CN113246714A - Power transmission system for vehicle and vehicle - Google Patents
Power transmission system for vehicle and vehicle Download PDFInfo
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- CN113246714A CN113246714A CN202110318794.6A CN202110318794A CN113246714A CN 113246714 A CN113246714 A CN 113246714A CN 202110318794 A CN202110318794 A CN 202110318794A CN 113246714 A CN113246714 A CN 113246714A
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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
- 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
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hybrid Electric Vehicles (AREA)
- Structure Of Transmissions (AREA)
Abstract
The application discloses a power transmission system and vehicle for vehicle, power transmission system includes: an engine; a first motor generator provided to be capable of interlocking with the engine; a planet carrier provided with a planetary gear, the planet carrier being arranged to be capable of linking with the first motor generator; a ring gear disposed outside the planet carrier and engaged with the planet gears, the ring gear being selectively engageable with the planet carrier and the ring gear being further configured to be selectively locked; the sun gear is arranged on the inner side of the planet carrier and is meshed with the planet gear; the second motor generator and the power output shaft, and the second motor generator and the sun gear are both arranged to be capable of being linked with the power output shaft. The power transmission system is simple in overall structure, easy to operate and capable of meeting various different working conditions.
Description
Technical Field
The present application relates to the field of vehicle technology, and in particular, to a powertrain for a vehicle and a vehicle.
Background
Due to the shortage of petroleum resources and the enhancement of public environmental awareness, pure electric vehicles and fuel cell vehicles are greatly promoted in China for optimizing energy structures, and a large number of new energy vehicle manufacturing enterprises are developed domestically; however, due to technical constraints, it is difficult to fully popularize the above-mentioned types of automobiles in a short time; therefore, a hybrid vehicle that is relatively mature in technology is currently a desirable choice.
The mature oil-electricity hybrid vehicle models sold in the current market all have certain defects, or the vehicle has poor structure acceleration and poor high-speed performance; or the structural engine of the vehicle has insufficient utilization of surplus power, so that the potential of energy conservation in the future is small; and the transmission pair of part of vehicles is too many, so that the efficiency is low.
Disclosure of Invention
The power transmission system is simple in integral structure, simple to operate, capable of meeting multiple different working conditions, high in mechanical transmission efficiency, high in power generation efficiency, high in electric transmission efficiency, high in braking power generation efficiency, good in acceleration performance, good in power output smoothness, simple in control logic and good in oil saving performance.
The application also provides a vehicle with the power transmission system.
The power transmission system for a vehicle according to the present application includes: an engine; a first motor generator provided to be capable of interlocking with the engine; a planet carrier provided with a planetary gear, the planet carrier being provided so as to be capable of interlocking with the first motor generator; a ring gear disposed outside the carrier and engaged with the pinion gears, the ring gear being selectively engageable with the carrier and the ring gear being further configured to be selectively locked; a sun gear disposed inside the carrier and engaged with the planetary gear; the second motor generator and the sun gear are both arranged to be capable of being linked with the power output shaft.
According to the power transmission system for the vehicle, the planet carrier and the gear ring are selectively combined and the gear ring can be selectively locked, so that the power transmission system of the vehicle has the characteristics of high mechanical transmission efficiency, high power generation efficiency, high electric transmission efficiency, high braking power generation efficiency, good acceleration performance, good power output smoothness, simple control logic and good oil saving performance.
In one embodiment, the first motor generator is provided with a first motor shaft, and the first motor shaft is selectively linked with the engine and the planet carrier respectively.
In one embodiment, the first motor shaft is directly connected to the engine.
In one embodiment, the first motor shaft is coupled to the engine through a first transmission assembly.
In one embodiment, the first motor shaft is directly connected to the planet carrier.
In one embodiment, the first motor shaft includes: and a first extending end and a second extending end extending out of two ends of the first motor generator, wherein the first extending end is connected with the engine, and the second extending end is connected with the planet carrier.
In one embodiment, a clutch is provided between the ring gear and the carrier to selectively couple the ring gear to the carrier.
In one embodiment, the clutch includes: the clutch comprises a first friction plate arranged on the planet carrier and a second friction plate arranged on the ring gear, wherein the first friction plate and the second friction plate are selectively combined.
In one embodiment, the power transmission system further comprises: a brake configured to selectively lock the ring gear.
In one embodiment, the sun gear is directly connected to the power take-off shaft.
In one embodiment, the second motor generator is directly connected to the power output shaft.
In one embodiment, the second motor generator is coupled to the power take-off shaft via a second transmission assembly.
In one embodiment, both ends of the power output shaft are directly connected to the sun gear and the second motor generator, respectively.
In one embodiment, the power transmission system further comprises: and the differential is connected with the power output shaft through a third transmission assembly.
In one embodiment, the third transmission assembly comprises: the differential mechanism comprises a driving gear arranged on the power output shaft and a driven gear arranged on a shell of the differential mechanism and meshed with the driving gear.
The vehicle comprises the power transmission system, and the vehicle is provided with the power transmission system, so that the vehicle has the characteristics of high mechanical transmission efficiency, high power generation efficiency, high electric transmission efficiency, high braking power generation efficiency, good acceleration performance, good power output smoothness, simple control logic and good oil saving performance, is simple to operate, and can meet various different working conditions.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic illustration of a powertrain according to an embodiment of the present application;
FIG. 2 is a schematic illustration of a powertrain system according to another embodiment of the present application.
Reference numerals: 1-power transmission system, 11-engine, 12-first motor generator, 121-first motor shaft, 13-planet carrier, 131-planetary gear, 14-ring gear, 15-sun gear, 16-second motor generator, 17-power output shaft, 18-differential, 181-driven gear, 171-driving gear, 101-clutch, 102-brake, 103-first power output shaft, 104-second power output shaft.
Detailed Description
Technical solutions in embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. In the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
The power train system 1 for a vehicle of the embodiment of the present application is described in detail below with reference to fig. 1-2.
The power transmission system 1 for a vehicle according to the present application includes: the engine 11, the first motor generator 12, the planetary gear mechanism, and the second motor generator 16 and the power output shaft 17.
First, in the present application, the term "motor generator" refers to a device that can be used as a motor to output power outwards to convert electrical energy into mechanical energy, or as a generator to convert mechanical energy into electrical energy, and is explained herein without specific reference.
The first motor generator 12 is provided to be capable of interlocking with the engine 11, that is, the first motor generator 12 can be rotated by the engine 11, for example, the engine 11 can drive the first motor generator 12 to rotate for the purpose of generating power.
The planetary gear mechanism includes: a planet carrier 13, a ring gear 14 and a sun gear 15, wherein the planet carrier 13 is provided with a planetary gear 131, the planet carrier 13 is provided to be capable of interlocking with the first motor generator 12, that is, the planet carrier 13 can move synchronously with the first motor generator 12, for example, the first motor generator 12 can drive the planet carrier 13 to rotate, or the planet carrier 13 can drive a motor shaft of the first motor generator 12 to rotate so that the first motor generator 12 can generate electricity as a generator.
The ring gear 14 is provided outside the carrier 13 and meshes with the pinion gears 131, the ring gear 14 is selectively engageable with the carrier 13 and the ring gear 14 is also provided to be selectively locked.
When the gear ring 14 is separated from the planet carrier 13, the gear ring 14 and the planet carrier 13 can move relatively, at this time, when the planet carrier 13 rotates, the planet gear 131 on the planet carrier 13 can also rotate relatively to the gear ring 14, when the planet carrier 13 rotates, the gear ring 14 can be driven to rotate through the planet gear 131 on the planet carrier 13, so that the speed change is realized, and the gear ring 14 and the planet carrier 13 are in linkage relation; when the ring gear 14 is fixed with the planet carrier 13, the ring gear 14 and the planet carrier 13 rotate or are fixed synchronously, at this time, the planet gears 131 do not rotate relative to the ring gear 14 or the planet carrier 13, when the ring gear 14 is not locked and the planet carrier 13 rotates, the rotating speed of the ring gear 14 is the same as that of the planet carrier 13, the ring gear 14 can rotate synchronously and at the same speed under the driving of the planet carrier 13, because the planet carrier 13 does not move relative to the ring gear 14, the planet gears 131 on the planet carrier 13 do not rotate, and further, the planet gears 131 and the sun gear 15 do not rotate relatively, and the planet carrier 13, the ring gear 14, the planet gears 131 and the sun gear 15 are of an integral structure; the ring gear 14 and the planet carrier 13 are in linkage relation.
The ring gear 14 is also arranged to be selectively locked, the ring gear 14 not rotating when the ring gear 14 is locked, and if the planet carrier 13 is now engaged with the ring gear 14, the planet carrier 13 is also locked and not rotating; of course, when the ring gear 14 is locked and the ring gear 14 is not combined with the planet carrier 13, the planet carrier 13 can rotate relative to the ring gear 14, and can output power to the sun gear 15 under a proper working condition.
The second motor generator 16 and the sun gear 15 are both configured to be capable of linking with the power output shaft 17, that is, the second motor generator 16 can rotate simultaneously with the power output shaft 17, for example, the second motor generator 16 can drive the power output shaft 17 to rotate, or the power output shaft 17 can drive the second motor generator 16 to rotate in turn so as to generate power by the second motor generator 16; the sun gear 15 may rotate simultaneously with the power take-off shaft 17, for example the sun gear 15 may drive the power take-off shaft 17 to rotate, or the power take-off shaft 17 may drive the sun gear 15 to rotate. Of course, it is understood that the sun gear 15, the second motor generator 16 and the power take-off shaft 17 may be linked at the same time, for example, the sun gear 15 and the second motor generator 16 may drive the power take-off shaft 17 to rotate at the same time, or the power take-off shaft 17 may drive the sun gear 15 and the second motor generator 16 to rotate at the same time.
Various operating conditions of the powertrain 1 of the present application are described in detail below.
And (3) idle speed power generation working condition:
when the vehicle is idling, the engine 11 is kept in a working state, the planet carrier 13 is separated from the ring gear 14 and the ring gear 14 is not locked, so that the planet carrier 13 and the ring gear 14 are not combined together and keep synchronous rotation; the engine 11 drives the first motor generator 12 (specifically, drives the motor shaft of the first motor generator 12 to rotate), the first motor generator 12 drives the carrier 13 to rotate, but since the ring gear 14 is in an unfixed state, the engine 11 does not transmit power to the sun gear 15, and the engine 11 drives only the first motor generator 12, thereby enabling the first motor generator 12 to generate power.
It should be noted that the first motor generator 12 may first start the engine 11 as a driving motor and then serve as a generator to achieve the effect of generating power.
Pure electric forward/reverse gear working condition:
when the electric quantity of the battery exceeds a designed upper limit value, the engine 11 is out of order or it is merely intended to switch to electric drive, the carrier 13 and the ring gear 14 can be separated and not combined, and the ring gear 14 is not locked; the engine does not work, and meanwhile, the second motor generator 16 drives the power output shaft 17 to rotate, so that the purpose of pure electric driving of the vehicle is achieved. Because the engine 11 is linked with the first motor generator 12, the first motor generator 12 is linked with the planet carrier 13, and the driving resistance of the engine 11 is much larger than that of the ring gear 14, the sun gear 15 will drive the ring gear 14 to rotate freely when rotating along with the power driving shaft, and the engine 11 is stationary, that is, the second motor generator 16 will not drive the engine 11 to move. In this case, the carrier 13 is separated from the ring gear 14, the carrier and the ring gear 14 are not coupled, and the ring gear 14 is not locked, and in this case, the second motor generator 16 is rotated in the reverse direction, that is, the reverse gear operation is performed.
The range-increasing hybrid low-speed working condition is as follows:
when the battery capacity decreases to the design lower limit value, the carrier 13 is separated from the ring gear 14, the carrier 13 is not coupled to the ring gear 14, and the ring gear 14 is not locked. The first motor generator 12 is used as a motor to enter a power generation state after the engine 11 is started as a driving motor, the engine 11 drives the first motor generator 12, the first motor generator 12 drives the carrier 13 to rotate, but since the ring gear 14 is in a non-fixed state, the engine 11 does not transmit power to the sun gear 15, the engine 11 drives only the first motor generator 12, electric power generated by the first motor generator 12 can be supplied to the second motor generator 16, and the second motor generator 16 is used as a driving motor to drive the power output shaft 17 to rotate. At this time, the engine 11 is in the optimum efficiency region, and if the amount of electricity generated by the first motor generator 12 is larger than the amount of electricity required by the second motor generator 16, the surplus amount of electricity can be stored in the battery.
Mixed medium-speed working condition:
when the vehicle speed rises to a first set speed (the first set speed can be matched according to specific parameters such as the power and the torque of the engine 11 of the actual vehicle, the maximum vehicle speed and the transmission ratio of the vehicle design, and the like), the planet carrier 13 is combined with the gear ring 14 at the moment, and the gear ring 14 is not locked; at this time, the engine 11 may be selectively operated to drive the first motor generator 12 to rotate, the carrier 13 and the ring gear 14 to rotate, the carrier 13 drives the sun gear 15 and the power output shaft 17 to rotate, but the first motor generator 12 or/and the second motor generator 16 may also be selectively used as a driving motor to drive the power output shaft 17 to rotate, and the power of the engine 11 and the power of the first motor generator 12 or/and the second motor generator 16 may be jointly transmitted to the differential 18 of the vehicle.
Specifically, if the vehicle is in a constant speed state, power is provided by the engine 11, the power of the engine 11 reaches the power output shaft 17 through the first motor generator 12, the planet carrier 13, the gear ring 14 and the sun gear 15, and if the power of the engine 11 is surplus, the first motor generator 12 or/and the second motor generator 16 can be driven to generate electricity and store the electricity in the battery; if the vehicle needs to accelerate, power may be provided by the engine 11 together with the motor generators (the first motor generator 12 and/or the second motor generator 16), for example, the power of the engine 11 and the power of the first motor generator 12 may be coupled on the planet carrier 13 and the ring gear 14 and then transmitted to the sun gear 15 and the power output shaft 17 and then transmitted to the differential 18 of the vehicle, or the engine 11 and the second motor generator 16 may power the vehicle, in which case the power of the engine 11 may pass through the planet carrier 13 and the ring gear 14 and through the sun gear 15 to the power output shaft 17, and the power of the engine 11 and the power of the second motor generator 16 may be coupled on the power output shaft 17 and transmitted to the differential 18 of the vehicle.
Mixed high-speed working conditions:
when the vehicle speed rises to a second set speed (the second set speed can be matched according to specific parameters such as the power and the torque of the engine 11 of the actual vehicle, the maximum vehicle speed and the transmission ratio of the vehicle design, and the like), the planet carrier 13 is separated from the gear ring 14, the two are not combined, and the gear ring 14 is locked; at this time, the engine 11 may be selectively operated to drive the first motor generator 12 to rotate, the carrier 13 and the ring gear 14 to rotate, the carrier 13 drives the sun gear 15 and the power output shaft 17 to rotate, but the first motor generator 12 or/and the second motor generator 16 may also be selectively used as a driving motor to drive the power output shaft 17 to rotate, and the power of the engine 11 and the power of the first motor generator 12 or/and the second motor generator 16 may be jointly transmitted to the differential 18 of the vehicle.
Specifically, if the vehicle is in a constant speed state, power is provided by the engine 11, the power of the engine 11 reaches the power output shaft 17 through the first motor generator 12, the planet carrier 13, the gear ring 14 and the sun gear 15, and if the power of the engine 11 is surplus, the first motor generator 12 or/and the second motor generator 16 can be driven to generate electricity and store the electricity in the battery; if the vehicle needs to accelerate, the power can be provided by the engine 11 and the motor generator (the first motor generator 12 and/or the second motor generator 16) together, for example, the power of the engine 11 and the power of the first motor generator 12 can be coupled on the planet carrier 13 and then transmitted to the sun gear 15 and the power output shaft 17 and then transmitted to the differential 18 of the vehicle, or the engine 11 and the second motor generator 16 can provide the power for the vehicle, and the power of the engine 11 can reach the power output shaft 17 through the planet carrier 13 and the sun gear 15, and the power of the engine 11 and the power of the second motor generator 16 can be coupled on the power output shaft 17 and transmitted to the differential 18 of the vehicle; alternatively, the power of the engine 11 and the power of the first motor generator 12 are first coupled to the carrier 13, and then the coupled power and the power of the second motor generator 16 are coupled again to the power output shaft 17 and transmitted to the differential 18 of the vehicle.
The transmission ratio of the planetary gear train under the mixed high-speed working condition is greater than that of the planetary gear train under the mixed medium-speed working condition, so that the rotating speed of the sun gear 15 under the mixed high-speed working condition is greater than that of the sun gear 15 under the mixed medium-speed working condition, and the vehicle can be kept under the high-speed working condition.
Braking condition 1:
when the vehicle is decelerating, the planet carrier 13 and the ring gear 14 can be in a separated state, the planet carrier 13 and the ring gear 14 are not combined, the ring gear 14 is not locked, and the engine 11 can enter an idle starting condition (the specific working process is described above). At this time, the second motor generator 16 may be used as a generator, and the mechanical energy of the vehicle at the time of deceleration or braking may drive the second motor generator 16 through the power output shaft 17 so that the second motor generator 16 generates electric power.
And (3) braking condition 2:
when the vehicle is decelerated, the carrier 13 and the ring gear 14 can be combined without locking the ring gear 14, the second motor generator 16 can be used as a generator, and the mechanical energy of the vehicle during deceleration or braking can drive the second motor generator 16 through the power output shaft 17 so that the second motor generator 16 generates electric power; meanwhile, because the gear ring 14 and the planet carrier 13 are fixed, the sun gear 15 can drive the gear ring 14 and the planet carrier 13 to rotate so as to drive the first motor generator 12 and the engine 11 to rotate, because the driving resistance of the engine 11 is large, the engine 11 can be used for assisting braking, and the first motor generator 12 can also be used as a generator to participate in braking, so that the braking torque is further improved.
Parking working condition:
when the vehicle needs to be parked, the planet carrier 13 and the gear ring 14 can be combined, and the gear ring 14 is locked, so that the planet carrier 13 and the gear ring 14 are fixed, and the planet gears 131 on the planet carrier 13 cannot rotate; since the planetary gear 131 is fixed, the sun gear 15 engaged with the planetary gear 131 cannot rotate, and the power output shaft 17 linked with the sun gear 15 cannot rotate, thereby implementing a parking condition of the vehicle.
According to the power transmission system 1 for the vehicle, the planet carrier 13 and the gear ring 14 are selectively combined and the gear ring 14 is selectively locked, so that the power transmission system 1 for the vehicle has the characteristics of high mechanical transmission efficiency, high power generation efficiency, high electric transmission efficiency, high braking power generation efficiency, good acceleration performance, good power output smoothness, simple control logic and good oil saving performance, and in addition, the power transmission system 1 for the vehicle is simple in integral structure and easy to operate and can meet various different working conditions.
In some embodiments of the present application, the first motor generator 12 is provided with a first motor shaft 121, and the first motor shaft 121 is selectively linked with the engine 11 and the planet carrier 13, respectively. For example, the first motor shaft 121 may rotate with the rotation of the output shaft of the engine 11, while the planet carrier 13 may also rotate with the rotation of the first motor shaft 121; of course, the first motor shaft 121 may rotate along with the rotation of the planet carrier 13, and the output shaft of the engine 11 may rotate along with the rotation of the first motor shaft 121.
Further, as shown in fig. 1 and fig. 2, the first motor shaft 121 is directly connected to the engine 11, that is, the output end of the engine 11 is directly connected to the first motor shaft 121, and the rotation speed of the output end of the engine 11 is the rotation speed of the first motor shaft 121. Thereby, the entire structure of the power transmission system 1 is simplified.
Of course, it is understood that in other embodiments of the present application, the first motor shaft 121 is connected to the engine 11 through a first transmission assembly. Thus, the purpose of speed change between the engine 11 and the first motor shaft 121 can be achieved, for example, the first transmission assembly can be one or more sets of transmission gears disposed between the first motor shaft 121 and the engine 11.
In some embodiments of the present application, the first motor shaft 121 is directly connected to the planet carrier 13. That is, the rotational speed of the carrier 13 is the same as the rotational speed of the first motor shaft 121. Of course, other speed change mechanisms may be alternatively disposed between the planet carrier 13 and the first motor shaft 121, and will not be described in detail herein.
In one particular embodiment of the present application, as shown in fig. 1 and 2, the first motor shaft 121 includes: a first extended end and a second extended end extended from both ends of the first motor generator 12, the first extended end being connected to the engine 11, the second extended end being connected to the carrier 13. Specifically, the first protruding end is directly connected to the engine 11, the second protruding end is directly connected to the planet carrier 13, when the engine 11 drives the first motor shaft 121 to rotate, the first motor shaft 121 drives the planet carrier 13 to rotate, and the rotating speed of the output end of the engine 11 is the same as the rotating speed of the first motor shaft 121 and the rotating speed of the planet carrier 13.
In some embodiments of the present application, a clutch 101 is provided between the ring gear 14 and the planet carrier 13 so that the ring gear 14 and the planet carrier 13 can be selectively coupled. By controlling the on/off of the clutch 101, the ring gear 14 and the carrier 13 can be coupled or decoupled.
Specifically, the clutch 101 includes a first friction plate provided on the carrier 13 and a second friction plate provided on the ring gear 14, the first friction plate and the second friction plate being selectively coupled. Of course, the clutch 101 may have another structure as long as it is ensured that the ring gear 14 and the carrier 13 can be selectively coupled.
In some embodiments of the present application, the powertrain 1 further includes a brake 102, the brake 102 being configured to selectively lock the ring gear 14. For example, the brake 102 may be disengaged from the ring gear 14 so that the ring gear 14 is not locked, or the brake 102 may be engaged with the ring gear 14 so that the ring gear 14 is locked and the ring gear 14 does not rotate.
According to some embodiments of the present application, as shown in fig. 1 and 2, the sun gear 15 is directly connected to the power take-off shaft 17, that is, the sun gear 15 can rotate synchronously with the power take-off shaft 17, and the rotation speed of the sun gear 15 is the same as that of the power take-off shaft 17.
In other embodiments of the present application, the second motor generator 16 is directly connected to the power take-off shaft 17, that is, the second motor generator 16 may rotate synchronously with the power take-off shaft 17, and the rotation speed of the second motor generator 16 may be the same as the rotation speed of the power take-off shaft 17.
Alternatively, the second motor generator 16 and the power output shaft 17 may be connected through a second transmission assembly, that is, the second motor generator 16 and the power output shaft 17 may be indirectly connected, and the rotation speed between the second motor generator 16 and the power output shaft 17 is changed through the second transmission assembly.
In some embodiments of the present application, as shown in fig. 1, both ends of the power take-off shaft 17 are directly connected to the sun gear 15 and the second motor generator 16, respectively. That is, one end of the power take-off shaft 17 is directly connected to the sun gear 15, and the other end of the power take-off shaft 17 is directly connected to the second motor generator 16, so that the rotational speed of the sun gear 15, the rotational speed of the power take-off shaft 17, and the rotational speed of the second motor generator 16 are the same. The power take-off shaft 17 can be driven by the sun gear 15 and the second motor generator 16 to rotate, and the power take-off shaft 17 can also supply power to the second motor generator 16 or/and the sun gear 15.
Of course, as shown in fig. 2, the power output shaft 17 may further include a first power output shaft 103 and a second power output shaft 104 arranged at an interval, the second motor generator 16 is arranged between the first power output shaft 103 and the second power output shaft 104, one end of the first power output shaft 103 is connected to the sun gear 15, the other end of the first power output shaft 103 is connected to a motor shaft of the second motor generator 16, one end of the second power output shaft 104 is provided with the driving gear 171, and the other end of the second power output shaft 104 is connected to the motor shaft of the second motor generator 16.
It is understood that the motor shaft of the second motor generator 16 can extend from both sides of the second motor generator 16, and one end of the motor shaft is connected to the sun gear 15, and the other end is provided with the driving gear 171, and the motor shaft of the second motor generator 16 is the above-mentioned power output shaft 17.
In some embodiments of the present application, the power transmission system 1 further includes: and the differential 18, the differential 18 and the power output shaft 17 are connected through a third transmission assembly. Thus, the rotational speed of the power take-off shaft 17 and the rotational speed of the outer housing of the differential 18 can be varied by means of the third transmission assembly.
Further, the third transmission assembly includes: a drive gear 171 provided on the power take-off shaft 17 and a driven gear 181 provided on the housing of the differential 18, the drive gear 171 and the driven gear 181 meshing with each other. Thus, the rotation speed of the power output shaft 17 and the rotation speed of the outer case of the differential 18 can be changed by the drive gear 171 and the driven gear 181. Alternatively, both the driving gear 171 and the driven gear 172 may be bevel gears, so that the transmission direction of the variable force may be changed.
A specific embodiment of the present application is described in detail below.
According to the power transmission system 1 of an embodiment of the present application, the output end of the engine 11 is directly connected to one end of the first motor shaft 121 of the first motor generator 12, the other end of the first motor shaft 121 is directly connected to the carrier 13, both ends of the first motor shaft 121 extend from both sides of the first motor generator 12, a clutch 101 is provided between the carrier 13 and the ring gear 14, the clutch 101 can couple or decouple the carrier 13 and the ring gear 14 to or from each other, the ring gear 14 is also selectively locked by the brake 102, the sun gear 15 is directly connected to one end of the power take-off shaft 17, the other end of the power take-off shaft 17 is also directly connected to the second motor generator 16, a driving gear 171 is provided on the power take-off shaft 17, and the driving gear 171 is engaged with a driven gear 181 provided on the housing of the differential 18.
The power transmission system 1 is simple in overall structure, simple to operate, capable of meeting various different working conditions, and has the advantages of being high in mechanical transmission efficiency, power generation efficiency, electric transmission efficiency, braking power generation efficiency, acceleration performance, power output smoothness, control logic and fuel saving performance.
The mechanical transmission route of the power transmission system 1 of the embodiment of the present application: the engine 11 (the clutch 101 combines the planet carrier 13 and the ring gear 14, so that the planet carrier 13, the ring gear 14, the sun gear 15 and the power output shaft 17 are integrated) to the driven gear 181, and power transmission passes through a mechanical transmission pair (the driving gear 171 and the driven gear 181); when cruising at high speed, the ring gear 14 is locked, the clutch 101 is disengaged, and power transmission adds a gear pair from the carrier 13 to the sun gear 15, so that there are two mechanical gear pairs in total.
Mechanical power generation power transmission route: the engine 11 is directly connected with the first motor generator 12, and does not pass through any mechanical transmission pair, and only passes through one electric transmission pair (mechanical energy is converted into electric energy).
Braking power generation power transmission route: the engine 11 (the clutch 101 combines the planet carrier 13 and the ring gear 14, so that the planet carrier 13, the ring gear 14, the sun gear 15 and the power output shaft 17 are integrated) to the driven gear 181, and power transmission passes through a mechanical transmission pair; when the second motor generator 16 is used as a generator, power is transmitted from the driven gear 181 to the driving gear 171 (power output shaft 17), and from the power output shaft 17 to the second motor generator 16, via a mechanical transmission pair and an electric transmission pair; the energy transfer described above therefore takes place via a total of two mechanical gear pairs and one electrical gear pair.
When the ring gear 14 is fixed and the clutch 101 is disengaged, the power transmission increases the transmission pair from the planet carrier 13 to the sun gear 15, so that there are two mechanical transmission pairs in total, and when the second motor generator 16 is used as a generator, the power is transmitted from the driven gear 181 to the driving gear 171 (power output shaft 17), and from the power output shaft 17 to the second motor generator 16, and the power transmission passes through one mechanical transmission pair and one electric transmission pair; the energy transfer described above therefore takes place via a total of three mechanical gear pairs and one electrical gear pair.
An electric transmission line: when the second motor generator 16 is used as a driving motor, power is transmitted from the second motor generator 16 to the power output shaft 17 and then from the driving gear 171 on the power output shaft 17 to the driven gear 181 on the housing of the differential 18, and the power is transmitted through an electric transmission pair and a mechanical transmission pair.
The vehicle of the embodiment of the present application is briefly described below.
The vehicle comprises the power transmission system 1 of the embodiment, and the vehicle is provided with the power transmission system 1, so that the vehicle has the characteristics of high mechanical transmission efficiency, high power generation efficiency, high electric transmission efficiency, high braking power generation efficiency, good acceleration performance, good power output smoothness, simple control logic and good oil saving performance, is simple to operate, and can meet various different working conditions.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the methods and their core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (16)
1. A powertrain system for a vehicle, comprising:
an engine (11);
a first motor generator (12), the first motor generator (12) being provided so as to be capable of interlocking with an engine (11);
a planetary carrier (13), wherein a planetary gear (131) is arranged on the planetary carrier (13), and the planetary carrier (13) is arranged to be capable of being linked with a first motor generator (12);
-a ring gear (14), said ring gear (14) being arranged outside the planet carrier (13) and engaging with said planet gears (131), said ring gear (14) being selectively engageable with the planet carrier (13) and said ring gear (14) being further arranged to be selectively locked;
a sun gear (15), the sun gear (15) being disposed inside a carrier (13) and meshing with the planetary gears (131);
a second motor generator (16) and a power output shaft (17), wherein the second motor generator (16) and the sun gear (15) are both arranged to be capable of being linked with the power output shaft (17).
2. The drivetrain for a vehicle according to claim 1, characterized in that the first motor generator (12) is provided with a first motor shaft (121), the first motor shaft (121) being selectively interlocked with the engine (11) and the planet carrier (13), respectively.
3. The powertrain system for a vehicle according to claim 2, characterized in that the first motor shaft (121) is directly connected to an engine (11).
4. The drivetrain for a vehicle according to claim 2, characterized in that the first motor shaft (121) is connected to the engine (11) via a first transmission assembly.
5. The powertrain system for a vehicle according to claim 2, characterized in that the first motor shaft (121) is directly connected to the carrier (13).
6. The powertrain system for a vehicle according to claim 2, characterized in that the first motor shaft (121) includes: and a first extending end and a second extending end extending out of two ends of the first motor generator (12), wherein the first extending end is connected with the engine (11), and the second extending end is connected with the planet carrier (13).
7. A driveline for a vehicle according to claim 1, characterised in that a clutch (101) is provided between the ring gear (14) and the planet carrier (13) to selectively couple the ring gear (14) with the planet carrier (13).
8. The powertrain system for a vehicle according to claim 7, characterized in that the clutch (101) includes: a first friction plate provided on the carrier (13) and a second friction plate provided on the ring gear (14), the first and second friction plates being selectively engageable.
9. The powertrain system for a vehicle according to claim 1, further comprising: a brake (102), the brake (102) being arranged to selectively lock the ring gear (14).
10. The driveline for a vehicle according to claim 1, wherein the sun gear (15) is directly connected to the power take-off shaft (17).
11. The powertrain system for a vehicle according to claim 1, characterized in that the second motor generator (16) is directly connected to a power take-off shaft (17).
12. The powertrain system for a vehicle according to claim 1, wherein the second motor generator (16) is connected to the power take-off shaft (17) through a second transmission assembly.
13. The powertrain system for a vehicle according to claim 1, characterized in that both ends of the power output shaft (17) are directly connected to the sun gear (15) and the second motor generator (16), respectively.
14. The powertrain system for a vehicle according to claim 1, further comprising: and the differential (18), the differential (18) and the power output shaft (17) are connected through a third transmission assembly.
15. The driveline for a vehicle of claim 14, wherein the third transmission assembly comprises: a drive gear (171) provided on the power take-off shaft (17), and a driven gear (181) provided on the housing of the differential (18) and meshing with the drive gear (171).
16. A vehicle comprising a driveline as claimed in any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318794.6A CN113246714A (en) | 2021-03-25 | 2021-03-25 | Power transmission system for vehicle and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318794.6A CN113246714A (en) | 2021-03-25 | 2021-03-25 | Power transmission system for vehicle and vehicle |
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| Publication Number | Publication Date |
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| CN113246714A true CN113246714A (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110318794.6A Pending CN113246714A (en) | 2021-03-25 | 2021-03-25 | Power transmission system for vehicle and vehicle |
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| CN (1) | CN113246714A (en) |
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| CN210478381U (en) * | 2019-08-21 | 2020-05-08 | 长城汽车股份有限公司 | Power transmission system for vehicle and vehicle |
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| CN103273842A (en) * | 2013-06-26 | 2013-09-04 | 长城汽车股份有限公司 | Planet-gear differential device and hybrid power continuously variable transmission system and vehicle |
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