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

Abstract

The embodiment of the present application provides a control method, a hybrid power system and a controller 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 the first branch, and the second input end is connected to the second branch. The method includes: 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 the first preset condition, the second input end of the through-shaft gear pump is controlled 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. The present invention realizes flexible matching of motor models, effectively reduces costs, and realizes two-way power transmission from the engine and the motor to the through-shaft gear pump by introducing a through-shaft gear pump including two input ends.

Description

Technical Field

[0001] The present application 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

[0002] Under the background of the scarcity of resources in the world and the increasing environmental pollution in my country, vigorously developing new energy has become one of the main directions of industrial development in recent years. Traditional truck cranes use engines not only to drive the vehicle, but also to drive the vehicle loading operation by connecting the power take-off device when the vehicle is parked. When the crane is in pure fuel operation, the engine's operating point is difficult to be in the optimal fuel economy zone, and the fuel economy is poor. At the same time, pure fuel operation has greater emission pollution and noise pollution, which is contrary to the theme of energy saving and environmental protection. Pure electric cranes need to take into account both driving and loading operations, as well as the cost of the entire vehicle. The entire vehicle has the disadvantages of low mileage and high cost.

[0003] In response to the above problems, the prior art proposes a dual-purpose oil-electric system using a through-shaft motor, or by adding a power take-off box system to achieve the function of the motor driving the on-board oil pump. Some hybrid models also increase the number of transmission intermediate shafts to achieve the function of the motor operating the on-board oil pump. However, in the above various structures, the selection of motors is constrained by the speed ratio of other structural parts, resulting in a limited range of motor selection. At the same time, some on-board hybrid operation modes require the addition of components separately, which greatly increases the cost and maintenance costs. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a control method for a hybrid power system, so as 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 parts and the hybrid power system has a high cost.

[0005] In order to achieve the above-mentioned object, the first aspect of the present application provides 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:

[0006] 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;

[0007] When the first output torque and the remaining power meet the first preset condition, controlling the second input end of the through-shaft gear pump to be connected to the second branch;

[0008] The second output torque of the motor is adjusted to change the first output torque to improve the fuel consumption rate of the engine.

[0009] 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.

[0010] 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 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] A second aspect of the present application provides a controller configured to execute the above-mentioned control method for a hybrid power system.

[0016] A third aspect of the present application provides a hybrid power system, comprising:

[0017] A through-axis gear pump, the through-axis gear pump comprises 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;

[0018] The first branch includes the engine;

[0019] The second branch includes a motor and a power battery, and the motor is connected to the power battery;

[0020] 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.

[0021] 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.

[0022] 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, and 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.

[0023] In an embodiment of the present application, the second branch also includes: a reducer, a first end of the reducer is connected to the through-shaft gear pump, and a 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.

[0024] 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 is coaxial with the plunger pump and the through-shaft gear pump to form an oil pump assembly system, and the motor is used to provide a second output torque.

[0025] In an embodiment of the present application, the first branch also includes: a power take-off, 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, a first end of the clutch is connected to the engine, and a 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, a first end of the transmission is connected to the clutch, and a second end of the transmission is connected to the power take-off, for adjusting the second speed ratio of the engine.

[0026] 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.

[0027] 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.

[0028] The controller is configured to execute the control method for the hybrid power system.

[0029] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, which, when executed by a controller, configures the controller to execute the above-mentioned control method for a hybrid power system.

[0030] 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, and controls the second input end of the through-shaft gear pump to be connected to the second branch when the first output torque and the remaining power meet the first preset condition, 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 including two input ends, one end of the through-shaft gear pump can be connected to the motor alone, 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, and the motor model is flexibly matched. There is no need to set up an end cover mold separately for the motor, which can effectively reduce costs. At the same time, the other end of the through-shaft gear pump is connected to the engine, realizing the two-way transmission of power from the engine and the motor to the through-shaft gear pump.

[0031] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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 specific implementations, 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:

[0033] Figure 1A The structure block diagram of the first hybrid power system according to the embodiment of the present application is schematically shown;

[0034] Figure 1B A structural block diagram of a second hybrid power system according to an embodiment of the present application is schematically shown;

[0035] Figure 1C The structure block diagram of the third hybrid power system according to the embodiment of the present application is schematically shown;

[0036] Figure 1D The structure block diagram of the fifth hybrid power system according to the embodiment of the present application is schematically shown;

[0037] Figure 1E The structure block diagram of the sixth hybrid power system according to the embodiment of the present application is schematically shown;

[0038] Figure 2 A schematic diagram of a control method for a hybrid power system according to an embodiment of the present application is schematically shown;

[0039] Figure 3A The structural block diagram of the through-axis gear pump according to the embodiment of the present application is schematically shown;

[0040] Figure 3B The structural block diagram of another through-axis gear pump according to an embodiment of the present application is schematically shown;

[0041] Figure 4 The internal structure diagram of a computer device according to an embodiment of the present application is schematically shown.

[0042] Description of Reference Numerals

[0043] 101 Through-axis gear pump 102 Engine

[0044] 103 Motor 104 Power Battery

[0045] 105 Vehicle Controller 106 Piston Pump

[0046] 107 Speed ​​reducer 108 Power take-off

[0047] 109 Clutch 110 Transmission

[0048] 111 All-in-one controller

[0049] 310 input through gear shaft 312 first input end

[0050] 314 second input end 320 driven gear shaft

[0051] 330 Pump housing 340 Left end cover

[0052] 360 right end cap DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution 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 used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] 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 used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0056] In the embodiments of the present application, Figure 1A As shown, a structural block diagram of a first hybrid power system is provided. Specifically, the hybrid power system includes:

[0057] A through-axis gear pump 101, the through-axis gear pump 101 comprises 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;

[0058] The first branch includes an engine 102;

[0059] The second branch includes a motor 103 and a power battery 104, and the motor 103 is connected to the power battery 104;

[0060] 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-shaft gear pump 101 (not shown in the figure).

[0061] An engine is a machine that can convert other forms of energy into mechanical energy. In this technical solution, the engine used is an internal combustion engine, which makes fuel and air mixed and compressed to produce explosion to generate power, convert thermal energy into mechanical energy, and drive the vehicle to travel or work. A motor refers to an electromagnetic device that realizes electrical energy conversion or transmission according to the law of electromagnetic induction. It can be used as an electric motor to drive a hydraulic pump group, and can also be used as a generator to charge a power battery.

[0062] In the embodiments of the present application, Figure 1B As shown, a structural block diagram of a second hybrid power system is provided. Specifically, the first branch of the hybrid power system also includes:

[0063] 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, constitutes an oil pump assembly system, which is used to connect to a target operating system and transmit the first output torque of the engine 102 to the target operating system.

[0064] The plunger pump is a type of water pump and an important working part in hydraulic and pneumatic transmission. It belongs to the category of positive displacement pump and reciprocating pump. The plunger pump relies on the reciprocating motion of the plunger on the cylinder body to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation, and is widely used in high pressure, large flow and flow regulation occasions. In this technical solution, the first end of the plunger pump is connected to the engine, the second end of the plunger pump is connected to the gear pump, and the gear pump constitutes an oil pump assembly system, and the oil pump assembly system can be used to connect with the target operating system and transmit the first output torque of the engine to the target operating system. Among them, the target operating system can refer to the vehicle operating system, the engine outputs the first output torque through the first branch of the hybrid power system to the oil pump assembly system connected to the first branch, and the first input end of the input through gear shaft in the oil pump assembly system, after receiving the first output torque, applies the first output torque to the vehicle operating system for the vehicle operating system to operate.

[0065] 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 is coaxial with the plunger pump and the through-shaft gear pump 101 to form an oil pump assembly system, and the motor 103 is used to provide a second output torque.

[0066] In the present technical solution, the hybrid power system may not use a speed reducer to connect to the motor, and may 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 power 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 on-board operating system for the on-board operating system to operate.

[0067] In the embodiments of the present application, Figure 1C As shown, a structural block diagram of a third hybrid power system is provided. Specifically, the second branch of the hybrid power system also includes:

[0068] 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 is coaxial with the piston pump 106 and the through-shaft gear pump 101 to form an oil pump assembly system, and the reducer 107 is used to adjust the first transmission ratio of the motor 103. When the reducer 107 adjusts the first transmission ratio to reduce the rotation 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.

[0069] A reducer is a power transmission mechanism that uses a gear speed converter to reduce the number of revolutions of an electric motor (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 and the plunger pump and the input through-shaft gear pump form an oil pump assembly system coaxially, and 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.

[0070] In the embodiments of the present application, Figure 1D As shown, a structural block diagram of a fifth hybrid power system is provided. Specifically, the first branch of the hybrid power system further includes:

[0071] 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 ;

[0072] 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;

[0073] The transmission 110 has a first end connected to the clutch 109 and a second end connected to the power take-off 108 , and is used to adjust a second transmission ratio of the engine 102 .

[0074] A power take-off is a group or multiple groups of speed 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 gearbox 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 the vehicle operation system to operate.

[0075] 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 the transmission system can be separated or engaged 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 the present 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.

[0076] A transmission is a gear transmission device that can change the transmission ratio of the output shaft and the input shaft in fixed or divided steps. It is also called a gearbox. The transmission consists of a transmission mechanism and a speed change mechanism. It can be made into a separate speed change mechanism or installed in the same housing with the transmission mechanism. The transmission mechanism usually uses ordinary gear transmission or planetary gear transmission. Among them, ordinary gear transmission speed change mechanisms generally use sliding gears and clutches. Sliding gears are divided into multi-link sliding gears and variable-position sliding gears. The axial dimension is large when using a triple sliding gear to change speed, and the structure is compact when using a variable-position sliding gear to change speed, but the transmission ratio changes little. Transmissions are widely used in machine tools, vehicles and other machines that require speed changes. The machine tool spindle is often installed in the transmission, so it is also called the spindle box. Its structure is compact and convenient for centralized operation. The transmission used to change the feed amount on the machine tool is called a feed box. Specifically, in this technical solution, 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, which can be used to adjust the second transmission ratio of the engine.

[0077] 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.

[0078] In the embodiments of the present application, Figure 1E As shown, a structural block diagram of a sixth hybrid power system is provided. Specifically, the controller can 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.

[0079] When the hybrid power 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 the second preset remaining power, an external power source such as a mains power supply is connected to charge the power battery. 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 is lower than 80%, an external power source such as a mains power supply is connected to charge the power battery.

[0080] 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 to achieve 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, at this time, the input through-shaft gear pump transmits the first output torque of the engine to the target operating system through the first branch.

[0081] 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.

[0082] Figure 2 The flowchart of a control method for a hybrid power system according to an embodiment of the present application is schematically shown. Figure 2 As shown, an embodiment of the present application provides a control method for a hybrid power system, which may include the following steps.

[0083] Step 201: 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.

[0084] In the embodiment 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, and the through shaft can effectively transmit the torque generated by the engine to the transmission device. The through shaft gear pump provided in the present technical solution includes gear shafts parallel to each other in the gear pump 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.

[0085] Specifically, Figure 3A and 3B As shown, two types of through-shaft gear pumps are available. Figure 3B The through-shaft gear pump includes two gear-linked input through-shaft gear shafts, namely, the first input through-shaft gear shaft Figure 3B The input shaft 1 and the second input through gear shaft are Figure 3B The input shaft 2 in which the first input through gear shaft includes a first input end, namely Figure 3B The input end 1 in the second input through gear shaft includes a second input end, that is, Figure 3B Input 2 in. Figure 3A In the embodiment, the through-shaft gear pump comprises: an input through-shaft gear shaft 310 , comprising a first input end 321 and a second input end 314 ; and a driven gear shaft 320 , meshing with the input through-shaft gear shaft 210 .

[0086] 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 disposed on the first side of the input through-shaft gear pump and a second input end disposed 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 disposed 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 respectively 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, the mutually meshing driven gear shafts can be driven.

[0087] 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.

[0088] The pump housing refers to a protective housing of a pump. Common pump housings can be used to isolate the pumped medium from the atmosphere to prevent leakage of the medium and maintain the internal pressure of the pump. Specifically, in the present technical solution, the pump housing of the input through-shaft gear pump is used to fix the input through-shaft gear shaft and the driven gear shaft, isolate the interior of the input through-shaft gear pump from the external environment, and prevent leakage caused by splashing of the liquid during transportation 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 cover fixed to the first end of the pump housing, and a right end cover fixed to the second end of the pump housing. The left end cover and the right end cover 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. At the same time, both the left end cover and the right end cover can be opened to facilitate the replacement of the input through-shaft gear shaft and the driven gear shaft. In the present technical solution, ... Figure 3AThe through-axis gear pump in the embodiment is applied to the hybrid power system as shown in FIG1. ​​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 torque that causes an object to rotate. The torque of the engine refers to the torque output from the crankshaft end of the engine. 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, which is used to reflect the remaining capacity of the battery. It is numerically 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 directly measured, and its size can only be estimated by parameters such as the battery terminal voltage, charge and discharge current, and internal resistance.

[0089] 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.

[0090] In the 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 according to the magnitude of the first output torque and the magnitude of the remaining power. Specifically, when the first output torque and the remaining power meet the first preset condition, it can be confirmed that the fuel consumption rate of the engine is low, and the controller controls the second input end of the through-shaft gear pump to be connected to the second branch of the hybrid power system, thereby connecting the motor to improve the fuel consumption rate of the engine through the motor.

[0091] 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.

[0092] In the present technical solution, the preset torque interval is determined by the engine model, wherein the preset torque interval includes a lower limit and an upper limit, and the first preset remaining power may refer to the safe power of the power battery. When the remaining power is lower than the safe power, continuing to use the power battery will reduce the activity of the power battery, and the service life of the power battery will be affected in the long run. Therefore, the first preset remaining power can be regarded as the triggering power of the self-protection mechanism of the power battery. Taking a mobile phone battery as an example, when the power of the mobile phone battery is 20% remaining, the mobile phone will automatically pop up a reminder to enter the low power mode to slow down power consumption. Therefore, in the present technical solution, the first preset remaining power can be set to 20%. In the case of satisfying any of the following, it can be determined that the first output torque and the remaining power meet the first 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 interval, and the remaining power is less than or equal to the first preset remaining power. Specifically, it can refer to the lower limit of the first output torque interval 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, it may refer to when the first output torque of the engine is in 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, it 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%.

[0093] Step 203: adjust the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine.

[0094] In the 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 judge the fuel consumption rate of the engine according to the size of the first output torque and the size of the remaining power. When the first output torque and the remaining power meet the first preset condition, it can be confirmed 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, so as to improve 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 improve the fuel consumption rate of the engine.

[0095] 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 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.

[0096] In the present technical solution, the first preset condition includes three situations. Specifically, for the first situation, at this time, the first output torque of the engine is less than or equal to the lower limit of the torque interval, and the power battery SOC value is less than or equal to 20%. The controller controls the motor to start and generate electricity as the load of the engine. At this time, the motor outputs negative torque. The controller controls the output negative torque of the motor to increase to increase the first output torque of the engine, and make it reach the preset torque interval and not exceed the upper limit of the preset torque interval, thereby improving the fuel consumption rate of the engine. At the same time, the electricity generated by the motor is output to the power battery to charge the power battery. For the second situation, at this time, when the first output torque of the engine is in the torque interval, and the power battery SOC value is less than or equal to 20%, at this time, the controller controls the motor to start and generate electricity, and the motor outputs negative torque. The controller controls the output negative torque of the motor to increase to increase the first output torque of the engine, and make it not exceed the upper limit of the preset torque interval, thereby improving the fuel consumption rate of the engine. When the motor is used 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 to transmit 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-board operating system.

[0097] 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.

[0098] In the technical scheme, for the third situation under the first preset condition, at this time, the first output torque of the engine is greater than the upper limit of the torque range, and the SOC value of the power battery is greater than 20%, the controller controls the motor to start and use electricity, and the motor provides power by consuming the power of the power battery. At this time, the motor outputs positive torque, and the controller controls the output positive torque of the motor to increase to reduce the first output torque of the engine and make it reach the preset torque range, thereby improving the fuel consumption rate of the engine. In the case of the motor using electricity, the engine transmits the reduced first output torque to the power take-off after the clutch and the transmission, and the power take-off is connected to the transmission shaft to transmit power to the plunger pump in the oil pump assembly system, and the plunger pump transmits power to the through-shaft gear pump through the first input end of the through-shaft gear pump. At the same time, the motor, driven by the power battery, outputs positive torque and transmits power to the through-shaft gear pump through the second input end of the through-shaft gear pump after the reducer, thereby driving the through-shaft gear pump to provide power for the vehicle operation system under the power of the engine and the motor.

[0099] The above technical solution introduces a through-axis gear pump with two input ends. One end of the through-axis gear pump can be connected to the motor alone, so that the motor model does not need to be restricted by the speed ratio of other structural parts such as the generator when replacing it, and the motor model is flexibly matched. The motor does not need to set up a separate end cover mold, which can effectively reduce costs. At the same time, the other end of the through-axis gear pump is connected to the engine, realizing the two-way transmission of power from the engine and the motor to the through-axis gear pump.

[0100] 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.

[0101] 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 according to the magnitude of the first output torque and the magnitude of the remaining power. When the first output torque and the remaining power meet the second preset condition, it can be confirmed that the fuel consumption rate of the engine meets the actual demand. At this time, the controller needs to control the second input end of the through-axis gear pump to be disconnected from the second branch of the hybrid power system, control the motor to be turned off, and control the engine to drive the through-axis gear pump with the first output torque.

[0102] 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.

[0103] In the present technical solution, the first preset remaining power can be set to 20%. When any 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 interval, and the remaining power is greater than the first preset remaining power. Specifically, it can refer to the first output torque of the engine is less than or equal to the lower limit of the torque interval, and the power battery SOC is greater than 20%. The second situation: the first output torque is within the preset torque interval, 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 interval, 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 interval, and the remaining power is less than the first preset remaining power. Specifically, it can refer to the first output torque of the engine is greater than the upper limit of the torque interval, and the power battery SOC value is less than 20%.

[0104] 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.

[0105] 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 a mains supply is connected to charge the power battery.

[0106] This technical solution, through a through-shaft gear pump including two input ends, realizes the bidirectional transmission of power to the through-shaft gear pump through the engine and the motor without changing the original transmission route. At the same time, the through-shaft gear pump provided in this technical solution can quickly realize the bidirectional input of the gear pump by replacing the driven gear shaft and the sealing end cover of the gear pump with the input shaft and input end cover of the gear pump, and the drive motor does not need to open a separate end cover mold, and the cost of the entire oil pump and motor assembly is lower. In the hybrid power system, the input shaft at the other end of the gear pump can be driven by the motor and the reducer to achieve the matching of different motors and reducers, and the system is more flexible.

[0107] The hybrid power system including the through-shaft gear pump provided by the present invention 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.

[0108] An embodiment of the present application provides a storage medium on which a program is stored. When the program is executed by a controller, the control method for a hybrid power system is implemented.

[0109] 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 a hybrid power system when it is run.

[0110] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 4 As shown. 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 through a system bus. Among them, 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 through a network connection. When the computer program B02 is executed by the controller A01, a control method for a hybrid power system is implemented.

[0111] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part 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 those shown in the figure, or combine certain components, or have a different arrangement of components.

[0112] 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.

[0113] In one embodiment, the first output torque and the remaining power are determined to satisfy 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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, 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.

[0120] In one embodiment, the first output torque and the remaining power are determined to satisfy 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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 adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0127] 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 process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0128] 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 work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured 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.

[0129] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby 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.

[0130] In a typical configuration, a computing device includes one or more controllers (CPU), input / output interfaces, network interfaces, and memory.

[0131] 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.

[0132] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. 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 disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic 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 carrier waves.

[0133] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity 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, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0134] The above are only 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 changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in 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 an input through-shaft gear shaft, and the input through-shaft gear shaft is a straight through-shaft, 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, 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; adjusting the second output torque of the motor to change the first output torque to improve the fuel consumption rate of the engine; 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.

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 2, 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: 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.

6. 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.

7. 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 6.

8. A hybrid power system, characterized in that: include: A through-shaft gear pump, comprising an input through-shaft gear shaft, wherein the input through-shaft gear shaft is a straight through-shaft, and the through-shaft gear pump comprises a first input end and a second input end, wherein 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 7.

9. The hybrid power system according to claim 8, characterized in that: The through-axis gear pump also includes: The input through gear shaft comprises the first input end and the second input end; The driven gear shaft meshes with the input through gear shaft.

10. The hybrid power system according to claim 9, 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.

11. The hybrid power system according to claim 9, 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.

12. The hybrid power system according to claim 11, 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.

13. The hybrid power system according to claim 11, 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.

14. The hybrid power system according to claim 11, 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.

15. The hybrid power system according to claim 11, 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.

16. The hybrid power system according to claim 11, 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.

17. 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 6.

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