CN218316238U - Power coupling system of hybrid electric vehicle - Google Patents
Power coupling system of hybrid electric vehicle Download PDFInfo
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- CN218316238U CN218316238U CN202220865822.6U CN202220865822U CN218316238U CN 218316238 U CN218316238 U CN 218316238U CN 202220865822 U CN202220865822 U CN 202220865822U CN 218316238 U CN218316238 U CN 218316238U
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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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Abstract
The utility model provides a hybrid vehicle's power coupling system belongs to the automobile power system field. The system comprises an engine, a power coupling module, an energy storage flywheel, a flywheel brake and a speed change/reduction mechanism. Wherein the power coupling module comprises a control motor, a single-row planetary gear mechanism and a reduction gear Z 1 And a reduction gear Z 2 . The output end of a crankshaft of the engine without the flywheel is directly connected with a planet carrier of the single-row planetary gear mechanism; planet carrier and gear changeThe speed/reduction mechanism is in transmission connection so as to output power; the control motor is connected with the sun gear; the energy storage flywheel passes through a reduction gear Z 1 And a reduction gear Z 2 Is in transmission connection with the gear ring. The utility model discloses can realize the high-efficient recycle of braking energy to the fluctuation of effective filtration load has instantaneous high power compensation, energy saving and emission reduction's ability in order to stabilize the instantaneous rotational speed of engine.
Description
Technical Field
The utility model relates to a hybrid vehicle's power coupling system belongs to the car driving system field.
Background
To achieve the "dual carbon" goal, reducing the carbon emissions of the transportation industry is an important consideration. As a transition product from an automobile to pure electric transformation, the hybrid electric vehicle integrates an advanced internal combustion engine technology and an electric drive mode, can utilize a motor to adjust the operation condition of an engine so as to reduce oil consumption and emission, and can recover the kinetic energy of the vehicle in the braking process so as to improve the energy utilization rate of the whole automobile.
The conventional oil-electricity hybrid electric vehicle generally adopts a battery as an energy storage element, and energy loss is caused by frequent energy conversion in the running process of the vehicle, so that the energy efficiency is reduced; in addition, the oil-electric hybrid vehicle can impact the battery during high-power regenerative braking to reduce the service life of the oil-electric hybrid vehicle, so that the kinetic energy recovery capability of the oil-electric hybrid vehicle is limited only by using the battery as an energy storage element. Compared with a power battery in the field of electrochemical energy storage, the flywheel energy storage technology belongs to physical energy storage, has the advantages of high power density, long service life, low maintenance cost, high efficiency, no pollution and the like, is introduced into a hybrid power system, fully exerts good load response capability and high power charging and discharging characteristics of a flywheel, can realize instantaneous improvement of vehicle dynamic performance, can realize efficient recovery of braking energy, and can reduce the impact on the battery, thereby overcoming the defects of the conventional oil-electricity hybrid power automobile.
Disclosure of Invention
An object of the utility model is to provide a novel power coupled system realizes that vehicle kinetic energy retrieves and recycles, improves vehicle dynamic nature and economic nature, reduces and makes the degree of difficulty and manufacturing cost.
In order to achieve the above purpose, the utility model adopts the technical scheme that:a power coupling system of a hybrid electric vehicle comprises an engine, a power coupling module, an energy storage flywheel, a flywheel brake and a speed changing/reducing mechanism. Wherein the power coupling module comprises a control motor, a single-row planetary gear mechanism and a reduction gear Z 1 And a reduction gear Z 2 . An engine without a flywheel is directly connected with a planet carrier of the single-row planetary gear mechanism through an output shaft; the planet carrier is in transmission connection with the speed changing/reducing mechanism so as to output power; the control motor is connected with the sun wheel; the energy storage flywheel passes through a reduction gear Z 1 And a reduction gear Z 2 Is in transmission connection with the gear ring.
The utility model has the advantages that: the power coupling module composed of the control motor and the single-row planetary gear mechanism replaces a common stepless speed changer by adopting an integrated system, the response speed is higher, and the energy storage/release energy of the energy storage flywheel can be adjusted by changing the rotating speed and the torque of the control motor; the energy of the energy storage flywheel does not need to be converted, and can be directly input/output in a mechanical energy form through the coordination control of the planetary gear mechanism and the control motor, so that the energy efficiency of the system is improved; the energy storage flywheel and the engine can be in power coupling through the single-row planetary gear mechanism, so that the acceleration and the climbing performance of the vehicle are improved; when the load suddenly changes, the motor can be controlled to adjust the charging/discharging of the energy storage flywheel to filter the load fluctuation so as to stabilize the working condition of the engine and achieve the effects of energy conservation and emission reduction.
Drawings
Fig. 1 is a schematic diagram of a power coupling system of a hybrid electric vehicle.
The designations in the figures mean: 1-an engine; 2-a power coupling module; 3-single row planetary gear mechanism; 4-a planet carrier; 5, a gear ring; 6-reduction gear Z 1 (ii) a 7-energy storage flywheel; 8-flywheel brake; 9-a wheel; 10-a differential; 11-speed change/reduction mechanism; 12-reduction gear Z 2 (ii) a 13-a planet wheel; 14-sun gear; 15-controlling the motor; 16-output shaft.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
As shown in FIG. 1The power coupling system of the hybrid electric vehicle comprises an engine 1, a power coupling module 2, an energy storage flywheel 7, a flywheel brake 8 and a speed change/reduction mechanism 11. Wherein the power coupling module 2 comprises a control motor 15, a single-row planetary gear mechanism 3 and a reduction gear Z 1 6 and reduction gear Z 2 12. The engine 1 without the flywheel is directly connected with the planet carrier 4 of the single-row planetary gear mechanism 3 through an output shaft 16; the planet carrier 4 is in transmission connection with a speed changing/reducing mechanism 11 so as to output power; the control motor 15 is connected with the sun gear 14 of the single-row planetary gear mechanism 3; the energy storage flywheel 7 passes through a reduction gear Z 1 6 and reduction gear Z 2 12 is in driving connection with the ring gear 5 of the single-row planetary gear mechanism 3.
In the actual running process of the vehicle, the working state of the system can be divided into the following modes:
starting mode: when the vehicle is cold started, the planetary gear 13 is locked, the sun gear 14, the planet carrier 4 and the ring gear 5 are relatively static and rotate at the same direction and speed, the control motor 15 outputs positive torque, power is transmitted to the engine 1 through the sun gear 14, the planetary gear 13, the planet carrier 4 and the output shaft 16, and the rotation speed is gradually increased to the starting rotation speed of the engine 1 so as to start the engine; while the power of the control motor 15 is transmitted through the ring gear 5, the reduction gear Z 1 6 and reduction gear Z 2 12 to the energy storage flywheel 7, so that the energy storage flywheel 7 has initial rotational kinetic energy, and at this time, the energy storage flywheel 7 has the same function of stabilizing the engine speed as the original engine flywheel; after the engine 1 is normally started, the planet wheel 13 is unlocked, each component of the single-row planetary gear mechanism 3 enters a differential operation state, in order to ensure that the engine 1 stably operates, the rotating speed of the control motor 15 is gradually reduced, the output torque is increased, the rotating speed of the energy storage flywheel 7 is increased, after the rotating speed of the engine 1 is stabilized, the rotating speeds of the control motor 15 and the energy storage flywheel 7 are not changed any more, and the engine 1 enters an idling state.
Constant-speed cruise mode: when the vehicle runs at a constant speed, the control motor 15 stops working and idles at the same speed, the energy storage flywheel 7 does not have energy input/output and rotates at the constant speed, the control motor 15 and the energy storage flywheel 7 do not participate in power output, the vehicle is driven by the engine 1 independently, and at the moment, the engine 1 works in a high-efficiency low-emission area.
Dynamic coupling mode 1: when the vehicle is accelerated to overtake or climb a slope, the control motor 15 outputs positive torque, the rotating speed is gradually increased, the rotating speed of the energy storage flywheel 7 is reduced to release energy under the control of the positive torque, and the kinetic energy stored by the energy storage flywheel 7 is transmitted through the reduction gear Z 1 6 and reduction gear Z 2 12. After the gear ring 5, the planet wheel 13 and the planet carrier 4 are coupled with the output power of the engine 1, the output power is finally transmitted to the wheels 9 through the output shaft 16 and the vehicle speed changing/reducing mechanism 11, the vehicle is driven to advance together, and the acceleration and climbing performance of the vehicle is improved. The vehicle acceleration or climbing process is finished, the rotating speed of the control motor 15 is gradually reduced, the rotating speed of the energy storage flywheel 7 is increased, and after the vehicle speed is recovered to the speed before overtaking or climbing, the rotating speeds of the control motor 15 and the energy storage flywheel 7 are not changed any more.
Kinetic energy recovery mode: when the vehicle slows down a slope or brakes and decelerates, the sun gear 14 and the gear ring 5 are used as input components, the planet carrier 4 is used as an output component, the control motor 15 outputs braking torque, the rotating speed is gradually reduced, the vehicle works in a generator state, the rotating speed of the energy storage flywheel 7 is increased, and the stored energy is increased. A part of the kinetic energy of the vehicle body is divided to the control motor 15 through the output shaft 16, the planet carrier 4, the planet wheel 13 and the sun wheel 14, and the part of the kinetic energy of the vehicle body is converted into electric energy by the control motor 15 and stored in a vehicle-mounted battery; one branch passes through the output shaft 16, the planet carrier 4, the planet wheel 13, the gear ring 5 and the reduction gear Z 1 6 and reduction gear Z 2 12 to the energy storage flywheel 7, the energy storage flywheel 7 directly stores the part of the kinetic energy of the vehicle body in the form of mechanical energy, so that the rotating speed is increased, and the vehicle speed is reduced. In order to ensure the safety of the system, when the rotating speed of the energy storage flywheel 7 reaches the highest set value, the kinetic energy recovery stage of the vehicle body is finished, the rotating speed of the energy storage flywheel 7 is not increased any more, and the control motor 15 stops working and idles at the same speed.
Dynamic coupling mode 2: moment of resistance on the output shaft 16 in the event of sudden load increaseWhen the power is suddenly increased, the control motor 15 outputs positive torque, the rotating speed is gradually increased, the energy storage flywheel 7 also outputs positive torque, the rotating speed is reduced to release energy, the power of the control motor and the rotating speed is coupled by the single-row planetary gear mechanism 3 and then transmitted to the output shaft 16, additional power is provided for a vehicle, the output stability of the engine 1 is ensured, and the fuel consumption and the emission are reduced; when the load is suddenly reduced, in order to ensure that the rotating speed of the engine 1 is stable, the control motor 15 outputs braking torque, the rotating speed is gradually reduced, and the instantaneous overflow power of the engine 1 is transmitted through the planet carrier 4, the planet wheel 13, the gear ring 5 and the reduction gear Z 1 6 and reduction gear Z 2 12 are stored in the energy storage flywheel 7, and the rotating speed of the energy storage flywheel 7 rises after the part of the instantaneous overflow power is recovered.
Temporary parking mode: when the vehicle is temporarily stopped, the engine 1 is switched off, the planet carrier 4 is in a static state, the control motor 15 does not output torque, and idles in the reverse direction along with the speed, and the energy storage flywheel 7 rotates freely in a no-load state; when the vehicle is restarted, the control motor 15 outputs positive torque, the reverse rotating speed is gradually reduced, the rotating speed of the energy storage flywheel 7 is reduced, and the released mechanical energy passes through the reduction gear Z 1 6 and reduction gear Z 2 12. The ring gear 5, the planet wheels 13, the planet carrier 4, the output shaft 16 are transmitted to the engine 1, which is started directly. After the engine 1 enters normal idling operation, the rotating speed and the torque of the control motor 15 and the energy storage flywheel 7 are not changed any more.
A parking mode: after the vehicle is flamed out, the rotating speed of the engine 1 is zero, the planet carrier 4 is in a static state, the flywheel brake 8 is closed, the rotating speed of the energy storage flywheel 7 is gradually reduced, and the control motor 15 works in a generator state. Part of kinetic energy generated during the deceleration of the energy storage flywheel 7 is transmitted through the reduction gear Z 1 6 and reduction gear Z 2 12. The gear ring 5, the planet wheel 13 and the sun wheel 14 are transmitted to the control motor 15, and the control motor 15 converts the electric energy into electric energy to be stored in a vehicle-mounted battery until the energy storage flywheel 7 completely stops rotating.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, as any person skilled in the art can use the principles of the present invention to modify or modify other embodiments with equivalent variations. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are all included in the scope of the patent protection of the present invention.
Claims (2)
1. A power coupling system of a hybrid electric vehicle is characterized in that: the power coupling system of the hybrid electric vehicle comprises an engine, a power coupling module, an energy storage flywheel, a flywheel brake and a speed change/reduction mechanism, wherein the power coupling module comprises a control motor, a single-row planetary gear mechanism and a reduction gear Z 1 And a reduction gear Z 2 (ii) a An engine without a flywheel is directly connected with a planet carrier of the single-row planetary gear mechanism through an output shaft; the planet carrier is in transmission connection with the speed changing/reducing mechanism so as to output power; the control motor is connected with a sun gear of the single-row planetary gear mechanism; the energy storage flywheel passes through a reduction gear Z 1 And a reduction gear Z 2 And the gear ring of the single-row planetary gear mechanism is in transmission connection.
2. The power coupling system of a hybrid vehicle according to claim 1, wherein: the flywheel brake is connected with the energy storage flywheel in a matching mode so as to brake the energy storage flywheel when necessary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220865822.6U CN218316238U (en) | 2022-04-14 | 2022-04-14 | Power coupling system of hybrid electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220865822.6U CN218316238U (en) | 2022-04-14 | 2022-04-14 | Power coupling system of hybrid electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN218316238U true CN218316238U (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220865822.6U Active CN218316238U (en) | 2022-04-14 | 2022-04-14 | Power coupling system of hybrid electric vehicle |
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| CN (1) | CN218316238U (en) |
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2022
- 2022-04-14 CN CN202220865822.6U patent/CN218316238U/en active Active
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