A power control method and device of a vehicle, an electronic device, and a vehicle

Abstract

The application provides a power control method and device of a vehicle, electronic equipment and the vehicle, and comprises the following steps: determining a power mode in which the vehicle currently locates under the condition that the opening degree of an accelerator pedal is greater than a first preset value; different power modes are output by different combinations of power sources; performing at least one power source intervention operation based on the current power mode to control the vehicle to gradually increase the output power; the power source intervened by the last power source intervention operation is different from the power source intervened by the next power source intervention operation; and the intervened power source is different from the power source corresponding to the current power mode. In this way, the power output of the vehicle is gradually increased in the process of starting acceleration, the problem of power dip is solved, and the power continuity is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a vehicle power control method, device, electronic equipment, and vehicle. Background Technology

[0002] The current hybrid vehicle powertrain architecture mostly consists of an engine, multiple electric motors, and an automatic transmission. Under this powertrain architecture, hybrid vehicles have four power modes: engine direct drive mode, pure electric four-wheel drive mode, pure electric rear-wheel drive mode, and series mode.

[0003] During a full-throttle start-up in a hybrid vehicle, it typically starts in pure electric four-wheel drive mode. As the vehicle speed increases, the power mode switches from pure electric four-wheel drive to engine direct drive mode. During this process, the motor located on the front axle needs to switch from drive mode to engine start mode.

[0004] This results in a power drop during the vehicle's power mode switching process, leading to poor power continuity. Summary of the Invention

[0005] In view of this, the present invention aims to provide a vehicle power control method, device, electronic device and vehicle to solve the problems of power drop and poor power continuity during the power mode switching process of current hybrid vehicles during start-up and acceleration.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A power control method for a vehicle, applied to a hybrid vehicle, wherein the power source of the hybrid vehicle includes: a plurality of motors and an engine, wherein the plurality of motors includes a motor located on the front axle and a motor located on the rear axle; the method includes:

[0008] When the accelerator pedal opening is greater than a first preset value, the current power mode of the vehicle is determined; wherein, different power modes are output by different combinations of power sources.

[0009] Based on the current power mode, at least one power source intervention operation is performed to control the vehicle to gradually increase the output power; wherein 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.

[0010] The power source used for intervention is different from the power source corresponding to the current power mode.

[0011] Furthermore, the power modes include pure electric rear-wheel drive mode, pure electric four-wheel drive mode, and engine direct drive mode; the step of performing at least one power source intervention operation based on the current power mode includes:

[0012] When the current power mode is the pure electric rear-wheel drive mode, the following power source intervention operations are performed sequentially:

[0013] The motor located on the front axle is engaged, and the motor located on the front axle is controlled to output power so that the vehicle enters the pure electric four-wheel drive mode;

[0014] Intervene the engine and control its output power to put the vehicle into engine direct drive mode.

[0015] Furthermore, the vehicle includes a transmission and a clutch, the clutch being connected to the engine, and the motor located on the front axle being connected to the input shaft gear of the transmission and the clutch, wherein the transmission includes a synchronizer;

[0016] The step of intervening in the motor located on the front axle and controlling the output power of the motor located on the front axle to enable the vehicle to enter the pure electric four-wheel drive mode includes:

[0017] Control the synchronizer to engage gears and the motor located on the front axle to output power;

[0018] The engine is prevented from starting so that the vehicle enters the pure electric four-wheel drive mode.

[0019] Furthermore, the vehicle includes a transmission and a clutch, the clutch being connected to the engine, and the motor located on the front axle being connected to the input shaft gear of the transmission and the clutch, wherein the transmission includes a synchronizer;

[0020] The intervention of the engine and control of the engine output power to put the vehicle into the engine direct drive mode includes:

[0021] Control the clutch to slip and start the engine;

[0022] Determine the speed difference between the engine speed and the gearbox input shaft speed;

[0023] When the speed difference is less than a preset threshold, the clutch is controlled to close and the engine outputs power so that the vehicle enters the engine direct drive mode.

[0024] Furthermore, after putting the vehicle into the pure electric four-wheel drive mode, the method further includes: releasing the control that prohibits the engine from starting.

[0025] Furthermore, the power modes include pure electric rear-wheel drive mode, pure electric four-wheel drive mode, and engine direct drive mode; the step of performing at least one power source intervention operation based on the current power mode includes:

[0026] When the current power mode is the pure electric four-wheel drive mode, the engine is engaged and the engine output power is controlled to enable the vehicle to enter the engine direct drive mode.

[0027] Furthermore, the intervention of the engine and control of the engine output power to put the vehicle into the engine direct drive mode includes:

[0028] The engine is started by controlling clutch slippage;

[0029] Alternatively, control the motor located on the front axle to start the engine.

[0030] Further, the power modes include a pure electric rear-wheel drive mode, a pure electric four-wheel drive mode, and an engine direct drive mode; when the current power mode is the pure electric rear-wheel drive mode, before performing at least one power source intervention operation, the method includes:

[0031] The system detects whether the vehicle meets the intervention operation conditions, wherein the intervention operation conditions include at least one of the following conditions: the high-voltage battery charge is greater than a second preset value, the high-voltage battery discharge power is greater than a third preset value, and the engine is in a stopped state.

[0032] If the conditions are met, then proceed to the step of performing at least one power source intervention operation based on the current power mode.

[0033] Compared with existing technologies, the vehicle power control method of the present invention has the following advantages:

[0034] This invention determines the current power mode of the vehicle when the accelerator pedal opening is greater than a first preset value; wherein different power modes are output by different combinations of power sources; based on the current power mode, at least one power source intervention operation is performed to control the vehicle to gradually increase the output power; wherein 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; wherein the intervened power source is different from the power source corresponding to the current power mode.

[0035] By performing at least one power source intervention operation based on the vehicle's current power mode, the power output gradually increases during the vehicle's start-up and acceleration process, eliminating the problem of power drop caused by sudden torque changes, thus greatly improving the continuity of power.

[0036] Another objective of this invention is to provide a vehicle power control device to solve the problems of power drop-off and poor power continuity during the power mode switching process of current hybrid vehicles during start-up and acceleration.

[0037] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0038] A power control device for 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 on the front axle and a motor located on the rear axle; the device comprises:

[0039] The determination module is used to determine the current power mode of the vehicle when the accelerator pedal opening is greater than a first preset value; wherein different power modes are output by different combinations of power sources.

[0040] The execution module is used to perform at least one power source intervention operation based on the current power mode, so as to control the vehicle to gradually increase the output power;

[0041] The power source involved in the previous power source intervention operation is different from the power source involved in the next power source intervention operation; and the intervened power source is different from the power source corresponding to the current power mode.

[0042] The vehicle power control device and the vehicle power control method described above have the same advantages over the prior art, and will not be elaborated here.

[0043] Another objective of this invention is to provide an electronic device to solve the problems of power drop-off and poor power continuity during the power mode switching process of current hybrid vehicles at start-up and acceleration.

[0044] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0045] An electronic device, comprising:

[0046] A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements any of the control methods described above.

[0047] The electronic device described above has the same advantages over the prior art as the vehicle power control method described above, and will not be elaborated here.

[0048] Another objective of this invention is to provide a vehicle that solves the problems of power dips and poor power continuity during the starting and acceleration process of current hybrid vehicles.

[0049] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0050] A vehicle includes a power control device for performing any of the above-described power control methods for a vehicle.

[0051] The power control method of the vehicle described above has the same advantages over the prior art, and will not be repeated here. Attached Figure Description

[0052] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0053] Figure 1 A flowchart illustrating the steps of a vehicle power control method according to Embodiment 1 of the present invention is shown.

[0054] Figure 2 A schematic diagram of the powertrain architecture of a hybrid vehicle is shown.

[0055] Figure 3 This invention illustrates a flowchart of the power source intervention steps in a vehicle currently in pure electric rear-wheel drive mode, according to another embodiment of the present invention.

[0056] Figure 4 A flowchart illustrating the steps of detecting power source intervention operating conditions according to another embodiment of the present invention is shown.

[0057] Figure 5 A schematic flowchart of a vehicle power control method according to another embodiment of the present invention is shown;

[0058] Figure 6 A schematic diagram of the structure of a vehicle power control device according to Embodiment 2 of the present invention is shown. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0061] Example 1

[0062] Hybrid vehicles are vehicles equipped with two power sources, namely a thermal power source (such as an engine) and an electric power source (such as an electric motor).

[0063] The current hybrid vehicle powertrain architecture mostly consists of an engine, multiple electric motors, and an automatic transmission. Under this powertrain architecture, hybrid vehicles have four power modes: engine direct drive mode, pure electric four-wheel drive mode, pure electric rear-wheel drive mode, and series mode.

[0064] The power mode refers to the mode in which the vehicle's power source provides power to maintain vehicle operation.

[0065] The working states of vehicle components under the above power modes are described below:

[0066] When the hybrid vehicle is in engine direct drive mode, the engine is running, the electric motor located on the rear axle is driving, the electric motor located on the front axle is assisting or generating electricity, the clutch is in the closed state, and the synchronizer is in the gear state.

[0067] When the hybrid vehicle is in pure electric four-wheel drive mode, the motors located on the front axle and the rear axle drive the vehicle, the engine is off, the clutch is open, and the synchronizer is engaged.

[0068] When the hybrid vehicle is in pure electric rear-wheel drive mode, the motor located on the rear axle is driven, the motor located on the front axle is turned off, the engine is shut off, the clutch is open, and the synchronizer is disengaged.

[0069] When a hybrid vehicle is in series mode, the engine is running, the motor on the front axle generates electricity, the motor on the rear axle drives the vehicle, the clutch is engaged, and the synchronizer is disengaged.

[0070] During the initial acceleration of a hybrid vehicle, it typically starts in pure electric four-wheel drive mode. As the vehicle speed increases, the power mode switches from pure electric four-wheel drive to engine direct drive mode. During this process, the motor located on the front axle needs to switch from driving mode to engine starting mode. In other words, the motor on the front axle no longer outputs power, which leads to a reduction in torque during engine starting, resulting in a power drop and poor power continuity.

[0071] To address the aforementioned problems, the inventors conducted a detailed study on the control method for power mode switching during the start-up and acceleration process of hybrid vehicles, and obtained the following feasible solution:

[0072] The first method involves controlling the hybrid vehicle's power mode during start-up and acceleration, switching from pure electric rear-wheel drive mode to series mode, and then back to direct drive mode. However, this switching process involves actions such as clutch disengagement and synchronizer engagement, resulting in a longer switching time and affecting acceleration performance. Furthermore, even after disengaging the clutch, a drop in torque can still occur, causing a power slump.

[0073] The second approach involves switching the hybrid vehicle's power mode from pure electric rear-wheel drive to pure electric four-wheel drive during acceleration, while simultaneously using a 12V starter to start the engine and enter direct drive mode. However, this mode switching requires additional components such as a 12V starter, increasing the overall vehicle cost.

[0074] In view of this, the inventors propose a method for controlling the power mode during the start-up and acceleration process of a hybrid vehicle, which avoids power dips, improves power continuity, and does not require additional costs.

[0075] The control method will be described in detail below:

[0076] Reference Figure 1 , Figure 1 The flowchart illustrating the steps of a vehicle power control method according to Embodiment 1 of the present invention is shown, as follows: Figure 1 As shown, this method is applied to hybrid vehicles and includes:

[0077] Step S101: When the accelerator pedal opening is greater than a first preset value, determine the current power mode of the vehicle; wherein, different power modes are powered by different combinations of power sources.

[0078] Reference Figure 2 , Figure 2 A schematic diagram of the powertrain architecture of a hybrid vehicle is shown, such as... Figure 2 As shown in the embodiment of the present invention, the power structure of the hybrid vehicle mainly consists of the following components: multiple motors, an engine, a gearbox, and a clutch (not shown in the figure).

[0079] The engine and transmission are located on the front axle of the vehicle. Multiple motors are located on both the front and rear axles.

[0080] The hybrid vehicle also includes a gearbox and a clutch. The clutch is connected to the engine, and the motor located on the front axle is connected to the input shaft gear of the gearbox and the clutch, respectively.

[0081] The gearbox includes a synchronizer, which is used to ensure that the gears to be engaged reach the same speed and mesh smoothly.

[0082] In one specific implementation, the motor located on the front axle can be a P2.5 motor, and the motor located on the rear axle can be a P4 motor.

[0083] In this embodiment of the invention, when controlling the switching of vehicle power mode, the vehicle's operating condition is first detected, and the current power mode of the vehicle is determined when the accelerator pedal opening is greater than a first preset value.

[0084] A power mode refers to the mode in which the vehicle's power source provides power to maintain vehicle operation. Different power modes are powered by different combinations of power sources.

[0085] The power source combination can be one power source or multiple power sources, which is not limited here.

[0086] In one specific implementation, when the accelerator pedal opening is greater than a first preset value, it indicates that the vehicle is in a state of high-throttle acceleration. In this case, the current power mode of the vehicle can be either pure electric rear-wheel drive mode or pure electric four-wheel drive mode.

[0087] When determining the current power mode of the vehicle, the vehicle control system first generates an acquisition command and sends it to the controller. The controller obtains the current operating status of each major working component of the vehicle through the vehicle's CAN signal and sends the operating status to the control system.

[0088] The acquired operating conditions include: engine status, the status of the motor located on the front axle, the status of the motor located on the rear axle, clutch status, and synchronizer status.

[0089] The control system determines the current power mode of the vehicle based on the received current operating conditions of the vehicle, and then executes step S102.

[0090] Step S102: Based on the current power mode, perform at least one power source intervention operation to control the vehicle to gradually increase the output power.

[0091] The power source involved in the previous power source intervention operation is different from the power source involved in the next power source intervention operation; and the intervened power source is different from the power source corresponding to the current power mode.

[0092] The power source of a hybrid vehicle includes multiple electric motors and an engine, wherein the multiple electric motors include a motor located on the front axle and a motor located on the rear axle. When driven by electric power, one or more of the multiple electric motors output power; when driven by thermal power, the engine outputs power; and when driven by hybrid power, the engine and one or more of the multiple electric motors jointly output power.

[0093] Based on the vehicle's current power mode, the control system determines the number of times and the execution process for power source intervention. In this way, the system gradually increases the vehicle's output power.

[0094] Understandably, in the current power mode of a vehicle, there is a power source that is currently outputting power, which can be called the current power source.

[0095] The power source intervention operation involves a different power source than the current power source (current power source) corresponding to the current power mode. In other words, the power source intervention operation involves another power source being introduced while the current power source maintains its power output, and the power source introduced in the previous power source intervention operation is different from the power source introduced in the next power source intervention operation. After the power source intervention operation introduces a power source, the current power source remains in a driving state to provide assistance and / or power generation.

[0096] For example, in the vehicle's current power mode, power is output by power source A, so power source A is the current power source. The first power source intervention operation involves power source B, while power source A remains in a driving state. The second power source intervention operation involves power source C, while both power sources A and B remain in a driving state.

[0097] This allows the output power to gradually increase, avoiding the problem of power drop-off and improving power continuity; moreover, the power source intervention operation is simple and easy to implement, making the vehicle's power response faster during start-up and acceleration.

[0098] The following explains the process of gradually switching the vehicle's power mode:

[0099] Based on the vehicle's current power mode, the control system determines the number of times the power source intervention operation should be performed, as well as the execution process.

[0100] In one specific implementation, the vehicle's current power mode can be either pure electric rear-wheel drive or pure electric four-wheel drive.

[0101] When the vehicle is in pure electric rear-wheel drive mode, two power source intervention operations are performed. The first power source intervention operation controls the vehicle to switch from pure electric rear-wheel drive mode to pure electric four-wheel drive mode, and the second power source intervention operation controls the vehicle to switch from pure electric four-wheel drive mode to engine direct drive mode.

[0102] When the vehicle is in pure electric four-wheel drive mode, a power source intervention operation is performed to control the vehicle to switch from pure electric four-wheel drive mode to engine direct drive mode.

[0103] The following is a detailed explanation of the control method for switching the vehicle's power mode when the current power mode of the hybrid vehicle is pure electric rear-wheel drive:

[0104] Reference Figure 3 , Figure 3 This diagram illustrates a flowchart of the power source intervention steps in another embodiment of the present invention when the vehicle is currently in pure electric rear-wheel drive mode. Figure 3 As shown, it includes:

[0105] Step S301: Engage the motor located on the front axle and control the motor located on the front axle to output power so that the vehicle enters the pure electric four-wheel drive mode.

[0106] Step S302: Intervene the engine and control the engine to output power so that the vehicle enters the engine direct drive mode.

[0107] With the vehicle's main operating components currently in a state where the rear axle motor is driving, the front axle motor is off, the engine is off, the clutch is open, and the synchronizer is disengaged, the vehicle is confirmed to be in pure electric rear-wheel drive mode. To gradually switch the vehicle from pure electric rear-wheel drive mode to engine direct drive mode, two power source intervention operations are required.

[0108] Understandably, when the vehicle is currently in pure electric rear-wheel drive mode, the current power source provided by the vehicle is the motor located on the rear axle. When performing two power source intervention operations, different power sources are intervened in sequence while the motor located on the rear axle maintains drive.

[0109] First, while the motor located on the rear axle maintains power output, the motor located on the front axle is engaged and its power output is controlled, so that the vehicle can switch from pure electric rear-wheel drive mode to pure electric four-wheel drive mode.

[0110] In pure electric four-wheel drive mode, the main working components of the vehicle are in the following states: the motor located on the front axle and the motor located on the rear axle are driving, the engine is off, the clutch is open, and the synchronizer is engaged.

[0111] Next, while the motor located on the rear axle and the motor located on the front axle maintain drive, the engine is engaged and the engine output power is controlled so that the vehicle can switch from pure electric four-wheel drive mode to engine direct drive mode.

[0112] In engine direct drive mode, the main working components of the vehicle are in the following states: the engine is running, the motor located on the rear axle is driving, the motor located on the front axle is assisting or generating electricity, the clutch is in the closed state, and the synchronizer is in the gear position.

[0113] After the vehicle enters engine direct drive mode, it completes the starting acceleration process and enters normal driving mode.

[0114] In an optional embodiment, step S301 above includes the following sub-steps A1 to A2:

[0115] Sub-step A1: Control the synchronizer to engage gears and the motor located on the front axle to output power.

[0116] Sub-step A2: Disable engine start to allow the vehicle to enter the pure electric four-wheel drive mode.

[0117] Hybrid vehicles include a transmission and a clutch. The clutch is connected to the engine, and the electric motor located on the front axle is connected to the input shaft gear of the transmission and the clutch, respectively. The transmission includes a synchronizer.

[0118] When the vehicle is currently in pure electric rear-wheel drive mode, when the first power source intervention operation is performed on the vehicle, the control system first generates a control command and sends the control command to the controller to control the synchronizer to engage gears. After the synchronizer completes the engagement, it controls the motor located on the front axle to output power and prohibits the engine from starting, so that the vehicle can enter pure electric four-wheel drive mode from pure electric rear-wheel drive mode.

[0119] Because this power source intervention process requires controlling the synchronizer to engage gears and controlling the power output of the motor located on the front axle, it is necessary to prevent the engine from starting during the engagement of the motor on the front axle. This is to avoid the motor on the front axle accidentally starting the engine through the clutch after the synchronizer engages gears. If the engine starts accidentally at this time, the vehicle will directly switch from pure electric rear-wheel drive mode to engine direct drive mode, resulting in a sudden and discontinuous increase in power, and a poor driving experience.

[0120] In an optional embodiment, step S302 above includes the following sub-steps B1 to B3:

[0121] Sub-step B1: Control the clutch to slip and start the engine.

[0122] Sub-step B2: Determine the speed difference between the engine speed and the gearbox input shaft speed.

[0123] Sub-step B3: When the speed difference is less than a preset threshold, control the clutch to close and the engine to output power so that the vehicle enters the engine direct drive mode.

[0124] After the vehicle switches from pure electric rear-wheel drive mode to pure electric four-wheel drive mode, a second power source intervention operation is performed on the vehicle. First, the control system generates a control command and sends the control command to the controller to control the clutch slippage to start the engine.

[0125] Clutch slippage refers to the state where the clutch gradually closes. Because the engine speed is controlled at idle speed and the input shaft speed (clutch driven end) is relatively low, the clutch cannot lock completely and remains in a slightly slipping closed state. Starting the engine with clutch slippage allows the engine speed to gradually increase to a suitable value before locking completely.

[0126] This avoids the problem of inconsistent power delivery caused by large changes in engine speed.

[0127] After the engine starts, the engine speed and the transmission input shaft speed are continuously acquired, and the speed difference between the two is calculated. If the speed difference is less than a preset threshold, it can be determined that the engine has started smoothly. Then, the clutch is controlled to close, and the engine output power is controlled to switch the vehicle from pure electric four-wheel drive mode to engine direct drive mode.

[0128] In an alternative embodiment, after putting the vehicle into the pure electric four-wheel drive mode, the method further includes: releasing the prohibition control on engine starting.

[0129] Reference Figure 4 , Figure 4 A flowchart illustrating the steps of detecting power source intervention operating conditions according to another embodiment of the present invention is shown, as follows: Figure 4 As shown, it includes:

[0130] Step S401: Detect whether the vehicle meets the intervention operation conditions, wherein the intervention operation conditions include at least one of the following conditions: the high-voltage battery charge is greater than a second preset value, the high-voltage battery discharge power is greater than a third preset value, and the engine is in a stopped state.

[0131] Step S402: If satisfied, proceed to the step of performing at least one power source intervention operation based on the current power mode.

[0132] When the vehicle is currently in pure electric rear-wheel drive mode, before performing power source intervention, it is necessary to check the vehicle's operating condition to determine whether the vehicle currently meets the intervention conditions.

[0133] If the vehicle meets the conditions for intervention, a power source intervention operation is performed on the vehicle.

[0134] During vehicle condition testing, the control system first generates a testing command, and the controller then checks the vehicle's current operating parameters. These parameters include: high-voltage battery charge, high-voltage battery discharge power, and the current engine status.

[0135] When the accelerator pedal opening is greater than the first preset value, it indicates that the vehicle is currently in a high-throttle start-up state. In this state, when the high-voltage battery charge is greater than the second preset value and the high-voltage battery discharge power is greater than the third preset value, it indicates that the vehicle motor is driven. When the engine is in a stopped state, it indicates that the initial power for vehicle start-up will be output by the motor.

[0136] Under these starting conditions, it can be determined that the vehicle meets the conditions for intervention. In order to achieve a rapid start and continuous power, the power source intervention operation is performed to enable the vehicle to start and accelerate smoothly and quickly.

[0137] If the vehicle's current operating parameters do not meet the intervention conditions, the power source intervention operation will not be performed, and the vehicle's operating parameters will be continuously monitored until the intervention conditions are met.

[0138] The following is a detailed explanation of the control method for switching vehicle power modes when the current power mode of a hybrid vehicle is pure electric four-wheel drive mode:

[0139] In one alternative embodiment, when the current power mode is the pure electric four-wheel drive mode, the engine is engaged and the engine output power is controlled to enable the vehicle to enter the engine direct drive mode.

[0140] When determining the current power mode of the vehicle, the current operating conditions of the vehicle's main working components are first obtained, including: engine status, the status of the motor located on the front axle, the status of the motor located on the rear axle, clutch status, and synchronizer status.

[0141] With the motors located on the front axle and the rear axle driving, the engine off, the clutch open, and the synchronizer engaged, the vehicle is currently in pure electric four-wheel drive mode.

[0142] When a hybrid vehicle starts in pure electric four-wheel drive mode, only one power source intervention operation is required. While the motors located on the front axle and the motors located on the rear axle maintain drive, the engine is intervened and its output power is controlled to put the vehicle into engine direct drive mode.

[0143] In one optional embodiment, intervening in the engine and controlling the engine to output power to put the vehicle into the engine direct drive mode includes:

[0144] The engine is started by controlling clutch slippage;

[0145] Alternatively, control the motor located on the front axle to start the engine.

[0146] When a vehicle starts in pure electric four-wheel drive mode, in order to enable the vehicle to accelerate quickly into normal driving and maintain the continuity of power during this process, a power source intervention operation is required to control the engine output power and put the vehicle into engine direct drive mode.

[0147] In this situation, there are two ways to start the engine:

[0148] One method is to start the engine by controlling clutch slippage.

[0149] The control system generates control commands and sends them to the controller, which then controls the clutch to slip and start the engine, and controls the motor located on the front axle to switch from drive mode to assist mode or generator mode.

[0150] By using the motor located on the front axle to assist or generate electricity, the vehicle's power output gradually increases until the engine is fully driven, thus avoiding a power drop during engine start-up.

[0151] The process of starting the engine by clutch slippage is the same as in the above embodiments, and will not be described again here.

[0152] Another method is to control the motor located on the front axle to start the engine.

[0153] The control system generates control commands and sends them to the controller, which then controls the motor located on the front axle to unload the current torque and controls the synchronizer to disengage.

[0154] Then control the clutch to close.

[0155] Then the motor located on the front axle drives the engine to rotate until the engine reaches a certain speed and remains stable, thus completing the engine start-up.

[0156] In one specific implementation, the two methods of starting the engine described above are applied independently to the vehicle based on actual needs.

[0157] In this way, the vehicle's power mode can be switched quickly, achieving the goal of rapid vehicle start-up and acceleration; at the same time, the clutch is not involved in starting the engine, avoiding the problem of power drop-off and improving power continuity.

[0158] In engine direct drive mode, the main working components of the vehicle are in the following states: the engine is running, the motor located on the rear axle is driving, the motor located on the front axle is assisting or generating electricity, the clutch is in the closed state, and the synchronizer is in the gear position.

[0159] This invention, in an embodiment of the present invention, determines the current power mode of the vehicle when the accelerator pedal opening is greater than a first preset value; wherein different power modes are output by different combinations of power sources; based on the current power mode, at least one power source intervention operation is performed to control the vehicle to gradually increase the output power; wherein 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; wherein the intervened power source is different from the power source corresponding to the current power mode.

[0160] By performing at least one power source intervention operation based on the vehicle's current power mode, the power output gradually increases during the vehicle's start-up and acceleration process, eliminating the problem of power drop caused by sudden torque changes, thus greatly improving the continuity of power.

[0161] The following example illustrates the flow of the control method provided in this embodiment of the invention:

[0162] Reference Figure 5 , Figure 5 A flowchart illustrating another embodiment of the control method of the present invention is shown, as follows: Figure 5 As shown, it includes:

[0163] When the accelerator pedal opening is greater than a first preset value, it indicates that the vehicle is in a state of high-throttle acceleration. First, the operating conditions of the main working components of the vehicle are obtained, including: engine status, the status of the motor located on the front axle, the status of the motor located on the rear axle, clutch status, and synchronizer status.

[0164] The vehicle control system generates an acquisition command and sends it to the controller. The controller obtains the current operating status of each major working component of the vehicle through the vehicle's CAN signal and sends the operating status to the control system.

[0165] With the vehicle's main operating components currently in a state where the rear axle motor is driving, the front axle motor is off, the engine is off, the clutch is open, and the synchronizer is disengaged, the vehicle is confirmed to be in pure electric rear-wheel drive mode. To gradually switch the vehicle from pure electric rear-wheel drive mode to engine direct drive mode, two power source intervention operations are required.

[0166] First, check if the vehicle's current operating parameters meet the intervention conditions, including: high-voltage battery charge greater than the second preset value, high-voltage battery discharge power greater than the third preset value, and the engine being in a stopped state. If the vehicle meets the intervention conditions, execute the power source intervention operation; if not, continue checking until the conditions are met.

[0167] The initial power source intervention involves engaging the front axle motor while the rear axle motor maintains drive. This controls the output power of the front axle motor, engages the synchronizer, and disables engine starting, thus transitioning the vehicle from pure electric rear-wheel drive mode to pure electric four-wheel drive mode. Once the vehicle is in pure electric four-wheel drive mode, the engine disengagement is lifted.

[0168] The second power source intervention operation involves engaging the engine while the motors on the rear and front axles maintain drive. The engine is started by controlling clutch slippage. Once the difference between the engine speed and the transmission input shaft speed is less than a preset threshold, indicating a smooth engine start, the clutch is engaged to transition the vehicle from pure electric four-wheel drive mode to engine direct drive mode. At this point, the engine is running, the rear axle motor is driving, the front axle motor provides assistance or generates electricity, the clutch is engaged, and the synchronizer is in gear.

[0169] After the vehicle enters engine direct drive mode, it completes the starting acceleration process and enters normal driving mode.

[0170] With the vehicle's main operating components currently driven by the motors located on the front and rear axles, the engine off, the clutch disengaged, and the synchronizer engaged, the vehicle is confirmed to be in pure electric four-wheel drive mode. To switch the vehicle from pure electric four-wheel drive mode to engine direct drive mode, a power source intervention operation is required.

[0171] With the motors on the rear axle and front axle maintaining drive, the engine engages. The engine is started by controlling the clutch slippage via the motor on the front axle. If the difference between the engine speed and the transmission input shaft speed is less than a preset threshold, the engine is considered to have started smoothly. Then, the clutch is engaged, and the engine output power is controlled to transition the vehicle from pure electric four-wheel drive mode to engine direct drive mode. At this time, the engine is running, the rear axle motor is driving, the front axle motor provides assistance or generates electricity, the clutch is engaged, and the synchronizer is in gear.

[0172] After the vehicle enters engine direct drive mode, it completes the starting acceleration process and enters normal driving mode.

[0173] Example 2

[0174] Reference Figure 6 , Figure 6 A schematic diagram of the structure of a vehicle power control device according to Embodiment 2 of the present invention is shown, as follows: Figure 6 As shown, it includes:

[0175] The determining module 601 is used to determine the current power mode of the vehicle when the accelerator pedal opening is greater than a first preset value; wherein different power modes are output by different combinations of power sources.

[0176] The execution module 602 is configured to perform at least one power source intervention operation based on the current power mode, so as to control the vehicle to gradually increase the output power; wherein 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; wherein the intervened power source is different from the power source corresponding to the current power mode.

[0177] In an optional embodiment, the execution module 602 includes:

[0178] The first intervention module is used to intervene in the motor located on the front axle and control the motor located on the front axle to output power so that the vehicle enters the pure electric four-wheel drive mode.

[0179] The second intervention module is used to intervene in the engine and control the engine to output power so that the vehicle enters the engine direct drive mode.

[0180] In an optional embodiment, the first intervention module includes:

[0181] The first control module is used to control the synchronizer to engage gears and the motor located on the front axle to output power.

[0182] The first prohibition module is used to prevent the engine from starting so that the vehicle can enter the pure electric four-wheel drive mode.

[0183] In one optional embodiment, the second intervention module includes:

[0184] The second control module is used to control the clutch to slip and start the engine;

[0185] The first acquisition module is used to determine the speed difference between the engine speed and the gearbox input shaft speed;

[0186] The third control module is used to control the clutch engagement and the engine output power when the speed difference is less than a preset threshold, so as to enable the vehicle to enter the engine direct drive mode.

[0187] In an optional embodiment, the first blocking module includes:

[0188] The release module is used to release the prohibition control on starting the engine.

[0189] In an optional embodiment, the execution module 602 further includes:

[0190] The third intervention module is used to intervene in the engine and control the engine to output power when the current power mode is the pure electric four-wheel drive mode, so that the vehicle enters the engine direct drive mode.

[0191] In one optional embodiment, the third intervention module includes:

[0192] The fourth control module is used to control the clutch slippage to start the engine;

[0193] Alternatively, control the motor located on the front axle to start the engine.

[0194] In an optional embodiment, the determining module 601 includes:

[0195] The detection module is used to detect whether the vehicle meets the intervention operation conditions, wherein the intervention operation conditions include at least one of the following conditions: the high-voltage battery charge is greater than a second preset value, the high-voltage battery discharge power is greater than a third preset value, and the engine is in a stopped state; if the conditions are met, the system enters the power source intervention operation step based on the current power mode.

[0196] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, comprising:

[0197] A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the control method described in any of the above embodiments.

[0198] Based on the same inventive concept, embodiments of the present invention also provide a vehicle, including: a vehicle power control device, the vehicle power control device being used to execute the vehicle power control method described in any of the above embodiments.

[0199] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0200] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps can be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and components involved are not necessarily essential to the present invention.

[0201] The present invention has provided a detailed description of a vehicle power control method, device, electronic device, and vehicle. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for controlling the power of a vehicle, characterized in that, The method is applied to hybrid vehicles, wherein the power source of the hybrid vehicle includes: multiple motors and an engine, wherein the multiple motors include a motor located on the front axle and a motor located on the rear axle; the method includes: When the accelerator pedal opening is greater than a first preset value, the current power mode of the vehicle is determined; wherein, different power modes are output by different combinations of power sources; Based on the current power mode, at least two power source intervention operations are performed to control the vehicle to gradually increase the output power, so that the power output of the vehicle gradually increases during the start-up acceleration process; wherein, 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. Wherein, the power source that intervenes is different from the power source corresponding to the current power mode; The power source intervention operation involves one type of power source at a time; after the power source intervention operation intervenes in the power source, the power source corresponding to the current power mode remains in driving state. The power modes include pure electric rear-wheel drive mode, pure electric four-wheel drive mode, and engine direct drive mode; the step of performing at least two power source intervention operations based on the current power mode includes: When the current power mode is the pure electric rear-wheel drive mode, the following power source intervention operations are performed sequentially: The motor located on the front axle is engaged, and the motor located on the front axle is controlled to output power so that the vehicle enters the pure electric four-wheel drive mode; Intervene the engine and control its output power to put the vehicle into engine direct drive mode.

2. The method according to claim 1, characterized in that, The vehicle includes a gearbox and a clutch, the clutch being connected to the engine, and the motor located on the front axle being connected to the input shaft gear of the gearbox and the clutch, wherein the gearbox includes a synchronizer; The step of intervening in the motor located on the front axle and controlling the output power of the motor located on the front axle to enable the vehicle to enter the pure electric four-wheel drive mode includes: Control the synchronizer to engage gears and the motor located on the front axle to output power; The engine is prevented from starting so that the vehicle enters the pure electric four-wheel drive mode.

3. The method according to claim 1, characterized in that, The vehicle includes a gearbox and a clutch, the clutch being connected to the engine, and the motor located on the front axle being connected to the input shaft gear of the gearbox and the clutch, wherein the gearbox includes a synchronizer; The intervention of the engine and control of the engine output power to put the vehicle into the engine direct drive mode includes: Control the clutch to slip and start the engine; Determine the speed difference between the engine speed and the gearbox input shaft speed; When the speed difference is less than a preset threshold, the clutch is controlled to close and the engine outputs power so that the vehicle enters the engine direct drive mode.

4. The method according to claim 2, characterized in that, After putting the vehicle into the pure electric four-wheel drive mode, the method further includes: releasing the prohibition control on engine starting.

5. The method according to claim 1, characterized in that, The power modes include pure electric rear-wheel drive mode, pure electric four-wheel drive mode, and engine direct drive mode; based on the current power mode, at least two power source intervention operations are performed, including: When the current power mode is the pure electric four-wheel drive mode, the engine is engaged and the engine output power is controlled to enable the vehicle to enter the engine direct drive mode.

6. The method according to claim 5, characterized in that, The intervention of the engine and control of the engine output power to put the vehicle into the engine direct drive mode includes: The engine is started by controlling clutch slippage; Alternatively, control the motor located on the front axle to start the engine.

7. The method according to claim 1, characterized in that, The power modes include pure electric rear-wheel drive mode, pure electric four-wheel drive mode, and engine direct drive mode; when the current power mode is the pure electric rear-wheel drive mode, before performing at least two power source intervention operations, the method includes: The system detects whether the vehicle meets the intervention operation conditions, wherein the intervention operation conditions include at least one of the following conditions: the high-voltage battery charge is greater than a second preset value, the high-voltage battery discharge power is greater than a third preset value, and the engine is in a stopped state. If the conditions are met, then proceed to the step of performing at least one power source intervention operation based on the current power mode.

8. A power control device for a vehicle, characterized in that, The device is applied to a hybrid vehicle and performs the power control method for the vehicle according to any one of claims 1 to 7, wherein the power source of the hybrid vehicle includes: a plurality of motors and an engine, wherein the plurality of motors include a motor located on the front axle and a motor located on the rear axle; the device includes: The determination module is used to determine the current power mode of the vehicle when the accelerator pedal opening is greater than a first preset value; wherein different power modes are output by different combinations of power sources. The execution module is used to perform at least two power source intervention operations based on the current power mode, so as to control the vehicle to gradually increase the output power, so that the power output of the vehicle gradually increases during the start-up acceleration process; Wherein, 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; wherein, the intervened power source is different from the power source corresponding to the current power mode; wherein, the power source intervention operation intervenes in one power source at a time; after the power source intervention operation intervenes in the power source, the power source corresponding to the current power mode remains in driving state; The execution module includes: The first intervention module is used to intervene in the motor located on the front axle and control the motor located on the front axle to output power so that the vehicle enters the pure electric four-wheel drive mode. The second intervention module is used to intervene in the engine and control the engine to output power so that the vehicle enters the engine direct drive mode.

9. An electronic device, characterized in that, include: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the control method according to any one of claims 1 to 7.

10. A vehicle, characterized in that, The vehicle includes a power control device for performing the power control method of the vehicle according to any one of claims 1 to 7.

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