CN217227285U - Unpowered interrupt type multi-gear power split hybrid power driving system - Google Patents
Unpowered interrupt type multi-gear power split hybrid power driving system Download PDFInfo
- Publication number
- CN217227285U CN217227285U CN202220828826.7U CN202220828826U CN217227285U CN 217227285 U CN217227285 U CN 217227285U CN 202220828826 U CN202220828826 U CN 202220828826U CN 217227285 U CN217227285 U CN 217227285U
- Authority
- CN
- China
- Prior art keywords
- gear
- power
- ice
- output
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The utility model relates to the technical field of vehicle drive, in particular to an unpowered interrupted multi-gear power splitting hybrid power drive system, which comprises an engine, a torsional damper, a first motor, a power splitting device, a second motor, a drive motor power shifting device, an engine power shifting device and an output device, wherein the engine is fixedly connected with the input end of the torsional damper, the output end of the torsional damper is fixedly connected with a planet carrier component of the power splitting device, and the first motor is fixedly connected with a sun gear of the power splitting device; a gear ring output shaft of the power split device is connected with an engine power gear shifting device or an output device through an ICE power gear shifting mechanism; the second motor is connected with the power gear shifting device of the driving motor and is output through the output device after two-stage speed reduction and torque increase. The system can realize unpowered interruption gear shifting in a hybrid power mode, can greatly improve the dynamic property of a vehicle, and can improve the driving feeling.
Description
Technical Field
The utility model relates to a vehicle drive technical field especially relates to a many grades of power split hybrid power drive system of unpowered interrupt formula.
Background
The double-motor planetary gear row power splitting technology couples the power of the engine and the power of the generator through the power splitting planetary gear row, and can realize continuous adjustment of output rotating speed, namely stepless speed change. And the motor is matched with a driving motor, so that the motor can be driven by pure electricity when the vehicle runs at a low speed, the exhaust emission of the engine running at the low speed is reduced, and the engine is prevented from working at a low efficiency point. And when the vehicle speed is medium, the working rotating speed range of the engine is optimized by using the generator, the output torque of the engine is compensated or partially recovered by using the generator and the driving motor, and the high-efficiency working range of the engine is fully utilized. Therefore, the power splitting technology of the double-motor planet row is applied more widely.
However, when the traditional double-motor planetary gear power splitting scheme is applied to a large-scale passenger vehicle or a commercial vehicle, due to the splitting effect of the generator, the torque output by the power splitting planetary gear is always smaller than the output torque of the engine, and in order to meet the torque requirements of working conditions such as heavy load, low speed climbing and the like of the whole vehicle, a set of speed changing unit is generally added at a power output end to provide a low gear, but power interruption exists inevitably in the gear shifting process, and the driving feeling is influenced.
Therefore, a new technology is urgently needed to solve the technical problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's problem, provide a many grades of power split hybrid power driving system of unpowered interrupt type, through respectively arranging one set of shift element at engine power output end, driving motor power output end, can realize unpowered interrupt under the hybrid power mode and shift. The dynamic property of the vehicle is improved, and the driving feeling is improved.
The above purpose is realized by the following technical scheme:
an unpowered interrupted multi-gear power splitting hybrid power driving system comprises an engine, a torsional damper, a first motor, a power splitting device, a second motor, a driving motor power shifting device, an engine power shifting device and an output device, wherein the engine is fixedly connected with the input end of the torsional damper, the output end of the torsional damper is fixedly connected with a planet carrier assembly of the power splitting device, and the first motor is fixedly connected with a sun gear of the power splitting device; a gear ring output shaft of the power split device is connected with the engine power shifting device or the output device through an ICE power shifting mechanism; the second motor is connected with the power gear shifting device of the driving motor and is output through the output device after two-stage speed reduction and torque increase, and the output device is integrated with a constant-meshed gear of the output device.
Further, the driving motor power gear shifting device comprises a TM first-gear driving gear, a TM second-gear driving gear, a TM first-gear, a TM second-gear, a TM middle shaft output gear and the TM power gear shifting mechanism; the TM first-gear driving gear and the TM second-gear driving gear are integrated on a TM driving shaft and fixedly connected with the second motor through a TM driving wheel; the TM first-gear and the TM second-gear are sleeved on the TM intermediate shaft in an empty mode and can be meshed with the TM first-gear driving gear and the TM second-gear driving gear respectively; the TM intermediate shaft output gear is integrated on the TM intermediate shaft and is meshed with the constant mesh gear of the output device; the TM power gear shifting mechanism is fixedly connected with the TM intermediate shaft.
Further, TM power gearshift is sliding sleeve formula gearshift, including left, well, three fender position on the right side, specifically does:
when the gear is in the left position, the TM power gear shifting mechanism is connected with the TM first-gear;
when the TM power gear shifting mechanism is in a neutral position, the TM power gear shifting mechanism is not connected;
and when the gear is in the right position, the TM power gear shifting mechanism is connected with the TM two-gear.
Further, the engine power shifting device comprises an ICE first-gear, an ICE middle shaft input gear, an ICE middle shaft output gear and an ICE power shifting mechanism; the ICE countershaft input gear and the ICE countershaft output gear are integrated with the ICE countershaft; the ICE first gear is meshed with the ICE intermediate shaft input gear, and the ICE intermediate shaft output gear is meshed with the output device constant mesh gear; and the ICE power gear shifting mechanism is fixedly connected with the gear ring output shaft.
Further, the ICE power shift mechanism is a sliding sleeve type shift mechanism, and includes three gears, namely a left gear, a middle gear and a right gear, specifically:
when the gear is in the left position, the ICE power gear shifting mechanism is connected with the ICE first-gear;
when the gear is in the middle position, the ICE power gear shifting mechanism is not connected;
and when the ICE power shifting mechanism is in the right position, the ICE power shifting mechanism is connected with the output device.
Further, the driving modes include an electric-only driving mode, an engine-only driving mode, and a hybrid driving mode.
Advantageous effects
The utility model provides a non-power interruption type multi-gear power split hybrid power driving system, can realize at least two different speed ratio paths to transmit power through the engine power gear shifting device and the driving motor power gear shifting device respectively, and the power interruption in the gear shifting process can be eliminated through double power source output and sequential gear shifting, so that non-power interruption gear shifting is realized; through coordinated control engine, first motor, second motor, driving motor power gearshift and engine power gearshift, can realize under the hybrid mode unpowered interrupt and shift, not only can promote vehicle dynamic nature by a wide margin, can also improve the driving impression.
Drawings
Fig. 1 is a schematic structural diagram of an unpowered interrupted multi-gear power split hybrid power driving system according to the present invention;
fig. 2 is a schematic structural view of a power split device of an unpowered interrupted multi-gear power split hybrid power driving system according to the present invention;
fig. 3 is a schematic structural view of a power shift device of a driving motor of a non-power-interruption multi-gear power-split hybrid driving system according to the present invention;
fig. 4 is the utility model relates to an engine power gearshift of unpowered formula multi-gear power split hybrid drive system.
Graphic notation:
1-engine, 2-torsional vibration damper, 3-first motor, 4-power split device, 401-planet carrier assembly, 402-sun gear, 403-gear ring output shaft, 5-second motor, 6-driving motor power shift device, 601-TM first gear driving gear, 602-TM second gear driving gear, 603-TM first gear, 604-TM two gear, 605-TM countershaft, 606-TM countershaft output gear, 607-TM power shift mechanism, 7-engine power shift device, 701-ICE one gear, 702-ICE countershaft input gear, 703-ICE countershaft, 704-ICE countershaft output gear, 705-ICE power shift mechanism, 8-output device, 801-output device constant mesh gear.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 1 and 2, an unpowered interrupt type multi-gear power split hybrid drive system comprises an engine 1, a torsional damper 2, a first electric motor 3, a power split device 4, a second electric motor 5, a driving motor power shift device 6, an engine power shift device 7 and an output device 8;
specifically, the engine 1 is fixedly connected with an input end of the torsional damper 2, an output end of the torsional damper 2 is fixedly connected with a planet carrier assembly 401 of the power split device 4, and the first motor 3 is fixedly connected with a sun gear 402 of the power split device 7; the ring gear output shaft 403 of the power split device 4 is connected with the engine power shift device 7 or the output device 8 through an ICE power shift mechanism 705; the second motor 5 is connected with the driving motor power gear shifting device 7, and is output through the output device 8 after two-stage speed reduction and torque increase, and the output device 8 is integrated with an output device constant meshing gear 801.
As shown in fig. 3, as an optimization of the driving motor power shifting device 6 in the present embodiment, the driving motor power shifting device 6 includes a TM first gear driving gear 601, a TM second gear driving gear 602, a TM first gear 603, a TM second gear 604, a TM countershaft 605, a TM countershaft output gear 606, and the TM power shifting mechanism 607;
the TM first gear driving gear 601 and the TM second gear driving gear 602 are integrated on a TM driving shaft and are fixedly connected with the second motor 5 through a TM driving wheel; the TM first-gear 603 and the TM second-gear 604 are freely sleeved on the TM intermediate shaft 605 and can be respectively meshed with the TM first-gear drive gear 601 and the TM second-gear drive gear 602; the TM countershaft output gear 606 is integrated on the TM countershaft 605, meshing with the output means constant mesh gear 801; the TM power shift mechanism 607 is fixedly connected to the TM intermediate shaft 605.
Specifically, in this embodiment, the TM power shift mechanism 607 is a sliding sleeve type shift mechanism, and includes three gears, including the following working modes:
when the gear is in the left position, the TM power shift mechanism 607 is connected with the TM first-gear 603;
when the TM power shift mechanism 607 is in the neutral position, there is no connection;
when the gear is in the right position, the TM power shift mechanism 607 is connected to the TM secondary gear 604.
As shown in fig. 4, as an optimization of the engine power shift device 7 in the present embodiment, the engine power shift device 7 includes an ICE first-gear 701, an ICE countershaft input gear 702, an ICE countershaft 703, ICE countershaft output gears 704 and 705ICE power shift mechanisms;
the ICE layshaft input gear 702 and the ICE layshaft output gear 704 are integrated into the ICE layshaft 703; the ICE first gear 701 meshes with the ICE layshaft input gear 702, the ICE layshaft output gear 704 meshes with the output means constant mesh gear 801; the ICE power shift mechanism 705 is fixedly connected to the ring gear output shaft 403.
Specifically, in this embodiment, the ICE power shift mechanism 705 is a sliding sleeve type shift mechanism, and includes three gears, namely, a left gear, a middle gear, and a right gear, and includes the following working modes:
in the left position, the ICE power shift mechanism 705 is connected with the ICE first gear 701;
when in the neutral position, the ICE power shift mechanism 705 is not connected;
in the right position, the ICE powershift mechanism 705 is connected to the output device 8.
The driving mode of the system comprises a pure electric driving mode, an engine independent driving mode and a hybrid driving mode, and specifically comprises the following steps:
(1) the pure electric drive mode 1-speed drive force transmission path is as follows:
The power of the second electric motor 5 is transmitted to the TM first gear driving gear 601 and the TM second gear driving gear 602, the TM first gear driving gear 601 and the TM second gear driving gear 602 transmit the power to the TM first gear 603 and the TM second gear 604, respectively, the TM power shift mechanism 607 is in the left position, transmits the power of the TM first gear 603 to the TM intermediate shaft output gear 606 through the TM intermediate shaft 605, then transmits the power to the output device constant mesh 801, and further outputs the power through the output device 8 to drive the vehicle to run.
(2) The pure electric drive mode 2-speed drive force transmission path is as follows:
The second electric motor 5 transmits power to the TM first gear drive gear 601 and the TM second gear drive gear 602, the TM first gear drive gear 601 and the TM second gear drive gear 602 transmit power to the TM first gear 603 and the TM second gear 604, respectively, the TM power shift mechanism 607 is in the right position, transmits power of the TM second gear 604 to the TM intermediate shaft output gear 606 through the TM intermediate shaft 605, then transmits power to the output device constant mesh 801, and further outputs power through the output device 8 to drive the vehicle to travel.
(3) The engine-only drive mode 1-speed drive force transmission path is as follows:
ICE powershift 705 is in the left position, TM powershift 607 is in the neutral position, and the electric motor is disconnected from the output.
Power from engine 1 may be transmitted to ICE powershift mechanism 705 along torsional damper 2, ring gear output shaft 403 in power split device 4. The ICE power shifting mechanism 705 is in a left position, and power is transmitted to an ICE first gear 701, an ICE countershaft input gear 702 and an ICE countershaft 703, then is transmitted to an output device constant mesh 801 through an ICE countershaft output gear 704, and then is output through an output device 8 to drive the vehicle to run.
(4) The engine-only drive mode 2-speed drive force transmission path is as follows:
Power from engine 1 may be transmitted to ICE powershift mechanism 705 along torsional damper 2, ring gear output shaft 403 in power split device 4. The ICE power shift mechanism 705 is in the right position, and the power transmission is directly transmitted to the output device 8, so that the output power drives the vehicle to run.
(5) The hybrid drive mode 1-speed drive force transmission path is as follows:
Power from engine 1 may be transmitted to ICE powershift mechanism 705 along torsional damper 2, ring gear output shaft 403 in power split device 4. The ICE power shifting mechanism 705 is in the left position, and power is transmitted to an ICE first gear 701, an ICE countershaft input gear 702 and an ICE countershaft 703 and then transmitted to an output device constant mesh 801 through an ICE countershaft output gear 704; the second electric motor 5 transmits power to the TM first-gear drive gear 601 and the TM second-gear drive gear 602, the TM first-gear drive gear 601 and the TM second-gear drive gear 602 transmit power to the TM first-gear 603 and the TM second-gear 604, respectively, the TM power shift mechanism 607 is in the left position, transmits power of the TM first-gear 603 to the TM countershaft output gear 606 via the TM countershaft 605, and then transmits power to the output device constant mesh 801. The two powers are coupled at the output device constant mesh 801 and are transmitted to the output device 8 together, and then the vehicle is driven to run by the output power of the output device 8.
(6) The hybrid drive mode 2-speed drive force transmission path is as follows:
Power from engine 1 may be transmitted to ICE powershift mechanism 705 along torsional damper 2, ring gear output shaft 403 in power split device 4. The ICE power shifting mechanism 705 is in the left position, and power is transmitted to an ICE first gear 701, an ICE countershaft input gear 702 and an ICE countershaft 703 and then transmitted to an output device constant mesh 801 through an ICE countershaft output gear 704; the second electric motor 5 power is transmitted to the TM first gear drive gear 601 and the TM second gear drive gear 602, the TM first gear drive gear 601 and the TM second gear drive gear 602 transmit the power to the TM first gear 603 and the TM second gear 604, respectively, the TM power shift mechanism 607 is in the right position, transmits the power of the TM second gear 604 to the TM countershaft output gear 606 via the TM countershaft 605, and then transmits the power to the output device constant mesh 801. The two powers are coupled at the constant mesh 801 of the output device, and are transmitted to the output device 8 together, so that the vehicle is driven to run by the output power of the output device 8.
(7) Hybrid drive mode 3-speed drive force transmission path is as follows:
Power from engine 1 may be transmitted to ICE powershift mechanism 705 along torsional damper 2, ring gear output shaft 403 in power split device 4. ICE power shift mechanism 705 is in the right position, with power transfer directly to output device 8; the second electric motor 5 transmits power to the TM first-gear drive gear 601 and the TM second-gear drive gear 602, the TM first-gear drive gear 601 and the TM second-gear drive gear 602 transmit power to the TM first-gear 603 and the TM second-gear 604, respectively, the TM power shift mechanism 607 is in the left position, transmits power of the TM first-gear 603 to the TM countershaft output gear 606 via the TM countershaft 605, and then transmits power to the output device constant mesh 801. The two powers are coupled through an output device 8, and the output power drives the vehicle to run.
(8) Hybrid drive mode 4-speed drive force transmission path is as follows:
Power from engine 1 may be transmitted to ICE powershift mechanism 705 along torsional damper 2, ring gear output shaft 403 in power split device 4. ICE power shift mechanism 705 is in the right position, with power transfer directly to output device 8; the second electric motor 5 transmits power to the TM first-gear drive gear 601 and the TM second-gear drive gear 602, the TM first-gear drive gear 601 and the TM second-gear drive gear 602 transmit power to the TM first-gear 603 and the TM second-gear 604, respectively, the TM power shift mechanism 607 is in the right position, transmits power of the TM second-gear 604 to the TM countershaft output gear 606 via the TM countershaft 605, and then transmits power to the output device constant mesh 801. The two powers are coupled through an output device 8, and the output power drives the vehicle to run.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any conceivable changes or substitutions by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The unpowered interrupted multi-gear power splitting hybrid power driving system is characterized by comprising an engine, a torsional damper, a first motor, a power splitting device, a second motor, a driving motor power shifting device, an engine power shifting device and an output device, wherein the engine is fixedly connected with the input end of the torsional damper, the output end of the torsional damper is fixedly connected with a planet carrier assembly of the power splitting device, and the first motor is fixedly connected with a sun gear of the power splitting device; a gear ring output shaft of the power split device is connected with the engine power shifting device or the output device through an ICE power shifting mechanism; the second motor is connected with the power gear shifting device of the driving motor and is output through the output device after two-stage speed reduction and torque increase, and the output device is integrated with a constant-meshed gear of the output device.
2. The unpowered interrupt-type multi-speed power-split hybrid drive system of claim 1, wherein the drive motor power-shifting device comprises a TM first-speed drive gear, a TM second-speed drive gear, a TM first-speed gear, a TM second-speed gear, a TM countershaft output gear, and a TM power-shifting mechanism; the TM first-gear driving gear and the TM second-gear driving gear are integrated on a TM driving shaft and fixedly connected with the second motor through a TM driving wheel; the TM first-gear and the TM second-gear are sleeved on the TM intermediate shaft in an empty mode and can be meshed with the TM first-gear driving gear and the TM second-gear driving gear respectively; the TM intermediate shaft output gear is integrated on the TM intermediate shaft and is meshed with the constant mesh gear of the output device; the TM power gear shifting mechanism is fixedly connected with the TM intermediate shaft.
3. The unpowered interrupted multi-gear power-split hybrid drive system according to claim 2, wherein the TM power shift mechanism is a sliding sleeve type shift mechanism, which includes three gears, namely:
when the gear is in the left position, the TM power gear shifting mechanism is connected with the TM first-gear;
when the TM power gear shifting mechanism is in a neutral position, the TM power gear shifting mechanism is not connected;
and when the gear is in the right position, the TM power gear shifting mechanism is connected with the TM two-gear.
4. The unpowered interrupt multiple speed power split hybrid drive system of claim 1 wherein the engine power shifting device comprises an ICE one-speed gear, an ICE countershaft input gear, an ICE countershaft output gear and an ICE power shifting mechanism; the ICE countershaft input gear and the ICE countershaft output gear are integrated with the ICE countershaft; the ICE first gear is meshed with the ICE intermediate shaft input gear, and the ICE intermediate shaft output gear is meshed with the output device constant mesh gear; and the ICE power gear shifting mechanism is fixedly connected with the gear ring output shaft.
5. The unpowered interrupted multi-speed power-split hybrid drive system according to claim 4, wherein the ICE power shifting mechanism is a sliding sleeve type shifting mechanism, which includes three gears, namely:
when the gear is in the left position, the ICE power gear shifting mechanism is connected with the ICE first-gear;
when the gear is in a neutral position, the ICE power gear shifting mechanism is not connected;
and when the ICE power shifting mechanism is in the right position, the ICE power shifting mechanism is connected with the output device.
6. The unpowered interrupted, multiple speed power-split hybrid drive system of claim 1 wherein the drive modes include an electric-only drive mode, an engine-only drive mode, and a hybrid drive mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220828826.7U CN217227285U (en) | 2022-04-11 | 2022-04-11 | Unpowered interrupt type multi-gear power split hybrid power driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220828826.7U CN217227285U (en) | 2022-04-11 | 2022-04-11 | Unpowered interrupt type multi-gear power split hybrid power driving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217227285U true CN217227285U (en) | 2022-08-19 |
Family
ID=82818841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220828826.7U Active CN217227285U (en) | 2022-04-11 | 2022-04-11 | Unpowered interrupt type multi-gear power split hybrid power driving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217227285U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891603A (en) * | 2023-03-03 | 2023-04-04 | 北京航空航天大学 | Double-motor multi-gear electric driving mechanism |
-
2022
- 2022-04-11 CN CN202220828826.7U patent/CN217227285U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891603A (en) * | 2023-03-03 | 2023-04-04 | 北京航空航天大学 | Double-motor multi-gear electric driving mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109185417B (en) | Quick reversing power-dividing hydraulic mechanical stepless speed changer | |
| JP2020506341A (en) | Drive assembly for horizontal vehicle | |
| CN114407637B (en) | Power transmission system and vehicle | |
| CN218777413U (en) | Electric drive bridge structure driven by single motor | |
| CN113276658A (en) | Two keep off bi-motor planet row power split drive system | |
| CN216783253U (en) | Power transmission system and vehicle | |
| CN108162741B (en) | Speed change structure of hybrid power vehicle | |
| CN202753775U (en) | Two-gear integrated automated mechanical transmission (AMT) gearbox for electric vehicle | |
| CN217227285U (en) | Unpowered interrupt type multi-gear power split hybrid power driving system | |
| CN109737190B (en) | Two double planetary gear four-gear automatic transmission of double separation and reunion | |
| CN108162743B (en) | Speed variator for hybrid power vehicle | |
| CN218777398U (en) | Three-gear electric drive bridge structure | |
| CN115539589A (en) | High-speed-ratio gearbox | |
| CN214138220U (en) | Series-parallel hybrid power configuration | |
| CN209795160U (en) | hybrid power driving system and hybrid power automobile | |
| CN210126429U (en) | Series-parallel hybrid power system based on two gearboxes | |
| CN116018287A (en) | Single-motor multi-mode hybrid power system and hybrid power vehicle | |
| CN218430833U (en) | Multi-gear variable speed hybrid power system with motor directly connected with intermediate shaft | |
| CN218430827U (en) | Parallel arrangement double-motor double-planet-row hybrid power system | |
| CN113619378B (en) | Multi-gear double-motor planetary gear power split driving system | |
| CN111376701A (en) | Hybrid power driving system and hybrid power automobile | |
| CN218430826U (en) | Dual-motor single-planet-row hybrid power system with limping function | |
| CN220281113U (en) | Multi-gear power splitting hybrid driving system | |
| CN220785437U (en) | Double-planet row mixing system | |
| CN218430834U (en) | Dual-motor single-planet-row hybrid power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |