Direct connection type P1 hybrid commercial vehicle gear shifting coordination control method and device and vehicle

Abstract

The invention provides a direct connection type P1 hybrid commercial vehicle gear shifting coordination control method and device and a vehicle. The method comprises the steps that a vehicle gear shifting request is received, assembly torque reduction is achieved through an engine and a motor, and a gearbox is made to reverse to a neutral gear; the rotating speed of the power assembly is adjusted through an engine and a motor according to the vehicle operation condition and the gear shifting time, so that the rotating speeds of the clutch before and after gear shifting are synchronous; and an assembly torque returning request is received, and the output torque of the engine and the output torque of the motor are dynamically distributed according to the accelerator response characteristic curve. The torque response speed can be increased, rotating speed overshoot and clutch contact impact are avoided, the torque returning speed is increased, and the dynamic property and comfort of a vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid power system control, and in particular to a direct-connected P1 hybrid commercial vehicle gear shift coordination control method, device and vehicle. Background Art

[0002] The direct-connected P1 hybrid system adds a motor power system to the traditional fuel vehicle. The motor is directly connected to the flywheel housing of the engine. Therefore, the motor speed is always consistent with the engine speed during operation. When the motor provides positive torque, it assists the engine to drive the vehicle; when the engine or vehicle coasts and drives the motor to rotate, that is, the motor provides negative torque, the motor generates electricity and stores it in the battery.

[0003] In the hybrid shift control of heavy trucks that use the P1 hybrid system transmission system, when shifting gears, the engine needs to reduce torque first and then return torque. Because the dynamic response characteristics of diesel engine torque and speed regulation are far inferior to those of electric motors, the shifting time is long and the vehicle's power is poor; the vehicle is subject to greater impact during the shifting process.

[0004] In addition, the intervention of the motor in the hybrid system is not predicted according to the vehicle condition. Since the motor power of the P1 hybrid vehicle is not large, it is easy to encounter a situation where downshifting is still required to increase torque even though the motor intervenes, resulting in frequent and short-term intervention of the motor, which seriously affects the life of the motor and battery. Summary of the invention

[0005] The present invention provides a direct-connected P1 hybrid commercial vehicle gear shift coordination control method, device and vehicle, which are used to solve the defects of the prior art such as long gear shift time, large vehicle impact and frequent short-time intervention of the motor during the gear shift process, which affects the life of the motor and battery, and improve the vehicle's power and motor life.

[0006] The present invention provides a direct-connected P1 hybrid commercial vehicle shift coordination control method, which is used in a vehicle controller and includes the following steps: Upon receiving a gear shift request from the vehicle, the engine and the motor are used to reduce the torque of the assembly, so that the transmission is shifted back to neutral; According to the vehicle operating conditions and shifting time, the powertrain speed is adjusted through the engine and the motor so that the clutch speed is synchronized before and after the shifting; Upon receiving the assembly torque return request, the output torque of the engine and motor is dynamically distributed according to the throttle response characteristic curve.

[0007] According to the direct-connected P1 hybrid commercial vehicle shift coordination control method provided by the present invention, before receiving a vehicle shift request, the method further includes: According to the vehicle operating conditions, determine whether the torque provided by the engine and the motor at the current gear can meet the vehicle operating requirements; When the torque provided by the engine and the motor simultaneously still cannot meet the vehicle's operating requirements, a gear shift request is issued.

[0008] According to the direct-connected P1 hybrid commercial vehicle shift coordination control method provided by the present invention, the shift time is obtained by the following steps: Determine the target shift point based on the vehicle's current driving mode; Based on the target shift point, a shift time is determined.

[0009] According to the direct-connected P1 hybrid commercial vehicle shift coordination control method provided by the present invention, the steps of achieving assembly torque reduction through the engine and the motor specifically include: Upon receiving a request for assembly torque reduction, the engine is controlled to stop fuel injection, and the motor is controlled to provide negative torque to achieve assembly torque reduction.

[0010] According to the direct-connected P1 hybrid commercial vehicle shift coordination control method provided by the present invention, the step of adjusting the powertrain speed through the engine and the motor specifically includes: After the assembly torque reduction is completed, the vehicle enters the speed regulation process; During the vehicle speed regulation process, a first target speed and a second target speed are calculated according to the vehicle operating conditions, wherein the first target speed is a clutch speed that can be achieved by the motor within the shift time, and the second target speed is a clutch speed corresponding to the target shift point; adjusting the powertrain to reach the first target speed by the motor; The powertrain is further regulated by the engine to reach the second target speed.

[0011] According to the direct-connected P1 hybrid commercial vehicle shift coordination control method provided by the present invention, the step of dynamically allocating the output torque of the engine and the motor according to the throttle response characteristic curve specifically includes: In the initial stage of torque return, the motor outputs maximum torque; In the later stage of torque reduction, the economic range of stable engine operation is obtained based on the engine external characteristic curve; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is greater than the maximum torque provided by the engine economic range, the motor provides positive torque; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is less than the minimum torque provided by the engine economic range, the motor provides negative torque; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is within the torque range provided by the engine economic range, the motor is in a silent state.

[0012] The direct-connected P1 hybrid commercial vehicle shift coordination control method provided by the present invention also includes: storing the shift parameters in the vehicle controller during the shift process, wherein the shift parameters include a target shift point, a shift time, a first target speed, a second target speed, and a throttle response characteristic curve; According to different vehicles, the gear shift parameters stored in the vehicle controller are configured; Upon receiving a gear shift request, the configured gear shift parameters are directly called.

[0013] The present invention also provides a direct-connected P1 hybrid commercial vehicle shift coordination control device, comprising the following modules: The torque reduction module is used to receive a gear shift request from the vehicle, realize assembly torque reduction through the engine and the motor, and shift the gearbox down to neutral; The speed control module is used to adjust the powertrain speed through the engine and the motor according to the vehicle operating conditions and the shifting time, so that the clutch speed is synchronized before and after the shifting; The torque return module is used to receive the assembly torque return request and dynamically distribute the output torque of the engine and the motor according to the throttle response characteristic curve.

[0014] The present invention also provides a direct-connected P1 hybrid commercial vehicle, including a vehicle controller; The vehicle controller is used to execute any of the above-described direct-connected P1 hybrid commercial vehicle gear shift coordination control methods.

[0015] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the shift coordination control method for a direct-connected P1 hybrid commercial vehicle as described above is implemented.

[0016] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the shift coordination control method for a direct-connected P1 hybrid commercial vehicle as described in any one of the above is implemented.

[0017] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned direct-connected P1 hybrid commercial vehicle gear shift coordination control methods.

[0018] The direct-connected P1 hybrid commercial vehicle shift coordination control method, device and vehicle provided by the present invention, when receiving a vehicle shift request, realizes assembly torque reduction through the engine and motor, so that the gearbox is shifted to neutral; according to the vehicle operating conditions and shift time, the power assembly speed is adjusted through the engine and motor to synchronize the clutch speed before and after the shift; when receiving an assembly torque return request, the output torque of the engine and motor is dynamically allocated according to the throttle response characteristic curve. The present invention can avoid frequent motor intervention, realize energy recovery, realize the synchronization of the front and rear speeds of the clutch during the speed regulation process, and avoid impact; dynamically allocate torque during torque return to improve power. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a flow chart of the gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle provided by the present invention.

[0021] Figure 2 It is a schematic diagram of the structure for dynamically distributing the output torque of the motor and the engine provided by the present invention.

[0022] Figure 3 It is a schematic structural diagram of the direct-connected P1 hybrid system provided by the present invention.

[0023] Figure 4 It is a structural schematic diagram of a direct-connected P1 hybrid commercial vehicle shift coordination control device provided by the present invention.

[0024] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention is described in detail below in conjunction with the accompanying drawings of the specification. The specific operating method in the method embodiment can also be applied to the device embodiment or the system embodiment. In the description of the present invention, unless otherwise specified, "at least one" includes one or more. "Multiple" refers to two or more. For example, at least one of A, B and C includes: A exists alone, B exists alone, A and B exist at the same time, A and C exist at the same time, B and C exist at the same time, and A, B and C exist at the same time. In the present invention, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a kind of association relationship that describes the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0027] The present invention will be described in detail below in conjunction with specific implementation modes.

[0028] In some specific embodiments of the present invention, Figure 1 As shown, this solution provides a direct-connected P1 hybrid commercial vehicle shift coordination control method for a vehicle controller, the method comprising: Step 100: receiving a vehicle shift request, reducing the torque of the assembly through the engine and the motor, and shifting the gearbox down to neutral; Step 200: According to the vehicle operating conditions and the shifting time, the powertrain speed is adjusted by the engine and the motor so that the speed of the clutch is synchronized before and after the shifting; Step 300: After receiving the assembly torque return request, dynamically distribute the output torque of the engine and the motor according to the throttle response characteristic curve.

[0029] It should be noted that the existing hybrid commercial vehicle shifting scheme cannot implement motor intervention in stages, which affects the life of the motor and battery. In addition, there are problems such as long shifting time, poor power, and large vehicle impact in the shifting control.

[0030] Therefore, the present invention improves the torque response speed, avoids speed overshoot and clutch contact impact, increases the torque return speed, enhances vehicle power and comfort, and improves vehicle performance and economy by improving the gear shift coordination control method.

[0031] Normally, when a shift request is received, shifting, torque reduction, speed regulation and torque return are key operations in the vehicle transmission controller control, which together ensure the smooth driving and power performance of the vehicle. Among them, shifting refers to the process of the transmission changing the gear ratio according to the driving conditions to adapt to different vehicle speeds and load conditions. The shift can be upshifting (increasing the gear to increase the vehicle speed) or downshifting (reducing the gear to increase the torque). Torque reduction refers to the need to reduce the torque output of the engine in order to reduce the load on the transmission and clutch during the shifting process; torque reduction is usually performed before the shifting process to ensure the smoothness of the shifting process and reduce mechanical shock. Speed ​​regulation refers to the process of adjusting the speed of the engine or motor during the shifting process so that the speed of the input shaft and the output shaft match when the clutch is engaged to achieve smooth shifting; speed regulation can reduce the impact and noise during the shifting and improve driving comfort. Torque return refers to the restoration or increase of the torque output of the engine after the shifting is completed to maintain the power output and acceleration performance of the vehicle; torque return needs to match the gear and driving conditions after the shifting to ensure that the vehicle can continue to drive or accelerate smoothly.

[0032] That is to say, torque reduction is usually performed before shifting to reduce the mechanical impact and load during shifting; gear shifting requires speed regulation to ensure the smoothness of gear shifting; after the gear shift is completed, torque needs to be returned to restore the power output of the vehicle. In the hybrid vehicle provided in the embodiment of the present invention, these operations are more complicated and involve coordination between the internal combustion engine and the motor. The motor can provide a fast torque response to help achieve fast torque reduction and torque return, thereby improving the shifting speed and the dynamic response of the vehicle. At the same time, the motor can also provide negative torque in the torque reduction stage to help the vehicle slow down and recover energy, thereby improving fuel economy.

[0033] In detail, first, in order to prepare for the gear shift, the vehicle's control system will request a torque reduction, which usually involves reducing the output torque of the engine and the torque of the motor; the purpose of the torque reduction is to reduce the load on the transmission during the gear shift, making the gear shift process smoother and reducing mechanical shock and wear. Next, the speed is adjusted, that is, the speed of the engine or motor is adjusted to match the new gear. In an automatic transmission (including AMT), it usually involves adjusting the engine speed so that the speed of the input shaft and the output shaft of the transmission can be synchronized when the clutch is engaged. This ensures smoothness during the gear shift and reduces or eliminates the gear shift shock. Once the speed adjustment is completed, the shift execution signal will be sent, and the transmission will execute the shift operation to switch the gear to the target gear. After the gear shift is completed, the clutch will reclose, connecting the input shaft and output shaft of the transmission, and the vehicle will continue to drive. Finally, according to the driving needs of the vehicle, the control system will gradually restore or increase the torque output of the engine and / or motor to maintain the vehicle's power output and acceleration performance. Automatic mechanical transmission AMT is an automatic transmission that combines the simplicity and economy of a manual transmission with the convenience of an automatic transmission.

[0034] In general, torque reduction usually occurs before speed regulation to prepare for the gear shift process. Speed ​​regulation occurs after the clutch is disengaged to ensure smoothness and synchronization during gear shifting. Precise coordination of these two steps is essential to achieve smooth and efficient gear shifting.

[0035] In some possible implementations of the present invention, before receiving a vehicle gear shift request, the method further includes: According to the vehicle operating conditions, determine whether the torque provided by the engine and the motor at the current gear can meet the vehicle operating requirements; When the torque provided by the engine and the motor simultaneously still cannot meet the vehicle's operating requirements, a gear shift request is issued.

[0036] Specifically, this embodiment provides an implementation method for a vehicle shift request, and determines whether the motor provides assistance based on the vehicle operating conditions. If the motor assistance can meet the current operating requirements of the vehicle, the vehicle operating requirements are met through motor intervention.

[0037] If the motor assist still cannot meet the current operating requirements of the vehicle, gear shifting is required.

[0038] In a possible embodiment, the operating conditions include but are not limited to vehicle speed, throttle opening, current gear, vehicle load, vehicle acceleration, road slope, and battery power. If the torque provided by the motor in the current gear still cannot meet the needs of the entire vehicle, the motor will no longer intervene and downshift.

[0039] Normally, since the direct-connected P1 hybrid commercial vehicle motor has low power, even if the motor outputs full power, it cannot maintain the vehicle speed or engine speed, i.e. the shift point. No longer involved here means no more power assistance, which happens after the gearbox sends a downshift signal, and the motor is still involved in the downshift process; if the motor still assists here, the shift will be delayed, so the motor is not used for power assistance, and downshifts are increased in advance to increase torque.

[0040] The above arrangement of the present invention can avoid frequent and short-term intervention of the motor, which affects the life of the motor and the battery. In some possible implementations of the present invention, the shift time is obtained by the following steps: Determine the target shift point based on the vehicle's current driving mode; Based on the target shift point, a shift time is determined.

[0041] Specifically, this embodiment provides an implementation method for obtaining the gear shifting time, by obtaining the current driving mode, determining the gear shifting point according to different driving modes, and determining the gear shifting time according to the gear shifting point.

[0042] In a possible embodiment, the transmission control unit TCU (Transmission Control Unit) selects a shift point to adapt to different driving modes by judging the driving mode, such as whether the current driving mode is an economic mode or a power mode.

[0043] It can be understood that this setting of the present invention fully takes into account multiple driving modes. The target shift points of the vehicle are different in different driving modes, and the shift times corresponding to the target shift points are also different. Therefore, it is necessary to select the target shift points according to the user's driving mode to improve the efficiency and accuracy of the shifting and enhance the user's driving experience.

[0044] In some possible implementations of the present invention, the step of achieving assembly torque reduction by the engine and the motor specifically includes: Upon receiving a request for assembly torque reduction, the engine is controlled to stop fuel injection, and the motor is controlled to provide negative torque to achieve assembly torque reduction.

[0045] Specifically, this embodiment provides an implementation method for achieving torque reduction of the assembly, where negative torque is provided by the motor to increase the torque response speed.

[0046] In a possible embodiment, after the automatic mechanical transmission (AMT) requests a torque reduction, the motor provides negative torque, which effectively shortens the torque reduction time and enables energy recovery, thereby contributing to the economy of the vehicle.

[0047] In some possible implementations of the present invention, the step of adjusting the speed of the powertrain by the engine and the motor specifically includes: After the assembly torque reduction is completed, the vehicle enters the speed regulation process; During the vehicle speed regulation process, a first target speed and a second target speed are calculated according to the vehicle operating conditions, wherein the first target speed is a clutch speed that can be achieved by the motor within the shift time, and the second target speed is a clutch speed corresponding to the target shift point; adjusting the powertrain to reach the first target speed by the motor; The powertrain is further regulated by the engine to reach the second target speed.

[0048] Specifically, this embodiment provides an implementation method for adjusting the speed of the powertrain. During the speed adjustment, the speed synchronization before and after the clutch is achieved by calculating the shift execution time and the vehicle speed, thereby avoiding speed overshoot and clutch contact shock.

[0049] Specifically, during the speed regulation process, according to the vehicle operating conditions and shifting time, the motor speed regulation time and the gearbox input shaft speed regulation time are fitted to achieve simultaneous synchronization of the front and rear speeds of the clutch, thereby effectively shortening the speed regulation time and avoiding the impact caused by speed asynchrony when the clutch is engaged.

[0050] In a possible embodiment, the speed sensor can sense the current speed and speed change gradient of the transmission input shaft, and simultaneously obtain the engine speed and the speed change gradient after the motor applies negative torque. That is to say, the speed and speed change gradient of the transmission input shaft can be sensed by the sensor, and the execution time of the shifting mechanism can also be known, so the speed at the time of engagement can be inferred.

[0051] This embodiment ensures the power of the whole vehicle by setting the first target speed and the second target speed, while making the impact of the gear shifting process as small as possible and the gear shifting smooth.

[0052] In some possible implementations of the present invention, the step of dynamically allocating the output torque of the engine and the motor according to the throttle response characteristic curve specifically includes: In the initial stage of torque return, the motor outputs maximum torque; In the later stage of torque reduction, the economic range of stable engine operation is obtained based on the engine external characteristic curve; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is greater than the maximum torque provided by the engine economic range, the motor provides positive torque; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is less than the minimum torque provided by the engine economic range, the motor provides negative torque; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is within the torque range provided by the engine economic range, the motor is in a silent state.

[0053] Specifically, this embodiment provides an implementation method for dynamically distributing the output torque of the engine and the motor. When returning torque, the torque distribution between the motor and the engine is dynamically realized according to the torque demand corresponding to the throttle response characteristic curve to achieve rapid torque return.

[0054] It is understood that the throttle characteristic curve (throttle map) is a parameter correspondence curve used in vehicle control, which defines the relationship between the throttle pedal position and the engine or motor output. Specifically, the throttle map is a data structure that maps the driver's operation of the throttle pedal (such as the opening of the throttle pedal) to the vehicle's power output (such as the engine's torque or the motor's power).

[0055] Specifically, the main functions of the throttle map include: Power response adjustment: By adjusting the throttle map, you can change the vehicle's response characteristics to throttle input, such as making the vehicle more sensitive at low speeds or more stable at high speeds.

[0056] Driving mode differentiation: Different driving modes (such as economic mode and sports mode) can be achieved through different throttle maps to adapt to different driving needs and styles.

[0057] Performance Optimization: The throttle map can be optimized based on the specific performance parameters of the vehicle to achieve the best acceleration performance and fuel efficiency.

[0058] Safety Control: In some cases, the throttle map can be used to limit power output to ensure the safety of the vehicle under certain conditions.

[0059] Adapt to different working conditions: The throttle map can be dynamically adjusted according to the vehicle's current working conditions (such as speed, load, road conditions, etc.) to achieve the best driving experience.

[0060] In hybrid vehicles, the throttle map affects not only the engine output, but also the motor output, as well as the coordination between the two. By finely controlling the throttle map, the vehicle control system can more effectively manage the power distribution between the internal combustion engine and the motor, thereby improving the performance and efficiency of the entire vehicle.

[0061] Specifically, Figure 2 As shown, after the vehicle shifts gears successfully, a torque return operation is required. During the torque return operation, the torque is dynamically distributed according to the throttle response characteristic curve to increase the torque return speed and enhance the vehicle's dynamics.

[0062] Specifically, the torque return operation includes two stages, namely the initial stage and the later stage. The initial stage refers to when the assembly torque return request is received, due to the delay in the engine torque output, the motor provides a large torque in advance, which can provide sufficient torque faster to increase the torque return speed; the later stage refers to when the engine torque increases, the motor torque intervention is gradually reduced to improve the vehicle power. In some possible implementations of the present invention, the direct-connected P1 hybrid commercial vehicle shift coordination control method also includes: storing the shift parameters in the vehicle controller during the shift process, wherein the shift parameters include a target shift point, a shift time, a first target speed, a second target speed, and a throttle response characteristic curve; According to different vehicles, the gear shift parameters stored in the vehicle controller are configured; Upon receiving a gear shift request, the configured gear shift parameters are directly called.

[0063] Specifically, this embodiment provides an implementation method for directly calling the shift parameters to perform the shift operation, storing the shift parameters required in the shift process in the vehicle controller, and calling them according to different vehicles to adapt to different vehicles.

[0064] In a possible embodiment, the shift parameters include a target shift point, a shift time, a first target speed, a second target speed, a torque threshold, and a throttle response characteristic curve.

[0065] In some possible embodiments, the shift parameters also include data and control logic related to vehicle operation.

[0066] In a possible embodiment, the parameters in the vehicle controller (such as shift points, torque thresholds, etc.) can be configured according to the specific characteristics of different vehicles, and can be adapted to vehicles of different models or configurations through software updates or parameter adjustments. This design of the present embodiment can make the vehicle controller have certain flexibility and configurability to meet the needs of different vehicles.

[0067] In a possible embodiment, the vehicle controller may adopt a modular design, allowing different control strategies and parameter sets to be loaded according to the needs of different vehicles. This design of the present embodiment allows the same type of controller to be used for a variety of vehicle models, and only needs to be adjusted according to the specific parameters of the vehicle.

[0068] In possible embodiments, the vehicle controller may support changing its behavior and performance through software updates, can be programmed to adapt to different vehicles, or be optimized according to new performance requirements during the life cycle of the vehicle.

[0069] In a possible embodiment, the vehicle controller may be developed based on a common platform that can be customized according to the specific needs of different vehicles. This platform approach can reduce development costs while providing enough flexibility to adapt to different vehicles.

[0070] In a possible embodiment, the vehicle controller may follow certain industry standards or interface specifications so that it can communicate with sensors and actuators of different vehicles, thereby achieving control over different vehicles.

[0071] In some possible implementations of the present invention, the coordinated control of the motor and the engine can be described from the entire process of shifting, such as Figure 3 As shown, Figure 3It is a structural schematic diagram of the direct-connected P1 hybrid system provided by the present invention, the transmission controller sends a shift request and a target shift point according to the current driving condition of the vehicle; the transmission controller requests the powertrain to reduce torque, the engine controller controls the engine to stop injecting fuel, and the motor controller controls the motor to provide negative torque so that the powertrain torque quickly reaches the torque threshold; the clutch is disengaged, and the AMT executes a downshift to neutral; after the downshift is completed, the first target speed and the second target speed are calculated according to the current vehicle operating condition, and the powertrain speed begins to be adjusted. When the motor adjusts the powertrain speed to reach the first target speed threshold, the shift mechanism execution time and the speed adjustment time are matched by calculation, and the speed is continued to be adjusted so that the front and rear of the clutch reach the second target speed at the same time, and a shift execution signal is sent; the transmission executes a shift to the target gear, and the clutch is closed; after the shift is completed, the output torque of the engine and the motor is dynamically allocated according to the throttle response characteristic curve.

[0072] The direct-connected P1 hybrid commercial vehicle gear shift coordination control method provided by the present invention determines whether the motor is assisting according to the vehicle working condition, so as to avoid frequent and short-term intervention of the motor, which affects the life of the motor and the battery; selects the gear shift point by judging the driving mode to adapt to different driving modes; utilizes the fast dynamic response of the motor to provide negative torque when reducing torque, thereby improving the torque response speed; achieves speed synchronization before and after the clutch by calculating the gear shift execution time and vehicle speed during speed regulation, thereby avoiding speed overshoot and clutch contact impact; dynamically distributes torque according to the throttle map during torque return, improves the torque return speed, and improves the vehicle's power; gear shift parameters such as the gear shift point, torque threshold, speed threshold, and throttle map are stored in the vehicle controller and are called according to different vehicles to adapt to different vehicles; through the above-mentioned settings of the present invention, the gear shift speed and comfort are improved, and it helps to improve the power and economy of the entire vehicle.

[0073] In some specific embodiments of the present invention, Figure 4 As shown, this solution provides a direct-connected P1 hybrid commercial vehicle shift coordination control device, including: The torque reduction module 41 is used to receive a vehicle shift request, realize assembly torque reduction through the engine and the motor, and shift the gearbox down to neutral; The speed control module 42 is used to adjust the speed of the powertrain through the engine and the motor according to the vehicle operating conditions and the gear shifting time, so that the speed of the clutch is synchronized before and after the gear shifting; The torque return module 43 is used to receive the assembly torque return request and dynamically distribute the output torque of the engine and the motor according to the throttle response characteristic curve.

[0074] The implementation principle and beneficial effects of the direct-connected P1 hybrid commercial vehicle gear shift coordination control device provided in the embodiment of the present invention are similar to the implementation principle and beneficial effects of the direct-connected P1 hybrid commercial vehicle gear shift coordination control method shown in the above embodiment. Please refer to the implementation principle and beneficial effects of the direct-connected P1 hybrid commercial vehicle gear shift coordination control method shown in the above embodiment, and no further details will be given here.

[0075] In some specific implementation schemes of the present invention, the present scheme provides a direct-connected P1 hybrid commercial vehicle, including a vehicle controller; the vehicle controller is used to execute the direct-connected P1 hybrid commercial vehicle gear shift coordination control method provided in any of the above embodiments.

[0076] Figure 5 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530 and a communication bus 540, wherein the processor 510, the communication interface 520 and the memory 530 communicate with each other through the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute the gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle, the method comprising: upon receiving a vehicle gear shift request, achieving assembly torque reduction through the engine and the motor, so that the gearbox is shifted back to neutral; according to the vehicle operating conditions and the gear shift time, adjusting the powertrain speed through the engine and the motor, so that the speed of the clutch is synchronized before and after the gear shift; upon receiving an assembly torque return request, dynamically allocating the output torque of the engine and the motor according to the throttle response characteristic curve.

[0077] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0078] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the direct-connected P1 hybrid commercial vehicle gear shift coordination control method provided by the above methods, the method including: receiving a vehicle gear shift request, achieving assembly torque reduction through the engine and the motor, so that the transmission is shifted to neutral; according to the vehicle operating conditions and the gear shift time, adjusting the powertrain speed through the engine and the motor to synchronize the clutch speed before and after the gear shift; receiving an assembly torque return request, and dynamically allocating the output torque of the engine and the motor according to the throttle response characteristic curve.

[0079] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the direct-connected P1 hybrid commercial vehicle gear shift coordination control method provided by the above-mentioned methods, the method comprising: receiving a vehicle gear shift request, achieving assembly torque reduction through the engine and the motor, so that the transmission is shifted to neutral; according to the vehicle operating conditions and the gear shift time, adjusting the powertrain speed through the engine and the motor so that the clutch speed is synchronized before and after the gear shift; receiving an assembly torque return request, dynamically allocating the output torque of the engine and the motor according to the throttle response characteristic curve.

[0080] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0081] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle, characterized in that: For a vehicle controller, the method comprises: Upon receiving a gear shift request from the vehicle, the engine and the motor are used to reduce the torque of the assembly, so that the transmission is shifted back to neutral; According to the vehicle operating conditions and shifting time, the powertrain speed is adjusted through the engine and the motor so that the clutch speed is synchronized before and after the shifting; Upon receiving the assembly torque return request, the output torque of the engine and motor is dynamically distributed according to the throttle response characteristic curve.

2. The gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle according to claim 1, characterized in that: Before receiving the vehicle shift request, it also includes: According to the vehicle operating conditions, determine whether the torque provided by the engine and the motor at the current gear can meet the vehicle operating requirements; When the torque provided by the engine and the motor simultaneously still cannot meet the vehicle's operating requirements, a gear shift request is issued.

3. The gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle according to claim 1, characterized in that: The shift time is obtained by following the steps below: Determine the target shift point based on the vehicle's current driving mode; Based on the target shift point, a shift time is determined.

4. The gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle according to claim 3, characterized in that: The steps of achieving assembly torque reduction through the engine and the motor specifically include: Upon receiving a request for assembly torque reduction, the engine is controlled to stop fuel injection, and the motor is controlled to provide negative torque to achieve assembly torque reduction.

5. The gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle according to claim 4, characterized in that: The steps of regulating the speed of the powertrain by the engine and the motor include: After the assembly torque reduction is completed, the vehicle enters the speed regulation process; During the vehicle speed regulation process, a first target speed and a second target speed are calculated according to the vehicle operating conditions, wherein the first target speed is a clutch speed that can be achieved by the motor within the shift time, and the second target speed is a clutch speed corresponding to the target shift point; adjusting the powertrain to reach the first target speed by the motor; The powertrain is further regulated by the engine to reach the second target speed.

6. The gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle according to claim 5, characterized in that: The steps of dynamically distributing the output torque of the engine and the motor according to the throttle response characteristic curve specifically include: In the initial stage of torque return, the motor outputs maximum torque; In the later stage of torque reduction, the economic range of stable engine operation is obtained based on the engine external characteristic curve; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is greater than the maximum torque provided by the engine economic range, the motor provides positive torque; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is less than the minimum torque provided by the engine economic range, the motor provides negative torque; When the required torque corresponding to each throttle response value in the throttle response characteristic curve is within the torque range provided by the engine economic range, the motor is in a silent state.

7. The gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle according to any one of claims 1 to 6, characterized in that: Also includes: storing the shift parameters in the vehicle controller during the shift process, wherein the shift parameters include a target shift point, a shift time, a first target speed, a second target speed, and a throttle response characteristic curve; According to different vehicles, the gear shift parameters stored in the vehicle controller are configured; Upon receiving a gear shift request, the configured gear shift parameters are directly called.

8. A direct-connected P1 hybrid commercial vehicle shift coordination control device, characterized in that: include: The torque reduction module is used to receive a gear shift request from the vehicle, realize assembly torque reduction through the engine and the motor, and shift the gearbox down to neutral; The speed control module is used to adjust the powertrain speed through the engine and the motor according to the vehicle operating conditions and the shifting time, so that the clutch speed is synchronized before and after the shifting; The torque return module is used to receive the assembly torque return request and dynamically distribute the output torque of the engine and the motor according to the throttle response characteristic curve.

9. A direct-connected P1 hybrid commercial vehicle, characterized in that: including a vehicle controller; The vehicle controller is used to execute the direct-connected P1 hybrid commercial vehicle shift coordination control method as described in any one of claims 1-7.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the gear shift coordination control method for a direct-connected P1 hybrid commercial vehicle as described in any one of claims 1 to 7 is implemented.

Images