CN212422802U - Planetary shunting coupling power system of hybrid electric vehicle - Google Patents
Planetary shunting coupling power system of hybrid electric vehicle Download PDFInfo
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- CN212422802U CN212422802U CN202020528840.6U CN202020528840U CN212422802U CN 212422802 U CN212422802 U CN 212422802U CN 202020528840 U CN202020528840 U CN 202020528840U CN 212422802 U CN212422802 U CN 212422802U
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Abstract
The utility model discloses a planet shunting coupling power system of a hybrid electric vehicle, an engine and a motor respectively drive a planet mechanism, the planet mechanism drives a middle input gear, the middle input gear drives another motor, a middle output gear drive differential mechanism is used for outputting power, the engine and the motor jointly drive with the planet mechanism in a shunting coupling way, on the basis of ensuring the output of strong torque in a middle-low speed state, the power advantage of the motor is exerted in a middle-high speed section to achieve good power complementation, two motors switch a driving mode and a power generation mode back and forth in different use scenes, a controller adjusts the working states of the engine and the motor according to the actual driving condition of the vehicle, an accelerator pedal position signal, the electric quantity state of a vehicle-mounted power supply, a motor efficiency section and an engine combustion efficiency section to achieve the best power effect and energy-saving effect, the whole power system has the advantages of simple transmission, simple structure, high transmission efficiency, high reliability and high energy-saving rate.
Description
Technical Field
The utility model belongs to vehicle driving system specifically relates to a driving system based on planetary mechanism reposition of redundant personnel coupling engine and motor.
Background
At present, the battery technology is still immature, and the phenomena of long charging time, insufficient cruising ability, high-speed acceleration and hypodynamia of the pure electric vehicle still make consumers stop, so that the hybrid power is a good solution. Compared with the traditional automobile, the engine of the hybrid electric vehicle not only can be used as a power source to output power, but also can drive the motor to generate electricity. Because of the existence of the motor, the engine mainly works near the optimal working condition point, the combustion is sufficient, and the combustion efficiency is greatly improved. The hybrid electric vehicle mainly depends on the strong torque output of the motor at the middle and low speed stages and exerts the power advantage of the motor at the middle and high speed stages so as to achieve good power complementation.
At present, the conditions of domestic autonomous hybrid power assembly research and development are approximately as follows: first, foreign automotive plants have studied hybrid powertrain for a long time, and the products proposed have been well-developed, highly reliable, and have formed respective technical barriers to patents. The development and the starting of domestic hybrid electric vehicles are slow, and the technical barriers of foreign manufacturers are difficult to break through. Secondly, the hybrid powertrain development difficulty is great. In order to break through the enclosure of foreign manufacturers, most hybrid electric vehicle power schemes released by the manufacturers in China are divided into two categories, 1, the hybrid electric vehicle power schemes are transformed in the original traditional power scheme, the overall transformation is small, the period is short, the cost is low, but the power performance and the energy-saving performance are relatively poor; 2. the design of a foreign hybrid scheme is referred, but unnecessary parts or functions are forced to be added due to the avoidance of patents, the whole body is too bulky, the cost is high, and the development period is long. Finally, innovative and effective autonomous hybrid powertrain solutions are lacking. Domestic automobile manufacturers prefer to invest in pure electric automobiles with lower technical thresholds, so that the layout of domestic hybrid electric automobiles is relatively less. However, the hybrid electric vehicle has high endurance mileage, high energy saving performance and strong power performance which are not possessed by the pure electric vehicle, and will be developed in the end as long as a suitable and reasonable hybrid power technical scheme which accords with the market is provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a hybrid vehicle planet reposition of redundant personnel coupling driving system that driving pattern is abundant, the transmission is succinct, simple structure, transmission efficiency is high, the reliability is high and the energy-saving rate is high.
In order to realize the above purpose, the utility model discloses a technical scheme be: a planetary shunt coupling power system of a hybrid electric vehicle comprises an engine and two motors, wherein the engine and one of the motors respectively drive a planetary mechanism, the planetary mechanism drives a middle input gear, the middle input gear drives the other motor, and a middle output gear drive differential mechanism which is coaxially mounted with the middle input gear is used for outputting power.
Preferably, the planetary mechanism is composed of a sun gear, a planetary gear, a gear ring and a planet carrier, wherein the sun gear is externally meshed with the transmission planetary gear, the planetary gear is internally meshed with the transmission gear ring, and the planetary gear coaxially transmits the planet carrier.
Preferably, the engine drives a ring gear, wherein one of the electric machines drives a sun gear; the planet carrier drives the intermediate input gear, which drives the other motor.
Preferably, the engine drives a sun gear, one of the motors drives a ring gear; the planet carrier drives the intermediate input gear, which drives the other motor.
Preferably, the sun wheel and the motor or the engine are provided with a brake disc through a driving shaft, and the brake disc is arranged in the inner cavity of the brake.
Preferably, the planet carrier has a planet carrier gear which drives the intermediate input gear.
Preferably, the planet wheel has two rows of gears, each row of gears being in mesh with a driving ring gear and a sun gear respectively.
By implementing the technical scheme, one engine and two motors are arranged to be mutually in shunt coupling transmission with the planetary mechanism, on the basis of ensuring that strong torque is output in a medium-low speed state, the medium-high speed stage exerts the power advantages of the motor so as to achieve good power complementation, the two motors switch a driving mode and a generating mode back and forth under different use scenes, the controller adjusts the working states of the motor and the engine according to the actual running condition of the automobile, an accelerator pedal position signal, the electric quantity state of a vehicle-mounted power supply, a motor efficiency interval and an engine fuel efficiency interval, the power system has the advantages that the best power effect and energy-saving effect are achieved, the whole power system is simple in transmission, simple in structure, high in transmission efficiency, high in reliability and high in energy-saving rate, all driving scenes of an automobile are covered, the peak power is high, the dynamic performance is strong, the endurance mileage is high, and the following beneficial effects are achieved:
1. the utility model discloses realize parking electricity generation mode, first motor individual drive mode, two motor combined drive mode, power split drive mode, engine and first motor combined drive mode, planetary mechanism coupling drive mode and energy recuperation mode as conventional mode;
2. the utility model also has the combined driving mode of the engine and the double motors as the motion mode or the escaping mode of the automobile, and realizes that the single driving mode of the second motor is used as the standby working mode when the first motor and the engine can not work normally;
3. the engine always works in the optimal working condition interval, and the surplus power can be recovered by the motor to compensate the electric energy of the whole vehicle;
4. when the brake of the utility model is used for braking the brake disc, the rotating speed of the brake disc is zero, no high-speed rotation brake exists, no pause and no depression exist in the braking process, and the energy loss is extremely low;
5. the second motor functions as a part of the ISG motor, and an engine starting motor is not required to be additionally arranged.
Drawings
FIG. 1 is a schematic diagram of a planetary split coupling power system of a hybrid electric vehicle.
In the figure: ICE-engine, EM 1-first electric machine, EM 2-second electric machine; 1-elastic shock absorber, 2-one-way clutch, 3-planet carrier, 4-brake disc, 5-brake, 6-differential, 7-left half shaft and 8-right half shaft; s1-engine drive shaft, S2-second motor drive shaft, S3-first motor shaft, S4-intermediate shaft; g1-sun gear, G2-planet gear, G3-ring gear, G4-planet carrier gear, G5-intermediate input gear, G6-first motor gear, G7-intermediate output gear, G8-differential gear.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the planetary split-flow coupling power system of the hybrid electric vehicle mainly comprises an engine, a motor, a planetary mechanism, a brake, an intermediate shaft assembly and a differential assembly. The engine ICE, the elastic shock absorber 1, the one-way clutch 2, the planetary mechanism, the second electric machine EM2, the brake disc and the brake are coaxially mounted, and are mutually mounted in parallel with the first electric machine EM1, the intermediate shaft assembly and the differential assembly.
The planetary mechanism is composed of a sun gear G1, planet gears G2, an inner gear ring G3 and a planet carrier 3, wherein the inner gear ring G3 is internally meshed with planet gears G2, the planet gears G2 are externally meshed with a sun gear G1, a plurality of planet gears G2 are uniformly distributed on the planet carrier 3, the planet carrier gear G4 is fixedly connected with or directly processed on the planet carrier 3, an inner gear ring G3 is fixedly connected with or directly processed on an engine driving shaft S1, the engine ICE is connected with the engine driving shaft S1 through an elastic shock absorber 1, a one-way clutch 2 is arranged on the engine driving shaft S1, the one-way clutch controls the engine driving shaft to rotate only according to the working rotation direction of the engine, and the.
The first motor EM1 is provided with a first motor shaft S3, and the first motor shaft S3 is fixedly connected with a first motor gear G6. The second motor EM2 is provided with a second motor driving shaft S2, and the second motor driving shaft S2 is fixedly connected with the sun gear G1.
The function of the brake disc is to brake or release the second motor drive shaft, so as to achieve the effect of braking or releasing the sun wheel. The brake disk 4 may be fixedly installed at the other end of the second motor driving shaft S2 or at the second motor driving shaft S2 between the second motor EM2 and the sun gear G1, and the brake disk 4 is installed at the inner cavity of the brake 5 with a certain gap. The brake is fixedly arranged on the driving system shell, and the type of the brake can be a hydraulic brake, an electromagnetic brake, a pneumatic brake and the like. When the brake is ready to brake the brake disc, the rotational speed of the brake disc is zero.
The intermediate shaft assembly is composed of an intermediate shaft S4, an intermediate input gear G5 and an intermediate output gear G7, wherein the intermediate input gear G5 is externally meshed with a planet carrier gear G4, and meanwhile, the intermediate input gear G5 is externally meshed with a first motor gear G6. The intermediate input gear G5 is fixedly connected with the countershaft S4, and the intermediate output gear G7 is directly machined or fixedly connected with the countershaft S4.
The differential assembly is composed of a differential gear G8, a differential 6, a left half shaft 7 and a right half shaft 8, the differential gear G8 is externally meshed with an intermediate output gear G7, a differential gear G8 is fixedly arranged on the differential 6, and the differential 6 outputs power through the left half shaft 7 and the right half shaft 8.
The utility model discloses there are following several kinds of conventional modes: the system comprises a parking power generation mode, a first motor single driving mode, a double-motor combined driving mode, a power splitting driving mode, an engine and first motor combined driving mode, a planetary mechanism coupling driving mode and an energy recovery mode.
In the parking power generation mode, the SOC value of the vehicle-mounted power supply is lower than a certain preset value, the brake releases the brake disc, the second motor starts the engine, the engine transmits the second motor to generate compensation electric energy, and the rotation direction of the engine and the second motor is opposite in the mode.
The first motor independent driving mode is suitable for normal working conditions below a medium speed, the brake releases the brake disc, the first motor drives the differential mechanism assembly to drive the automobile to run through the intermediate shaft assembly, and the second motor and the engine are in a closed state.
The double-motor combined driving mode is suitable for a large-torque working condition below a medium speed, the SOC value of the vehicle-mounted power supply is higher than a certain preset value, the brake releases the brake disc, the second motor drives the planet carrier to rotate in the same direction through the sun gear, the one-way clutch locks the engine driving shaft and the gear ring, the planet carrier drives the intermediate shaft assembly, the first motor drives the intermediate shaft assembly through the first motor gear, the intermediate shaft assembly is superposed with the power of the second motor and the power of the first motor to drive the automobile to run, and the engine is in a closed state.
The power-split driving mode is applicable to the following two: 1. under the working condition of large torque below the medium speed, and the SOC value of the vehicle-mounted power supply is lower than a certain preset value, the dual-motor combined driving mode is not suitable for being used; 2. the automobile is in a normal running working condition below a medium speed, and the SOC value of the vehicle-mounted power supply is lower than a certain preset value.
In the power split driving mode, the brake releases the brake disc, the engine drives the planet carrier to rotate in the same direction through the gear ring, and simultaneously drives the sun gear to rotate in the reverse direction to drive the second motor to generate electricity, the planet carrier drives the intermediate shaft assembly, the first motor drives the intermediate shaft assembly through the first motor gear, and the intermediate shaft assembly is superposed with the first motor and the power transmission differential mechanism assembly of the engine to drive the automobile to run.
The engine and the first motor are suitable for the automobile in a medium-high speed running working condition, the brake brakes the sun wheel through the locking brake disc, the second motor is in a closed state, the engine drives the gear ring to transmit power to the planet carrier to rotate in the same direction, and the planet carrier transmits the intermediate shaft assembly.
The engine and the first motor are in a combined driving mode, the first motor can be set into the driving mode according to requirements, the first motor drives the intermediate shaft assembly through the first motor gear, and the intermediate shaft assembly is superposed with the first motor and the power transmission differential assembly of the engine to drive the automobile to run.
The engine and the first motor are in a combined driving mode, the first motor can be set into a power generation mode according to requirements, the intermediate shaft assembly drives the automobile to run by using one part of power transmission differential assembly, and the intermediate shaft assembly transmits the other part of power to the first motor to generate power compensation electric energy.
The engine and the first motor are in a combined driving mode, the first motor can be set to be in a closed follow-up rotation state according to requirements, and the intermediate shaft assembly drives the power transmission differential assembly of the engine to drive the automobile to run.
The planetary mechanism coupling driving mode is suitable for a high-speed running working condition, the brake releases the brake disc, the engine drives the planet carrier to rotate in the same direction through the gear ring, meanwhile, the second motor also drives the planet carrier to rotate in the same direction through the sun gear, and the planet carrier drives the engine and the power of the second motor to drive the intermediate shaft assembly.
The planetary mechanism is coupled with a driving mode, the first motor can be set to be in the driving mode according to requirements, the first motor drives the intermediate shaft assembly through the first motor gear, and the intermediate shaft assembly is superposed with the first motor, the second motor and the power transmission differential assembly of the engine to drive the automobile to run.
The planetary mechanism is coupled with a driving mode, the first motor can be set into a power generation mode according to requirements, the intermediate shaft assembly drives a part of power transmission differential assembly to drive the automobile to run, and the intermediate shaft assembly transmits the other part of power to the first motor to generate power compensation electric energy.
The planetary mechanism is in a coupling driving mode, the first motor can be set to be in a closed follow-up rotation state according to requirements, and the intermediate shaft assembly drives the engine and the power transmission differential assembly of the second motor to drive the automobile to run.
The utility model discloses there are following several kinds of special operating mode drive modes: the engine and double-motor combined driving mode and the second motor independent driving mode.
The engine and double-motor combined driving mode is suitable for the working condition that an automobile outputs ultra-large torque, the brake releases a brake disc, the engine drives the planet carrier to rotate in the same direction through the gear ring, meanwhile, the second motor also drives the planet carrier to rotate in the same direction through the sun gear, the planet carrier drives the power transmission intermediate shaft assembly of the engine and the second motor, the first motor drives the intermediate shaft assembly through the first motor gear, and the intermediate shaft assembly is superposed with the power transmission differential assembly of the first motor, the second motor and the engine to drive the automobile to run.
The second motor independent driving mode is suitable for the special working condition that the first motor and the engine can not work normally, the brake releases the brake disc, the second motor rotates in the same direction through the sun gear transmission planet carrier, the one-way clutch locks the engine driving shaft and the gear ring, the planet carrier transmits the intermediate shaft assembly, the intermediate shaft assembly transmission differential assembly drives the automobile to run, and the engine is in a closed state.
The various modes of operation described above are described further below.
1. And (4) parking power generation mode. Under the condition of parking, after detecting that the SOC value of a vehicle-mounted power supply is lower than a certain preset value, a vehicle controller instructs a second motor (EM2) to obtain electric energy from the vehicle-mounted power supply to drive a sun gear G1 to rotate reversely (the rotation direction of the engine is positive rotation, otherwise, the rotation direction is reverse rotation), at the moment, a brake 5 keeps a state of releasing a brake disc 4, the rotating speed of a planet carrier is zero, the sun gear G1 transmits power to a planet gear G2 (positive rotation), the planet gear G2 transmits power to a gear ring G3 (positive rotation), at the moment, a one-way clutch allows an engine driving shaft S1 to rotate positively, the gear ring G3 transmits power to the engine (ICE) through the engine driving shaft S1 through an elastic shock absorber 1 until the.
After an engine (ICE) is started, a second motor (EM2) is converted into a power generation mode, the engine (ICE) transmits power to a gear ring G3 (forward rotation) through an elastic shock absorber 1, at the moment, the rotating speed of a planet carrier is zero, the gear ring G3 transmits the power to a sun gear G1 (reverse rotation) through a planet gear G2 (forward rotation), then a rotor of the second motor (EM2) is driven to rotate reversely to generate electric energy, and the electric energy is rectified by a motor controller and then stored in a vehicle-mounted power supply.
2. First motor (EM1) drive mode alone. When the automobile executes a normal starting action or is in a normal running condition below a medium speed, the brake 5 keeps a state of releasing the brake disc 4, the first motor (EM1) obtains electric energy from a vehicle-mounted power supply to drive the first motor gear G6 to rotate forwards (the rotating direction of the engine is the forward rotation, otherwise, the rotating direction is called as the reverse rotation), the first motor gear G6 transmits power to the intermediate input gear G5 (the reverse rotation), the intermediate input gear G5 drives the planet carrier gear G4 to rotate forwards, at the moment, the engine (ICE) is in a closing state, and the second motor (EM2) is in a closing follow-up rotation state. The intermediate input gear G5 transmits power to the intermediate output gear G7 (reverse rotation) through the intermediate shaft S4, the intermediate output gear G7 transmits power to the differential gear G8 (forward rotation), and the differential gear G8 transmits power to the left half shaft 7 and the right half shaft 8 through the differential gear 6 to drive wheels to rotate forwards (the wheels rotate forwards when the automobile moves forwards and rotate backwards when the automobile moves backwards).
3. And (4) a double-motor combined driving mode. This mode is applicable to the driving conditions: the vehicle is in a running working condition below a starting speed and a middle speed, the whole vehicle needs higher output torque, and the SOC value of the vehicle-mounted power supply is higher than a certain preset value.
At this time, the brake 5 keeps the state of releasing the brake disc 4, the second electric machine (EM2) obtains electric energy from the vehicle-mounted power supply to drive the sun gear G1 to rotate forwards (the rotating direction of the engine is the forward rotation, and vice versa), at this time, the rotating speed of the planet carrier 3 is zero or the forward rotation, the engine is in the off state, the sun gear G1 transmits power to the planet gears G2 (the reverse rotation), the rotating trend of the ring gear G3 is the reverse rotation, the one-way clutch does not allow the engine driving shaft S1 to rotate backwards, namely, the ring gear G3 to rotate backwards, the ring gear G3 is locked to provide reaction torque to the planet gears G2, therefore, the planet gears G2 transmit power to the planet carrier 3 (the forward rotation), the planet carrier 3 transmits power to the middle input gear G5 (the forward rotation) through the planet carrier gear G4 (the forward rotation), the first electric machine (EM1) obtains electric energy to transmit the first electric motor gear G6 to rotate forwards, the middle input gear G5 superposes power from the second motor (EM2) and the first motor (EM1) and then transmits the superposed power to the middle output gear G7 (reverse rotation) through the middle shaft S4, the middle output gear G7 transmits the power to the differential gear G8 (forward rotation), and the differential gear G8 transmits the power to the left half shaft 7 and the right half shaft 8 through the differential mechanism 6 to drive wheels to rotate forwards (the wheels rotate forwards when the automobile advances, and the wheels rotate backwards when the automobile backs).
4. Power split drive mode. The driving condition applicable to the mode is as follows: (1) under the working conditions that the automobile runs at a starting speed and below a middle speed, the finished automobile needs high output torque, and meanwhile, the SOC value of the vehicle-mounted power supply is lower than a certain preset value and is not suitable for a dual-motor combined driving mode; (2) the automobile is in a normal running working condition below a medium speed, and the SOC value of the vehicle-mounted power supply is lower than a certain preset value.
In this mode, the rotation speeds of the ring gear G3 and the carrier 3 satisfy the relation: wC < ZRwR (ZR + ZS).
In the formula: wR-ring gear G3 speed, wC-planet carrier 3 speed, wS-sun gear G1 speed, ZR-ring gear G3 internal tooth number, ZS-sun gear G1 tooth number.
At this time, the brake 5 keeps a state of releasing the brake disc 4, if the engine is in a closed state, the second electric machine (EM2) obtains electric energy from a vehicle-mounted power supply to drive the sun gear, at this time, the rotating speed of the planet carrier 3 is zero or rotates forwards (the rotating direction of the engine is the forward rotation, otherwise, the rotating direction is called the reverse rotation), the controller adjusts the steering direction and the rotating speed of the sun gear G1 according to the actual rotating speed of the planet carrier 3, the planetary gear G2 is enabled to overlap the power transmission gear ring G3 of the planet carrier 3 and the sun gear G1 to rotate forwards to the optimal starting rotating speed, and.
The engine (ICE) is in a working state, the engine (ICE) transmits power to the gear ring G3 (forwards) through the elastic shock absorber 1, the second motor (EM2) is converted into a power generation mode, power generation load moment is adjusted to guide the planetary mechanism to play a power splitting function to divide the power of the engine (ICE) into driving power and power generation power, the gear ring G3 transmits the power generation power to the sun gear G1 (backwards) through the planetary gear G2 (forwards), further the rotor of the second motor (EM2) is driven to reversely rotate to generate electric energy, the electric energy is preferably supplied to the first motor (EM1) for use after being rectified by the motor controller, and residual electric energy is stored in the vehicle-mounted power supply. The gear ring G3 transmits driving power to the planet carrier 3 (forward rotation) through the planet gear G2 (forward rotation), the planet carrier 3 transmits the driving power to the intermediate input gear G5 (reverse rotation) through the planet carrier gear G4 (forward rotation), the first motor (EM1) transmits the first motor gear G6 to rotate forward after obtaining electric energy, the first motor gear G6 transmits the power to the intermediate input gear G5 (reverse rotation), the intermediate input gear G5 transmits the driving power from the engine (ICE) and the power of the first motor (EM1) to the intermediate output gear G7 (reverse rotation) through the intermediate shaft S4 after overlapping, the intermediate output gear G7 transmits the power to the differential gear G8 (forward rotation), the differential gear G8 transmits the power to the left half shaft 7 and the right half shaft 8 through the differential gear 6 to drive the wheels to rotate forward (forward rotation when the automobile and reverse rotation when the automobile is backed up).
The controller adjusts the output power of the engine (ICE), the first motor (EM1) and the generated power of the second motor (EM2) according to the actual driving condition of the vehicle, the position signal of the accelerator pedal, the electric quantity state of the vehicle-mounted power supply, the efficiency interval of the motor and the fuel efficiency interval of the engine (ICE) so as to meet the driving requirement, the cruising requirement and the energy-saving requirement.
5. The engine is in a combined drive mode with the first electric machine. The driving condition applicable to the mode is as follows: the automobile is in a medium-high speed running working condition.
When the mode is executed, if the engine is in a closed state, the second motor (EM2) obtains electric energy from a vehicle-mounted power supply to drive the sun gear G1, the rotating speed of the planet carrier 3 is zero or rotates forwards (the rotating direction of the engine is the forward rotation, otherwise, the rotating direction is called as the reverse rotation), the controller adjusts the steering direction and the rotating speed of the sun gear G1 according to the actual rotating speed of the planet carrier 3, the planet gear G2 is enabled to overlap the power transmission gear ring G3 of the planet carrier 3 and the sun gear G1 to rotate forwards to the optimal starting rotating speed, and then the engine is ignited to start.
After the engine is started, the second electric machine (EM2) adjusts the rotation speed of the sun gear G1 to gradually drop to zero, at which time the controller instructs the brake 5 to lock the brake disc 4, and the sun gear G1 is locked.
In this mode, the rotation speeds of the ring gear G3 and the carrier 3 satisfy the relation: wC ═ ZRwR (ZR + ZS).
Engine (ICE) transmits power to ring gear G3 (corotation) through elastic shock absorber 1, ring gear G3 transmits power to planet wheel G2 (corotation), because sun gear G1 is locked, planet wheel G2 (corotation) transmits power to planet carrier 3 (corotation) under the reaction moment of sun gear G1, planet carrier 3 transmits power to middle input gear G5 (corotation) through planet carrier gear G4 (corotation), middle input gear G5 (counterrotation) transmits power to middle output gear G7 (counterrotation) through intermediate shaft S4, middle output gear G7 transmits power to differential gear G8 (corotation), differential gear G8 transmits power to left half-axle 7 and right half-axle 8 through differential gear 6 to drive wheels (wheels when the automobile advances forward, wheels when the automobile reverses when backing up).
At the moment, the controller adjusts the mode of the first motor (EM1) according to the actual running condition of the vehicle, the position signal of the accelerator pedal and the electric quantity state of the vehicle-mounted power supply:
if the automobile requires large torque output and the SOC value of the vehicle-mounted power supply is higher than a certain preset value, the first motor (EM1) is converted into a driving mode to drive the first motor gear G6 to rotate forwards, the first motor gear G6 transmits power to the intermediate input gear G5 (rotate backwards), and the intermediate input gear G5 drives the automobile to run after overlapping the driving power from the engine (ICE) and the power of the first motor (EM 1);
if the SOC value of the vehicle-mounted power supply is lower than a certain preset value, the first motor (EM1) is converted into a power generation mode, the middle input gear G5 (reverse rotation) transmits a part of power to the first motor gear G6 to drive a rotor (forward rotation) of the first motor (EM1) to generate electric energy, and the electric energy is stored in the vehicle-mounted power supply;
if no torque output or power generation requirement exists, the first electric machine (EM1) is turned off, and the rotor of the first electric machine (EM1) is in a free-following state.
The controller adjusts the states of the engine (ICE) and the first motor (EM1) according to the actual driving condition of the vehicle, the position signal of the accelerator pedal, the electric quantity state of the vehicle-mounted power supply, the efficiency interval of the motor and the fuel efficiency interval of the engine (ICE) so as to meet the driving requirement, the cruising requirement and the energy-saving requirement.
6. The planetary mechanism couples the drive modes. The driving condition applicable to the mode is as follows: the automobile is in a high-speed running working condition.
In this mode, the rotation speeds of the ring gear G3 and the carrier 3 satisfy the relation: wC > ZRwR (ZR + ZS).
Note that: the utility model discloses in, planetary mechanism coupling drive mode can only be linked drive mode or engine and bi-motor by engine and first motor and linked drive mode transition comes, therefore engine (ICE) all has been in operating condition, this moment, if stopper 5 is in the state of locking brake disc 4, the controller instructs stopper 5 release brake disc 4.
The engine (ICE) transmits power to the ring gear G3 (forward rotation) through the elastic shock absorber 1, and meanwhile, the second electric machine (EM2) maintains or converts the driving mode of forward rotation, and at the moment, if the rotation speed relations of the sun gear G1 and the ring gear G3 are as follows: wS < wR.
The rotation direction of the planetary gear G2 is changed to the forward direction, the ring gear G3 (forward rotation) transmits the power of an engine (ICE) to the planetary gear G2 (forward rotation), the sun gear G1 (forward rotation) transmits the power of a second motor (EM2) to the planetary gear G2 (forward rotation), the planetary gear G2 superposes the power from the engine (ICE) and the power of the second motor (EM2) and transmits the superposed power to the planet carrier 3 (forward rotation), the planet carrier 3 transmits the power to the intermediate input gear G5 (reverse rotation) through the planet carrier gear G4 (forward rotation), the intermediate input gear G5 (reverse rotation) transmits the power to the intermediate output gear G7 (reverse rotation) through the intermediate shaft S4, the intermediate output gear G7 transmits the power to the differential gear G8 (forward rotation), the differential gear G8 transmits the power to the left half shaft 7 and the right half shaft 8 through the differential gear to drive wheels to drive the wheels (forward rotation when the automobile.
At this time, if the relationship between the rotation speeds of the sun gear G1 and the ring gear G3 is: wS > wR.
The rotation direction of the planet wheel G2 is changed into reverse rotation, the ring gear G3 (forward rotation) transmits the power of an engine (ICE) to the planet wheel G2 (reverse rotation), the sun wheel G1 (forward rotation) transmits the power of a second motor (EM2) to the planet wheel G2 (reverse rotation), the planet wheel G2 superposes the power from the engine (ICE) and the power of the second motor (EM2) and transmits the superposed power to the planet carrier 3 (forward rotation), the planet carrier 3 transmits the power to the intermediate input gear G5 (reverse rotation) through the planet carrier gear G4 (forward rotation), the intermediate input gear G5 (reverse rotation) transmits the power to the intermediate output gear G7 (reverse rotation) through the intermediate shaft S4, the intermediate output gear G7 transmits the power to the differential gear G8 (forward rotation), and the differential gear G8 transmits the power to the left half shaft 7 and the right half shaft 8 through the differential gear 6 to drive wheels (wheels when the automobile moves forwards.
At the moment, the controller adjusts the mode of the first motor (EM1) according to the actual running condition of the vehicle, the position signal of the accelerator pedal and the electric quantity state of the vehicle-mounted power supply:
if the automobile requires large torque output and the SOC value of the vehicle-mounted power supply is higher than a certain preset value, the first motor (EM1) is converted into a driving mode, and an engine and double-motor combined driving mode is executed;
if the SOC value of the vehicle-mounted power supply is lower than a certain preset value, the first motor (EM1) is converted into a power generation mode, the middle input gear G5 (reverse rotation) transmits a part of power to the first motor gear G6 to drive the rotor (forward rotation) of the first motor (EM1) to generate electric energy, the electric energy is rectified by the motor controller and then preferentially supplied to the second motor (EM2) to be used, and the residual electric energy is stored in the vehicle-mounted power supply.
If no torque output or power generation requirement exists, the first electric machine (EM1) is turned off, and the rotor of the first electric machine (EM1) is in a free-following state.
The controller adjusts the output power of the engine (ICE), the output power of the second electric machine (EM2) and the state of the first electric machine (EM1) according to the actual driving condition of the vehicle, the position signal of the accelerator pedal, the electric quantity state of the vehicle-mounted power supply, the efficiency interval of the electric machine and the fuel efficiency interval of the engine (ICE) so as to meet the driving requirement, the cruising requirement and the energy-saving requirement.
7. And an engine and double-motor combined driving mode. This mode is applicable to the driving conditions: the automobile is in a working condition of outputting an overlarge torque.
If the engine is in a closed state, the brake 5 keeps/executes releasing of the brake disc 4, the second motor (EM2) obtains electric energy from a vehicle-mounted power supply to drive the sun gear G1, the rotating speed of the planet carrier 3 is zero or positive rotating (the rotating direction of the engine is positive rotating, otherwise, reverse rotating), the controller adjusts the steering direction and the rotating speed of the sun gear G1 according to the actual rotating speed of the planet carrier 3, the fact that the planet gear G2 overlaps the power transmission gear G3 of the planet carrier 3 and the sun gear G1 to rotate normally to the optimal starting rotating speed is guaranteed, and then the engine is ignited to start.
If the vehicle is in the power split drive mode, this mode is executed: the engine (ICE) is in a working state, the brake 5 keeps releasing the brake disc 4, the first electric machine (EM1) keeps a driving mode, the second electric machine (EM2) is switched into the driving mode, and the rotating direction is changed from reverse rotation to forward rotation.
If the automobile is in an engine and first motor combined driving mode: the engine (ICE) is in working condition, the brake 5 releases the brake disc 4, the first electric machine (EM1) is kept/switched to driving mode, the rotating direction is positive rotation, the second electric machine (EM2) is switched to driving mode, the rotating direction is positive rotation.
If the vehicle is in the planetary mechanism coupling drive mode, the mode is executed: the engine (ICE) is in a working state, the brake 5 keeps releasing the brake disc 4, the first electric machine (EM1) is switched into a driving mode, the rotating direction is in the forward direction, and the second electric machine (EM2) keeps the driving mode.
If the relationship between the rotation speeds of the sun gear G1 and the ring gear G3 is as follows: wS is less than wR, the rotation direction of the planet wheel G2 becomes positive; if the relationship between the rotation speeds of the sun gear G1 and the ring gear G3 is as follows: wS > wR, the direction of rotation of the planet G2 is reversed. At the moment, the planet wheel G2 transmits the power from the engine (ICE) and the power of the second motor (EM2) to the planet carrier 3 (forward rotation) after being superposed, the planet carrier 3 transmits the power to the intermediate input gear G5 (reverse rotation) through the planet carrier gear G4 (forward rotation), the first motor (EM1) drives the first motor gear G6 to rotate forward after obtaining electric energy, the first motor gear G6 transmits the power to the intermediate input gear G5 (reverse rotation), the intermediate input gear G5 transmits the power from the engine (ICE), after power of the second motor (EM2) and the first motor (EM1) is superposed, the power is transmitted to a middle output gear G7 (reverse rotation) through a middle shaft S4, the middle output gear G7 transmits the power to a differential gear G8 (forward rotation), and the differential gear G8 transmits the power to a left half shaft 7 and a right half shaft 8 through a differential mechanism 6 to drive wheels to rotate forwards (the wheels rotate forwards when the automobile advances and rotate backwards when the automobile backs).
The controller adjusts the output power of the engine (ICE), the second motor (EM2) and the first motor (EM1) according to the actual driving condition of the vehicle, the position signal of the accelerator pedal, the electric quantity state of the vehicle-mounted power supply and the performances of the motors and the engines so as to meet the driving requirement of ultra-large torque output.
8. Second motor (EM2) drive mode alone. Brake 5 keeps/executes releasing brake disc 4, second electric machine (EM2) obtains electric energy from vehicle power supply to drive sun gear G1 to rotate forward (the rotation direction of engine work is forward rotation, otherwise, the rotation direction is reverse rotation), at this time, the rotation speed of planet carrier 3 is zero or forward rotation, the engine is in a closed state, sun gear G1 transmits power to planet gear G2 (reverse rotation), the rotation trend of ring gear G3 is reverse rotation, one-way clutch does not allow engine driving shaft S1 to rotate backward, namely ring gear G3 to rotate backward, ring gear G3 is locked to provide reaction torque for planet gear G2, therefore, planet gear G2 transmits power to planet carrier 3 (forward rotation), planet carrier 3 transmits power to intermediate input gear G5 (reverse rotation) through planet carrier gear G4 (forward rotation), at this time, first electric machine (EM1) is in a closing follow-up rotation state, intermediate input gear G5 transmits power to intermediate output gear G7 (reverse rotation) through intermediate shaft 4, the intermediate output gear G7 transmits power to the differential gear G8 (forward rotation), and the differential gear G8 transmits power to the left half shaft 7 and the right half shaft 8 through the differential gear 6 to drive the wheels to rotate forward (forward rotation of the wheels when the automobile moves forward, and reverse rotation of the wheels when the automobile moves backward).
9. The pure electric drive energy recovery mode. When the automobile is in a first motor (EM1) single driving mode or a double-motor combined driving mode during braking deceleration or sliding, the brake 5 keeps/executes releasing of the brake disc 4, the first motor (EM1) and the second motor (EM2) are converted into a power generation mode, the whole automobile kinetic energy is transmitted to the differential 6 through the wheels (rotating forward) (the rotating direction of the engine is forward rotation, the wheels rotate forward when the automobile moves forward, and vice versa) through the left half shaft 7 and the right half shaft 8, the differential 6 transmits the kinetic energy to the intermediate output gear G7 (reverse rotation) through the differential gear G8 (forward rotation), the intermediate output gear G7 transmits the kinetic energy to the intermediate input gear G5 (reverse rotation) through the intermediate shaft S4, the intermediate input gear G5 (reverse rotation) transmits a part of the kinetic energy to the first motor (EM1) through the first motor gear G6 (forward rotation) to drive the rotor (forward rotation) of the first motor (EM1) to generate electric energy, and then the power is rectified by a motor controller and stored in a vehicle-mounted power supply. The middle input gear G5 (reverse rotation) transmits the other part of kinetic energy to the planet carrier 3 through the planet carrier gear G4 (forward rotation), at the moment, the controller adjusts the power generation load moment of the second motor (EM2), the planet carrier 3 transmits the kinetic energy to the sun gear G1 through the planet gear G2 to drive the rotor of the second motor (EM2) to generate electric energy, and the electric energy is rectified by the motor controller and then stored in the vehicle-mounted power supply.
10. The power split drives the energy recovery mode. When the automobile is in a power split driving mode during braking deceleration or sliding, the brake 5 keeps/executes releasing of the brake disc 4, the first electric machine (EM1) is converted into a power generation mode, the second electric machine (EM2) keeps the power generation mode, the whole automobile kinetic energy is transmitted to the differential mechanism 6 through the left half shaft 7 and the right half shaft 8 (the working rotating direction of the engine is positive rotation, the automobile is positive rotation when advancing, otherwise, the automobile is reverse rotation), the differential mechanism 6 transmits the kinetic energy to the intermediate output gear G7 (positive rotation) through the differential mechanism gear G8 (positive rotation), the intermediate output gear G7 transmits the kinetic energy to the intermediate input gear G5 (reverse rotation) through the intermediate shaft S4, the intermediate input gear G5 (reverse rotation) transmits a part of the kinetic energy to the first electric machine (EM1) through the first electric machine gear G6 (positive rotation) to drive the rotor (EM1) of the first electric machine to generate electric energy, and the electric energy is stored in the vehicle-, the middle input gear G5 (reverse rotation) transmits the other part of kinetic energy to the planet carrier 3 (forward rotation) through the planet carrier gear G4 (forward rotation), at the moment, the controller adjusts the output power of the engine (ICE) and the power generation load moment of the second motor (EM2), the planet carrier 3 transmits the kinetic energy to the sun gear G1 through the planet carrier G2 to drive the rotor of the second motor (EM2) to generate electric energy, and the electric energy is rectified by the motor controller and then stored in the vehicle-mounted power supply.
11. The engine drives an energy recovery mode in conjunction with the first electric machine. When the automobile is braked and decelerated or slides, the automobile is in a combined driving mode of an engine and a first motor, a brake 5 keeps a locking brake disc 4, a second motor (EM2) keeps a closed state, the engine (ICE) adjusts output power, the first motor (EM1) keeps/is converted into a power generation mode, the kinetic energy of the whole automobile is transmitted to a differential mechanism 6 through a left half shaft 7 and a right half shaft 8 in a forward rotation mode (the working rotation direction of the engine is forward rotation, the wheel is forward rotation when the automobile advances, and is reversely called), the differential mechanism 6 transmits the kinetic energy to a middle output gear G7 through a differential mechanism gear G8 (forward rotation), the middle output gear G7 transmits the kinetic energy to a middle input gear G5 (reverse rotation) through a middle shaft S4, the middle input gear G5 (reverse rotation) transmits the forward rotation kinetic energy to the first motor (EM1) through a first motor gear G6 (EM1) to drive a rotor (forward rotation) of the first, and then the power is rectified by a motor controller and stored in a vehicle-mounted power supply.
If the automobile speed is lower than the speed suitable for the engine and first motor combined driving mode, the automobile speed is converted into a power division driving energy recovery mode.
12. The planetary mechanism is coupled to drive the energy recovery mode. When the automobile is in a planetary mechanism coupling driving mode during braking deceleration or sliding, the first motor (EM1) keeps a power generation mode, the second motor (EM2) is converted into a power generation mode, the kinetic energy of the whole automobile is transmitted to the differential gear 6 through the left half shaft 7 and the right half shaft 8 (the kinetic energy of the whole automobile is transmitted to the intermediate output gear G7 (reverse rotation) through the differential gear G8 (forward rotation), the intermediate output gear G7 transmits the kinetic energy to the intermediate input gear G5 (reverse rotation) through the intermediate shaft S4, the intermediate input gear G5 (reverse rotation) transmits a part of the kinetic energy to the first motor (EM1) through the first motor gear G6 (forward rotation) to drive the rotor (EM1) of the first motor (EM1) to generate electric energy, and the electric energy is rectified by the motor controller and then stored in a vehicle-mounted power supply, the middle input gear G5 (reverse rotation) transmits the other part of kinetic energy to the planet carrier 3 (forward rotation) through the planet carrier gear G4 (forward rotation), the controller adjusts the output power of the engine (ICE) and the power generation load torque of the second motor (EM2), the planet carrier 3 transmits the kinetic energy to the sun gear G1 through the planet gear G2 to drive the rotor of the second motor (EM2) to generate electric energy, and the electric energy is rectified by the motor controller and then stored in the vehicle-mounted power supply.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (7)
1. The utility model provides a hybrid vehicle planet reposition of redundant personnel coupling driving system, includes an engine and two motors, its characterized in that: the engine and one of the motors respectively drive a planetary mechanism, the planetary mechanism drives an intermediate input gear, the intermediate input gear drives the other motor, and an intermediate output gear which is coaxially arranged with the intermediate input gear drives a differential mechanism to output power.
2. The hybrid vehicle planetary split coupling power system according to claim 1, characterized in that: the planetary mechanism is composed of a sun wheel, a planetary wheel, a gear ring and a planet carrier, wherein the sun wheel is externally meshed with the transmission planetary wheel, the planetary wheel is internally meshed with the transmission gear ring, and the planetary wheel coaxially transmits the planet carrier.
3. The hybrid vehicle planetary split coupling power system according to claim 2, characterized in that: the engine drives a gear ring, wherein one motor drives a sun gear; the planet carrier drives the intermediate input gear, which drives the other motor.
4. The hybrid vehicle planetary split coupling power system according to claim 2, characterized in that: the engine drives the sun gear, and one of the motors drives the gear ring; the planet carrier drives the intermediate input gear, which drives the other motor.
5. The hybrid vehicle planetary split coupling power system according to claim 2, characterized in that: the sun wheel and the motor or the engine are provided with a brake disc through a driving shaft, and the brake disc is arranged in an inner cavity of the brake.
6. The hybrid vehicle planetary split coupling power system according to claim 3 or 4, characterized in that: the planet carrier has a planet carrier gear which drives an intermediate input gear.
7. The hybrid vehicle planetary split coupling power system according to claim 2, characterized in that: the planet wheel is provided with two rows of gears, and each row of gears is respectively meshed with the transmission gear ring and the sun wheel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113320374A (en) * | 2021-07-16 | 2021-08-31 | 席忠 | Double-motor power converging hybrid power system |
| US11642956B1 (en) * | 2021-12-27 | 2023-05-09 | Hyundai Motor Company | Power transmission apparatus of hybrid electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113320374A (en) * | 2021-07-16 | 2021-08-31 | 席忠 | Double-motor power converging hybrid power system |
| US11642956B1 (en) * | 2021-12-27 | 2023-05-09 | Hyundai Motor Company | Power transmission apparatus of hybrid electric vehicle |
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