first speed ratio to reduce the speed of the motor 103 and increase the second output torque of the motor 103, the output shaft of the reducer 107 is coaxial with the output shaft of the transmission 110.

[0072] A reducer is a power transmission mechanism that uses a gear speed converter to reduce the number of revolutions of an electric motor to the desired number of revolutions and obtain a larger torque. The main function of the reducer is to increase the output torque while reducing the speed. The torque output ratio is calculated by multiplying the motor output by the reduction ratio. Specifically, the first end of the reducer is connected to the input through-shaft gear pump, and the second end of the reducer is connected to the motor so that the motor, the plunger pump and the input through-shaft gear pump form an oil pump assembly system that is coaxial. The reducer is used to adjust the first transmission speed ratio of the motor. In this technical solution, the reducer can be freely replaced according to the model of the motor to achieve matching of different motors and reducers, making the hybrid power system more flexible. Furthermore, when the reducer adjusts the first transmission speed ratio to reduce the speed of the motor and increase the second output torque of the motor, the output shaft of the reducer is coaxial with the output shaft of the transmission.

[0073] In an embodiment of the present application, as shown in FIG1D , a structural block diagram of a fifth hybrid power system is provided. Specifically, the first branch of the hybrid power system further includes:

[0074] A power take-off 108 , wherein a first end of the power take-off 108 is connected to the engine 102 , and a second end of the power take-off 108 is connected to the plunger pump 106 , for transmitting the output torque provided by the engine 102 to the plunger pump 106 ;

[0075] A clutch 109 , wherein a first end of the clutch 109 is connected to the engine 102 , and a second end of the clutch 109 is connected to the transmission 110 , for connecting the engine 102 and the transmission 110 to prevent the transmission 110 from impacting the engine 102 when overloaded;

[0076] The transmission 110 has a first end connected to the clutch 109 and a second end connected to the power take-off 108 , for adjusting a second transmission ratio of the engine 102 .

[0077] A power take-off is a group or multiple groups of speed-changing gears, also known as a power output device. It is generally composed of a gearbox, a clutch, and a controller. It is connected to the low-speed gear of the transmission or the output shaft of the auxiliary box to output power to an external working device, such as a lifting pump. In this technical solution, the power take-off can transmit the first output torque of the engine to the input through-shaft gear pump. Specifically, the first end of the power take-off is connected to the engine, and the second end of the power take-off is connected to the plunger pump. After the engine outputs the first output torque, the power take-off outputs the first output torque and transmits it to the oil pump assembly system connected to the first branch through the first branch of the hybrid power system. After receiving the first output torque, the first input end of the input through-gear shaft in the oil pump assembly system applies the first output torque to the vehicle operation system for operation of the vehicle operation system.

[0078] The clutch is a device installed between the driving shaft and the driven shaft, located in the flywheel housing between the engine and the gearbox, and is used to separate and engage the rotational motion of the driving shaft and the driven shaft. The output shaft of the clutch is the input shaft of the gearbox. The clutch can temporarily separate or gradually engage the engine and the gearbox to cut off or transfer the power input from the engine to the transmission. The clutch is a commonly used component in mechanical transmission and can separate or engage the transmission system at any time. It can have functions such as starting, stopping, reversing, and changing speed in the transmission system, and can also play an overload protection role for the machine. Specifically, in this technical solution, the first end of the clutch is connected to the engine, and the second end of the clutch is connected to the transmission, which is used to connect the engine and the transmission to prevent the transmission from impacting the engine when it is overloaded, causing damage to the engine.

[0079] A transmission, also known as a gearbox, is a gear transmission that can change the transmission ratio between the output and input shafts in fixed or variable steps. It consists of a transmission mechanism and a speed change mechanism. The speed change mechanism can be a separate mechanism or integrated into the same housing as the transmission mechanism. The transmission mechanism typically uses a conventional gear drive or a planetary gear drive. Conventional gear transmissions typically utilize sliding gears and clutches. Sliding gears can be divided into multi-link sliding gears and variable-position sliding gears. Triple-link sliding gears offer large axial dimensions, while variable-position sliding gears offer a compact structure but a smaller gear ratio variation. Transmissions are widely used in machine tools, vehicles, and other machinery requiring speed changes. Machine tool spindles are often housed within transmissions, also known as spindle boxes. Their compact structure facilitates centralized operation. Transmissions used to change feed rates on machine tools are called feed boxes. Specifically, in this technical solution, the first end of the transmission is connected to the clutch, and the second end is connected to the power take-off, allowing for adjustment of the engine's second transmission ratio.

[0080] In an embodiment of the present application, when the first input end of the through-shaft gear pump 101 is connected to the first branch and the second input end of the through-shaft gear pump 101 is connected to the second branch, the motor 103 outputs the second output torque and transmits it to the engine 102 through the second branch to adjust the first output torque of the engine, and the through-shaft gear pump 101 transmits the adjusted first output torque to the target operating system through the first branch; when the first input end is connected to the first branch and the second input end is disconnected from the second branch, the through-shaft gear pump 101 transmits the first output torque of the engine 102 to the target operating system through the first branch.

[0081] In an embodiment of the present application, as shown in Figure 1E, a structural block diagram of a sixth hybrid power system is provided. Specifically, the controller may also include an all-in-one controller 111, the vehicle controller 105 is electrically connected to the all-in-one controller 111 (not shown in the figure), and the all-in-one controller 111 is electrically connected to the motor 103 and the dynamic battery 104.

[0082] When the hybrid system enters the electric drive mode in which the through-axis gear pump is driven by the power battery, if the remaining power of the power battery is lower than a second preset remaining power, an external power source, such as mains power, is connected to charge the power battery. The second preset remaining power may refer to a value corresponding to when the power battery is fully charged. In the present technical solution, the second preset remaining power may be set to 80%. When the remaining power is lower than 80%, an external power source, such as mains power, is connected to charge the power battery.

[0083] The first output torque of the engine and the remaining power of the power battery affect the fuel consumption rate of the engine. In order to improve the fuel consumption rate of the engine, when the first input end of the input through-shaft gear pump is connected to the first branch and the second input end of the input through-shaft gear pump is connected to the second branch, the motor outputs the second output torque and transmits it to the engine through the second branch to adjust the first output torque of the engine, and the input through-shaft gear pump transmits the adjusted first output torque to the target operating system through the first branch. At this time, the first output torque of the engine is adjusted by outputting the second output torque of the motor, thereby achieving the purpose of improving the fuel consumption rate of the engine. When the first input end of the input through-shaft gear pump is connected to the first branch and the second input end of the input through-shaft gear pump is disconnected from the second branch, the input through-shaft gear pump transmits the first output torque of the engine to the target operating system through the first branch.

[0084] In an embodiment of the present application, when the second input end of the through-shaft gear pump 101 is connected to the second branch and the first input end of the through-shaft gear pump 101 is disconnected from the first branch, the power battery 104 drives the motor 103 to output a second output torque, and the through-shaft gear pump 101 transmits the second output torque of the motor 103 to the target operating system through the second branch.

[0085] Figure 2 schematically shows a flow chart of a control method for a hybrid power system according to an embodiment of the present application. As shown in Figure 2 , an embodiment of the present application provides a control method for a hybrid power system, which may include the following steps.

[0086] Step 201: When the first input end of the through-shaft gear pump is connected to the first branch, obtain the first output torque of the engine and the remaining power of the power battery in real time.

[0087] In the embodiments of the present application, a gear pump refers to a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure. The through-shaft is an important component for connecting the engine and the transmission device. The through-shaft can effectively transmit the torque generated by the engine to the transmission device. The through-shaft gear pump provided in this technical solution includes gear shafts that are parallel to each other in the gear pump body, and its input shaft gear shaft is designed as a through-shaft. By replacing the existing gear pump driven gear shaft and sealing end cover with the gear pump input shaft and input end cover, the two-way input of the gear pump can be quickly realized, and the input of the oil pump system assembly including the through-shaft gear pump can be increased.

[0088] Specifically, as shown in Figures 3A and 3B, two through-shaft gear pumps are provided. In Figure 3B, the through-shaft gear pump includes two gear-linked input through-shaft gear shafts, namely the first input through-shaft gear shaft, i.e., input shaft 1 in Figure 3B, and the second input through-shaft gear shaft, i.e., input shaft 2 in Figure 3B, wherein the first input through-shaft gear shaft includes a first input end, i.e., input end 1 in Figure 3B, and the second input through-shaft gear shaft includes a second input end, i.e., input end 2 in Figure 3B. In Figure 3A, the through-shaft gear pump includes: an input through-shaft gear shaft 310, including a first input end 321 and a second input end 314; and a driven gear shaft 320, which is meshed with the input through-shaft gear shaft 210.

[0089] The gear shafts parallel to each other in the pump body of the input through-shaft gear pump include an input through-shaft gear shaft and a driven gear shaft meshing with the input through-shaft gear shaft. The input through-shaft gear shaft includes a first input end located on the first side of the input through-shaft gear pump and a second input end located on the second side of the input through-shaft gear pump. It should be understood that the input through-shaft gear shaft is a straight through-shaft, and therefore, the first end and the second end of the input through-shaft gear shaft can be symmetrically located on the first side and the second side of the input through-shaft gear pump, respectively. The first input end and the second input end are each connected to a power branch for transmitting the power delivered by the connected power branch to the input through-shaft gear shaft. The driven gear shaft meshes with the input through-shaft gear shaft to form the overall mechanical structure of the input through-shaft gear pump. When the input through-shaft gear shaft is driven by the power delivered by the first input end and / or the second input end, it can drive the meshing driven gear shafts.

[0090] In an embodiment of the present application, the through-shaft gear pump also includes: a pump housing 330, used to fix the input through-shaft gear shaft 310 and the driven gear shaft 320, and isolate the interior of the through-shaft gear pump from the external environment; a left end cover 340, fixed to the first end of the pump housing 330; and a right end cover 360, fixed to the second end of the pump housing 330.

[0091] A pump housing is a protective housing for a pump. Common pump housings are used to isolate the pumped medium from the atmosphere, preventing leakage and maintaining the internal pressure of the pump. Specifically, in this technical solution, the pump housing of the input through-shaft gear pump is used to secure the input through-shaft gear shaft and the driven gear shaft, isolating the interior of the input through-shaft gear pump from the external environment. This prevents splashing and leakage of the liquid during the delivery process when the input through-shaft gear shaft delivers power through the first input end and / or the second input end. Specifically, the pump housing also includes a left end cap secured to the first end of the pump housing and a right end cap secured to the second end of the pump housing. The left and right end caps can be used to protect the first input end of the input through-shaft gear shaft located on the first side of the input through-shaft gear pump and the second input end of the input through-shaft gear shaft located on the second side of the input through-shaft gear pump. Both the left and right end caps can be opened to facilitate replacement of the input through-shaft gear shaft and the driven gear shaft. In this technical solution, the through-shaft gear pump in FIG. 3A can be applied to the hybrid power system shown in FIG. 1 . Specifically, the first input end of the through-axis gear pump is connected to the first branch of the hybrid power system, and the second input end of the through-axis gear pump is connected to the second branch of the hybrid power system. When the first input end of the through-axis gear pump is connected to the first branch, the controller obtains the first output torque of the engine and the remaining power of the power battery in real time. Among them, torque is a special moment that causes an object to rotate. The torque of the engine refers to the torque output by the engine from the crankshaft end. Under the condition of fixed power, it is inversely proportional to the engine speed. The faster the speed, the smaller the torque, and vice versa. In this technical solution, the engine output torque can act on the through-axis gear pump to provide power for the through-axis gear pump. The remaining power of the battery is SOC, which refers to the state of charge. It is used to reflect the remaining capacity of the battery. Its numerical value is defined as the ratio of the remaining capacity to the battery capacity, and is usually expressed as a percentage. It should be understood that the battery SOC cannot be measured directly and can only be estimated through parameters such as the battery terminal voltage, charge and discharge current, and internal resistance.

[0092] Step 202 : When the first output torque and the remaining power satisfy a first preset condition, control the second input end of the through-axis gear pump to be connected to the second branch.

[0093] In an embodiment of the present application, after obtaining the first output torque of the engine and the remaining power of the power battery in real time, the controller can determine the engine's fuel consumption rate based on the magnitude of the first output torque and the magnitude of the remaining power. Specifically, if the first output torque and the remaining power meet a first preset condition, it can be determined that the engine's fuel consumption rate is low. The controller controls the second input end of the through-shaft gear pump to connect to the second branch of the hybrid power system, thereby connecting the electric motor and improving the engine's fuel consumption rate through the electric motor.

[0094] In an embodiment of the present application, the first output torque and the remaining power are determined to meet the first preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is greater than the first preset remaining power.

[0095] In this technical solution, the preset torque range is determined by the engine model, wherein the preset torque range includes a lower limit and an upper limit. The first preset remaining power can refer to the safe power level of the power battery. When the remaining power level is lower than the safe power level, continued use of the power battery will reduce its activity, which will eventually affect its service life. Therefore, the first preset remaining power can be regarded as the triggering power level of the power battery's self-protection mechanism. Taking a mobile phone battery as an example, when the battery level reaches 20%, the phone will automatically prompt whether to enter low power mode to reduce power consumption. Therefore, in this technical solution, the first preset remaining power can be set to 20%. The first output torque and remaining power can be determined to meet the first preset condition if any of the following conditions are met. Specifically, there are three situations. The first situation is: the first output torque is less than or equal to the lower limit of the preset torque range, and the remaining power is less than or equal to the first preset remaining power. Specifically, this can refer to the lower limit of the first output torque range of the engine, and the power battery SOC value is less than or equal to 20%. The second case: the first output torque is within the preset torque range, and the remaining power is less than or equal to the first preset remaining power. Specifically, this may refer to when the first output torque of the engine is within the torque range, and the power battery SOC value is less than or equal to 20%. The third case: the first output torque is greater than the upper limit of the preset torque range, and the remaining power is greater than the first preset remaining power. Specifically, this may refer to when the first output torque of the engine is greater than the upper limit of the torque range, and the power battery SOC value is greater than 20%.

[0096] Step 203: Adjust the second output torque of the motor to change the first output torque, so as to improve the fuel consumption rate of the engine.

[0097] In an embodiment of the present application, after the controller obtains the first output torque of the engine and the remaining power of the power battery in real time, it can determine the fuel consumption rate of the engine based on the magnitude of the first output torque and the magnitude of the remaining power. When the first output torque and the remaining power meet a first preset condition, it can be determined that the fuel consumption rate of the engine is low. At this time, the controller needs to control the second input end of the through-shaft gear pump to be connected to the second branch of the hybrid power system, thereby increasing the fuel consumption rate of the engine by connecting the motor. Specifically, the controller can change the first output torque by adjusting the second output torque of the motor to increase the fuel consumption rate of the engine.

[0098] In an embodiment of the present application, adjusting the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine includes: when the first output torque is less than or equal to the lower limit value of the preset torque range and the remaining power is less than or equal to the first preset remaining power, or when the first output torque is within the preset torque range and the remaining power is less than or equal to the first preset remaining power, controlling the motor to generate electricity and increasing the output negative torque of the motor to increase the first output torque to improve the fuel consumption rate of the engine.

[0099] In this technical solution, the first preset condition includes three scenarios. Specifically, in the first scenario, when the engine's first output torque is less than or equal to the lower limit of the torque range and the power battery SOC is less than or equal to 20%, the controller controls the motor to start and generate electricity, acting as an engine load. At this point, the motor outputs negative torque. The controller controls the motor's negative torque output to increase, thereby increasing the engine's first output torque and ensuring it reaches the preset torque range but does not exceed the upper limit of the preset torque range, thereby improving the engine's fuel consumption. Simultaneously, the power generated by the motor is output to the power battery to charge it. In the second scenario, when the engine's first output torque is within the torque range and the power battery SOC is less than or equal to 20%, the controller controls the motor to start and generate electricity, resulting in negative torque. The controller controls the motor's negative torque output to increase, thereby increasing the engine's first output torque and ensuring it does not exceed the upper limit of the preset torque range, thereby improving the engine's fuel consumption. When the motor acts as a load, the engine transmits the increased first output torque to the power take-off through the clutch and the transmission. The power take-off is connected to the drive shaft and transmits power to the plunger pump in the oil pump assembly system. The plunger pump transmits power to the through-shaft gear pump through the first input end of the through-shaft gear pump, thereby driving the through-shaft gear pump to provide power for the on-vehicle operating system.

[0100] In an embodiment of the present application, the control method also includes: when the first output torque is greater than the upper limit value of the preset torque range and the remaining power is greater than the first preset remaining power, controlling the power consumption of the generator and increasing the output positive torque of the motor to reduce the first output torque to improve the fuel consumption rate of the engine.

[0101] In this technical solution, for the third scenario under the first preset condition, when the engine's first output torque is greater than the upper limit of the torque range and the power battery's SOC is greater than 20%, the controller controls the motor to start and use electricity. The motor consumes power from the power battery to provide power. At this point, the motor outputs positive torque, and the controller controls the motor's output positive torque to increase to reduce the engine's first output torque and bring it within the preset torque range, thereby improving the engine's fuel consumption. When the motor is using electricity, the engine transmits the reduced first output torque through the clutch and transmission to the power take-off. The power take-off is connected to the drive shaft and transmits power to the plunger pump in the oil pump assembly system. The plunger pump transmits power to the through-shaft gear pump via its first input. Simultaneously, the motor, driven by the power battery, outputs positive torque through the reducer and transmits power to the through-shaft gear pump via its second input. This drives the through-shaft gear pump, powered by the engine and motor, to provide power to the vehicle's onboard operating system.

[0102] The above technical solution introduces a through-axis gear pump with two input ports. One end of the through-axis gear pump can be connected to the motor independently, allowing the motor model to be replaced without being restricted by the speed ratio of other structural components such as the generator. This allows for flexible matching of motor models and eliminates the need for a separate end cap mold for the motor, effectively reducing costs. At the same time, the other end of the through-axis gear pump is connected to the engine, enabling bidirectional power transmission from the engine and motor to the through-axis gear pump.

[0103] In an embodiment of the present application, the control method also includes: when the first output torque and the remaining power meet the second preset condition, controlling the second input end of the through-shaft gear pump to be disconnected from the second branch, controlling the motor to be turned off, and controlling the engine to drive the through-shaft gear pump with the first output torque.

[0104] After obtaining the first output torque of the engine and the remaining power of the power battery in real time, the controller can determine the engine's fuel consumption rate based on the magnitude of the first output torque and the magnitude of the remaining power. When the first output torque and the remaining power meet a second preset condition, it can be determined that the engine's fuel consumption rate meets actual requirements. At this time, the controller must control the second input terminal of the through-axis gear pump to disconnect from the second branch of the hybrid power system, control the motor to shut down, and control the engine to drive the through-axis gear pump at the first output torque.

[0105] In an embodiment of the present application, the first output torque and the remaining power are determined to meet the second preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is less than the first preset remaining power.

[0106] In the present technical solution, the first preset remaining power can be set to 20%. When any one of the following conditions is met, it can be determined that the first output torque and the remaining power meet the second preset condition. Specifically, it can include three situations. The first situation: the first output torque is less than or equal to the lower limit of the preset torque range, and the remaining power is greater than the first preset remaining power. Specifically, it can refer to the first output torque of the engine being less than or equal to the lower limit of the torque range, and the power battery SOC is greater than 20%. The second situation: the first output torque is within the preset torque range, and the remaining power is greater than the first preset remaining power. Specifically, it can refer to when the first output torque of the engine is in the torque range, and the power battery SOC value is greater than 20%. The third situation: the first output torque is greater than the upper limit of the preset torque range, and the remaining power is less than the first preset remaining power. Specifically, it can refer to the first output torque of the engine being greater than the upper limit of the torque range, and the power battery SOC value is less than 20%.

[0107] In an embodiment of the present application, the control method also includes: when the remaining power is greater than a second preset remaining power, performing the following control operations: controlling the second input end of the through-shaft gear pump to be connected to the second branch; controlling the first input end of the through-shaft gear pump to be disconnected from the first branch; controlling the engine to be turned off; controlling the power battery drive motor to drive the through-shaft gear pump with a second output torque.

[0108] The second preset remaining power may refer to the corresponding value when the power of the power battery is in a sufficient state. In the present technical solution, the second preset remaining power may be set to 80%. When the remaining power reaches 80%, at this time, the hybrid power system enters the electric drive mode of driving the through-shaft gear pump through the power battery. Specifically, the controller controls the second input end of the through-shaft gear pump to be connected to the second branch, and controls the first input end of the through-shaft gear pump to be disconnected from the first branch, while controlling the engine to shut down, and controlling the power battery to drive the motor to drive the through-shaft gear pump with the second output torque. Among them, when the hybrid power system is in electric drive mode and the remaining power of the power battery is less than 80%, an external power source such as mains power is connected to charge the power battery.

[0109] This technical solution, through a through-shaft gear pump with two input ends, achieves bidirectional power transmission from the engine and motor to the through-shaft gear pump without changing the original transmission route. At the same time, the through-shaft gear pump provided in this technical solution can quickly achieve bidirectional input to the gear pump by replacing the gear pump's driven gear shaft and sealing end cover with the gear pump's input shaft and input end cover. The drive motor does not require a separate end cover mold, reducing the cost of the entire oil pump and motor assembly. In a hybrid system, the input shaft at the other end of the gear pump can be driven by the motor and reducer, enabling the matching of different motors and reducers, making the system more flexible.

[0110] The hybrid power system provided by the present invention, which includes a through-shaft gear pump, can use the motor as a load to generate electricity when the vehicle is in operation, thereby optimizing the operating point distribution of the engine and improving fuel economy.

[0111] An embodiment of the present application provides a storage medium having a program stored thereon, which implements the above-mentioned control method for a hybrid power system when executed by a controller.

[0112] An embodiment of the present application provides a controller, which is used to run a program, wherein the program executes the above-mentioned control method for the hybrid power system when it is run.

[0113] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in FIG4 . The computer device includes a controller A01, a network interface A02, a memory (not shown in the figure), and a database (not shown in the figure) connected via a system bus. The controller A01 of the computer device is used to provide computing and control capabilities. The memory of the computer device includes an internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02, and a database (not shown in the figure). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 in the non-volatile storage medium A04. The database of the computer device is used to store control method data for a hybrid power system. The network interface A02 of the computer device is used to communicate with an external terminal via a network connection. When the computer program B02 is executed by the controller A01, a control method for a hybrid power system is implemented.

[0114] Those skilled in the art will understand that the structure shown in FIG4 is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0115] An embodiment of the present application provides a device, which includes a controller, a memory, and a program stored in the memory and executable on the controller. When the controller executes the program, the following steps are implemented: when the first input end of the through-shaft gear pump is connected to the first branch, the first output torque of the engine and the remaining power of the power battery are obtained in real time; when the first output torque and the remaining power meet a first preset condition, the second input end of the through-shaft gear pump is controlled to be connected to the second branch; and the second output torque of the motor is adjusted to change the first output torque to improve the fuel consumption rate of the engine.

[0116] In one embodiment, the first output torque and the remaining power are determined to meet the first preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is greater than the first preset remaining power.

[0117] In one embodiment, adjusting the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine includes: when the first output torque is less than or equal to the lower limit of the preset torque range and the remaining power is less than or equal to the first preset remaining power, or when the first output torque is within the preset torque range and the remaining power is less than or equal to the first preset remaining power, controlling the motor to generate electricity and increasing the output negative torque of the motor to increase the first output torque to improve the fuel consumption rate of the engine.

[0118] In one embodiment, the control method also includes: when the first output torque is greater than the upper limit value of the preset torque range and the remaining power is greater than the first preset remaining power, controlling the power consumption of the generator and increasing the output positive torque of the motor to reduce the first output torque to improve the fuel consumption rate of the engine.

[0119] In one embodiment, the control method also includes: when the first output torque and the remaining power meet the second preset condition, controlling the second input end of the through-shaft gear pump to be disconnected from the second branch, controlling the motor to be turned off, and controlling the engine to drive the through-shaft gear pump with the first output torque.

[0120] In one embodiment, the first output torque and the remaining power are determined to meet the second preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is less than the first preset remaining power.

[0121] In one embodiment, the control method also includes: when the remaining power is greater than a second preset remaining power, performing the following control operations: controlling the second input end of the through-shaft gear pump to be connected to the second branch; controlling the first input end of the through-shaft gear pump to be disconnected from the first branch; controlling the engine to be turned off; controlling the power battery drive motor to drive the through-shaft gear pump with a second output torque.

[0122] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having the following method steps: when the first input end of the through-shaft gear pump is connected to the first branch, obtaining the first output torque of the engine and the remaining power of the power battery in real time; when the first output torque and the remaining power meet a first preset condition, controlling the second input end of the through-shaft gear pump to be connected to the second branch; adjusting the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine.

[0123] In one embodiment, the first output torque and the remaining power are determined to meet the first preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is less than or equal to the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is greater than the first preset remaining power.

[0124] In one embodiment, adjusting the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine includes: when the first output torque is less than or equal to the lower limit of the preset torque range and the remaining power is less than or equal to the first preset remaining power, or when the first output torque is within the preset torque range and the remaining power is less than or equal to the first preset remaining power, controlling the motor to generate electricity and increasing the output negative torque of the motor to increase the first output torque to improve the fuel consumption rate of the engine.

[0125] In one embodiment, the control method also includes: when the first output torque is greater than the upper limit value of the preset torque range and the remaining power is greater than the first preset remaining power, controlling the power consumption of the generator and increasing the output positive torque of the motor to reduce the first output torque to improve the fuel consumption rate of the engine.

[0126] In one embodiment, the control method also includes: when the first output torque and the remaining power meet the second preset condition, controlling the second input end of the through-shaft gear pump to be disconnected from the second branch, controlling the motor to be turned off, and controlling the engine to drive the through-shaft gear pump with the first output torque.

[0127] In one embodiment, the first output torque and the remaining power are determined to meet the second preset condition when any one of the following is met: the first output torque is less than or equal to the lower limit value of the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is within the preset torque range, and the remaining power is greater than the first preset remaining power; the first output torque is greater than the upper limit value of the preset torque range, and the remaining power is less than the first preset remaining power.

[0128] In one embodiment, the control method also includes: when the remaining power is greater than a second preset remaining power, performing the following control operations: controlling the second input end of the through-shaft gear pump to be connected to the second branch; controlling the first input end of the through-shaft gear pump to be disconnected from the first branch; controlling the engine to be turned off; controlling the power battery drive motor to drive the through-shaft gear pump with a second output torque.

[0129] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0130] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a controller of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the controller of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0131] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0132] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0133] In a typical configuration, a computing device includes one or more controllers (CPUs), input / output interfaces, network interfaces, and memory.

[0134] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0135] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules 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, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic 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 transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0136] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0137] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A control method for a hybrid power system, characterized in that: The hybrid power system includes a through-shaft gear pump, the through-shaft gear pump includes a first input end and a second input end, the first input end is connected to a first branch, the second input end is connected to a second branch, the first branch includes an engine, the second branch includes a motor and a power battery, and the control method includes: When the first input end of the through-shaft gear pump is connected to the first branch, a first output torque of the engine and a remaining power of the power battery are obtained in real time; When the first output torque and the remaining power satisfy a first preset condition, controlling the second input end of the through-axis gear pump to be connected to the second branch; The second output torque of the motor is adjusted to change the first output torque to improve the fuel consumption rate of the engine.

2. The control method for a hybrid power system according to claim 1, characterized in that: When any one of the following conditions is met, it is determined that the first output torque and the remaining power meet a first preset condition: The first output torque is less than or equal to a lower limit of a preset torque range, and the remaining power is less than or equal to a first preset remaining power; The first output torque is within the preset torque range, and the remaining power is less than or equal to the first preset remaining power; The first output torque is greater than an upper limit value of the preset torque range, and the remaining power is greater than the first preset remaining power.

3. The control method for a hybrid power system according to claim 1, characterized in that: Adjusting the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine includes: When the first output torque is less than or equal to the lower limit of the preset torque range and the remaining power is less than or equal to the first preset remaining power, or when the first output torque is within the preset torque range and the remaining power is less than or equal to the first preset remaining power, the motor is controlled to generate electricity, and the output negative torque of the motor is increased to increase the first output torque, so as to improve the fuel consumption rate of the engine.

4. The control method for a hybrid power system according to claim 3, characterized in that: The control method further comprises: When the first output torque is greater than the upper limit of the preset torque range and the remaining power is greater than the first preset remaining power, the power consumption of the generator is controlled, and the output positive torque of the motor is increased to reduce the first output torque, so as to improve the fuel consumption rate of the engine.

5. The control method for a hybrid power system according to claim 1, characterized in that: The control method further comprises: When the first output torque and the remaining power meet the second preset condition, the second input end of the through-shaft gear pump is controlled to be disconnected from the second branch, the motor is controlled to be turned off, and the engine is controlled to drive the through-shaft gear pump with the first output torque.

6. The control method for a hybrid power system according to claim 5, characterized in that: When any one of the following conditions is met, it is determined that the first output torque and the remaining power meet a second preset condition: The first output torque is less than or equal to a lower limit of a preset torque range, and the remaining power is greater than a first preset remaining power; The first output torque is within the preset torque range, and the remaining power is greater than the first preset remaining power; The first output torque is greater than an upper limit value of the preset torque range, and the remaining power is less than the first preset remaining power.

7. The control method for a hybrid power system according to claim 1, characterized in that: The control method further comprises: When the remaining power is greater than the second preset remaining power, the following control operations are performed: Controlling the second input end of the through-axis gear pump to communicate with the second branch; Controlling the first input end of the through-axis gear pump to be disconnected from the first branch; Controlling the engine to shut down; The power battery is controlled to drive the motor to drive the through-shaft gear pump with the second output torque.

8. A controller, characterized in that: The method is configured to execute the control method for a hybrid power system according to any one of claims 1 to 7.

9. A hybrid power system, characterized in that: include: A through-axis gear pump, the through-axis gear pump comprising a first input end and a second input end, the first input end is connected to a first branch, and the second input end is connected to a second branch; The first branch includes an engine; The second branch includes a motor and a power battery, and the motor is connected to the power battery; A controller according to claim 8.

10. The hybrid power system according to claim 9, characterized in that: The through-axis gear pump also includes: An input through gear shaft, comprising the first input end and the second input end; The driven gear shaft meshes with the input through gear shaft.

11. The hybrid power system according to claim 10, characterized in that: The through-axis gear pump also includes: A pump housing, used to fix the input through-shaft gear shaft and the driven gear shaft, and to isolate the interior of the through-shaft gear pump from the external environment; a left end cover, fixed to the first end of the pump housing; The right end cover is fixed to the second end of the pump housing.

12. The hybrid power system according to claim 10, characterized in that: The first branch further includes: A plunger pump, wherein the first end of the plunger pump is connected to the engine, the second end of the plunger pump is connected to a through-shaft gear pump, and together with the through-shaft gear pump, an oil pump assembly system is formed, wherein the oil pump assembly system is used to connect to a target operating system and transmit the first output torque of the engine to the target operating system.

13. The hybrid power system according to claim 12, characterized in that: The second branch further includes: A reducer, wherein the first end of the reducer is connected to the through-shaft gear pump, and the second end of the reducer is connected to the motor so that the motor, the plunger pump and the through-shaft gear pump constitute an oil pump assembly system that is coaxial, and the reducer is used to adjust the first speed ratio of the motor. When the reducer adjusts the first speed ratio to reduce the rotational speed of the motor and increase the second output torque of the motor, the output shaft of the reducer is coaxial with the output shaft of the transmission.

14. The hybrid power system according to claim 12, characterized in that: The first end of the motor is connected to the through-shaft gear pump, the second end of the motor is connected to the power battery, the motor, the plunger pump and the through-shaft gear pump form an oil pump assembly system that is coaxial, and the motor is used to provide a second output torque.

15. The hybrid power system according to claim 12, characterized in that: The first branch further includes: A power take-off, wherein a first end of the power take-off is connected to the engine, and a second end of the power take-off is connected to the plunger pump, for transmitting the output torque provided by the engine to the plunger pump; A clutch, wherein a first end of the clutch is connected to the engine, and a second end of the clutch is connected to the transmission, and is used to connect the engine and the transmission to prevent the transmission from impacting the engine when overloaded; The transmission, wherein the first end of the transmission is connected to the clutch, and the second end of the transmission is connected to the power take-off, is used to adjust the second transmission ratio of the engine.

16. The hybrid power system according to claim 12, characterized in that: When the first input end of the through-shaft gear pump is connected to the first branch and the second input end of the through-shaft gear pump is connected to the second branch, the motor outputs a second output torque and transmits it to the engine through the second branch to adjust the first output torque of the engine, and the through-shaft gear pump transmits the adjusted first output torque to the target operating system through the first branch; When the first input end is connected to the first branch and the second input end is disconnected from the second branch, the through-shaft gear pump transmits the first output torque of the engine to the target operating system through the first branch.

17. The hybrid power system according to claim 12, characterized in that: When the second input end of the through-shaft gear pump is connected to the second branch and the first input end of the through-shaft gear pump is disconnected from the first branch, the power battery drives the motor to output a second output torque, and the through-shaft gear pump transmits the second output torque of the motor to the target operating system through the second branch.

18. A machine-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by a controller, the controller is configured to execute the control method for a hybrid power system according to any one of claims 1 to 7.

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