CN211663051U - Hybrid electric drive device - Google Patents
Hybrid electric drive device Download PDFInfo
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- CN211663051U CN211663051U CN202020201480.9U CN202020201480U CN211663051U CN 211663051 U CN211663051 U CN 211663051U CN 202020201480 U CN202020201480 U CN 202020201480U CN 211663051 U CN211663051 U CN 211663051U
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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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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/84—Data processing systems or methods, management, administration
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Abstract
The utility model provides a hybrid electric drive device, which comprises an engine; the hydraulic torque converter comprises a pump impeller, a turbine and a locking clutch; a first motor and a second motor; a power splitting mechanism comprising at least one planet row having an input, a first output and a second output; the engine is connected with the pump wheel, the turbine is connected with the input end connected with the power dividing mechanism, the first motor is connected with the first output end, the second output end is connected with the front wheel or the rear wheel to drive the vehicle, and the second motor is connected with the front wheel or the rear wheel to drive the vehicle; the utility model discloses a hybrid electric drive device has increased the hydraulic torque converter of area lockup clutch through between engine and power split mechanism to obtain a hybrid electric drive device of reinforcing dynamic nature.
Description
[ technical field ]
The utility model relates to a vehicle drive technical field especially relates to a hybrid electric drive device.
[ background art ]
The power of the engine is decomposed into two paths of power by the power splitting planetary row, the first path of power drives the first motor to generate power to supply power to the second motor or charge the power storage device, the second path of power drives wheels, and the second motor also provides power to converge with the second path of power to drive the wheels together. The first motor is mainly used for adjusting the rotating speed of the engine so as to decouple the rotating speed of the engine from the rotating speed of wheels, and the second motor is mainly used for adjusting the driving torque required by the vehicle so as to meet the power requirement of the vehicle in running.
However, since the power of the engine is reduced after passing through the power splitting planetary row, that is, the second power is k Te/(1+ k) (note that k is a structural characteristic parameter of the splitting planetary row, Te is an engine output torque, and when k is 2.6, the second power is only 0.7Te), the driving torque of the vehicle is mainly provided and adjusted by the second motor, that is, the engine does not contribute much to the driving torque of the vehicle directly, and a higher requirement is also provided for the second motor, a speed expanding ratio (that is, a maximum rotation speed in a constant power region/a maximum rotation speed in a constant torque region) of the second motor is required to be close to 4, and a torque ratio of the maximum torque of the second motor to the second power reaches 4 Te: 0.7Te, and in order to obtain a high rotation speed region with high efficiency, a step-up/step-down DC-DC converter needs to be provided, so that the power electronic topology of the hybrid electric drive device is complicated.
In addition, for four-wheel drive vehicles, it is common to include a hybrid electric drive to drive the front wheels and a third, lower power electric motor to drive the rear wheels, further increasing the complexity of the power electronics topology and limiting four-wheel drive performance.
It is therefore also desirable to provide a power-split hybrid electric drive that at least simplifies the power electronics topology.
[ contents of utility model ]
For overcoming the problem that prior art exists, the utility model provides a simplify power electronic topology's power shunting hybrid electric drive device.
The utility model provides a hybrid electric drive device, which comprises an engine; the hydraulic torque converter comprises a pump impeller, a turbine and a locking clutch; a first motor and a second motor; a power splitting mechanism comprising at least one planet row having an input, a first output and a second output; the engine with the pump impeller is connected, the turbine with the input that power split mechanism connects is connected, first motor with first output is connected, the second output is connected with front wheel or rear wheel in order to drive the vehicle, the second motor with the front wheel or the rear wheel is connected in order to drive the vehicle.
Preferably, the power split mechanism comprises a first planet row and a second planet row; the first planet row comprises a first sun gear, a first planet carrier and a first gear ring; the second planet row comprises a second sun gear, a second planet carrier and a second gear ring; the first planet carrier is connected with the second sun gear, the first gear ring is connected with the second gear ring, the first planet carrier serves as the input end, the first sun gear serves as the first output end, and the second planet carrier serves as the second output end.
Preferably, the power split mechanism further includes a brake for locking the first ring gear or the second ring gear.
Preferably, the hybrid electric drive has a sport mode and an economy mode.
Preferably, when the driver selects the sport mode, the lockup clutch is disengaged, the brake is locked, and the power of the engine after passing through the torque converter and the power of the first motor after being converged by the power splitting mechanism is transmitted to the front wheel or the rear wheel through the second output end; when the locking clutch is locked according to a set condition, the power of the engine and the power of the first motor are converged by the power splitting mechanism and then transmitted to the second output end; meanwhile, the second motor drives the front wheel or the rear wheel.
Preferably, when the driver selects the economy mode, the lockup clutch is engaged, the brake is disengaged, and the power of the engine is split into two power flows after passing through the power split mechanism, one power flow is transmitted to the first motor from the first output end, and the other power flow is transmitted to the front wheels or the rear wheels from the second output end; meanwhile, the second motor drives the front wheel or the rear wheel.
Preferably, the output end is connected with the front wheel, the second motor is connected with the rear wheel, and the hybrid electric drive device further has a four-wheel drive mode.
Preferably, when the driver selects the four-wheel drive mode, the locking clutch is disengaged, the brake is locked, and the power of the engine is transmitted to the front wheel by the second output end after being converged by the power splitting mechanism and the power of the first motor after passing through the hydraulic torque converter; when the locking clutch is locked according to a set condition, the power of the engine and the power of the first motor are converged by the power splitting mechanism and then transmitted to the front wheel through the second output end; simultaneously, the second motor drives the rear wheel.
Compared with the prior art, the utility model discloses a hybrid electric drive device is through having increased the torque converter of taking the lockup clutch between engine and power split mechanism to obtain a hybrid electric drive device who simplifies power electronic topological structure.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a hybrid electric drive device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the power splitting mechanism of the embodiment shown in FIG. 1;
fig. 3 is a schematic structural diagram of a hybrid electric drive device according to another embodiment of the present invention.
[ detailed description of the invention ]
To make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the hybrid electric drive device 100 includes an engine 1; a torque converter 2 including a pump impeller 21, a turbine runner 22, and a lockup clutch 23; a first motor 3; a power splitting mechanism 4 comprising at least one planetary row having an input 4i, a first output 4o1 and a second output 4o 2; a second motor 5; the engine 1 is connected with the pump impeller 21, the turbine 22 is connected with the input end 4i of the power dividing mechanism 4, the first motor 3 is connected with the first output end 4o1, the second output end 4o2 is connected with the front wheel 6 or the rear wheel 7 to drive the vehicle, and the second motor is connected with the front wheel 6 or the rear wheel 7 to drive the vehicle.
The maximum torque ratio of the existing hydraulic torque converter is about 3, the power of an engine is amplified by the hydraulic torque converter and then reduced by the power dividing mechanism, the structural characteristic parameter of the planet row is also 2.6, the second path of power can reach 2.2Te, the maximum torque of the second motor can be reduced to 2.5Te, the speed expansion ratio can be reduced to 2.5, and a high-efficiency high-rotation-speed region can be easily realized even without the aid of voltage increasing/reducing Dc-DC, so that the power electronic topological structure of the hybrid electric drive device is simplified.
Because the hydraulic torque converter is provided with the locking clutch, the locking clutch is locked under the running working condition of medium and low load, and the hybrid electric drive device drives the vehicle in a power splitting way, so that the good fuel economy and emission performance can be still ensured.
As shown in fig. 2, the power split mechanism 4 includes a first planetary row 41 and a second planetary row 42; the first planetary row 41 includes a first sun gear 411, a first carrier 412, and a first ring gear 413; the second planetary row 42 includes a second sun gear 421, a second carrier 422, and a second ring gear 423; the first carrier 412 is connected to the second sun gear 421, the first ring gear 413 is connected to the second ring gear 423, the first carrier 412 serves as the input 4i, the first sun gear 411 serves as the first output 4o1, and the second carrier 422 serves as the second output 4o 2.
The power split mechanism 4 may be a double planetary row. The power split mechanism 4 includes a first planetary gear row 41 and a second planetary gear row 42, and splits the power of the engine 1 input by the first carrier 412 into two paths, i.e., the first path of power is output by the first sun gear 411 to drive the first motor 3 to generate power, and the second path of power is output by the second carrier 422 to drive the vehicle. From the kinematic equations of the first planetary row 41 and the second planetary row 42, the following equations (1) and (2) of kinematic and dynamic characteristics can be obtained after analysis:
Tout1:Tout2:Tin＝k2:k1(1+k2):-(k1+k2+k1k2) (2)
in the formula: n isout1、nout2、nin、Tout1、Tout2、Tin、k1、k2These are the rotational speed of the first output 4o1 (i.e. the first sun wheel 411), the rotational speed of the second output 4o2 (the second planet carrier 422), the rotational speed of the input 4i (i.e. the first planet carrier 412), the torque of the first output 4o1, the torque of the second output 4o2, the torque of the input 4i, the design parameters of the first planetary row 41 and the design parameters of the second planetary row 42, respectively.
It can be seen that the power splitting mechanism 4 can be regarded as an equivalent single planetary row, and the equivalent structural characteristic parameter ke thereof is
When k is selected1＝k2When 1.6, its ke is 2.6, the second power equivalent to a single planetary row is realized. When it is desired to increase the second power, k may be selected1＝k 22, ke is 3, and the second power is 0.75Te, so that a larger second power can be realized on the premise that the planet row has a smaller structural characteristic parameter, and the single planet row needs to increase the structural characteristic parameter to 3, so that a larger second power can be realized, and thus the radial dimension advantage is smaller.
The power splitting mechanism 4 may also be a single planetary row, which may be formed by a simple planetary row, or may also be formed by other types of compound planetary rows, which is not limited to this.
The power split mechanism 4 further includes a brake 43, and the brake 43 is used to lock the first ring gear 413 or the second ring gear 423. When the first ring gear 413 or the second ring gear 423 is locked by the brake 43, the power split mechanism 4 functions only as a speed reducer for the output of the engine 1, and the speed ratio thereof is:
1+k2(3)
for the output of the first motor 3, the power split mechanism 4 only functions as a speed reducer, and the speed ratio thereof is:
(1+k1)(1+k2) (4)
therefore, at low speed, the driving force of the vehicle can be significantly increased, the torque of the engine 1 is amplified by the torque converter 2 and then amplified by the power split mechanism 4, and the torque of the first electric machine 3 can be amplified by the power split mechanism 4 and then converged to drive the vehicle, so that the driving force at low speed is significantly increased, and the requirements for starting and climbing or rapid acceleration can be satisfied.
When k is selected1＝k2When 1.6 is satisfied, the reduction ratio of the power split mechanism 4 to the power of the engine 1 is 2.6, and if the maximum torque ratio 3 of the torque converter 2 is taken into consideration, the second power can reach 7.8 Te; the reduction gear ratio of the power split mechanism 4 to the output torque of the first motor 3 is 6.76, and even if the maximum torque of the first motor 3 is set to half the engine torque, the power can reach 3.4Te, and 11.2Te can be obtained when it is superimposed with the second power, and the drive torque is significantly increased.
Hybrid electric drive 100 has a sport mode and an economy mode. The exercise mode is a power mode for providing a feeling of pushing back with emphasis on the object of shortening the acceleration time. The economy mode, i.e., the energy saving mode with low energy consumption as the target, emphasizes the fuel saving. A two-position button with printed ECO and SPORT characters is usually provided near the shift handle to allow the driver to select one of the modes when starting.
When the driver selects the sport mode, the locking clutch 23 is disengaged, the brake 43 is locked, the power of the engine 1 passes through the torque converter 2, then is converged with the power of the first motor 3 through the power splitting mechanism 4, and then is transmitted to the front wheel 6 or the rear wheel 7 through the second output end 4o 2; when the lockup clutch 23 is locked according to a set condition, the power of the engine 1 and the power of the first motor 3 are converged by the power splitting mechanism 4 and then transmitted to the front wheel 6 or the rear wheel 7 through the second output end 4o 2; at the same time, the second motor 4 drives either the front wheels 6 or the rear wheels 7.
When the economy mode is selected by the driver, the lockup clutch 23 is engaged, the brake 43 is disengaged, the power of the engine 1 is split into two power flows after passing through the power split mechanism 4, one power flow is transmitted to the first motor 3 from the first output terminal 4o1, and the other power flow is transmitted to the front wheels 6 or the rear wheels 7 from the second output terminal 4o 2; at the same time, the second motor 5 drives either the front wheels 6 or the rear wheels 7.
The vehicle on which the hybrid device 100 is mounted may be configured as a four-wheel drive vehicle. As shown in fig. 3, the second output terminal 4o2 is connected to the front wheel 6, the second motor 5 is connected to the rear wheel 7, and the hybrid electric drive device 100 further has a four-wheel drive mode.
As described above, the power of the second motor 3 and/or the power of the first motor 3 can drive the front wheels 6, the power of the second motor 5 can drive the rear wheels 7, the front wheels 6 can obtain 7.8Te or 11.2Te driving torque, and the second motor 5 can obtain 2.5Te driving torque, so that the four-wheel drive performance of the vehicle is significantly enhanced, which is obtained without using a central propeller shaft and a transfer case, i.e., the power performance of the vehicle is improved under the condition of simplifying a part of the mechanical structure.
When the driver selects the four-wheel drive mode, the locking clutch 23 is disengaged, the brake 43 is locked, the power of the engine 1 passes through the hydraulic torque converter 2, then is converged with the power of the first motor 3 through the power splitting mechanism 4, and then is transmitted to the front wheels 6 through the second output end 4o 2; when the lockup clutch 23 is locked according to the set conditions, the power of the engine 1 and the power of the first motor 3 are converged by the power splitting mechanism 4 and then transmitted to the front wheel 6 through the second output end 4o 2; at the same time, the second motor drives the rear wheel 7.
Further, the second output terminal 4o2 may be connected to the rear wheel 7 and the second motor 5 may be connected to the front wheel 6, and therefore, it is possible to configure other types of all-wheel drive vehicles, and the configuration is not limited to this.
The utility model discloses embodiment's hybrid electric drive device has increased the torque converter of area lockup clutch through between engine and power split mechanism to obtain a hybrid electric drive device of reinforcing dynamic nature.
The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A hybrid electric drive device is characterized by comprising an engine; the hydraulic torque converter comprises a pump impeller, a turbine and a locking clutch; a first motor and a second motor; a power splitting mechanism comprising at least one planet row having an input, a first output and a second output; the engine with the pump impeller is connected, the turbine with the input that power split mechanism connects is connected, first motor with first output is connected, the second output is connected with front wheel or rear wheel in order to drive the vehicle, the second motor with the front wheel or the rear wheel is connected in order to drive the vehicle.
2. The hybrid electric drive of claim 1 wherein said power splitting mechanism includes a first planetary row and a second planetary row; the first planet row comprises a first sun gear, a first planet carrier and a first gear ring; the second planet row comprises a second sun gear, a second planet carrier and a second gear ring; the first planet carrier is connected with the second sun gear, the first gear ring is connected with the second gear ring, the first planet carrier serves as the input end, the first sun gear serves as the first output end, and the second planet carrier serves as the second output end.
3. The hybrid electric drive of claim 2 wherein said power split mechanism further comprises a brake for locking said first ring gear or said second ring gear.
4. The hybrid electric drive of claim 3, wherein said hybrid electric drive has a sport mode and an economy mode.
5. The hybrid electric drive device according to claim 4, wherein when a driver selects a sport mode, the lockup clutch is disengaged, the brake is locked, and the power of the engine after passing through the torque converter is converged with the power of the first electric motor by the power split mechanism and then transmitted to the front wheel or the rear wheel from the second output terminal; when the locking clutch is locked according to a set condition, the power of the engine and the power of the first motor are converged by the power splitting mechanism and then transmitted to the second output end; meanwhile, the second motor drives the front wheel or the rear wheel.
6. The hybrid electric drive of claim 4, wherein when an economy mode is selected by a driver, said lockup clutch is engaged, said brake is disengaged, power from said engine is split into two power flows after passing through said power split mechanism, one power flow being delivered from said first output terminal to said first electric motor, the other power flow being delivered from said second output terminal to said front wheels or said rear wheels; meanwhile, the second motor drives the front wheel or the rear wheel.
7. A hybrid electric drive as set forth in claim 3 wherein said output is connected to said front wheels and said second electric motor is connected to said rear wheels, said hybrid electric drive further having a four wheel drive mode.
8. The hybrid electric drive device according to claim 7, wherein when a four-wheel drive mode is selected by a driver, said lockup clutch is disengaged, said brake is locked, and power of said engine is transmitted to said front wheels through said second output terminal after being converged with power of said first electric motor through said power split mechanism after passing through said torque converter; when the locking clutch is locked according to a set condition, the power of the engine and the power of the first motor are converged by the power splitting mechanism and then transmitted to the front wheel through the second output end; simultaneously, the second motor drives the rear wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020201480.9U CN211663051U (en) | 2020-02-24 | 2020-02-24 | Hybrid electric drive device |
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| CN202020201480.9U CN211663051U (en) | 2020-02-24 | 2020-02-24 | Hybrid electric drive device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112848874A (en) * | 2021-03-10 | 2021-05-28 | 苏州亚太金属有限公司 | Low-cost hybrid power system with good working condition coverage degree and driving method thereof |
| CN112848872A (en) * | 2021-03-10 | 2021-05-28 | 苏州亚太金属有限公司 | Low-cost hybrid power system convenient for adjusting vehicle speed and driving method thereof |
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2020
- 2020-02-24 CN CN202020201480.9U patent/CN211663051U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112848874A (en) * | 2021-03-10 | 2021-05-28 | 苏州亚太金属有限公司 | Low-cost hybrid power system with good working condition coverage degree and driving method thereof |
| CN112848872A (en) * | 2021-03-10 | 2021-05-28 | 苏州亚太金属有限公司 | Low-cost hybrid power system convenient for adjusting vehicle speed and driving method thereof |
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