CN115703344A - Hybrid power system and vehicle with same - Google Patents
Hybrid power system and vehicle with same Download PDFInfo
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- CN115703344A CN115703344A CN202110938904.9A CN202110938904A CN115703344A CN 115703344 A CN115703344 A CN 115703344A CN 202110938904 A CN202110938904 A CN 202110938904A CN 115703344 A CN115703344 A CN 115703344A
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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
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
The invention discloses a hybrid power system and a vehicle with the same, comprising: an engine; the first planet row comprises a first sun gear, a first planet carrier, a first gear ring and a plurality of first planet gears, the first planet gears are meshed with the first sun gear and the first gear ring, and the first planet carrier is connected with the engine; the second planet row comprises a second sun gear, a second planet carrier, a second gear ring and a plurality of second planet gears, the second planet gears are meshed with the second sun gear and the second gear ring, the second planet carrier is connected with the first sun gear, and the second sun gear is connected with the first gear ring and is connected with a first driving gear; the driven gear is meshed with the first driving gear; the first motor is connected with the second gear ring; and the second motor is connected with the driven gear. The hybrid power system provided by the embodiment of the invention has the advantages of reasonable power split ratio, easiness in processing, high space utilization rate, high transmission efficiency and the like.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a hybrid power system and a vehicle with the same.
Background
In the related art, a hybrid power system is generally provided with double planetary rows, and an engine and a motor are in transmission connection through the double planetary rows, so that the hybrid power system can be switched in a pure electric mode, a fuel oil mode and a hybrid stepless speed change driving mode, but the processing difficulty of the hybrid power system is high, the manufacturing cost is high, and the transmission efficiency and the space utilization rate are low due to the unreasonable connection relationship among the double planetary rows.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a hybrid system, which has the advantages of reasonable power splitting ratio, easy processing, high space utilization rate and transmission efficiency, etc.
The invention also provides a vehicle with the hybrid power system.
In order to achieve the above object, an embodiment according to a first aspect of the present invention proposes a hybrid system including: an engine having an engine output shaft; the first planet row comprises a first sun gear, a first planet carrier, a first gear ring and a plurality of first planet gears, the first gear ring is arranged around the first sun gear, each first planet gear is rotatably arranged on the first planet carrier and is respectively meshed with the first sun gear and the first gear ring, the first planet gears are arranged at intervals along the circumferential direction of the first sun gear, and the first planet carrier is in transmission connection with the engine output shaft; a second planet row, wherein the second planet row comprises a second sun gear, a second planet carrier, a second gear ring and a plurality of second planet gears, the second gear ring is arranged around the second sun gear, each second planet gear is rotatably arranged on the second planet carrier and is respectively meshed with the second sun gear and the second gear ring, the plurality of second planet gears are arranged at intervals along the circumferential direction of the second sun gear, the second sun gear and the first gear ring are in transmission connection and are connected with a first driving gear, and the second planet carrier is in transmission connection with the first sun gear; a driven gear engaged with the first drive gear; the first motor is provided with a first motor shaft, and the first motor shaft is in transmission connection with the second gear ring; and the second motor is provided with a second motor shaft, and the second motor shaft is in transmission connection with the driven gear.
The hybrid power system has the advantages of reasonable power distribution ratio, easiness in processing, high space utilization rate, high transmission efficiency and the like.
According to some embodiments of the invention, the first motor shaft and the second ring gear are connected by a first formation; the first gear ring and the second sun gear are connected through a second constructional element, and the second constructional element is positioned between the first planet row and the second planet row; the first sun gear and the second planet carrier are connected through a third structural member, the second planet carrier is positioned on one side, back to the first planet row, of the second planet row, and the second sun gear and the second structural member are empty-sleeved on the third structural member.
According to some embodiments of the invention, the hybrid system further comprises: the differential device is connected with a reduction driving gear in a transmission manner, the differential device is connected with a reduction driven gear, and the reduction driving gear is meshed with the reduction driven gear.
According to some embodiments of the invention, the hybrid system further comprises: a third planet row, wherein the third planet row comprises a third sun gear, a third planet carrier, a third ring gear and a plurality of third planet gears, the third ring gear is arranged around the third sun gear, each third planet gear is rotatably mounted on the third planet carrier and is respectively meshed with the third sun gear and the third ring gear, the plurality of third planet gears are arranged at intervals along the circumferential direction of the third sun gear, and the third sun gear is in transmission connection with the driven gear; and the third planet carrier is in transmission connection with the differential device.
According to some embodiments of the invention, the engine and the first motor are coaxially arranged and coaxially arranged with the second motor, and the second motor shaft is connected with a second driving gear and is in transmission connection with the driven gear through the second driving gear.
According to some embodiments of the invention, the engine, the first motor and the second motor are coaxially arranged, and the second motor shaft is in driving connection with the first driving gear and in driving connection with the driven gear through the first driving gear.
According to some embodiments of the invention, the second motor is located between the engine and the first planetary gear set, and the second motor shaft is hollow around the engine output shaft.
According to some embodiments of the invention, the hybrid system further comprises: a one-way locking mechanism engaged with the engine output shaft, the one-way locking mechanism allowing rotation of the engine output shaft in only one of a clockwise direction or a counterclockwise direction.
According to some embodiments of the invention, the hybrid system further comprises: and a locker connected to the first sun gear and the second planet carrier for controlling whether to apply a brake to the first sun gear and the second planet carrier.
According to a second aspect embodiment of the invention, a vehicle is provided, which includes the hybrid system according to the first aspect embodiment of the invention.
According to the vehicle of the embodiment of the second aspect of the invention, by utilizing the hybrid power system of the embodiment of the first aspect of the invention, the advantages of reasonable power splitting ratio, easiness in processing, high space utilization rate, high transmission efficiency and the like are achieved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic configuration diagram of a hybrid system according to an embodiment of the invention.
Fig. 2 is a lever diagram of dynamics of a hybrid system according to an embodiment of the present invention.
FIG. 3 is a lever diagram of the dynamics of a hybrid powertrain in an electric-only mode according to an embodiment of the present invention.
Fig. 4 is a lever diagram of dynamics of a hybrid system in a hybrid driving mode according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a hybrid system according to an embodiment of the present invention in which a one-way locking mechanism is connected to an engine output shaft.
Fig. 6 is a schematic structural diagram of a hybrid system according to another embodiment of the present invention in which a one-way locking mechanism is connected to an engine output shaft.
Fig. 7 is a schematic structural view of a hybrid system according to an embodiment of the present invention in which a one-way brake is connected to a first motor shaft.
Fig. 8 is a schematic structural view of a hybrid system according to another embodiment of the present invention in which a one-way brake is connected to a first motor shaft.
Fig. 9 is a schematic configuration diagram in which the driven gear and the differential device of the hybrid system according to the embodiment of the invention are connected through the third planetary row.
Fig. 10 is a schematic structural diagram of a hybrid system having a lock-up according to an embodiment of the invention.
Fig. 11 is a schematic structural view of the engine, the first motor and the second motor of the hybrid system according to the embodiment of the invention.
Reference numerals are as follows:
a hybrid power system 1,
A first planet row 200, a first sun gear 210, a first planet carrier 220, a first ring gear 230, a first planet gear 240, a first structure 250,
A second planet row 300, a second sun gear 310, a second planet carrier 320, a second ring gear 330, a second planet gear 340, a second structure 350, a third structure 360,
A first driving gear 400, a driven gear 500, a differential device 600, a reduction driving gear 610, a reduction driven gear 620,
A first motor 700, a first motor shaft 710,
A second motor 800, a second motor shaft 810, a second driving gear 820,
One-way locking mechanism 910, locker 920, one-way brake 930.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "a plurality" means two or more.
A hybrid system 1 according to an embodiment of the invention is described below with reference to the drawings.
As shown in fig. 1 to 11, the hybrid system 1 includes an engine 100, a first planetary row 200, a second planetary row 300, a driven gear 500, a first motor 700, and a second motor 800.
The engine 100 has an engine output shaft 110, the first planetary row 200 includes a first sun gear 210, a first planet carrier 220, a first ring gear 230, and a plurality of first planet gears 240, the first ring gear 230 is disposed around the first sun gear 210, each first planet gear 240 is rotatably mounted to the first planet carrier 220 and meshes with the first sun gear 210 and the first ring gear 230, respectively, the plurality of first planet gears 240 are disposed at intervals along a circumferential direction of the first sun gear 210, and the first planet carrier 240 is drivingly connected to the engine output shaft 110.
The second planet row 300 comprises a second sun gear 310, a second planet carrier 320, a second ring gear 330 and a plurality of second planet gears 340, wherein the second ring gear 330 is arranged around the second sun gear 310, each second planet gear 320 is rotatably arranged on the second planet carrier 320 and is respectively meshed with the second sun gear 310 and the second ring gear 330, the plurality of second planet gears 340 are arranged at intervals along the circumferential direction of the second sun gear 310, the second sun gear 310 is in transmission connection with the first ring gear 230 and is connected with a first driving gear 400, and the second planet carrier 320 is in transmission connection with the first sun gear 310.
The driven gear 500 is engaged with the first driving gear 400, the first motor 700 has a first motor shaft 710, the first motor shaft 710 is in transmission connection with the second gear 330, the second motor 800 has a second motor shaft 810, and the second motor shaft 810 is in transmission connection with the driven gear 500.
For example, the first motor 700 may be a motor with a power generation function, the second motor 800 may also be a motor with a power generation function, the first motor 700 and the second motor 800 may transmit electric energy to each other, and in addition, the central axis of the first planetary row 200 and the central axis of the second planetary row 300 may coincide.
It is assumed that a ratio of the number of teeth of the first ring gear 230 to the number of teeth of the first sun gear 210 is K1, a ratio of the number of teeth of the second ring gear 330 to the number of teeth of the second sun gear 310 is K2, a rotation speed of the first motor 700 is N1, a rotation speed of the first driving gear 400 is N2, a rotation speed of the engine 100 is N3, a torque T1 of the first motor 700, a torque of the first driving gear 400 is T2, and a torque of the engine 100 is T3.
Wherein,
k1 and K2 are more than 1, generally, the values of K1 and K2 are 1.6-4, and preferably, both K1 and K2 are 2-3. The dynamics of the hybrid system 1 are shown in fig. 2.
According to the hybrid system 1 of the present invention, the engine 100 is connected to the engine output shaft 110, the engine output shaft 110 is in transmission connection with the first planetary row 200, the first motor 700 is connected to the first motor shaft 710, the first motor shaft 710 is in transmission connection with the second planetary row 300, the first planetary row 200 is in transmission connection with the second planetary row 300, the second planetary row 300 is connected to the first driving gear 400, the first driving gear 400 is engaged with the driven gear 500, and the second motor shaft 810 is in transmission connection with the driven gear 500.
When the first motor 700 and the engine 100 are not operated, the second motor 800 can separately drive the driven gear 500 to rotate, so as to drive the vehicle to move, and at this time, the hybrid power system 1 is in a pure electric mode, and the dynamic characteristics of the hybrid power system 1 are shown in fig. 3.
When the first motor 700 and the engine 100 work and the second motor 800 does not work, the power output by the engine 100 is respectively transmitted to the driven gear 500 and the first motor 700 through the double planetary rows, the first motor 700 can be stressed to rotate for generating electricity, the electric energy generated by the first motor 700 can be stored in a battery of a vehicle, and the proportion of the power output by the engine 100 to the first motor 700 and the driven gear 500 can be adjusted through the double planetary rows, so that the hybrid power system 1 is in a fuel oil stepless speed change mode.
When the first motor 700, the second motor 800 and the engine 100 work, power output by the engine 100 is transmitted to the driven gear 500 and the first motor 700 through the double planetary rows respectively, the first motor 700 can be forced to rotate to generate power, electric energy generated by the first motor 700 can be used for supplying power to the second motor 800, power output by the second motor 800 is also transmitted to the driven gear 500, so that the engine 100 and the second motor 800 drive the vehicle to move together, and the ratio of the power output by the engine 100 to the first motor 700 and the driven gear 500 can be adjusted through the double planetary rows, so that the hybrid power system 1 is in a hybrid drive stepless speed change mode (ECVT), and the dynamic characteristics of the hybrid power system 1 are shown in fig. 4.
Moreover, by providing the first planetary gear set 200 and the second planetary gear set 300, the first planetary gear set 200 and the second planetary gear set 300 can share the torque output by the engine 100, and therefore, compared with a power system in which only one planetary gear set is provided in the related art, the hybrid system 1 according to the embodiment of the present invention can share a smaller load per planetary gear set, so that not only can the size of each planetary gear set be reduced to achieve the purpose of reducing the size and cost, but also the wear rate of the first planetary gear set 200 and the second planetary gear set 300 can be reduced to extend the service life of the first planetary gear set 200 and the second planetary gear set 300, thereby extending the service life of the hybrid system 1.
As can be seen from the above two relations, the ratio K1 of the number of teeth of the first ring gear 230 to the number of teeth of the first sun gear 210 may be 3, and the ratio K2 of the number of teeth of the second ring gear 330 to the number of teeth of the second sun gear 310 may be 2, where T1: t2: t3=1:3:4, this means that the torque output from the engine 100 is divided into 4 parts, wherein 3 parts of the torque output from the engine 100 is used to drive the vehicle to move, i.e., the torque distributed to the first driving gear 400 accounts for 75% of the total torque output from the engine 100, 1 part of the torque output from the engine 100 is used to be transmitted to the first motor 700 for driving the first motor 700 to generate electricity, i.e., the torque distributed to the first motor 700 accounts for 25% of the total torque output from the engine 100, and thus it can be seen that the power generated by the engine 100 to drive the vehicle to move is more sufficient, the vehicle has better power performance, the rest of the power output from the engine 100 is used to drive the first motor 700 to generate electricity, so that the engine 100 is maintained in an efficient torque output state, and the first motor 700 generates electricity to charge the battery of the vehicle or to provide energy for the rotation of the second motor 800, so that the power output from the engine 100 can be more reasonably distributed to the first motor 700 and the first driving gear 400, and the power split ratio of the hybrid system 1 is more reasonable, so that the vehicle power is sufficient and the energy utilization rate is high.
In addition, when K1 is 3 and K2 is 2, the size of two planet rows can not be too big, is favorable to hybrid system 1's miniaturized setting to improve the space utilization of vehicle, and the size of two planet rows can not the undersize, can reduce the processing degree of difficulty of two planet rows, improve production efficiency, save the processing cost. Therefore, the outer diameter of each planet row is moderate, so that the hybrid power system 1 is prevented from being large in size, the space utilization rate is improved, and the hybrid power system 1 can be conveniently processed and manufactured.
The torque output by the engine 100 is transmitted to the first driving gear 400 through the first planet carrier 220, the first planet gears 240 and the first gear ring 230, wherein the first planet gears 240 and the first gear ring 230 are connected in a meshing manner, and the first planet row 200 is small in size, so that the power loss between the engine 100 and the first driving gear 400 is low, the force transmission efficiency is high, and the power performance of the vehicle is optimized.
Thus, the hybrid power system 1 according to the present invention has the advantages of reasonable power split ratio, easy processing, high space utilization rate and transmission efficiency, etc.
According to some embodiments of the present invention, as shown in fig. 1, 5-11, the first motor shaft 710 and the second gear ring 330 are connected by the first structural member 250, the first gear ring 230 and the second sun gear 310 are connected by the second structural member 350, the second structural member 350 is located between the first planetary row 200 and the second planetary row 300, the first sun gear 210 and the second planetary row 220 are connected by the third structural member 360, the second gear ring 330 is located on a side of the second planetary row 300 facing away from the first planetary row 200, and the second sun gear 310 and the second structural member 350 are freely sleeved on the third structural member 360, that is, the second sun gear 310 and the second structural member 350 can rotate relative to the third structural member 360.
For example, the first motor shaft 710 and the second gear ring 330 may be integrally molded by the first structure 250, the first gear ring 230 and the second sun gear 310 may be integrally molded by the second structure 350, and the first sun gear 210 and the second planet carrier 320 may be integrally molded by the third structure 360. This can improve the coupling strength between the first motor shaft 710 and the second ring gear 330, between the first ring gear 230 and the second sun gear 310, and between the first sun gear 210 and the second planet carrier 320, and reduce the power transmission loss.
Therefore, interference among the first planetary gear set 200, the second planetary gear set 300 and the first motor shaft 710 can be avoided, which is beneficial to improving the reliability of the hybrid power system 1 and is convenient for connection.
According to some embodiments of the present invention, as shown in fig. 1, the hybrid system 1 further includes a differential device 600, the driven gear 500 is drivingly connected with a reduction driving gear 610, the differential device 600 is connected with a reduction driven gear 620, and the reduction driving gear 610 is meshed with the reduction driven gear 620. The differential device 600 is connected to the driving wheels, so that the driving wheels on both sides of the vehicle form a rotation speed difference during turning, thereby facilitating the turning of the vehicle.
By providing the reduction driven gear 620 and the reduction driving gear 610, the rotation speed of the differential device 600 can be made smaller than the rotation speed of the driven gear 500, and the torque of the differential device 600 can be made larger than the torque of the driven gear 500, and in addition, the reduction driven gear 620 and the reduction driving gear 610 are easy to process and convenient to arrange.
According to other embodiments of the present invention, as shown in fig. 9, the hybrid system 1 further includes a third planetary row 630 and a differential device 600. The differential device 600 is connected to the driving wheels, so that the driving wheels on both sides of the vehicle form a rotation speed difference during turning, thereby facilitating the turning of the vehicle.
The third planet row 630 includes a third sun gear 631, a third planet carrier 632, a third ring gear 634, and a plurality of third planet gears 633, the third ring gear 634 is disposed around the third sun gear 631, each third planet gear 631 is rotatably mounted to the third planet carrier 632 and is engaged with the third sun gear 631 and the third ring gear 634, respectively, the plurality of third planet gears 633 are spaced apart along a circumference of the third sun gear 631, the third sun gear 631 is drivingly connected to the driven gear 500, and the third planet carrier 632 is drivingly connected to the differential 600.
Thereby, it is possible to ensure that the power transmission between the driven gear 500 and the differential device 600 is more smooth, and the third planetary row 630 has the effects of decelerating and raising the torque.
According to some embodiments of the present invention, as shown in fig. 1, the engine 100 and the first motor 700 are coaxially arranged and are coaxially arranged with the second motor 800, and the second motor shaft 810 is connected with the second driving gear 820 and is in transmission connection with the driven gear 500 through the second driving gear 820.
Specifically, the first planetary row 200 and the second planetary row 300 are disposed between the engine 100 and the first motor 700, and the second motor 800 and the first motor 700 are located on the same side of the first planetary row 200 and the second planetary row 300.
In this way, the central axis of first electric machine 700 and the central axis of second electric machine 800 may be made parallel to each other but not coincident with each other, thereby reducing the axial dimension of hybrid system 1 as a whole to facilitate the arrangement of hybrid system 1.
In addition, because the second motor 800 and the first motor 700 generate less heat during operation, and the second motor 800 and the first motor 700 have lower requirements for heat dissipation when in an operating state, the second motor 800 and the first motor 700 are arranged at one axial end of the hybrid power system 1, and the engine 100 is arranged at the other axial end of the hybrid power system 1, so that interference of the engine 100 with the first motor 700 and the second motor 800 during heat dissipation can be avoided, the heat dissipation performance of the engine 100 can be optimized, and the working efficiency of the engine 100 can be ensured.
According to other embodiments of the present invention, as shown in fig. 11, the engine 100, the first motor 700 and the second motor 800 are coaxially arranged, and the second motor shaft 810 is in transmission connection with the first driving gear 400 and in transmission connection with the driven gear 500 through the first driving gear 400.
Specifically, the central axis of the engine 100, the central axis of the first electric machine 700, the central axis of the second electric machine 800, the central axis of the first planetary row 200, and the central axis of the second planetary row 300 may coincide. Thus, on the one hand, the radial size of the whole hybrid system 1 in the first motor 700 can be reduced, and on the other hand, the second motor 800 does not need to be additionally provided with a gear connected with the driven gear 500, so that the number of parts of the hybrid system 1 is reduced, and the weight and the cost are reduced.
Further, the second motor 800 is located between the engine 100 and the first planetary gear set 200, the second motor shaft 810 is hollow in the engine output shaft 110, that is, the second motor shaft 810 can rotate relative to the engine output shaft 110, the engine output shaft 110 can be used for positioning and fixing the second motor shaft 810, and no rotational interference occurs when the engine output shaft 110 and the second motor shaft 810 rotate.
Wherein the first planet carrier 220 is located between the second motor 800 and the first sun gear 210, the second motor shaft 810 may surround the first planet carrier 220. Therefore, the second motor 800 and the first driving gear 400 are connected with each other at a higher strength and at a closer position, so that the length of the second motor shaft 810 can be shortened, and the second motor 800 can drive the first driving gear 400 to rotate.
According to some embodiments of the invention, as shown in fig. 5 and 6, the hybrid system 1 further includes a one-way locking mechanism 910.
The one-way locking mechanism 910 is engaged with the engine output shaft 110, and the one-way locking mechanism 910 allows only the engine output shaft 110 to rotate in one of the clockwise direction or the counterclockwise direction.
The one-way locking mechanism 910 may be a one-way clutch or a brake, and the normal rotation direction of the engine 100 is clockwise, in other words, the engine 100 may drive the first motor 700 to generate power and drive the vehicle to move when rotating in the clockwise direction.
For example, when the one-way locking mechanism 910 is a one-way clutch, the one-way clutch may be sleeved on the engine output shaft 110, when the engine output shaft 110 rotates clockwise, an inner circumferential surface of the one-way clutch may rotate along with the engine output shaft 110, and when the engine output shaft 110 rotates counterclockwise, the inner circumferential surface of the one-way clutch is fixed, so as to prevent the engine output shaft 110 from rotating.
When the one-way locking mechanism 910 is a brake, the brake is opened to allow the engine output shaft 110 to rotate when the engine output shaft 110 rotates in the clockwise direction, and the brake is closed to prevent the engine output shaft 110 from rotating when the engine output shaft 110 rotates in the counterclockwise direction.
It should be noted that when the first motor 700 outputs power, the engine 100 does not rotate counterclockwise because the one-way locking mechanism 910 can brake the engine output shaft 110. In this way, when the engine 100 is not operated, the first motor 700 can drive the vehicle to move alone, or the first motor 700 and the second motor 800 can drive the vehicle to move together.
The power transmission modes of the above two operation modes are described below by way of example:
1. when the first motor 700 alone drives the vehicle to move and the first motor 700 can rotate in the counterclockwise direction, the engine output shaft 110 and the first carrier 220 are restricted by the one-way locking mechanism 910 and cannot rotate in the counterclockwise direction, and the power of the first motor 700 is transmitted to the differential device 600 through the double planetary gear set to drive the vehicle to move forward.
2. When the first motor 700 can rotate in the counterclockwise direction, the engine output shaft 110 and the first planet carrier 220 are limited by the one-way locking mechanism 910 and cannot rotate in the counterclockwise direction, the power of the first motor 700 is transmitted to the differential device 600 through the first planet row 200 and the second planet row 300, the power of the second motor 800 can also be transmitted to the driven gear 500, and the first motor 700 and the second motor 800 drive the vehicle to move together.
In some embodiments of the present invention, as shown in fig. 7 and 8, the first motor shaft 710 may also be provided with a one-way brake 930, the one-way brake 930 being engaged with the first motor shaft 710, the one-way brake 930 allowing only the first motor shaft 710 to rotate in one of a clockwise direction or a counterclockwise direction. For example, the first motor 700 may generate electricity when the first motor shaft 710 rotates in a clockwise direction.
Specifically, the one-way brake 930 may be a one-way clutch or a brake, and when the one-way brake 930 is a one-way clutch, the one-way clutch is sleeved on the first motor shaft 710, and when the first motor shaft 710 rotates in the clockwise direction, an inner circumferential surface of the one-way clutch may rotate along with the first motor shaft 710; the inner circumferential surface of the one-way clutch is fixed to prevent the first motor shaft 710 from rotating when the first motor shaft 710 rotates in the counterclockwise direction.
When the one-way brake 930 is a brake, the brake is turned off to allow the first motor shaft 710 to rotate when the first motor shaft 710 rotates in the clockwise direction; when the first motor shaft 710 rotates in a counterclockwise direction, the brake is closed to prevent the first motor shaft 710 from rotating.
According to some embodiments of the invention, as shown in fig. 10, the hybrid system 1 further includes a locker 920.
A locker 920 is connected to the first sun gear 210 and the second carrier 320 to control whether braking is applied to the first sun gear 210 and the second carrier 320. Among other things, the locker 920 may be located between the first planetary row 200 and the second planetary row 300.
For example, first sun gear 210 and second planet carrier 320 may be integrally formed, and when lock 920 is closed, first sun gear 210 and second planet carrier 320 are prevented from rotating, and when lock 920 is open, first sun gear 210 and second planet carrier 320 are allowed to rotate.
When the first motor 700 is operated and the second motor 800 and the engine 100 are not operated, the locker 920 is closed to apply brake to the first sun gear 210 and the second planet carrier 320, the power of the first motor 700 is transmitted to the first driving gear 400 and the driven gear 500 through the second planet carrier 300, and the ratio of the rotation speed of the first motor 700 to the rotation speed of the driven gear 500 is a fixed value, which is a new pure electric mode.
When the engine 100 is operated and the first and second electric motors 700 and 800 are not operated, the locker 920 is closed to apply the brake to the first sun gear 210 and the second carrier 320, and the power of the engine 100 is transmitted to the first driving gear 400 and the driven gear 500 through the first planetary gear train 200, at this time, the rotation direction of the first driving gear 400 is the same as the rotation direction of the engine 100, and the ratio between the rotation speed of the engine 100 and the rotation speed of the driven gear 500 is a fixed value, which is a new fuel mode.
Therefore, by arranging the locking device 920, the hybrid power system 1 is newly provided with a pure electric mode and a fuel mode, the diversity of the hybrid power system 1 is improved, and the adaptability is higher.
A vehicle according to an embodiment of the invention, which includes the hybrid system 1 according to the above-described embodiment of the invention, is described below with reference to the drawings.
According to the vehicle provided by the embodiment of the invention, the hybrid power system 1 provided by the embodiment of the invention has the advantages of reasonable power splitting ratio, easiness in processing, high space utilization rate, high transmission efficiency and the like.
Other configurations and operations of the hybrid system 1 and the vehicle according to the embodiment of the invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A hybrid powertrain system, comprising:
an engine having an engine output shaft;
the first planet row comprises a first sun gear, a first planet carrier, a first gear ring and a plurality of first planet gears, the first gear ring is arranged around the first sun gear, each first planet gear is rotatably arranged on the first planet carrier and is respectively meshed with the first sun gear and the first gear ring, the first planet gears are arranged at intervals along the circumferential direction of the first sun gear, and the first planet carrier is in transmission connection with the engine output shaft;
a second planet row, wherein the second planet row comprises a second sun gear, a second planet carrier, a second gear ring and a plurality of second planet gears, the second gear ring is arranged around the second sun gear, each second planet gear is rotatably arranged on the second planet carrier and is respectively meshed with the second sun gear and the second gear ring, the plurality of second planet gears are arranged at intervals along the circumferential direction of the second sun gear, the second sun gear and the first gear ring are in transmission connection and are connected with a first driving gear, and the second planet carrier is in transmission connection with the first sun gear;
a driven gear engaged with the first drive gear;
the first motor is provided with a first motor shaft, and the first motor shaft is in transmission connection with the second gear ring;
and the second motor is provided with a second motor shaft, and the second motor shaft is in transmission connection with the driven gear.
2. The hybrid system of claim 1, wherein the first motor shaft and the second ring gear are connected by a first structural member;
the first gear ring and the second sun gear are connected through a second constructional element, and the second constructional element is positioned between the first planet row and the second planet row;
the first sun gear and the second planet carrier are connected through a third structural member, the second planet carrier is positioned on one side, back to the first planet row, of the second planet row, and the second sun gear and the second structural member are empty-sleeved on the third structural member.
3. The hybrid system of claim 1, further comprising:
the differential device is connected with a reduction driving gear in a transmission manner, the differential device is connected with a reduction driven gear, and the reduction driving gear is meshed with the reduction driven gear.
4. The hybrid system of claim 1, further comprising:
a third planet row, which includes a third sun gear, a third planet carrier, a third ring gear, and a plurality of third planet gears, wherein the third ring gear is disposed around the third sun gear, each third planet gear is rotatably mounted on the third planet carrier and is engaged with the third sun gear and the third ring gear, the plurality of third planet gears are disposed at intervals along the circumferential direction of the third sun gear, and the third sun gear is in transmission connection with the driven gear;
and the third planet carrier is in transmission connection with the differential device.
5. The hybrid system of claim 1, wherein the engine and the first motor are coaxially arranged and coaxially arranged with the second motor, and the second motor shaft is connected to a second driving gear and drivingly connected to the driven gear through the second driving gear.
6. The hybrid powertrain system of claim 1, wherein the engine, the first electric machine, and the second electric machine are coaxially arranged, and the second electric machine shaft is drivingly connected to the first drive gear and to the driven gear via the first drive gear.
7. The hybrid powertrain system of claim 6, wherein the second electric machine is positioned between the engine and the first planetary gear set, and the second electric machine is hollow on the engine output shaft.
8. The hybrid system of claim 1, further comprising:
a one-way locking mechanism engaged with the engine output shaft, the one-way locking mechanism allowing the engine output shaft to rotate only in one of a clockwise direction or a counterclockwise direction.
9. The hybrid system of claim 1, further comprising:
and a locker connected to the first sun gear and the second planet carrier for controlling whether to apply a brake to the first sun gear and the second planet carrier.
10. A vehicle characterized by comprising the hybrid system according to any one of claims 1 to 9.
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| CN202110938904.9A CN115703344A (en) | 2021-08-16 | 2021-08-16 | Hybrid power system and vehicle with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110938904.9A CN115703344A (en) | 2021-08-16 | 2021-08-16 | Hybrid power system and vehicle with same |
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| CN115703344A true CN115703344A (en) | 2023-02-17 |
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| CN202110938904.9A Pending CN115703344A (en) | 2021-08-16 | 2021-08-16 | Hybrid power system and vehicle with same |
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