CN116142166A

CN116142166A - Vehicle power control method and device, electronic equipment and vehicle

Info

Publication number: CN116142166A
Application number: CN202310318277.8A
Authority: CN
Inventors: 常笑
Original assignee: Honeycomb Drive System Jiangsu Co Ltd
Current assignee: Honeycomb Drive System Jiangsu Co Ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-05-23

Abstract

The invention provides a power control method and device of a vehicle, electronic equipment and the vehicle, wherein the method comprises the following steps: under the working condition that the opening of the accelerator pedal is larger than a first preset value, determining a power mode of the vehicle at present; wherein, the different power modes output power by different combined power sources; executing at least one power source intervention operation based on the current power mode to control the vehicle to gradually increase the output power; wherein, the power source intervened by the previous power source intervention operation is different from the power source intervened by the next power source intervention operation; the intervening power source is different from the power source corresponding to the current power mode. So that the power output of the vehicle is gradually enhanced in the process of starting and accelerating, the problem of power drop is solved, and the power continuity is improved.

Description

Vehicle power control method and device, electronic equipment and vehicle

Technical Field

The present invention relates to the field of vehicle control technologies, and in particular, to a vehicle power control method and apparatus, an electronic device, and a vehicle.

Background

The power architecture of the conventional hybrid vehicle is mostly composed of an engine, a plurality of motors and an automatic gearbox. Under such a power architecture, the power modes of the hybrid vehicle are divided into four kinds as follows: an engine direct-drive mode, an all-electric rear-drive mode, and a series mode.

In the process of large accelerator starting of the hybrid vehicle, the hybrid vehicle is usually started in a pure four-wheel drive mode, and the vehicle power mode is switched from the pure four-wheel drive mode to an engine direct drive mode along with the increase of the vehicle speed. In this process, the motor located in the front axle is required to be changed from the driving state to the engine starting state.

This results in a power dip during the vehicle power mode switching process, and poor power consistency.

Disclosure of Invention

In view of the above, the invention aims to provide a power control method and device for a vehicle, electronic equipment and the vehicle, so as to solve the problems of power drop and poor power consistency in the power mode switching in the starting and accelerating processes of the existing hybrid vehicle.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

a power control method of a vehicle, applied to a hybrid vehicle, the power source of the hybrid vehicle comprising: a plurality of motors and an engine, wherein the plurality of motors includes a motor located at a front axle and a motor located at a rear axle; the method comprises the following steps:

under the working condition that the opening of an accelerator pedal is larger than a first preset value, determining a power mode of the vehicle at present; wherein different ones of said power modes are powered by different combinations of said power sources;

Executing at least one power source intervention operation based on the current power mode to control the vehicle to gradually increase output power; wherein the power source intervened by the previous power source intervention operation is different from the power source intervened by the next power source intervention operation;

wherein the intervening power source is different from the power source corresponding to the current power mode.

Further, the power modes include a rear-drive-only mode, a four-drive-only mode and an engine direct-drive mode; the executing at least one power source intervention operation based on the current power mode comprises the following steps:

and under the condition that the current power mode is the pure electric rear-drive mode, sequentially executing the following power source intervention operation:

the motor positioned in the front axle is intervened, and the motor positioned in the front axle is controlled to output power so as to enable the vehicle to enter the pure electric mode;

the engine is interposed and the engine output power is controlled to bring the vehicle into the engine direct drive mode.

Further, the vehicle comprises a gearbox and a clutch, wherein the clutch is connected with the engine, the motor positioned at the front axle is respectively connected with an input shaft gear of the gearbox and the clutch, and the gearbox comprises a synchronizer;

The intervening the motor positioned at the front axle and controlling the motor positioned at the front axle to output power so as to enable the vehicle to enter the pure four-wheel drive mode, comprising:

controlling the synchronizer to engage with gears and the motor positioned on the front axle to output power;

the engine start is disabled to bring the vehicle into the four-wheel-drive-only mode.

the intervening the engine and controlling the engine output power to put the vehicle into the engine direct drive mode includes:

controlling the clutch to start the engine through a sliding mill;

determining a rotational speed difference between a rotational speed of the engine and a rotational speed of the transmission input shaft;

and under the condition that the rotating speed difference is smaller than a preset threshold value, controlling the clutch to be closed and the engine to output power so as to enable the vehicle to enter the engine direct-drive mode.

Further, after said entering the vehicle into the four-wheel-drive-only mode, the method further comprises: and releasing the prohibition control of the engine start.

and under the condition that the current power mode is the pure four-wheel drive mode, the engine is intervened, and the engine is controlled to output power so as to enable the vehicle to enter the engine direct-drive mode.

Further, the intervening the engine and controlling the engine output power to bring the vehicle into the engine direct drive mode includes:

controlling a clutch to start the engine through a sliding mill;

or controlling the motor positioned at the front axle to start the engine.

Further, the power modes include a rear-drive-only mode, a four-drive-only mode and an engine direct-drive mode; in the case where the current power mode is the electric-only rear-drive mode, the method includes, prior to the performing at least one power-source intervention operation:

detecting whether the vehicle satisfies an intervening operating condition, wherein the intervening operating condition includes at least one of: the electric quantity of the high-voltage battery is larger than a second preset value, the discharge power of the high-voltage battery is larger than a third preset value, and the engine state is a stop state;

And if yes, entering the step of executing at least one power source intervention operation based on the current power mode.

Compared with the prior art, the power control method of the vehicle has the following advantages:

under the working condition that the opening of an accelerator pedal is larger than a first preset value, determining a power mode of the vehicle at present; wherein different ones of said power modes are powered by different combinations of said power sources; executing at least one power source intervention operation based on the current power mode to control the vehicle to gradually increase output power; wherein the power source intervened by the previous power source intervention operation is different from the power source intervened by the next power source intervention operation; wherein the intervening power source is different from the power source corresponding to the current power mode.

Because the intervention operation of the power source is executed at least once based on the current power mode of the vehicle, the power output of the vehicle is gradually enhanced in the starting and accelerating process, the problem of power drop caused by torque cliff change is solved, and the power consistency is greatly improved.

The invention further aims to provide a power control device for a vehicle, which is used for solving the problems of power drop and poor power consistency existing in the power mode switching in the starting and accelerating process of the existing hybrid vehicle.

a power control device of a vehicle, applied to a hybrid vehicle, the power source of the hybrid vehicle comprising: a plurality of motors and an engine, wherein the plurality of motors include a motor located at a front axle and a motor located at a rear axle; the device comprises:

the determining module is used for determining a power mode of the vehicle at present under the working condition that the opening of the accelerator pedal is larger than a first preset value; wherein different ones of said power modes are powered by different combinations of said power sources;

the execution module is used for executing at least one power source intervention operation based on the current power mode so as to control the vehicle to gradually increase output power;

wherein the power source intervened by the previous power source intervention operation is different from the power source intervened by the next power source intervention operation; wherein the intervening power source is different from the power source corresponding to the current power mode.

The power control device of the vehicle has the same advantages as the power control method of the vehicle compared with the prior art, and is not described in detail herein.

The invention further aims to provide electronic equipment so as to solve the problems of power drop and poor power consistency existing in the power mode switching in the starting and accelerating process of the existing hybrid vehicle.

an electronic device, comprising:

a processor, a memory, and a computer program stored on the memory and executable on the processor, the processor implementing any of the control methods described above when executing the program.

The electronic device and the power control method of the vehicle have the same advantages compared with the prior art, and are not described in detail herein.

The invention further aims to provide a vehicle so as to solve the problems of power drop and poor power consistency existing in the power mode switching in the starting and accelerating process of the existing hybrid vehicle.

a vehicle comprising a power control device for performing the power control method of any one of the above vehicles.

The vehicle and the power control method of the vehicle have the same advantages compared with the prior art, and are not described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 is a flowchart showing steps of a power control method of a vehicle according to a first embodiment of the present invention;

FIG. 2 illustrates a power architecture schematic of a hybrid vehicle;

FIG. 3 illustrates a flowchart of power source intervention operation steps with the vehicle currently in a reverse-only mode, in accordance with yet another embodiment of the present invention;

FIG. 4 is a flowchart showing steps for power source intervention operating condition detection in accordance with yet another embodiment of the present invention;

FIG. 5 is a flow chart of a method of controlling power of a vehicle according to still another embodiment of the present invention;

fig. 6 shows a schematic configuration of a power control apparatus for a vehicle according to a second embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other without collision.

Example 1

Hybrid vehicles refer to vehicles equipped with two power sources simultaneously, wherein the two power sources are a thermal power source (e.g., an engine) and an electrical power source (e.g., an electric motor), respectively.

The power mode refers to a mode in which a vehicle power source provides power to maintain the vehicle in operation.

The following describes the operation states of the vehicle components in the above power mode, respectively:

under the condition that the hybrid vehicle is in an engine direct drive mode, the engine runs, the motor at the rear axle drives, the motor at the front axle boosts or generates power, the clutch is in a closed state, and the synchronizer is in a gear engaging state.

Under the condition that the hybrid vehicle is in a pure electric four-wheel drive mode, a motor positioned at a front axle and a motor positioned at a rear axle are driven, the engine is in a flameout state, the clutch is in an open state, and the synchronizer is in a gear engaging state.

Under the condition that the hybrid vehicle is in a pure electric rear drive mode, a motor positioned at a rear axle is driven, a motor positioned at a front axle is in a closed state, an engine is in a flameout state, a clutch is in an open state, and a synchronizer is in a gear-off state.

Under the condition that the hybrid vehicle is in a series mode, the engine runs, the motor at the front axle generates electricity, the motor at the rear axle drives, the clutch is in a closed state, and the synchronizer is in a gear-off state.

In the process of starting and accelerating the hybrid vehicle, the hybrid vehicle is usually started in a pure four-wheel drive mode, and the vehicle power mode is switched from the pure four-wheel drive mode to an engine direct drive mode along with the increase of the vehicle speed. In the process, the motor at the front axle is required to be converted from a driving state to a starting engine state, that is, the motor at the front axle does not output power any more, so that the problem of torque reduction exists in the process of starting the engine, and then the problem of power drop is caused, and the power consistency is poor.

The inventor of the present invention has studied in detail the control method of power mode switching in the starting and accelerating process of a hybrid vehicle to solve the above problems, and has obtained the following possible scheme:

first, in the starting and accelerating process of the hybrid vehicle, the power mode of the vehicle is controlled to be switched from a pure electric rear-drive mode to a series mode, and then is controlled to be switched from the series mode to a direct drive mode. However, the switching process includes actions such as clutch opening and synchronizer gear engaging, which results in long switching time and influences acceleration performance, and the problem of power drop caused by torque drop still occurs after the clutch is opened.

And secondly, in the starting and accelerating process of the hybrid electric vehicle, controlling the power mode of the vehicle to be switched from a pure electric rear-drive mode to a pure electric four-drive mode, and simultaneously starting an engine by using a 12V starter to enter a direct-drive mode. However, this switching mode requires an additional configuration such as a 12V starter, resulting in an increase in the cost of the whole vehicle.

In view of the above, the present inventors have proposed a control method for a power mode in a hybrid vehicle during a start-up acceleration process, which avoids a power dip, improves power consistency, and does not require an increase in cost.

The control method is described in detail below:

referring to fig. 1, fig. 1 shows a flowchart of steps of a power control method of a vehicle according to a first embodiment of the present invention, and as shown in fig. 1, the method is applied to a hybrid vehicle, and includes:

step S101: under the working condition that the opening of an accelerator pedal is larger than a first preset value, determining a power mode of the vehicle at present; wherein different ones of the power modes are powered by different combinations of the power sources.

Referring to fig. 2, fig. 2 shows a schematic power architecture of a hybrid vehicle, and as shown in fig. 2, in an embodiment of the present invention, a power structure of the hybrid vehicle mainly includes the following structures: a plurality of motors, an engine, a gearbox and a clutch (not shown).

Wherein the engine and gearbox are located at the front axle of the vehicle. The plurality of motors includes a motor located at a front axle and a motor located at a rear axle.

The hybrid vehicle further comprises a gearbox and a clutch, wherein the clutch is connected with the engine, and a motor positioned on the front axle is respectively connected with an input shaft gear of the gearbox and the clutch.

The gearbox comprises a synchronizer for enabling gears to be meshed to achieve uniform rotation speed so as to be meshed smoothly.

In one specific implementation, the motor located in the front axle may be a P2.5 motor and the motor located in the rear axle may be a P4 motor.

In the embodiment of the invention, when the power mode switching control of the vehicle is performed, the working condition detection is performed on the vehicle, and the current power mode of the vehicle is determined under the working condition that the opening of the accelerator pedal is larger than a first preset value.

The power mode refers to a mode in which a vehicle power source supplies power to maintain the vehicle running, and different power modes output power from different combinations of power sources.

The power source combination may be one power source or multiple power sources, which is not limited herein.

In a specific implementation, under the working condition that the opening of an accelerator pedal of the vehicle is larger than a first preset value, the vehicle is characterized in a large accelerator starting acceleration state, and then the current power mode of the vehicle can be a pure electric rear-drive mode or a pure electric four-drive mode.

When the current power mode of the vehicle is determined, the vehicle control system firstly generates an acquisition instruction and sends the acquisition instruction to the controller, and the controller acquires the current working conditions of all main working components of the vehicle through a vehicle CAN signal and sends the working conditions to the control system.

The acquired working conditions comprise: engine state, state of motor at front axle, state of motor at rear axle, clutch state, and synchronizer state.

The control system determines the power mode in which the vehicle is currently located based on the received current operating condition of the vehicle, and then performs step S102.

Step S102: and executing at least one power source intervention operation based on the current power mode to control the vehicle to gradually increase output power.

The power source of the hybrid vehicle includes: the system comprises a plurality of motors and an engine, wherein the plurality of motors comprise a motor positioned at a front axle and a motor positioned at a rear axle. Wherein one or more of the plurality of motors outputs power in the case of electromotive force driving; the engine outputs power under the condition of adopting thermal power driving; with hybrid drive, the engine and one or more of the plurality of electric machines jointly output power.

The control system determines the number of times the power source intervention operation is performed and the execution process based on the current power mode of the vehicle. In this way, the control vehicle increases the output power stepwise.

It will be appreciated that there is a power source currently outputting power in the power mode in which the vehicle is currently in, which may be referred to as the current power source.

The power source involved in the power source intervention operation is different from the power source corresponding to the current power mode (current power source). That is, the power source intervention operation is to perform intervention of other power sources on the basis that the current power source maintains the power output, and the power source intervened in the previous power source intervention operation is different from the power source intervened in the next power source intervention operation. After the intervention operation of the power source is performed on the intervention power source, the current power source still keeps a driving state so as to assist and/or generate power.

For example, in the power mode in which the vehicle is currently in, the power source a outputs power, and the power source a is the current power source. The power source intervened by the first power source intervention operation is a power source B, and the power source A still keeps a driving state. The power source intervened by the second power source intervention operation is a power source C, and the power source A and the power source B still keep a driving state at the moment.

Therefore, the output power is gradually increased, the problem of power drop is avoided, and the power consistency is improved; and the intervention operation of the power source is simple and easy to realize, so that the power of the vehicle is correspondingly faster in the starting and accelerating process.

The following describes a process of controlling the gradual switching of the power modes of the vehicle:

the control system determines the number of times the power source intervention operation is performed and the execution process based on the current power mode of the vehicle.

In one implementation, the power mode in which the vehicle is currently located may be a rear-drive-only mode, and may be a four-drive-only mode.

In the case where the vehicle is in the pure electric mode, the power source intervention operation is performed twice on the vehicle. The first power source intervention operation controls the vehicle to enter a pure electric four-drive mode from a pure electric rear-drive mode, and the second power source intervention operation controls the vehicle to enter an engine direct-drive mode from the pure electric four-drive mode.

And under the condition that the vehicle is in the pure four-wheel drive mode, performing a power source intervention operation on the vehicle to control the vehicle to enter an engine direct drive mode from the pure four-wheel drive mode.

The following describes in detail a control method for switching the power mode of the hybrid vehicle under the condition that the current power mode is the pure electric mode:

Referring to fig. 3, fig. 3 shows a flowchart of the steps of the power source intervention operation in the case where the vehicle is currently in the all-electric drive mode according to still another embodiment of the present invention, as shown in fig. 3, including:

step S301: and the motor positioned at the front axle is intervened, and the motor positioned at the front axle is controlled to output power so as to enable the vehicle to enter the pure electric mode.

Step S302: the engine is interposed and the engine output power is controlled to bring the vehicle into the engine direct drive mode.

When the current working condition of the main working part of the vehicle is motor drive positioned at the rear axle, the motor positioned at the front axle is in a closed state, the engine is in a flameout state, the clutch is in an open state, and the synchronizer is in a gear-off state, the current state of the vehicle is determined to be in a pure electric rear drive mode. To control the gradual switching of the vehicle from the all-electric rear-drive mode to the engine direct-drive mode, two power source intervention operations need to be performed.

It can be understood that, in the case that the current power mode of the vehicle is the pure electric rear drive mode, the current power source of the vehicle is the motor located at the rear axle, and when the intervention operation of the power source is performed twice, different power sources are sequentially inserted on the basis that the motor located at the rear axle keeps driving.

Firstly, on the basis that the motor positioned at the rear axle keeps power output, the motor positioned at the front axle is interposed, and the motor positioned at the front axle is controlled to output power, so that the vehicle enters a pure electric four-wheel drive mode from a pure electric rear drive mode.

In the four-wheel drive mode, the states of the main working components of the vehicle are: the motor at the front axle and the motor at the rear axle are driven, the engine is in a flameout state, the clutch is in an open state, and the synchronizer is in a gear engaging state.

Then, the engine is interposed on the basis that the motor located at the rear axle and the motor located at the front axle remain driven, and the engine output power is controlled so that the vehicle enters the engine direct-drive mode from the four-wheel drive mode.

In the engine direct drive mode, the states of the main working components of the vehicle are: the engine runs, the motor positioned at the rear axle drives, the motor positioned at the front axle boosts or generates power, the clutch is in a closed state, and the synchronizer is in a gear engaging state.

After the vehicle enters the engine direct-drive mode, the starting and accelerating process is completed, and the vehicle enters normal running.

In an alternative embodiment, the step S301 includes the following sub-steps A1 to A2:

substep A1: and controlling the synchronizer to engage with gears, and outputting power by the motor positioned on the front axle.

Substep A2: the engine start is disabled to bring the vehicle into the four-wheel-drive-only mode.

The hybrid vehicle comprises a gearbox and a clutch, wherein the clutch is connected with an engine, and a motor positioned on a front axle is respectively connected with an input shaft gear of the gearbox and the clutch; wherein the gearbox comprises a synchronizer.

When the vehicle is in a power mode of pure electric rear-drive, a control system firstly generates a control instruction and sends the control instruction to a controller to control a synchronizer to shift, and after the synchronizer finishes shifting, a motor positioned in a front axle is controlled to output power; and disabling engine starting to cause the vehicle to enter the four-wheel-drive-only mode from the rear-drive-only mode.

Because the synchronizer is required to be controlled to be in gear and the motor positioned at the front axle is required to be controlled to output power in the process of intervention operation of the power source, the engine is required to be prohibited from being started in the process of intervention of the motor positioned at the front axle, so that the motor positioned at the front axle can be prevented from starting the engine by mistake through the clutch after the synchronizer is in gear. If the engine is started by mistake at this time, the vehicle directly enters the engine direct-drive mode from the pure electric rear-drive mode, so that the power is suddenly increased, the power is incoherent, and the driving experience is poor.

In an alternative embodiment, the step S302 includes the following sub-steps B1 to B3:

substep B1: and controlling the clutch to start the engine through a sliding mill.

Substep B2: a rotational speed difference between a rotational speed of the engine and a rotational speed of the transmission input shaft is determined.

Substep B3: and under the condition that the rotating speed difference is smaller than a preset threshold value, controlling the clutch to be closed and the engine to output power so as to enable the vehicle to enter the engine direct-drive mode.

After the vehicle enters the pure four-wheel drive mode from the pure rear-drive mode, a second power source intervention operation is performed on the vehicle, and a control system firstly generates a control instruction and sends the control instruction to a controller so as to control a clutch to start an engine through slipping.

The clutch slip-grinding means a state in which the clutch is gradually closed, and since the engine rotational speed is idle speed control and the input shaft rotational speed (clutch driven end) is small, the clutch cannot complete lockup, and the clutch is maintained in a small-amplitude slip-closed state. The clutch slip mill starts the engine so that the engine speed gradually rises to a proper value and then the engine is locked.

Thus, the problem of power inconsistency caused by the large change of the engine speed is avoided.

After the engine is started, the rotational speed of the engine and the rotational speed of the transmission input shaft are continuously acquired, and the rotational speed difference between the two is calculated. Under the condition that the rotation speed difference is smaller than a preset threshold value, the engine can be judged to be started stably, then the clutch is controlled to be closed, and the engine is controlled to output power so that the vehicle enters an engine direct-drive mode from a pure four-drive mode.

In an alternative embodiment, after said entering said vehicle into said four-wheel-drive-only mode, said method further comprises: and releasing the prohibition control of the engine start.

Referring to fig. 4, fig. 4 is a flowchart showing steps for detecting a power source intervention operation condition according to still another embodiment of the present invention, as shown in fig. 4, including:

step S401: detecting whether the vehicle satisfies an intervening operating condition, wherein the intervening operating condition includes at least one of: the electric quantity of the high-voltage battery is larger than a second preset value, the discharge power of the high-voltage battery is larger than a third preset value, and the engine state is a stop state.

Step S402: and if yes, entering the step of executing at least one power source intervention operation based on the current power mode.

Under the condition that the current power mode of the vehicle is a pure electric rear-drive mode, before the power source intervention operation is executed on the vehicle, the vehicle working condition is required to be detected so as to detect whether the vehicle currently meets the intervention operation condition.

In a case where the vehicle satisfies the intervention operation condition, a power source intervention operation is performed on the vehicle.

When detecting the working condition of the vehicle, the control system firstly generates a detection instruction, and the controller detects the current working condition parameters of the vehicle. Wherein, the operating mode parameters that need to detect include: high-voltage battery power, high-voltage battery discharge power, and current engine status.

Under the condition that the opening of the accelerator pedal is larger than a first preset value, representing that the vehicle is in a large accelerator starting state currently, and under the state, representing that the vehicle motor is driven when the electric quantity of the high-voltage battery is larger than a second preset value and the discharge power of the high-voltage battery is larger than a third preset value; in the event that the engine condition is a shutdown condition, an initial power indicative of vehicle launch will be output by the electric machine.

Under the starting condition, the vehicle can be determined to meet the intervention operation condition, and the intervention operation of the power source is executed for the purpose of quick starting and power continuity so as to enable the vehicle to start and accelerate smoothly and quickly.

If the current working condition parameters of the vehicle do not meet the intervention operation conditions, the intervention operation of the power source is not performed, and the working condition parameters of the vehicle are continuously detected until the intervention conditions are met.

The following describes in detail a control method for switching the power mode of the hybrid vehicle under the condition that the current power mode is the pure four-wheel drive mode:

in an alternative embodiment, the engine is intervened and the engine output power is controlled to bring the vehicle into the engine direct drive mode in the case where the current power mode is the four-wheel drive mode.

When determining the current power mode of the vehicle, firstly acquiring the current working conditions of main working parts of the vehicle, wherein the current working conditions comprise: engine state, state of motor at front axle, state of motor at rear axle, clutch state, and synchronizer state.

Under the conditions that a motor positioned at a front axle and a motor positioned at a rear axle are driven, an engine is in a flameout state, a clutch is in an open state and a synchronizer is in a gear-in state, the current vehicle of the vehicle is determined to be in a pure four-wheel drive mode.

Under the condition that the hybrid vehicle starts in a pure electric four-wheel drive mode, only one power source intervention operation is needed, and on the basis that a motor positioned in a front axle and a motor positioned in a rear axle keep driving, an engine is inserted and the output power of the engine is controlled, so that the vehicle enters an engine direct drive mode.

In an alternative embodiment, the intervening the engine and controlling the engine output power to bring the vehicle into the engine direct drive mode includes:

controlling a clutch to start the engine through a sliding mill;

or controlling the motor positioned at the front axle to start the engine.

When the vehicle starts in the pure four-wheel drive mode, in order to accelerate the vehicle quickly to enter normal running and maintain the consistency of power in the process, a power source intervention operation is needed to control the engine to output power so that the vehicle enters the engine direct drive mode.

In this case, starting the engine includes two ways:

one way is to control the clutch slide to start the engine.

The control system generates a control command and sends the control command to the controller so that the controller controls the clutch to slide and start the engine, and controls the motor positioned at the front axle to be converted into a power-assisted state or a power-generating state from a driving state.

The power output of the vehicle is gradually increased to the complete driving of the engine by the aid of the motor or the power generation of the motor positioned at the front axle, so that the power drop in the process of starting the engine is avoided.

The process of starting the engine by the clutch slide is the same as that of the above embodiment, and will not be described here.

Another way is to control the motor located in the front axle to start the engine.

The control system generates a control command and sends the control command to the controller so that the controller controls the motor positioned on the front axle to unload the current torque and controls the synchronizer to shift.

The clutch is then controlled to close.

And a motor positioned at the front axle drives the engine to rotate until the engine reaches a certain rotating speed and keeps a stable state, so that the engine is started.

In one specific implementation, the two modes of starting the engine as described above are independently applied to the vehicle based on actual demand.

Therefore, the power mode of the vehicle can be quickly converted, and the purpose of quick starting and accelerating of the vehicle is achieved; meanwhile, the opening of a clutch is not involved in the process of starting the engine, so that the problem of power drop is avoided, and the power consistency is improved.

According to the embodiment of the invention, under the working condition that the opening of the accelerator pedal is larger than the first preset value, the current power mode of the vehicle is determined; wherein different ones of said power modes are powered by different combinations of said power sources; executing at least one power source intervention operation based on the current power mode to control the vehicle to gradually increase output power; wherein the power source intervened by the previous power source intervention operation is different from the power source intervened by the next power source intervention operation; wherein the intervening power source is different from the power source corresponding to the current power mode.

The flow of the control method provided by the embodiment of the present invention is described below by way of an example:

referring to fig. 5, fig. 5 shows a flow chart of a control method according to still another embodiment of the present invention, as shown in fig. 5, including:

under the working condition that the opening of an accelerator pedal of the vehicle is larger than a first preset value, representing that the vehicle is in a large accelerator starting acceleration state, firstly acquiring working conditions of main working parts of the vehicle, including: engine state, state of motor at front axle, state of motor at rear axle, clutch state, and synchronizer state.

The vehicle control system generates an acquisition instruction and sends the acquisition instruction to the controller, and the controller acquires the current working conditions of all main working components of the vehicle through a vehicle CAN signal and sends the working conditions to the control system.

Firstly, detecting whether current working condition parameters of a vehicle meet intervention operation conditions, including: the electric quantity of the high-voltage battery is larger than the second preset value, the discharge power of the high-voltage battery is larger than the third preset value, and the engine state is in a stop state. Performing a power source intervention operation if the vehicle meets an intervention operation condition; and continuously detecting if the condition is not met until the condition is met.

The first power source intervention operation is performed, the motor positioned in the front axle is intervened on the basis that the motor positioned in the rear axle keeps driving, the motor positioned in the front axle is controlled to output power, the synchronizer is controlled to be in gear, and the engine is prohibited from being started, so that the vehicle enters a pure electric four-wheel drive mode from a pure electric rear drive mode. And after the vehicle enters the pure electric mode, the control is forbidden to contact the engine.

And the second power source intervention operation is performed, and the engine is inserted on the basis that the motor positioned at the rear axle and the motor positioned at the front axle are kept to be driven. And controlling the clutch to start the engine through a sliding mill, and determining that the engine is started stably when the difference between the rotational speed of the engine and the rotational speed of an input shaft of the gearbox is smaller than a preset threshold value, and controlling the clutch to be closed so as to enable the vehicle to enter an engine direct-drive mode from a pure four-drive mode. At this time, the engine is running, the motor at the rear axle is driven, the motor at the front axle is assisted or generates power, the clutch is in a closed state, and the synchronizer is in a gear state.

When the current working conditions of the main working parts of the vehicle are motor driving at the front axle and motor driving at the rear axle, the engine is in a flameout state, the clutch is in an open state, and the synchronizer is in a gear-in state, the current vehicle of the vehicle is determined to be in a pure electric four-wheel drive mode. To control the vehicle to switch from the four-wheel drive mode to the direct-drive mode of the engine, a power source intervention operation needs to be performed.

The motor is inserted into the engine on the basis that the motor at the rear axle and the motor at the front axle keep driving. The motor at the front axle is used for controlling the clutch to start the engine in a sliding mode, under the condition that the difference between the rotation speed of the engine and the rotation speed of the input shaft of the gearbox is smaller than a preset threshold value, the engine can be judged to be started stably, then the clutch is controlled to be closed, and the engine is controlled to output power, so that the vehicle enters an engine direct-drive mode from a pure four-drive mode. At this time, the engine is running, the motor at the rear axle is driven, the motor at the front axle is assisted or generates power, the clutch is in a closed state, and the synchronizer is in a gear state.

Example two

Referring to fig. 6, fig. 6 shows a schematic structural diagram of a power control device for a vehicle according to a second embodiment of the present invention, as shown in fig. 6, including:

the determining module 601 is configured to determine, under a working condition that an accelerator opening is greater than a first preset value, a power mode in which the vehicle is currently located; wherein different ones of said power modes are powered by different combinations of said power sources;

an execution module 602, configured to execute at least one power source intervention operation based on the current power mode, so as to control the vehicle to gradually increase output power; wherein the power source intervened by the previous power source intervention operation is different from the power source intervened by the next power source intervention operation; wherein the intervening power source is different from the power source corresponding to the current power mode.

In an alternative embodiment, the execution module 602 includes:

the first intervention module is used for intervening the motor positioned in the front axle and controlling the motor positioned in the front axle to output power so as to enable the vehicle to enter the pure electric drive mode;

and the second intervention module is used for intervening the engine and controlling the engine to output power so as to enable the vehicle to enter the engine direct-drive mode.

In an alternative embodiment, the first interventional module comprises:

the first control module is used for controlling the synchronizer to be in gear and the motor positioned at the front axle to output power;

and the first prohibition module is used for prohibiting the engine from starting so as to enable the vehicle to enter the pure four-wheel drive mode.

In an alternative embodiment, the second interventional module comprises:

the second control module is used for controlling the clutch to start the engine through a skid mill;

a first acquisition module for determining a rotational speed difference between a rotational speed of the engine and a rotational speed of the transmission input shaft;

and the third control module is used for controlling the clutch to be closed and the engine to output power under the condition that the rotating speed difference is smaller than a preset threshold value so as to enable the vehicle to enter the engine direct-drive mode.

In an alternative embodiment, the first disabling module includes:

and the release module is used for releasing the prohibition control of the engine starting.

In an alternative embodiment, the execution module 602 further includes:

and the third intervention module is used for intervening the engine and controlling the engine to output power so as to enable the vehicle to enter the engine direct-drive mode under the condition that the current power mode is the pure four-drive mode.

In an alternative embodiment, the third intervention module comprises:

the fourth control module is used for controlling the clutch to start the engine through a sliding mill;

or controlling the motor positioned at the front axle to start the engine.

In an alternative embodiment, the determining module 601 includes:

a detection module for detecting whether the vehicle satisfies an intervening operation condition, wherein the intervening operation condition includes at least one of: the electric quantity of the high-voltage battery is larger than a second preset value, the discharge power of the high-voltage battery is larger than a third preset value, and the engine state is a stop state; if yes, entering a step of executing at least one power source intervention operation based on the current power mode.

Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, including:

a processor, a memory, and a computer program stored on the memory and executable on the processor, the processor implementing the control method of any of the above embodiments when executing the program.

Based on the same inventive concept, an embodiment of the present invention further provides a vehicle including: a power control apparatus of a vehicle for executing the power control method of a vehicle according to any one of the above embodiments.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

For the purposes of simplicity of explanation, the methodologies are shown as a series of acts, but one of ordinary skill in the art will recognize that the present invention is not limited by the order of acts described, as some acts may, in accordance with the present invention, occur in other orders and concurrently. Further, those skilled in the art will recognize that the embodiments described in the specification are all of the preferred embodiments, and that the acts and components referred to are not necessarily required by the present invention.

The power control method, the device, the electronic equipment and the vehicle of the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims

1. A power control method of a vehicle, characterized by being applied to a hybrid vehicle, the power source of the hybrid vehicle comprising: a plurality of motors and an engine, wherein the plurality of motors includes a motor located at a front axle and a motor located at a rear axle; the method comprises the following steps:

2. The method of claim 1, wherein the power modes include a rear-drive-only mode, a four-drive-only mode, and an engine direct-drive mode; the executing at least one power source intervention operation based on the current power mode comprises the following steps:

3. The method of claim 2, wherein the vehicle comprises a gearbox and a clutch, the clutch being connected to the engine, the motor located at the front axle being connected to an input shaft gear of the gearbox and the clutch, respectively, wherein the gearbox comprises a synchronizer;

4. The method of claim 2, wherein the vehicle comprises a gearbox and a clutch, the clutch being connected to the engine, the motor located at the front axle being connected to an input shaft gear of the gearbox and the clutch, respectively, wherein the gearbox comprises a synchronizer;

controlling the clutch to start the engine through a sliding mill;

5. The method of claim 3, wherein after said entering the vehicle into the four-wheel-on-drive mode, the method further comprises: and releasing the prohibition control of the engine start.

6. The method of claim 1, wherein the power modes include a rear-drive-only mode, a four-drive-only mode, and an engine direct-drive mode; the executing at least one power source intervention operation based on the current power mode comprises the following steps:

7. The method of claim 6, wherein the intervening the engine and controlling the engine output power to cause the vehicle to enter the engine direct drive mode comprises:

controlling a clutch to start the engine through a sliding mill;

or controlling the motor positioned at the front axle to start the engine.

8. The method of claim 1, wherein the power modes include a rear-drive-only mode, a four-drive-only mode, and an engine direct-drive mode; in the case where the current power mode is the electric-only rear-drive mode, the method includes, prior to the performing at least one power-source intervention operation:

9. A power control device of a vehicle, characterized by being applied to a hybrid vehicle, a power source of the hybrid vehicle comprising: a plurality of motors and an engine, wherein the plurality of motors include a motor located at a front axle and a motor located at a rear axle; the device comprises:

10. An electronic device, comprising:

a processor, a memory and a computer program stored on the memory and executable on the processor, the processor implementing the control method according to any one of claims 1 to 8 when executing the program.

11. A vehicle characterized in that it comprises power control means for executing the power control method of the vehicle according to any one of the above claims 1 to 8.