CN111976450A - Hybrid electric driving device - Google Patents

Hybrid electric driving device Download PDF

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Publication number
CN111976450A
CN111976450A CN202010987796.XA CN202010987796A CN111976450A CN 111976450 A CN111976450 A CN 111976450A CN 202010987796 A CN202010987796 A CN 202010987796A CN 111976450 A CN111976450 A CN 111976450A
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China
Prior art keywords
gear
power
engine
hybrid electric
motor
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CN202010987796.XA
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Chinese (zh)
Inventor
曾庆文
华煜
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Shenzhen Xingkang Powertrain Co ltd
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Shenzhen Xingkang Powertrain Co ltd
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Priority to CN202010987796.XA priority Critical patent/CN111976450A/en
Publication of CN111976450A publication Critical patent/CN111976450A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention provides a hybrid electric drive device, comprising: the engine, a first motor, a second motor, a first planet row, a second planet row, a shunt speed change mechanism and an output shaft, wherein 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 fixedly connected with the second planet carrier and is connected with the engine, the first sun gear is fixedly connected with the second sun gear and is connected with the first motor, and the shunt speed change mechanism can selectively connect the first gear ring and/or the second gear ring with the output shaft, so that the power output by the first gear ring and/or the second gear ring and the power of the second motor are converged and then output to drive wheels. According to the hybrid electric drive device, through the two planet rows and the shunting speed change mechanism, more working modes can be realized, and the performance of the hybrid electric drive device is improved.

Description

Hybrid electric driving device
[ technical field ]
The invention relates to the technical field of vehicle driving and transmission, in particular to a hybrid electric driving device.
[ background art ]
In the existing power-split hybrid electric drive device based on the planet row, the power of an engine is split into two paths by using a single split planet row, one path of power flow drives a first motor to generate electricity to charge an electric storage device or supply electricity to a second motor, and the other path of power flow converges with the power of the second motor to drive a vehicle.
However, the power-split hybrid electric drive device with the existing structure has the following defects: 1) only one power split ratio is adopted, so that the performance in a wide vehicle speed range in a hybrid driving mode is difficult to ensure to be better; 2) the engine cannot directly drive the vehicle, and particularly at the highest vehicle speed, the comprehensive energy efficiency is low due to multiple energy conversion; 3) the highest speed in the pure electric driving mode is limited by the highest rotating speed of the first motor, so that the highest speed requirement in the pure electric driving mode cannot be met; 4) and in the pure electric running mode, only the second motor is used for driving the vehicle after speed reduction, and the efficiency is lower when the highest vehicle speed in the mode is increased. It would therefore also be desirable to provide a power-split hybrid electric drive with improved overall performance that addresses at least one of the above-mentioned problems.
[ summary of the invention ]
To overcome the problems of the prior art, the present invention provides a hybrid electric drive device.
The invention provides a hybrid electric drive device, which comprises an engine, a first motor, a second motor, a first planet row, a second planet row, a shunting speed change mechanism and an output shaft, the first planet row comprises a first sun gear, a first planet carrier and a first ring gear, the second planet row comprises a second sun gear, a second planet carrier and a second ring gear, the first planet carrier is fixedly connected with the second planet carrier and is connected with the engine, the first sun gear is fixedly connected with the second sun gear and is connected with the first motor, the split speed change mechanism selectively connects the first ring gear and/or the second ring gear with the output shaft, so that the power output via the first ring gear and/or the second ring gear is output to drive wheels after being converged with the power of the second motor.
Preferably, the split speed change mechanism comprises a first gear, a second gear, a third gear, a fourth gear, a first separating and jointing element and a second separating and jointing element, wherein the first gear is fixedly connected with the first gear ring, the second gear is fixedly connected with the second gear ring, the third gear and the fourth gear are freely sleeved on the output shaft, the third gear is in mesh transmission with the first gear, the fourth gear is in mesh transmission with the second gear, and the first separating and jointing element and the second separating and jointing element are arranged on the output shaft and can selectively fixedly connect the third gear and/or the fourth gear with the output shaft.
Preferably, the first separation engagement element is engaged, the second separation engagement element is disengaged, and the power of the engine is split by the first planetary gear train and then output from the first ring gear to the output shaft, and is converged with the power of the second motor to drive the vehicle, thereby implementing a first power split mode;
the first separating and engaging element is separated, the second separating and engaging element is engaged, the power of the engine is output to the output shaft from the second gear ring after being divided by the second planet row, and the power of the engine and the power of the second motor are converged to drive the vehicle, so that a second power dividing mode is realized.
Preferably, when the first gear and the third gear and the second gear and the fourth gear are equal in speed ratio and the first and second disengagement elements are engaged simultaneously, the engine directly drives the vehicle, achieving an engine direct drive mode.
Preferably, the hybrid electric drive device further includes a one-way clutch for restricting reverse rotation of the engine, the one-way clutch being disposed between an output end of the engine or the first carrier and a housing.
Preferably, the rotational direction restricting means is a one-way clutch.
Preferably, the method further comprises the following steps: in the pure electric driving mode, the first motor and/or the second motor drives the vehicle.
Preferably, in the electric-only driving mode, the first separation and engagement element is disengaged, the second separation and engagement element is engaged, and the power of the first motor is output to the output shaft through the second planetary gear train, so that a low gear is realized; the first separation joint element is jointed, the second separation joint element is separated, and the power of the first motor is output to the output shaft through the first planetary gear train, so that a high gear is realized.
Preferably, the first disconnecting engagement element is a one-way clutch or a selective one-way clutch; or the second disconnect coupling element is a one-way clutch or a selectable one-way clutch.
Preferably, the switching between the first power split mode and the second power split mode is achieved by adjusting a rotation speed of the first electric machine relative to the engine, and locking one of the first disengaging engagement element or the second disengaging engagement element.
Compared with the prior art, the hybrid electric drive device can realize more working modes through the arranged shunting speed change mechanism, thereby improving the performance of the hybrid electric drive device.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a hybrid electric drive according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a hybrid electric drive device according to another embodiment of the present invention.
Description of the main element symbols:
1, an engine; 2 a first motor; 3 a second motor; 4, 41, 42, 43 are respectively a first planet row, a first sun gear, a first planet carrier and a first ring gear; 5, 51, 52, 53 are the second planet row, the second sun gear, the second planet carrier and the second ring gear, respectively; 6, 61, 62, 63, 64, 65, 66 are a split speed change mechanism, a first gear, a second gear, a third gear, a fourth gear, a first disengaging engagement element and a second disengaging engagement element, respectively; 7 an output shaft; 8 a rotation direction limiting means.
[ detailed description of the invention ]
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be 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.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Fig. 1 is a schematic structural view of a hybrid electric drive device according to an embodiment of the present invention. Referring to fig. 1, the hybrid electric drive device includes: the engine 1, the first motor 2, the second motor 3, the first planetary gear set 4, the second planetary gear set 5 and the split speed-changing mechanism 6, the first planetary gear set 4 comprises a first sun gear 41, a first planet carrier 42 and a first gear ring 43, the second planetary gear set 5 comprises a second sun gear 51, a second planet carrier 52 and a second gear ring 53, the first planet carrier 42 is fixedly connected with the second planet carrier 52 and connected with the engine 1, the first sun gear 41 is fixedly connected with the second sun gear 51 and connected with the first motor 2, the first planet carrier 42 is fixedly connected with the second sun gear 51, the first gear ring 43 is fixedly connected with the second gear ring 53, and the split speed-changing mechanism 6 selectively connects the first gear ring 43 and/or the second gear ring 53 with the output shaft 7, so that the power output by the first gear ring 43 and/or the second gear ring 53 is converged with the power of the second motor 3 and then is output to drive wheels.
As shown in fig. 1, the split speed change mechanism 6 includes a first gear 61, a second gear 62, a third gear 63, a fourth gear 64, a first split engagement element 65 and a second split engagement element 66, the first gear 61 is fixedly connected with the first gear ring 43, the second gear 62 is fixedly connected with the second gear ring 53, the third gear 63 and the fourth gear 64 are freely sleeved on the output shaft 7, the third gear 63 is in mesh transmission with the first gear 61, the fourth gear 64 is in mesh transmission with the second gear 62, and the first split engagement element 65 and the second split engagement element 66 are arranged on the output shaft 7 and can selectively fixedly connect the third gear 63 and/or the fourth gear 64 with the output shaft 7.
In the hybrid driving mode, the first disconnecting/coupling element 65 is coupled, the second disconnecting/coupling element 66 is decoupled, the power of the engine 1 is split by the first planetary gear set 4 and then output from the first ring gear 43 to the output shaft 7, and the power of the second motor 3 is converged to drive the vehicle, thereby realizing the first power split mode;
the first disconnecting/coupling element 65 is disconnected, the second disconnecting/coupling element 66 is coupled, the power of the engine 1 is split by the second planetary gear set 5 and then output from the second ring gear 53 to the output shaft 7, and the power of the second motor 3 is converged to drive the vehicle, thereby implementing the second power split mode.
The engine 1 is connected with the first planet carrier 42 and the second planet carrier 52, the first motor 2 is connected with the first sun gear 41 and the second sun gear 51, therefore, the power of the engine 1 can be split through the first split planet row 4 or the second planet row 5, namely, one path of power drives the first motor 2 to generate power, can charge the power storage device or supply power to the second motor 3, the other path of power is directly output through the first ring gear 43 or the second ring gear 53, when one of the first split joint element 65 or the second split joint element 66 is jointed, the corresponding power is transmitted to the output shaft 7, the power of the second motor 3 is also transmitted to the output shaft 7, and the merged power drives the vehicle together.
From the kinematic equations and the torque relationships of the first planetary row 4 and the second planetary row 5, equations (1), (2), (3), and (4) can be obtained:
nt1+k1nq1＝(1+k1)nj1 (1)
Tt1∶Tq1∶Tj1＝1∶k1∶-(1+k1) (2)
nt2+k2nq2＝(1+k2)nj2 (3)
Tt2∶Tq2∶Tj2＝1∶k2∶-(1+k2) (4)
n is determined as shown in FIG. 1t1＝nt2、nj1＝nj2Let k be1＜k2
If n ist1＝nj1Deducing nq1＝nq2 (5)
If n ist1＜nj1Deducing nq1＞nq2 (6)
If n ist1＞nj1Deducing nq1＜nq2 (7)
In the formula: n ist1、nq1、nj1、nt2、nq2、nj2The first sun gear 41 rotation speed, the first ring gear 43 rotation speed, the first carrier 42 rotation speed, the second sun gear 51 rotation speed, the second ring gear 53 rotation speed, and the second carrier 52 rotation speed, respectively; t ist1、Tq1、Tj1、Tt2、Tq2、Tj2The first sun gear 41 torque, the first ring gear 43 torque, the first carrier 42 torque, the second sun gear 51 torque, the second ring gear 53 torque, and the second carrier 52 torque, respectively; k is a radical of1、k2Respectively, a structural characteristic of the first planetary row 4 and a structural characteristic of the second planetary row 5.
It can be seen that the first planetary gear set 4 and the second planetary gear set 5 select different structural characteristic parameters, so that the ratio of the power for driving the first electric machine 2 to generate electricity to the power for directly driving the vehicle can be adjusted, thereby meeting the requirements of different power distribution ratios at low and high speeds of the vehicle.
The optional range of the characteristic parameters of the planetary gear set for a vehicle is 1.5-4.5, for example, the characteristic parameter k of the first planetary gear set 41Optionally 1.75, structural characteristic parameter k of the second planetary row 52And optionally 3.5, the first sun gear is driven according to the torque ratio of the planetary line when the first ring gear 43 outputs power to the output shaft 7The ratio of the torque output at 41 to the torque output at the first ring gear 43 is 1: 1.75; when the second ring gear 53 outputs power to the output shaft 7, the ratio of the torque output from the second sun gear 51 to the torque output from the second ring gear 53 is 1: 3.5, so that different torque distribution ratios can be realized.
When the speed ratio of the first gear 61 to the third gear 63 is equal to the speed ratio of the second gear 62 to the fourth gear 64, the first separation and engagement element 65 and the second separation and engagement element 66 are engaged simultaneously, the first planetary row 4 and the second planetary row 5 rotate integrally, the engine 1 is not branched, the vehicle is directly driven, and the direct engine driving mode is realized. When the vehicle is cruising on a highway at a constant speed, the driving power of the vehicle is provided by the engine 1, and the comprehensive energy efficiency can be improved because power splitting and multiple energy conversion are not carried out.
When the first and second disconnecting engagement elements 65, 66 are simultaneously disconnected, the second electric machine 3 drives the vehicle. In the electric-only driving mode, the engine 1 is off, the first disconnecting engagement element 65 and the second disconnecting engagement element 66 are simultaneously disconnected, and only the second electric machine 3 drives the vehicle to run. The maximum vehicle speed in this mode can be increased since it is no longer limited by the maximum rotational speed of the first electric machine 2.
The second motor 3 can not only improve the highest speed of the pure electric running mode without limitation, but also the first motor 2 can participate in driving the vehicle, so that the maximum climbing gradient and acceleration performance in the mode are improved.
As shown in fig. 1, the hybrid electric drive device further includes a rotation direction restricting device 8 for restricting reverse rotation of the engine 1, the rotation direction restricting device 8 being provided between the output end of the engine 1 or the first carrier 42 and the housing. The rotation direction restriction means 8, which may be implemented by a one-way clutch, is configured to allow only the engine 1 to rotate in the forward direction, so that in the electric-only driving mode, the engine 1 is turned off, the first electric motor 2 rotates in the reverse direction, and the power thereof is transmitted to the output shaft 7 through the first planetary gear set 4 or the second planetary gear set 5, thereby driving the vehicle together with the second electric motor 3. Since the rotational speeds of the first and second carriers 42 and 52 are limited to zero, the first planet carrierThe row 4 and the second planetary row 5 in fact act as reducers, with achievable speed ratios of-k respectively1And-k2That is, two gears of high and low (assuming k) can be realized1<k2). Because the first motor 2 rotates reversely, the power of the first motor 2 and the power of the second motor 3 are superposed in the same direction, the driving force is increased, and the first motor 2 is also provided with two gears, so that the vehicle power performance is improved.
The first and second disengaging and engaging elements 65, 66 may be clutches, gear shifting sleeves, one-way clutches or selective one-way clutches, i.e. both shafts may be locked for rotation or slip-disengaged under the overspeed condition, and other types of disengaging and engaging elements are also possible, but not limited thereto.
Fig. 2 is a schematic structural view of a hybrid electric drive device according to another embodiment of the present invention. Referring to fig. 2, the first and second disconnecting engagement elements 65, 66 are one-way clutches or selective one-way clutches. According to the equations (5), (6) and (7), the first separation and engagement element 65 or the second separation and engagement element 66 can be in a locked or slipping state by adjusting the rotation speed of the first motor 2, so that the power output of one of the first ring gear 43 or the second ring gear 53 is realized, that is, the switching between the first power split mode and the second power split mode can be realized by adjusting the rotation speed of the first motor 2 relative to the engine 1, and the requirements of different working conditions are met.
The hybrid electric drive device according to the embodiment of the present invention can be used for a front-engine front-drive vehicle, a rear-engine front-drive vehicle, or a rear-engine rear-drive vehicle, and is not limited thereto.
According to the hybrid electric drive device provided by the embodiment of the invention, more working modes can be realized through the arranged shunting speed change mechanism, so that the performance of the hybrid electric drive device is improved.
The present invention is not limited to the above-described embodiments, but covers all changes and modifications that may be made without departing from the spirit and scope of the invention. Such variations and modifications are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Claims (10)

1. A hybrid electric drive device, comprising:
the split-flow speed change mechanism can selectively connect the first gear ring and/or the second gear ring with the output shaft, so that power output by the first gear ring and/or the second gear ring and power of the second motor are converged and then output to drive wheels.
2. Hybrid electric drive device according to claim 1,
the split speed change mechanism comprises a first gear, a second gear, a third gear, a fourth gear, a first split joint element and a second split joint element, wherein the first gear is fixedly connected with the first gear ring, the second gear is fixedly connected with the second gear ring, the third gear and the fourth gear are freely sleeved on the output shaft, the third gear is in meshing transmission with the first gear, the fourth gear is in meshing transmission with the second gear, and the first split joint element and the second split joint element are arranged on the output shaft and selectively fixedly connect the third gear and/or the fourth gear with the output shaft.
3. Hybrid electric drive device according to claim 2,
the first separation joint element is connected, the second separation joint element is separated, the power of the engine is divided by the first planet row and then is output to the output shaft from the first gear ring, and the power of the engine and the power of the second motor are converged to drive the vehicle, so that a first power dividing mode is realized;
the first separating and engaging element is separated, the second separating and engaging element is engaged, the power of the engine is output to the output shaft from the second gear ring after being divided by the second planet row, and the power of the engine and the power of the second motor are converged to drive the vehicle, so that a second power dividing mode is realized.
4. Hybrid electric drive device according to claim 3,
when the speed ratio of the first gear to the third gear is equal to the speed ratio of the second gear to the fourth gear and the first separating and jointing element and the second separating and jointing element are jointed simultaneously, the engine directly drives the vehicle and an engine direct driving mode is realized.
5. Hybrid electric drive device according to claim 2,
and a rotation direction limiting device for limiting reverse rotation of the engine, the rotation direction limiting device being disposed between an output end of the engine or the first carrier and a housing.
6. The hybrid electric drive of claim 5, further comprising:
the rotational direction limiting device is a one-way clutch.
7. The hybrid electric drive of claim 5, further comprising:
in the pure electric driving mode, the first motor and/or the second motor drives the vehicle.
8. Hybrid electric drive device according to claim 6,
in the pure electric driving mode, the first separation and engagement element is separated, the second separation and engagement element is engaged, and the power of the first motor is output to the output shaft through the second planetary gear train, so that a low gear is realized; the first separation joint element is jointed, the second separation joint element is separated, and the power of the first motor is output to the output shaft through the first planetary gear train, so that a high gear is realized.
9. Hybrid electric drive device according to claim 3,
the first disconnecting engagement element is a one-way clutch or a selective one-way clutch; or
The second separation and engagement element is a one-way clutch or a selective one-way clutch.
10. Hybrid electric drive device according to claim 8,
by adjusting the rotational speed of the first electric machine relative to the engine, one of the first or second disengaging engagement elements locks up, enabling switching between the first and second power split modes.
CN202010987796.XA 2020-09-18 2020-09-18 Hybrid electric driving device Withdrawn CN111976450A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112829575A (en) * 2021-02-04 2021-05-25 东风汽车集团股份有限公司 Hybrid electric drive system with double motors and double star gear mechanisms
CN113246713A (en) * 2021-05-17 2021-08-13 何大为 Hybrid power driving system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112829575A (en) * 2021-02-04 2021-05-25 东风汽车集团股份有限公司 Hybrid electric drive system with double motors and double star gear mechanisms
CN113246713A (en) * 2021-05-17 2021-08-13 何大为 Hybrid power driving system

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