CN117141456A - Extended range electric vehicle control method, storage medium and system - Google Patents
Extended range electric vehicle control method, storage medium and system Download PDFInfo
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- NTHFOQKLSZUQTR-OICFXQLMSA-N (4r)-4-[(3r,5s,7r,8r,9s,10s,13r,14s,17r)-3,7-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1h-cyclopenta[a]phenanthren-17-yl]pentanoic acid;sulfuric acid Chemical compound OS(O)(=O)=O.C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)CC1 NTHFOQKLSZUQTR-OICFXQLMSA-N 0.000 abstract 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
- B60W20/16—Control strategies specially adapted for achieving a particular effect for reducing engine exhaust emissions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
- B60W20/17—Control strategies specially adapted for achieving a particular effect for noise reduction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
Abstract
The invention discloses a control method, a storage medium and a system of an extended range electric automobile, wherein the method firstly obtains operation parameter data of the electric automobile, including SOC, automobile speed, whole automobile required power, driving motor rotating speed and driving motor peak torque; then, according to the opening degree of an accelerator pedal, the rotating speed of a driving motor and the peak torque of the driving motor, analyzing the required power of the target extended-range electric vehicle; in order to ensure that the power battery of the target range-extending automobile in the CD mode cannot be shortened in endurance mileage and damage the service life of the battery due to excessively rapid discharge, the problem that the discharge power cannot meet the current power performance requirement when the power battery is reduced is avoided. In the CDCS, the endurance mileage of the target extended-range electric vehicle in the CD stage is improved by adding a threshold value SOC_e; and adjusting a target working point of the target extended range electric automobile according to the parameters such as the required power, the SOC, the speed and the like, so that the running state of the whole automobile is realized, and the working state of the whole automobile is adjusted.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a range-extending electric vehicle control method, a storage medium and a system.
Background
The biggest problem of pure electric vehicles is short driving mileage and frequent charging. To solve this problem, range extender technology has been developed. When the electric quantity of the battery of the vehicle provided with the range extender is insufficient, the engine can be started to provide additional power output for the electric vehicle, so that the driving mileage is prolonged. The range extender technology has the advantage of lower cost than other methods of addressing the mileage deficiency. By adopting the range extender technology, people can realize the increase of the driving mileage while fully playing the advantages and economy of the electric automobile, thereby improving the use experience of users.
In hybrid vehicles, the main advantage of the range extender is to completely decouple the engine from the vehicle's transmission, thereby improving thermal efficiency and effectively reducing the electric vehicle's shortfall during long distance travel. However, to fully achieve the efficacy of range extenders, conventional rule-based control methods have presented difficulties in the vehicle energy distribution process. For example, a thermostat control strategy may reduce battery life, while a power following scheme may affect vehicle economy and harshness (NVH, noise, vibration, harshness) evaluations.
Therefore, solving the limitation problem faced by the conventional rule-based control strategy has become a technical problem, and effective solutions need to be researched and explored.
Disclosure of Invention
In order to solve the problems caused by the conventional control technology, the invention provides a power consumption maintenance strategy, a control method and a storage medium of a range extender type automobile, and aims to improve the economy of the whole automobile and reduce the influence of the range extender on the vehicle sound vibration roughness while protecting the service life of a battery.
The invention adopts the following technical scheme.
In order to ensure that a power battery of a target extended-range automobile in a (Charge depoleting) mode cannot shorten the endurance mileage and damage the service life of the battery due to excessively fast discharge, the method also avoids that the discharge power cannot meet the current power performance requirement when the power battery is in a reduced power consumption. First, referring to fig. 1, in the power consumption maintenance strategy (CDCS, charge Depleting and Charge Sustaining), in order to better control the SOC of the power battery, it is necessary to increase an soc_e threshold value on the basis of a lower threshold value soc_low of the SOC. The method specifically comprises the following steps:
step 1: the whole Vehicle Controller (VCU) can comprehensively consider various driving parameters of the extended range vehicle, including the power battery capacity (SOC), the vehicle speed, the required power of the whole vehicle and the equivalent oil consumption under different working modes, and can enable the whole vehicle to be in the working mode with the lowest equivalent oil consumption on the premise of protecting the service life of the battery, reducing NVH and the like. The strategy is beneficial to improving the equivalent oil consumption of the hybrid electric vehicle under the full working condition and enhancing the economical efficiency of the range-extended automobile.
Step 2: the method sets a plurality of items aiming at a range extender control strategy. First, the thermal efficiency of the engine in the range extender is set to be divided into relatively high efficiency sections, with upper and lower limits of p_high and p_low, respectively. Secondly, a high power point P1 is set to ensure enough power performance;
step 3: the output power of the range extender needs to be determined by considering the power battery charge quantity SOC, the vehicle speed and the whole vehicle required power. Judging the magnitude relation between the current SOC value and the set value SOC_e, if the current SOC value is higher than the SOC_e, jumping to the fourth step, and if the current SOC value is lower than the SOC_e, jumping to the fifth step;
step 4: the range extender is not started and the range extender automobile operates in an Electric Vehicle (EV) mode of operation.
Step 5: judging the magnitude relation between the current SOC value and the set value SOC_low, if the current SOC value is higher than the SOC_low, jumping to the step 6, and if the current SOC value is lower than the SOC_low, jumping to the step seventh;
the step 6 of controlling the power point of the range extender specifically comprises the following steps:
firstly, a range extender is not started, and the range extender automobile runs in a pure electric operation mode;
when the required power of the whole vehicle exceeds a power point P_4C corresponding to the discharge multiplying power of the power battery of 4C, starting the range extender and operating at a maximum power point P_high in a high-efficiency interval;
when the vehicle speed exceeds a V1 threshold value, starting the range extender and operating at a power point P_low;
the range extender power point control in step 7 specifically includes the following steps:
firstly, starting a range extender Cheng Qihou to operate with the most power generation, requesting power generation P_req=PgenMin by the VCU, and then sending a power request to an APU of the range extender according to load consumption by the VCU, wherein the power generation request value P_req is smaller than the maximum available power generation PgenMax of the range extender;
when the required power of the whole vehicle, namely P_req, is smaller than the lower limit value P_low of the high-efficiency interval of the engine, the range extender works at the minimum power point P_low of the high-efficiency interval to operate;
when the whole vehicle demand power, namely P_req, is in a high heat efficiency zone [ P_low, P_high ] of the engine, controlling the engine output torque of the range extender to correspondingly change along with the whole vehicle demand power;
when the required power P_req of the whole vehicle is larger than the upper limit value P_high of the high-efficiency section of the engine, if the required power of the whole vehicle is smaller than the power point P_4C corresponding to the discharge multiplying power of the power battery at the moment, the engine in the range extender works at the maximum power point P_high of the high-efficiency section. Otherwise, the engine in the range extender will output the setpoint power p_1.
The invention integrates the range extender control strategy into the whole Vehicle Controller (VCU). The VCU is responsible for the tasks of power-on and power-off control of the whole vehicle, intention analysis of a driver, torque control, energy management, fault management of the whole vehicle and the like, and the method aims to ensure that the range extender system works in an optimal efficiency interval as much as possible on the premise of meeting the power performance and battery protection conditions of the whole vehicle. Meanwhile, the power following operation condition of the range extender under the special working condition is considered, and the engine output torque of the range extender is controlled to follow the corresponding change of the required power of the whole vehicle. Compared with the conventional mode of realizing power following by changing the rotation speed of the engine, the method can reduce noise and vibration caused by increasing the Cheng Qizhong engine and ensure that the increase Cheng Gonglv meets the output requirement.
The invention has the beneficial effects that:
the technical scheme provided by the embodiment of the invention has at least the following technical effects or advantages:
1. in a power consumption and power maintenance strategy (CDCS), an SOC_low lower limit threshold is set, and an SOC_e threshold is added above the SOC_low limit threshold, so that the problems of shortened endurance mileage and battery life damage caused by too fast power consumption of a vehicle in a CD mode are avoided, and the endurance mileage of a target range-extended automobile in a CD stage is prolonged to a certain extent. Each driving parameter of the target extended range vehicle is comprehensively considered through a Vehicle Controller (VCU) to obtain the vehicle speed, the SOC and the vehicle required power;
2. to avoid the engine in the range extender operating in a low efficiency zone, upper and lower limits of a relatively high efficiency zone of the preset engine are adopted, namely P_low and P_high respectively. The measures can maintain the engine in a high-efficiency interval as much as possible in the running process of the range extender, and reduce the consumption and emission of fuel;
3. when the target range extender automobile required power is in a relatively high-efficiency interval of the engine in the range extender, a fixed-point power following mode is adopted, namely the engine output torque of the range extender is controlled to correspondingly change along with the increase Cheng Gonglv. Compared with the conventional mode of realizing power following by changing the rotation speed of the engine, the method can reduce noise and vibration caused by increasing the Cheng Qizhong engine and ensure that the increase Cheng Gonglv meets the output requirement;
4. meanwhile, as shown in fig. 3, in order to avoid high-power discharge and deep discharge phenomenon of the power battery under the condition of low point quantity, a high-power point P1 is added to the engine in the range extender so as to ensure enough power performance;
in summary, the objective of the present invention is to ensure that the range extender system works in the optimal efficiency interval as much as possible and reduce the NVH effect of the engine in the range extender by satisfying the precondition of the vehicle power performance and the battery protection condition. The innovative design and control strategy can improve the efficiency of the power system, optimize the driving experience and comfort, and prolong the service life of the power battery.
Drawings
In order to more clearly describe the technical solution of the embodiments of the present invention, the following briefly describes the drawings that are required to be used in the embodiments of the present invention:
FIG. 1 is a schematic diagram of an improved power consumption maintenance strategy (CDCS) provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of an overall flow of a range-extending automobile control method according to an embodiment of the present invention;
FIG. 3 is a graph of a cloud cover of up Cheng Gonglv for multi-mode switching based on logic thresholds according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a target operating point adjustment process according to an embodiment of the present invention.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.
In order to ensure the health and performance of the power battery of the target extended-range vehicle in the Charge mapping (CD) mode, a certain strategy needs to be adopted when controlling the battery SOC. For this problem, in the following embodiments:
1. referring to fig. 1, in a power consumption maintenance strategy (CDCS), a lower limit threshold of soc_low is set, and an soc_e threshold is increased above the lower limit threshold, so as to avoid problems of shortening of endurance mileage and damage of battery life caused by too fast power consumption of a vehicle in a CD mode;
2. in the range between SOC_low and SOC_e, a control method based on speed and target range-increasing automobile required power is adopted to meet the power performance requirement of the automobile, and meanwhile, the discharging power of a battery is limited to prolong the service life of the battery.
Fig. 2 shows the overall flow of the extended range electric vehicle control method provided by the invention.
FIG. 3 is a graph of an augmented Cheng Gonglv cloud for multi-mode switching based on logic thresholds provided by an embodiment of the present invention; fig. 4 is a schematic diagram of a target operating point adjustment procedure according to an embodiment of the present invention.
In order to protect the service life of a battery, reduce noise and make a range extender in an optimal working state at the same time and optimize the economy of the whole vehicle, the invention provides a range-extending electric automobile control method, which is shown by referring to fig. 2, and comprises the following steps as an embodiment:
step S1, acquiring target extended range automobile operation parameter data according to a Vehicle Control Unit (VCU), wherein the operation parameter data comprise power battery electric quantity SOC, vehicle speed, driving motor rotating speed and peak torque of a driving motor.
In one possible implementation manner, the power battery power SOC in the operation parameter data of the target extended-range automobile can be estimated by a battery management system (BMS, battery Management System) through the information of the single battery of each component part collected by the sampling circuit in real time, and is read by a Vehicle Controller (VCU) through CAN (Controller Area Network) communication; the vehicle speed can be obtained through calculation by an automobile speed sensor or according to an automobile wheel speed sensor; the opening of the accelerator pedal can be obtained through an accelerator pedal position sensor; the rotation speed of the driving motor can be obtained through a rotation speed sensor; the peak torque of the drive motor is determined by its design parameters.
And S2, calculating the range-extending type automobile required power according to the opening degree of the accelerator pedal, the rotating speed of the driving motor and the peak torque of the driving motor.
In one possible implementation, the vehicle demand power can be calculated by the following formula: required power = accelerator pedal opening x current drive motor speed x drive motor peak torque. The real-time power requirement of the target extended range electric automobile can be obtained by using the formula, so that the target working point can be analyzed and adjusted in time, and the overall economy of the automobile can be improved;
step S3, respectively setting an electric quantity SOC of a power battery, upper and lower limit thresholds P_high and P_low of a relatively high efficiency section of an engine in a range extender and a high power point P1;
and S4, dynamically adjusting the target working point of the range-extending automobile according to the SOC, the automobile speed V and the whole automobile required power P_req.
Examples
The following specifically describes how to implement the control method according to the present invention with reference to SOC when the vehicle is controlled with reference to fig. 4.
In this embodiment, the soc_low takes a value of 0.2 and the soc_e takes a value of 0.5; the P_4c takes on the value 125kw, the P_high takes on the value 120kw and the P1 takes on the value 130kw; the value of V_1 is 5m/s.
Step 1: firstly, the whole vehicle driving mode of a driver needs to be identified, and judgment is carried out based on the electric quantity SOC of a whole vehicle battery to determine whether the range extender needs to be started. Referring specifically to fig. 4, a magnitude relation between the current SOC value and the set value soc_e is determined. When the electric quantity of the target extended range automobile is higher than a preset value SOC_e, jumping to the step 2, and if the electric quantity is lower than the SOC_e, jumping to the step 3;
step 2: because the power battery has sufficient electric quantity and the discharge power is enough to meet the electric energy requirement of the whole vehicle required power, the range extender is not started, and the target range extender electric vehicle can always operate in a pure electric operation mode and has the advantages of energy conservation and emission reduction of the whole vehicle.
Step 3: judging the magnitude relation between the current SOC value and the set value SOC_low, when the electric quantity of the target extended range automobile is higher than the preset value SOC_low, jumping to the step 4, and if the electric quantity is lower than the SOC_low, jumping to the step 5;
step 4: judging whether the required power of the target extended-range automobile exceeds a power point P_4c corresponding to the power battery discharge multiplying power of 4C, if so, jumping to the step 6, and if not, jumping to the step 7;
step 5: starting a range extender, judging whether the required power of a target range extender automobile is smaller than the lower limit value P_low of a relatively high-efficiency interval of an engine in the Yu Zengcheng device, if yes, jumping to the step 9, and if not, jumping to the step 10;
step 6: the power battery discharge multiplying power can be reduced because of the decline of SOC, in order to avoid power battery electric quantity can cause harm to its life because of discharge multiplying power is too big, and range extender starts to work at the high-efficient interval's maximum power point P_high operation.
Step 7: judging whether the speed of the target extended range automobile is greater than a threshold V_1 of a preset value, if so, jumping to the step 8, and if not, jumping back to the step 2;
step 8: to maximize the battery drain phase, the range extender is started and the engine will operate at power point p_low. The mode can share part of power for the power battery and can avoid the phenomenon of charging the power battery in the consumption stage of the battery electric quantity;
step 9: in order to avoid the excessive oil consumption of the engine in the low-efficiency area, the engine power is operated at the P_low point. In addition to providing a power source to the drive motor, the excess energy may also be charged to the power battery. The fuel consumption is saved, and the problem that the power battery electric quantity of the engine can fluctuate greatly when the engine is at the optimal working point is avoided.
Step 10: whether the required power of the target extended-range automobile is smaller than the upper limit value P_high of the relatively high-efficiency section of the engine in the Yu Zengcheng device is judged. If yes, jumping to the step 11, if not, jumping to the step 12;
step 11: in order to avoid the phenomenon of poor NVH performance caused by the conventional mode of realizing power following by changing the rotation speed of an engine, the invention correspondingly changes the required power of the whole vehicle by controlling the output torque of the engine of the range extender;
step 12: judging whether the required power of the target extended-range automobile is smaller than a power point P_4c corresponding to the power battery discharge multiplying power of 4C, if so, jumping to the step 13, and if not, jumping to the step 14;
step 13: the engine in the range extender will operate at an upper limit value p_high of the relatively high efficiency interval, with the remaining power being provided by the power battery.
Step 14: to avoid high power and deep discharge in the event of low power battery, the engine output power in the range extender will be at the P1 operating point, at which time economy is not considered.
The technical scheme provided by the embodiment of the invention has at least the following technical effects or advantages:
1. in a power consumption and power maintenance strategy (CDCS), an SOC_low lower limit threshold is set, and an SOC_e threshold is added above the SOC_low limit threshold, so that the problems of shortened endurance mileage and battery life damage caused by too fast power consumption of a vehicle in a CD mode are avoided, and the endurance mileage of a target range-extended automobile in a CD stage is prolonged to a certain extent.
And (3) comprehensively considering various driving parameters of the target extended range vehicle through a Vehicle Controller (VCU) to obtain the vehicle speed, the SOC and the vehicle required power.
2. To avoid the engine in the range extender operating in a low efficiency zone, upper and lower limits of a relatively high efficiency zone of the preset engine are adopted, namely P_low and P_high respectively. The measures can maintain the engine in a high-efficiency interval as much as possible in the running process of the range extender, and reduce the consumption and emission of fuel;
3. when the target range extender automobile required power is in a relatively high-efficiency interval of the engine in the range extender, a fixed-point power following mode is adopted, namely, the engine output torque of the range extender is controlled to follow the corresponding change of the range extender Cheng Gonglv. Compared with the conventional mode of realizing power following by changing the rotation speed of the engine, the method can reduce noise and vibration caused by increasing the Cheng Qizhong engine and ensure that the increase Cheng Gonglv meets the output requirement.
4. Meanwhile, as shown in fig. 3, in order to avoid high-power discharge and deep discharge phenomenon of the power battery under the condition of low point quantity, a high-power point P1 is added to the engine in the range extender so as to ensure enough power performance.
In summary, the objective of the present invention is to ensure that the range extender system works in the optimal efficiency interval as much as possible and reduce the NVH effect of the engine in the range extender by satisfying the precondition of the vehicle power performance and the battery protection condition. The innovative design and control strategy can improve the efficiency of the power system, optimize the driving experience and comfort, and prolong the service life of the power battery.
Claims (10)
1. The method for controlling the extended range electric automobile is characterized by comprising the following steps of:
step 1: setting a lower limit threshold value SOC_low, adding a threshold value SOC_e above the SOC_low, judging the magnitude relation between the current SOC value and a set value SOC_e, jumping to the step 2 when the electric quantity of the target range-extending automobile is higher than the preset value SOC_e, and jumping to the step 3 if the electric quantity of the target range-extending automobile is lower than the SOC_e;
step 2: the range extender is not started;
step 3: judging the magnitude relation between the current SOC value and the set value SOC_low, and if the current SOC value is higher than the preset value SOC_low, jumping to the step 4; if the value is lower than SOC_low, jumping to the step 5;
step 4: judging whether the required power of the target extended-range automobile exceeds a power point P_4c corresponding to the power battery discharge multiplying power of 4C, if so, jumping to the step 6, otherwise jumping to the step 7;
step 5: starting a range extender, judging whether the required power of a target range extender automobile is smaller than the lower limit value P_low of a relatively high-efficiency interval of an engine in the Yu Zengcheng device, if yes, jumping to the step 9, otherwise jumping to the step 10;
step 6: the range extender is started and works at a maximum power point P_high in the high-efficiency interval;
step 7: judging whether the speed of the target extended range automobile is greater than a threshold V_1 of a preset value, if so, jumping to the step 8, otherwise jumping back to the step 2;
step 8: the range extender is started, and the engine works in a power point P_low mode;
step 9: the engine works in a mode of a power point P_low;
step 10: judging whether the required power of the target extended range automobile is smaller than P_high, if so, jumping to the step 11, otherwise jumping to the step 12;
step 11: the output torque of the engine of the range extender is controlled to correspondingly change along with the required power of the whole vehicle;
step 12: judging whether the required power of the target extended-range automobile is smaller than a power point P_4c corresponding to the power battery discharge multiplying power of 4C, if so, jumping to a step 13, otherwise jumping to a step 14;
step 13: the engine works in a power point P_high mode, and the residual power is provided by a power battery;
step 14: the engine operates in the manner of power point P1.
2. The control method according to claim 1, characterized in that:
the soc_low is 0.2.
3. The control method according to claim 1, characterized in that:
soc_high is 0.6.
4. The control method according to claim 1, characterized in that:
soc_e is 0.5.
5. The control method according to claim 1, characterized in that:
the P_4c is 47kw.
6. The control method according to claim 1, characterized in that:
the P_high is 45kw.
7. The control method according to claim 1, characterized in that:
the P1 is 50kw.
8. The control method according to claim 1, characterized in that:
the V_1 is 5m/s.
9. A computer-readable storage medium having stored thereon a computer program, characterized in that the program is executed by a processor to realize the steps of a range-extending electric vehicle control method according to any one of claims 1 to 8.
10. An extended range electric vehicle control system comprising a vehicle controller VCU, wherein the vehicle controller VCU comprises the computer readable storage medium of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311185089.9A CN117141456A (en) | 2023-09-14 | 2023-09-14 | Extended range electric vehicle control method, storage medium and system |
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| CN117681856A (en) * | 2024-02-04 | 2024-03-12 | 西南交通大学 | Energy management control method based on whole vehicle torque demand and electric quantity state |
| CN117681856B (en) * | 2024-02-04 | 2024-05-07 | 西南交通大学 | Energy management control method based on whole vehicle torque demand and electric quantity state |
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