Vehicle starting method, device and vehicle

Abstract

The present invention provides a vehicle starting method, device and vehicle, the method comprising dividing different shutdown stages according to changes in operating condition parameters in a shutdown process, and dividing different starting stages according to changes in operating condition parameters in a starting process. When the vehicle is in the shutdown process and a starting command is triggered, the real-time operating condition parameters of the vehicle are obtained, and a target shutdown stage corresponding to the vehicle in at least two shutdown stages is determined according to the real-time operating condition parameters. At this time, in response to the starting command, the vehicle can be controlled to enter a target starting stage in the starting stage corresponding to the operating condition parameters of the target shutdown stage to execute the starting process. When the starting command is triggered in the shutdown process, there is no need to wait for the shutdown process to be completed before starting the starting process, and the target starting stage corresponding to the operating condition parameters is directly entered from the target shutdown stage, thereby reducing the time consumption of responding to the starting command and improving the response efficiency. There is no need to fully execute the shutdown and starting processes, thereby reducing the energy consumption of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a vehicle starting method, a vehicle starting device and a vehicle. Background Art

[0002] During use, the vehicle can automatically start and stop according to operating conditions to achieve the purpose of reducing fuel consumption and emissions. At this time, a start command may be triggered during the shutdown process.

[0003] In the related art, when a vehicle triggers a start command during the execution of a shutdown process, the start process will be executed after the shutdown process is completed, which makes the time from triggering the start command to the end of the start process long and the delay high, and the energy consumption of the shutdown and start processes is also high. For example, in a single-motor hybrid vehicle, it can be divided into four architectures of P (Position) 0 to 4 according to the motor position. Among them, the complete starting process of a hybrid vehicle with a P2 architecture needs to request the torque of the P2 motor to drag the engine to increase the engine speed, thereby causing energy loss. Summary of the invention

[0004] In view of this, the present invention aims to provide a vehicle starting method, device and vehicle, so as to improve the response efficiency to the start command in the vehicle shutdown process and reduce the response energy consumption.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A vehicle starting method, the method may include:

[0007] When the vehicle is in a shutdown process and a start command is triggered, obtaining real-time operating parameters of the vehicle;

[0008] Determining a target stop phase corresponding to the vehicle in at least two stop phases according to the real-time operating condition parameters, wherein the at least two stop phases are obtained by dividing according to changes in the operating condition parameters in the stop process;

[0009] Determine a target startup phase having the operating condition parameters corresponding to the target shutdown phase in at least two startup phases, wherein the at least two startup phases are obtained by dividing according to changes in the operating condition parameters in the startup process;

[0010] In response to the start instruction, the vehicle is controlled to execute a start process starting from the target start phase.

[0011] Furthermore, when the vehicle is in the shutdown process and a start command is triggered, before obtaining the real-time operating condition parameters of the vehicle, the method further includes:

[0012] According to the change of the first operating condition parameter in the shutdown process, the engine torque reduction stage, the clutch torque reduction stage and the engine speed reduction stage are obtained by stage division, wherein the first operating condition parameter includes at least one of the engine torque, the motor negative torque, the first clutch torque and the engine speed, and the first clutch is located between the motor and the engine;

[0013] According to the change of the second operating condition parameter in the starting process, the stages are divided into slip establishment stage, drag stage and speed synchronization stage, the second clutch is located between the motor and the gearbox, and the second operating condition parameter includes at least one of the second clutch shaft speed, motor speed, motor torque, the first clutch torque, the engine speed, and the gearbox shaft speed.

[0014] Furthermore, the stage division according to the change of the first operating condition parameter in the shutdown process to obtain the engine torque reduction stage, the clutch torque reduction stage and the engine speed reduction stage includes:

[0015] In the shutdown process, the stage in which the engine torque is reduced to less than the first torque threshold and the motor negative torque is increased to the second torque threshold is divided into the engine torque reduction stage;

[0016] In the shutdown process, the stage in which the first clutch torque is reduced to less than the third torque threshold is divided into the clutch torque reduction stage;

[0017] In the shutdown process, the stage in which the engine speed is reduced to less than the first engine speed threshold is divided into the engine speed reduction stage.

[0018] Furthermore, the step of dividing the phases according to the change of the second operating condition parameter in the startup process to obtain the slip establishment phase, the drag phase and the speed synchronization phase includes:

[0019] In the startup process, the second clutch shaft speed is reduced, and the motor speed is increased until the motor speed differs from the second clutch shaft speed by a preset compensation value, and the stage of establishing slip is divided into the slip establishment stage for a preset time period;

[0020] In the starting process, the stage of increasing the motor torque and the first clutch torque to increase the engine speed to be greater than or equal to the second engine speed threshold by dragging is divided into the dragging stage;

[0021] In the starting process, after the engine speed is increased until the difference between the engine speed and the motor speed is less than a preset difference, the first clutch torque is increased to synchronize the engine speed with the motor speed, and then the motor torque is reduced to synchronize the motor speed with the gearbox shaft speed. This stage is divided into the speed synchronization stage.

[0022] Further, the real-time operating condition parameter includes at least a real-time engine speed, and the determining of the target starting phase having the operating condition parameter corresponding to the target shutdown phase in the at least two starting phases includes:

[0023] When the target shutdown phase is the engine torque reduction phase, determining that the vehicle completes the startup process;

[0024] When the target shutdown phase is the clutch torque reduction phase, determining the speed synchronization phase as the target startup phase;

[0025] In a case where the target shutdown phase is the engine speed reduction phase, the target startup phase is determined in at least two startup phases according to the real-time engine speed.

[0026] Further, when the target shutdown stage is the engine speed reduction stage, determining the target startup stage in at least two startup stages according to the real-time engine speed includes:

[0027] When the real-time engine speed is greater than or equal to a third engine speed threshold and a torque architecture of the vehicle is in an activated state, determining the speed synchronization phase as the target startup phase, the torque architecture being used to distribute torque according to operating condition parameters;

[0028] When the real-time engine speed is greater than or equal to the third engine speed threshold and the torque architecture is in an inactive state, determining the drag phase as the target startup phase;

[0029] When the real-time engine speed is less than the third engine speed threshold, the slip establishment phase is determined as the target starting phase.

[0030] Further, when the real-time engine speed is less than the third engine speed threshold, determining the slip establishment phase as the target startup phase specifically includes:

[0031] When the real-time engine speed is less than the third engine speed threshold and the real-time engine speed is greater than the resonance speed, the slip establishment phase is determined to be the target starting phase, and the resonance speed is the engine speed that causes the dual mass flywheel of the engine to resonate.

[0032] Compared with the prior art, the vehicle starting method of the present invention has the following advantages:

[0033] In an embodiment of the present invention, different shutdown stages are divided according to changes in operating condition parameters in the shutdown process, and different startup stages are divided according to changes in operating condition parameters in the startup process. When the vehicle is in the shutdown process and a startup command is triggered, the real-time operating condition parameters of the vehicle are obtained, and the target shutdown stage corresponding to the vehicle in at least two shutdown stages is determined according to the real-time operating condition parameters. At this time, in response to the startup command, the vehicle can be controlled to enter the target startup stage corresponding to the operating condition parameters of the target shutdown stage in the startup stage to execute the startup process. When the startup command is triggered in the shutdown process, the embodiment of the present invention does not need to wait for the shutdown process to be completed and then start the startup process from the beginning, but directly enters the target startup stage corresponding to the operating condition parameters from the target shutdown stage, which reduces the time consumption of responding to the startup command, improves the response efficiency, and reduces the delay. At the same time, there is no need to fully execute the shutdown and startup processes, which reduces the energy consumption of the vehicle.

[0034] Another object of the present invention is to provide a vehicle starting device to improve the response efficiency to the start command in the vehicle shutdown process and reduce the response energy consumption.

[0035] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0036] A vehicle starting device, the device may include:

[0037] A real-time operating condition parameter acquisition module, which acquires the real-time operating condition parameters of the vehicle when the vehicle is in a shutdown process and a start command is triggered;

[0038] a target stop phase determination module, configured to determine a target stop phase corresponding to the vehicle in at least two stop phases according to the real-time operating condition parameters, wherein the at least two stop phases are obtained by dividing according to changes in the operating condition parameters in the stop process;

[0039] A target startup phase determination module, used to determine a target startup phase having the operating condition parameters corresponding to the target shutdown phase in at least two startup phases, wherein the at least two startup phases are obtained by dividing according to changes in the operating condition parameters in the startup process;

[0040] The startup process execution module is used to control the vehicle to execute the startup process from the target startup phase in response to the startup instruction.

[0041] Furthermore, the device also includes:

[0042] a shutdown phase division module, configured to divide the phases into an engine torque reduction phase, a clutch torque reduction phase and an engine speed reduction phase according to the change of a first operating condition parameter in the shutdown process, wherein the first operating condition parameter includes at least one of an engine torque, a motor negative torque, a first clutch torque and an engine speed, and the first clutch is located between the motor and the engine;

[0043] A starting phase division module is used to divide the phases according to the change of the second operating condition parameter in the starting process to obtain a slip establishment phase, a drag phase and a speed synchronization phase, wherein the second clutch is located between the motor and the gearbox, and the second operating condition parameter includes at least one of the second clutch shaft speed, the motor speed, the motor torque, the first clutch torque, the engine speed, and the gearbox shaft speed.

[0044] Furthermore, the shutdown stage division module includes:

[0045] An engine torque reduction submodule, used for dividing the stage in which the engine torque is reduced to less than a first torque threshold and the motor negative torque is increased to a second torque threshold into the engine torque reduction stage during the shutdown process;

[0046] A clutch torque reduction submodule, used for dividing the stage in which the first clutch torque is reduced to less than a third torque threshold into the clutch torque reduction stage in the shutdown process;

[0047] The engine speed reduction submodule is used to divide the stage in which the engine speed is reduced to less than a first engine speed threshold into the engine speed reduction stage during the shutdown process.

[0048] Furthermore, the startup partitioning module includes:

[0049] A slip establishment submodule, used for reducing the shaft speed of the second clutch and increasing the motor speed to a preset compensation value between the motor speed and the shaft speed of the second clutch during the startup process, and dividing the stage of establishing slip into the slip establishment stage for a preset period of time;

[0050] a dragging submodule, for dividing, in a starting process, a stage in which the motor torque and the first clutch torque are increased to drag and increase the engine speed to be greater than or equal to a second engine speed threshold into the dragging stage;

[0051] The speed synchronization submodule is used to increase the engine speed until the difference between the engine speed and the motor speed is less than a preset difference, increase the first clutch torque to synchronize the engine speed with the motor speed, and then reduce the motor torque to synchronize the motor speed with the gearbox shaft speed during the startup process, and divide the stage into the speed synchronization stage.

[0052] The real-time operating condition parameter includes at least the real-time engine speed. The target startup phase determination module includes:

[0053] A first target startup phase determination submodule, configured to determine that the vehicle completes the startup process when the target shutdown phase is the engine torque reduction phase;

[0054] A second target startup phase determination submodule, configured to determine the speed synchronization phase as a target startup phase when the target shutdown phase is the clutch torque reduction phase;

[0055] The third target startup phase determination submodule is configured to determine the target startup phase in at least two startup phases according to the real-time engine speed when the target shutdown phase is the engine speed reduction phase.

[0056] The third target startup phase determination submodule includes:

[0057] a first target startup phase determination unit, configured to determine that the speed synchronization phase is the target startup phase when the real-time engine speed is greater than or equal to a third engine speed threshold and a torque architecture of the vehicle is in an activated state, the torque architecture being used to distribute torque according to operating condition parameters;

[0058] a second target startup phase determination unit, configured to determine that the drag phase is the target startup phase when the real-time engine speed is greater than or equal to the third engine speed threshold and the torque architecture is in an inactive state;

[0059] The third target startup phase determining unit is configured to determine, when the real-time engine speed is less than the third engine speed threshold, that the slip establishment phase is the target startup phase.

[0060] Furthermore, the third target starting phase determination unit is specifically used to determine that the slip establishment phase is the target starting phase when the real-time engine speed is less than the third engine speed threshold and the real-time engine speed is greater than the resonant speed, and the resonant speed is the engine speed that causes the dual-mass flywheel resonance of the engine.

[0061] Compared with the prior art, the vehicle starting device of the present invention and the above-mentioned vehicle starting method have the same advantages over the prior art, which will not be repeated here.

[0062] Another object of the present invention is to provide a vehicle, which is used to implement the above-mentioned vehicle starting method or is equipped with the above-mentioned vehicle starting device.

[0063] Compared with the prior art, the advantages of the vehicle of the present invention and the above-mentioned vehicle starting method over the prior art are the same, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0065] Figure 1 is a flow chart of steps of a vehicle starting method provided by an embodiment of the present invention;

[0066] Figure 2 is a flowchart of another vehicle starting method provided by an embodiment of the present invention;

[0067] Figure 3 The present invention is a structural block diagram of a vehicle starting device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0068] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0069] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0070] Figure 1 is a flow chart of the steps of a vehicle starting method provided by an embodiment of the present invention, such as Figure 1 As shown, the method may include:

[0071] Step 101: When a vehicle is in a shutdown process and a start command is triggered, obtain real-time operating parameters of the vehicle.

[0072] In an embodiment of the present invention, it is applied to the case where a vehicle is in a shutdown process and a start command is triggered, wherein the vehicle shutdown in the shutdown process refers to the case where the vehicle's entire vehicle state meets the shutdown conditions, and the vehicle is not currently in a situation where the shutdown command is prohibited, and the shutdown command is triggered, thereby executing the shutdown process. Optionally, after the shutdown command is triggered, it can be determined which shutdown process it is, such as a fault shutdown, power-off shutdown, normal shutdown, etc. In order to avoid factors such as faults affecting the start of the vehicle, the solution of this application can be executed during the normal shutdown process, and other types of shutdown processes are not considered. Similarly, the triggering of the start command can be a situation where the vehicle's entire vehicle state meets the startup conditions, and the vehicle is not currently in a situation where the shutdown command is prohibited.

[0073] In an embodiment of the present invention, when the vehicle is in a shutdown process and a start command is triggered, the real-time operating parameters of the vehicle can be obtained, wherein the real-time operating parameters may include the operating parameters of various components of the vehicle when the start command is triggered, such as the engine, clutch, motor, gearbox and other components when the start command is triggered, etc., so as to facilitate determining the operating state of the vehicle when the start command is triggered.

[0074] Step 102: determining a target stop phase corresponding to the vehicle in at least two stop phases according to the real-time operating condition parameters, wherein the at least two stop phases are obtained according to changes in the operating condition parameters in the stop process.

[0075] In the embodiment of the present invention, at least two shutdown stages can be divided according to the change of the working condition parameters in the shutdown process, such as dividing the shutdown process according to the degree of increase or decrease of the working condition parameters, or according to the type of working condition parameters, such as the working condition parameters corresponding to the components that stop working in sequence in the shutdown process. Then, a target shutdown stage with similar working condition parameters can be determined in at least two shutdown stages according to the real-time working condition parameters. Since the stage is a division of the shutdown process, the working condition parameters will also change from the beginning to the end of each shutdown stage. Therefore, the target shutdown stage can be determined according to whether the real-time working condition parameters belong to the change range of the working condition parameters in different shutdown stages.

[0076] Step 103: determining a target startup phase having the operating condition parameters corresponding to the target shutdown phase in at least two startup phases, wherein the at least two startup phases are obtained by dividing according to changes in the operating condition parameters in the startup process.

[0077] In an embodiment of the present invention, at least two startup stages can be divided according to changes in operating condition parameters in the startup process, wherein the division of the shutdown stage can correspond to the relevant description of the aforementioned step 102. After determining the target shutdown stage, that is, after determining that the vehicle executes the shutdown process to the target shutdown stage, a target startup stage with corresponding operating condition parameters to the target shutdown stage can be further determined, wherein the corresponding operating condition parameters can refer to the operating status of each component in the vehicle determined according to the operating condition parameters. Optionally, the operating condition parameters corresponding to the target shutdown stage can be compared with the operating condition parameters of each startup stage to determine the target startup stage, and the corresponding relationship between the shutdown stage and the startup stage can also be preset according to the operating condition parameters, so that after determining the target shutdown stage, the target startup stage is determined according to the corresponding relationship. The embodiment of the present invention does not impose specific restrictions on this.

[0078] Step 104 : In response to the start instruction, control the vehicle to execute a start process from the target start phase.

[0079] In an embodiment of the present invention, after determining the target startup phase, the vehicle can be controlled in response to a startup instruction to directly transition from the target shutdown phase in the shutdown process to the target startup phase of the startup process, and the startup process can be executed in a postponed manner. This eliminates the need to wait for the shutdown process to end before executing the startup process when a startup instruction is triggered in the shutdown process, thereby improving the efficiency of responding to the startup instruction and reducing startup energy consumption.

[0080] In an embodiment of the present invention, different shutdown stages are divided according to changes in operating condition parameters in the shutdown process, and different startup stages are divided according to changes in operating condition parameters in the startup process. When the vehicle is in the shutdown process and a startup command is triggered, the real-time operating condition parameters of the vehicle are obtained, and the target shutdown stage corresponding to the vehicle in at least two shutdown stages is determined according to the real-time operating condition parameters. At this time, in response to the startup command, the vehicle can be controlled to enter the target startup stage corresponding to the operating condition parameters of the target shutdown stage in the startup stage to execute the startup process. When the startup command is triggered in the shutdown process, the embodiment of the present invention does not need to wait for the shutdown process to be completed and then start the startup process from the beginning, but directly enters the target startup stage corresponding to the operating condition parameters from the target shutdown stage, which reduces the time consumption of responding to the startup command, improves the response efficiency, and reduces the delay. At the same time, there is no need to fully execute the shutdown and startup processes, which reduces the energy consumption of the vehicle.

[0081] Figure 2 is a flowchart of another vehicle starting method provided by an embodiment of the present invention. Figure 2 As shown, the method may include:

[0082] Step 201, dividing the stages according to the change of the first operating condition parameter in the shutdown process to obtain the engine torque reduction stage, the clutch torque reduction stage and the engine speed reduction stage, the first operating condition parameter includes at least one of the engine torque, the motor negative torque, the first clutch torque, and the engine speed, and the first clutch is located between the motor and the engine.

[0083] In the embodiment of the present invention, the first operating condition parameter may refer to the operating condition parameter for dividing different shutdown stages in the shutdown process. The architecture may be different according to different vehicle models, so that the execution logic of each component in the shutdown process is different, thereby making the operating condition parameters different. Those skilled in the art can select the first operating condition parameter to divide the shutdown stage according to the needs of different vehicle models. Optionally, the embodiment of the present invention takes a hybrid vehicle with a P2 structure as an example. The P2 architecture refers to a motor architecture in which the motor is located between the engine and the gearbox, specifically the structure of the engine-first clutch-motor-second clutch-gearbox. The first operating condition parameter under the P2 architecture may include at least one of the engine torque, the motor negative torque, the first clutch torque, and the engine speed. The shutdown process can be divided into an engine torque reduction stage, in which the engine torque is reduced and the P2 motor exits energy recovery; a clutch torque reduction stage, in which the first clutch torque is reduced; and an engine speed reduction stage, in which the engine speed is reduced. Those skilled in the art can select different first operating condition parameters according to needs and divide the shutdown process, and the embodiment of the present invention does not impose specific restrictions on this.

[0084] Optionally, step 201 includes:

[0085] Step S11: In the shutdown process, the stage in which the engine torque is reduced to less than a first torque threshold and the motor negative torque is increased to a second torque threshold is divided into the engine torque reduction stage.

[0086] In the embodiment of the present invention, taking a P2 architecture hybrid vehicle as an example, during operation, the vehicle usually outputs torque from the engine, and the motor recovers energy through negative torque. After the shutdown command is triggered, the engine torque is reduced, and the motor increases the negative torque to exit the energy recovery stage. When the engine torque is reduced to the first torque threshold and the motor negative torque is increased to the second torque threshold, it can be considered that the engine torque reduction is completed. In the shutdown process, the above stage can be divided into the engine torque reduction stage. Optionally, the first torque threshold and the second torque threshold can be any values ​​such as 5N·m, 10N·m, etc., and those skilled in the art can set them according to the vehicle model requirements.

[0087] Step S12: In the shutdown process, the stage in which the first clutch torque is reduced to less than a third torque threshold is divided into the clutch torque reduction stage.

[0088] In the embodiment of the present invention, after the engine torque reduction stage, the first clutch torque can be reduced. The first clutch is located between the engine and the motor. Optionally, the first clutch torque can be released in a gradient torque reduction manner to ensure that the first clutch smoothly reduces torque. When the first clutch torque is reduced to the third torque threshold, it can be considered that the first clutch torque reduction is completed. In the shutdown process, the above stage can be divided into the clutch torque reduction stage. Optionally, the third torque threshold can be any value such as 5N·m, 10N·m, etc., and those skilled in the art can set it according to the vehicle model requirements.

[0089] Step S13: In the shutdown process, the stage in which the engine speed is reduced to less than the first engine speed threshold is divided into the engine speed reduction stage.

[0090] In the embodiment of the present invention, after the clutch torque reduction stage is over, the engine speed can be controlled to decrease. Optionally, the HCU (Hybrid Control Unit) can trigger a shutdown command to control the engine to shut down and reduce speed. When the engine speed is reduced to less than the first engine speed threshold, the shutdown process is confirmed to be completed. At this time, the above stage can be divided into an engine speed reduction stage. Optionally, the first engine speed threshold can be any value such as 250r / min (revolutions per minute), 300r / min, etc., and those skilled in the art can set it according to the vehicle model requirements.

[0091] Step 202, dividing the stages according to the change of the second operating condition parameter in the startup process to obtain a slip establishment stage, a drag stage and a speed synchronization stage, the second clutch is located between the motor and the gearbox, and the second operating condition parameter includes at least one of the second clutch shaft speed, the motor speed, the motor torque, the first clutch torque, the engine speed, and the gearbox shaft speed.

[0092] In the embodiment of the present invention, the second operating condition parameter may refer to the operating condition parameter for dividing different shutdown stages in the startup process. Optionally, the embodiment of the present invention takes a hybrid vehicle with a P2 structure as an example. The second operating condition parameter under the P2 architecture may include at least one of the second clutch shaft speed, motor speed, motor torque, the first clutch torque, the engine speed, and the transmission shaft speed. The startup process can be divided into a slip establishment phase, which refers to the process of establishing the difference between the motor speed and the clutch shaft speed to form a clutch sliding film state. In this phase, a slip is established between the motor speed and the clutch shaft speed; a drag phase, in which the motor and the first clutch are used to drag the engine to speed up; and a speed synchronization phase, in which the engine speed is increased and the motor speed is synchronized with the transmission shaft speed. Those skilled in the art can select different second operating condition parameters according to needs and divide the startup process. The embodiment of the present invention does not impose specific restrictions on this. Specifically, it can be referred to step 201.

[0093] Optionally, step 202 includes:

[0094] Step S21, in the startup process, the second clutch shaft speed is reduced, and the motor speed is increased to a preset compensation value between the motor speed and the second clutch shaft speed, and the stage of establishing slip is divided into the slip establishment stage for a preset time period.

[0095] In the embodiment of the present invention, the P2 architecture hybrid vehicle adopts sliding film start, and the sliding film state is established through slip. Optionally, the HCU can request the second clutch to enter the sliding state, and the TCU (Transmission Control Unit) responds to the request to control the second clutch to reduce the torque, thereby reducing the shaft speed of the second clutch. The HCU can also request to increase the motor torque to increase the motor speed, so that there is a difference between the motor speed and the clutch shaft speed. When the difference is greater than or equal to the preset compensation value, it is determined that the sliding stage is established, and the above stage can be divided into the slip establishment stage. Optionally, the preset compensation value can be 200r / min~250r / min, such as 200r / min, 210r / min, 230r / min, 240r / min, 250r / min, etc., and the embodiment of the present invention does not impose specific restrictions on this.

[0096] Step S22: In the startup process, the stage in which the motor torque and the first clutch torque are increased to drag and increase the engine speed to be greater than or equal to a second engine speed threshold is divided into the drag stage.

[0097] In the embodiment of the present invention, after the slip establishment stage, the motor and the first clutch can be controlled to increase the torque, that is, to increase the motor torque and the first clutch torque. Since the first clutch is located between the engine and the motor, the motor torque and the first clutch torque can be increased to increase the engine speed to a second engine speed threshold. The above stage can be divided into a drag stage. Optionally, the second engine speed threshold can be 500r / mimn, 550r / mimn, 500r / mimn, etc. The embodiment of the present invention does not impose any specific restrictions on this.

[0098] Step S23, in the startup process, after increasing the engine speed until the difference between the engine speed and the motor speed is less than a preset difference, increasing the first clutch torque to synchronize the engine speed with the motor speed, and then reducing the motor torque to synchronize the motor speed with the gearbox shaft speed is divided into the speed synchronization stage.

[0099] In the embodiment of the present invention, when the engine speed is increased to the second engine speed threshold value during the dragging stage, the engine can be requested to inject fuel and ignite, thereby triggering the ignition command. In response to the ignition command, the engine speed can be increased so that the difference between the engine speed and the motor speed is less than the preset difference. At this time, the first clutch torque can be increased to synchronize the engine and the motor, and the speed synchronization of the motor and the engine in the P2 architecture is completed. Then the motor torque is controlled to decrease so that the motor speed is synchronized with the transmission shaft speed. The speeds of various components can be synchronized at this stage, and the above stages can be divided into speed synchronization stages. Optionally, the preset difference can be 50r / min to 150r / min, such as 50r / min, 60r / min, 80r / min, 100r / min, 150r / min, etc., and the embodiment of the present invention does not impose specific restrictions on this.

[0100] Step 203: When the vehicle is in a shutdown process and a start command is triggered, obtain the real-time operating parameters of the vehicle.

[0101] Step 204: determining a target stop phase corresponding to the vehicle in at least two stop phases according to the real-time operating condition parameters, wherein the at least two stop phases are obtained according to changes in the operating condition parameters in the stop process.

[0102] In the embodiment of the present invention, steps 203 to 204 may correspond to the relevant descriptions of steps 101 to 102 described above, and will not be described again to avoid repetition.

[0103] Step 205: When the target shutdown stage is the engine torque reduction stage, determine that the vehicle completes the startup process.

[0104] In the embodiment of the present invention, it is mainly to determine how the target stop phase of the stop route corresponds to the target start phase of the start process. For example, in a P2 architecture hybrid vehicle, the target stop phase is the engine torque reduction phase, that is, when the vehicle is in the engine torque reduction phase in the stop process, the engine torque architecture is still in an activated state, the shutdown command is not triggered, the first clutch is in a closed state, and the engine speed is relatively high. At this time, when the start command is triggered, there is no need to continue to execute the stop process, request the motor to output torque to drag the engine, trigger the injection ignition command, etc. At this time, the status of each component inside the vehicle can be equivalent to the status after the start process is completed. Therefore, when the target stop phase is the engine torque reduction phase, the stop process can be directly reset, and it is determined that the vehicle has completed the start process.

[0105] Step 206: When the target shutdown phase is the clutch torque reduction phase, determine the speed synchronization phase as the target startup phase.

[0106] In an embodiment of the present invention, when the target shutdown stage is the clutch torque reduction stage, the engine torque reduction stage has ended. At this time, the engine torque reduction is completed, the first clutch is opening, the torque structure is in an activated state, and the shutdown command has not been triggered. According to the status of various components inside the vehicle, it can be adjusted to the speed synchronization stage of the starting process. There is no need to go through the dragging stage to start the vehicle, which effectively reduces the energy consumption required for starting the vehicle.

[0107] Optionally, the real-time operating parameters include real-time engine speed.

[0108] Step 207: When the target shutdown phase is the engine speed reduction phase, determine the target startup phase in at least two startup phases according to the real-time engine speed.

[0109] In an embodiment of the present invention, when the target start-up phase is the engine deceleration phase, it is necessary to further determine the corresponding target start-up phase based on the real-time engine speed. When the real-time engine speed is high, the engine can activate the torque structure by fuel injection ignition without motor drag.

[0110] Optionally, step 207 includes:

[0111] Step S31: when the real-time engine speed is greater than or equal to a third engine speed threshold and the torque architecture of the vehicle is in an activated state, determine that the speed synchronization phase is the target start-up phase, and the torque architecture is used to distribute torque according to operating condition parameters.

[0112] In an embodiment of the present invention, the third engine speed threshold is the minimum speed at which the engine can activate the torque architecture through its own fuel injection ignition, wherein the torque architecture is used to distribute torque according to operating parameters. When the real-time engine speed is greater than or equal to the third engine speed threshold and the vehicle's torque architecture is in an activated state, there is no need to request the motor output torque to drag the engine to speed up, but only needs to request to increase the first clutch torque to complete speed synchronization, so that the speed synchronization stage can be determined as the target starting stage.

[0113] In the embodiment of the present invention, since there may be CAN delay (Controller Area Network delay) in the internal communication of the vehicle, it is possible that the HCU sends a shutdown command of one unit and receives a signal that the torque structure of the engine is in an activated state at the same time, but the ECM (Engine Control Module) responds to the shutdown command to control the torque structure to be converted to an inactivated state, and the HCU determines that the torque structure is in an activated state according to the signal logic of the activated state, and no longer initiates the ignition command, thereby causing a pseudo-start phenomenon in which the engine is actually turned off. Optionally, when the start command is triggered in the shutdown process, the torque structure state signal of several cycles can be received first. After a preset number of judgments or a preset judgment time, if the state signal is still an activated state signal, it is determined that the torque structure is in an activated state. Otherwise, it is determined that the torque structure is in an inactivated state, thereby avoiding the pseudo-start phenomenon in which the engine is actually turned off.

[0114] Step S32: When the real-time engine speed is greater than or equal to the third engine speed threshold and the torque architecture is in an inactive state, determining that the drag phase is the target startup phase.

[0115] In an embodiment of the present invention, when the real-time engine speed is greater than or equal to the third engine speed threshold and the torque architecture is in an inactivated state, it is necessary to trigger an ignition command to activate the torque architecture by engine fuel injection ignition. At this time, it is necessary to request the motor and the first clutch to output a drag torque to drag the engine to speed up, that is, the drag phase can be determined as the target start phase.

[0116] Step S33: When the real-time engine speed is less than the third engine speed threshold, determine the slip establishment phase as the target startup phase.

[0117] In the embodiment of the present invention, when the real-time engine speed is less than the third engine speed threshold, it can be considered that the vehicle has completed the shutdown process, and therefore, the startup process can be executed from the slip establishment stage.

[0118] Optionally, the step S33 specifically includes:

[0119] When the real-time engine speed is less than the third engine speed threshold and the real-time engine speed is greater than the resonance speed, the slip establishment phase is determined to be the target starting phase, and the resonance speed is the engine speed that causes the dual mass flywheel of the engine to resonate.

[0120] In the embodiment of the present invention, the dual-mass flywheel is used to isolate the torsional vibration of the engine crankshaft, thereby improving the performance of the vehicle. When the engine is at a resonant speed, i.e., an engine speed that causes the dual-mass flywheel of the engine to resonate, the starting process may damage the hardware structure of the engine. Therefore, the engine speed needs to be greater than the resonant speed to protect the hardware structure of the engine. Optionally, the scheme of the present application may be restricted from being executed when the engine speed is at the resonant speed, or the starting process may not enter the dragging stage when the engine speed is at the resonant speed. Optionally, the resonant speed may be 220r / min to 480r / min, such as 220r / min, 250r / min, 280r / min, 300r / min, 350r / min, 400r / min, 450r / min, 480r / min, etc. The embodiment of the present invention does not impose specific restrictions on this.

[0121] Step 208: In response to the start command, control the vehicle to execute a start process from the target start phase.

[0122] In the embodiment of the present invention, step 208 may correspond to the relevant description of the aforementioned step 104, and will not be described again here to avoid repetition.

[0123] In an embodiment of the present invention, different shutdown stages are divided according to changes in operating condition parameters in the shutdown process, and different startup stages are divided according to changes in operating condition parameters in the startup process. When the vehicle is in the shutdown process and a startup command is triggered, the real-time operating condition parameters of the vehicle are obtained, and the target shutdown stage corresponding to the vehicle in at least two shutdown stages is determined according to the real-time operating condition parameters. At this time, in response to the startup command, the vehicle can be controlled to enter the target startup stage corresponding to the operating condition parameters of the target shutdown stage in the startup stage to execute the startup process. When the startup command is triggered in the shutdown process, the embodiment of the present invention does not need to wait for the shutdown process to be completed and then start the startup process from the beginning, but directly enters the target startup stage corresponding to the operating condition parameters from the target shutdown stage, which reduces the time consumption of responding to the startup command, improves the response efficiency, and reduces the delay. At the same time, there is no need to fully execute the shutdown and startup processes, which reduces the energy consumption of the vehicle.

[0124] Figure 3 is a structural block diagram of a vehicle starting device 30 provided in an embodiment of the present invention, such as Figure 3 As shown, the device may include:

[0125] A real-time operating condition parameter acquisition module 301, when the vehicle is in a shutdown process and a start command is triggered, acquires the real-time operating condition parameters of the vehicle;

[0126] A target stop phase determination module 302 is used to determine a target stop phase corresponding to the vehicle in at least two stop phases according to the real-time operating condition parameters, wherein the at least two stop phases are obtained according to changes in the operating condition parameters in the stop process;

[0127] A target startup phase determination module 303 is used to determine a target startup phase having the operating condition parameters corresponding to the target shutdown phase in at least two startup phases, wherein the at least two startup phases are obtained according to the changes of the operating condition parameters in the startup process;

[0128] The start-up process execution module 304 is used to control the vehicle to execute the start-up process from the target start-up phase in response to the start-up instruction.

[0129] Optionally, the device further comprises:

[0130] a shutdown phase division module, configured to divide the phases into an engine torque reduction phase, a clutch torque reduction phase and an engine speed reduction phase according to the change of a first operating condition parameter in the shutdown process, wherein the first operating condition parameter includes at least one of an engine torque, a motor negative torque, a first clutch torque and an engine speed, and the first clutch is located between the motor and the engine;

[0131] A starting phase division module is used to divide the phases according to the change of the second operating condition parameter in the starting process to obtain a slip establishment phase, a drag phase and a speed synchronization phase, wherein the second clutch is located between the motor and the gearbox, and the second operating condition parameter includes at least one of the second clutch shaft speed, the motor speed, the motor torque, the first clutch torque, the engine speed, and the gearbox shaft speed.

[0132] Optionally, the shutdown stage division module includes:

[0133] An engine torque reduction submodule, used for dividing the stage in which the engine torque is reduced to less than a first torque threshold and the motor negative torque is increased to a second torque threshold into the engine torque reduction stage during the shutdown process;

[0134] A clutch torque reduction submodule, used for dividing the stage in which the first clutch torque is reduced to less than a third torque threshold into the clutch torque reduction stage in the shutdown process;

[0135] The engine speed reduction submodule is used to divide the stage in which the engine speed is reduced to less than a first engine speed threshold into the engine speed reduction stage during the shutdown process.

[0136] Optionally, the startup partitioning module includes:

[0137] A slip establishment submodule, used for reducing the shaft speed of the second clutch and increasing the motor speed to a preset compensation value between the motor speed and the shaft speed of the second clutch during the startup process, and dividing the stage of establishing slip into the slip establishment stage for a preset period of time;

[0138] a dragging submodule, for dividing, in a starting process, a stage in which the motor torque and the first clutch torque are increased to drag and increase the engine speed to be greater than or equal to a second engine speed threshold into the dragging stage;

[0139] The speed synchronization submodule is used to increase the engine speed until the difference between the engine speed and the motor speed is less than a preset difference, increase the first clutch torque to synchronize the engine speed with the motor speed, and then reduce the motor torque to synchronize the motor speed with the gearbox shaft speed during the startup process, and divide the stage into the speed synchronization stage.

[0140] The real-time operating condition parameter at least includes the real-time engine speed. The target startup phase determination module 303 includes:

[0141] A first target startup phase determination submodule, configured to determine that the vehicle completes the startup process when the target shutdown phase is the engine torque reduction phase;

[0142] A second target startup phase determination submodule, configured to determine the speed synchronization phase as a target startup phase when the target shutdown phase is the clutch torque reduction phase;

[0143] The third target startup phase determination submodule is configured to determine the target startup phase in at least two startup phases according to the real-time engine speed when the target shutdown phase is the engine speed reduction phase.

[0144] The third target startup phase determination submodule includes:

[0145] a first target startup phase determination unit, configured to determine that the speed synchronization phase is the target startup phase when the real-time engine speed is greater than or equal to a third engine speed threshold and a torque architecture of the vehicle is in an activated state, the torque architecture being used to distribute torque according to operating condition parameters;

[0146] a second target startup phase determination unit, configured to determine that the drag phase is the target startup phase when the real-time engine speed is greater than or equal to the third engine speed threshold and the torque architecture is in an inactive state;

[0147] The third target startup phase determining unit is configured to determine, when the real-time engine speed is less than the third engine speed threshold, that the slip establishment phase is the target startup phase.

[0148] Optionally, the third target starting phase determination unit is specifically used to determine that the slip establishment phase is the target starting phase when the real-time engine speed is less than the third engine speed threshold and the real-time engine speed is greater than the resonant speed, and the resonant speed is the engine speed that causes the dual mass flywheel resonance of the engine.

[0149] In an embodiment of the present invention, different shutdown stages are divided according to changes in operating condition parameters in the shutdown process, and different startup stages are divided according to changes in operating condition parameters in the startup process. When the vehicle is in the shutdown process and a startup command is triggered, the real-time operating condition parameters of the vehicle are obtained, and the target shutdown stage corresponding to the vehicle in at least two shutdown stages is determined according to the real-time operating condition parameters. At this time, in response to the startup command, the vehicle can be controlled to enter the target startup stage corresponding to the operating condition parameters of the target shutdown stage in the startup stage to execute the startup process. When the startup command is triggered in the shutdown process, the embodiment of the present invention does not need to wait for the shutdown process to be completed and then start the startup process from the beginning, but directly enters the target startup stage corresponding to the operating condition parameters from the target shutdown stage, which reduces the time consumption of responding to the startup command, improves the response efficiency, and reduces the delay. At the same time, there is no need to fully execute the shutdown and startup processes, which reduces the energy consumption of the vehicle.

[0150] The embodiment of the present invention also provides a vehicle for realizing Figure 1 to Figure 2 The vehicle starting method, or carrying Figure 3 The vehicle starting device.

[0151] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle starting method, characterized in that: The method comprises: When the vehicle is in a shutdown process and a start command is triggered, obtaining real-time operating parameters of the vehicle; Determining a target stop phase corresponding to the vehicle in at least two stop phases according to the real-time operating condition parameters, wherein the at least two stop phases are obtained by dividing according to changes in the operating condition parameters in the stop process; Determine a target startup phase having the operating condition parameters corresponding to the target shutdown phase in at least two startup phases, wherein the at least two startup phases are obtained by dividing according to changes in the operating condition parameters in the startup process; In response to the start command, controlling the vehicle to execute a start process from the target start phase; According to the change of the first working condition parameter in the shutdown process, the engine torque reduction stage, the clutch torque reduction stage and the engine speed reduction stage are obtained by stage division, including: In the shutdown process, the stage in which the engine torque is reduced to less than the first torque threshold and the motor negative torque is increased to the second torque threshold is divided into the engine torque reduction stage; In the shutdown process, the stage in which the first clutch torque is reduced to less than the third torque threshold is divided into the clutch torque reduction stage; In the shutdown process, the stage in which the engine speed is reduced to less than the first engine speed threshold is divided into the engine speed reduction stage; According to the change of the second operating condition parameter in the startup process, the phases are divided into slip establishment phase, drag phase and speed synchronization phase, including: In the startup process, the second clutch shaft speed is reduced, and the motor speed is increased until the motor speed differs from the second clutch shaft speed by a preset compensation value, and the stage of establishing slip is divided into the slip establishment stage for a preset time period; In the starting process, the stage of increasing the motor torque and the first clutch torque to increase the engine speed to be greater than or equal to the second engine speed threshold by dragging is divided into the dragging stage; In the starting process, after the engine speed is increased until the difference between the engine speed and the motor speed is less than a preset difference, the first clutch torque is increased to synchronize the engine speed with the motor speed, and then the motor torque is reduced to synchronize the motor speed with the gearbox shaft speed, which is divided into the speed synchronization stage; The real-time operating condition parameter includes at least a real-time engine speed, and the determining of a target starting phase having the operating condition parameter corresponding to the target shutdown phase in at least two starting phases includes: When the target shutdown phase is the engine torque reduction phase, determining that the vehicle completes the startup process; When the target shutdown phase is the clutch torque reduction phase, determining the speed synchronization phase as the target startup phase; In a case where the target shutdown phase is the engine speed reduction phase, determining the target startup phase in at least two startup phases according to the real-time engine speed; When the target shutdown stage is the engine speed reduction stage, determining the target startup stage in at least two startup stages according to the real-time engine speed includes: When the real-time engine speed is greater than or equal to a third engine speed threshold and a torque architecture of the vehicle is in an activated state, determining the speed synchronization phase as the target startup phase, the torque architecture being used to distribute torque according to operating condition parameters; When the real-time engine speed is greater than or equal to the third engine speed threshold and the torque architecture is in an inactive state, determining the drag phase as the target startup phase; When the real-time engine speed is less than the third engine speed threshold, the slip establishment phase is determined as the target starting phase.

2. The method according to claim 1, characterized in that When the vehicle is in the shutdown process and a start command is triggered, before obtaining the real-time operating condition parameters of the vehicle, the method further includes: The engine torque reduction stage, the clutch torque reduction stage and the engine speed reduction stage are obtained by performing stage division according to the change of the first operating condition parameter in the shutdown process, wherein the first operating condition parameter includes at least one of the engine torque, the motor negative torque, the first clutch torque and the engine speed, and the first clutch is located between the motor and the engine; The slip establishment phase, the drag phase and the speed synchronization phase are obtained by dividing the phases according to the change of the second operating condition parameter in the startup process. The second clutch is located between the motor and the gearbox. The second operating condition parameter includes at least one of the second clutch shaft speed, the motor speed, the motor torque, the first clutch torque, the engine speed and the gearbox shaft speed.

3. The method according to claim 1, characterized in that When the real-time engine speed is less than the third engine speed threshold, determining the slip establishment phase as the target startup phase specifically includes: When the real-time engine speed is less than the third engine speed threshold and the real-time engine speed is greater than the resonance speed, the slip establishment phase is determined to be the target starting phase, and the resonance speed is the engine speed that causes the dual mass flywheel of the engine to resonate.

4. A vehicle starting device, characterized in that: The device comprises: A real-time operating condition parameter acquisition module, which acquires the real-time operating condition parameters of the vehicle when the vehicle is in a shutdown process and a start command is triggered; a target stop phase determination module, configured to determine a target stop phase corresponding to the vehicle in at least two stop phases according to the real-time operating condition parameters, wherein the at least two stop phases are obtained by dividing according to changes in the operating condition parameters in the stop process; A target startup phase determination module, used to determine a target startup phase having the operating condition parameters corresponding to the target shutdown phase in at least two startup phases, wherein the at least two startup phases are obtained by dividing according to changes in the operating condition parameters in the startup process; a start-up process execution module, configured to control the vehicle to execute a start-up process from the target start-up phase in response to the start-up instruction; According to the change of the first working condition parameter in the shutdown process, the engine torque reduction stage, the clutch torque reduction stage and the engine speed reduction stage are obtained by stage division, including: In the shutdown process, the stage in which the engine torque is reduced to less than the first torque threshold and the motor negative torque is increased to the second torque threshold is divided into the engine torque reduction stage; In the shutdown process, the stage in which the first clutch torque is reduced to less than the third torque threshold is divided into the clutch torque reduction stage; In the shutdown process, the stage in which the engine speed is reduced to less than the first engine speed threshold is divided into the engine speed reduction stage; According to the change of the second operating condition parameter in the startup process, the phases are divided into slip establishment phase, drag phase and speed synchronization phase, including: In the startup process, the second clutch shaft speed is reduced, and the motor speed is increased until the motor speed differs from the second clutch shaft speed by a preset compensation value, and the stage of establishing slip is divided into the slip establishment stage for a preset time period; In the starting process, the stage of increasing the motor torque and the first clutch torque to increase the engine speed to be greater than or equal to the second engine speed threshold by dragging is divided into the dragging stage; In the starting process, after the engine speed is increased until the difference between the engine speed and the motor speed is less than a preset difference, the first clutch torque is increased to synchronize the engine speed with the motor speed, and then the motor torque is reduced to synchronize the motor speed with the gearbox shaft speed, which is divided into the speed synchronization stage; The real-time operating condition parameter includes at least a real-time engine speed, and the determining of a target starting phase having the operating condition parameter corresponding to the target shutdown phase in at least two starting phases includes: When the target shutdown phase is the engine torque reduction phase, determining that the vehicle completes the startup process; When the target shutdown phase is the clutch torque reduction phase, determining the speed synchronization phase as the target startup phase; In a case where the target shutdown phase is the engine speed reduction phase, determining the target startup phase in at least two startup phases according to the real-time engine speed; When the target shutdown stage is the engine speed reduction stage, determining the target startup stage in at least two startup stages according to the real-time engine speed includes: When the real-time engine speed is greater than or equal to a third engine speed threshold and a torque architecture of the vehicle is in an activated state, determining the speed synchronization phase as the target startup phase, the torque architecture being used to distribute torque according to operating condition parameters; When the real-time engine speed is greater than or equal to the third engine speed threshold and the torque architecture is in an inactive state, determining the drag phase as the target startup phase; When the real-time engine speed is less than the third engine speed threshold, the slip establishment phase is determined as the target starting phase.

5. The device according to claim 4, characterized in that The device also includes: a shutdown phase division module, configured to divide the phases into an engine torque reduction phase, a clutch torque reduction phase and an engine speed reduction phase according to the change of a first operating condition parameter in the shutdown process, wherein the first operating condition parameter includes at least one of an engine torque, a motor negative torque, a first clutch torque and an engine speed, and the first clutch is located between the motor and the engine; A starting phase division module is used to divide the phases according to the change of the second operating condition parameter in the starting process to obtain a slip establishment phase, a drag phase and a speed synchronization phase, wherein the second clutch is located between the motor and the gearbox, and the second operating condition parameter includes at least one of the second clutch shaft speed, the motor speed, the motor torque, the first clutch torque, the engine speed, and the gearbox shaft speed.

6. A vehicle, characterized in that: The vehicle is used to implement the vehicle starting method described in claims 1 to 3.

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