Hybrid transmission control method, device and computer storage medium

Abstract

This invention belongs to the field of automotive technology and proposes a hybrid transmission control method, device, and computer storage medium. The method includes: determining whether the vehicle meets preset conditions; if the preset conditions are met, controlling the transmission and engine to execute corresponding speeds and torques respectively; the motors of the engine and transmission rotate in the same direction of force; the transmission and engine are connected by a spline structure, so that the force direction at the connection between the transmission and engine is the same, thereby preventing knocking noise problems that occur when the engine drives the transmission in hybrid mode, thus improving the driving experience.

Description

Technical Field

[0001] This invention belongs to the field of transmission control technology, and specifically relates to a hybrid transmission control method, device, and computer storage medium. Background Technology

[0002] Currently, with the rapid development of new energy vehicles, there are many hybrid models. However, the hybrid engine and hybrid transmission generator are rigidly connected. During the start-up process of the hybrid engine, there is a problem of repeated knocking noises between the transmission and the generator, resulting in a poor driving experience for customers. Summary of the Invention

[0003] To address the above problems, this invention proposes a hybrid transmission control method, the method comprising:

[0004] Determine whether the vehicle meets the preset conditions;

[0005] If the preset conditions are met, the gearbox and engine are controlled to execute corresponding speeds and torques respectively, wherein the motors of the engine and the gearbox rotate in the same direction of force, and the gearbox and the engine are connected by a spline structure.

[0006] Optionally, determine whether the vehicle meets preset conditions, including:

[0007] All of the following conditions must be met:

[0008] The monitored vehicle is in standby mode, and the gear position sensor is in P gear;

[0009] The driver's seatbelt and door closing signals are valid;

[0010] The power mode is hybrid;

[0011] The power mode is set to forced power preservation, and the forced power preservation charge state setting is higher than the current actual vehicle charge state value.

[0012] Optionally, before determining whether the vehicle meets the preset conditions, the method further includes:

[0013] Send vehicle control information to the transmission and engine;

[0014] The gearbox and the engine execute corresponding instructions based on the received information and feed back the execution results to determine whether the execution was successful.

[0015] Optionally, if the preset conditions are met, controlling the transmission and engine to execute corresponding speeds and torques respectively includes:

[0016] The motor torque controlling the gearbox is a preset first torque, and its speed is a first speed, wherein the first torque is a negative torque;

[0017] The motor torque of the engine is a preset second torque, and its speed is a second speed. The second torque is greater than the first torque, and the first speed is greater than the second speed.

[0018] Optionally, the first torque is -8 to -12 Nm, the first speed is 2850 to 3150 r / min, the second torque is 18 to 22 Nm, and the second speed is 1350 to 1650 r / min.

[0019] Optionally, the method further includes:

[0020] If the preset conditions are not met, the vehicle is readjusted and the information collected is used to re-evaluate whether the preset conditions are met. This process is repeated until the preset conditions are met.

[0021] The present invention also provides a hybrid transmission control device, comprising:

[0022] The conditions module is used to determine whether a vehicle meets preset conditions;

[0023] The control module is used to control the gearbox and the engine to execute corresponding speeds and torques respectively if the preset conditions are met, wherein the motors of the engine and the gearbox rotate in the same direction of force, and the gearbox and the engine are connected by a spline structure.

[0024] Optional, including:

[0025] The condition module is also used to readjust the vehicle and re-evaluate whether the collected information meets the preset conditions if the preset conditions are not met, repeating this process until the preset conditions are met.

[0026] Optional, including:

[0027] The control module includes a vehicle controller, a transmission controller, and an engine controller. The vehicle controller is used to monitor the vehicle's driving status and release vehicle control information. The transmission controller is used to monitor the transmission's operating status in real time and control the torque and speed of the generator and drive motor. The engine controller is used to monitor the operating status of the new energy vehicle engine and control the engine's output torque and speed.

[0028] The present invention also provides a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for controlling a hybrid transmission.

[0029] The hybrid transmission control method of the present invention determines whether the vehicle meets preset conditions. If the preset conditions are met, the transmission and engine are controlled to execute corresponding speeds and torques respectively. The motors of the engine and transmission rotate in the same direction of force. The transmission and engine are connected by a spline structure, so that the force direction at the connection between the transmission and the engine is the same. Therefore, when switching to hybrid mode, the engine drives the transmission to rotate without the knocking noise problem that occurs when the transmission is working, thus improving the driving experience.

[0030] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A flowchart illustrating the hybrid transmission control method in an embodiment of the present invention is shown;

[0033] Figure 2 A schematic diagram of the hybrid transmission control device in an embodiment of the present invention is shown. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 embodiments of the present invention, not all embodiments. 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.

[0035] like Figure 1 As shown, the present invention provides a hybrid transmission control method, the method comprising:

[0036] Step S10: Determine whether the vehicle meets the preset conditions. It should be noted that the determination of whether the vehicle meets the preset conditions is based on the various states of the vehicle collected by the new energy vehicle controller (HCU). If the preset conditions cannot be met at all, the subsequent strategies will not be executed.

[0037] In one embodiment, determining whether a vehicle meets preset conditions includes: meeting all of the following conditions:

[0038] The monitored vehicle is in standby mode, and the gear position sensor is in P gear;

[0039] The driver's seatbelt and door closing signals are valid;

[0040] The power mode is hybrid;

[0041] The battery mode is set to forced charge retention, and the forced charge retention state of charge (SOC) setting is higher than the current actual vehicle state of charge value. Only when all of the above conditions are met can it be determined that the preset conditions are met. If any one condition is missing, it is considered that the preset conditions are not met, and subsequent operations will not be performed.

[0042] In one embodiment, before determining whether the vehicle meets preset conditions, the method further includes:

[0043] Send vehicle control information to the transmission and engine;

[0044] The transmission and engine execute corresponding commands based on the received information and provide feedback on the results to determine if the execution was successful. It's important to note that the vehicle control unit (HCU) can acquire various vehicle operating states and operator status information, and send this information to the transmission and engine. The transmission and engine then begin operating and executing relevant commands, such as controlling motor speed or torque, or even controlling the motor's on / off state. Feedback is then provided to the execution mechanism to determine if the execution was successful, preventing any impact on subsequent operations.

[0045] Step S20: If preset conditions are met, control the transmission and engine to execute corresponding speeds and torques respectively. The motors of the engine and transmission rotate in the same direction of force, and the transmission and engine are connected via a spline structure. Specifically, the rotation of the engine and transmission motors in the same direction of force ensures that the force direction at the connection between the transmission and engine is the same. This prevents knocking noise from the transmission when the engine drives the transmission motor in hybrid mode, improving the driving experience. Specifically, the engine and transmission are connected via a dual-mass flywheel spline structure. If the conditions are not met, knocking noise will occur between the engine and transmission motors due to torque fluctuations. Once the conditions are met, the engine drives the transmission motor to rotate in the same direction of force. Furthermore, once the conditions are met, the engine speed is given a speed fluctuation range by the engine controller, and then the transmission motor speed and direction are calculated based on the engine speed and direction (using a power balance formula). In addition, before switching to hybrid mode, the transmission speed and torque, as well as the motor speed and torque of the engine, are all zero in pure electric operation. In hybrid mode, if the preset conditions are not met, there will be a situation where the direction of the force on the transmission and the motor of the engine is inconsistent. When the preset conditions are met, the transmission and the engine execute the corresponding speed and torque, so that the engine is the driving force and the transmission motor shaft is the driven force, with the rotation direction being the same as the engine direction. The engine drives the motor to do work and generate electricity.

[0046] In one embodiment, if preset conditions are met, the transmission and engine are controlled to execute corresponding speeds and torques, respectively, including:

[0047] The motor torque controlling the gearbox is a preset first torque, and its speed is the first torque, wherein the first torque is a negative torque;

[0048] The engine's electric motor torque is a preset second torque, and its speed is a second speed. The second torque is greater than the first torque, and the first speed is greater than the second speed. It should be noted that to ensure the engine plays a dominant role, the engine's electric motor torque is greater than that of the motor controlling the transmission. Furthermore, different vehicle models have corresponding calibration data for the first torque and second speed of the transmission's electric motor, as well as corresponding calibration data for the engine's electric motor's second torque and second speed. The target data is obtained from these data, and the target data is the corresponding calibration data. At this time, the engine drives the transmission to rotate, achieving operation in hybrid mode.

[0049] In one embodiment, the first torque is -8 to -12 Nm, optionally -10 Nm; the first speed is 2850 to 3150 r / min, optionally 3000 r / min; the second torque is 18 to 22 Nm, optionally 20 Nm; and the second speed is 1350 to 1650 r / min, optionally 1500 r / min. Specifically, the new energy transmission controller (MCU) responds to the vehicle controller (HCU) commands to control the transmission to perform corresponding speed and torque control actions. According to the actual vehicle calibration data, the optimal torque control of the generator by the transmission controller (MCU) is -10Nm, and the optimal speed is 3000r / min. For other models, adjustments can be made appropriately based on the calibration data. At the same time, the new energy engine controller (EMS) responds to the transmission controller (MCU) commands to control the engine to perform corresponding speed and torque control actions. According to the actual vehicle calibration data, the optimal torque control of the engine by the new energy engine controller (EMS) is 20Nm. To ensure that the engine plays a dominant role, the engine torque is greater than the generator torque, and the optimal speed is 1500r / min. For other models, adjustments can be made appropriately based on the calibration data.

[0050] In one embodiment, the method further includes:

[0051] If the preset conditions are not met, the vehicle is readjusted, and the information collected is used to reassess whether the preset conditions are met. This process is repeated until the preset conditions are met. It should be noted that if the preset conditions are not met, this control method will not be implemented until they are met.

[0052] In summary, the specific working process of the hybrid transmission control method of the present invention is as follows:

[0053] The vehicle controller (HCU) monitors the vehicle to ensure it is in a ready state. The driver's seatbelt and door signals are detected as valid, indicating the driver is in a safe state. The vehicle is shifted to P (Park) gear, and the power mode on the vehicle's large screen is set to hybrid. The battery mode is set to forced charge maintenance, and the defined value of the forced charge maintenance state is higher than the current actual vehicle state of charge. If the vehicle meets these defined conditions, the control strategy is implemented. At this time, the transmission controller (MCU) responds to the HCU's command, controlling the generator torque to -10 Nm and the speed to approximately 3000 r / min in torque control mode. Simultaneously, the engine controller (EMS) controls the engine to start synchronously, rapidly increasing the engine torque to 20 Nm and the speed to approximately 1500 r / min. After successful engine start, the engine speed stabilizes at around 1300 r / min. The transmission controller (MCU) switches to speed control mode, generating electricity according to the engine speed to replenish the vehicle's battery. This quickly completes the power switch between the hybrid engine and the hybrid transmission generator, avoiding the problem of repeated knocking noises from the hybrid transmission generator.

[0054] The advantages of this invention are: without changing the existing rigid connection structure between the hybrid engine and the hybrid transmission generator in new energy vehicles, by adjusting the control strategies of the vehicle controller (HCU), transmission controller (MCU), and engine controller (EMS), the power switching between the hybrid engine and the hybrid transmission generator can be completed quickly when the defined conditions are met, thus avoiding the problem of repeated knocking noises from the hybrid transmission generator.

[0055] like Figure 2 As shown, the present invention also provides a hybrid transmission control device, comprising:

[0056] The conditions module is used to determine whether a vehicle meets preset conditions;

[0057] The control module controls the transmission and engine to achieve corresponding speeds and torques if preset conditions are met. The motors in both the engine and transmission rotate in the same direction, and the transmission and engine are connected via a spline structure. These two modules ensure that the force direction at the connection between the transmission and engine is the same, thus preventing the knocking noise that occurs when the engine drives the transmission in hybrid mode, improving the driving experience.

[0058] In one embodiment, the device includes:

[0059] The condition module is also used to readjust the vehicle and re-evaluate whether the collected information meets the preset conditions if the preset conditions are not met. This process is repeated until the preset conditions are met. Specifically, the condition module includes the following conditions:

[0060] The monitored vehicle is in standby mode, and the gear position sensor is in P gear;

[0061] The driver's seatbelt and door closing signals are valid;

[0062] The power mode is hybrid;

[0063] The power mode is set to forced power preservation, and the forced power preservation charge state setting is higher than the current actual vehicle charge state value. The control module can only operate if all conditions in the condition module are met; otherwise, the operation will not be performed.

[0064] In one embodiment, the apparatus further includes:

[0065] The control module includes a vehicle controller, a transmission controller, and an engine controller. The vehicle controller monitors the vehicle's driving status and disseminates vehicle control information. The transmission controller monitors the transmission's operating status in real time and controls the torque and speed of the generator and drive motor. The engine controller monitors the operating status of the new energy vehicle's engine and controls its output torque and speed. Additionally, the control module includes a dual-motor hybrid transmission (DHT), a device specifically designed for new energy vehicles that integrates dual motors, a reducer, and a motor controller. The dual motors consist of a generator and a drive motor. A gear position sensor detects and interprets the driver's intentions and provides feedback on the vehicle's current gear position. The system also includes a large touchscreen control system unique to new energy vehicles, used for vehicle energy management interface control and power mode selection.

[0066] In summary, this invention solves the problem of repeated knocking noises from the hybrid transmission generator during the start-up process of the hybrid engine in current new energy vehicles due to the rigid connection between the hybrid engine and the hybrid transmission generator, thereby improving customer driving comfort and satisfaction.

[0067] This invention also provides a readable storage medium storing a computer program that, when executed by a processor, implements a hybrid transmission control method. By using a readable storage medium to execute the method of this invention, the engine-driven transmission rotation in hybrid mode is prevented from producing knocking noises during transmission operation, thus improving the driving experience.

[0068] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid transmission control method, characterized in that, The method includes: Determine whether the vehicle meets the preset conditions. All of the following conditions must be met: The monitored vehicle is in standby mode, and the gear position sensor is in P gear; The driver's seatbelt and door closing signals are valid; The power mode is hybrid electric; The power mode is set to forced power preservation, and the forced power preservation charge state setting is higher than the current actual vehicle charge state value. If the preset conditions are met, the gearbox and engine are controlled to execute corresponding speeds and torques respectively, and the motor torque of the gearbox is controlled to be a preset first torque, and its speed is a first speed, wherein the first torque is a negative torque; The motor torque of the engine is a preset second torque, and its rotation speed is a second rotation speed. The second torque is greater than the first torque, and the first rotation speed is greater than the second rotation speed. The motors of the engine and the gearbox rotate in the same direction of force, and the gearbox and the engine are connected by a spline structure.

2. The hybrid transmission control method according to claim 1, characterized in that, Before determining whether the vehicle meets the preset conditions, the method further includes: Send vehicle control information to the transmission and engine; The gearbox and the engine execute corresponding instructions based on the received information and feed back the execution results to determine whether the execution was successful.

3. The hybrid transmission control method according to claim 1, characterized in that, The first torque is -8 to -12 Nm, the first speed is 2850 to 3150 r / min, the second torque is 18 to 22 Nm, and the second speed is 1350 to 1650 r / min.

4. The hybrid transmission control method according to claim 1, characterized in that, The method further includes: If the preset conditions are not met, the vehicle is readjusted and the information collected is used to re-evaluate whether the preset conditions are met. This process is repeated until the preset conditions are met.

5. A hybrid transmission control device, characterized in that, include: The conditions module is used to determine whether a vehicle meets preset conditions. It must meet all of the following conditions: The monitored vehicle is in standby mode, and the gear position sensor is in P gear; The driver's seatbelt and door closing signals are valid; The power mode is hybrid electric; The power mode is set to forced power preservation, and the forced power preservation charge state setting is higher than the current actual vehicle charge state value. The control module is used to control the gearbox and the engine to execute corresponding speeds and torques respectively if the preset conditions are met. The motor torque of the gearbox is controlled to be a preset first torque, and its speed is a first speed, wherein the first torque is a negative torque. The motor torque of the engine is controlled to be a preset second torque, and its speed is a second speed. The second torque is greater than the first torque, and the first speed is greater than the second speed. The motors of the engine and the gearbox rotate in the same direction of force, and the gearbox and the engine are connected by a spline structure.

6. The hybrid transmission control device according to claim 5, characterized in that, include: The condition module is also used to readjust the vehicle and re-evaluate whether the collected information meets the preset conditions if the preset conditions are not met, repeating this process until the preset conditions are met.

7. The hybrid transmission control device according to claim 5, characterized in that, include: The control module includes a vehicle controller, a transmission controller, and an engine controller. The vehicle controller is used to monitor the vehicle's driving status and release vehicle control information. The transmission controller is used to monitor the transmission's operating status in real time and control the torque and speed of the generator and drive motor. The engine controller is used to monitor the operating status of the new energy vehicle engine and control the engine's output torque and speed.

8. A readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1-4.

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