Gear shift charging control method, device, vehicle and storage medium for hybrid vehicle

Abstract

The present invention relates to the field of vehicle technology, and specifically discloses a gear shifting and charging control method, device, vehicle and storage medium for a hybrid vehicle. The method obtains the vehicle's driving parameters after confirming that the vehicle has started successfully; determines that the vehicle meets the gear shifting conditions based on the current gear, throttle opening and vehicle speed; determines a target gear shifting interval based on load, slope and acceleration; evaluates in sequence based on the throttle opening and vehicle speed whether the vehicle can remain stable in each preselected gear within the target gear shifting interval after switching to the preselected gear, and uses the preselected gear that can remain stable in the gear as a target gear to be selected; when the battery SOC power is less than a set power, determines the charging efficiency of each target gear to be selected in sequence based on the load, slope, acceleration and battery SOC power, and switches the vehicle from the current gear to the target gear to be selected with the highest charging efficiency, which can ensure the charging efficiency of the battery and further ensure the diversity of vehicle driving mode selection in subsequent driving.

Description

Technical Field

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

[0002] A hybrid electric vehicle (HEV) is a vehicle whose drive system consists of two or more simultaneously operating individual drive systems. The vehicle's driving power is provided by the individual drive systems individually or collectively, depending on the actual driving state. Various classifications exist due to differences in components, layout, and control strategies. The energy-saving and low-emission features of hybrid vehicles have attracted significant attention in the automotive industry and have become a key focus of automotive research and development.

[0003] In order to keep the vehicle in good condition while driving, it is necessary to change gears according to different situations. In the prior art, for example, a previous patent with application number CN201410274202.5 discloses a vehicle shifting method. First, based on the battery SOC, the driver's required torque and the vehicle state, it is determined whether the battery is in a "dischargeable state" or a "charge-required state"; secondly, the gears that may appear at a certain vehicle speed under the "dischargeable state" and "charge-required state" states are determined, as well as the engine torque and speed corresponding to each gear; finally, the target gear is determined based on the condition of minimizing the engine fuel consumption rate, and whether to perform the gear shift operation. However, when the battery SOC is low, if the battery is not charged as soon as possible, it will affect the vehicle's subsequent drive mode selection (for example, when the battery SOC is low, pure electric drive cannot be used). However, the prior art does not fully consider the issue of charging efficiency when the vehicle shifts gears. Summary of the Invention

[0004] The object of the present invention is to provide a hybrid vehicle shift charging control method, device, vehicle and storage medium to ensure the charging efficiency of the battery when shifting when the battery SOC is low.

[0005] In one aspect, the present invention provides a hybrid vehicle shift charging control method, the hybrid vehicle shift charging control method comprising:

[0006] Confirm that the vehicle started successfully;

[0007] Obtaining vehicle driving parameters, including vehicle acceleration, vehicle load, slope, throttle opening, current gear, vehicle speed, and battery SOC;

[0008] determining that the vehicle meets a gear shift condition based on the current gear position, the throttle opening, and the vehicle speed;

[0009] determining a target shift range based on the load, the slope, and the acceleration, wherein each gear within the target shift range is defined as a preselected gear;

[0010] evaluating in sequence based on the throttle opening and vehicle speed whether the vehicle can remain stable in the gear after being switched to each of the preselected gears, and selecting the preselected gear that can remain stable in the gear as the target gear to be selected;

[0011] Determine whether the battery SOC is less than a set power;

[0012] If so, determining the charging efficiency of each of the target gears to be selected in sequence based on the load, the slope, the acceleration, and the battery SOC, and taking the target gear with the highest corresponding charging efficiency as the target gear;

[0013] The vehicle switches from the current gear to the target gear.

[0014] As a preferred technical solution of the hybrid vehicle shift charging control method, determining whether the vehicle meets the shift condition based on the current gear position, the throttle opening, and the vehicle speed includes:

[0015] Determining vehicle speed point information based on the current gear and the throttle opening, the vehicle speed point information including an upshift vehicle speed point of the current gear and a downshift vehicle speed point of the current gear;

[0016] determining whether the vehicle speed is between an upshift speed point for the current gear and a downshift speed point for the current gear;

[0017] If not, it is determined that the vehicle meets the gear shifting conditions.

[0018] As a preferred technical solution of the hybrid vehicle shift charging control method, evaluating whether the vehicle can remain stable in the preselected gear after shifting to the preselected gear based on the throttle opening and vehicle speed includes:

[0019] determining an upshift vehicle speed point of the preselected gear and a downshift vehicle speed point of the preselected gear after the vehicle is switched to the preselected gear based on the throttle opening and the preselected gear;

[0020] determining whether the vehicle speed is between an upshift vehicle speed point of the preselected gear and a downshift vehicle speed point of the preselected gear;

[0021] If so, the vehicle can remain stable in the gear after switching to the preselected gear; if not, the vehicle cannot remain stable in the gear after switching to the preselected gear.

[0022] As a preferred technical solution of the hybrid vehicle shift charging control method, determining the target shift interval based on the load, the slope, and the acceleration includes:

[0023] Obtaining a first correlation between load, slope, acceleration, and target shift interval;

[0024] A target shift section is determined based on the first association, the load, the slope, and the acceleration.

[0025] As a preferred technical solution of the hybrid vehicle shift charging control method, the charging efficiency of the target gear to be selected is determined based on the load, the slope, the acceleration, and the battery SOC;

[0026] Obtaining a second correlation between the load, slope, acceleration, battery SOC, and charging efficiency of the target gear to be selected;

[0027] The charging efficiency of the target gear to be selected is determined according to the second association relationship and the load, the slope, the acceleration and the battery SOC.

[0028] As a preferred technical solution of the hybrid vehicle shift charging control method, the hybrid vehicle shift charging control method further includes, between obtaining the vehicle driving parameters and determining whether the vehicle meets the shifting conditions based on the current gear position, the throttle opening, and the vehicle speed:

[0029] Get the turning radius of the road where the vehicle is located;

[0030] Determining whether the slope is outside a preset slope range and the turning radius is outside a preset radius range;

[0031] If so, confirm that the vehicle can shift freely.

[0032] As a preferred technical solution for the gear shifting and charging control method of a hybrid vehicle, if the slope is within the preset slope range, or the turning radius is within the preset radius range, gear shifting is prohibited until the slope is outside the preset slope range, or the turning radius is outside the preset radius range, and continues for a preset time, at which time the vehicle is allowed to shift freely.

[0033] On the other hand, the present invention also provides a hybrid vehicle shift charging control device, comprising:

[0034] Start confirmation module, used to confirm that the vehicle started successfully;

[0035] A driving parameter acquisition module is used to obtain the vehicle's driving parameters; the driving parameters include the vehicle's acceleration, load, slope, throttle opening, current gear, speed and battery SOC;

[0036] a vehicle shift confirmation module, configured to determine, based on the current gear position, the throttle opening, and the vehicle speed, whether the vehicle satisfies a shift condition;

[0037] a target shift interval determining module, configured to determine a target shift interval based on the load, the slope, and the acceleration, wherein each gear within the target shift interval is defined as a preselected gear;

[0038] a target gear position determination module for evaluating, based on the throttle opening and the vehicle speed, whether the vehicle can remain stable in the gear after switching to each of the preselected gear positions, and selecting the preselected gear position that can remain stable in the gear position as the target gear position for selection;

[0039] A judgment module, used to judge whether the battery SOC power is less than a set power;

[0040] a target gear determination module, configured to, when the battery SOC is less than the set power, determine the charging efficiency of each of the target gears to be selected based on the load, the slope, the acceleration, and the battery SOC, and select the target gear with the highest corresponding charging efficiency as the target gear;

[0041] The gear shift execution module is used to switch the vehicle from the current gear to the target gear.

[0042] On the other hand, the present invention further provides a vehicle, comprising an engine, a motor, a battery, and a gearbox, wherein the engine and the motor are drivingly connected, the motor and the gearbox are drivingly connected, a clutch device is provided between the engine and the motor, and the battery is connected to the motor; the vehicle further comprises:

[0043] Driving controller;

[0044] A throttle opening sensor, configured to collect the throttle opening of the vehicle and send the collected throttle opening to the driving controller;

[0045] An acceleration sensor, configured to collect the acceleration of the vehicle and send the collected acceleration to the driving controller;

[0046] A pressure sensor is used to collect the load of the vehicle and send the collected load to the driving controller;

[0047] A gear position sensor, configured to acquire the current gear position of the vehicle and send the acquired current gear position to the driving controller;

[0048] A vehicle speed sensor, configured to collect the vehicle speed and send the collected vehicle speed to the driving controller;

[0049] A battery controller, the battery controller is used to detect the SOC power of the battery and send the detected battery SOC power to the driving controller;

[0050] A gyroscope, configured to collect the slope of the vehicle and send the collected slope to the driving controller;

[0051] a memory for storing one or more programs;

[0052] When the one or more programs are executed by the driving controller, the driving controller controls the vehicle to implement the hybrid vehicle shifting and charging control method described in any of the above solutions.

[0053] On the other hand, the present invention further provides a storage medium having a computer program stored thereon, which, when executed by a driving controller, enables the vehicle to implement the hybrid vehicle shift charging control method as described in any of the above solutions.

[0054] The beneficial effects of the present invention are:

[0055] The present invention provides a gear shifting and charging control method, device, vehicle and storage medium for a hybrid vehicle. The gear shifting and charging control method for a hybrid vehicle obtains the vehicle's driving parameters after confirming that the vehicle has successfully started; determines that the vehicle meets the gear shifting conditions based on the current gear, throttle opening and vehicle speed; determines a target gear shifting interval based on load, slope and acceleration; evaluates in sequence based on the throttle opening and vehicle speed whether the vehicle can remain stable in each preselected gear within the target gear shifting interval after switching to the preselected gear, and uses the preselected gear that can remain stable in the gear as a target gear to be selected; when the battery SOC power is less than a set power, determines in sequence the charging efficiency of each target gear to be selected based on the load, slope, acceleration and battery SOC power, and uses the target gear with the highest corresponding charging efficiency as the target gear; when the vehicle switches from the current gear to the target gear, ensuring that the battery SOC power is low, the gear with the highest charging efficiency is preferentially selected for shifting, so as to ensure the charging efficiency of the battery as soon as possible, thereby ensuring the diversity of vehicle driving mode selection during subsequent driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 The process of the hybrid vehicle shift charging control method in the embodiment of the present invention is as follows Figure 1 ;

[0057] Figure 2 The process of the hybrid vehicle shift charging control method in the embodiment of the present invention is as follows Figure 2 ;

[0058] Figure 3 The process of the hybrid vehicle shift charging control method in the embodiment of the present invention is as follows Figure 3 ;

[0059] Figure 4 The process of the hybrid vehicle shift charging control method in the embodiment of the present invention is as follows Figure 4 ;

[0060] Figure 5 The process of the hybrid vehicle shift charging control method in the embodiment of the present invention is as follows Figure 5 ;

[0061] Figure 6 Schematic diagram of the structure of a gear shift charging control device for a hybrid vehicle according to an embodiment of the present invention;

[0062] Figure 7 Schematic diagram of the structure of a vehicle in an embodiment of the present invention.

[0063] In the picture:

[0064] 10. Start confirmation module; 11. Driving parameter acquisition module; 12. Vehicle shift confirmation module; 13. Target shift range determination module; 14. Target gear determination module; 15. Judgment module; 16. Target gear determination module; 17. Shift execution module;

[0065] 20. Engine; 21. Motor; 22. Battery; 23. Gearbox; 24. Driving controller; 25. Throttle opening sensor; 26. Acceleration sensor; 27. Pressure sensor; 28. Gear position sensor; 29. ​​Vehicle speed sensor; 30. Battery controller; 31. Gyroscope; 32. Memory. DETAILED DESCRIPTION

[0066] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0067] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0068] The terms involved in this embodiment are explained as follows:

[0069] Gross mass: the sum of the mass of the vehicle when empty and the mass of the cargo loaded.

[0070] Slope: The slope of the road on which the vehicle is traveling can be divided into uphill and downhill. When the vehicle is moving forward, the power required by the vehicle increases when going uphill, and the power required by the vehicle decreases when going downhill.

[0071] Hybrid heavy-duty trucks: The mechanical power system of traditional vehicles is fuel tank-engine-transmission-final reducer to wheels. In addition to the traditional mechanical power system, the hybrid vehicle transmission system adds an electric path power system of battery-motor-transmission-final reducer-wheel.

[0072] Gearbox: A variable speed transmission mechanism that can be manipulated by a shift mechanism, which can amplify or reduce the speed and torque of the input shaft or output shaft.

[0073] Skip shift function: When the number of gears in the transmission is small, sequential shifting is generally adopted: 1st gear - 2nd gear - 3rd gear, etc. However, when the number of gears in the transmission is large, in order to avoid frequent gear shifting, skip shifting is required, such as directly shifting from 1st gear to 3rd gear.

[0074] Gear shifting process: The process of the gearbox switching from one gear to another. The process generally consists of clearing torque - disengaging the clutch - disengaging the gear - synchronizing - selecting the gear - engaging the gear - closing the clutch.

[0075] Clutch solenoid valve: It controls the air intake and exhaust of the cylinder to realize the separation and combination of the driving plate and the driven plate of the clutch, which is equivalent to the switch of the cylinder.

[0076] Clutch control: mainly refers to controlling the speed and target position of clutch separation and engagement. This part of the control is achieved through the clutch's intake and exhaust solenoid valves.

[0077] Engine control mode: The engine is controlled with the required torque or required speed as the target. For example, when the engine speed is the control target, it is called the engine speed control mode; when the engine torque is the control target, it is called the engine torque control mode.

[0078] Motor control mode: The motor is controlled based on the required torque or required speed. For example, when the motor speed is the control target, it is called the motor speed control mode; when the motor torque is the control target, it is called the motor torque control mode.

[0079] Vehicle control mode: divided into pure electric control mode, engine control mode and hybrid power control mode. When the motor alone drives the vehicle, it is called pure electric control mode, when the engine alone drives the vehicle, it is called engine control mode, and when both drive the vehicle together, it is called hybrid power control mode.

[0080] Example 1

[0081] In the existing technology, the battery is determined to be in a "dischargeable state" or "requires charging state" based on the battery SOC, the driver's required torque, and the vehicle state. Secondly, the gears that may appear at a certain vehicle speed under the "dischargeable state" and "requires charging state" states are determined, as well as the engine torque and speed corresponding to each gear. Finally, the target gear is determined based on the minimum engine fuel consumption rate, and it is determined whether to perform a gear shift operation. However, if the battery SOC is low and the battery is not charged as soon as possible, it will affect the vehicle's subsequent drive mode selection (for example, when the battery SOC is low, pure electric drive cannot be used). The existing technology does not fully consider the issue of charging efficiency when the vehicle shifts gears.

[0082] To address this issue, this embodiment provides a hybrid vehicle shift charging control method to address the aforementioned issues. This hybrid vehicle shift charging control method can be performed by a hybrid vehicle shift charging control device, which can be implemented via software and / or hardware and integrated into a vehicle with a hybrid powertrain.

[0083] Specifically, if Figure 1 As shown, the hybrid vehicle shift charging control method includes the following steps:

[0084] S100: Confirm that the vehicle has started successfully.

[0085] Specifically, whether the vehicle has successfully started can be determined by whether the vehicle speed exceeds a preset speed. When the vehicle speed exceeds the preset speed, the vehicle is confirmed to have successfully started. The preset speed can be set as needed.

[0086] S110: Acquire vehicle driving parameters.

[0087] Among them, the vehicle's driving parameters include the vehicle's acceleration, load, slope, throttle opening, current gear, vehicle speed and battery SOC power.

[0088] The vehicle's acceleration can be obtained through an acceleration sensor, the vehicle's load can be detected through a pressure sensor, the slope of the vehicle's current road section can be obtained through a gyroscope, the throttle opening can be obtained through a throttle opening sensor, the current gear can be determined through a gear sensor or through the speed ratio of the input speed and output speed of the transmission, the vehicle's speed can be obtained through a speed sensor, and the battery SOC power can be obtained through a battery controller.

[0089] S120: Determine whether the vehicle meets the gear shifting condition based on the current gear position, throttle opening and vehicle speed.

[0090] Specifically, S120 includes the following steps:

[0091] S121: Determine vehicle speed point information based on the current gear position and throttle opening.

[0092] The speed point information includes the current gear's upshift speed point and the current gear's downshift speed point. Both the current gear's upshift speed point and the current gear's downshift speed point are speed point values, and the current gear's downshift speed point value is smaller than the current gear's upshift speed point value. In this embodiment, the driving controller pre-stores a map 1 containing the current gear, throttle opening, and speed point information. The corresponding previous speed point information can be retrieved from the map 1 using the current gear and throttle opening. The map 1 can be obtained through extensive prior experimentation.

[0093] S122: Determine whether the vehicle speed is between the upshift speed point of the current gear and the downshift speed point of the current gear.

[0094] If not, it is determined that the vehicle meets the gear shifting condition. If so, it is determined that the vehicle does not meet the gear shifting condition, and S110 is executed again.

[0095] Among them, when the vehicle speed is between the upshift speed point of the current gear and the downshift speed point of the current gear, it indicates that the vehicle speed and the current gear are matched, the gear shifting conditions are not met and there is no need to shift gears; when the vehicle speed is less than the downshift speed point of the current gear, it indicates that the vehicle speed and the current gear are not matched, the gear shifting conditions are met and the vehicle needs to downshift; when the vehicle speed is greater than the upshift speed point of the current gear, it indicates that the vehicle speed and the current gear are also not matched, the gear shifting conditions are met and the vehicle needs to upshift.

[0096] S130: Determine a target shift range based on load, slope, and acceleration.

[0097] The target shift range is a set of gears that can be switched from the current gear, which is preliminarily determined. The target shift range includes at least one preselected gear. In this embodiment, each gear within the target shift range is defined as a preselected gear. Specifically, S130 includes the following steps:

[0098] S131: Obtain a first correlation between load, slope, acceleration and target shift range.

[0099] A first correlation between load, slope, acceleration and target shift range may be pre-stored in the driving controller, and the first correlation may be obtained through a large number of experiments in the early stages.

[0100] S132: Determine a target shift range based on the first association relationship, load, slope, and acceleration.

[0101] S140: Based on the throttle opening and the vehicle speed, it is evaluated in sequence whether the vehicle can remain stable in each pre-selected gear after being switched to the pre-selected gear, and the pre-selected gear that can remain stable in the gear is selected as the target gear to be selected.

[0102] Specifically, evaluating whether the vehicle can remain stable in the preselected gear after being switched to the preselected gear based on the throttle opening and the vehicle speed includes the following steps:

[0103] S141: Determine preselected vehicle speed point information after the vehicle is switched to the preselected gear based on the throttle opening and the preselected gear. The preselected vehicle speed point information includes an upshift vehicle speed point of the preselected gear and a downshift vehicle speed point of the preselected gear.

[0104] A map 2 containing the current throttle opening, preselected gear, and preselected speed point information can be pre-stored in the vehicle controller. The corresponding preselected speed point information can be retrieved from the map 2 using the current throttle opening and preselected gear. The map 2 can be obtained through extensive early experiments.

[0105] S142: Determine whether the vehicle speed is between the upshift speed point of the preselected gear and the downshift speed point of the preselected gear.

[0106] If yes, then after the vehicle switches to the pre-selected gear, the vehicle speed can match the pre-selected gear and can remain stable in the gear, and the pre-selected gear can be used as the target gear to be selected. If no, then after the vehicle switches to the pre-selected gear, it will continue to switch gears and will not remain stable in the gear, and the pre-selected gear is not suitable as the target gear to be selected.

[0107] By repeating steps S141-S142 and evaluating each pre-selected gear position, all target gear positions to be selected can be screened out. There may be one or more target gear positions to be selected, which is related to the specific model and speed of the vehicle.

[0108] S150: Determine whether the battery SOC is less than the set power.

[0109] If so, execute S160.

[0110] Among them, when the battery SOC is less than the set power, it indicates that the battery SOC is low and pure electric driving cannot be achieved. When the battery SOC is not less than the set power, it indicates that the battery SOC is sufficient and pure electric driving can be achieved.

[0111] S160: Determine the charging efficiency of each target gear to be selected in sequence based on the load, slope, acceleration and battery SOC, and use the target gear to be selected with the highest corresponding charging efficiency as the target gear.

[0112] Specifically, determining the charging efficiency of the target gear to be selected based on the load, slope, acceleration, and battery SOC includes the following steps:

[0113] S161: Obtain a second correlation between the load, slope, acceleration, battery SOC, and charging efficiency of the target gear to be selected.

[0114] A second correlation between load, slope, acceleration, battery SOC and target gear to be selected may be pre-stored in the driving controller, and the second correlation may be obtained through a large number of experiments in the early stages.

[0115] S162: Determine the charging efficiency of the target gear to be selected based on the second association relationship and the load, slope, acceleration, and battery SOC.

[0116] S170: The vehicle switches from the current gear to the target gear.

[0117] The shift charging control method for a hybrid vehicle provided in this embodiment obtains vehicle driving parameters after the vehicle is successfully started, and determines whether the vehicle meets the shifting conditions based on the current gear, throttle opening, and vehicle speed; determines a target shift range based on load, slope, and acceleration; sequentially evaluates whether the vehicle can remain stable in each preselected gear within the target shift range based on the throttle opening and vehicle speed, and selects the preselected gear that can remain stable as the target gear to be selected; when the battery SOC is less than a set charge, sequentially determines the charging efficiency of each target gear to be selected based on the load, slope, acceleration, and battery SOC, and selects the target gear with the highest charging efficiency as the target gear; and switches the vehicle from the current gear to the target gear, ensuring that when the battery SOC is low, the gear with the highest charging efficiency is preferentially selected for shifting, thereby ensuring the fastest battery charging efficiency and thereby ensuring diversity in vehicle drive mode selection during subsequent driving.

[0118] Alternatively, please continue to refer to Figure 1 The hybrid vehicle shift charging control method further includes the following steps between S110 and S120:

[0119] S111: Obtain the turning radius of the road on which the vehicle is located.

[0120] The turning radius of the road on which the vehicle is located can be determined by the navigation system.

[0121] S112: Determine whether the slope is outside a preset slope range and the turning radius is outside a preset radius range.

[0122] If yes, execute S113; if no, execute S114.

[0123] S113: Confirm that the vehicle can shift gears freely, and execute S120.

[0124] S114: Gear shifting prohibited.

[0125] S115: Determine whether the slope is outside a preset slope range, the turning radius is outside a preset radius range, and the conditions last for at least a preset time.

[0126] If yes, execute S113; if no, repeat S114.

[0127] When the slope is outside the preset slope range and the turning radius is outside the preset radius range, the vehicle can now travel normally. When the slope is within the preset slope range or the turning radius is within the preset radius range, it indicates that the vehicle is currently traveling on a curve and / or a slight slope, which may lead to frequent gear shifting. Shifting is prohibited to avoid frequent shifting when the vehicle is traveling on a curve and / or a slight slope. After shifting is prohibited, if the slope and turning radius are again outside the preset slope range and remain outside the preset radius range for at least a preset time, it indicates that the vehicle has exited the curve and / or the slight slope, and free shifting is allowed again.

[0128] Alternatively, see Figure 2 In S150, it is determined whether the battery SOC is less than the set power. If not, S180-S220 are executed.

[0129] S180: When the vehicle speed is higher than the upshift speed point of the current gear, the highest gear among the target gears to be selected is used as the upshift target gear, and the upshift operation is performed to switch the current gear of the vehicle to the upshift target gear; when the vehicle speed is lower than the downshift speed point of the current gear, the lowest gear among the target gears to be selected is used as the downshift target gear, and the downshift operation is performed to switch the current gear of the vehicle to the downshift target gear.

[0130] In step S180, if an upshift is being performed, if there are multiple gears between the current gear and the target gear, sequential upshifting can be avoided, thereby reducing the upshift frequency. Similarly, if a downshift is being performed, if there are multiple gears between the current gear and the target gear, sequential downshifting can be avoided, thereby reducing the upshift frequency.

[0131] S190: Determine vehicle speed point information based on the current gear position and throttle opening.

[0132] The vehicle speed point information includes the vehicle speed point for upshifting the current gear and the vehicle speed point for downshifting the current gear.

[0133] It can be understood that the current gear position in S190 refers to the upshift target gear position after the upshift operation, or the downshift target gear position after the downshift operation.

[0134] S200: Determine an offset change amount based on the load, slope, and acceleration.

[0135] The offset change includes the upshift speed point offset and the downshift speed point offset. A map3 of load, slope, acceleration, and offset change can be pre-stored in the vehicle controller. The corresponding offset change can be retrieved from the acquired load, slope, and acceleration. This map3 can be obtained through extensive early experimentation.

[0136] S210: Perform offset correction on the vehicle speed point information and continue for a first set time.

[0137] The offset correction of the vehicle speed point information includes: reducing the upshift vehicle speed point of the current gear by the upshift vehicle speed point offset on an existing basis, and increasing the downshift vehicle speed point of the current gear by the downshift vehicle speed point offset on an existing basis.

[0138] Through steps S190 to S210, after a gear shift operation, the overlap between the vehicle speed point information of the current gear and the vehicle speed point information of the two adjacent gears can be reduced, or eliminated, thereby further preventing the problem of upshifting or downshifting after a gear shift. Taking an upshift as an example, after an upshift, by increasing the downshift speed point offset of the current gear relative to the existing downshift speed point, the gap between the upshift speed point of the gear one gear lower than the current gear can be widened, thereby minimizing the overlap between the two. This can minimize the occurrence of downshifting after an upshift within a first set time, and the first set time can be set as needed.

[0139] Alternatively, as Figure 3 and Figure 4 As shown, in S100, confirming that the vehicle has started successfully includes the following steps:

[0140] S1000: Acquire the driver's driving intention, the battery's SOC, and the required torque for vehicle starting.

[0141] When the driver's driving intention is the power mode, or the SOC of the battery is less than the set power, or the required torque for starting the vehicle is greater than the set torque, S1100 is executed.

[0142] When the driver's driving intention is the economy mode, the SOC of the battery is not less than the set power, and the required torque for starting the vehicle is not greater than the set torque, S1010 is executed.

[0143] The driver's driving intention includes starting in economy mode and starting in power mode. The vehicle is equipped with a toggle button for starting in economy mode and power mode, and the driver's driving intention can be determined by the position of the toggle button. Starting in economy mode corresponds to pure electric mode, while starting in power mode corresponds to hybrid mode. The battery's state of charge (SOC) can be obtained through interaction with the vehicle's battery controller. The required torque for starting the vehicle can be queried through a map 4 of the vehicle's load, slope, and required torque. This map 4 was obtained through extensive preliminary experiments. The set power and set torque can be set as needed.

[0144] S1100: Determine whether the vehicle starts in hybrid mode.

[0145] In this embodiment, the hybrid vehicle specifically adopts a P2 configuration, with the electric motor located between the engine and transmission, and a clutch device interposed between the engine and motor. The clutch device engages and disengages to distribute torque between the engine and motor, enabling both pure electric and hybrid mode starts. When the vehicle starts in hybrid mode, both the electric motor and the engine provide torque.

[0146] S1200: Obtain the vehicle's load and the slope of the road on which the vehicle is located.

[0147] S1300: Determine a first starting gear and a first gear range based on the load and the slope, the first starting gear being within the first gear range.

[0148] The vehicle controller can pre-store a map 5 for load, slope, and first starting gear, as well as a map 6 for load, slope, and first gear range. The corresponding first starting gear can be found in map 5 and the corresponding first gear range can be found in map 6 based on the collected load and slope. Both map 5 and map 6 can be obtained through extensive early experiments.

[0149] The first gear range includes at least two gears. For example, the first gear range includes three gears, namely low gear, middle gear, and high gear. The first starting gear can be one of the low gear, middle gear, and high gear, which is related to the vehicle load and slope.

[0150] S1400: Determine a first torque step of the motor based on the load and the slope.

[0151] A third correlation between load, slope, and the first torque step of the motor can be pre-stored in the vehicle controller, and the corresponding first torque step of the motor can be queried from the third correlation using the collected load and slope. The third correlation can be obtained through a large number of early experiments.

[0152] S1500: Determine a duty cycle of a solenoid valve of a clutch for a first starting gear based on the load and the slope.

[0153] The solenoid valve of the first starting gear clutch controls the engagement and disengagement of the first starting gear clutch. A map7 of load, slope, first starting gear, and duty cycle can be pre-stored in the vehicle controller. The corresponding duty cycle can be retrieved from the collected load, slope, and first starting gear. This map7 can be obtained through extensive early experimentation.

[0154] S1600: Acquire the accelerator pedal opening of the vehicle, and determine a virtual throttle signal value based on the accelerator pedal opening.

[0155] The virtual throttle signal value is used to indicate the driver's driving intention. A map8 of throttle pedal opening and virtual throttle signal values ​​can be pre-stored in the vehicle controller. The corresponding virtual throttle signal value can be retrieved from the map8 using the acquired throttle pedal opening. The throttle pedal opening can be obtained using a position sensor installed on the throttle pedal. The map8 can be obtained through extensive early experiments.

[0156] S1700: Determine the target speed of the engine and the target torque of the motor based on the load, slope, and virtual throttle signal value.

[0157] The target speed of the engine is the speed of the engine before the clutch of the first starting gear is engaged, but the target speed of the engine will decrease due to the influence of the load during the engagement process of the clutch of the first starting gear. The target torque of the motor is the output torque that the motor can achieve after the clutch of the first starting gear is engaged. A fourth relationship diagram of the load, slope, virtual throttle signal value and the target speed of the engine, as well as a fifth relationship diagram of the load, slope, virtual throttle signal value and the target torque of the motor can be pre-stored in the driving controller. The corresponding target speed of the engine can be queried from the fourth relationship diagram through the collected load, slope and virtual throttle signal value. The corresponding target torque of the motor can be queried from the fifth relationship diagram through the collected load, slope and virtual throttle signal value. Both the fourth relationship diagram and the fifth relationship diagram can be obtained through a large number of preliminary experiments.

[0158] S1800: The engine rotates at the target speed.

[0159] S1900: Starting the vehicle in the first starting gear.

[0160] The method of starting the vehicle in the first starting gear comprises the following steps:

[0161] The clutch of the first starting gear is engaged to the slip point; the solenoid valve is operated at a duty cycle to make the clutch of the first starting gear continue to engage toward the full engagement point, and at the same time, the torque of the motor is increased by a first torque step per unit time.

[0162] In the process of engaging the clutch of the first starting gear to the slip point, the driving plate and the driven plate of the clutch have not yet contacted, so the clutch of the first starting gear can be engaged at the fastest speed to reduce the gear selection time.

[0163] S2000: Get the engine speed.

[0164] The real-time engine speed can be obtained through the speed sensor.

[0165] S2100: Determine whether the difference between the rotational speed and the target rotational speed is less than a preset difference.

[0166] The preset difference can be set according to actual needs.

[0167] If it is less than, execute S2200. If it is not less than, execute S2700.

[0168] S2200: There is no risk of engine stalling.

[0169] When the difference between the speed and the target speed is less than the preset difference, it indicates that the engine speed reduction is normal, which is within the range of the influence of the load on the engine speed during normal vehicle starting, which means that there is no risk of the engine stalling.

[0170] S2300: Obtain vehicle speed.

[0171] S2400: Determine whether the vehicle speed is less than a first preset vehicle speed.

[0172] The first preset vehicle speed can be set according to actual needs.

[0173] If it is not less than, it is confirmed that the vehicle has started successfully; if it is less than, execute S2500.

[0174] When the vehicle speed is not less than the first preset speed, it indicates that the vehicle speed has increased to within the normal driving range, indicating that the vehicle has successfully started. When the vehicle speed is less than the first preset speed, it indicates that the vehicle speed is too low, indicating that the vehicle has not successfully started. This may be because the first starting gear is too high and the starting gear needs to be lowered.

[0175] S2500: Determine whether there is a first backup gear lower than the first starting gear in the first gear range.

[0176] If it exists, execute S2600; if it does not exist, end.

[0177] When there is a first backup gear lower than the first starting gear in the first gear range, it indicates that the vehicle can continue to downshift and start. If not, it indicates that the vehicle cannot start normally at this time, which may be caused by excessive load and / or excessive slope.

[0178] S2600: The first standby gear is used as the new first starting gear, and S1900 is executed again.

[0179] S2700: There is a risk of engine stalling, and the number of times the engine has been at risk of stalling is accumulated.

[0180] S2800: Quickly disengage the clutch in the first starting gear.

[0181] The clutch can be quickly separated by the quick separation solenoid valve.

[0182] S2900: Determine whether the number of times the engine is at risk of stalling exceeds a set number.

[0183] If not, execute S3000; if exceeded, end.

[0184] It is understood that the vehicle downshift start cannot be repeated indefinitely, otherwise there will be certain safety hazards. Therefore, the number of times the engine is at risk of stalling can be limited. For example, the set number of times can be set to 2. In other embodiments, it can also be set as needed.

[0185] S3000: Reduce the duty cycle of the solenoid valve of the clutch in the first starting gear by a set value on the existing basis, increase the virtual throttle signal value by a set multiple on the existing basis, increase the first torque step by a set value on the existing basis, and re-execute S1700.

[0186] like Figure 5 As shown, in step S1000, when the driver's driving intention is the economy mode, the SOC parameter of the battery is not less than the set power, and the required torque for starting the vehicle is not greater than the set torque, the following steps are performed:

[0187] S1010: Determine that the vehicle starts in pure electric mode.

[0188] S1011: Obtain the vehicle's load and the slope of the road.

[0189] S1012: Determine a second starting gear and a second gear range based on the load and the slope.

[0190] Among them, the second starting gear is located in the second gear range.

[0191] The vehicle controller can pre-store a map 9 for load, slope, and second starting gear, as well as a map 10 for load, slope, and second gear range. The collected load and slope can be used to query the corresponding second starting gear from map 9, and the corresponding second gear range from map 10. Both map 9 and map 10 can be obtained through extensive early experiments.

[0192] S1013: Determine a second torque step of the motor based on the load and the slope.

[0193] A map 11 of load, slope, and the second torque step of the motor can be pre-stored in the vehicle controller. The corresponding second torque step of the motor can be queried from the map 11 based on the collected load and slope. The map 11 can be obtained through a large number of early experiments.

[0194] S1014: Control the vehicle to start at the second starting gear, and increase the torque of the motor by a second torque step per unit time.

[0195] S1015: Obtain the vehicle speed after the second set time.

[0196] S1016: Determine whether the vehicle speed is not less than a second preset vehicle speed.

[0197] The second set time and the second preset vehicle speed can be set according to actual needs.

[0198] If yes, confirm that the vehicle started successfully; if no, execute S1017.

[0199] S1017: Determine whether there is a second standby gear lower than the second starting gear in the second gear range.

[0200] If it exists, execute S1018; if it does not exist, execute S1100.

[0201] S1018: Set the second standby gear as the new second starting gear, and execute S1014 again.

[0202] Steps S1010 to S1018 enable the vehicle to start in pure power mode in the second starting gear that matches the load and slope, ensuring the reliability of the starting gear selection. If normal start is not possible, a downshift can be performed within the second gear range if conditions permit. If not, the vehicle can start in hybrid mode.

[0203] Example 2

[0204] This embodiment provides a hybrid vehicle shift charging control device, which is used to execute the hybrid vehicle shift charging control method in the first embodiment.

[0205] like Figure 6 As shown, the hybrid vehicle shift charging control device includes a start confirmation module 10, a driving parameter acquisition module 11, a vehicle shift confirmation module 12, a target shift interval determination module 13, a target gear determination module 14, a judgment module 15, a target gear determination module 16 and a shift execution module 17.

[0206] Among them, the starting confirmation module 10 is used to confirm that the vehicle has started successfully; the driving parameter acquisition module 11 is used to obtain the driving parameters of the vehicle; the vehicle gear shift confirmation module 12 is used to determine whether the vehicle meets the gear shift conditions based on the current gear, throttle opening and vehicle speed; the target gear shift interval determination module 13 is used to determine the target gear shift interval based on load, slope and acceleration; the target gear selection determination module 14 is used to evaluate in sequence based on throttle opening and vehicle speed whether the vehicle can remain stable in each pre-selected gear within the target gear shift interval after switching to it, and use the pre-selected gear that can remain stable in gear as the target gear selection; the judgment module 15 is used to judge whether the battery SOC power is less than the set power; the target gear determination module 16 is used to determine the charging efficiency of each target gear selection based on load, slope, acceleration and battery SOC power when the battery SOC power is less than the set power, and use the target gear selection with the highest corresponding charging efficiency as the target gear; the gear shift execution module 17 is used to switch the vehicle from the current gear to the target gear.

[0207] The gear shifting and charging control device for a hybrid vehicle provided in this embodiment and the gear shifting and charging control method for a hybrid vehicle provided in the above embodiment belong to the same inventive concept. Technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as executing the gear shifting and charging control method for a hybrid vehicle.

[0208] Example 3

[0209] like Figure 7As shown, this embodiment provides a vehicle, which includes an engine 20, a motor 21, a battery 22, a gearbox 23, a driving controller 24, a throttle opening sensor 25, an acceleration sensor 26, a pressure sensor 27, a gear position sensor 28, a vehicle speed sensor 29, a battery controller 30, a gyroscope 31, and a memory 32. The engine 20, the motor 21, the battery 22, the gearbox 23, the driving controller 24, the throttle opening sensor 25, the acceleration sensor 26, the pressure sensor 27, the gear position sensor 28, the vehicle speed sensor 29, the battery controller 30, the gyroscope 31, and the memory 32 can be connected via a bus. The engine 20 is connected to the motor 21 by transmission, and the motor 21 is connected to the gearbox 23 by transmission, and a clutch device is provided between the engine 20 and the motor 21, the battery 22 is connected to the motor 21, the throttle opening sensor 25 is used to collect the throttle opening of the vehicle and send the collected throttle opening to the driving controller 24; the acceleration sensor 26 is used to collect the acceleration of the vehicle and send the collected acceleration to the driving controller 24; the pressure sensor 27 is used to collect the load of the vehicle and send the collected load to the driving controller 24; the gear sensor 28 is used to collect the current gear of the vehicle and send the collected current gear to the driving controller 24; the speed sensor 29 is used to collect the speed of the vehicle and send the collected speed to the driving controller 24; the battery controller 30 is used to detect the SOC power of the battery and send the detected battery SOC power to the driving controller 24; the gyroscope 31 is used to collect the slope of the vehicle and send the collected slope to the driving controller 24.

[0210] Memory 32, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the hybrid vehicle shift charging control method described in the embodiments of the present invention. The vehicle controller 24 executes the software programs, instructions, and modules stored in memory 32 to execute various vehicle functions and data processing, thereby implementing the hybrid vehicle shift charging control method described in the embodiments.

[0211] The memory 32 primarily includes a program storage area and a data storage area. The program storage area can store an operating system and at least one application required for a function; the data storage area can store data generated based on the terminal's usage. Furthermore, the memory 32 can include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some examples, the memory 32 may further include memory remotely located from the vehicle controller 24, which can be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0212] The vehicle provided in the third embodiment of the present invention and the gear shifting and charging control method for a hybrid vehicle provided in the above embodiment belong to the same inventive concept. For technical details not fully described in this embodiment, please refer to the above embodiment, and this embodiment has the same beneficial effects as executing the gear shifting and charging control method for a hybrid vehicle.

[0213] Example 4

[0214] The fourth embodiment of the present invention further provides a storage medium having a computer program stored thereon. When the program is executed by a driving controller, the vehicle implements the hybrid vehicle shift charging control method as described in the above embodiment of the present invention.

[0215] Of course, the storage medium containing computer-executable instructions provided in an embodiment of the present invention is not limited to the operations in the hybrid vehicle shifting and charging control method described above, but can also execute related operations in the hybrid vehicle shifting and charging control method provided in an embodiment of the present invention, and has corresponding functions and beneficial effects.

[0216] Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented with the help of software and necessary general-purpose hardware. Of course, it can also be implemented with hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the existing technology, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a robot, personal computer, server, or network device, etc.) to execute the hybrid vehicle shift charging control method described in each embodiment of the present invention.

[0217] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A hybrid vehicle shift charging control method, characterized in that: include: Confirm that the vehicle started successfully; Obtaining vehicle driving parameters, including vehicle acceleration, load, slope, throttle opening, current gear, vehicle speed, and battery SOC; determining that the vehicle meets a gear shift condition based on the current gear position, the throttle opening, and the vehicle speed; determining a target shift range based on the load, the slope, and the acceleration, wherein each gear within the target shift range is defined as a preselected gear; evaluating in sequence based on the throttle opening and the vehicle speed whether the vehicle can remain stable in the gear after being switched to each of the preselected gears, and selecting the preselected gear that can remain stable in the gear as the target gear to be selected; Determine whether the battery SOC is less than a set power; If so, determining the charging efficiency of each of the target gears to be selected in sequence based on the load, the slope, the acceleration, and the battery SOC, and taking the target gear with the highest corresponding charging efficiency as the target gear; The vehicle switches from the current gear to the target gear.

2. The hybrid vehicle shift charging control method according to claim 1, characterized in that: Determining that the vehicle meets the gear shifting condition based on the current gear position, the throttle opening, and the vehicle speed includes: Determining vehicle speed point information based on the current gear and the throttle opening, the vehicle speed point information including an upshift vehicle speed point of the current gear and a downshift vehicle speed point of the current gear; determining whether the vehicle speed is between an upshift speed point for the current gear and a downshift speed point for the current gear; If not, it is determined that the vehicle meets the gear shifting conditions.

3. The hybrid vehicle shift charging control method according to claim 2, characterized in that: Evaluating whether the vehicle can remain stable in the preselected gear after being switched to the preselected gear based on the throttle opening and the vehicle speed includes: determining, based on the throttle opening and the preselected gear, preselected vehicle speed point information after the vehicle is switched to the preselected gear, the preselected vehicle speed point information including an upshift vehicle speed point of the preselected gear and a downshift vehicle speed point of the preselected gear; determining whether the vehicle speed is between an upshift vehicle speed point of the preselected gear and a downshift vehicle speed point of the preselected gear; If so, the vehicle can remain stable in the gear after switching to the preselected gear; if not, the vehicle cannot remain stable in the gear after switching to the preselected gear.

4. The hybrid vehicle shift charging control method according to claim 1, characterized in that: Determining a target shift range based on the load, the slope, and the acceleration includes: Obtaining a first correlation between load, slope, acceleration, and target shift interval; A target shift section is determined based on the first association, the load, the slope, and the acceleration.

5. The hybrid vehicle shift charging control method according to claim 1, characterized in that: Determining the charging efficiency of the target gear to be selected based on the load, the slope, the acceleration, and the battery SOC; Obtaining a second correlation between the load, slope, acceleration, battery SOC, and charging efficiency of the target gear to be selected; The charging efficiency of the target gear to be selected is determined according to the second association relationship and the load, the slope, the acceleration and the battery SOC.

6. The hybrid vehicle shift charging control method according to claim 1, characterized in that: The hybrid vehicle shift charging control method further includes, between acquiring the vehicle driving parameters and determining whether the vehicle meets the shifting condition based on the current gear position, the throttle opening, and the vehicle speed: Get the turning radius of the road where the vehicle is located; Determining whether the slope is outside a preset slope range and the turning radius is outside a preset radius range; If so, confirm that the vehicle can shift freely.

7. The hybrid vehicle shift charging control method according to claim 6, characterized in that: If the slope is within the preset slope range, or the turning radius is within the preset radius range, gear shifting is prohibited until the slope is outside the preset slope range, or the turning radius is outside the preset radius range, and continues for a preset time, at which time the vehicle is allowed to shift gears freely.

8. A hybrid vehicle shift charging control device, characterized in that: include: Start confirmation module, used to confirm that the vehicle started successfully; A driving parameter acquisition module is used to obtain the vehicle's driving parameters; the driving parameters include the vehicle's acceleration, load, slope, throttle opening, current gear, speed and battery SOC; a vehicle shift confirmation module, configured to determine, based on the current gear position, the throttle opening, and the vehicle speed, whether the vehicle satisfies a shift condition; a target shift interval determining module, configured to determine a target shift interval based on the load, the slope, and the acceleration, wherein each gear within the target shift interval is defined as a preselected gear; a target gear position determination module for evaluating, based on the throttle opening and vehicle speed, whether the vehicle can remain stable in the gear after switching to each of the preselected gear positions, and selecting the preselected gear position that can remain stable in the gear position as the target gear position for selection; A judgment module, used to judge whether the battery SOC power is less than a set power; a target gear determination module, configured to, when the battery SOC is less than the set power, determine the charging efficiency of each of the target gears to be selected based on the load, the slope, the acceleration, and the battery SOC, and select the target gear with the highest corresponding charging efficiency as the target gear; The gear shift execution module is used to switch the vehicle from the current gear to the target gear.

9. A vehicle comprising an engine, a motor, a battery and a gearbox, wherein the engine and the motor are in driving connection, the motor and the gearbox are in driving connection, a clutch device is provided between the engine and the motor, and the battery is connected to the motor; characterized in that: The vehicle further comprises: Driving controller; A throttle opening sensor, configured to collect the throttle opening of the vehicle and send the collected throttle opening to the driving controller; An acceleration sensor, configured to collect the acceleration of the vehicle and send the collected acceleration to the driving controller; A pressure sensor is used to collect the load of the vehicle and send the collected load to the driving controller; A gear position sensor, configured to acquire the current gear position of the vehicle and send the acquired current gear position to the driving controller; A vehicle speed sensor, configured to collect the vehicle speed and send the collected vehicle speed to the driving controller; A battery controller, the battery controller is used to detect the SOC power of the battery and send the detected battery SOC power to the driving controller; A gyroscope, configured to collect the slope of the vehicle and send the collected slope to the driving controller; a memory for storing one or more programs; When the one or more programs are executed by the driving controller, the driving controller controls the vehicle to implement the hybrid vehicle shift charging control method according to any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the driving controller, the vehicle implements the hybrid vehicle shift charging control method according to any one of claims 1 to 7.

Images