A regeneration control method and device for a hybrid vehicle, a hybrid vehicle and a medium

Abstract

The present invention discloses a regeneration control method, device, hybrid vehicle and medium for a hybrid vehicle. The regeneration control method for a hybrid vehicle includes: when the vehicle enters a driving regeneration control mode, obtaining the real-time engine speed and the real-time engine torque; obtaining a regeneration torque correction value according to the real-time engine speed and the real-time engine torque; obtaining the real-time engine exhaust temperature; obtaining an exhaust temperature correction coefficient according to the real-time engine exhaust temperature; obtaining the engine torque under the regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient; completing driving regeneration according to the engine torque under the driving regeneration control mode, and by correcting the engine torque, increasing the engine exhaust temperature, improving the regeneration efficiency, and ensuring the regeneration effect under low-load conditions.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a regeneration control method and device for a hybrid vehicle, a hybrid vehicle and a medium. Background Art

[0002] In order to meet the increasingly stringent emission standards, National VI engines are currently equipped with DPF (Diesel Particulate Filter) to capture soot particles in the exhaust. DPF is a ceramic filter installed in the diesel engine emission system, which captures particulate emissions in the exhaust gas before they enter the atmosphere. As the operating time and mileage of the DPF particle trap increase, a large amount of particles accumulate and clog the DPF, causing an increase in exhaust back pressure, leading to deterioration of engine power performance and economic performance. Therefore, the DPF must remove the attached particles in a timely manner, which is the regeneration of the DPF.

[0003] However, due to the long regeneration time of traditional diesel engines and the insufficient exhaust temperature, the engines frequently enter and exit the regeneration mode, and the regeneration is not thorough. The carbon load accumulates and causes the vehicle to report a fault. Summary of the invention

[0004] The present invention provides a regeneration control method and device for a hybrid vehicle, a hybrid vehicle and a medium, so as to increase the exhaust temperature of the engine and ensure the regeneration effect.

[0005] According to one aspect of the present invention, a regeneration control method for a hybrid vehicle is provided, comprising:

[0006] When the vehicle enters the driving regeneration control mode, the real-time engine speed and real-time engine torque are obtained;

[0007] Acquire a regenerative torque correction value according to the real-time engine speed and the real-time engine torque;

[0008] Get the real-time exhaust temperature of the engine;

[0009] Obtaining an exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine;

[0010] Acquire the engine torque in the driving regeneration control mode according to the engine real-time torque, the regeneration torque correction value and the exhaust temperature correction coefficient;

[0011] The driving regeneration is completed according to the engine torque in the driving regeneration control mode.

[0012] Optionally, obtaining the regenerative torque correction value according to the real-time engine speed and the real-time engine torque includes:

[0013] Obtaining a regenerative torque correction table, wherein the regenerative torque correction table represents a mapping relationship between a preset engine speed and a preset engine torque to obtain a target regenerative torque correction value;

[0014] A regenerative torque correction value is obtained according to the engine real-time speed, the engine real-time torque and the regenerative torque correction table.

[0015] Optionally, obtaining an exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine includes:

[0016] Acquire a first preset corresponding relationship, wherein the first preset corresponding relationship represents a corresponding relationship between an engine exhaust temperature and an exhaust temperature correction coefficient;

[0017] An exhaust temperature correction coefficient is obtained according to the real-time exhaust temperature of the engine and the first preset corresponding relationship.

[0018] Optionally, obtaining the engine torque in the driving regeneration control mode according to the engine real-time torque, the regeneration torque correction value and the exhaust temperature correction coefficient includes:

[0019] Obtaining a regeneration correction torque according to the regeneration torque correction value and the exhaust temperature correction coefficient;

[0020] The engine torque in the driving regeneration control mode is obtained according to the regeneration correction torque and the engine real-time torque.

[0021] Optionally, before the vehicle enters the driving regeneration control mode, it also includes:

[0022] Get the engine operating mode;

[0023] Get the power battery SOC value;

[0024] It is determined according to the engine operation mode and the power battery SOC value whether the vehicle enters a driving regeneration control mode or a parking regeneration control mode.

[0025] Optionally, determining that the vehicle enters a driving regeneration control mode or a parking regeneration control mode according to the engine operation mode and the power battery SOC value includes:

[0026] When the vehicle enters the parking regeneration control mode, the vehicle operation status information is obtained, wherein the vehicle operation status information includes engine speed, vehicle speed, vehicle gear status, ECU power-on status and clutch status;

[0027] determining the engine required torque according to the vehicle operating state information;

[0028] Parking charging regeneration is completed according to the engine demand torque.

[0029] According to another aspect of the present invention, a regeneration control device for a hybrid vehicle is provided, and the regeneration control device for a hybrid vehicle executes a regeneration control method for a hybrid vehicle according to any one of the above aspects, and the regeneration control device for a hybrid vehicle comprises:

[0030] The engine real-time speed and engine real-time torque acquisition module is used to obtain the engine real-time speed and engine real-time torque when the vehicle enters the driving regeneration control mode;

[0031] A regenerative torque correction value acquisition module, used for acquiring a regenerative torque correction value according to the real-time engine speed and the real-time engine torque;

[0032] The engine real-time exhaust temperature acquisition module is used to obtain the engine real-time exhaust temperature;

[0033] An exhaust temperature correction coefficient acquisition module is used to acquire the exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine;

[0034] The engine torque acquisition module in the driving regeneration control mode is used to acquire the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient;

[0035] The driving regeneration completion module is used to complete the driving regeneration according to the engine torque in the driving regeneration control mode.

[0036] According to another aspect of the present invention, a hybrid vehicle is provided, the hybrid vehicle comprising: an engine, a motor, a power battery, a post-processing system and a controller, the controller being connected to the engine, the motor, the power battery and the post-processing system respectively;

[0037] The controller is used to execute the regeneration control method for a hybrid vehicle according to any one of the above aspects.

[0038] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to implement the regeneration control method for a hybrid vehicle described in any one of the above aspects when executed by a processor.

[0039] The technical solution of the embodiment of the present invention provides a regeneration control method for a hybrid vehicle, including: when the vehicle enters a driving regeneration control mode, obtaining the real-time engine speed and the real-time engine torque; obtaining a regeneration torque correction value according to the real-time engine speed and the real-time engine torque; obtaining the real-time engine exhaust temperature; obtaining an exhaust temperature correction coefficient according to the real-time engine exhaust temperature; obtaining the engine torque under the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient; completing driving regeneration according to the engine torque under the driving regeneration control mode, and under low load conditions, correcting the engine torque, increasing the engine exhaust temperature, improving the regeneration efficiency, and ensuring the regeneration effect.

[0040] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A flow chart of a regeneration control method for a hybrid vehicle provided by an embodiment of the present invention;

[0043] Figure 2 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention;

[0044] Figure 3 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention;

[0045] Figure 4 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention;

[0046] Figure 5 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention;

[0047] Figure 6 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention;

[0048] Figure 7 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention;

[0049] Figure 8 A schematic structural diagram of a regeneration control device for a hybrid vehicle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0052] Figure 1 A flow chart of a regeneration control method for a hybrid vehicle provided in an embodiment of the present invention. This embodiment is applicable to the regeneration control of a hybrid vehicle. The method can be executed by a regeneration control device of a hybrid vehicle. The regeneration control device of the hybrid vehicle can be implemented in the form of hardware and / or software. The regeneration control device of the hybrid vehicle can be configured in a hybrid vehicle. A hybrid vehicle includes an engine, a motor, a power battery, a post-processing system and a controller. The engine is connected to the motor. The engine can drive the motor to work. At the same time, both can drive the vehicle. The motor can generate electricity and can also drive. The post-processing system includes a particulate filter. The hybrid vehicle can include a fuel drive mode, an electric drive mode and a fuel and electric hybrid drive mode. The controller can be an ECU (Electronic Control Unit), also known as a "driving computer" or "on-board computer". The controller is connected to the engine, the motor and the power battery respectively. The controller can obtain parameters such as the carbon load of the engine, the speed of the engine, the torque of the engine, the exhaust temperature of the engine, the charge SOC value of the power battery, the working speed of the motor, etc. The controller is used to execute any of the regeneration control methods for hybrid vehicles described below. Figure 1 As shown, the method includes:

[0053] S101, when the vehicle enters the driving regeneration control mode, the real-time engine speed and the real-time engine torque are obtained.

[0054] Among them, when the vehicle enters the driving regeneration control mode, but when the engine is in a low-load condition, the exhaust temperature of the engine is low, which will seriously affect the driving regeneration effect. Therefore, it is necessary to use the real-time engine speed and the real-time engine torque to obtain the required engine torque during the driving regeneration process, increase the engine load, and then speed up the regeneration efficiency. At the same time, it can also reduce the amount of post-injection and achieve a fuel-saving effect.

[0055] S102: Obtain a regenerative torque correction value according to the real-time engine speed and the real-time engine torque.

[0056] Among them, the engine real-time speed is the engine speed when running driving regeneration, and the engine real-time torque is the engine torque after torque distribution based on the non-driving regeneration control mode. It is necessary to obtain the regeneration torque correction value based on the engine real-time speed and the engine real-time torque, so that the lower the load, the greater the regeneration torque correction value obtained, which is beneficial to increase the engine load, and then increase the engine exhaust temperature to ensure the regeneration effect.

[0057] S103, obtaining the real-time exhaust temperature of the engine.

[0058] S104, obtaining an exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine.

[0059] Among them, when the real-time exhaust temperature of the engine is low, it is necessary to obtain a larger exhaust temperature correction coefficient, thereby obtaining an engine torque with a higher correction amount, thereby increasing the exhaust temperature of the engine.

[0060] S105: Obtain the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient.

[0061] Among them, the engine real-time torque, regeneration torque correction value and exhaust temperature correction coefficient are used to calculate the engine torque in the driving regeneration control mode with a larger torque value, so that the exhaust temperature of the engine is higher, the regeneration rate is accelerated, and the regeneration time is shortened. At the same time, the engine torque in the driving regeneration control mode increases the engine load, lowers the fuel consumption rate, and reduces the post-injection amount, which can achieve a fuel-saving effect.

[0062] S106, completing driving regeneration according to the engine torque in the driving regeneration control mode.

[0063] The embodiment of the present invention obtains the real-time engine speed and the real-time engine torque, and then regenerates the torque correction value; obtains the real-time engine exhaust temperature; obtains the exhaust temperature correction coefficient according to the real-time engine exhaust temperature; obtains the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient; completes the driving regeneration according to the engine torque in the driving regeneration control mode, so that when the engine driving regeneration mode is in a low-load condition, the engine torque is corrected, the engine exhaust temperature is increased, the regeneration efficiency is improved, and the regeneration effect is guaranteed.

[0064] Optional, Figure 2 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention, such as Figure 2 As shown, the method includes:

[0065] S201, when the vehicle enters the driving regeneration control mode, the real-time engine speed and the real-time engine torque are obtained.

[0066] S202, obtaining a regenerative torque correction table, where the regenerative torque correction table represents a mapping relationship between a preset engine speed and a preset engine torque to obtain a target regenerative torque correction value.

[0067] S203, obtaining a regenerative torque correction value according to the real-time engine speed, the real-time engine torque and the regenerative torque correction table.

[0068] Among them, during the engine development project, the control parameters of all engine working conditions are calibrated on the engine frame to find suitable parameters for each working point of the engine, that is, a relatively optimized regenerative torque correction table is formed among a large number of preset engine speeds, preset engine torques, and regenerative torque correction values, so that when the vehicle is regenerated, when the controller in the vehicle obtains the real-time engine speed and real-time engine torque, it can look up the table and calibrate to obtain the corresponding required regenerative torque correction value, so that under lower load conditions, the engine can have a larger regenerative torque correction value, thereby increasing the exhaust temperature of the engine to meet the regeneration needs of driving.

[0069] S204, obtaining the real-time exhaust temperature of the engine.

[0070] S205: Obtain an exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine.

[0071] S206, obtaining the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient.

[0072] S207, completing driving regeneration according to the engine torque in the driving regeneration control mode.

[0073] The embodiment of the present invention obtains the real-time engine speed and the real-time engine torque, obtains the regeneration torque correction value according to the real-time engine speed, the real-time engine torque and the regeneration torque correction table; obtains the real-time engine exhaust temperature; obtains the exhaust temperature correction coefficient according to the real-time engine exhaust temperature; obtains the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient; completes the driving regeneration according to the engine torque in the driving regeneration control mode, so that when the engine driving regeneration mode is in a low-load condition, the engine torque is corrected, the engine exhaust temperature is increased, the regeneration efficiency is improved, and the regeneration effect is guaranteed.

[0074] Optional, Figure 3 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention, such as Figure 3 As shown, the method includes:

[0075] S301, when the vehicle enters the driving regeneration control mode, the real-time engine speed and the real-time engine torque are obtained.

[0076] S302, obtaining a regenerative torque correction table, where the regenerative torque correction table represents a mapping relationship between a preset engine speed and a preset engine torque to obtain a target regenerative torque correction value.

[0077] S303, obtaining a regenerative torque correction value according to the real-time engine speed, the real-time engine torque and the regenerative torque correction table.

[0078] S304, obtaining the real-time exhaust temperature of the engine.

[0079] S305: Obtain a first preset corresponding relationship, where the first preset corresponding relationship represents a corresponding relationship between the engine exhaust temperature and the exhaust temperature correction coefficient.

[0080] S306: Obtain an exhaust temperature correction coefficient based on the real-time exhaust temperature of the engine and a first preset corresponding relationship.

[0081] Among them, the correspondence between multiple engine exhaust temperatures and exhaust temperature correction coefficients is set in advance to obtain a first preset correspondence, and the first preset correspondence is a two-dimensional curve. According to a corresponding engine exhaust temperature, there is an exhaust temperature correction coefficient. When the real-time exhaust temperature of the engine is known, the corresponding exhaust temperature correction coefficient can be obtained according to the first preset correspondence, which reduces the calculation difficulty and shortens the regeneration time. At the same time, when the real-time exhaust temperature of the engine is low, a larger exhaust temperature correction coefficient can be obtained to increase the exhaust temperature of the engine and meet the effect of driving regeneration.

[0082] S307, obtaining the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient.

[0083] S308, completing driving regeneration according to the engine torque in the driving regeneration control mode.

[0084] The embodiment of the present invention obtains the real-time engine speed and the real-time engine torque, obtains the regeneration torque correction value according to the real-time engine speed, the real-time engine torque and the regeneration torque correction table; obtains the real-time engine exhaust temperature; obtains the exhaust temperature correction coefficient according to the real-time engine exhaust temperature and the first preset corresponding relationship; obtains the engine torque under the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient; completes the driving regeneration according to the engine torque under the driving regeneration control mode, so that when the engine driving regeneration mode is in a low-load condition, the engine torque is corrected, the engine exhaust temperature is increased, the regeneration efficiency is improved, and the regeneration effect is guaranteed.

[0085] Optional, Figure 4 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention, Figure 5 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention, such as Figure 4 and Figure 5 As shown, the method includes:

[0086] S401, when the vehicle enters the driving regeneration control mode, the real-time engine speed and the real-time engine torque are obtained.

[0087] S402, obtaining a regenerative torque correction table, where the regenerative torque correction table represents a mapping relationship between a preset engine speed and a preset engine torque to obtain a target regenerative torque correction value.

[0088] S403, obtaining a regenerative torque correction value according to the real-time engine speed, the real-time engine torque and the regenerative torque correction table.

[0089] S404, obtaining the real-time exhaust temperature of the engine.

[0090] S405: Obtain a first preset corresponding relationship, where the first preset corresponding relationship represents a corresponding relationship between the engine exhaust temperature and the exhaust temperature correction coefficient.

[0091] S406: Obtain an exhaust temperature correction coefficient based on the real-time exhaust temperature of the engine and a first preset corresponding relationship.

[0092] S407, obtaining the regeneration correction torque according to the regeneration torque correction value and the exhaust temperature correction coefficient.

[0093] The regeneration correction torque is obtained by multiplying the obtained regeneration torque correction value and the exhaust temperature correction coefficient, and then the engine torque is increased with the help of the regeneration correction torque, the engine load is increased, and the driving regeneration effect is ensured.

[0094] S408: Obtain the engine torque in the driving regeneration control mode according to the regeneration correction torque and the engine real-time torque.

[0095] Among them, the regeneration correction torque and the engine real-time torque are added, and the regeneration correction torque is added on the basis of the engine real-time torque to obtain the engine torque under the driving regeneration control mode, and the engine load under the regeneration control mode is increased, so that the exhaust temperature during the regeneration process is increased, the combustion effect of carbon particles is ensured, the regeneration efficiency is improved, and the post-injection amount is reduced to achieve a fuel-saving effect.

[0096] S409: completing driving regeneration according to the engine torque in the driving regeneration control mode.

[0097] The embodiment of the present invention obtains the real-time engine speed and the real-time engine torque, obtains the regeneration torque correction value according to the real-time engine speed, the real-time engine torque and the regeneration torque correction table; obtains the real-time engine exhaust temperature; obtains the exhaust temperature correction coefficient according to the real-time engine exhaust temperature and the first preset corresponding relationship; obtains the regeneration correction torque according to the regeneration torque correction value and the exhaust temperature correction coefficient; obtains the engine torque in the driving regeneration control mode according to the regeneration correction torque and the real-time engine torque, and completes the driving regeneration according to the engine torque in the driving regeneration control mode, so that when the engine driving regeneration mode is in a low-load condition, the engine torque is corrected, the engine exhaust temperature is increased, the regeneration efficiency is improved, and the regeneration effect is guaranteed.

[0098] Optional, Figure 6 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention, such as Figure 6 As shown, the method includes:

[0099] S501, obtaining the engine operation mode.

[0100] The engine operation mode may include a non-regeneration mode and a regeneration mode, and the non-regeneration mode may include a heating mode.

[0101] S502, obtaining the power battery SOC value.

[0102] Among them, the current SOC value of the power battery is obtained to ensure that when the vehicle is regenerating, there is enough space in the power battery to store the electricity generated by the motor during the regeneration process to avoid power waste.

[0103] S503: Determine whether the vehicle enters a driving regeneration control mode or a parking regeneration control mode according to the engine operation mode and the power battery SOC value.

[0104] Among them, when the carbon load in the particulate filter of the vehicle accumulates too much, the engine operation mode will switch to the regeneration mode. At the same time, it is necessary to obtain the power battery SOC value, and use the hydraulic control system to make a judgment to determine that the power battery SOC value is lower than the preset power battery SOC value to ensure that the remaining space in the power battery can meet the vehicle's driving regeneration, and then control the vehicle to enter the driving regeneration control mode or the vehicle to enter the parking regeneration control mode.

[0105] S504, when the vehicle enters the driving regeneration control mode, the real-time engine speed and the real-time engine torque are obtained.

[0106] S505: Obtain a regenerative torque correction table, where the regenerative torque correction table represents a mapping relationship between a preset engine speed and a preset engine torque to obtain a target regenerative torque correction value.

[0107] S506, obtaining a regenerative torque correction value according to the real-time engine speed, the real-time engine torque and the regenerative torque correction table.

[0108] S507, obtaining the real-time exhaust temperature of the engine.

[0109] S508: Obtain a first preset corresponding relationship, where the first preset corresponding relationship represents a corresponding relationship between the engine exhaust temperature and the exhaust temperature correction coefficient.

[0110] S509: Obtain an exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine and a first preset corresponding relationship.

[0111] S510, obtaining the regeneration correction torque according to the regeneration torque correction value and the exhaust temperature correction coefficient.

[0112] S511, obtaining the engine torque in the driving regeneration control mode according to the regeneration correction torque and the engine real-time torque.

[0113] S512: completing driving regeneration according to the engine torque in the driving regeneration control mode.

[0114] The embodiment of the present invention obtains the engine operation mode; obtains the power battery SOC value; determines whether the vehicle enters the driving regeneration control mode or the vehicle enters the parking regeneration control mode according to the engine operation mode and the power battery SOC value, and then performs the regeneration process according to different regeneration control modes, thereby improving the regeneration efficiency and ensuring the regeneration effect.

[0115] Optional, Figure 7 A flowchart of another hybrid vehicle regeneration control method provided by an embodiment of the present invention, such as Figure 7 As shown, the method includes:

[0116] S601, obtaining the engine operation mode.

[0117] S602, obtaining the power battery SOC value.

[0118] S603: Determine whether the vehicle enters a driving regeneration control mode or a parking regeneration control mode according to the engine operation mode and the power battery SOC value.

[0119] S604, when the vehicle enters the driving regeneration control mode, the real-time engine speed and the real-time engine torque are obtained.

[0120] S605, obtaining a regenerative torque correction table, where the regenerative torque correction table represents a mapping relationship between a preset engine speed and a preset engine torque to obtain a target regenerative torque correction value.

[0121] S606, obtaining a regenerative torque correction value according to the real-time engine speed, the real-time engine torque and the regenerative torque correction table.

[0122] S607, obtaining the real-time exhaust temperature of the engine.

[0123] S608, obtaining a first preset corresponding relationship, where the first preset corresponding relationship represents a corresponding relationship between the engine exhaust temperature and the exhaust temperature correction coefficient.

[0124] S609: Obtain an exhaust temperature correction coefficient based on the real-time exhaust temperature of the engine and a first preset corresponding relationship.

[0125] S610, obtaining a regeneration correction torque according to the regeneration torque correction value and the exhaust temperature correction coefficient.

[0126] S611, obtaining the engine torque in the driving regeneration control mode according to the regeneration correction torque and the engine real-time torque.

[0127] S612: completing driving regeneration according to the engine torque in the driving regeneration control mode.

[0128] S613, when the vehicle enters the parking regeneration control mode, the vehicle operating status information is obtained, and the vehicle operating status information includes engine speed, vehicle speed, vehicle gear status, ECU power-on status and clutch status.

[0129] Among them, when the vehicle has a parking demand, according to the vehicle operation mode and the power battery SOC value, the corresponding vehicle enters the parking regeneration mode. Because the engine and clutch are separated when the vehicle is parked, the engine is in a shutdown or idling state at this time, and the exhaust temperature of the engine will decrease, affecting the regeneration effect. Therefore, after the vehicle enters the parking regeneration control mode, it is necessary to appropriately increase the engine exhaust temperature. Before adjustment, it is also necessary to obtain the vehicle operation status information to ensure that the vehicle operation status meets the preset conditions, that is, including the engine speed within the preset range. The preset range can be set according to the actual design requirements. The vehicle speed is 0km / h, the vehicle gear is in neutral, the ECU is in the power-on state, and the clutch is in the disengaged state. When all the above conditions are met, it is considered that parking charging regeneration can be performed.

[0130] S614: Determine the engine required torque based on the vehicle operating status information.

[0131] Among them, when the vehicle operating state meets the preset conditions, parking charging regeneration is performed, and the engine required torque is determined accordingly, so that the engine can drive the motor, thereby increasing the engine load to increase the engine exhaust temperature.

[0132] S615: Parking charging regeneration is completed according to the engine demand torque.

[0133] Among them, the vehicle gear is in neutral state, the engine and clutch are engaged, and the engine load is increased by the engine demand torque, which avoids the reduction of exhaust temperature when the vehicle is parked or idling, improves the regeneration efficiency, and avoids the vehicle's after-treatment system from suddenly shutting down under high temperature conditions, causing damage to the after-treatment system.

[0134] The embodiment of the present invention determines that the vehicle enters the parking regeneration control mode according to the engine operation mode and the power battery SOC value; when the vehicle enters the parking regeneration control mode, the vehicle operation status information is obtained, and the vehicle operation status information includes the engine speed, the vehicle speed, the vehicle gear status, the ECU power-on status and the clutch status; the engine required torque is determined according to the vehicle operation status information; the parking charging regeneration is completed according to the engine required torque, and the engine exhaust temperature is increased by the engine required torque to ensure the parking charging regeneration effect of the engine.

[0135] Figure 8 A schematic diagram of the structure of a regeneration control device for a hybrid vehicle provided in an embodiment of the present invention, wherein the regeneration control device for a hybrid vehicle executes a regeneration control method for a hybrid vehicle according to any one of the above embodiments, and the regeneration control device for a hybrid vehicle comprises:

[0136] The engine real-time speed and engine real-time torque acquisition module 201 is used to acquire the engine real-time speed and engine real-time torque when the vehicle enters the driving regeneration control mode;

[0137] A regeneration torque correction value acquisition module 202 is used to acquire a regeneration torque correction value according to the real-time engine speed and the real-time engine torque;

[0138] The engine real-time exhaust temperature acquisition module 203 is used to acquire the engine real-time exhaust temperature;

[0139] The exhaust temperature correction coefficient acquisition module 204 is used to acquire the exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine;

[0140] The engine torque acquisition module 205 in the driving regeneration control mode is used to acquire the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient;

[0141] The driving regeneration completion module 206 is used to complete the driving regeneration according to the engine torque in the driving regeneration control mode.

[0142] It should be noted that, since the regeneration control device for a hybrid vehicle provided in this embodiment includes any of the regeneration control methods for a hybrid vehicle provided in the embodiments of the present invention, it has the same or corresponding beneficial effects as the regeneration control method for a hybrid vehicle, and will not be described in detail here.

[0143] An embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a processor to implement the regeneration control method for a hybrid vehicle described in any one of the above embodiments when executed.

[0144] Computer readable storage medium can be a tangible medium that can contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. Computer readable storage medium can include but is not limited to electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the above. Alternatively, computer readable storage medium can be a machine readable signal medium. More specific examples of machine readable storage medium can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0145] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0146] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A regeneration control method for a hybrid vehicle, characterized in that: include: When the vehicle enters the driving regeneration control mode, the real-time engine speed and real-time engine torque are obtained; Acquire a regenerative torque correction value according to the real-time engine speed and the real-time engine torque; Get the real-time exhaust temperature of the engine; Obtaining an exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine; Acquire the engine torque in the driving regeneration control mode according to the engine real-time torque, the regeneration torque correction value and the exhaust temperature correction coefficient; The driving regeneration is completed according to the engine torque in the driving regeneration control mode.

2. The regeneration control method for a hybrid vehicle according to claim 1, characterized in that: Obtaining a regenerative torque correction value according to the real-time engine speed and the real-time engine torque includes: Obtaining a regenerative torque correction table, wherein the regenerative torque correction table represents a mapping relationship between a preset engine speed and a preset engine torque to obtain a target regenerative torque correction value; A regenerative torque correction value is obtained according to the engine real-time speed, the engine real-time torque and the regenerative torque correction table.

3. The regeneration control method for a hybrid vehicle according to claim 1, characterized in that: Obtaining an exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine includes: Acquire a first preset corresponding relationship, wherein the first preset corresponding relationship represents a corresponding relationship between an engine exhaust temperature and an exhaust temperature correction coefficient; An exhaust temperature correction coefficient is obtained according to the real-time exhaust temperature of the engine and the first preset corresponding relationship.

4. The regeneration control method for a hybrid vehicle according to claim 1, characterized in that: The engine torque in the driving regeneration control mode is obtained according to the engine real-time torque, the regeneration torque correction value and the exhaust temperature correction coefficient, including: Obtaining a regeneration correction torque according to the regeneration torque correction value and the exhaust temperature correction coefficient; The engine torque in the driving regeneration control mode is obtained according to the regeneration correction torque and the engine real-time torque.

5. The regeneration control method for a hybrid vehicle according to claim 1, characterized in that: Before the vehicle enters the driving regeneration control mode, it also includes: Get the engine operating mode; Get the power battery SOC value; It is determined according to the engine operation mode and the power battery SOC value whether the vehicle enters a driving regeneration control mode or a parking regeneration control mode.

6. The regeneration control method for a hybrid vehicle according to claim 5, characterized in that: Determining whether the vehicle enters a driving regeneration control mode or a parking regeneration control mode according to the engine operation mode and the power battery SOC value includes: When the vehicle enters the parking regeneration control mode, the vehicle operation status information is obtained, wherein the vehicle operation status information includes engine speed, vehicle speed, vehicle gear status, ECU power-on status and clutch status; determining the engine required torque according to the vehicle operating state information; Parking charging regeneration is completed according to the engine demand torque.

7. A regeneration control device for a hybrid vehicle, characterized in that: The regeneration control device of the hybrid vehicle executes the regeneration control method of the hybrid vehicle according to any one of claims 1 to 6, and the regeneration control device of the hybrid vehicle comprises: The engine real-time speed and engine real-time torque acquisition module is used to obtain the engine real-time speed and engine real-time torque when the vehicle enters the driving regeneration control mode; A regenerative torque correction value acquisition module, used for acquiring a regenerative torque correction value according to the real-time engine speed and the real-time engine torque; The engine real-time exhaust temperature acquisition module is used to obtain the engine real-time exhaust temperature; An exhaust temperature correction coefficient acquisition module is used to acquire the exhaust temperature correction coefficient according to the real-time exhaust temperature of the engine; The engine torque acquisition module in the driving regeneration control mode is used to acquire the engine torque in the driving regeneration control mode according to the real-time engine torque, the regeneration torque correction value and the exhaust temperature correction coefficient; The driving regeneration completion module is used to complete the driving regeneration according to the engine torque in the driving regeneration control mode.

8. A hybrid vehicle, characterized in that: The hybrid vehicle comprises: an engine, a motor, a power battery, a post-processing system and a controller, wherein the controller is connected to the engine, the motor, the power battery and the post-processing system respectively; The controller is used to execute the regeneration control method for a hybrid vehicle according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the regeneration control method for a hybrid vehicle according to any one of claims 1 to 6 when executed.

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