CN110539744B - Low-speed driving mode switching control method for power split type hybrid vehicle - Google Patents
Low-speed driving mode switching control method for power split type hybrid vehicle Download PDFInfo
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
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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
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/021—Clutch engagement state
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/18—Braking system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a low-speed driving mode switching control method of a power split type hybrid vehicle, which comprises the steps of pre-charging a second clutch, controlling the second clutch to slide and drag the engine when the pre-charging of the second clutch is finished and the rotating speed difference between the engine and a second motor is within a set interval C, controlling the second clutch to reduce the transmission torque to 0 when the rotating speed of the engine exceeds a set threshold D, controlling the pressure of the second clutch to reduce to a pressure value corresponding to a kisssoint state, controlling the engine to start oil injection when the rotating speed of the engine is reduced to a set threshold E, increasing the rotating speed of the engine by controlling the torque required by the engine, controlling the second clutch to transmit the torque to enable the rotating speed of the engine to gradually approach the rotating speed of the second motor when the rotating speed difference between the engine and the second motor is greater than a set threshold F, and controlling the second clutch to transmit the rotating speed to gradually approach the rotating speed of the second motor when the absolute, and controlling the second clutch to close. The method is simple and feasible and can meet the power requirement.
Description
Technical Field
The invention relates to the field of control of hybrid vehicles, in particular to a low-speed driving mode switching control method of a power split type hybrid vehicle.
Background
In the driving process of the hybrid electric vehicle, the hybrid electric vehicle can be switched between hybrid power driving modes or pure battery driving modes according to different conditions, and can also be switched from the hybrid power driving mode to the pure electric driving mode, for different hybrid power transmission systems, mode switching control methods can be different, for a power split type hybrid electric vehicle, when the vehicle starts at a high torque and a low speed, the vehicle needs to be switched from the pure electric driving mode to the hybrid power driving mode with the maximum output torque, so as to obtain better starting power performance or climbing power performance, and under the condition, how to control the switching steps can ensure that the vehicle is smoother in the driving mode switching process while meeting the power, improve the driving safety and the comfort, and become a research direction of the hybrid electric vehicle.
Disclosure of Invention
The invention aims to provide a low-speed driving mode switching control method of a power split type hybrid vehicle, which is simple and feasible, meets the power requirement in the driving mode switching process, and has the advantages of smooth vehicle, high driving safety and high comfort.
The invention is realized by the following scheme:
a power split type hybrid vehicle low-speed driving mode switching control method is characterized in that when a vehicle is in an EV-1 driving mode, a vehicle control unit judges whether a user needs to switch the low-speed driving mode, if yes, a first brake B1 is kept locked, and the method comprises the following steps:
s1: the vehicle control unit pre-charges the second clutch C2, and executes step S2 when the pre-charging of the second clutch C2 is completed and the rotation speed difference between the engine and the second electric machine EM2 is within the set interval C;
s2: the vehicle control unit controls the second clutch C2 to slip and drag the engine, and when the engine speed exceeds a set threshold D, the vehicle control unit executes the step S3;
s3: the vehicle controller controls the torque transmitted by the second clutch C2 to be reduced to 0 according to a certain gradient Delta V, controls the pressure of the second clutch C2 to be reduced to a pressure value corresponding to the kisreceipt state, and executes the step S4 when the rotating speed of the engine is reduced to a set threshold value E which is smaller than a set threshold value D;
s4: the vehicle control unit controls the engine to start oil injection, increases the rotating speed of the engine by controlling the torque required by the engine, and executes the step S5 when the rotating speed difference between the engine and the second motor EM2 is larger than a set threshold value F;
s5: the vehicle controller controls the second clutch C2 to transmit torque so that the rotating speed of the engine is gradually close to the rotating speed of the second electric machine EM2, when the absolute value of the difference between the rotating speeds of the engine and the second electric machine EM2 is smaller than a set threshold value G, the vehicle controller controls the second clutch C2 to be closed, and the vehicle is switched from the EV-1 driving mode to the HEV-2 driving mode.
The set threshold C is-1500-300 rpm, the set threshold D is 500-800 rpm, the set threshold E is 400-500 rpm, the set threshold F is-200-100 rpm, and the set threshold G is 30-80 rpm.
The gradient delta V is 200-1000 Nm/s.
If the current accelerator pedal opening degree of the vehicle, namely the accelerator pedal opening degree, received by the vehicle controller is larger than a set threshold value A, and the actual rotating speed of the second motor (EM2) is larger than a set threshold value B, wherein the set threshold value A is 60% -80%, and the set threshold value B is 100-300 rpm, the vehicle controller judges that a user needs to switch the low-speed driving mode.
The low-speed driving mode switching control method of the power split type hybrid vehicle is simple and feasible, and the vehicle is smoothly switched from the EV-1 driving mode to the HEV-2 driving mode by correspondingly controlling the first brake B1 and the second clutch C2 in the driving mode switching process, so that the vehicle can respond to the large torque requirement of a driver under the low-speed starting working condition and output surge power to meet the starting power or climbing power, meanwhile, the mode switching process is compact and continuous, the mode switching time is shortened, and the vehicle is smoother and has better driving safety and comfort in the whole mode switching process.
Drawings
FIG. 1 is a schematic structural view of a hybrid transmission used in the present invention;
FIG. 2 is an equivalent lever diagram of the EV-1 drive mode of the hybrid transmission used in the present invention;
FIG. 3 is an equivalent lever diagram of the HEV-2 drive mode of the hybrid transmission used in the present invention;
fig. 4 is a control flowchart of a low-speed drive mode switching control method of the power split hybrid vehicle in embodiment 1.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to the description of the examples.
The structural schematic diagram of the hybrid power transmission device used in the invention is shown in fig. 1, and its main components include a first electric machine EM1, a second electric machine EM2, an input shaft 1, a first brake B1, a second brake B2, a first clutch C1 and a second clutch C2, and a planetary gear coupling mechanism 5, where the planetary gear coupling mechanism 5 includes a single planetary row PG1 and a double planetary row PG2, the single planetary row PG1 includes a first sun gear S1, a first planet gear P1, a first planet carrier PC1, and a first ring gear R1, the first planet gear P1 is mounted on the first planet carrier PC1, and the first planet gear P1 is meshed with a first sun gear S1 and a first ring gear R1, respectively; the double-planet row PG2 comprises a second sun gear S2, a second inner planet gear IP2, a second outer planet gear OP2, a second planet carrier PC2 and a second ring gear R2, wherein the second inner planet gear IP2 and the second outer planet gear OP2 are both mounted on the second planet carrier PC2, the second inner planet gear IP2 is meshed with the second outer planet gear OP2, the second sun gear S2 is meshed with the second inner planet gear IP2, and the second ring gear R2 is meshed with the second outer planet gear OP 2; the second sun gear S2 is connected with the second rotor shaft 8 of the second electric machine EM2 through a first intermediate shaft 2 with a hollow inside, the first sun gear S1 is connected with the first rotor shaft 7 of the first electric machine EM1 through a second intermediate shaft 3 with a hollow inside, the first intermediate shaft 2 passes through the second intermediate shaft 3, the first planet carrier PC1 and the second planet carrier PC2 are connected to form an inner hollow central shaft 4, the first ring gear R1 and the second ring gear R2 are connected to form an output shaft 6, the input shaft 1 passes through the first intermediate shaft 2 and the central shaft 4 in sequence, the input shaft 1 is connected with the output shaft of the engine ICE through a flywheel damper FW, one ends of a first brake B1 and a first clutch C1 are respectively connected with the central shaft 4, the other end of the first brake B1 is fixed on the gearbox housing 9, the other end of the first clutch C1 is connected with the input shaft 1, one end of the second clutch C2 is connected with the second rotor shaft 8 of the second electric machine EM2, the other end of the second clutch C2 is connected to the input shaft 1, one end of the second brake B2 is connected to the second intermediate shaft 3, and the other end of the second brake B2 is fixed to the transmission case 9. The structure of the hybrid transmission used in the present invention has been disclosed in a transmission for a rear-drive hybrid vehicle (publication No. CN 108099576A).
The hybrid transmission used in the present invention has a plurality of operating modes, and the control relationship between the respective operating modes and the shift elements is shown in table 1, where good represents the open state and ● represents the closed state.
TABLE 1 control relationship between the operating modes and the shift elements
An equivalent lever diagram of a first-gear pure electric drive mode, namely a fixed-gear pure electric mode (EV-1 drive mode for short) is shown in fig. 2, an equivalent lever diagram of a second-gear hybrid drive mode (HEV-2 drive mode for short) is shown in fig. 3, and in fig. 2 and 3, the left ordinate represents the rotating speed, nS1 represents the first sun gear rotating speed, nS2 represents the second sun gear rotating speed, ncie represents the engine rotating speed, nR1 represents the first ring gear rotating speed, and nPC1 represents the first carrier rotating speed.
Example 1
A power split type hybrid vehicle low-speed driving mode switching control method is characterized in that a control flow chart is shown in fig. 4, when a vehicle is in an EV-1 driving mode, if a current accelerator pedal (namely an accelerator pedal opening degree) of the vehicle received by a vehicle controller is larger than a set threshold A and an actual rotating speed of a second electric machine EM2 is larger than a set threshold B, wherein the set threshold A is 70%, and the set threshold B is 100rpm, the vehicle controller judges that a user needs to switch a low-speed driving mode, and the method is carried out according to the following steps:
s1: the vehicle control unit pre-charges the second clutch C2, when the pre-charging of the second clutch C2 is completed and the rotating speed difference between the engine and the second motor EM2 is within a set interval C, the set interval C is-1500-300 rpm, and step S2 is executed;
s2: the vehicle control unit controls the second clutch C2 to slide and drag the engine, when the rotating speed of the engine exceeds a set threshold D, the set threshold D is 500rpm, and step S3 is executed;
s3: the finished vehicle controller controls the transmission torque of the second clutch C2 to be reduced to 0 according to a certain gradient delta V, the gradient delta V is 500Nm/S, the pressure of the second clutch C2 is controlled to be reduced to a pressure value corresponding to a kisspepoint state, when the rotating speed of the engine is reduced to a set threshold value E, the set threshold value E is 400rpm, and step S4 is executed;
s4: the vehicle control unit controls the engine to start oil injection, increases the rotating speed of the engine by controlling the torque required by the engine, sets the threshold F to be-200 rpm when the rotating speed difference between the engine and the second motor EM2 is larger than the set threshold F, and executes the step S5;
s5: the vehicle controller controls the second clutch C2 to transmit torque so that the rotating speed of the engine is gradually close to the rotating speed of the second electric machine EM2, when the absolute value of the difference between the rotating speeds of the engine and the second electric machine EM2 is smaller than a set threshold G, the set threshold G is 50rpm, the vehicle controller controls the second clutch C2 to be closed, and the vehicle is switched from the EV-1 driving mode to the HEV-2 driving mode.
Example 2
A power split hybrid vehicle low-speed drive mode switching control method whose steps are substantially the same as those of the power split hybrid vehicle low-speed drive mode switching control method in embodiment 1, except that: the threshold A was set at 60%, the threshold B was set at 200rpm, the threshold D was set at 800rpm, the threshold E was set at 500rpm, the threshold F was set at-100 rpm, the threshold G was set at 30rpm, and the gradient DeltaV was 200 Nm/s.
Example 3
A power split hybrid vehicle low-speed drive mode switching control method whose steps are substantially the same as those of the power split hybrid vehicle low-speed drive mode switching control method in embodiment 1, except that: the threshold A was set at 80%, the threshold B was set at 300rpm, the threshold D was set at 600rpm, the threshold E was set at 500rpm, the threshold F was set at-150 rpm, the threshold G was set at 80rpm, and the gradient DeltaV was 1000 Nm/s.
Claims (4)
1. A low-speed driving mode switching control method of a power split type hybrid vehicle is characterized by comprising the following steps: the hybrid power transmission device comprises a first electric machine (EM1), a second electric machine (EM2), an input shaft, a first brake (B1), a second brake (B2), a first clutch (C1), a second clutch (C2) and a planetary gear coupling mechanism, wherein the planetary gear coupling mechanism comprises a single planetary row and a double planetary row, the single planetary row comprises a first sun gear, a first planetary gear, a first planet carrier and a first gear ring, the first planetary gear is mounted on the first planet carrier, and the first planetary gear is meshed with the first sun gear and the first gear ring respectively; the double planet rows comprise a second sun wheel, a second inner planet wheel, a second outer planet wheel, a second planet carrier and a second gear ring, the second inner planet wheel and the second outer planet wheel are both arranged on the second planet carrier and meshed with each other, the second sun wheel is meshed with the second inner planet wheel, and the second gear ring is meshed with the second outer planet wheel; the second sun gear is connected with a second rotor shaft of a second motor through a first intermediate shaft with a hollow inner part, the first sun gear is connected with a first rotor shaft on the first motor through the second intermediate shaft with the hollow inner part, the first intermediate shaft passes through the second intermediate shaft, a first planet carrier and a second planet carrier are connected to form a central shaft with the hollow inner part, a first gear ring and a second gear ring are connected to form an output shaft, the input shaft sequentially passes through the first intermediate shaft and the central shaft, the input shaft is connected with an output shaft of an engine through a flywheel damper, one end of a first brake and one end of a first clutch are respectively connected on the central shaft, the other end of the first brake is fixed on a gearbox shell, the other end of the first clutch is connected on the input shaft, one end of a second clutch is connected with a second rotor shaft of the second motor, the other end of the second clutch is connected with the input shaft, one end of the second brake is connected with, the other end of the second brake is fixed on the gearbox shell; when the vehicle is in a first-gear pure electric driving mode, the vehicle controller judges whether a user needs to switch a low-speed driving mode, if so, the vehicle controller keeps a first brake (B1) locked and performs the following steps:
s1: the vehicle control unit pre-charges the second clutch (C2), and executes step S2 when the pre-charging of the second clutch (C2) is completed and the rotation speed difference between the engine and the second motor (EM2) is within the set interval C;
s2: the vehicle control unit controls a second clutch (C2) to slip and drag the engine, and when the engine speed exceeds a set threshold value D, the vehicle control unit executes step S3;
s3: the vehicle control unit controls the transmission torque of the second clutch (C2) to be reduced to 0 according to a certain gradient DeltaV, controls the pressure of the second clutch (C2) to be reduced to a pressure value corresponding to a kisspepoint state, and executes a step S4 when the rotating speed of the engine is reduced to a set threshold value E, wherein the set threshold value E is smaller than a set threshold value D;
s4: the vehicle control unit controls the engine to start oil injection, increases the engine speed by controlling the engine required torque, and executes the step S5 when the speed difference between the engine and the second motor (EM2) is larger than a set threshold value F;
s5: the vehicle control unit controls the second clutch (C2) to transmit torque so that the rotating speed of the engine is gradually close to the rotating speed of the second electric machine (EM2), when the absolute value of the difference between the rotating speeds of the engine and the second electric machine (EM2) is smaller than a set threshold value G, the vehicle control unit controls the second clutch (C2) to be closed, and the vehicle is switched from the first-gear pure electric driving mode to the second-gear hybrid driving mode.
2. The power split hybrid vehicle low-speed drive mode switching control method according to claim 1, characterized in that: the set interval C is-1500-300 rpm, the set threshold D is 500-800 rpm, the set threshold E is 400-500 rpm, the set threshold F is-200-100 rpm, and the set threshold G is 30-80 rpm.
3. The power split hybrid vehicle low-speed drive mode switching control method according to claim 1, characterized in that: the gradient delta V is 200-1000 Nm/s.
4. The power split hybrid vehicle low-speed drive mode switching control method according to any one of claims 1 to 3, characterized in that: if the current accelerator pedal opening degree of the vehicle received by the vehicle controller is larger than a set threshold A and the actual rotating speed of the second motor (EM2) is larger than a set threshold B, wherein the set threshold A is 60% -80%, and the set threshold B is 100-300 rpm, the vehicle controller judges that the user needs to switch the low-speed driving mode.
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| CN111572534B (en) * | 2020-04-03 | 2022-11-04 | 江西鼎盛新材料科技有限公司 | Power-split type hybrid power truck brake safety protection mode switching control method |
| WO2022147870A1 (en) * | 2021-01-07 | 2022-07-14 | 浙江吉利控股集团有限公司 | Method and apparatus for starting engine in dual-motor hybrid power system, and vehicle |
| CN113085528A (en) * | 2021-04-27 | 2021-07-09 | 浙江吉利控股集团有限公司 | Hybrid power system, hybrid transmission and automobile |
| CN113665353A (en) * | 2021-09-14 | 2021-11-19 | 燕山大学 | Dual-motor coupling driving system |
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| KR20090040010A (en) * | 2007-10-19 | 2009-04-23 | 현대자동차주식회사 | A shift control system of automatic transmission on vehicle and method thereof |
| CN102114766B (en) * | 2009-12-31 | 2014-03-19 | 比亚迪股份有限公司 | Hybrid drive system and driving method thereof |
| DE112012006557B4 (en) * | 2012-06-19 | 2023-01-12 | Toyota Jidosha Kabushiki Kaisha | Power transmission device for a hybrid vehicle and hybrid system |
| CN103863313B (en) * | 2012-12-18 | 2016-03-09 | 上海汽车集团股份有限公司 | power system control method |
| CN109849889B (en) * | 2019-03-25 | 2020-08-28 | 科力远混合动力技术有限公司 | Hybrid power driving mode switching control method of power split type hybrid power vehicle |
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Effective date of registration: 20220829 Address after: No.16 Gongxin Avenue, industrial park, Yifeng County, Yichun City, Jiangxi Province Patentee after: Jiangxi Dingsheng New Material Technology Co.,Ltd. Address before: Room 601-604, Building A, Building 1#, No. 131, Jihua West Road, Chancheng District, Foshan City, Guangdong Province, 528000 Patentee before: CORUN HYBRID POWER TECHNOLOGY Co.,Ltd. |
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