CN117755276A

CN117755276A - Control method for hybrid power system and hybrid power system

Info

Publication number: CN117755276A
Application number: CN202311648819.4A
Authority: CN
Inventors: 任永辉; 易凌云; 张桂连; 李波; 沈昌武
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-03-26

Abstract

The application discloses a control method for hybrid power system, hybrid power system includes engine, motor, first clutch, second clutch, derailleur and power battery, and first clutch is electromagnetic clutch, and control method includes: acquiring real-time electric quantity of a power battery; determining a target working mode of the hybrid power system according to the real-time electric quantity; when the target working mode is the pure electric mode, the first clutch is controlled to be disconnected so as to control the motor to independently drive the transmission; in the case where the target operating mode is the pure fuel mode, the first clutch is controlled to be engaged, and the engine is controlled to individually drive the transmission. Through the technical scheme, the electromagnetic clutch can flexibly match the engine, the motor and the transmission so as to realize various driving modes, and meanwhile, the manufacturing cost of the system is reduced. The technical problem that friction work of the motor needs to be overcome when the motor directly drives the running engine to rotate along with the running engine can also be solved, so that the energy utilization rate of the motor is improved.

Description

Control method for hybrid power system and hybrid power system

Technical Field

The application relates to the technical field of engineering machinery, in particular to a control method and device for a hybrid power system, the hybrid power system and an electric automobile crane.

Background

Currently, common hybrid systems for work vehicles include an engine, an electric machine, a clutch, a transmission, and a drive system. Wherein the engine and the motor are coupled by mechanical structure. If the loading mechanism of the engineering vehicle needs electric driving operation, an additional motor needs to be added, resulting in increased economic cost. In addition, when the motor directly drives and runs, the motor rotates along with the engine, so that friction work generated by the motor and the engine is overcome, and the energy utilization rate of the motor is reduced. Meanwhile, the engine always keeps idling, and the service life of the engine is also influenced.

Disclosure of Invention

The embodiment of the application aims to provide a control method and device for a hybrid power system, the hybrid power system and an electric automobile crane, which are used for solving the technical problems that in the prior art, the energy utilization rate of a motor is reduced, and the cost of the motor is increased additionally.

In order to achieve the above object, a first aspect of the present application provides a control method for a hybrid system including an engine, a motor, a first clutch, a second clutch, a transmission, and a power battery, the first clutch being an electromagnetic clutch, the first clutch being connected with the engine and the motor, respectively, the second clutch being connected with the motor and the transmission, respectively, the second clutch being in an initial state of engagement so that the motor and the transmission are in a communicating state, the power battery being connected with the motor, the control method comprising:

acquiring real-time electric quantity of a power battery;

determining a target working mode of the hybrid power system according to the real-time electric quantity;

when the target working mode is the pure electric mode, the first clutch is controlled to be disconnected, so that the engine is disconnected from the motor, and the motor is controlled to independently drive the transmission;

in the case where the target operating mode is the pure fuel mode, the first clutch is controlled to be engaged so that the engine communicates with the motor and the engine is controlled to individually drive the transmission.

In an embodiment of the present application, the control method is applied to an engineering vehicle, and the control method further includes: under the condition that the target working mode is a hybrid power mode, acquiring the running speed and the load of the engineering vehicle; under the condition that the running speed is greater than a preset speed threshold, the first clutch is controlled to be engaged, so that the intervention proportion of the engine and the motor is adjusted according to the load and the real-time electric quantity, and the engine and the motor jointly drive the transmission; and under the condition that the running speed is less than or equal to a preset speed threshold value, the first clutch is controlled to be disconnected.

In an embodiment of the present application, the control method further includes: and under the condition that the real-time electric quantity is smaller than or equal to a preset electric quantity threshold value and the second clutch is disconnected, the first clutch is controlled to be engaged so as to control the engine to drive the motor to generate electricity to charge the power battery.

In an embodiment of the present application, determining a target operating mode of the hybrid system based on the real-time electrical quantity includes: determining a plurality of selectable working modes according to the real-time electric quantity, and displaying the selectable working modes through an interactive interface; and acquiring the working mode selected by the user through the interactive interface to serve as a target working mode of the hybrid power system.

In an embodiment of the present application, determining the selectable operation modes for the user based on the real-time power comprises: under the condition that the real-time electric quantity is smaller than or equal to a preset electric quantity threshold value, the selectable working modes comprise a pure fuel mode; and when the real-time electric quantity is larger than a preset electric quantity threshold value, determining that the selectable working modes comprise a pure electric mode and a hybrid power mode.

In the embodiment of the application, the control method is applied to the electric automobile crane.

In an embodiment of the present application, the control method further includes: under the condition that the target working mode is a hybrid power mode or a pure electric mode, determining whether the crane is in an electric plugging operation state; under the condition that the crane is in a plugging operation state, determining the operation power consumption of an on-board operation mechanism; controlling the power battery to charge under the condition that the operation power consumption is smaller than a preset power consumption threshold value; and controlling the power battery to drive the boarding operation mechanism to operate under the condition that the operation power consumption is larger than or equal to a preset power consumption threshold.

A second aspect of the present application provides a control apparatus for a hybrid system, comprising:

a memory configured to store instructions; and

the processor is configured to call instructions from the memory and when executing the instructions is capable of implementing the control method for the hybrid system described above.

A third aspect of the present application provides a hybrid system comprising:

an engine;

a motor;

a transmission;

the power battery is connected with the motor;

the first clutch is an electromagnetic clutch and is respectively connected with the engine and the motor;

the second clutch is respectively connected with the motor and the transmission, and the initial state of the second clutch is an engagement state, so that the motor and the transmission are in a communication state; and

the control device for a hybrid system described above.

In an embodiment of the present application, further includes: and the ISG motor is respectively connected with the engine and the power battery and is used for driving the ISG motor to generate electricity by the engine so as to charge the power battery.

A fourth aspect of the present application provides an electric mobile crane comprising a hybrid system according to claim 8 or 9.

In an embodiment of the present application, further includes: a loading operation mechanism; the oil pump assembly is connected with the boarding operation mechanism and used for driving the boarding operation mechanism to operate; the power takeoff is respectively connected with the speed changer and the oil pump assembly and is used for transmitting the power of the speed changer to the oil pump assembly; and the driving axle is connected with the speed changer and used for driving the chassis of the electric automobile crane to run.

A fifth aspect of the present application provides a machine-readable storage medium having stored thereon instructions for causing a machine to perform the above-described control method for a hybrid system.

Through the technical scheme, the electromagnetic clutch is connected between the engine and the motor, so that the motor and the engine are coupled. When the working mode is switched according to the real-time electric quantity, the mode of automatically adjusting the engine and the motor to drive through the electromagnetic clutch is flexibly matched with the transmission to realize various driving modes, and meanwhile, the manufacturing cost of the system is reduced. The technical problem that the motor needs to overcome friction work of the motor when the motor directly drives the running engine to rotate along with the running engine can be solved, so that the energy utilization rate of the motor is improved. And be connected with the second clutch between motor and derailleur, utilize the second clutch can accomplish the operation of shifting, it is simple convenient.

Additional features and advantages of embodiments of the present application will be set forth in the detailed description that follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain, without limitation, the embodiments of the present application. In the drawings:

FIG. 1 schematically illustrates a structural schematic of a hybrid powertrain according to an embodiment of the present application

FIG. 2 schematically illustrates a flow chart of a control method for a hybrid powertrain, according to an embodiment of the present application;

FIG. 3 schematically illustrates a flow chart of a control method for a hybrid powertrain, in accordance with a specific embodiment of the present application;

FIG. 4 schematically illustrates a flow chart of a control method for a hybrid powertrain system according to yet another specific embodiment of the disclosure;

FIG. 5 schematically illustrates a block diagram of a control device for a hybrid powertrain, according to an embodiment of the present application;

fig. 6 schematically shows a structural schematic diagram of an electric automobile crane according to an embodiment of the present application;

fig. 7 schematically shows an internal structural diagram of a computer device according to an embodiment of the present application.

Description of the reference numerals

100. Hybrid powertrain 110 engine

120. Motor 130 speed changer

140. First clutch of power battery 150

160. Second clutch 170 all-in-one controller

510. Memory 520 processor

611. Engine 612 motor

613. Transmission 614 power cell

615. First clutch 616 second clutch

617. All-in-one controller 620 boarding operation mechanism

630. Oil pump assembly 640 power takeoff

650. Driving axle

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it should be understood that the specific implementations described herein are only for illustrating and explaining the embodiments of the present application, and are not intended to limit the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

It should be noted that, in the embodiment of the present application, directional indications (such as up, down, left, right, front, and rear … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

Fig. 1 schematically shows a structural schematic diagram of a hybrid system according to an embodiment of the present application. As shown in fig. 1, an embodiment of the present application provides a hybrid system 100 that includes an engine 110, an electric machine 120, a transmission 130, a power cell 140, a first clutch 150, a second clutch 160, and an all-in-one controller 170. The all-in-one controller 170 is connected to the power battery 140 and the motor 120, respectively. The first clutch 150 is an electromagnetic clutch, and is connected to the engine 110 and the motor 120, respectively. The all-in-one controller 170 may automatically control the engaged or disengaged state of the first clutch. The second clutch 160 is connected to the motor 120 and the transmission 130, respectively, and an operator can perform a manual shift operation on the transmission 130 through the second clutch 160, so that the second clutch 160 is engaged or disengaged, thereby controlling the running of the vehicle.

In an embodiment of the present application, as shown in FIG. 1, generator 120 may be an ISG motor. The engine 110 may drive the ISG motor to generate electricity, and the power battery 140 is charged by the ISG motor to convert kinetic energy of the engine 110 into electric energy to be stored in the power battery 140. Wherein the transmission 130 may be a manual transmission. When the second clutch 160 is disengaged, the shift is completed according to the user's operation of shifting the shift position. Compared with a matched manual-automatic transmission, the manual-automatic transmission has higher overall cost, the whole gear shifting control is complex, the motor cannot drive engine accessories to work under the idle working condition of stopping, the engine still needs to keep idle, and the working condition has influence on the fuel economy of the vehicle. The traditional manual transmission is lower in cost, simple in gear shifting control structure and more beneficial to batch production and commercial use.

Fig. 2 schematically shows a flow chart of a control method for a hybrid powertrain according to an embodiment of the present application. As shown in fig. 2, the embodiment of the present application provides a control method for a hybrid system, which is applied to the all-in-one controller 170 in fig. 1 to be illustrated, and includes the following steps:

s202, acquiring the real-time electric quantity of the power battery.

The real-time electric quantity of the power battery can be represented by an SOC value, wherein the SOC value refers to the ratio of the charging capacity to the rated capacity and is represented by a percentage.

S204, determining a target working mode of the hybrid power system according to the real-time electric quantity.

The target operation mode refers to an operation mode in which the hybrid system executes a job. The operation modes include a pure electric mode, a pure fuel mode, and a hybrid mode. The electric-only mode is a mode in which the motor is used for generating electricity to drive the operation, the fuel-only mode is a mode in which the motor is used for driving the operation independently, and the hybrid mode is a mode in which the engine and the motor are used for driving the operation together. The all-in-one controller can determine a target working mode of the hybrid power system according to the real-time electric quantity.

The selectable operation mode refers to an operation mode that a user can select. The all-in-one controller can determine the working mode which can be selected by the user according to the real-time electric quantity, and the selectable working mode is displayed in the interactive interface. The user may select an operating mode from the selectable operating modes via the interactive interface. After the all-in-one controller acquires the original working mode of the user, the all-in-one controller is used as the target working mode of the hybrid power system.

Specifically, the preset charge threshold may refer to an SOC value of 20%. In the case where the SOC value is less than or equal to 20%, the optional operation mode includes a pure fuel mode. In the case where the SOC value is greater than 20%, the selectable operation modes include an electric-only mode and a hybrid mode. The pure electric mode can be used as an optional working mode under the condition that the SOC value is more than 80%.

S206, when the target working mode is the pure electric mode, the first clutch is controlled to be disconnected, so that the engine is disconnected from the motor, and the motor is controlled to independently drive the transmission.

The second clutch initial state is an engaged state such that the motor and the transmission are in a communicating state. Under the condition that the target working mode is the pure electric mode, the all-in-one controller can control the first clutch to be disconnected, so that the engine is disconnected from the motor, the transmission is independently driven by the motor, the load generated by the engine along with rotation in the pure electric mode can be reduced, and the energy utilization rate of the motor is improved.

S208, in the case where the target operation mode is the pure fuel mode, the first clutch is controlled to be engaged so that the engine communicates with the motor to control the engine to individually drive the transmission.

The second clutch initial state is an engaged state such that the motor and the transmission are in a communicating state. In the case where the target operating mode is a pure fuel mode, the all-in-one controller may control the first clutch to engage such that the engine communicates with the electric machine to control the engine to drive the transmission alone. The drive mode of the hybrid system is changed by opening and closing the first clutch.

The work vehicle may refer to an excavator, a bulldozer, a crane, or the like. The engineering vehicle comprises the mixing system. The second clutch initial state is an engaged state such that the motor and the transmission are in a communicating state. Under the condition that the target working mode is a hybrid power mode, the all-in-one controller can acquire the running speed and the load of the engineering vehicle. In the event that the travel speed is greater than a preset speed threshold, the first clutch is controlled to engage such that the engine communicates with the electric machine to drive the transmission through the engine and the electric machine together. And adjusting the intervention proportion of the engine and the motor based on the load of the vehicle and the real-time electric quantity. In the case where the running speed is less than or equal to the preset speed threshold, the first clutch is controlled to be disconnected so that the engine is disconnected from the motor to individually drive the transmission through the motor. Specifically, when the vehicle speed is low, the electromagnetic clutch is controlled to be disconnected, and the starting stage takes a motor driving mode as a main mode, so that the low-rotation-speed high-torque performance of the motor is exerted. When the vehicle speed increases, the electromagnetic clutch is engaged, causing the engine drive to intervene. Under the condition of higher SOC value, if the engine load is larger, the engine torque can be reduced by adjusting the output torque of the motor, so that the engine operation condition is optimized, and the fuel utilization rate of the engine is improved.

In a specific embodiment, as shown in fig. 3, in a case where the real-time power of the power battery is less than or equal to the preset power threshold, the optional operation mode is a pure fuel mode. And when the target working mode is a pure fuel mode, the electromagnetic clutch can be controlled to be engaged. Under the condition that the real-time electric quantity of the power battery is larger than a preset electric quantity threshold value, the optional working mode is a pure electric mode. In the case where the target operation mode is the electric-only mode or the hybrid mode. In the case where the target operation mode is the electric-only mode, the electromagnetic clutch is disconnected. Under the condition that the target working mode is a hybrid power mode, acquiring the running speed of the engineering vehicle; controlling the engagement of the electromagnetic clutch under the condition that the running speed is greater than a preset speed threshold value; and controlling the electromagnetic clutch to be disconnected under the condition that the running speed is less than or equal to a preset speed threshold value.

The motor may be an ISG motor. And the ISG motor (Integrated Starter and Generator) is an automobile starting and power generation integrated machine, is directly integrated on an engine main shaft, and is directly used for replacing the traditional starting motor by a motor with larger transient power. The engine is replaced for a short time to drive the automobile in a starting stage, the engine is started, idle speed loss and pollution of the engine are reduced, the engine drives the automobile in normal running, and the motor is disconnected or plays a role of a generator. When braking, the motor can also play a role in regenerating electricity and recovering braking energy. And under the condition that the real-time electric quantity is smaller than or equal to a preset electric quantity threshold value and the second clutch is disconnected, the all-in-one controller can control the electromagnetic clutch to be engaged. Meanwhile, the engine is controlled to drive the ISG motor to generate electricity so as to charge the power battery. Specifically, in the case where the target operation mode is the hybrid mode, if the engine load is large in the case where the SOC value is high, the engine operation condition may be optimized by adjusting the output torque of the motor to reduce the engine torque. If the SOC value is lower and the engine load is lower, the motor can be adjusted to serve as a load, the load of the engine is improved, and meanwhile the engine is used for charging and supplementing energy for the power battery.

In the embodiment of the application, the control method is applied to the electric automobile crane. The electric automobile crane also comprises an on-board operation mechanism. The control method further comprises the following steps: under the condition that the target working mode is a hybrid power mode or a pure electric mode, determining whether the crane is in an electric plugging operation state; under the condition that the crane is in a plugging operation state, determining the operation power consumption of an on-board operation mechanism; controlling the power battery to charge under the condition that the operation power consumption is smaller than a preset power consumption threshold value; and controlling the power battery to drive the boarding operation mechanism to operate under the condition that the operation power consumption is larger than or equal to a preset power consumption threshold.

The plugging operation state refers to that the electric automobile crane directly obtains electric energy through plugging to drive operation. Plugging in may refer to obtaining electrical energy from a utility grid. And under the condition that the target working mode is a hybrid power mode or a pure electric mode, the all-in-one controller can determine whether the crane is in a plug-in working state. Under the condition that the crane is in a plugging operation state, the all-in-one controller can determine the operation power consumption of the boarding operation mechanism. And if the operation power consumption is smaller than the preset power consumption threshold, controlling the power battery to charge until the electric quantity of the power battery exceeds the set electric quantity threshold. And under the condition that the operation power consumption is greater than or equal to a preset power consumption threshold, controlling the power battery to drive the boarding operation mechanism to operate.

In a specific embodiment, referring to fig. 4, in the case where the real-time power is greater than the preset power threshold, the selectable operation mode is an electric-only mode or a hybrid mode. Under the condition that the target working mode is a pure electric mode, the electromagnetic clutch can be controlled to be disconnected, so that the electric drive operation of the vehicle can be realized. And under the condition that the real-time electric quantity is smaller than or equal to a preset electric quantity threshold value, whether the commercial power grid supplies power to the crane or not can be determined. If the utility grid supplies power to the crane (plug-in operating state), the utility grid can charge the power battery. If the commercial power grid does not supply power to the crane (in a non-plug-in operation state) and the operation power consumption is smaller than a preset power consumption threshold value, the electromagnetic clutch can be controlled to be engaged, the second clutch is disconnected, the engine drives the ISG motor to generate power, and energy is supplied to the power battery.

Through the technical scheme, the electromagnetic clutch is connected between the engine and the motor, so that the motor and the engine are coupled. When the working mode is switched according to the real-time electric quantity, through the technical scheme, the electromagnetic clutch can enable the engine and the motor to be flexibly matched with the transmission. The engine and the motor can be driven independently or jointly to realize multiple driving modes, and meanwhile, the manufacturing cost of the system is reduced. The technical problem that friction work of the motor needs to be overcome when the motor directly drives the running engine to rotate along with the running engine can also be solved, so that the energy utilization rate of the motor is improved. And be connected with the second clutch between motor and derailleur, utilize the second clutch can accomplish the operation of shifting to the derailleur, it is simple convenient.

Fig. 5 schematically shows a block diagram of a control apparatus for a hybrid system according to an embodiment of the present application. As shown in fig. 5, an embodiment of the present application provides a control device for a hybrid system, which may include:

a memory 510 configured to store instructions; and

processor 520 is configured to invoke instructions from memory 510 and when executing instructions to implement the control method for a hybrid powertrain described above.

Specifically, in the embodiment of the present application, the control device for the hybrid system is the all-in-one controller 170 shown in fig. 1.

Specifically, in embodiments of the present application, processor 520 may be configured to:

acquiring real-time electric quantity of a power battery;

In embodiments of the present application, processor 520 may be further configured to:

the control method is applied to the engineering vehicle, and the control method further comprises the following steps: under the condition that the target working mode is a hybrid power mode, acquiring the running speed and the load of the engineering vehicle; under the condition that the running speed is greater than a preset speed threshold, the first clutch is controlled to be engaged, so that the intervention proportion of the engine and the motor is adjusted according to the load and the real-time electric quantity, and the engine and the motor jointly drive the transmission; and under the condition that the running speed is less than or equal to a preset speed threshold value, the first clutch is controlled to be disconnected.

the control method further comprises the following steps: and under the condition that the real-time electric quantity is smaller than or equal to a preset electric quantity threshold value and the second clutch is disconnected, the first clutch is controlled to be engaged so as to control the engine to drive the motor to generate electricity to charge the power battery.

In an embodiment of the present application, the processor 520 may be further configured to:

the control method is applied to the electric automobile crane.

the control method further comprises the following steps: under the condition that the target working mode is a hybrid power mode or a pure electric mode, determining whether the crane is in an electric plugging operation state; under the condition that the crane is in a plugging operation state, determining the operation power consumption of an on-board operation mechanism; controlling the power battery to charge under the condition that the operation power consumption is smaller than a preset power consumption threshold value; and controlling the power battery to drive the boarding operation mechanism to operate under the condition that the operation power consumption is larger than or equal to a preset power consumption threshold.

Fig. 6 schematically shows a structural schematic diagram of an electric automobile crane according to an embodiment of the present application. As shown in fig. 6, an embodiment of the present application provides an electric automobile crane, which may include the above hybrid power system.

The system includes an engine 611, an electric machine 612, a transmission 613, a power cell 614, a first clutch 615, a second clutch 616, and an all-in-one controller 617. The all-in-one controller 617 is connected to the power battery 614 and the motor 612, respectively. The first clutch 615 is an electromagnetic clutch, and is connected to the engine 611 and the motor 612, respectively. The all-in-one controller 617 can automatically control the state of engagement or disengagement of the first clutch 615. The second clutch 616 is connected to the motor 612 and the transmission 613, respectively, and an operator can manually operate the second clutch 616 such that the second clutch 616 is engaged or disengaged, thereby controlling the running of the vehicle. The all-in-one controller 617 may perform the control method for the hybrid system described above.

In an embodiment of the present application, as shown in fig. 6, the motor may refer to an ISG motor. The ISG motor is connected to the engine 611 and the power battery 614, respectively, the engine 611 can drive the ISG motor to generate electricity, and the power battery 614 is charged by the ISG motor to convert kinetic energy of the engine 611 into electric energy to be stored in the power battery 614.

Specifically, the second clutch may employ a conventional clutch. If the transmission is a traditional manual transmission, the electromagnetic clutch is controlled by the ECU, and the electromagnetic clutch sends a control request by the BCM during the boarding operation. If the transmission is an automated manual transmission, the switch request of the electromagnetic clutch may send a control request through the BCM or the vehicle controller VCU. The automatic control of the chassis drive is realized by adopting the manual-automatic transmission, and the gear shifting fatigue of a driver in running can be reduced. And by automatic control, the power interruption time can be shortened, and the fuel economy in the driving mode can be improved. The power battery can be arranged at the lower part of the crane, in particular at the chassis, or at the upper part through high-voltage current collection. The hybrid system is not limited to the crane, but is also applicable to other vehicle types in which two or more kinds of working systems exist.

In an embodiment of the present application, as shown in fig. 6, the electric automobile crane further includes: a get-on operation mechanism 620; the oil pump assembly 630 is connected with the get-on operation mechanism 620 and is used for driving the get-on operation mechanism 620 to operate; a power take-off 640 connected to the transmission 613 and the oil pump assembly 630, respectively, for transmitting power of the transmission 613 to the oil pump assembly 630; the drive axle 650 is connected to the transmission 613 and drives the chassis of the electric automobile crane.

The working conditions of the electric automobile crane comprise an on-board operation and a chassis running operation. When the electric automobile crane works, the second clutch is in an engaged state in an initial state, so that the motor and the transmission are in a communicating state. Under the condition of boarding operation, the power takeoff connected with the speed changer can take force from the speed changer, so that the oil pump assembly can drive the boarding operation mechanism to operate. In the case of chassis running operation, the transmission provides power to the transaxle, thereby driving the chassis of the electric automobile crane. In the case where the target operating mode is the electric-only mode, the all-in-one controller may control the first clutch to be disconnected such that the engine is disconnected from the motor to individually drive the transmission through the motor. That is, in the electric-only mode, the first clutch is disconnected, and the motor can drive the boarding work mechanism alone or the chassis running work. In the case where the target operating mode is the pure fuel mode, the all-in-one controller may control the first clutch to engage such that the engine communicates with the electric machine to drive the transmission through the engine and the electric machine together. That is, in the pure fuel mode, the first clutch is engaged, and the motor and the engine can jointly drive the boarding work mechanism to work or the chassis to run.

Through the technical scheme, the electromagnetic clutch is connected between the engine and the motor, so that the motor and the engine are coupled. When the working mode is switched according to the real-time electric quantity, the driving modes of the engine and the motor can be automatically adjusted through the electromagnetic clutch. The engine and the motor can be driven independently or jointly, so that the technical problem that friction work of the engine needs to be overcome when the motor directly drives the running engine to rotate along with rotation is solved. And a second clutch is connected between the motor and the transmission, and gear shifting operation can be completed by using the second clutch, so that flexible matching of a gearbox system is realized. Under the driving state, the coupling of the motor and the engine is realized by engaging the front electromagnetic clutch, and the torque intervention proportion of the motor can be adjusted according to the load of the engine, so that the fuel utilization rate of the engine is improved. When the motor is on, the front electromagnetic clutch is disconnected, and the rear traditional clutch is engaged, so that the load generated by the engine along with rotation in a pure electric mode can be reduced, and the energy utilization rate of the motor is improved. The oil consumption of the vehicle in an idle state can be reduced through the coordination control of the electromagnetic clutch at the front end of the motor and the clutch at the rear end of the motor. Meanwhile, through automatic control, the power interruption time can be shortened, and the fuel economy in the driving mode is improved.

The embodiment of the application also provides a machine-readable storage medium, on which instructions are stored, the instructions being configured to cause a machine to perform the control method for a hybrid system described above.

The embodiment of the application provides a processor for running a program, wherein the control method for a hybrid power system is executed when the program runs.

In one embodiment, a computer device is provided, which may be a terminal, and the internal structure of which may be as shown in fig. 7. The computer apparatus includes a processor a01, a network interface a02, a display screen a04, an input device a05, and a memory (not shown in the figure) which are connected through a system bus. Wherein the processor a01 of the computer device is adapted to provide computing and control capabilities. The memory of the computer device includes an internal memory a03 and a nonvolatile storage medium a06. The nonvolatile storage medium a06 stores an operating system B01 and a computer program B02. The internal memory a03 provides an environment for the operation of the operating system B01 and the computer program B02 in the nonvolatile storage medium a06. The network interface a02 of the computer device is used for communication with an external terminal through a network connection. The computer program is executed by the processor a01 to implement a control method for a hybrid system. The display screen a04 of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device a05 of the computer device may be a touch layer covered on the display screen, or may be a key, a track ball or a touch pad arranged on a casing of the computer device, or may be an external keyboard, a touch pad or a mouse.

It will be appreciated by those skilled in the art that the structure shown in fig. 7 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

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

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer 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 Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. A control method for a hybrid system, characterized in that the hybrid system includes an engine, a motor, a first clutch, a second clutch, a transmission, and a power battery, the first clutch is an electromagnetic clutch, the first clutch is connected with the engine and the motor, the second clutch is connected with the motor and the transmission, respectively, the second clutch initial state is an engaged state, so that the motor and the transmission are in a communicating state, and the power battery is connected with the motor, the control method comprising:

acquiring the real-time electric quantity of the power battery;

when the target working mode is a pure electric mode, the first clutch is controlled to be disconnected, so that the engine is disconnected from the motor, and the motor is controlled to independently drive the transmission;

and when the target working mode is a pure fuel mode, controlling the first clutch to be meshed, enabling the engine to be communicated with the motor, and controlling the engine to independently drive the transmission.

2. The control method for a hybrid system according to claim 1, characterized in that the control method is applied to an engineering vehicle, the control method further comprising:

acquiring the running speed and the load of the engineering vehicle under the condition that the target working mode is a hybrid power mode;

controlling the first clutch to be engaged under the condition that the running speed is greater than a preset speed threshold value, so as to adjust the intervention proportion of the engine and the motor according to the load and the real-time electric quantity, and enabling the engine and the motor to jointly drive the transmission;

and under the condition that the running speed is less than or equal to the preset speed threshold value, the first clutch is controlled to be disconnected.

3. The control method for a hybrid system according to claim 1, characterized in that the control method further comprises:

and under the condition that the real-time electric quantity is smaller than or equal to a preset electric quantity threshold value and the second clutch is disconnected, controlling the first clutch to be engaged so as to control the engine to drive the motor to generate electricity and charge the power battery.

4. The control method for a hybrid system according to claim 1, wherein the determining a target operation mode of the hybrid system according to the real-time electric quantity includes:

determining a plurality of selectable working modes according to the real-time electric quantity, and displaying the selectable working modes through an interactive interface;

and acquiring a working mode selected by a user through the interactive interface to serve as a target working mode of the hybrid power system.

5. The control method for a hybrid powertrain of claim 4, wherein the determining the selectable operating modes for the user based on the real-time power amount comprises:

under the condition that the real-time electric quantity is smaller than or equal to a preset electric quantity threshold value, the selectable working modes comprise a pure fuel mode;

and when the real-time electric quantity is larger than the preset electric quantity threshold value, determining that the selectable working modes comprise the pure electric mode and the hybrid power mode.

6. The control method for a hybrid system according to claim 1, wherein the control method is applied to an electric automobile crane.

7. The control method for a hybrid system according to claim 6, characterized in that the control method further comprises:

determining whether the crane is in a plugging operation state under the condition that the target working mode is a hybrid power mode or the pure electric mode;

determining the operation power consumption of the on-board operation mechanism under the condition that the crane is in the plug-in operation state;

controlling the power battery to charge under the condition that the operation power consumption is smaller than a preset power consumption threshold value;

and controlling the power battery to drive the boarding operation mechanism to operate under the condition that the operation power consumption is larger than or equal to a preset power consumption threshold.

8. A control device for a hybrid system, characterized by comprising:

a memory configured to store instructions; and

a processor configured to invoke the instructions from the memory and to enable, when executing the instructions, the control method for a hybrid system according to any one of claims 1 to 7.

9. A hybrid system, comprising:

an engine;

a motor;

a transmission;

the power battery is connected with the motor;

the control device for a hybrid system according to claim 8.

10. The hybrid system as set forth in claim 9, further comprising:

and the ISG motor is respectively connected with the engine and the power battery and is used for driving the ISG motor to generate power so as to charge the power battery.

11. An electric car crane comprising a hybrid system according to claim 8 or 9.

12. The electric automobile crane of claim 11, further comprising:

a loading operation mechanism;

the oil pump assembly is connected with the boarding operation mechanism and used for driving the boarding operation mechanism to operate;

the power takeoff is respectively connected with the transmission and the oil pump assembly and is used for transmitting the power of the transmission to the oil pump assembly;

and the driving axle is connected with the speed changer and used for driving the chassis of the electric automobile crane to run.

13. A machine-readable storage medium having stored thereon instructions for causing a machine to perform the control method for a hybrid system according to any one of claims 1 to 7.