CN115285105A

CN115285105A - Hybrid electric vehicle power shortage control method, device, equipment and storage medium

Info

Publication number: CN115285105A
Application number: CN202210972791.9A
Authority: CN
Inventors: 张志强; 翟克宁; 潘文军; 黄真; 马洁高; 覃胤合; 吴颂; 丁磊; 刘永刚; 伍健; 蒋中洲; 聂明勇; 邹姚辉; 蒋涛
Original assignee: Dongfeng Liuzhou Motor Co Ltd
Current assignee: Dongfeng Liuzhou Motor Co Ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2022-11-04
Anticipated expiration: 2042-08-15
Also published as: CN115285105B

Abstract

The invention discloses a power-shortage control method, device, equipment and storage medium for a hybrid electric vehicle, and relates to the technical field of hybrid electric vehicles. The power-lack control method of the hybrid electric vehicle comprises the following steps: when the electric quantity of the power battery is smaller than the first electric quantity, determining the running state of the engine; when the running state of the engine is in a normal state, determining a driving strategy according to the connection state between the engine and the generator, wherein the connection state comprises parallel connection and series connection; and driving the engine according to the driving strategy to improve the electric quantity of the power battery. When the electric quantity of the power battery is low, the power battery is charged in time, the power shortage state is eliminated, the vehicle fault is avoided, and the normal operation of the vehicle is ensured.

Description

Hybrid electric vehicle power shortage control method, device, equipment and storage medium

Technical Field

The invention relates to the technical field of hybrid vehicles, in particular to a hybrid vehicle power-lack control method, device, equipment and storage medium.

Background

For a hybrid electric vehicle system, vehicle faults are easily caused after the power shortage condition occurs. For example, the battery power is reduced continuously during the operation process, which results in the battery power being low and the battery failure, or the battery power is low after the vehicle is left still for a long time, which results in the situation that the whole vehicle cannot be powered on. Therefore, how to prevent the power battery in the hybrid vehicle from being short of power is an urgent technical problem to be solved.

Disclosure of Invention

The invention mainly aims to provide a hybrid electric vehicle power-lack control method, device, equipment and storage medium, and aims to solve the technical problem that vehicle faults are easily caused after a power battery of a hybrid electric vehicle is in a power-lack condition in the prior art.

In order to achieve the purpose, the invention provides a hybrid electric vehicle power-shortage control method, which comprises the following steps:

when the electric quantity of the power battery is smaller than the first electric quantity, determining the running state of the engine;

when the running state of the engine is in a normal state, determining a driving strategy according to the connection state between the engine and a generator, wherein the connection state comprises parallel connection and series connection;

and driving the engine according to the driving strategy so as to increase the electric quantity of the power battery.

Optionally, when the connection state between the engine and the generator is parallel, the driving strategy includes at least one of increasing the engine speed and increasing the engine operating power.

Optionally, when the connection state between the engine and the generator is series, the driving strategy includes increasing the engine operating power.

Optionally, after determining the operating state of the engine when the electric quantity of the power battery is smaller than the first electric quantity, the method further includes:

when the running state of the engine is in a fault state, limiting the power consumption of the vehicle load according to the residual electric quantity of the power battery;

and when the residual electric quantity is smaller than the electric quantity threshold value, starting the engine according to a first starting rotating speed, wherein the first starting rotating speed is smaller than the normal starting rotating speed of the engine.

Optionally, before limiting the power consumption of the vehicle load according to the remaining power of the power battery, the method further includes:

acquiring an ambient temperature;

and correcting the electric quantity of the power battery according to the ambient temperature, and determining the residual electric quantity.

Optionally, after the engine is started at the first starting rotation speed, the method further includes:

and when the starting times of the engine reach preset times and the engine is not started successfully, controlling the power battery to stop supplying power.

Optionally, the hybrid electric vehicle power shortage control method further includes:

when the electric quantity of the power battery is smaller than a second electric quantity, adjusting the connection state between the engine and the generator to be in series connection;

and starting the engine according to a second starting rotating speed, wherein the second electric quantity is less than the first electric quantity, and the second starting rotating speed is less than the normal starting rotating speed of the engine.

In order to achieve the above object, the present invention further provides a hybrid vehicle power-loss control device, including:

the detection module is used for determining the running state of the engine when the electric quantity of the power battery is smaller than the first electric quantity;

the analysis module is used for determining a driving strategy according to the connection state between the engine and the generator when the running state of the engine is in a normal state, wherein the connection state comprises parallel connection and series connection;

and the driving module is used for driving the engine according to the driving strategy so as to improve the electric quantity of the power battery.

In addition, to achieve the above object, the present invention also provides a power shortage control apparatus for a hybrid vehicle, including: the hybrid electric vehicle power shortage control method comprises a memory, a processor and a hybrid electric vehicle power shortage control program which is stored on the memory and can run on the processor, wherein when the processor executes the hybrid electric vehicle power shortage control program, the hybrid electric vehicle power shortage control method is realized.

In order to achieve the above object, the present invention further provides a storage medium storing a hybrid vehicle power-loss control program, which when executed by a processor, implements the hybrid vehicle power-loss control method as described above.

In the invention, when the electric quantity of the power battery is smaller than a first electric quantity, the running state of the engine is determined; when the running state of the engine is in a normal state, determining a driving strategy according to the connection state between the engine and the generator, wherein the connection state comprises parallel connection and series connection; driving the engine according to a driving strategy to improve the electric quantity of the power battery; therefore, when the electric quantity of the power battery is low, the power battery is charged in time, the power shortage state is eliminated, the vehicle fault is avoided, and the normal operation of the vehicle is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a hybrid electric vehicle power-shortage control device in a hardware operating environment according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart illustrating a power-loss control method for a hybrid electric vehicle according to a first embodiment of the present invention;

FIG. 3 is a schematic flow chart of a second embodiment of a power-loss control method for a hybrid electric vehicle according to the present invention;

fig. 4 is a block diagram of the electric power shortage control device of the electric vehicle according to the embodiment of the invention.

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a hybrid electric vehicle power-deficiency control device in a hardware operating environment according to an embodiment of the present invention.

As shown in fig. 1, the hybrid vehicle power-deficient control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to implement connection communication among these components. The user interface 1003 may include a Display screen (Display), and the optional user interface 1003 may further include a standard wired interface and a wireless interface, and the wired interface for the user interface 1003 may be a USB interface in the present invention. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory or a Non-volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.

Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of hybrid electric vehicle loss control devices, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

As shown in fig. 1, a memory 1005, identified as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a hybrid vehicle power-loss control program.

In the hybrid electric vehicle power-shortage control device shown in fig. 1, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting user equipment; the hybrid electric vehicle power-shortage control device calls a hybrid electric vehicle power-shortage control program stored in the memory 1005 through the processor 1001 and executes the hybrid electric vehicle power-shortage control method provided by the embodiment of the invention.

Based on the hardware structure, the embodiment of the power-shortage control method of the hybrid electric vehicle is provided.

Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for controlling the power shortage of the hybrid electric vehicle according to the present invention, and provides the first embodiment of the method for controlling the power shortage of the hybrid electric vehicle according to the present invention.

In a first embodiment, the hybrid electric vehicle power shortage control method comprises the following steps:

step S10: and when the electric quantity of the power battery is smaller than the first electric quantity, determining the running state of the engine.

It should be understood that the main execution body of this embodiment is the hybrid electric vehicle power-lack control device, which has the functions of data processing, data communication, program operation, and the like, and the hybrid electric vehicle power-lack control device may be a vehicle controller, and of course, may also be other devices with similar functions, which is not limited in this embodiment.

The charge of the power battery may be SOC (state of charge), expressed in percentage. The power battery can be provided with an SOC detection device, and the SOC detection device can calculate the electric quantity of the power battery by using parameters such as current or voltage of the power battery. And the vehicle control unit is connected with the SOC detection equipment and determines the electric quantity of the power battery according to the electric quantity data fed back by the SOC detection equipment. The SOC detection of the power battery has a mature technology, and the detailed description of the embodiment is omitted here.

The first electric quantity is a boundary for judging whether the electric quantity of the power battery is sufficient, and when the electric quantity of the power battery is smaller than the first electric quantity, the electric quantity of the power battery is insufficient, and power shortage occurs. In order to avoid the adverse effect of continuous power shortage on the running of the vehicle, the electric quantity of the power battery needs to be charged. For example, the first value may be 50% or 40%, and the specific value may be set according to the requirement, which is not limited in this embodiment.

The operation state of the engine includes a normal state and a fault state, wherein the engine in the normal state can normally operate, and the engine in the fault state cannot operate. The electric quantity of a power battery in the hybrid electric vehicle is provided by a generator, and the generator is driven by an engine. The operating state of the engine therefore determines the ability to charge the power battery. The vehicle control unit can be connected with the control unit of the generator, and the running state of the engine is determined by receiving the state signal fed back by the control unit of the generator. For example, the status signal may be divided into a high level and a low level; wherein, the high level indicates that the operation state of the engine is in a normal state, and the low level indicates that the operation state of the engine is in a fault state.

Step S20: when the running state of the engine is in a normal state, determining a driving strategy according to the connection state between the engine and the generator, wherein the connection state comprises parallel connection and series connection.

The connection state of the engine and the generator in the hybrid vehicle includes parallel connection and series connection. In the parallel state, one part of the output of the engine drives the generator to generate electricity, and the other part of the output of the engine is used for driving the motor; in the series state, the output of the engine is fully used to drive the generator to generate electricity.

In the present embodiment, the connection state of the engine and the generator can be adjusted as required. Specifically, a clutch can be arranged between an output shaft of the engine and an output shaft of the motor, and when the clutch is in a separation state, the engine is only connected with the generator and is in a series connection state; when the clutch is in a combined state, the engine is simultaneously connected with the generator and the motor and is in a parallel state.

The vehicle control unit can control the connection state of the engine and the generator to switch between parallel connection and series connection by controlling the state of the clutch. Generally, when the vehicle speed is low, series connection can be adopted; when the vehicle speed is high, parallel connection can be adopted.

When the running state of the engine is in a normal state, the engine can be normally driven. At this time, the output of the engine can be increased to increase the power generation amount of the generator, thereby increasing the electric quantity of the power battery. The energy transmission mode is different because the connection state of the engine and the generator is in parallel connection and series connection. And therefore different driving strategies need to be employed for driving.

The driving strategy refers to a mode of adjusting control parameters of the engine, such as increasing the engine speed, increasing the engine power and the like. When the connection state between the engine and the generator is in parallel, the driving strategy may include at least one of increasing the engine speed and increasing the engine operating power. Since a part of the engine is used to drive the motor in the parallel state, the output cannot be increased by increasing the rotation speed of the engine. The driving strategy includes increasing the engine operating power when the connection between the engine and the generator is in series. Of course, the driving strategy may also be set according to the requirement, and this embodiment is not described herein again.

Step S30: and driving the engine according to a driving strategy to improve the electric quantity of the power battery.

And after the driving strategy is determined, controlling the engine according to the control parameters in the driving strategy to improve the output of the engine. When the difference between the parameters in the driving strategy and the original parameters of the engine is large, in order to avoid the oscillation caused by the output mutation, the engine can be controlled by adopting a gradually increasing mode. For example, when the engine speed is increased, the engine speed can be increased by 500r/min each time.

In order to avoid frequent charging, the driving strategy may set the charge of the power battery after the current charging to a higher value, such as 70% or 75%. And after the electric quantity of the power battery reaches the set electric quantity, restoring the control parameters of the engine to the original control parameters.

When the electric quantity of the power battery is charged, the electric quantity of the power battery can be rapidly increased, and the electric quantity of a load in the vehicle can be limited. For example, the power of the vehicle air conditioner and the like are limited. Specifically, the limit degree of the load may be set according to the SOC, for example, when the SOC is 45% to 50%, the power limit amplitude is 20%; the power limit amplitude is 40% when the SOC is 40% -45%. The above numerical values are merely examples, and specific values thereof may be set according to requirements, which is not limited in this embodiment.

In the first embodiment, the running state of the engine is determined when the electric quantity of the power battery is smaller than the first electric quantity; when the running state of the engine is in a normal state, determining a driving strategy according to the connection state between the engine and the generator, wherein the connection state comprises parallel connection and series connection; driving the engine according to a driving strategy to improve the electric quantity of the power battery; therefore, when the electric quantity of the power battery is low, the power battery is charged in time, the power shortage state is eliminated, the vehicle fault is avoided, and the normal operation of the vehicle is ensured.

Referring to fig. 3, fig. 3 is a schematic flow chart of a hybrid electric vehicle power shortage control method according to a second embodiment of the present invention.

In the second embodiment, step S10 may be followed by:

step S40: when the running state of the engine is in a fault state, the power consumption of the vehicle load is limited according to the residual capacity of the power battery.

When the running state of the engine is in a fault state, it indicates that the engine cannot be started immediately, and at this time, in order to avoid the deterioration of the power shortage state, the power consumption of the vehicle load needs to be limited so as to slow down the power consumption speed of the power battery. Wherein the vehicle load can guarantee the vehicle-mounted air conditioner, the motor driving power and the like.

Specifically, the degree of limitation of the amount of electricity used by the vehicle load may be determined based on the vehicle speed and the amount of remaining electricity. When the vehicle speed is higher, the electric quantity consumption is larger, and a larger limit degree can be adopted to slow down the electric quantity consumption speed; when the vehicle speed is low, it means that the power consumption is small, and a small degree of limitation may be adopted. The larger the SOC, the more the remaining amount of electricity is described, and the degree of limitation of the amount of electricity used by the vehicle load may be increased as the SOC is decreased. For example, at a SOC of 45% to 50%, the power limit magnitude is 20%; the power limit amplitude is 40% when the SOC is 40% -45%.

In the present embodiment, to ensure the accuracy of SOC, the ambient temperature may be acquired; and correcting the electric quantity of the power battery according to the environment temperature, and determining the residual electric quantity.

The ambient temperature refers to the temperature of the environment outside the vehicle. The vehicle shell can be provided with a temperature sensor, the vehicle control unit is connected with the temperature sensor, and the ambient temperature outside the vehicle is determined by receiving a detection signal fed back by the temperature sensor. Or the vehicle control unit is connected with the meteorological database, and the environment temperature is determined by searching the meteorological data of the region where the vehicle is located in the meteorological database.

During specific implementation, electric quantity state models of the battery pack at different temperatures can be established through historical data, and corresponding residual electric quantity is determined from the electric quantity state models according to the environment temperature.

Furthermore, the actual effect of the same power is not the same since the vehicle is at different temperatures. Therefore, the degree of limitation of the load can be corrected in accordance with the ambient temperature. For example, when the ambient temperature is low, the limit degree of the air conditioner may be appropriately reduced to ensure the user's demand. If the SOC is 45% -50% and the ambient temperature is 20 ℃, the power limiting amplitude of the air conditioner is 20%; if the ambient temperature is 10 ℃, the power limit amplitude of the air conditioner is 15%.

Step S50: and when the residual electric quantity is less than the electric quantity threshold value, starting the engine according to a first starting rotating speed, wherein the first starting rotating speed is less than the normal starting rotating speed of the engine.

The cause of the failure of the engine may be a hardware failure or a temporary stop caused by external factors. Since there is a possibility that the engine may be recovered when it is out of order due to an external factor, it is possible to attempt to restart the engine in order to avoid deterioration of the power shortage state.

At the time of restart, the start may be performed in accordance with the normal start condition of the engine. If the attempt to start the system fails, the start condition can be reduced and the system can be started again. For example, if the normal starting condition of the engine is 1000r/min, an attempt may be made to start at 800r/min to increase the starting success rate.

And when the starting times of the engine reach the preset times and the engine is not started successfully, controlling the power battery to stop supplying power. The preset number of times may be 3 times, 4 times, etc. After the engine is started for a plurality of times and cannot be successfully started, the engine has serious faults, and the high voltage below the power battery can be controlled at the moment to stop the vehicle to repair the vehicle, so that safety accidents caused by abnormal conditions of the vehicle are avoided.

In the embodiment, in order to avoid that the battery is insufficient after the vehicle is left standing for a long time, the engine can be started in a maintenance mode, and the power battery can be charged. Specifically, when the electric quantity of the power battery is smaller than the second electric quantity, the connection state between the engine and the generator is adjusted to be in series connection; and starting the engine according to a second starting rotating speed, wherein the second electric quantity is less than the first electric quantity, and the second starting rotating speed is less than the normal starting rotating speed of the engine.

The second charge may be 10% or 5%, and direct start of the vehicle may result in a situation where the power battery is depleted due to too high a charge, due to too low a charge on the battery. Therefore, the vehicle can be operated after the engine is tried to be started to generate power. In order to start the engine, the engine can be started at a lower starting speed, for example, the second starting speed can be 400r/min. And when the rotating speed of the engine reaches 400r/min, forcibly controlling oil injection to start the engine.

In the second embodiment, when the operating state of the engine is in a failure state, the amount of electricity used by the vehicle load is limited according to the remaining amount of electricity of the power battery; when the residual electric quantity is smaller than the electric quantity threshold value, starting the engine according to a first starting rotating speed, wherein the first starting rotating speed is smaller than the normal starting rotating speed of the engine; therefore, under the condition that the power battery cannot be immediately charged, the consumption speed of electric quantity is controlled, the starting condition of the engine is reduced, the engine is tried to be restarted for power generation, the deterioration of the power shortage state is relieved, and the fault of the power battery is avoided.

In addition, an embodiment of the present invention further provides a storage medium, where the storage medium stores a hybrid electric vehicle power shortage control program, and when the hybrid electric vehicle power shortage control program is executed by a processor, the hybrid electric vehicle power shortage control program implements the steps of the hybrid electric vehicle power shortage control method described above.

Since the storage medium may adopt the technical solutions of all the embodiments, at least the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not described in detail herein.

Referring to fig. 4, fig. 4 is a block diagram showing a configuration of a power-loss control device for an electric vehicle according to an embodiment of the present invention. The embodiment of the invention also provides a power-shortage control device of the hybrid electric vehicle.

In the present embodiment, the hybrid vehicle power shortage control device includes:

the detection module 100 is configured to determine an operating state of the engine when the electric quantity of the power battery is less than a first electric quantity.

The charge of the power battery can be SOC (state of charge), expressed in percentage. The power battery can be provided with an SOC detection device, and the SOC detection device can calculate the electric quantity of the power battery by using parameters such as current or voltage of the power battery. The detection module 100 is connected with the SOC detection device, and determines the electric quantity of the power battery according to the electric quantity data fed back by the SOC detection device. The SOC detection of the power battery is a mature technology, and the detailed description of the embodiment is omitted here.

The first electric quantity is a boundary for judging whether the electric quantity of the power battery is sufficient, and when the electric quantity of the power battery is smaller than the first electric quantity, the electric quantity of the power battery is insufficient, and the power shortage occurs. In order to avoid the adverse effect of continuous power shortage on the running of the vehicle, the electric quantity of the power battery needs to be charged. For example, the first value may be 50% or 40%, and the specific value may be set according to the requirement, which is not limited in this embodiment.

The operation state of the engine includes a normal state and a fault state, wherein the engine in the normal state can normally operate, and the engine in the fault state cannot operate. The electric quantity of a power battery in the hybrid vehicle is provided by a generator, and the generator is driven by an engine. The operating state of the engine therefore determines the ability to charge the power battery. The detection module 100 may be connected to a control unit of the generator, and determine the operating state of the engine by receiving a state signal fed back from the control unit of the generator. For example, the status signal may be divided into a high level and a low level; wherein, the high level indicates that the operation state of the engine is in a normal state, and the low level indicates that the operation state of the engine is in a fault state.

The analysis module 200 is used for determining a driving strategy according to the connection state between the engine and the generator when the running state of the engine is in a normal state, wherein the connection state comprises parallel connection and series connection.

In the present embodiment, the connection state of the engine and the generator can be adjusted as needed. Specifically, a clutch can be arranged between an output shaft of the engine and an output shaft of the motor, and when the clutch is in a separation state, the engine is only connected with the generator and is in a series connection state; when the clutch is in a combined state, the engine is simultaneously connected with the generator and the motor and is in a parallel state.

The analysis module 200 may control the connection state of the engine and the generator to switch between parallel and series by controlling the state of the clutch. Generally, when the vehicle speed is low, series connection can be adopted; when the vehicle speed is high, parallel connection can be adopted.

The driving strategy refers to a mode of adjusting a control parameter of the engine, such as increasing the engine speed, increasing the engine power, and the like. When the connection state between the engine and the generator is in parallel, the driving strategy may include at least one of increasing the engine speed and increasing the engine operating power. In the parallel state, a part of the engine is used to drive the motor, and therefore, the output cannot be increased by increasing the rotation speed of the engine. The driving strategy includes increasing the engine operating power when the connection between the engine and the generator is in series. Of course, the driving strategy may also be set according to the requirement, and this embodiment is not described herein again.

And the driving module 300 is used for driving the engine according to a driving strategy so as to improve the electric quantity of the power battery.

And after the driving strategy is determined, controlling the engine according to the control parameters in the driving strategy to improve the output of the engine. When the difference between the parameters in the driving strategy and the original parameters of the engine is large, the engine can be controlled by adopting a gradually-improved mode in order to avoid the oscillation caused by the output mutation. For example, when the engine speed is increased, the engine speed can be increased by 500r/min each time.

In the embodiment, the detection module 100 determines the operation state of the engine by when the electric quantity of the power battery is less than the first electric quantity; when the running state of the engine is in a normal state, the analysis module 200 determines a driving strategy according to the connection state between the engine and the generator, wherein the connection state comprises parallel connection and series connection; the driving module 300 drives the engine according to a driving strategy to increase the electric quantity of the power battery; therefore, when the electric quantity of the power battery is low, the power battery is charged in time, the power shortage state is eliminated, the vehicle fault is avoided, and the normal operation of the vehicle is ensured.

In one embodiment, the driving module 300 is further configured to limit the power consumption of the vehicle load according to the remaining power of the power battery when the operating state of the engine is in a failure state; and when the residual electric quantity is smaller than the electric quantity threshold value, starting the engine according to a first starting rotating speed, wherein the first starting rotating speed is smaller than the normal starting rotating speed of the engine.

In one embodiment, the detection module 100 is further configured to obtain an ambient temperature; the analysis module 200 is further configured to correct the electric quantity of the power battery according to the ambient temperature, and determine the remaining electric quantity.

In an embodiment, the driving module 300 is further configured to control the power battery to stop supplying power when the number of engine starts reaches a preset number and the engine starts unsuccessfully.

In one embodiment, the driving module 300 is further configured to adjust the connection state between the engine and the generator to be in series when the electric quantity of the power battery is less than a second electric quantity; and starting the engine according to a second starting rotating speed, wherein the second electric quantity is less than the first electric quantity, and the second starting rotating speed is less than the normal starting rotating speed of the engine.

Other embodiments or specific implementation manners of the power-shortage control device of the hybrid electric vehicle can refer to the above method embodiments, so that the power-shortage control device at least has all the beneficial effects brought by the technical scheme of the above embodiments, and further description is omitted here.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments. In the unit claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order, but rather the words first, second, third, etc. are to be interpreted as names.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (such as a Read Only Memory image (ROM)/Random Access Memory (RAM), a magnetic disk, and an optical disk), and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The hybrid electric vehicle power-shortage control method is characterized by comprising the following steps:

2. A hybrid vehicle power deficit control method according to claim 1, wherein the drive strategy includes at least one of increasing an engine speed and increasing an engine running power when the connection state between the engine and the generator is parallel.

3. A hybrid vehicle power deficit control method according to claim 1, wherein said drive strategy includes increasing engine operating power when the connection state between the engine and the generator is series.

4. A hybrid vehicle power-deficiency control method according to any one of claims 1-3, wherein, after determining the operating state of the engine when the electric quantity of the power battery is less than the first electric quantity, further comprising:

5. A hybrid electric vehicle power shortage control method according to claim 4, wherein before limiting the amount of power used by the vehicle load in accordance with the remaining amount of power of the power battery, further comprising:

acquiring an ambient temperature;

6. The hybrid vehicle power-deficient control method according to claim 4, further comprising, after starting said engine at a first cranking rotation speed:

7. The hybrid vehicle power-deficient control method according to any one of claims 1 to 3, further comprising:

8. The utility model provides a hybrid electric vehicle insufficient voltage controlling means which characterized in that, hybrid electric vehicle insufficient voltage controlling means includes:

9. A hybrid vehicle power-deficient control apparatus, characterized in that it comprises: memory, a processor and a hybrid electric vehicle power-deficit control program stored on the memory and executable on the processor, which when executed by the processor implements the hybrid electric vehicle power-deficit control method according to any one of claims 1 to 7.

10. A storage medium having stored thereon a hybrid vehicle power-deficit control program that, when executed by a processor, implements a hybrid vehicle power-deficit control method according to any one of claims 1 to 7.