CN111645506B - Hybrid power system and vehicle - Google Patents

Hybrid power system and vehicle Download PDF

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Publication number
CN111645506B
CN111645506B CN201910160123.4A CN201910160123A CN111645506B CN 111645506 B CN111645506 B CN 111645506B CN 201910160123 A CN201910160123 A CN 201910160123A CN 111645506 B CN111645506 B CN 111645506B
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China
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power
planet row
clutch
engine
speed change
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CN111645506A (en
Inventor
吴胜涛
刘小伟
王印束
王富生
刘东方
程晓伟
李建锋
李兵兵
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Yutong Bus Co Ltd
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Yutong Bus Co Ltd
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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
    • B60K6/24—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
    • 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)
  • Structure Of Transmissions (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to a hybrid power system and a vehicle, wherein the system comprises an engine, a front speed change mechanism, a first motor, a first locking clutch and a rear power mechanism, the engine and the first motor are correspondingly connected with the front speed change mechanism, the engine is also connected with the rear power mechanism through the first locking clutch, the front speed change mechanism is correspondingly connected with the rear power mechanism, and the rear power mechanism is connected with an output shaft of the system. The power output end of the engine is connected with a front speed change mechanism and is also directly connected with a rear power mechanism through a first locking clutch. The engine can be output to the rear power mechanism through the front speed change mechanism, and can also be directly output to the rear power mechanism through the first locking clutch. And when first lock clutch is in different operating condition, the output torque of engine is different, consequently, according to actual need control first lock clutch's operating condition, and control flexibility is higher, and control system is in suitable operating mode according to actual need, can promote system power take off efficiency.

Description

Hybrid power system and vehicle
Technical Field
The invention relates to a hybrid power system and a vehicle, and belongs to the technical field of hybrid power systems.
Background
Compared with a series hybrid power system and a parallel hybrid power system, the series-parallel hybrid power system has great performance advantages, and the existing series-parallel hybrid power system mainly adopts a planetary mechanism as a power dividing device. The application publication number of CN103448529A discloses a planetary dual-mode oil-electricity hybrid power system, which comprises an engine, a front speed change mechanism, a first motor and a rear planet row, wherein the first motor is connected with a first transmission end of the front speed change mechanism, the engine is connected with a second transmission end of the front speed change mechanism, a third transmission end of the front speed change mechanism is connected with the rear planet row in output, and the rear planet row is connected with a system output shaft. Although the hybrid power system integrates the advantages of the series-parallel hybrid power system, certain defects still exist: the output power of the engine can be output only after passing through the front speed change mechanism, the output of the engine cannot be adjusted according to actual conditions, and the control flexibility is low. And this hybrid power system can't realize the engine of low-speed operating mode and directly drive the function, because the motor temperature rise can cause the lower problem of continuous grade of climbing in the big grade operating mode of climbing of low-speed to the power that the low-speed operating mode passes through the electric path is great, and system is inefficient. In addition, the hybrid power system cannot realize the function of simultaneously driving the double motors in the pure electric mode.
Disclosure of Invention
The invention aims to provide a hybrid power system which is used for solving the problems that the output power of an engine can be output only after passing through a speed change mechanism, cannot be adjusted according to actual conditions and is low in control flexibility. The invention also provides a vehicle, which is used for solving the problems that the output power of an engine in the existing vehicle can be output only after passing through a speed change mechanism, cannot be adjusted according to actual conditions and is low in control flexibility.
In order to achieve the above object, the scheme of the invention comprises:
the utility model provides a hybrid power system, includes engine, preceding speed change mechanism, first motor and back power unit, and speed change mechanism's first transmission end before the first motor is connected, and speed change mechanism's second transmission end before the power take off end of engine is connected, preceding speed change mechanism's third transmission end output connection back power unit's first power input end, back power unit's power take off end connected system output shaft, hybrid power system still includes first locking clutch, the power take off end of engine is connected the one end of first locking clutch, the second power input end of back power unit is connected to the other end of first locking clutch.
The power output end of the engine is directly connected with the rear power mechanism through the first locking clutch besides being connected with the front speed change mechanism, and the front speed change mechanism is also in output connection with the rear power mechanism, so that the output power of the engine can be output to the rear power mechanism through the front speed change mechanism and output by a system output shaft, or can be directly output to the rear power mechanism and output by the system output shaft when the first locking clutch is combined, and the system is in a fixed speed ratio mode of the engine at the moment. When first lock clutch is in different operating condition, the output torque of engine is different, consequently, controls first lock clutch's operating condition according to actual need, and control flexibility is higher, and control system is in suitable operating mode according to actual need, can promote system power take off efficiency. In addition, the system can also realize the function of simultaneously driving the double motors in the pure electric mode, and further improves the control flexibility of the system.
Furthermore, the rear power mechanism is a rear planet row, one of a rear sun gear, a rear planet carrier and a rear gear ring in the rear planet row is a rear first end of the rear planet row, one of the rear sun gear, the rear planet carrier and the rear gear ring is a rear second end of the rear planet row, and the other of the rear sun gear, the rear planet carrier and the rear gear ring is a rear third end of the rear planet row, the rear first end of the rear planet row is the second power input end, and the rear second end of the rear planet row is the first power input end and the power output end.
Further, the hybrid power system also comprises a second motor, and the second motor is connected with the system output shaft. The second motor is directly connected with the output shaft of the system, a mechanical transmission mechanism is not required to be arranged, mechanical loss can be avoided, and the efficiency of the system is improved.
Further, preceding speed change mechanism is preceding planet row, have one in preceding sun gear, preceding planet carrier and the preceding ring gear in the preceding planet row to be the preceding first end of preceding planet row, one is the preceding second end of preceding planet row, and one is the preceding third end of preceding planet row, the preceding first end of preceding planet row does first transmission end, the preceding second end of preceding planet row does the second transmission end, the preceding third end of preceding planet row does the third transmission end.
Further, the hybrid power system further comprises a second locking clutch, the power output end of the engine is connected with one end of the second locking clutch, and the other end of the second locking clutch is used for being connected with the shell. When the second locking clutch is combined, the power output end of the engine can be locked on the shell, the system can realize a pure electric driving mode and a braking energy recovery mode, and energy loss caused by idling of the engine is avoided.
Further, the system further comprises a third locking clutch, the front first end of the front planet row is connected with one end of the third locking clutch, and the other end of the third locking clutch is used for being connected with the shell. When the third locking clutch is combined, the first motor can be locked on the shell and cannot rotate, the system can realize an engine direct-drive mode and is suitable for high-speed running of a vehicle, the power requirement of the whole vehicle is in the driving working condition of an engine high-efficiency area, the electromechanical conversion problem existing in the hybrid power mode driving process is avoided, and the system efficiency is improved.
Further, preceding first end is preceding sun gear, preceding second end is preceding planet carrier, preceding third end is preceding ring gear, back first end is back sun gear, back second end is back planet carrier, back third end is back ring gear, back ring gear locking is on the casing.
The utility model provides a vehicle, includes vehicle body and a hybrid power system, hybrid power system includes engine, preceding speed change mechanism, first motor and rear power mechanism, and the first transmission end of preceding speed change mechanism is connected to first motor, and the second transmission end of speed change mechanism before the power take off end of engine connects, the third transmission end output connection of preceding speed change mechanism the first power input end of rear power mechanism, the power take off end connection system output shaft of rear power mechanism, hybrid power system still includes first locking clutch, the power take off end of engine connects the one end of first locking clutch, the second power input end of rear power mechanism is connected to the other end of first locking clutch.
The power output end of the engine in the vehicle is directly connected with the rear power mechanism through the first locking clutch besides being connected with the front speed change mechanism, and the front speed change mechanism is also in output connection with the rear power mechanism, so that the output power of the engine can be output to the rear power mechanism through the front speed change mechanism and output by a system output shaft, or can be directly output to the rear power mechanism and output by the system output shaft when the first locking clutch is combined, and the vehicle is in a fixed speed ratio mode of the engine at the moment. When first lock clutch is in different operating condition, the output torque of engine is different, consequently, controls first lock clutch's operating condition according to actual need, and control flexibility is higher, controls the vehicle according to actual need and is in suitable operating mode, can promote power take off efficiency. In addition, the vehicle can also realize the function of simultaneously driving the double motors, and the control flexibility is further improved.
Further, the rear power mechanism is a rear planet row, one of a rear sun gear, a rear planet carrier and a rear gear ring in the rear planet row is a rear first end of the rear planet row, one of the rear sun gear, the rear planet carrier and the rear gear ring is a rear second end of the rear planet row, and the other of the rear sun gear, the rear planet carrier and the rear gear ring is a rear third end of the rear planet row, the rear first end of the rear planet row is the second power input end, and the rear second end of the rear planet row is the first power input end and the power output end.
Further, the hybrid power system also comprises a second motor, and the second motor is connected with the system output shaft. The second motor is directly connected with the output shaft of the system, a mechanical transmission mechanism is not required to be arranged, mechanical loss can be avoided, and the system efficiency is improved.
Further, preceding speed change mechanism is preceding planet row, one in preceding sun gear, preceding planet carrier and the preceding ring gear in the preceding planet row is preceding first end of preceding planet row, one is preceding second end of preceding planet row, one is preceding third end of preceding planet row, preceding first end of preceding planet row is first transmission end, preceding second end of preceding planet row does the second transmission end, preceding third end of preceding planet row is the third transmission end.
Further, the hybrid power system further comprises a second locking clutch, the power output end of the engine is connected with one end of the second locking clutch, and the other end of the second locking clutch is used for being connected with the shell. When the second locking clutch is combined, the power output end of the engine can be locked on the shell, the system can realize a pure electric driving mode and a braking energy recovery mode, and energy loss caused by idling of the engine is avoided.
Further, the system further comprises a third locking clutch, the front first end of the front planet row is connected with one end of the third locking clutch, and the other end of the third locking clutch is used for being connected with the shell.
Further, preceding first end is preceding sun gear, preceding second end is preceding planet carrier, preceding third end is preceding ring gear, back first end is back sun gear, back second end is back planet carrier, back third end is back ring gear, back ring gear locking is on the casing. When the third locking clutch is combined, the first motor can be locked on the shell and cannot rotate, the system can realize a direct drive mode of the engine and is suitable for high-speed running of the vehicle, the power requirement of the whole vehicle is located in the drive working condition of an engine high-efficiency area, the electromechanical conversion problem existing in the drive of a hybrid power mode is avoided, and the system efficiency is improved.
Drawings
FIG. 1 is a detailed block diagram of a hybrid powertrain system provided by the present invention;
FIG. 2 is a logic diagram illustrating selection of an electric-only drive mode of the hybrid powertrain provided by the present invention;
FIG. 3 is a logic diagram illustrating the selection of a braking energy recovery mode for a hybrid powertrain provided by the present invention;
in fig. 1, 1 is an engine, 2 is a torsional vibration damper, 3 is a first motor, 4 is a motor controller, 5 is a third lock-up clutch, 6A is a front gear ring, 6B is a front planet carrier, 6C is a front sun gear, 7 is a power battery, 8 is a second lock-up clutch, 9A is a rear gear ring, 9B is a rear planet carrier, 9C is a rear sun gear, 10 is a second motor, 11 is a system output shaft, 12 is a rear axle, 13 is a wheel, and 14 is a first lock-up clutch.
Detailed Description
The embodiment of the vehicle is as follows:
the present embodiment provides a vehicle, which includes a vehicle body and a hybrid system, and therefore, the vehicle is a hybrid vehicle, and since the vehicle body belongs to the conventional technology and is not related to the protection point of the present invention, the description is omitted here, and the following description focuses on the hybrid system.
The hybrid system includes an engine 1, a front transmission mechanism, a first electric machine 3, a first lock clutch 14, a rear power mechanism, and a system output shaft 11. The front speed change mechanism comprises three transmission ends which are respectively a first transmission end, a second transmission end and a third transmission end, the rear power mechanism comprises a first power input end, a second power input end and a power output end, the first motor 3 is connected with the first transmission end of the front speed change mechanism, the power output end of the engine 1 is connected with the second transmission end of the front speed change mechanism, the third transmission end of the front speed change mechanism is connected with the first power input end of the rear power mechanism in output mode, the power output end of the engine 1 is further connected with one end of the first locking clutch 14, the other end of the first locking clutch 14 is connected with the second power input end of the rear power mechanism, and the power output end of the rear power mechanism is connected with the system output shaft.
Generally, the first transmission end and the second transmission end of the front speed change mechanism are power input ends, the third transmission end is a power output end, and a speed change structure is arranged in the front speed change mechanism, for example: and the gear set can realize the variable transmission ratio output of power. Of course, first transmission end, second transmission end and third transmission end are not restricted to power input or power output, and under some special operating mode, first transmission end and second transmission end can also become power output end, and the third transmission end becomes power input end, and the functional effect of these three transmission ends is decided according to the operating mode of reality. In one specific embodiment, the front derailleur is exemplified by a planetary gear train, which is referred to as a front planetary gear train. Similarly, although the rear power mechanism includes a first power input end, a second power input end and a power output end, the first power input end, the second power input end and the power output end are only used for distinguishing three transmission ends of the rear power mechanism, the three are not limited to power input or power output, under some special working conditions, the first power input end and the second power input end can also become the power output end, the power output end becomes the power input end, and the function and the effect of the three transmission ends are determined according to the actual operation working conditions. As a specific embodiment, the rear power mechanism is referred to as a rear planetary row, taking the planetary row as an example. In addition, as another specific embodiment, the rear power mechanism may be only one transmission shaft, the first power input end and the second power input end are one end of the transmission shaft, and the power output end is the other end of the transmission shaft.
The planet row comprises three ends, namely a first end, a second end and a third end, and the three ends of the planet row are respectively a sun gear, a planet carrier and a gear ring, so that the first end, the second end and the third end respectively correspond to one of the sun gear, the planet carrier and the gear ring. In the case of the rear planetary row, one of the rear sun gear 9C, the rear carrier 9B and the rear ring gear 9A of the rear planetary row is a rear first end of the rear planetary row, one is a rear second end of the rear planetary row, and one is a rear third end of the rear planetary row. In the case of the front planetary row, one of the front sun gear 6C, the front carrier 6B, and the front ring gear 6A of the front planetary row is a front first end of the front planetary row, one is a front second end of the front planetary row, and one is a front third end of the front planetary row.
Then, the front first end of the front planetary row is a first transmission end of the front speed change mechanism, the front second end of the front planetary row is a second transmission end of the front speed change mechanism, and the front third end of the front planetary row is a third transmission end of the front speed change mechanism. The rear first end of the rear planetary row is the second power input end of the rear power mechanism, and the rear second end of the rear planetary row is the first power input end and the power output end of the rear power mechanism, that is, the first power input end and the power output end of the rear power mechanism are the same end.
The first end, the second end and the third end of the planet row are not unique in corresponding relation with the sun gear, the planet carrier and the gear ring, six corresponding relations are provided in principle, and different corresponding relations represent different mechanical transmission transformation ratios, so that on the premise of meeting the operation requirement, the specific corresponding relation can be set according to actual needs, and in the embodiment, a specific corresponding relation is provided: the front first end of the front planet row is a front sun gear 6C, the front second end of the front planet row is a front planet carrier 6B, and the front third end of the front planet row is a front gear ring 6A; the rear first end of the rear planet row is a rear sun gear 9C, the rear second end of the rear planet row is a rear planet carrier 9B, and the rear third end of the rear planet row is a rear gear ring 9A.
Then, as shown in fig. 1, the power output end of the engine 1 is connected to the front carrier 6B, the torsional damper 2 is provided at the power output end of the engine 1, and the first motor 3 is connected to the front sun gear 6C. The power output end of the engine 1 is further connected with one end of a first locking clutch 14, the other end of the first locking clutch 14 is connected with the rear sun gear 9C, when the first locking clutch 14 is combined, namely locked, the power output end of the engine 1 and the rear sun gear 9C can be combined, and power output by the engine 1 can be directly supplied to the rear sun gear 9C. The front gear ring 6A is connected with a rear planet carrier 9B, the rear gear ring 9A is locked on the shell, and the rear planet carrier 9B is connected with a system output shaft 11. Furthermore, the system comprises a second electric machine 10, the second electric machine 10 is directly connected to a system output shaft 11, and the system output shaft 11 is connected to wheels 13 through a rear axle 12.
Furthermore, as shown in fig. 1, the system further includes a second lock-up clutch 8, the power output end of the engine 1 is connected with one end of the second lock-up clutch 8, the other end of the second lock-up clutch 8 is connected with the housing, when the second lock-up clutch 8 is combined, i.e. locked, the power output end of the engine 1 can be locked on the housing, and the system output shaft of the engine 1 cannot rotate. As shown in fig. 1, the system further includes a third lock-up clutch 5, the front sun gear 6C is connected to one end of the third lock-up clutch 5, and the other end of the third lock-up clutch 5 is connected to the housing, when the third lock-up clutch 5 is engaged, i.e. locked, the front sun gear 6C can be locked on the housing, and the front sun gear 6C and the first motor 3 cannot rotate.
In addition, the power battery 7 electrically connects the first motor 3 and the second motor 10 through the motor controller 4.
The above-mentioned housing may be a body housing of a vehicle, and may also be a housing of a hybrid system.
The following describes the various modes of operation of the system:
the pure electric driving mode mainly comprises three pure electric driving modes:
pure electric drive mode 1: the second motor 10 is driven independently, the first lock-up clutch 14 is in a non-lock-up state, the second lock-up clutch 8 is in a lock-up/non-lock-up state, the third lock-up clutch 5 is in a non-lock-up state, at the moment, the input of the system is the second motor 10, the output is the system output shaft 11, and the specific torque relationship is as follows: t is out ＝T MG2 ，T MG2 Is the torque, T, of the second electric machine 10 out Is the output torque of the system output shaft 11.
Pure electric drive mode 2: the first motor 3 is driven independently, the first lock-up clutch 14 is in a non-lock-up state, the second lock-up clutch 8 is in a lock-up state, the third lock-up clutch 5 is in a non-lock-up state, the input of the system is the first motor 3 at the moment, the output is the system output shaft 11, and the specific torque relationship is as follows: t is out ＝T MG1 *k 1 ，T MG1 Is the torque, k, of the first electric machine 3 1 Is the ratio of the radius of the front ring gear 6A to the radius of the front sun gear 6C.
Pure electric drive mode 3: the dual motors are driven simultaneously, the first locking clutch 14 is in a non-locking state, the second locking clutch 8 is in a locking state, the third locking clutch 5 is in a non-locking state, the input of the system is the first motor 3 and the second motor 10, the output is the system output shaft 11, and the specific torque relationship is as follows: t is out ＝T MG1 *k 1 +T MG2 。
A specific logic determination process for three pure electric driving modes is given as follows, as shown in fig. 2:
the first step is as follows: and starting judgment.
The second step: judging the driving power demand P of the whole vehicle drive ，P 1 Is the maximum power, P, of the first electric machine 3 2 Is the maximum power, P, of the second electric machine 10 1 ＜P 2 . If P is drive ＞P 2 And entering the third step, otherwise, entering the fourth step.
The third step: and entering a pure electric driving mode 3, and simultaneously driving the double motors.
The fourth step: if P drive ≤P 1 And entering a pure electric drive mode 2, wherein the first motor 3 is driven independently, otherwise, entering a pure electric drive mode 1, and the second motor 10 is driven independently.
Hybrid mode: the first lock-up clutch 14 is in a non-lock-up state, the second lock-up clutch 8 is in a non-lock-up state, the third lock-up clutch 5 is in a non-lock-up state, at the moment, the input of the system is the engine 1 and the second motor 10, the output is the system output shaft 11, and the specific torque relationship is as follows: t is a unit of out ＝T E *k 1 /(1+k 1 )+T MG2 ，T E Is the torque of the engine 1.
Fixed ratio mode: the first lock-up clutch 14 is in a lock-up state, the second lock-up clutch 8 is in a non-lock-up state, the third lock-up clutch 5 is in a non-lock-up state, at the moment, the input of the system is the engine 1, the output is the system output shaft 11, and the specific torque relationship is as follows: t is a unit of out ＝T E *(1+k 2 )，k 2 Is the ratio of the radius of the rear ring gear 9A to the radius of the rear sun gear 9C.
The engine direct drive mode: the first lock-up clutch 14 is in a non-lock-up state, the second lock-up clutch 8 is in a non-lock-up state, the third lock-up clutch 5 is in a lock-up state, at the moment, the input of the system is the engine 1, the output is the system output shaft 11, and the specific torque relationship is as follows: t is a unit of out ＝T E *k 1 /(1+k 1 ). The direct-drive mode of the engine is suitable for driving the vehicle at a high speed, and the power requirement of the whole vehicle is in the driving working condition of an engine high-efficiency area, so that the engine is avoidedThe electromechanical conversion problem exists when the hybrid power mode drives, and the system efficiency is improved.
The braking energy recovery modes are divided into three types:
braking energy recovery mode 1: the second electric machine 10 is braked alone, the first lock-up clutch 14 is in the non-lock-up state, the second lock-up clutch 8 is in the lock-up/non-lock-up state, and the third lock-up clutch 5 is in the non-lock-up state. At this time, the input of the system is the system output shaft 11, the output is the second motor 10, and the specific torque relationship is as follows: t is a unit of MG2 ＝T out 。
Braking energy recovery mode 2: the first motor 3 is braked independently, the first lock-up clutch 14 is in a non-lock-up state, the second lock-up clutch 8 is in a lock-up state, the third lock-up clutch 5 is in a non-lock-up state, the input of the system is the system output shaft 11 at the moment, the output is the first motor 3, and the specific torque relationship is as follows: t is a unit of MG1 ＝T out /k 1 。
Braking energy recovery mode 3: the double motors participate in braking energy recovery at the same time, the first locking clutch 14 is in a non-locking state, the second locking clutch 8 is in a locking state, the third locking clutch 5 is in a non-locking state, at the moment, the input of the system is the first motor 3 and the second motor 10, the output is the system output shaft 11, and the specific torque relationship is as follows: t is a unit of MG1 *k 1 +T MG2 ＝T out 。
A specific logic determination process for three braking energy recovery modes is given below, as shown in fig. 3:
the first step is as follows: and starting judgment.
The second step is that: judging the braking power demand P of the whole vehicle brake ，P 1 Is the maximum power, P, of the first electric machine 3 2 Is the maximum power, P, of the second electric machine 10 1 ＜P 2 . If P is brake ＞P 2 And entering the third step, otherwise, entering the fourth step.
The third step: and (5) entering a braking energy recovery mode 3, and simultaneously braking by the double motors.
The fourth step: if P brake ≤P 1 Entering into braking energy recoveryIn the mode 2, the first motor 3 is braked independently, otherwise, the braking energy recovery mode 1 is entered, and the second motor 10 is braked independently.
Table 1 shows the operating states of the components in the respective operating modes.
TABLE 1
Figure BDA0001984343600000101
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Figure BDA0001984343600000111
Therefore, based on the specific configuration shown in fig. 1, a fixed speed ratio mode of the engine 1 can be realized by using the first lock-up clutch 14 for a low-speed and high-grade climbing condition, and the engine 1 directly drives the whole vehicle at a fixed speed ratio, so that the system efficiency is improved. When the first lock-up clutch 14 is engaged, the torque output from the engine 1 is increased, and therefore, when the torque output from the engine 1 is smaller than the target torque, the difference between the two is not so large, and thus, it is not necessary to output the relevant motor and supplement an excessive torque, and it is possible to avoid the problem of the over-temperature of the motor caused by the increase of the output torque of the relevant motor to approach the external characteristic. Moreover, by controlling the working state of the first lock-up clutch 14, the system can be in a proper working mode, and the system efficiency is improved. In addition, the first motor 3 and the second motor 10 can be driven or braked simultaneously by using the second locking clutch 8, so that the system dynamic property is improved, the system braking energy recovery rate can be improved, and the system energy consumption is further reduced. In addition, the second motor 10 is directly connected with the system output shaft 11, one-stage mechanical transmission is omitted, and the system efficiency is improved.
Hybrid powertrain embodiment:
the present embodiment provides a hybrid system that can be protected separately, and since the hybrid system has been described in detail in the above vehicle embodiments, it will not be described herein again.
The specific embodiments are given above, but the present invention is not limited to the described embodiments. The basic idea of the present invention lies in the above basic solution, and it is not necessary for those skilled in the art to expend creative efforts to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.

Claims (8)

1. A hybrid power system comprises an engine, a front speed change mechanism, a first motor and a rear power mechanism, wherein the first motor is connected with a first transmission end of the front speed change mechanism, a power output end of the engine is connected with a second transmission end of the front speed change mechanism, a third transmission end of the front speed change mechanism is in output connection with a first power input end of the rear power mechanism, and a power output end of the rear power mechanism is connected with a system output shaft;
the rear power mechanism is a rear planet row, one of a rear sun gear, a rear planet carrier and a rear gear ring in the rear planet row is a rear first end of the rear planet row, one of the rear sun gear, the rear planet carrier and the rear gear ring in the rear planet row is a rear second end of the rear planet row, the other of the rear sun gear, the rear planet carrier and the rear gear ring in the rear planet row is a rear third end of the rear planet row, the rear first end of the rear planet row is the second power input end, and the rear second end of the rear planet row is the first power input end and the power output end;
the front speed change mechanism is a front planet row, one of a front sun gear, a front planet carrier and a front gear ring in the front planet row is a front first end of the front planet row, one of the front sun gear, the front planet carrier and the front gear ring is a front second end of the front planet row, and the other of the front sun gear, the front planet carrier and the front gear ring is a front third end of the front planet row;
the front first end is a front sun gear, the front second end is a front planet carrier, the front third end is a front gear ring, the rear first end is a rear sun gear, the rear second end is a rear planet carrier, the rear third end is a rear gear ring, and the rear gear ring is locked on the shell.
2. The hybrid system of claim 1, further comprising a second electric machine coupled to the system output shaft.
3. The hybrid system according to claim 1, further comprising a second lock-up clutch, wherein a power output end of the engine is connected to one end of the second lock-up clutch, and the other end of the second lock-up clutch is used for connecting a housing.
4. The hybrid system of claim 1 further comprising a third lockup clutch, wherein the front first end of the front planetary row is connected to one end of the third lockup clutch, and the other end of the third lockup clutch is used for connecting to a housing.
5. A vehicle comprises a vehicle body and a hybrid power system, wherein the hybrid power system comprises an engine, a front speed change mechanism, a first motor and a rear power mechanism, the first motor is connected with a first transmission end of the front speed change mechanism, a power output end of the engine is connected with a second transmission end of the front speed change mechanism, a third transmission end of the front speed change mechanism is in output connection with a first power input end of the rear power mechanism, and a power output end of the rear power mechanism is connected with a system output shaft;
the rear power mechanism is a rear planet row, one of a rear sun gear, a rear planet carrier and a rear gear ring in the rear planet row is a rear first end of the rear planet row, one of the rear sun gear, the rear planet carrier and the rear gear ring is a rear second end of the rear planet row, and one of the rear sun gear, the rear planet carrier and the rear gear ring is a rear third end of the rear planet row, the rear first end of the rear planet row is the second power input end, and the rear second end of the rear planet row is the first power input end and the power output end;
the front speed change mechanism is a front planet row, one of a front sun gear, a front planet carrier and a front gear ring in the front planet row is a front first end of the front planet row, one of the front sun gear, the front planet carrier and the front gear ring is a front second end of the front planet row, and the other of the front sun gear, the front planet carrier and the front gear ring is a front third end of the front planet row;
the front first end is a front sun gear, the front second end is a front planet carrier, the front third end is a front gear ring, the rear first end is a rear sun gear, the rear second end is a rear planet carrier, the rear third end is a rear gear ring, and the rear gear ring is locked on the shell.
6. The vehicle of claim 5, characterized in that the hybrid powertrain system further comprises a second electric machine coupled to the system output shaft.
7. The vehicle of claim 5, characterized in that the hybrid system further comprises a second lock-up clutch, the power output end of the engine is connected with one end of the second lock-up clutch, and the other end of the second lock-up clutch is used for connecting a housing.
8. The vehicle of claim 5, characterized in that the system further comprises a third lockup clutch, wherein a front first end of the front planetary row is connected with one end of the third lockup clutch, and the other end of the third lockup clutch is used for connecting with a housing.
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