CN111120644A - Power-interruption-free gear shifting control method and system for hybrid vehicle - Google Patents
Power-interruption-free gear shifting control method and system for hybrid vehicle Download PDFInfo
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- CN111120644A CN111120644A CN201811296779.0A CN201811296779A CN111120644A CN 111120644 A CN111120644 A CN 111120644A CN 201811296779 A CN201811296779 A CN 201811296779A CN 111120644 A CN111120644 A CN 111120644A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
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Abstract
The invention relates to a power-interruption-free gear shifting control method and system for a hybrid vehicle. When the vehicle shifts gears, acquiring an engine output torque value at the moment before the gear shifting moment, the rotating speed of a driving motor at the gear shifting moment, the SOC of a battery at the gear shifting moment and a gear at the moment before the gear shifting moment; the method comprises the steps of determining a power-assisted torque value of a driving motor corresponding to the rotating speed of the driving motor at the gear shifting moment according to the rotating speed of the driving motor at the gear shifting moment, determining the power-assisted torque value according to the SOC of a battery at the gear shifting moment and a gear at the previous moment to obtain a reduced power-assisted torque value, taking the minimum value of an engine output torque value and the reduced power-assisted torque value as an actual power-assisted torque value of the driving motor to output until gear shifting is completed, outputting power output during gear shifting by controlling the driving motor to output the actual power-assisted torque value, achieving unpowered interrupted gear shifting, controlling the torque value accurately, and improving.
Description
Technical Field
The invention relates to the field of hybrid vehicle control, in particular to a hybrid vehicle unpowered interrupt gear shifting control method and system.
Background
Hybrid vehicles are used to perform power output after two or more power sources are mixed together, for example, engine drive and motor drive; the energy can be effectively saved, the oil consumption of the vehicle is reduced, and the effects of energy conservation and emission reduction are achieved. An important application of a driving motor in an electric hybrid vehicle is to provide assistance in a gear shifting process, so that the defect of power interruption in the gear shifting of the vehicle is overcome, but the working condition of a four-wheel-drive hybrid vehicle is complex, the result of power compensation is unsatisfactory due to the lack of a good control method, and the control of the gear shifting assistance becomes the bottleneck to be broken through of the hybrid vehicle.
The patent document with the publication number of CN103963778B issued in chinese patent discloses a method for controlling shift assist of a hybrid vehicle and a corresponding hybrid vehicle, wherein a front axle torque at a moment before shifting is determined according to an actual driving condition of the vehicle, an assist torque which can be provided by an assist motor is determined, an assist level of the assist motor in a shifting process is determined according to the front axle torque and the assist torque, a torque control map of torque reduction or torque rise slopes of different shifting conditions under different levels of pre-calibrated assist levels is called, a torque reduction or torque rise slope in the shifting process is determined, and the shifting torque control is performed according to the slope, which makes up for the shortage of power interruption in the shifting process of an AMT transmission system, improves the smoothness and comfort in the shifting process of the vehicle, improves the drivability of the vehicle, but for a passenger car, a transmission box of the hybrid vehicle still mainly uses a manual transmission box at present, and the driving method is still front-wheel steering rear-wheel driving, so the torque control method cannot be used; in addition, according to the method, the HCU calculates the torque of the front axle of the vehicle and the power compensation which can be provided by the rear axle motor in the gear shifting process at present through signals such as the vehicle speed, the accelerator, the SOC value and the motor temperature, but the output torque of the motor cannot be accurately given only through the signals such as the vehicle speed, the accelerator, the SOC value and the motor temperature, for example, the torque cannot be corrected according to the gear of the vehicle, so that the battery is consumed too fast, and the performance of the battery is influenced; for another example, the maximum allowable output torque of the motor cannot be determined according to the discharge performance of the battery, and the battery cannot be guaranteed to operate in a normal discharge range; therefore, an accurate motor power-assisted torque value cannot be given only through signals such as the vehicle speed, the accelerator, the SOC value and the motor temperature, the normal operation of a battery cannot be guaranteed, the dynamic property and the smoothness of the vehicle are poor, and the driving performance of the vehicle is reduced.
Disclosure of Invention
The invention aims to provide a power-interruption-free gear shifting control method and a power-interruption-free gear shifting control system for a hybrid vehicle, which are used for solving the problem that the performance of the vehicle is influenced by inaccurate power-assisted torque value caused by unreasonable torque control of a motor of the conventional hybrid vehicle without power interruption during gear shifting.
In order to realize the unpowered interrupted gear shifting of the hybrid vehicle, the problem that the performance of the vehicle is affected because the assisting torque value is not accurate due to unreasonable torque control of the motor of the conventional hybrid vehicle without power interruption during gear shifting is solved. The invention provides a hybrid vehicle unpowered interruption gear shifting control method, which comprises the following steps:
1) acquiring a vehicle gear shifting signal, and judging whether the vehicle shifts according to the vehicle gear shifting signal;
2) if so, acquiring an engine output torque value at the moment before the gear shifting moment, the rotating speed of a driving motor at the gear shifting moment, the SOC of a battery at the gear shifting moment and a gear at the moment before the gear shifting moment;
3) determining a power-assisted torque value of a driving motor corresponding to the rotating speed of the driving motor at the gear shifting moment according to the rotating speed of the driving motor at the gear shifting moment, determining an SOC correction coefficient of the power-assisted torque value according to the SOC of a battery at the gear shifting moment, wherein the SOC of the battery is in a direct proportion relation with the SOC correction coefficient, determining a gear correction coefficient of the power-assisted torque value according to a gear at the previous moment, and the gear height is in an inverse proportion relation with the gear correction coefficient;
4) and obtaining a reduced power-assisted torque value according to the power-assisted torque value, the SOC correction coefficient and the gear correction coefficient, and taking the minimum value of the output torque value of the engine and the reduced power-assisted torque value as the actual power-assisted torque value of the driving motor to output until gear shifting is finished.
The method has the advantages that when the vehicle shifts gears, the actual power-assisted torque value of the driving motor is reasonably obtained according to the engine output torque value at the moment before the gear shifting moment, the rotating speed of the driving motor at the gear shifting moment, the SOC of the battery at the gear shifting moment and the gear at the moment before the gear shifting moment, power output during gear shifting is realized by controlling the driving motor to output the actual power-assisted torque value, power-free interruption gear shifting is realized, the torque value is accurately controlled, and the performance of the vehicle is improved.
Further, in order to prevent the motor torque value output from being higher than the maximum output torque value due to the wrong output of the power-assisted torque value caused by the system error and prolong the service life of the motor, the maximum output torque value of the driving motor at the gear shifting moment is determined according to the rotating speed of the driving motor at the gear shifting moment in the step 3), and the minimum value of the engine output torque value, the maximum output torque value and the reduced power-assisted torque value is taken as the actual power-assisted torque value of the driving motor in the step 4) to be output until the gear shifting is completed.
Further, in order to ensure that the battery operates in a normal discharge range, the maximum allowable discharge current of the battery and the voltage of the battery at the gear shifting moment are also obtained when the vehicle shifts gears, the maximum allowable discharge power of the battery is determined according to the maximum allowable discharge current of the battery and the voltage of the battery at the gear shifting moment, and then the maximum allowable output torque value is obtained according to the maximum allowable discharge power and the rotating speed of the driving motor at the gear shifting moment; and 4) taking the minimum value of the output torque value of the engine, the maximum output torque value, the reduced power-assisted torque value and the maximum allowable output torque value as the actual power-assisted torque value of the driving motor to output until the gear shifting is finished.
Furthermore, in order to enable the method to be applicable to vehicles with manual transmissions and accurately judge gear shifting signals, the vehicle gear shifting signals are determined according to the current-time vehicle speed, the previous-time accelerator pedal opening change rate, the current-time accelerator pedal opening, the current-time clutch pedal opening and the current-time gear; and when the vehicle speed at the current moment is greater than the set vehicle speed value, the accelerator pedal opening change rate at the previous moment is greater than the set change rate value, the accelerator pedal opening at the current moment is equal to zero, the clutch pedal at the current moment is stepped on, and the current moment is in a neutral gear, the vehicle is judged to be shifted.
Furthermore, in order to adapt to different motors and power batteries, the method is convenient to realize, the maximum output torque value and the power-assisted torque value are obtained by looking up a table according to the rotating speed of the driving motor at the gear shifting moment, the SOC correction coefficient is obtained by looking up a table according to the SOC of the battery at the gear shifting moment, and the gear correction coefficient is obtained by looking up a table according to the gear at the previous moment.
To facilitate the implementation of the above method, the present invention provides a hybrid vehicle non-power-interrupt shift control system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the program:
1) acquiring a vehicle gear shifting signal, and judging whether the vehicle shifts according to the vehicle gear shifting signal;
2) if so, acquiring an engine output torque value at the moment before the gear shifting moment, the rotating speed of a driving motor at the gear shifting moment, the SOC of a battery at the gear shifting moment and a gear at the moment before the gear shifting moment;
3) determining a power-assisted torque value of a driving motor corresponding to the rotating speed of the driving motor at the gear shifting moment according to the rotating speed of the driving motor at the gear shifting moment, determining an SOC correction coefficient of the power-assisted torque value according to the SOC of a battery at the gear shifting moment, wherein the SOC of the battery is in a direct proportion relation with the SOC correction coefficient, determining a gear correction coefficient of the power-assisted torque value according to a gear at the previous moment, and the gear height is in an inverse proportion relation with the gear correction coefficient;
4) the reduced power-assisted torque value is obtained according to the power-assisted torque value, the SOC correction coefficient and the gear correction coefficient, the minimum value of the engine output torque value and the reduced power-assisted torque value is taken as the actual power-assisted torque value of the driving motor to be output until gear shifting is completed, power output during gear shifting is achieved by controlling the driving motor to output the actual power-assisted torque value, power-free interruption gear shifting is achieved, the torque value is controlled accurately, and performance of a vehicle is improved.
Further, in order to prevent the motor torque value output from being higher than the maximum output torque value due to the wrong output of the power-assisted torque value caused by the system error and prolong the service life of the motor, the maximum output torque value of the driving motor at the gear shifting moment is determined according to the rotating speed of the driving motor at the gear shifting moment in the step 3) of the system, and the minimum value of the engine output torque value, the maximum output torque value and the reduced power-assisted torque value is taken as the actual power-assisted torque value of the driving motor in the step 4) to be output until the gear shifting is completed.
Further, in order to ensure that the battery operates in a normal discharge range, the system also controls the maximum allowable discharge current of the battery and the voltage of the battery at the gear shifting moment to be obtained when the vehicle shifts gears, determines the maximum allowable discharge power of the battery according to the maximum allowable discharge current of the battery and the voltage of the battery at the gear shifting moment, and then drives the motor to rotate at the gear shifting moment according to the maximum allowable discharge power to obtain a maximum allowable output torque value; and 4) taking the minimum value of the output torque value of the engine, the maximum output torque value, the reduced power-assisted torque value and the maximum allowable output torque value as the actual power-assisted torque value of the driving motor to output until the gear shifting is finished.
Furthermore, in order to enable the method to be suitable for vehicles with manual transmissions and accurately judge gear shifting signals, the vehicle gear shifting signals in the system are determined according to the current-time vehicle speed, the previous-time accelerator pedal opening change rate, the current-time accelerator pedal opening, the current-time clutch pedal opening and the current-time gear; and when the vehicle speed at the current moment is greater than the set vehicle speed value, the accelerator pedal opening change rate at the previous moment is greater than the set change rate value, the accelerator pedal opening at the current moment is equal to zero, the clutch pedal at the current moment is stepped on, and the current moment is in a neutral gear, the vehicle is judged to be shifted.
Furthermore, in order to adapt to different motors and power batteries, the method is convenient to realize, in the system, the maximum output torque value and the power-assisted torque value are obtained by looking up a table according to the rotating speed of the driving motor at the gear shifting moment, the SOC correction coefficient is obtained by looking up a table according to the SOC of the battery at the gear shifting moment, and the gear correction coefficient is obtained by looking up a table according to the gear at the previous moment.
Drawings
FIG. 1 is a schematic diagram of a hybrid vehicle non-power-interrupt shift control method of the present invention;
FIG. 2 is a schematic diagram of a hybrid vehicle non-power-interrupt shift control system of the present invention;
FIG. 3 is a schematic system configuration diagram of a hybrid vehicle of the present invention;
FIG. 4 is a flow chart of a method of determining gear shifting for a hybrid vehicle employing a manual transmission of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Method embodiment
The invention provides a hybrid vehicle unpowered interruption gear shifting control method, which comprises the following steps:
1) acquiring a vehicle gear shifting signal, and judging whether the vehicle shifts according to the vehicle gear shifting signal;
2) if so, acquiring an engine output torque value at the moment before the gear shifting moment, the rotating speed of a driving motor at the gear shifting moment, the SOC of a battery at the gear shifting moment and a gear at the moment before the gear shifting moment;
3) determining a maximum output torque value of a driving motor under the rotating speed of the driving motor at the gear shifting moment and a power-assisted torque value of the driving motor corresponding to the rotating speed of the driving motor at the gear shifting moment according to the rotating speed of the driving motor at the gear shifting moment, determining an SOC (state of charge) correction coefficient of the power-assisted torque value according to a battery SOC at the gear shifting moment, wherein the size of the battery SOC is in a direct proportion relation with the size of the SOC correction coefficient, determining a gear correction coefficient of the power-assisted torque value according to a gear at the previous moment, and the height of the gear is in;
4) and obtaining a reduced power-assisted torque value according to the power-assisted torque value, the SOC correction coefficient and the gear correction coefficient, and taking the minimum value of the output torque value of the engine, the maximum output torque value and the reduced power-assisted torque value as the actual power-assisted torque value of the driving motor to output until gear shifting is completed.
The invention provides a hybrid vehicle unpowered interrupt gear shifting control method, which can also remove part of the maximum output torque value to form a control method, wherein the control method can be used without the limitation of the maximum output torque value.
The method comprises the steps that the maximum allowable discharge current of a battery and the voltage of the battery at the gear shifting moment are also obtained when the vehicle shifts gears, the maximum allowable discharge power of the battery is determined according to the maximum allowable discharge current of the battery and the voltage of the battery at the gear shifting moment, and then the maximum allowable output torque value is obtained according to the maximum allowable discharge power and the rotating speed of a driving motor at the gear shifting moment; and 4) taking the minimum value of the output torque value of the engine, the maximum output torque value, the reduced power-assisted torque value and the maximum allowable output torque value as the actual power-assisted torque value of the driving motor to output until the gear shifting is finished.
Specifically, the basic flow of calculating the actual boost torque value is as follows, and the principle is shown in fig. 1:
①, calculating the actual output torque value of the engine at the previous moment, wherein the specific calculation method is the prior art and can be calculated by multiplying the actual output torque percentage of the engine by the reference torque.
②, obtaining the maximum output torque value of the motor under the motor speed according to the driving motor speed at the gear shifting moment by looking up the table 1.
③, acquiring the power-assisted torque value of the gear-shifting unpowered interrupt driving motor according to the rotating speed of the driving motor at the gear-shifting moment by looking up a table 2.
④, obtaining a battery SOC correction coefficient of the power-assisted torque value of the driving motor according to the battery SOC at the gear shifting time by looking up a table 3, wherein the SOC correction coefficient is mainly used for ensuring the battery SOC, the correction coefficient is small when the battery SOC is low, the power-assisted torque value of the motor is reduced, the correction coefficient is large when the battery SOC is high, the maximum is 1, and the power-assisted torque value of the motor is increased.
⑤, obtaining a gear correction coefficient of the motor power-assisted torque value according to the gear of the previous moment by looking up a table 4, wherein the gear correction coefficient is mainly used for ensuring the power-assisted effect and the battery performance, the vehicle speed is high when the vehicle is generally in a high gear, the rotating speed of the motor is high, if the motor power-assisted torque value is not corrected at the moment, the motor is output at the maximum power, and the SOC of the battery is consumed too fast to influence the battery performance.
⑥, the calculation module 1 multiplies the three values calculated in steps ③, ④ and ⑤ to obtain the motor folding assisting torque value.
The minimum value obtained by comparing the actual output torque value of the engine, the maximum output torque value and the reduced assist torque value can be used as the actual assist torque value of the driving motor, and the performance of the battery is considered to be reflected in the SOC and the SOC correction coefficient, so that the control requirement can be basically met only by judging according to the three torque values under the condition of not considering the discharge performance of the battery.
However, the following scheme is preferably included:
⑦, obtaining the maximum allowable discharge power of the battery by multiplying the maximum allowable discharge current of the battery and the voltage of the battery at the gear shifting moment through the calculation module 2, and obtaining the maximum allowable output driving torque value under the maximum allowable discharge current of the battery by dividing the maximum allowable discharge power of the battery by the rotating speed of the motor according to the calculation module 3.
⑧, the calculation module 4 compares the torque values calculated in steps ①, ②, ⑥ and ⑦, and the minimum value is the actual assisting torque value of the unpowered interrupt driving motor.
The maximum output torque value and the power-assisted torque value are respectively obtained by looking up a table 1 and a table 2 according to the rotating speed of the driving motor at the gear shifting moment, the SOC correction coefficient is obtained by looking up a table 3 according to the SOC of the battery at the gear shifting moment, and the gear correction coefficient is obtained by looking up a table 4 according to the gear at the previous moment, wherein the tables 1, 2, 3 and 4 are calibrated by real vehicles, and the corresponding tables of the power batteries, the driving motors and the like of different models are different.
The calibration basis of the table 1 is obtained by motor characteristic test and is determined by a motor structure, electrical parameters and the like; the calibration basis of the table 2 is that the motor power-assisted torque value ensures no power interruption in the whole vehicle gear shifting process, and simultaneously the whole vehicle comfort is ensured, wherein a group of table lookup values are given firstly, and the table values are optimized according to a real vehicle experiment, the whole vehicle comfort is judged by the change of the acceleration of the vehicle at the gear shifting moment, the smaller the change of the acceleration is, the higher the comfort is, and the problems of break-through, shaking and the like of the whole vehicle are avoided; the calibration basis of the table 3 is to control the battery SOC to be in the optimal interval, reduce the coefficient when the battery SOC is too low, increase the coefficient when the battery SOC is too high, always ensure that the battery SOC is in the optimal interval, and avoid the battery over-discharge and influence on the service life of the battery; and 4, the calibration is carried out by the real vehicle experiment according to the principle that the larger the gear is, the smaller the coefficient is, so that the battery consumption is prevented from being too fast.
System embodiment
The control module comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, the steps in the method embodiment are realized when the processor executes the program, and the control module only needs to carry out information acquisition by arranging a corresponding input interface and carry out control signal output by arranging a corresponding output interface.
In addition, as shown in fig. 2, the control module of the hybrid vehicle unpowered-interrupt gear-shifting control system provided by the invention can be a vehicle control unit, and the vehicle control unit is used for acquiring signals required in the method embodiment and outputting the signals to the motor controller for controlling the motor.
Vehicle embodiment
The invention provides a vehicle, which comprises a hybrid power system, as shown in fig. 3, the system comprises an engine, a clutch, a gearbox, a motor, a power battery, a vehicle control unit and a motor controller, and the arrangement mode of the vehicle power system comprises the engine, the clutch, the gearbox, the motor, a rear axle and wheels in sequence.
The gearbox can be an automatic gearbox or a manual gearbox, and when the manual gearbox shifts gears, as shown in fig. 4, the manual gearbox is determined according to the current-time vehicle speed, the previous-time accelerator pedal opening change rate, the current-time accelerator pedal opening, the current-time clutch pedal opening and the current-time gear; and when the vehicle speed at the current moment is greater than the set vehicle speed value, the accelerator pedal opening change rate at the previous moment is greater than the set change rate value, the accelerator pedal opening at the current moment is equal to zero, the clutch pedal at the current moment is stepped on, and the current moment is in a neutral gear, the vehicle is judged to be shifted.
1. Firstly, judging whether the vehicle speed is greater than or equal to A, if so, executing the step 2, otherwise, ending;
2. judging whether the accelerator pedal opening change rate in the previous unit time is greater than or equal to B, if so, executing the step 3, otherwise, ending;
3. judging whether the opening degree of the accelerator pedal in the next unit time is constantly equal to 0, if so, executing the step 4, otherwise, ending;
4. judging whether the clutch pedal is pressed down in the next unit time, if so, executing the step 5, otherwise, ending;
5. judging whether the gear in the next unit time is in a neutral gear, if so, executing the step 6, otherwise, ending;
6. and (6) entering motor power-assisted calculation.
The vehicle speed A can be calibrated according to different vehicle types and different power configurations.
The present invention has been described in relation to particular embodiments thereof, but the invention is not limited to the described embodiments. The technical means in the above embodiments are changed, replaced, modified in a manner that will be easily imaginable to those skilled in the art, and the functions of the technical means are substantially the same as those of the corresponding technical means in the present invention, and the objectives of the invention are also substantially the same, so that the technical solution formed by fine tuning the above embodiments still falls into the protection scope of the present invention.
Claims (10)
1. A hybrid vehicle unpowered interrupt shift control method is characterized by comprising the following steps:
1) acquiring a vehicle gear shifting signal, and judging whether the vehicle shifts according to the vehicle gear shifting signal;
2) if so, acquiring an engine output torque value at the moment before the gear shifting moment, the rotating speed of a driving motor at the gear shifting moment, the SOC of a battery at the gear shifting moment and a gear at the moment before the gear shifting moment;
3) determining a power-assisted torque value of a driving motor corresponding to the rotating speed of the driving motor at the gear shifting moment according to the rotating speed of the driving motor at the gear shifting moment, determining an SOC correction coefficient of the power-assisted torque value according to the SOC of a battery at the gear shifting moment, wherein the SOC of the battery is in a direct proportion relation with the SOC correction coefficient, determining a gear correction coefficient of the power-assisted torque value according to a gear at the previous moment, and the gear height is in an inverse proportion relation with the gear correction coefficient;
4) and obtaining a reduced power-assisted torque value according to the power-assisted torque value, the SOC correction coefficient and the gear correction coefficient, and taking the minimum value of the output torque value of the engine and the reduced power-assisted torque value as the actual power-assisted torque value of the driving motor to output until gear shifting is finished.
2. The method for controlling a hybrid vehicle without power interruption according to claim 1, wherein in step 3), the maximum output torque value of the driving motor at the rotation speed of the driving motor at the shifting moment is further determined according to the rotation speed of the driving motor at the shifting moment, and in step 4), the minimum value among the engine output torque value, the maximum output torque value and the reduced power-assisted torque value is taken as the actual power-assisted torque value of the driving motor for outputting until the shifting is completed.
3. The hybrid vehicle unpowered interrupted shift control method according to claim 2, characterized in that a maximum allowed discharge current of the battery and a battery voltage at the shift time are also obtained when the vehicle is shifted, the maximum allowed discharge power of the battery is determined according to the maximum allowed discharge current of the battery and the battery voltage at the shift time, and then a maximum allowed output torque value is obtained according to the maximum allowed discharge power and the rotation speed of the driving motor at the shift time; and 4) taking the minimum value of the output torque value of the engine, the maximum output torque value, the reduced power-assisted torque value and the maximum allowable output torque value as the actual power-assisted torque value of the driving motor to output until the gear shifting is finished.
4. The hybrid vehicle unpowered interrupted shift control method according to claim 3, wherein the vehicle shift signal is determined according to a current-time vehicle speed, a previous-time accelerator pedal opening change rate, a current-time accelerator pedal opening, a current-time clutch pedal opening, and a current-time gear; and when the vehicle speed at the current moment is greater than the set vehicle speed value, the accelerator pedal opening change rate at the previous moment is greater than the set change rate value, the accelerator pedal opening at the current moment is equal to zero, the clutch pedal at the current moment is stepped on, and the current moment is in a neutral gear, the vehicle is judged to be shifted.
5. The method according to claim 4, wherein the maximum output torque value and the power-assisted torque value are both obtained from a look-up table of the rotational speed of the driving motor at the time of shifting, the SOC correction factor is obtained from a look-up table of the SOC of the battery at the time of shifting, and the gear correction factor is obtained from a look-up table of the gear at the previous time.
6. A hybrid vehicle non-power-interrupt shift control system comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor when executing the program implements the steps of:
1) acquiring a vehicle gear shifting signal, and judging whether the vehicle shifts according to the vehicle gear shifting signal;
2) if so, acquiring an engine output torque value at the moment before the gear shifting moment, the rotating speed of a driving motor at the gear shifting moment, the SOC of a battery at the gear shifting moment and a gear at the moment before the gear shifting moment;
3) determining a power-assisted torque value of a driving motor corresponding to the rotating speed of the driving motor at the gear shifting moment according to the rotating speed of the driving motor at the gear shifting moment, determining an SOC correction coefficient of the power-assisted torque value according to the SOC of a battery at the gear shifting moment, wherein the SOC of the battery is in a direct proportion relation with the SOC correction coefficient, determining a gear correction coefficient of the power-assisted torque value according to a gear at the previous moment, and the gear height is in an inverse proportion relation with the gear correction coefficient;
4) and obtaining a reduced power-assisted torque value according to the power-assisted torque value, the SOC correction coefficient and the gear correction coefficient, and taking the minimum value of the output torque value of the engine and the reduced power-assisted torque value as the actual power-assisted torque value of the driving motor to output until gear shifting is finished.
7. The system according to claim 6, wherein the maximum output torque of the driving motor at the rotation speed of the driving motor at the shifting moment is determined according to the rotation speed of the driving motor at the shifting moment in step 3), and the minimum value among the engine output torque, the maximum output torque and the reduced power-assisted torque is taken as the actual power-assisted torque of the driving motor in step 4) for outputting until the shifting is completed.
8. The hybrid vehicle unpowered interrupt shift control system according to claim 7, wherein a maximum allowed discharge current of the battery and a battery voltage at a shift time are also obtained when the vehicle is shifted, a maximum allowed discharge power of the battery is determined according to the maximum allowed discharge current of the battery and the battery voltage at the shift time, and a maximum allowed output torque value is obtained according to the maximum allowed discharge power and a rotation speed of the driving motor at the shift time; and 4) taking the minimum value of the output torque value of the engine, the maximum output torque value, the reduced power-assisted torque value and the maximum allowable output torque value as the actual power-assisted torque value of the driving motor to output until the gear shifting is finished.
9. The hybrid vehicle unpowered interrupted shift control system according to claim 8, wherein the vehicle shift signal is determined from a current time vehicle speed, a previous time accelerator pedal opening change rate, a current time accelerator pedal opening, a current time clutch pedal opening, and a current time gear; and when the vehicle speed at the current moment is greater than the set vehicle speed value, the accelerator pedal opening change rate at the previous moment is greater than the set change rate value, the accelerator pedal opening at the current moment is equal to zero, the clutch pedal at the current moment is stepped on, and the current moment is in a neutral gear, the vehicle is judged to be shifted.
10. The hybrid vehicle unpowered interrupted shift control system of claim 9 wherein the maximum output torque value and the boost torque value are both derived from a look-up table of drive motor speeds at the time of the shift, the SOC correction factor is derived from a look-up table of battery SOC at the time of the shift, and the gear correction factor is derived from a look-up table of gear at a previous time.
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| CN201811296779.0A CN111120644B (en) | 2018-11-01 | 2018-11-01 | Power-interruption-free gear shifting control method and system for hybrid vehicle |
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| CN201811296779.0A CN111120644B (en) | 2018-11-01 | 2018-11-01 | Power-interruption-free gear shifting control method and system for hybrid vehicle |
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| CN111120644A true CN111120644A (en) | 2020-05-08 |
| CN111120644B CN111120644B (en) | 2021-05-25 |
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| CN113565952A (en) * | 2021-07-07 | 2021-10-29 | 山东元齐新动力科技有限公司 | Gear shifting force correction control method and system for AMT (automated mechanical transmission) gearbox of new energy automobile |
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| CN117685361A (en) * | 2024-02-04 | 2024-03-12 | 潍柴动力股份有限公司 | Gear shifting control method and device of AMT gear box system, vehicle and storage medium |
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