CN110857028A - Hybrid power drive system - Google Patents
Hybrid power drive system Download PDFInfo
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- CN110857028A CN110857028A CN201810963425.0A CN201810963425A CN110857028A CN 110857028 A CN110857028 A CN 110857028A CN 201810963425 A CN201810963425 A CN 201810963425A CN 110857028 A CN110857028 A CN 110857028A
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- 238000010248 power generation Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 5
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- 230000005540 biological transmission Effects 0.000 description 47
- 238000010586 diagram Methods 0.000 description 22
- 238000002485 combustion reaction Methods 0.000 description 5
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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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
- B60K6/38—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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
A hybrid power driving system comprises an engine, a first motor, a second motor, a planetary gear device, a clutch gear device and a switch device, wherein the engine and the first motor are both connected with the planetary gear device; the planetary gear arrangement comprises a first rotating element, a second rotating element and a third rotating element, the third rotating element having a rotating axle, the first motor being connected to the third rotating element or to the rotating axle; the clutch gear device includes a first clutch and a second clutch, the first clutch connects the engine and the rotary axle, the second clutch connects the first rotary element and the third rotary element, or the second clutch connects the second rotary element and the third rotary element; the second motor is arranged in parallel with the first motor, and the second motor is connected to the output end. The hybrid power driving system has multiple working modes and good platformization.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a hybrid power driving system.
Background
The transmissions on the market at present mainly comprise a step transmission and a continuously variable transmission. Step-variable transmissions are subdivided into manual and automatic. They most provide a limited number of discrete output-to-input speed ratios through different meshing arrangements of gear trains or planetary gear trains. The speed of the drive wheels between two adjacent speed ratios is adjusted by means of the speed variation of the internal combustion engine. Continuously variable transmissions, whether mechanical, hydraulic, or electromechanical, provide an infinite number of continuously selectable speed ratios over a range of speeds, and theoretically, the speed change of the drive wheels can be accomplished entirely through the transmission. In this way, the internal combustion engine can be operated in the optimum speed range as much as possible. Meanwhile, compared with a stepped transmission, the stepless transmission has the advantages of stable speed regulation, full utilization of the maximum power of an internal combustion engine and the like, so that the stepless transmission is a subject of research of engineers in various countries for many years.
In recent years, the emergence of motor hybrid technology has opened up a new approach for achieving complete matching of power between an internal combustion engine and a power wheel. Among the many designs of the powertrain, the most representative are the series hybrid system and the parallel hybrid system. In the motor series hybrid system, an internal combustion engine, a generator, a motor, a shafting and a driving wheel form a series power chain, and the power assembly has a very simple structure. Wherein the generator, motor combination can be considered as a transmission in the conventional sense. When used in combination with an energy storage device, such as a battery, capacitor, etc., the transmission may also function as an energy modulation device to accomplish independent speed and torque modulation.
The motor parallel system is provided with two parallel independent power chains. One is composed of a traditional mechanical speed changer, and the other is composed of a motor and a battery system. The mechanical transmission is responsible for adjusting the speed, and the motor and the battery system are responsible for adjusting the power or the torque. In order to fully develop the potential of the whole system, the mechanical transmission also needs to adopt a stepless speed change mode.
The serial hybrid system has the advantages of simple structure and flexible layout. However, all power passes through the generator and the motor, so the power requirement of the motor is high, the volume is large, and the weight is heavy. Meanwhile, the energy transmission process is electromechanical twice, and the conversion of the motor is realized, so that the efficiency of the whole system is low. In the parallel hybrid system, only part of power passes through the motor system, so the power requirement on the motor is relatively low, and the efficiency of the whole system is high. However, the system needs two sets of independent subsystems and is high in manufacturing cost. Typically only for weak mixing systems.
Disclosure of Invention
In view of this, the present invention provides a hybrid driving system, which has multiple working modes and is well-platformized.
A hybrid power driving system comprises an engine, a first motor, a second motor, a planetary gear device, a clutch gear device and a switch device, wherein the engine and the first motor are both connected with the planetary gear device; the planetary gear arrangement comprises a first rotating element, a second rotating element and a third rotating element, the third rotating element having a rotating axle, the first motor being connected to the third rotating element or to the rotating axle; the clutch gear device includes a first clutch and a second clutch, the first clutch connects the engine and the rotary axle, the second clutch connects the first rotary element and the third rotary element, or the second clutch connects the second rotary element and the third rotary element; the switch device locks or unlocks the first rotating element; the second motor is arranged in parallel with the first motor, and the second motor is connected to the output end.
In an embodiment of the present invention, the second clutch includes a driving portion connected to the third rotating element and a driven portion connected to the first rotating element or the second rotating element; alternatively, the driven part is connected to the third rotating element, and the driving part is connected to the first rotating element or the second rotating element.
In an embodiment of the present invention, the engine, the planetary gear device, and the first motor are coaxially disposed.
In an embodiment of the present invention, the first motor has a first motor output shaft, a first gear is disposed on the first motor output shaft, a second gear is disposed on the rotating wheel shaft, and the first gear and the second gear are engaged with each other.
In an embodiment of the present invention, the first rotating element is a sun gear, the second rotating element is a carrier, the third rotating element is a ring gear, and the switching device is a brake or a one-way clutch;
the first motor is provided with a first motor output shaft, and the first motor output shaft is connected with the gear ring; the first clutch is operative to engage the engine and the rotating axle; the sun gear and the gear ring are locked when the second clutch works, or the planet carrier and the gear ring are locked when the second clutch works;
the brake or the one-way clutch brakes or unlocks the sun gear;
the hybrid power driving system further comprises an intermediate shaft, a third gear is arranged on the intermediate shaft, and the third gear is meshed with the planet carrier;
the second motor is provided with a second motor output shaft, a fourth gear is arranged on the second motor output shaft, and the fourth gear is meshed with the third gear.
In an embodiment of the invention, the hybrid power drive system further comprises a differential, the differential is provided with a differential gear, the intermediate shaft is further provided with a fifth gear, and the fifth gear is meshed with the differential gear.
In an embodiment of the present invention, the hybrid drive system has a single-motor electric-only mode, a dual-motor electric-only first-gear mode, a dual-motor electric-only second-gear mode, a range-extending mode, an engine single-drive first-gear mode, an engine single-drive second-gear mode, a first-stage hybrid mode, a second-stage hybrid mode, and a parking power generation mode.
In an embodiment of the present invention, in the single-motor electric-only mode, none of the first clutch, the second clutch, the brake or one-way clutch, the engine, and the first motor operate, and the second motor drives; in the dual-motor pure electric first-gear mode, the engine, the first clutch and the second clutch do not work, the brake or the one-way clutch works, the brake or the one-way clutch brakes the sun gear, and the first motor and the second motor are both driven; under the two-motor pure electric two-gear mode, the engine, first clutch is out of work, stopper or one-way clutch are out of work, the second clutch locks the sun gear with the ring gear, perhaps the second clutch locks the planet carrier with the ring gear, first motor with the second motor all drives.
In an embodiment of the present invention, in the range extending mode, the first clutch is operated, the first clutch engages the engine and the rotating axle, the second clutch is not operated, the brake or the one-way clutch is not operated, the engine drives the first motor to generate electricity, the first motor provides electric energy for the second motor, and the second motor drives the first motor.
In an embodiment of the present invention, in the engine-driven-alone first-gear mode, the first clutch is operated, the brake or one-way clutch is operated, the first clutch engages the engine and the rotating axle, the brake or one-way clutch brakes the sun gear, the second clutch, the first motor, and the second motor are not operated, and the engine is driven; in the engine single-drive second-gear mode, the first clutch and the second clutch work, the first clutch is connected with the engine and the rotating wheel shaft, the second clutch locks the sun gear and the gear ring, or the second clutch locks the planet carrier and the gear ring, the first motor, the second motor and the brake or the one-way clutch do not work, and the engine drives.
In an embodiment of the present invention, in the one-stage hybrid mode, the first clutch is operated, the brake or one-way clutch is operated, the first clutch engages the engine and the rotating axle, the brake or one-way clutch brakes the sun gear, the second clutch is not operated, and the engine, the first motor, and the second motor are driven; in the two-stage hybrid mode, the first clutch and the second clutch operate, the first clutch engages with the engine and the rotating wheel shaft, the second clutch locks the sun gear and the gear ring, or the second clutch locks the planet carrier and the gear ring, the brake or the one-way clutch does not operate, and the engine, the first motor and the second motor are all driven.
In an embodiment of the present invention, in the parking power generation mode, the first clutch is operated, the first clutch engages the engine and the rotating axle, the second clutch and the brake or one-way clutch are not operated, and the power of the engine is transmitted to the first motor to generate power.
In an embodiment of the present invention, the first rotating element is a sun gear, the second rotating element is one of a ring gear and a carrier, the third rotating element is the other of the ring gear and the carrier, and the switching device is a brake or a one-way clutch.
In an embodiment of the present invention, the first rotating element is a carrier, the second rotating element is one of a sun gear and a ring gear, the third rotating element is the other of the sun gear and the ring gear, and the switching device is a brake or a one-way clutch.
The engine and the first motor of the hybrid power driving system are both connected with the planetary gear device, and the clutch gear device is arranged between the engine and the first motor; the planetary gear arrangement comprises a first rotating element, a second rotating element and a third rotating element, the third rotating element having a rotating axle, the first motor being connected to the third rotating element or to the rotating axle; the clutch gear device includes a first clutch and a second clutch, the first clutch connects the engine and the rotary axle, the second clutch connects the first rotary element and the third rotary element, or the second clutch connects the second rotary element and the third rotary element; the switch device locks or unlocks the first rotating element; the second motor is arranged in parallel with the first motor, and the second motor is connected to the output end. The hybrid power driving system can work in a single-motor pure electric mode, a double-motor pure electric first-gear mode, a double-motor pure electric second-gear mode, a range extending mode, an engine single-drive first-gear mode, an engine single-drive second-gear mode, a first-stage hybrid mode, a second-stage hybrid mode and a parking power generation mode, and has high flexibility. The hybrid power driving system can cover HEV vehicle types and PHEV vehicle types, and is good in platform.
Drawings
Fig. 1 is a schematic configuration diagram of a hybrid drive system of a first embodiment of the invention.
Fig. 2 is a power transmission schematic diagram of the hybrid drive system of the first embodiment of the invention in the single-motor electric-only mode.
FIG. 3 is a power transmission diagram of the hybrid power-driven system in the two-motor electric-only first gear mode according to the first embodiment of the invention.
FIG. 4 is a power transmission diagram of the hybrid drive system in the two-motor electric-only second gear mode according to the first embodiment of the invention.
Fig. 5 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the range extending mode.
Fig. 6 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the engine-alone drive first-speed mode.
Fig. 7 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the engine-alone driven second speed mode.
Fig. 8 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the one-stage hybrid mode.
Fig. 9 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the two-stage hybrid mode.
Fig. 10 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the parking power generation mode.
Fig. 11 is a schematic configuration diagram of a hybrid drive system of a fourth embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
First embodiment
Fig. 1 is a schematic configuration diagram of a hybrid drive system of a first embodiment of the invention. As shown in fig. 1, the hybrid drive system 10 includes an engine 11, a planetary gear device, a first electric machine 13, a clutch gear device, a switching device, an intermediate shaft 16, a second electric machine 17, a differential 18, and a power battery (not shown).
The engine 11 is, for example, a gasoline engine or a diesel engine.
The planetary gear device includes a first rotating element, a second rotating element, and a third rotating element. The third rotating element is provided with a rotating wheel shaft 127, the third rotating element is fixed on the rotating wheel shaft 127, the rotating wheel shaft 127 and the third rotating element can synchronously rotate, and the rotating wheel shaft 127 is connected with the first motor 13. In the present embodiment, the first rotating element is, for example, the sun gear 121, the second rotating element is, for example, the carrier 124, and the third rotating element is, for example, the ring gear 126. The planet carrier 124 is provided with planet wheels 125, the planet wheels 125 are connected to the planet carrier 124 through rolling or sliding bearings, the sun wheel 121 is arranged in the ring gear 126, and the sun wheel 121 is meshed with the planet wheels 125 and the ring gear 126 respectively.
The first motor 13 has a first motor output shaft 131, and the first motor output shaft 131 is connected to the ring gear 126 or the rotary axle 127. The first motor 13, the planetary gear device, and the engine 11 are coaxially disposed. In the present embodiment, the first motor 13 is a driving and power generating integrated machine.
The clutch gear device includes a first clutch 141 and a second clutch 142. The second clutch 142 includes a driving portion 142a and a driven portion 142b, the driving portion 142a being connected to the ring gear 126, and the driven portion 142b being connected to the carrier 124. In the present embodiment, the first clutch 141 engages the engine 11 and the rotary axle 127, for example, when the first clutch 141 is operated, the first clutch 141 engages the engine 11 and the rotary axle 127; when the first clutch 141 is not operated, the first clutch 141 disengages the engine 11 from the rotating hub 127. The second clutch 142 locks the first rotating element (sun gear 121) and the third rotating element (ring gear 126), or the second clutch 142 locks the second rotating element (carrier 124) and the third rotating element (ring gear 126), for example, when the second clutch 142 is operated, the second clutch 142 locks the sun gear 121 and the ring gear 126, or the second clutch 142 locks the carrier 124 and the ring gear 126, i.e., the driving portion 142a and the driven portion 142b of the second clutch 142 are combined; when the second clutch 142 is not operated, the second clutch 142 separates the sun gear 121 from the ring gear 126, or the second clutch 142 separates the carrier 124 and the ring gear 126, i.e., the driving portion 142a of the second clutch 142 is disconnected from the driven portion 142 b.
The switching device is used to lock or unlock the sun gear 121 (first rotating element). In the present embodiment, the switching device is, for example, a brake 151 or a one-way clutch, and the brake 151 or the one-way clutch is used to brake or unlock the sun gear 121. In the present embodiment, when the brake 151 or the one-way clutch is operated, the brake 151 or the one-way clutch brakes the sun gear 121; when the brake 151 or the one-way clutch is not operated, the brake 151 or the one-way clutch unlocks the sun gear 121.
The intermediate shaft 16 is provided with a third gear 161 and a fifth gear 162, the third gear 161 and the fifth gear 162 are arranged at intervals, and the third gear 161 is meshed with the planet carrier 124.
The second motor 17 is arranged in parallel with the first motor 13, and the second motor 17 is connected to the output terminal. Specifically, the second motor 17 has a second motor output shaft 171, and a fourth gear 172 is disposed on the second motor output shaft 171, and the fourth gear 172 is meshed with the third gear 161. In this embodiment, the second motor 17 is a driving and power generating integrated machine.
The differential 18 is provided with a differential gear 181, and the differential gear 181 is meshed with the fifth gear 162. In this embodiment, the differential 18 is used to adjust the difference between the rotational speeds of the left and right wheels, so that the left and right wheels roll at different rotational speeds when the vehicle is turning or driving on uneven road surfaces, thereby ensuring that the wheels are driven by both sides to perform pure rolling motion.
The power battery is electrically connected with the first motor 13 and the second motor 17 respectively. The power battery supplies electric power for driving the first motor 13 and the second motor 17, and electric power generated by rotation of the first motor 13 and the second motor 17 may be stored in the power battery. In the present embodiment, the engine 11 drives the first electric machine 13 to rotate through the planet carrier 124 and the sun gear 121 to generate electric energy, and the electric energy can be stored in the power battery; when the automobile is braked, power is transmitted to the second motor 17 from the wheel end through the differential 18, the differential gear 181, the fifth gear 162, the third gear 161 and the fourth gear 172, so that the second motor 17 is driven to rotate to generate electric energy, and the electric energy can be stored in a power battery; when parking, the power of the engine 11 is transmitted to the first electric machine 13 through the sun gear 121, and the first electric machine 13 is rotated to generate electric power.
The hybrid drive system 10 of the present invention has a single-motor electric-only mode, a dual-motor electric-only first-gear mode, a dual-motor electric-only second-gear mode, a range-extending mode, an engine single-drive first-gear mode, an engine single-drive second-gear mode, a primary hybrid mode, a secondary hybrid mode, and a parking power generation mode.
Fig. 2 is a power transmission schematic diagram of the hybrid drive system of the first embodiment of the invention in the single-motor electric-only mode. As shown in fig. 2, the power transmission direction is as indicated by the arrow in the drawing, and in the single-motor electric-only mode, the first clutch 141 and the second clutch 142 are not operated, the brake 151 or the one-way clutch is not operated, the engine 11 and the first motor 13 are not operated, and the second motor 17 is driven. In the present embodiment, the power transmission has a path from the second motor 17 through the fourth gear 172 to the third gear 161, the intermediate shaft 16, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 can be driven in the single-motor electric-only mode when the vehicle is running at full speed.
FIG. 3 is a power transmission diagram of the hybrid power-driven system in the two-motor electric-only first gear mode according to the first embodiment of the invention. As shown in fig. 3, the power transmission direction is as indicated by the arrow in the drawing, and in the dual-motor electric-only first-gear mode, the engine 11, the first clutch 141, and the second clutch 142 are not operated, the brake 151 or the one-way clutch is operated, the brake 151 or the one-way clutch brakes the sun gear 121, and the first motor 13 and the second motor 17 are all driven. In the present embodiment, the power transmission has two paths, wherein in the first path, the first electric machine 13 is transmitted to the intermediate shaft 16 through the ring gear 126, the planet gear 125 and the planet carrier 124, and then to the third gear 161, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end; on path two, the second motor 17 is transmitted through the fourth gear 172 to the third gear 161, the intermediate shaft 16, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 can be driven in the dual-motor pure electric first gear mode when the vehicle is running at a medium or low speed.
FIG. 4 is a power transmission diagram of the hybrid drive system in the two-motor electric-only second gear mode according to the first embodiment of the invention. As shown in fig. 4, the power transmission direction is as shown by the arrow in the figure, in the dual-motor electric-only second-gear mode, the engine 11 and the first clutch 141 are not operated, the brake 151 or the one-way clutch is not operated, the second clutch 142 is operated, the second clutch 142 locks the sun gear 121 and the ring gear 126 (the sun gear 121 and the ring gear 126 are locked into a whole, the whole planetary gear device rotates integrally, the speed ratio is 1), or the second clutch 142 locks the planet carrier 124 and the ring gear 126, and the first motor 13 and the second motor 17 are both driven. In the present embodiment, the power transmission has two paths, wherein in the first path, the first motor 13 is transmitted to the intermediate shaft 16 through the whole planetary gear device, and then to the third gear 161, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end; on path two, the second motor 17 is transmitted through the fourth gear 172 to the third gear 161, the intermediate shaft 16, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 can be driven in the two-motor pure electric second gear mode when the vehicle is running at a medium and high speed.
Fig. 5 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the range extending mode. As shown in fig. 5, the power transmission direction is as shown by the arrow direction in the figure, in the range extending mode, the first clutch 141 is operated, the first clutch 141 is engaged with the engine 11 and the rotary axle 127, the second clutch 142 is not operated, the brake 151 or the one-way clutch is not operated, the engine 11 drives the first motor 13 to generate electricity, the first motor 13 supplies electricity to the second motor 17, and the second motor 17 drives. The engine 11 drives the first motor 13 via the ring gear 126, so that the first motor 13 rotates to generate electricity, and the electric energy generated by the first motor 13 is stored in the power battery and is provided for driving the second motor 17 by the power battery. In this embodiment, the power transmission has a path from the second motor 17 through the fourth gear 172 to the third gear 161, the intermediate shaft 16, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 may be driven in the range extended mode when the vehicle is running at full speed.
Fig. 6 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the engine-alone drive first-speed mode. As shown in fig. 6, the power transmission direction is as indicated by the arrow in the figure, in the engine-only drive first-speed mode, the first clutch 141 is operated, the brake 151 or the one-way clutch is operated, the first clutch 141 engages the engine 11 and the rotating axle 127, the brake 151 or the one-way clutch brakes the sun gear 121, the second clutch 142, the first motor 13, and the second motor 17 are not operated, and the engine 11 is driven. In this embodiment, the power transmission has a path from the engine 11 through the first clutch 141, the rotating axle 127, the ring gear 126, the planet gears 125, the planet carrier 124, the third gear 161 to the intermediate shaft 16, through the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 can be driven in the engine-only first gear mode when the vehicle is running at a medium-low speed.
Fig. 7 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the engine-alone driven second speed mode. As shown in fig. 7, the power transmission direction is as shown by the arrow direction in the figure, in the engine-only-drive second-speed mode, the first clutch 141 and the second clutch 142 are operated, the first clutch 141 engages the engine 11 and the rotary wheel shaft 127, the second clutch 142 locks the sun gear 121 and the ring gear 126 (the sun gear 121 and the ring gear 126 are locked together, the entire planetary gear device rotates integrally, and the speed ratio is 1), or the second clutch 142 locks the carrier 124 and the ring gear 126, the first motor 13, the second motor 17, and the brake 151 or the one-way clutch are not operated, and the engine 11 is driven. In this embodiment, the power transmission has a path, and the engine 11 is transmitted through the entire planetary gear arrangement to the intermediate shaft 16, through the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 can be driven in the engine-only driven second gear mode when the vehicle is running at medium to high speeds.
Fig. 8 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the one-stage hybrid mode. As shown in fig. 8, the power transmission direction is as indicated by the arrow in the drawing, and in the one-stage hybrid mode, the first clutch 141 is operated, the brake 151 or the one-way clutch is operated, the first clutch 141 engages the engine 11 and the rotary axle 127, the brake 151 or the one-way clutch brakes the sun gear 121, the second clutch 142 is not operated, and the engine 11, the first motor 13, and the second motor 17 are driven. In the present embodiment, the power transmission has three paths, wherein, in the first path, the engine 11 is transmitted to the intermediate shaft 16 through the rotating axle 127, the ring gear 126, the planet gear 125, the planet carrier 124, the third gear 161, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end; on the second path, the first electric machine 13 is transmitted to the intermediate shaft 16 through the ring gear 126, the planet gear 125 and the planet carrier 124, then passes through the third gear 161, the fifth gear 162, the differential gear 181, the differential 18 and finally reaches the wheel end; path three, the second motor 17 is transferred through the fourth gear 172 to the third gear 161, the intermediate shaft 16, the fifth gear 162, the differential gear 181, the differential 18 and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 can be driven in the engine-only first gear mode when the vehicle is running at a medium or low vehicle speed.
Fig. 9 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the two-stage hybrid mode. As shown in fig. 9, the power transmission direction is as indicated by the arrow in the figure, in the two-stage hybrid mode, the first clutch 141 and the second clutch 142 are operated, the first clutch 141 engages the engine 11 and the rotary wheel shaft 127, the second clutch 142 locks the sun gear 121 and the ring gear 126 (the sun gear 121 and the ring gear 126 are locked together, the entire planetary gear device rotates integrally, and the speed ratio is 1), or the second clutch 142 locks the carrier 124 and the ring gear 126, the brake 151 or the one-way clutch is not operated, and the engine 11, the first motor 13, and the second motor 17 are all driven. In the present embodiment, the power transmission has three paths, wherein, in the first path, the engine 11 is transmitted to the intermediate shaft 16 through the whole planetary gear device, and then to the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end; on the second path, the first motor 13 is transmitted to the intermediate shaft 16 through the whole planetary gear device, and then to the third gear 161, the fifth gear 162, the differential gear 181, the differential 18, and finally to the wheel end; path three, the second motor 17 is transferred through the fourth gear 172 to the third gear 161, the intermediate shaft 16, the fifth gear 162, the differential gear 181, the differential 18 and finally to the wheel end. It is worth mentioning that the hybrid drive system 10 may be driven in the engine-only drive second gear mode when the vehicle is running at medium to high vehicle speeds.
Fig. 10 is a power transmission diagram of the hybrid drive system of the first embodiment of the invention in the parking power generation mode. As shown in fig. 10, the power transmission direction is as indicated by the arrow in the drawing, in the parking power generation mode, the first clutch 141 is operated, the first clutch 141 engages the engine 11 and the rotary axle 127, the second clutch 142 and the brake 151 or the one-way clutch are not operated, and the power of the engine 11 is transmitted to the first motor 13 to generate power.
The hybrid power driving system 10 of the invention has a single-motor pure electric mode, a double-motor pure electric first gear mode, a double-motor pure electric second gear mode, a range extending mode, an engine single-drive first gear mode, an engine single-drive second gear mode, a primary hybrid mode, a secondary hybrid mode and a parking power generation mode, and can automatically realize the switching of different modes according to the SOC (residual electric quantity) value of a power battery and the vehicle speed requirement. For example, judging the magnitude relation between the SOC value of the power battery and a first threshold value, or simultaneously judging the magnitude relation between the SOC value of the power battery and the first threshold value and the magnitude relation between the vehicle speed and a second threshold value; the operation mode of the hybrid drive system 10 is switched according to the determination result. It should be noted that the first threshold is used to determine the SOC value of the power battery, and the second threshold is used to determine the vehicle speed, and the embodiment does not limit the value ranges of the first threshold and the second threshold, and may be freely set according to a specific control strategy, and the values of the first threshold and the second threshold are different under different control strategies. After the first threshold value and the second threshold value are set, automatic judgment is carried out, and automatic switching is carried out among various modes according to the judgment result.
The nine modes are embodied as the following table:
second embodiment
The hybrid drive system 10 of the present embodiment is substantially identical in structure to the hybrid drive system 10 of the first embodiment, and is different in the connection relationship between the engine 11 and the planetary gear device and the connection relationship between the clutch gear device and the planetary gear device.
Specifically, in the present embodiment, the first rotating element is the sun gear 121, the second rotating element is one of the ring gear 126 and the carrier 124, the third rotating element is the other of the ring gear 126 and the carrier 124, and the switching device is the brake 151 or the one-way clutch. For the connection relationship and the driving method of the components of the hybrid drive system 10, refer to the first embodiment.
Third embodiment
The hybrid drive system 10 of the present embodiment is substantially identical in structure to the hybrid drive system 10 of the first embodiment, and is different in the connection relationship between the engine 11 and the planetary gear device and the connection relationship between the clutch gear device and the planetary gear device.
Specifically, in the present embodiment, the first rotating element is the carrier 124, the second rotating element is one of the sun gear 121 and the ring gear 126, the third rotating element is the other of the sun gear 121 and the ring gear 126, and the switching device is the brake 151 or the one-way clutch. For the connection relationship and the driving method of the components of the hybrid drive system 10, refer to the first embodiment.
Fourth embodiment
Fig. 11 is a schematic configuration diagram of a hybrid drive system of a fourth embodiment of the invention. As shown in fig. 11, the hybrid drive system 10 of the present embodiment is substantially the same in structure as the hybrid drive system 10 of the first embodiment, and is different in the connection relationship between the first motor 13 and the planetary gear device.
Specifically, the first motor 13 has a first motor output shaft 131, a first gear 132 is disposed on the first motor output shaft 131, a second gear 123 is disposed on the rotating wheel shaft 127, and the first gear 132 and the second gear 123 are engaged with each other. In the present embodiment, the first motor 13 is a driving and power generating integrated machine.
An engine 11 and a first motor 13 of a hybrid drive system 10 of the present invention are both connected to a planetary gear device, and a clutch gear device is provided between the engine 11 and the first motor 13; the planetary gear device includes a first rotating element, a second rotating element, and a third rotating element having a rotating hub 127, the first motor 13 being connected to the third rotating element or the rotating hub 127; the clutch gear device includes a first clutch 141 and a second clutch 142, the first clutch 141 connecting the engine 11 and the rotary axle 127, the second clutch 142 connecting the first rotary element and the third rotary element, or the second clutch 142 connecting the second rotary element and the third rotary element; the switch device locks or unlocks the first rotating element; the second motor 17 is arranged in parallel with the first motor 13, and the second motor 17 is connected to the output terminal. The hybrid power driving system 10 of the invention can work in a single-motor pure electric mode, a double-motor pure electric first gear mode, a double-motor pure electric second gear mode, a range extending mode, an engine single-drive first gear mode, an engine single-drive second gear mode, a first-stage hybrid mode, a second-stage hybrid mode and a parking power generation mode, and has strong flexibility. Moreover, the engine 11 and the first motor 13 are connected through a planetary gear device, so that the speed ratio is adjustable, the speed ratio range is wide, and the size of the first motor 13 can be effectively reduced. In the hybrid drive system 10 of the present invention, the second electric motor 17 is driven when the mode is switched, and the power is not interrupted. The hybrid drive system 10 of the present invention can cover HEV vehicle types and PHEV vehicle types, and is well-platformized.
It is to be noted that the engine 11 of the hybrid drive system 10 of the invention is connected to the ring gear 126, and the ratio of the speed ratios of the two gear positions (step ratio of the gear positions) of the system is small, so that switching between the modes is easy.
The present invention is not limited to the specific details of the above-described embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (14)
1. A hybrid drive system, comprising:
the engine and the first motor are connected with the planetary gear device, and the clutch gear device is arranged between the engine and the first motor;
the planetary gear device comprises a first rotating element, a second rotating element and a third rotating element, the third rotating element has a rotating axle, and the first motor is connected with the third rotating element or the rotating axle;
the clutch gear device includes a first clutch that connects the engine and the rotating axle, and a second clutch that connects the first rotating element and the third rotating element, or the second clutch connects the second rotating element and the third rotating element;
the switch device locks or unlocks the first rotating element;
the second motor and the first motor are arranged in parallel, and the second motor is connected to an output end.
2. The hybrid drive system according to claim 1, wherein the second clutch includes a driving portion connected to the third rotating element and a driven portion connected to the first rotating element or the second rotating element; alternatively, the driven part is connected to the third rotating element, and the driving part is connected to the first rotating element or the second rotating element.
3. A hybrid drive system as defined in claim 1, wherein said engine, planetary gear arrangement and first electric machine are coaxially disposed.
4. A hybrid drive system as set forth in claim 1 wherein said first electric motor has a first motor output shaft with a first gear disposed thereon and a second gear disposed on said rotating axle, said first gear intermeshed with said second gear.
5. The hybrid drive system according to claim 1, wherein the first rotating element is a sun gear, the second rotating element is a carrier, the third rotating element is a ring gear, and the switching device is a brake or a one-way clutch;
the first motor is provided with a first motor output shaft, and the first motor output shaft is connected with the gear ring; the first clutch is operative to engage the engine and the rotating axle; the sun gear and the gear ring are locked when the second clutch works, or the planet carrier and the gear ring are locked when the second clutch works;
the brake or the one-way clutch brakes or unlocks the sun gear;
the hybrid power driving system further comprises an intermediate shaft, a third gear is arranged on the intermediate shaft, and the third gear is meshed with the planet carrier;
the second motor is provided with a second motor output shaft, a fourth gear is arranged on the second motor output shaft, and the fourth gear is meshed with the third gear.
6. A hybrid drive system as set forth in claim 5 further comprising a differential having a differential gear disposed thereon, and a fifth gear disposed on said countershaft and intermeshed with said differential gear.
7. The hybrid drive system of claim 5, wherein the hybrid drive system has a single motor electric-only mode, a dual motor electric-only first gear mode, a dual motor electric-only second gear mode, a range extended mode, an engine-only first gear mode, an engine-only second gear mode, a first-order hybrid mode, a second-order hybrid mode, and a park electric power generation mode.
8. The hybrid drive system of claim 7, wherein in the single-motor electric-only mode, none of the first clutch, the second clutch, the brake or one-way clutch, the engine, and the first electric machine are active, and the second electric machine is driving; in the dual-motor pure electric first-gear mode, the engine, the first clutch and the second clutch do not work, the brake or the one-way clutch works, the brake or the one-way clutch brakes the sun gear, and the first motor and the second motor are both driven; under the two-motor pure electric two-gear mode, the engine, first clutch is out of work, stopper or one-way clutch are out of work, the second clutch locks the sun gear with the ring gear, perhaps the second clutch locks the planet carrier with the ring gear, first motor with the second motor all drives.
9. The hybrid drive system of claim 7, wherein in the range extended mode, the first clutch is active, the first clutch engages the engine and the rotating axle, the second clutch is inactive, the brake or one-way clutch is inactive, the engine drives the first electric machine to generate electricity, the first electric machine provides electrical energy to the second electric machine, and the second electric machine drives.
10. The hybrid drive system according to claim 7, wherein in the engine-only drive first-speed mode, the first clutch is operated, the brake or one-way clutch is operated, the first clutch engages the engine and the rotating axle, the brake or one-way clutch brakes the sun gear, none of the second clutch, the first electric machine, and the second electric machine are operated, and the engine is driven; in the engine single-drive second-gear mode, the first clutch and the second clutch work, the first clutch is connected with the engine and the rotating wheel shaft, the second clutch locks the sun gear and the gear ring, or the second clutch locks the planet carrier and the gear ring, the first motor, the second motor and the brake or the one-way clutch do not work, and the engine drives.
11. The hybrid drive system according to claim 7, wherein in the one-stage hybrid mode, the first clutch is operated, the brake or one-way clutch is operated, the first clutch engages the engine and the rotating axle, the brake or one-way clutch brakes the sun gear, the second clutch is not operated, and the engine, the first motor, and the second motor are driven; in the two-stage hybrid mode, the first clutch and the second clutch operate, the first clutch engages with the engine and the rotating wheel shaft, the second clutch locks the sun gear and the gear ring, or the second clutch locks the planet carrier and the gear ring, the brake or the one-way clutch does not operate, and the engine, the first motor and the second motor are all driven.
12. The hybrid drive system according to claim 7, wherein in the parking power generation mode, the first clutch is operated, the first clutch engages the engine and the rotating axle, the second clutch and the brake or one-way clutch are not operated, and power of the engine is transmitted to the first motor to generate power.
13. The hybrid drive system according to claim 1, wherein the first rotating element is a sun gear, the second rotating element is one of a ring gear and a carrier, the third rotating element is the other of the ring gear and the carrier, and the switching device is a brake or a one-way clutch.
14. The hybrid drive system according to claim 1, wherein the first rotating element is a carrier, the second rotating element is one of a sun gear and a ring gear, the third rotating element is the other of the sun gear and the ring gear, and the switching device is a brake or a one-way clutch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963425.0A CN110857028A (en) | 2018-08-22 | 2018-08-22 | Hybrid power drive system |
| PCT/CN2019/101865 WO2020038422A1 (en) | 2018-08-22 | 2019-08-21 | Hybrid power drive system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810963425.0A CN110857028A (en) | 2018-08-22 | 2018-08-22 | Hybrid power drive system |
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| CN110857028A true CN110857028A (en) | 2020-03-03 |
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| CN201810963425.0A Pending CN110857028A (en) | 2018-08-22 | 2018-08-22 | Hybrid power drive system |
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| CN (1) | CN110857028A (en) |
| WO (1) | WO2020038422A1 (en) |
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