Starting control method, device, system, vehicle and storage medium of hybrid vehicle

Abstract

The application provides a starting control method, device and system of a hybrid vehicle, a vehicle and a storage medium, and belongs to the technical field of vehicle control. In the case where it is detected that the vehicle starts, the vehicle can be controlled to enter an idle electric four-wheel drive mode. In the case where it is determined that the vehicle enters a starting state, vehicle working condition data is acquired. Then, based on the vehicle working condition data, it is determined whether the vehicle meets mode switching conditions. Finally, in the case where it is determined that the vehicle meets the mode switching conditions, the clutch is controlled to be closed, so that the vehicle is switched from the idle electric four-wheel drive mode to the direct drive mode. In the case where the vehicle needs to be switched from the idle electric four-wheel drive mode to the direct drive mode, the vehicle can be quickly switched to the direct drive mode by controlling the clutch to be closed, so that the engine can quickly output torque, the vehicle can achieve better acceleration performance and faster power response in the starting stage, and the driving experience of the driver is effectively improved.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and in particular to a method, apparatus, system, vehicle, and storage medium for starting control of a hybrid vehicle. Background Technology

[0002] With the advancement of technology and the development of automotive electronics, hybrid vehicles are typically equipped with multiple driving modes, including direct drive mode and pure electric four-wheel drive mode, to adapt to different road conditions and driving needs.

[0003] In related technologies, when hybrid vehicles start at low speeds with heavy throttle, they need to switch from pure electric four-wheel drive mode to direct drive mode. However, during the mode switching process, the engine needs to be started, and it takes a certain amount of time for the engine to start and be able to output power, resulting in untimely start-up power response and a poor driver experience. Summary of the Invention

[0004] This application provides a starting control method, device, system, vehicle, and storage medium for hybrid vehicles to solve the problem in related technologies where the engine requires a certain amount of time to start and output power, resulting in untimely starting power response.

[0005] To solve the above problems, this application adopts the following technical solution:

[0006] In a first aspect, embodiments of this application provide a start-up control method for a hybrid vehicle, the method comprising:

[0007] When the vehicle is detected to be starting, the vehicle is controlled to enter the idle electric four-wheel drive mode; in the idle electric four-wheel drive mode, the front drive motor and the rear drive motor of the vehicle are in driving state, the engine is in idling state, and the clutch is in disengaged state.

[0008] Once it is determined that the vehicle has entered the starting state, vehicle operating data is acquired; the vehicle operating data includes the current throttle opening, current vehicle speed, and current battery charge.

[0009] Based on the vehicle operating data, determine whether the vehicle meets the mode switching conditions;

[0010] If the vehicle meets the mode switching conditions, the clutch is controlled to close, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor, the rear drive motor and the engine are all in a driving state.

[0011] In one embodiment of this application, after controlling the vehicle to enter idle electric four-wheel drive mode upon detecting vehicle startup, the method further includes:

[0012] Obtain the current gear and current throttle opening of the vehicle;

[0013] When the current gear is a forward gear and the current throttle opening is greater than a first opening threshold, the vehicle is determined to enter the starting state.

[0014] In one embodiment of this application, the step of determining whether the vehicle meets the mode switching conditions based on the vehicle operating condition data includes:

[0015] Based on the current throttle opening, determine whether the driver has a strong power demand;

[0016] If it is determined that the driver has a strong power demand, based on the current vehicle speed and the current battery charge, it is determined whether the vehicle meets the mode switching conditions.

[0017] In one embodiment of this application, the step of determining whether the driver has a strong power demand based on the current throttle opening includes:

[0018] If the current throttle opening is greater than the second opening threshold and the current throttle opening change rate is greater than the change rate threshold, it is determined that the driver has a strong power demand.

[0019] In one embodiment of this application, the step of determining whether the vehicle meets the mode switching conditions based on the current vehicle speed and the current battery charge includes:

[0020] If the current vehicle speed is less than a speed threshold and the current battery charge is greater than a charge threshold, it is determined that the vehicle meets the mode switching conditions.

[0021] In one embodiment of this application, the step of controlling the clutch to engage so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode when it is determined that the vehicle meets the mode switching conditions includes:

[0022] If the vehicle meets the mode switching conditions, the engine speed is controlled to increase so that the engine speed meets the clutch engagement conditions.

[0023] When the engine speed meets the clutch engagement condition, the clutch is controlled to engage, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode.

[0024] In one embodiment of this application, the step of controlling the engine speed to increase so that the engine speed meets the clutch engagement condition when it is determined that the vehicle meets the mode switching condition includes:

[0025] If the vehicle meets the mode switching conditions, an engine activation request is sent to the transmission controller.

[0026] Obtain the engine speed control request and target speed curve returned by the transmission controller in response to the engine activation request;

[0027] In response to the engine speed control request, a speed following request containing the target speed curve is sent to the engine controller; the speed following request is used to instruct the engine controller to control the engine to follow the target speed curve;

[0028] Upon receiving the clutch slippage status information sent by the transmission controller, it is determined that the engine speed meets the clutch engagement condition; wherein, the clutch slippage status information is generated by the transmission controller when it detects that the speed difference between the two ends of the clutch is less than the speed difference threshold and the clutch has completed oil pre-charging.

[0029] In one embodiment of this application, the step of controlling the clutch to engage when the engine speed meets the clutch engagement condition, so as to switch the vehicle from the idle electric four-wheel drive mode to the direct drive mode, includes:

[0030] When the engine speed meets the clutch engagement condition, a torque increase request is sent to the transmission controller, so that the transmission controller increases the clutch torque in response to the torque increase request until the clutch is fully engaged;

[0031] With the clutch fully engaged, it is determined that the vehicle has switched from the idle electric four-wheel drive mode to the direct drive mode.

[0032] Secondly, based on the same inventive concept, embodiments of this application provide a starting control device for a hybrid vehicle, the device comprising:

[0033] The first control module is used to control the vehicle to enter the idle electric four-wheel drive mode when the vehicle is detected to start; in the idle electric four-wheel drive mode, the front drive motor and the rear drive motor of the vehicle are in the driving state, the engine is in the idle state, and the clutch is in the disengaged state.

[0034] The first acquisition module is used to acquire vehicle operating condition data when it is determined that the vehicle has entered the starting state; the vehicle operating condition data includes the current throttle opening, the current vehicle speed, and the current battery charge.

[0035] The first determining module is used to determine whether the vehicle meets the mode switching conditions based on the vehicle operating condition data.

[0036] The second control module is used to control the clutch to close when it is determined that the vehicle meets the mode switching conditions, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor, the rear drive motor and the engine are all in a driving state.

[0037] In one embodiment of this application, the starting control device for the hybrid vehicle further includes:

[0038] The second acquisition module is used to acquire the current gear and current throttle opening of the vehicle;

[0039] The second determining module is used to determine that the vehicle has entered the starting state when the current gear is a forward gear and the current throttle opening is greater than a first opening threshold.

[0040] In one embodiment of this application, the first determining module includes:

[0041] The power demand determination submodule is used to determine whether the driver has a strong power demand based on the current throttle opening.

[0042] The switching condition determination submodule is used to determine whether the vehicle meets the mode switching conditions based on the current vehicle speed and the current battery charge when it is determined that the driver has a strong power demand.

[0043] In one embodiment of this application, the power demand determination submodule is specifically used to determine that the driver has a strong power demand when the current throttle opening is greater than a second opening threshold and the current throttle opening change rate is greater than a change rate threshold.

[0044] In one embodiment of this application, the switching condition determination submodule is specifically used to determine that the vehicle meets the mode switching condition when the current vehicle speed is less than a speed threshold and the current battery charge is greater than a charge threshold.

[0045] In one embodiment of this application, the second control module includes:

[0046] The speed control submodule is used to control the engine speed to increase when it is determined that the vehicle meets the mode switching conditions, so that the engine speed meets the clutch engagement conditions.

[0047] The torque control submodule is used to control the clutch to close when the engine speed meets the clutch closure condition, so as to switch the vehicle from the idle electric four-wheel drive mode to the direct drive mode.

[0048] In one embodiment of this application, the speed control submodule includes:

[0049] An activation request sending unit is used to send an engine activation request to the transmission controller when it is determined that the vehicle meets the mode switching conditions.

[0050] The target speed acquisition unit is used to acquire the engine speed control request and the target speed curve returned by the transmission controller in response to the engine activation request;

[0051] A speed following request sending unit is configured to send a speed following request containing the target speed curve to the engine controller in response to the engine speed control request; the speed following request is used to instruct the engine controller to control the engine to follow the target speed curve;

[0052] The closure condition determination unit is used to determine that the engine speed meets the clutch closure condition when the clutch slippage state information sent by the transmission controller is obtained; wherein, the clutch slippage state information is generated by the transmission controller when it detects that the speed difference between the two ends of the clutch is less than the speed difference threshold and the clutch has completed oil pre-charging.

[0053] In one embodiment of this application, the torque control submodule includes:

[0054] A torque request sending unit is configured to send an increased torque request to the transmission controller when the engine speed meets the clutch engagement condition, so that the transmission controller increases the clutch torque in response to the increased torque request until the clutch is fully engaged;

[0055] The mode switching determination unit is used to determine that the vehicle has switched from the idle electric four-wheel drive mode to the direct drive mode when the clutch is fully engaged.

[0056] Thirdly, based on the same inventive concept, embodiments of this application provide a start-up control system for a hybrid vehicle, the system comprising a vehicle controller, a transmission controller, and an engine controller; wherein,

[0057] The vehicle controller is used to send a first control request to the engine controller and a second control request to the transmission controller when the vehicle is detected to start, so as to control the vehicle to enter the idle electric four-wheel drive mode.

[0058] The engine controller is used to respond to the first control request by controlling the engine to start and idle.

[0059] The transmission controller is used to respond to the second control request by controlling the front drive motor and the rear drive motor of the vehicle to be in a driving state and the clutch to be in a disengaged state.

[0060] The vehicle controller is also used to acquire vehicle operating condition data when it is determined that the vehicle has entered the starting state, and to determine whether the vehicle meets the mode switching conditions based on the vehicle operating condition data; and to send a mode switching request to the transmission controller when it is determined that the vehicle meets the mode switching conditions.

[0061] The transmission controller is also configured to control the clutch to engage in response to the mode switching request, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor, the rear drive motor and the engine are all in a driving state.

[0062] Fourthly, based on the same inventive concept, embodiments of this application provide a vehicle including the start-up control system for a hybrid vehicle proposed in the third aspect of this application.

[0063] Fifthly, based on the same inventive concept, embodiments of this application provide a storage medium storing machine-executable instructions, which, when executed by a processor, implement the hybrid vehicle start-up control method proposed in the first aspect of this application.

[0064] Compared with the prior art, this application has the following advantages:

[0065] This application provides a hybrid vehicle start-up control method. Upon detecting vehicle startup, the method controls the vehicle to enter an idle electric four-wheel drive mode. Once the vehicle is confirmed to be in a start-up state, vehicle operating data is acquired. Based on this data, it is determined whether the vehicle meets the mode switching conditions. Finally, if the conditions are met, the clutch is engaged to switch the vehicle from the idle electric four-wheel drive mode to a direct-drive mode. This application, by developing an idle electric four-wheel drive mode, allows the engine to idle after vehicle startup. When the vehicle needs to switch from idle electric four-wheel drive mode to direct-drive mode, the clutch is engaged, enabling the vehicle to quickly switch to direct-drive mode. This allows the engine to rapidly output torque, enabling the front-drive motor, rear-drive motor, and engine to simultaneously drive the vehicle during the start-up phase, achieving better acceleration performance and faster power response, effectively improving the driver's experience. Attached Figure Description

[0066] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0067] Figure 1 This is a schematic diagram of the structure of a hybrid vehicle in one embodiment of this application.

[0068] Figure 2 This is a flowchart of the steps of a hybrid vehicle start-up control method according to an embodiment of this application.

[0069] Figure 3 This is a schematic diagram of the functional modules of a starting control device for a hybrid vehicle according to one embodiment of this application.

[0070] Figure 4 This is a schematic diagram of the starting control system of a hybrid vehicle according to one embodiment of this application.

[0071] Figure 5 This is a structural schematic diagram of a vehicle according to one embodiment of this application. Detailed Implementation

[0072] 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, and 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.

[0073] Reference Figure 1 The diagram shows a schematic of the structure of a hybrid vehicle according to an embodiment of this application. The hybrid vehicle includes a front-drive motor 101, a rear-drive motor 102, an engine 103, a clutch 104, a synchronizer 105, and a differential 106. The front-drive motor 101 is connected to one end of an input shaft, and the other end of the input shaft is connected to the engine 103 via the clutch 104. The input shaft is connected to an output shaft via a gear set, and a transmission gear that meshes with the differential 106 is connected to the output shaft. The synchronizer 105 is connected to the gear set and is used to synchronize the gear speeds between different gears. The rear-drive motor 102 is located on the rear axle and is used to provide power to the rear wheels through the rear drive shaft to drive the vehicle.

[0074] Hybrid vehicles using the above architecture are equipped with a front-drive motor 101, a rear-drive motor 102, and an engine 103. Therefore, to adapt to different road conditions and driving needs, they are typically equipped with multiple driving modes, including direct drive mode and pure electric four-wheel drive mode. In pure electric four-wheel drive mode, the engine 103 is turned off, the clutch 104 is disengaged, the synchronizer 105 is engaged, and the vehicle is driven by the front-drive motor 101 and the rear-drive motor 102. In direct drive mode, the clutch 104 is engaged, the synchronizer 105 is engaged, and the vehicle is driven by the engine 103, the front-drive motor 101, and the rear-drive motor 102.

[0075] In related technologies, when a hybrid vehicle starts at low speed with high throttle, it needs to switch from pure electric mode to direct drive mode. However, in the traditional mode switching strategy, the engine 103 is in a shut-off state at this time. Therefore, the engine 103 needs to be started. It takes a certain amount of time for the engine 103 to start and be able to output power, resulting in untimely start-up power response and a poor driver experience.

[0076] To address the shortcomings of the aforementioned background technology, this application aims to provide a starting control method for hybrid vehicles. By developing an idle electric four-wheel drive mode based on the pure electric four-wheel drive mode, the engine 103 can quickly output torque during the starting phase when the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode, thereby shortening the power response time of the engine 103 and improving the acceleration performance of the vehicle.

[0077] Reference Figure 2 This application illustrates a start-up control method for a hybrid vehicle, applicable to hybrid vehicles employing the aforementioned architecture. The method may include the following steps:

[0078] S201: When the vehicle is detected to be starting, control the vehicle to enter the idle electric four-wheel drive mode.

[0079] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, or an electronic device with the above functions, such as a vehicle computer, an on-board computer, such as an ECU (Electronic Control Unit), a BCM (Body Control Module), or a VCU (Vehicle Control Unit). This embodiment will use a VCU as the executing entity for explanation. It should also be noted that this embodiment does not impose specific limitations on the executing entity of the vehicle.

[0080] It should be noted that in the idle electric four-wheel drive mode, synchronizer 105 is engaged, the front drive motor 101 and rear drive motor 102 are in driving mode, the engine 103 is in idling mode, and clutch 104 is disengaged. In this mode, the front drive motor 101 and rear drive motor 102 drive the vehicle forward, and the engine 103 is running but not outputting torque.

[0081] In this embodiment, the vehicle can be put into a pre-configured idle electric four-wheel drive mode in several ways. For example, after starting the vehicle, the driver can transmit an operation command to the VCU to enter the idle electric four-wheel drive mode by directly issuing a voice command, triggering a pre-configured physical button, or triggering a virtual button on the display screen. The VCU then responds to the operation command and controls the vehicle to enter the idle electric four-wheel drive mode. Alternatively, the driver can set the idle electric four-wheel drive mode as the default mode after starting the vehicle according to their driving needs. In this case, the VCU will automatically control the vehicle to enter the idle electric four-wheel drive mode when it detects that the vehicle has started, to meet the driver's power needs during the initial start-up phase.

[0082] In this embodiment, since the engine 103 is controlled to be in an idling state when the vehicle is started, the engine 103 can quickly respond and output torque when the vehicle switches from the idling electric four-wheel drive mode to the direct drive mode during the start-up phase, thereby reducing the engine 103 start-up time and improving the power response speed.

[0083] S202: Acquire vehicle operating condition data when it is determined that the vehicle has entered the starting state.

[0084] In this embodiment, after the VCU controls the vehicle to enter the idle electric four-wheel drive mode, it can determine whether the vehicle has entered the starting state by obtaining the vehicle's gear position and the current throttle opening.

[0085] Specifically, if the current gear is detected to be drive and the current throttle opening is greater than a first threshold, the vehicle is determined to be in a starting state. This first threshold can be set to zero. In other words, once the driver is detected to have shifted the vehicle into drive and pressed the accelerator pedal, the vehicle is considered to be in a starting state. Compared to determining whether the vehicle has entered a starting state based on its current speed, judging by the current gear and throttle opening provides a more accurate assessment of the vehicle's true state. This avoids situations where the vehicle is stuck, such as when it is slipping, and fails to detect that it is in a starting state, thus preventing a smooth transition to direct drive mode.

[0086] In this embodiment, after detecting that the vehicle has entered the start-up state, the VCU will acquire vehicle operating condition data in real time to detect whether the vehicle meets the mode switching conditions. Specifically, the vehicle operating condition data may include the current throttle opening, current vehicle speed, and current battery charge.

[0087] S203: Based on vehicle operating data, determine whether the vehicle meets the mode switching conditions.

[0088] In this embodiment, the driver's driving intention can be effectively sensed based on the current throttle opening, such as determining whether the driver has pressed the accelerator pedal deeply; based on the vehicle speed and the current battery charge, it can be effectively determined whether the vehicle's own operating conditions meet the conditions for mode switching. For example, if the speed is high or the current battery charge is low, it means that the vehicle's own operating conditions no longer meet the conditions for mode switching.

[0089] In this embodiment, by comprehensively analyzing three variables—current throttle opening, current vehicle speed, and current battery charge—it is possible to accurately determine whether the vehicle meets the conditions for mode switching, thereby avoiding misoperation when it is not necessary or impossible to switch to direct drive mode.

[0090] S204: When it is determined that the vehicle meets the mode switching conditions, control the clutch 104 to close so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor 101, the rear drive motor 102 and the engine 103 are all in the driving state.

[0091] In this embodiment, if the VCU detects that the vehicle meets the mode switching conditions, that is, not only does the driver have a strong power demand, but the vehicle's own operating conditions also meet the mode switching conditions, then since the engine 103 has been pre-started, by controlling the clutch 104 to close, the engine 103 can directly output torque through the clutch 104, and work together with the front drive motor 101 and the rear drive motor 102 to drive the vehicle, achieving better acceleration performance and faster power response. The mode switching is more seamless and faster, solving the problem of untimely power response when the vehicle switches modes during the start-up phase in related technologies, and effectively improving the driver's driving experience.

[0092] In one feasible implementation, S203 may specifically include the following steps:

[0093] S203-1: Based on the current throttle opening, determine whether the driver has a strong power demand.

[0094] In this embodiment, the VCU can jointly determine whether the driver has a strong power demand by using two parameters: the current throttle opening and the rate of change of the current throttle opening. That is, the greater the current throttle opening and the rate of change of the throttle opening, the greater the driver's power demand.

[0095] Specifically, if the current throttle opening is greater than the second opening threshold and the current throttle opening change rate is greater than the change rate threshold, then it can be determined that the driver has a strong power demand.

[0096] It should be noted that the second opening threshold and the rate of change threshold are related to the slope of the vehicle's location; the steeper the slope, the smaller the second opening threshold and the rate of change threshold. By constructing a first mapping relationship between slope and the second opening threshold, and a second mapping relationship between slope and the rate of change threshold, the second opening threshold and the rate of change threshold corresponding to the current slope can be determined by looking up a table. This allows for more accurate identification of whether the driver has a strong power demand under different road conditions, avoiding misjudgments and switching to direct drive mode when no mode switching is necessary.

[0097] S203-2: If it is determined that the driver has a strong power demand, determine whether the vehicle meets the conditions for mode switching based on the current vehicle speed and the current battery charge.

[0098] In this embodiment, when it is determined that the driver has a strong power demand, by analyzing the current vehicle speed, it can be determined whether the vehicle has already started. If the vehicle speed is high, it means that the vehicle has already started, and there is no need to switch to direct drive mode. By analyzing the current battery charge, it can be effectively determined whether the vehicle has enough power to support the vehicle to enter direct drive mode. If the current battery charge is low, it means that the battery does not have enough power to support mode switching.

[0099] Specifically, the vehicle can be determined to meet the mode switching conditions if the current vehicle speed is less than a speed threshold and the current battery level is greater than a charge threshold. The speed threshold can be set to 30 km / h. That is, if the detected current vehicle speed is greater than or equal to 30 km / h, it means that the vehicle has already started and entered the driving phase, and there is no need to switch modes at this time.

[0100] Furthermore, after the vehicle enters the driving phase, it can be controlled according to the mode switching strategy for the driving phase. Specifically, after detecting that the vehicle's current speed is greater than or equal to the speed threshold, that is, after determining that the vehicle has entered the driving phase, it can continuously detect whether the driver has a strong power demand for the driving phase within a preset time, such as 10 seconds. If a strong power demand for the driving phase is detected within 10 seconds, the vehicle can be controlled to switch from the idle electric four-wheel drive mode to the direct drive mode to meet the driver's power demand for the driving phase. If no strong power demand for the driving phase is detected within 10 seconds, the engine is turned off and the vehicle is controlled to drive in pure electric four-wheel drive mode to avoid the engine being idle for a long time, causing unnecessary fuel waste.

[0101] It should be noted that both the speed threshold and the battery threshold are related to the slope of the vehicle's location. Specifically, the steeper the slope, the lower the speed threshold; conversely, the steeper the slope, the higher the battery threshold. By constructing a third mapping relationship between slope and speed threshold, and a fourth mapping relationship between slope and battery threshold, the speed threshold and battery threshold corresponding to the current slope can be determined by looking up a table. This ensures that the vehicle has sufficient battery power to meet its climbing needs in incline scenarios.

[0102] In one feasible implementation, S204 may specifically include the following steps:

[0103] S204-1: When it is determined that the vehicle meets the mode switching conditions, the speed of engine 103 is increased so that the speed of engine 103 meets the clutch 104 engagement condition.

[0104] In this embodiment, since the front drive motor 101 is in a driving state in the idle electric four-wheel drive mode, the condition for the clutch 104 to close includes at least the speed difference between the two ends of the clutch 104 being less than the speed difference threshold. The speed difference between the two ends of the clutch 104 is the speed difference between the front drive motor 101 and the engine 103. Therefore, before controlling the clutch 104 to close, it is necessary to control the speed of the engine 103 to increase so that the speed difference between the two ends of the clutch 104 can be less than the speed difference threshold.

[0105] In a specific implementation, S204-1 may include the following steps:

[0106] S204-1-1: If the vehicle meets the mode switching conditions, an engine 103 activation request will be sent to the transmission controller.

[0107] S204-1-2: Obtain the engine speed control request and target speed curve returned by the transmission controller in response to the engine 103 activation request.

[0108] In this embodiment, after the VCU sends an activation request to the engine 103 of the transmission controller, the transmission controller monitors the current speed of the drive motor in real time. Based on the current speed of the drive motor, it can generate a target speed curve for controlling the engine 103 and feed back the engine 103 speed control request and the target speed curve to the VCU. The engine 103 speed control request instructs the VCU to switch the control mode of the engine 103 from torque control mode to speed control mode.

[0109] S204-1-3: In response to the engine 103 speed control request, a speed following request containing a target speed curve is sent to the engine controller; the speed following request is used to instruct the engine controller to control the engine 103 to follow the target speed curve.

[0110] In this embodiment, after the VCU obtains the engine 103 speed control request sent by the transmission controller, it switches the control mode of the engine 103 from torque control mode to speed control mode, and sends a speed following request containing the target speed curve to the engine controller, so that the engine controller follows the target speed curve sent by the transmission controller.

[0111] S204-1-4: Upon receiving the clutch slippage status information sent by the transmission controller, determine that the engine speed 103 meets the clutch 104 closing condition; wherein, the clutch slippage status information is generated by the transmission controller when it detects that the speed difference between the two ends of the clutch 104 is less than the speed difference threshold and the clutch 104 has completed the oil pre-charge.

[0112] In this embodiment, as the engine controller follows the target speed curve, the speed of the engine 103 will continuously increase until the speed difference between the two ends of the clutch 104 is less than the speed difference threshold. At this time, the transmission controller will control the clutch 104 to complete the oil pre-charging in 150ms. After the clutch 104 completes the oil pre-charging, it indicates that the clutch 104 is ready to close. At this time, the transmission controller will send clutch slippage status information to the VCU. This clutch slippage status information is used to indicate that the VCU can control the clutch 104 to close.

[0113] S204-2: When the engine speed 103 meets the clutch 104 engagement condition, control the clutch 104 to engage so that the vehicle switches from idle electric four-wheel drive mode to direct drive mode.

[0114] In this embodiment, after the VCU obtains the clutch slippage state information, it determines that the engine speed 103 meets the clutch 104 closing condition. At this time, it controls the clutch 104 to close, so as to complete the switching from idle electric four-wheel drive mode to direct drive mode.

[0115] In its implementation, when the engine speed 103 meets the clutch 104 engagement condition, the VCU sends a torque increase request to the transmission controller. Upon receiving this request, the transmission controller, having pre-charged the clutch 104 with fluid, quickly responds to the request by increasing the clutch 104 torque until the clutch 104 is fully engaged. After the clutch 104 is fully engaged, the transmission controller feeds this information back to the VCU, informing it that the vehicle has switched from idle electric four-wheel drive mode to direct drive mode.

[0116] In this embodiment, after the VCU determines that the vehicle has switched from the idle electric four-wheel drive mode to the direct drive mode, it will switch the control mode for the engine 103 from the speed control mode back to the torque control mode, so that the engine 103 can quickly output torque through the clutch 104 to meet the driver's acceleration needs and power response needs during the start-up phase.

[0117] It should be noted that in direct drive mode, the VCU will control the engine 103, front drive motor 101, and rear drive motor 102 to jointly drive the vehicle according to a preset torque distribution strategy. Specifically, the torque distribution strategy includes a front axle torque distribution strategy and a rear axle torque output strategy. The VCU is used to execute the front axle torque distribution strategy, allocating different output torques to the front drive motor 101 and the engine 103 to jointly drive the front axle of the vehicle. At the same time, the VCU is also used to execute the rear axle torque output strategy, controlling the output torque of the rear drive motor 102 to drive the rear axle of the vehicle.

[0118] Secondly, based on the same inventive concept, and referring to... Figure 3 This application provides a hybrid vehicle start-up control device 300, which includes:

[0119] The first control module 301 is used to control the vehicle to enter the idle electric four-wheel drive mode when the vehicle is detected to start. In the idle electric four-wheel drive mode, the front drive motor 101 and the rear drive motor 102 of the vehicle are in the driving state, the engine 103 is in the idling state, and the clutch 104 is in the disengaged state.

[0120] The first acquisition module 302 is used to acquire vehicle operating data when it is determined that the vehicle has entered the starting state; the vehicle operating data includes the current throttle opening, the current vehicle speed and the current battery charge.

[0121] The first determining module 303 is used to determine whether the vehicle meets the mode switching conditions based on vehicle operating condition data.

[0122] The second control module 304 is used to control the clutch 104 to close when the vehicle meets the mode switching conditions, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor 101, the rear drive motor 102 and the engine 103 are all in the driving state.

[0123] In one embodiment of this application, the start-up control device 300 of the hybrid vehicle further includes:

[0124] The second acquisition module is used to acquire the vehicle's current gear and current throttle opening;

[0125] The second determining module is used to determine that the vehicle has entered the starting state when the current gear is a forward gear and the current throttle opening is greater than the first opening threshold.

[0126] In one embodiment of this application, the first determining module 303 includes:

[0127] The power demand determination submodule is used to determine whether the driver has a strong power demand based on the current throttle opening.

[0128] The switching condition determination submodule is used to determine whether the vehicle meets the mode switching conditions based on the current vehicle speed and current battery level when it is determined that the driver has a strong power demand.

[0129] In one embodiment of this application, the power demand determination submodule is specifically used to determine that the driver has a strong power demand when the current throttle opening is greater than a second opening threshold and the current throttle opening change rate is greater than a change rate threshold.

[0130] In one embodiment of this application, the switching condition determination submodule is specifically used to determine that the vehicle meets the mode switching conditions when the current vehicle speed is less than the speed threshold and the current battery charge is greater than the charge threshold.

[0131] In one embodiment of this application, the second control module 304 includes:

[0132] The speed control submodule is used to control the speed of engine 103 to increase when the vehicle meets the mode switching conditions, so that the speed of engine 103 meets the clutch 104 engagement conditions.

[0133] The torque control submodule is used to control the clutch 104 to close when the engine speed 103 meets the clutch 104 closing condition, so that the vehicle can switch from idle electric four-wheel drive mode to direct drive mode.

[0134] In one embodiment of this application, the speed control submodule includes:

[0135] The activation request sending unit is used to send an engine 103 activation request to the transmission controller when it is determined that the vehicle meets the mode switching conditions.

[0136] The target speed acquisition unit is used to acquire the engine speed control request and target speed curve returned by the transmission controller in response to the engine 103 activation request.

[0137] The speed follow request sending unit is used to send a speed follow request containing a target speed curve to the engine controller in response to the speed control request of the engine 103; the speed follow request is used to instruct the engine controller to control the engine 103 to follow the target speed curve;

[0138] The closure condition determination unit is used to determine whether the speed of the engine 103 meets the closure condition of the clutch 104 when the clutch slippage state information sent by the transmission controller is obtained; wherein, the clutch slippage state information is generated by the transmission controller when it detects that the speed difference between the two ends of the clutch 104 is less than the speed difference threshold and the clutch 104 has completed the oil pre-charge.

[0139] In one embodiment of this application, the torque control submodule includes:

[0140] The torque request sending unit is used to send an increased torque request to the transmission controller when the engine speed 103 meets the clutch 104 engagement condition, so that the transmission controller increases the clutch 104 torque in response to the increased torque request until the clutch 104 is fully engaged.

[0141] The mode switching determination unit is used to determine that the vehicle has switched from idle electric four-wheel drive mode to direct drive mode when the clutch 104 is fully engaged.

[0142] It should be noted that the specific implementation of the hybrid vehicle start control device 300 in this application embodiment refers to the specific implementation of the hybrid vehicle start control method proposed in the first aspect of the above-mentioned application embodiment, and will not be repeated here.

[0143] Thirdly, based on the same inventive concept, and referring to... Figure 4 This application provides a start-up control system for a hybrid vehicle, the system including a vehicle controller 401, a transmission controller 402, and an engine controller 403; wherein,

[0144] The vehicle controller 401 is used to send a first control request to the engine controller 403 and a second control request to the transmission controller 402 when the vehicle is detected to start, so as to control the vehicle to enter the idle electric four-wheel drive mode.

[0145] The engine controller 403 is used to control the engine 103 to start and idle in response to the first control request;

[0146] The transmission controller 402 is used to control the front drive motor 101 and the rear drive motor 102 of the vehicle to be in a driving state and the clutch 104 to be in a disengaged state in response to a second control request.

[0147] The vehicle controller 401 is also used to acquire vehicle operating condition data when it is determined that the vehicle has entered the starting state, and to determine whether the vehicle meets the mode switching conditions based on the vehicle operating condition data; and to send a mode switching request to the transmission controller 402 when it is determined that the vehicle meets the mode switching conditions.

[0148] The transmission controller 402 is also used to control the clutch 104 to close in response to a mode switching request, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor 101, the rear drive motor 102 and the engine 103 are all in a driving state.

[0149] It should be noted that the specific implementation of the hybrid vehicle start control system in this application embodiment refers to the specific implementation of the hybrid vehicle start control method proposed in the first aspect of this application, and will not be repeated here.

[0150] Fourthly, based on the same inventive concept, referring to Figure 5 This application provides a vehicle 500, including the start control system for a hybrid vehicle proposed in the third aspect of this application.

[0151] It should be noted that the specific implementation of the vehicle 500 in this application embodiment refers to the specific implementation of the hybrid vehicle start control system proposed in the third aspect of the above-mentioned application embodiment, and will not be repeated here.

[0152] Fifthly, based on the same inventive concept, embodiments of this application provide a storage medium storing machine-executable instructions, which, when executed by a processor, implement the hybrid vehicle start-up control method proposed in the first aspect of this application.

[0153] It should be noted that the specific implementation of the storage medium in the embodiments of this application refers to the specific implementation of the hybrid vehicle start-up control method proposed in the first aspect of this application, and will not be repeated here.

[0154] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, embodiments of the present invention can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0155] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0156] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0157] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0158] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0159] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0160] The above provides a detailed description of the starting control method, device, system, vehicle, and storage medium for a hybrid vehicle provided by the present invention. 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 starting control method for a hybrid vehicle, characterized in that, The method includes: When the vehicle is detected to be starting, the vehicle is controlled to enter the idle electric four-wheel drive mode; in the idle electric four-wheel drive mode, the front drive motor and the rear drive motor of the vehicle are in driving state, the engine is in idling state, and the clutch is in disengaged state. Once it is determined that the vehicle has entered the starting state, vehicle operating data is acquired; the vehicle operating data includes the current throttle opening, current vehicle speed, and current battery charge. Based on the vehicle operating data, determine whether the vehicle meets the mode switching conditions; If the vehicle meets the mode switching conditions, the clutch is controlled to close, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor, the rear drive motor and the engine are all in a driving state. Wherein, controlling the clutch to engage when it is determined that the vehicle meets the mode switching conditions, so as to switch the vehicle from the idle electric four-wheel drive mode to the direct drive mode, includes: If the vehicle meets the mode switching conditions, the engine speed is controlled to increase so that the engine speed meets the clutch engagement conditions. The step of controlling the engine speed to increase so that the engine speed meets the clutch engagement condition, when it is determined that the vehicle meets the mode switching conditions, includes: If the vehicle meets the mode switching conditions, an engine activation request is sent to the transmission controller. Obtain the engine speed control request and target speed curve returned by the transmission controller in response to the engine activation request; In response to the engine speed control request, a speed following request containing the target speed curve is sent to the engine controller; the speed following request is used to instruct the engine controller to control the engine to follow the target speed curve; Upon receiving the clutch slippage status information sent by the transmission controller, it is determined that the engine speed meets the clutch engagement condition; wherein, the clutch slippage status information is generated by the transmission controller when it detects that the speed difference between the two ends of the clutch is less than the speed difference threshold and the clutch has completed oil pre-charging.

2. The hybrid vehicle start-up control method according to claim 1, characterized in that, After detecting that the vehicle has started, and controlling the vehicle to enter idle electric four-wheel drive mode, the method further includes: Obtain the current gear and current throttle opening of the vehicle; When the current gear is a forward gear and the current throttle opening is greater than a first opening threshold, the vehicle is determined to enter the starting state.

3. The hybrid vehicle start-up control method according to claim 1, characterized in that, The step of determining whether the vehicle meets the mode switching conditions based on the vehicle operating data includes: Based on the current throttle opening, determine whether the driver has a strong power demand; If it is determined that the driver has a strong power demand, based on the current vehicle speed and the current battery charge, it is determined whether the vehicle meets the mode switching conditions.

4. The hybrid vehicle start-up control method according to claim 3, characterized in that, The step of determining whether the driver has a strong power demand based on the current throttle opening includes: If the current throttle opening is greater than the second opening threshold and the current throttle opening change rate is greater than the change rate threshold, it is determined that the driver has a strong power demand.

5. The hybrid vehicle start-up control method according to claim 3, characterized in that, The step of determining whether the vehicle meets the mode switching conditions based on the current vehicle speed and the current battery charge includes: If the current vehicle speed is less than a speed threshold and the current battery charge is greater than a charge threshold, it is determined that the vehicle meets the mode switching conditions.

6. The hybrid vehicle start-up control method according to claim 1, characterized in that, The step of controlling the clutch to engage so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode, when it is determined that the vehicle meets the mode switching conditions, further includes: When the engine speed meets the clutch engagement condition, the clutch is controlled to engage, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode.

7. The hybrid vehicle start-up control method according to claim 6, characterized in that, When the engine speed meets the clutch engagement condition, controlling the clutch to engage to switch the vehicle from the idle electric four-wheel drive mode to the direct drive mode includes the following steps: When the engine speed meets the clutch engagement condition, a torque increase request is sent to the transmission controller, so that the transmission controller increases the clutch torque in response to the torque increase request until the clutch is fully engaged; With the clutch fully engaged, it is determined that the vehicle has switched from the idle electric four-wheel drive mode to the direct drive mode.

8. A starting control device for a hybrid vehicle, characterized in that, The device includes: The first control module is used to control the vehicle to enter the idle electric four-wheel drive mode when the vehicle is detected to start; in the idle electric four-wheel drive mode, the front drive motor and the rear drive motor of the vehicle are in the driving state, the engine is in the idle state, and the clutch is in the disengaged state. The first acquisition module is used to acquire vehicle operating condition data when it is determined that the vehicle has entered the starting state; the vehicle operating condition data includes the current throttle opening, the current vehicle speed, and the current battery charge. The first determining module is used to determine whether the vehicle meets the mode switching conditions based on the vehicle operating condition data. The second control module is used to control the clutch to close when it is determined that the vehicle meets the mode switching conditions, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor, the rear drive motor and the engine are all in a driving state. The second control module includes: The speed control submodule is used to control the engine speed to increase when the vehicle meets the mode switching conditions, so that the engine speed meets the clutch engagement conditions. The speed control submodule includes: The activation request sending unit is used to send an engine activation request to the transmission controller when it is determined that the vehicle meets the mode switching conditions. The target speed acquisition unit is used to acquire the engine speed control request and target speed curve returned by the transmission controller in response to the engine activation request; The speed follow request sending unit is used to send a speed follow request containing a target speed curve to the engine controller in response to an engine speed control request; the speed follow request is used to instruct the engine controller to control the engine to follow the target speed curve; The closure condition determination unit is used to determine whether the engine speed meets the clutch closure condition when the clutch slippage state information sent by the transmission controller is obtained; wherein, the clutch slippage state information is generated by the transmission controller when it detects that the speed difference between the two ends of the clutch is less than the speed difference threshold and the clutch has completed the pre-charge of oil.

9. A starting control system for a hybrid vehicle, characterized in that, The system includes a vehicle controller, a transmission controller, and an engine controller; wherein... The vehicle controller is used to send a first control request to the engine controller and a second control request to the transmission controller when the vehicle is detected to start, so as to control the vehicle to enter the idle electric four-wheel drive mode. The engine controller is used to respond to the first control request by controlling the engine to start and idle. The transmission controller is used to respond to the second control request by controlling the front drive motor and the rear drive motor of the vehicle to be in a driving state and the clutch to be in a disengaged state. The vehicle controller is also used to acquire vehicle operating condition data when it is determined that the vehicle has entered the starting state, and to determine whether the vehicle meets the mode switching conditions based on the vehicle operating condition data; and to send a mode switching request to the transmission controller when it is determined that the vehicle meets the mode switching conditions. The transmission controller is also configured to control the clutch to engage in response to the mode switching request, so that the vehicle switches from the idle electric four-wheel drive mode to the direct drive mode; in the direct drive mode, the front drive motor, the rear drive motor and the engine are all in a driving state.

10. A vehicle, characterized in that, Including the start-up control system for hybrid vehicles as described in claim 9.

11. A storage medium, characterized in that, The storage medium stores machine-executable instructions, which, when executed by a processor, implement the hybrid vehicle start-up control method as described in any one of claims 1-7.

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