CN110978988B - Hybrid power DCT tractor and automatic gear shifting control method thereof - Google Patents
Hybrid power DCT tractor and automatic gear shifting control method thereof Download PDFInfo
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- CN110978988B CN110978988B CN202010038286.8A CN202010038286A CN110978988B CN 110978988 B CN110978988 B CN 110978988B CN 202010038286 A CN202010038286 A CN 202010038286A CN 110978988 B CN110978988 B CN 110978988B
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Classifications
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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
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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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- 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
- B60K6/42—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 the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
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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
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/54—Transmission for changing ratio
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/84—Data processing systems or methods, management, administration
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Transmission Device (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
A hybrid power DCT tractor and an automatic gear shifting control method thereof comprise a main input shaft for power input, a main output shaft for outputting power to a central transmission part, a power output shaft PTO for outputting power to a load, a double clutch automatic transmission, a speed reduction motor, a power coupling device, a central transmission part and a driving hub, wherein the main input shaft is connected to a crankshaft of an engine in a transmission way; the double clutch automatic transmission comprises a clutch shell in transmission connection with an output shaft of an engine, a clutch C1 for controlling heavy-load first gear, medium-load first gear and transport first gear, a clutch C2 for controlling heavy-load second gear, light-load second gear and transport second gear, a solid input shaft and a hollow input shaft; and gear selecting and shifting sets are arranged between corresponding sections of the input shaft and the output shaft of the clutch C1 and the clutch C2. The invention increases three driving operation modes, optimizes the working area of the engine, improves the energy utilization efficiency, and can realize the aims of energy saving and environmental protection operation of the tractor.
Description
Technical Field
The invention belongs to the technical field of tractors, and relates to a hybrid power DCT tractor and an automatic gear shifting control method thereof.
Background
At present, the technology of automatic transmissions is very rapid, and particularly the double clutch automatic transmission has very good development potential, the technology of the automatic transmission is mature, the problem of gear shifting power transmission interruption can be well solved, and the application of the automatic transmission is more and more extensive in recent years.
The double clutch automatic transmission comprises a main input shaft for connecting a power source, a double clutch in transmission connection with the main input shaft, an intermediate shaft and a main output shaft, wherein the double clutch comprises an input end, an odd-gear transmission shaft, an even-gear transmission shaft and a clutch mechanism for selecting the transmission connection of the input end and the odd-gear transmission shaft or the even-gear transmission shaft, wherein the input end, the odd-gear transmission shaft and the even-gear transmission shaft are coaxially connected with the main input shaft. The odd-gear transmission shaft, the even-gear transmission shaft and the corresponding sections of the intermediate shaft are respectively provided with a corresponding odd-gear synchronizer and a corresponding even-gear synchronizer, the odd-gear sets comprise idler gears which are rotationally assembled on shafts corresponding to the transmission torque of the odd-gear transmission shaft and the even-gear transmission shaft, and when the corresponding synchronizers act, one idler gear of the paired odd-gear sets or even-gear sets can be fixedly connected with the shaft to transmit the torque while the other idler gear continuously maintains the idler. Because one clutch in the double clutch corresponds to odd-numbered gears and the other clutch corresponds to even-numbered gears, when the vehicle is in one gear, the other clutch and the corresponding next gear are in a preparation state through the corresponding synchronizer, and the next gear can be immediately engaged as long as the current gear is separated, the gear selecting and shifting speed of the double clutch gearbox is very fast, and the problem of power transmission interruption can be well solved.
However, although the dual clutch automatic transmission in the prior art can better solve the problem of power transmission interruption, when the dual clutch automatic transmission is used on a tractor driven by a diesel engine, the power of the engine cannot be fully utilized due to the reasons of complex use condition, more gear requirements, larger pollution emission and the like of the tractor, so that serious energy waste and tail gas emission are caused. The hybrid power system tractor is added with the motor, so that the working area of the engine can be optimized, the energy utilization rate is improved, and the energy-saving and environment-friendly efficient method for the tractor is realized.
Disclosure of Invention
In view of the above, the present invention aims to solve the above-mentioned shortcomings of the prior art, and to provide a hybrid power DCT tractor and an automatic gear shifting control method thereof, which increase three driving operation modes, optimize the working area of an engine, improve the energy utilization efficiency, and achieve the goals of energy saving and environmental protection operation of the tractor by matching the mechanical transmission of the hybrid power double clutch automatic transmission with the motor.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a hybrid power DCT tractor comprises a shell, a main input shaft for power input, a main output shaft for outputting power to a central transmission part, a power output shaft PTO for outputting power to a load, a double clutch automatic transmission, a speed reduction motor, a power coupling device, a central transmission part and a driving hub, wherein the main input shaft is connected to a crankshaft of an engine in a transmission way;
the output end of the engine is coaxially connected with the input end of the double-clutch automatic transmission, two pairs of low-speed PTO gear pairs and high-speed PTO gear pairs for the operation of different rotational speed agricultural implements are arranged on the output shaft of the engine, the low-speed PTO gear pairs and the high-speed PTO gear pairs are coaxially connected with the power output shaft PTO, and the power output shaft PTO is connected with a power output shaft synchronizer positioned between the low-speed PTO gear pairs and the high-speed PTO gear pairs;
the double clutch automatic transmission comprises a clutch shell in transmission connection with an output shaft of an engine, a clutch C1 for controlling heavy-load first gear, medium-load first gear and transport first gear, a clutch C2 for controlling heavy-load second gear, light-load second gear and transport second gear, a solid input shaft and a hollow input shaft; the gear selecting and shifting gear sets are arranged between the corresponding sections of the input shafts and the output shafts of the clutch C1 and the clutch C2, a hollow shaft driving gear and a hollow shaft driven gear are correspondingly arranged on the hollow input shaft, the gear selecting and shifting gear sets on the hollow input shaft comprise a heavy-duty first gear pair, a medium-duty first gear pair and a transport first gear pair, and the gear selecting and shifting gear sets on the solid input shaft comprise a heavy-duty second gear pair, a medium-duty second gear pair and a transport second gear pair.
Furthermore, the heavy-duty first gear pair and the transport first gear pair are arranged in pairs, a heavy-duty first gear synchronizer and a transport first gear synchronizer which are used for selecting one gear pair to be connected with the output shaft and the other gear pair to keep the empty sleeve are arranged between the heavy-duty first gear pair and the transport first gear pair, the transport first gear pair and the middle-load first gear pair are arranged in pairs, a middle-load first gear synchronizer is arranged between the transport first gear pair and the middle-load first gear pair, the middle-load first gear pair is connected with the hollow shaft driven gear, the heavy-duty first gear pair is respectively connected with the transmission output shaft driving gear and the transmission output shaft driven gear, the transmission output shaft driving gear and the transmission output shaft driven gear are both connected to the central transmission part, and the central transmission part is connected with the driving hub.
Further, the middle-load second gear pair and the transporting second gear pair are arranged in pairs, a middle-load second gear synchronizer is arranged between the middle-load second gear pair and the transporting second gear pair, the transporting second gear pair and the heavy-load second gear pair are arranged in pairs, a transporting second gear synchronizer and a heavy-load second gear synchronizer are arranged between the transporting second gear pair and the heavy-load second gear pair, and the heavy-load second gear pair is connected with a power coupling device of a gear motor.
Further, the solid input shaft is in a solid shaft form, the hollow input shaft is in a hollow shaft sleeve form coaxially sleeved on the solid input shaft, the clutch C2 is used for controlling the solid input shaft to be connected, and the clutch C1 is used for controlling the hollow input shaft to be connected.
Further, the output end of the speed reducing motor is coaxially connected with the tail end of a solid input shaft of the double-clutch automatic transmission; the gear motor comprises an input shaft, an output shaft synchronously arranged on the same axis and a power coupling device arranged in an integrated manner.
Further, the power coupling device is a planetary gear type rotating speed coupling system, a sun gear of the power coupling device is connected with a solid input shaft of the double-clutch automatic transmission, an inner gear ring is connected with an output shaft of a speed reduction motor, and a planetary gear is connected with a heavy-load second-gear pair.
Further, the invention relates to an automatic gear shifting control method of a hybrid DCT tractor, which also comprises an automatic gear shifting control system, wherein the automatic gear shifting control system comprises an automatic gearbox control unit TCU, a sensor system, a signal processing part and an executing mechanism;
the automatic gear shifting control method comprises the following steps:
s1: when the power output shaft PTO of the tractor works, the automatic gearbox control unit TCU controls the power output shaft synchronizer to select a proper rotating speed gear by receiving an engine rotating speed signal and a PTO rotating speed signal, so that the PTO keeps constant rotating speed and outputs stable power;
s2: the automatic gearbox control unit TCU detects a driving operation mode required by the tractor, and the sensor system controls the opening and closing of the clutch C1 and the clutch C2 and simultaneously controls the starting and stopping of the gear motor by detecting the rotating speed of the solid input shaft or the hollow input shaft, and all synchronizers are engaged;
s3: the power transmission route is as follows: the engine transmits power to a high-speed PTO gear pair or a low-speed PTO gear pair through a main input shaft, a required rotating speed gear is selected through a power output shaft synchronizer, and then torque is transmitted to a power output shaft PTO, so that the power output shaft PTO can keep constant rotating speed and output stable power outwards; on the other hand, power is transmitted to the following double clutch automatic transmission through the output end, the double clutch automatic transmission outputs the same rotating speed with the gear of the corresponding gear selecting and shifting gear set to the power output shaft PTO through the clutch C1, the clutch C2, the corresponding gear selecting and shifting gear set and the synchronizer, and then the torque is transmitted to the central transmission part through the output gear pair on the power output shaft PTO, and finally the torque is transmitted to the driving hub of the tractor to drive the tractor to run under load.
Further, the sensor system includes a speed sensor, a pressure sensor, a temperature sensor, a position sensor, and is configured to detect vehicle speed, transmission input and output shaft speeds, pressure on the dual clutch, and status signals.
Further, the driving operation mode of the tractor in step S2 includes: a pure electric drive operation mode (EV), a hybrid drive operation mode, and an engine drive operation mode; the electric-only drive operation mode (EV) is: when the hybrid power double clutch automatic transmission tractor is in light load operation and the running speed is not high, the tractor is independently driven by a motor to run; the hybrid drive operation mode is: when the tractor works in a heavy load and medium load gear and the required power is high, the engine and the motor drive the tractor to run simultaneously; the engine driving operation mode is as follows: when the tractor works in a transportation gear and the required power is proper, the engine provides the additional generated power for the motor to charge the battery pack while providing the working power of the tractor.
The beneficial effects of the invention are as follows:
the torque transmitted by the engine is transmitted to the PTO gear selecting and shifting synchronizer through the high-speed and low-speed PTO gear pair on one hand through the crankshaft to be used as the load power output of the tractor; on the other hand, power is transmitted to the double clutch automatic transmission after the power is transmitted to the output end, the double clutch automatic transmission outputs the same rotating speed as the gear of the corresponding gear selecting and shifting gear set to the power output shaft PTO through the multi-plate clutch, the corresponding gear selecting and shifting gear set and the synchronizer, and then the torque is transmitted to the central transmission part through the output gear pair on the power output shaft PTO, and finally the torque is transmitted to the driving hub of the tractor to drive the tractor to run;
the hybrid DCT tractor of the present invention has three drive modes of operation, including an electric-only drive mode (EV), a hybrid drive mode of operation, and an engine drive mode of operation. The automatic gearbox control unit TCU can automatically switch the driving operation mode according to the operation working condition of the tractor; through the matching work of the mechanical transmission and the motor of the hybrid power double clutch automatic transmission, three driving operation modes are added, the working area of an engine is optimized, the energy utilization efficiency is improved, and the aims of energy saving and environment protection operation of the tractor can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic gear diagram of one embodiment of a dual clutch automatic transmission of the present invention;
FIG. 2 is a schematic diagram of the operation of the hybrid drive mode of operation;
FIG. 3 is a transmission schematic diagram of a pure electric operating mode (EV);
FIG. 4 is a schematic diagram of one transmission for a hybrid drive mode of operation;
FIG. 5 is a schematic diagram of one transmission of an engine-driven operating mode;
FIG. 6 is a schematic diagram of an automatic shift control relationship for a dual clutch automatic transmission;
the marks in the figure: 1. the transmission comprises an engine, 2, a low-speed PTO gear pair, 3, a high-speed PTO gear pair, 4, a clutch C2,5, a clutch C1,6, a hollow shaft driving gear, 7, a medium-load second gear pair, 8, a medium-load second gear synchronizer, 9, a transport second gear pair, 10, a transport second gear and heavy-load second gear synchronizer, 11, a heavy-load second gear pair, 12, a power coupling device, 13, a gear motor, 14, a transmission output shaft driving gear, 15, a driving wheel hub, 16, a central transmission part, 17, a transmission output shaft driven gear, 18, a heavy-load first gear pair, 19, a heavy-load first gear and transport first gear synchronizer, 20, a transport first gear pair, 21, a medium-load first gear synchronizer, 22, a medium-load first gear pair, 23, a hollow shaft driven gear, 24, a power PTO,25 and a power output shaft synchronizer.
Detailed Description
Specific examples are given below to further clarify, complete and detailed description of the technical scheme of the invention. The present embodiment is a preferred embodiment based on the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.
The hybrid DCT tractor comprises a shell, a main input shaft for power input, a main output shaft for power output to a central transmission part 16, a power output shaft PTO24 for power output by load, a double clutch automatic transmission, a gear motor 13, a power coupling device 12, the central transmission part 16 and a driving hub 15, wherein the main input shaft is connected to a crankshaft of an engine 1 in a transmission way;
the output end of the engine 1 is coaxially connected with the input end of the double-clutch automatic transmission, two pairs of low-speed PTO gear pairs 2 and high-speed PTO gear pairs 3 for the operation of different rotational speed agricultural implements are arranged on the output shaft of the engine 1, the low-speed PTO gear pairs 2 and the high-speed PTO gear pairs 3 are coaxially connected with the power output shaft PTO24, and the power output shaft PTO24 is connected with a power output shaft synchronizer 25 positioned between the low-speed PTO gear pairs 2 and the high-speed PTO gear pairs 3;
the double clutch automatic transmission comprises a clutch shell in transmission connection with an output shaft of an engine 1, a clutch C1 5 for controlling heavy-load first gear, medium-load first gear and transport first gear, a clutch C2 4 for controlling heavy-load second gear, light-load second gear and transport second gear, a solid input shaft and a hollow input shaft; as shown in fig. 1, gear selecting and shifting gear sets are respectively arranged between corresponding sections of the input shafts and the output shafts of the clutches C1 5 and C2 4, a hollow shaft driving gear 6 and a hollow shaft driven gear 23 are correspondingly arranged on the hollow input shaft, the gear selecting and shifting gear sets on the hollow input shaft comprise a heavy-duty first gear pair 18, a medium-duty first gear pair 22 and a transport first gear pair 20, and the gear selecting and shifting gear sets on the solid input shaft comprise a heavy-duty second gear pair 11, a medium-duty second gear pair 7 and a transport second gear pair 9. Further, each gear of the gear selecting and shifting gear set is sequentially arranged from big to small according to the transmission: a heavy-load first gear, a heavy-load second gear, a medium-load first gear, a medium-load second gear, a light-load gear, a first transportation first gear and a second transportation second gear; further, idler gears in the gear selecting and shifting gear sets are adjacently arranged in pairs according to set gear selecting and shifting gears in a one-to-one correspondence; and a synchronizer for selecting one idler gear of the pair to be fixedly connected with the shaft and the other idler gear to keep idling is arranged between the two idler gears of the pair.
Further, clutch C1 5 controls engagement of the heavy-duty first gear, the medium-duty first gear, and the transport first gear, and clutch C2 4 controls engagement of the heavy-duty second gear, the light-duty second gear, and the transport second gear. Further, the dual clutch automatic transmission is two sets of multi-plate clutches coaxially installed together and installed in a closed oil chamber filled with hydraulic oil, and the structure has better adjustment capability and excellent hot melt property and can transmit relatively large torque.
Further, the heavy duty first gear pair 18 and the transporting first gear pair 20 are arranged in pairs, a heavy duty first gear and transporting first gear synchronizer 19 for selecting one gear pair to be connected with the output shaft and the other gear pair to keep empty is arranged between the heavy duty first gear pair and the transporting first gear pair 20, the transporting first gear pair 20 and the middle loading first gear pair 22 are arranged in pairs, a middle loading first gear synchronizer 21 is arranged between the transporting first gear pair 20 and the middle loading first gear pair 22, the middle loading first gear pair 22 is connected with a hollow shaft driven gear 23, the heavy duty first gear pair 18 is respectively connected with a transmission output shaft driving gear 14 and a transmission output shaft driven gear 17, the transmission output shaft driving gear 14 and the transmission output shaft driven gear 17 are both connected to a central transmission part 16, and the central transmission part 16 is connected with a driving hub 15.
Further, the middle-load second gear pair 7 and the transporting second gear pair 9 are arranged in pairs, a middle-load second gear synchronizer 8 is arranged between the middle-load second gear pair and the transporting second gear pair, the transporting second gear pair 9 and the heavy-load second gear pair 11 are arranged in pairs, a transporting second gear and heavy-load second gear synchronizer 10 is arranged between the transporting second gear pair 9 and the heavy-load second gear pair, and the heavy-load second gear pair 11 is connected with a power coupling device 12 of a gear motor 13.
Further, the solid input shaft is in the form of a solid shaft, the hollow input shaft is in the form of a hollow shaft sleeve coaxially sleeved on the solid input shaft, the clutch C2 4 is used for controlling the engagement of the solid input shaft, and the clutch C1 5 is used for controlling the engagement of the hollow input shaft.
Further, the output end of the speed reducing motor 13 is coaxially connected with the tail end of a solid input shaft of the double clutch automatic transmission; the gear motor 13 comprises an input shaft, an output shaft synchronously arranged on the same axis and a power coupling device 12 integrally arranged inside.
Further, the power coupling device 12 is a planetary gear type rotational speed coupling system, a sun gear of the planetary gear type rotational speed coupling system is connected with a solid input shaft of the double clutch automatic transmission, an inner gear ring is connected with an output shaft of the speed reduction motor 13, and a planetary gear is connected with the heavy-duty second gear pair 11.
The invention relates to an automatic gear shifting control method of a hybrid power DCT tractor, which also comprises an automatic gear shifting control system, wherein the automatic gear shifting control system comprises an automatic gearbox control unit TCU, a sensor system, a signal processing part and an executing mechanism; further, the sensor system is used for detecting a sensor of the rotation speed of the power output shaft PTO24 and a sensor of the rotation speed of the engine crankshaft; the automatic gearbox control unit TCU is used for acquiring the rotation speed information of the rotation speed sensor and controlling the rotation speed of the power output shaft PTO24 according to the rotation speed information, the signal output end of the rotation speed sensor is connected with the signal input end of the automatic gearbox control unit TCU, and the automatic gearbox control unit TCU is in control connection with the hydraulic control system of the tractor; the automatic gearbox control unit TCU is used for receiving the vehicle running state information detected by the sensor system and the intervention information given by the driver, comparing and calculating, then sending out a control command according to a set rule, and controlling the transmission to work through a corresponding executing mechanism; the gearbox electronic control unit TCU can automatically switch the driving operation mode according to the operation working condition of the tractor; the sensor system is used for testing the running state of the vehicle, converting the mechanical quantity of the running state information of the vehicle into an electric signal and providing a reference basis for gear shifting time; the actuating mechanism comprises a gear shifting electromagnetic valve and a pressure regulating electromagnetic valve and is used for receiving a control command of the automatic gearbox control unit TCU and then carrying out automatic gear switching and oil pressure regulation on the double clutch;
the automatic gear shifting control method comprises the following steps:
s1: when the tractor load power output shaft PTO24 works, the automatic gearbox control unit TCU controls the power output shaft synchronizer 25 to select a proper rotating speed gear by receiving the rotating speed signal of the engine 1 and the rotating speed signal of the PTO, so that the PTO keeps constant rotating speed and outputs stable power;
s2: the automatic gearbox control unit TCU detects a driving operation mode required by the tractor, the sensor system controls the opening and closing of the clutch C1 5 and the clutch C2 4 by detecting the rotating speed of the solid input shaft or the hollow input shaft, and simultaneously controls the starting and stopping of the gear motor 13, and all synchronizers are engaged;
s3: the power transmission route is as follows: the engine 1 transmits power to the high-speed PTO gear pair 3 or the low-speed PTO gear pair 2 through the main input shaft, a required rotating speed gear is selected through the power output shaft synchronizer 25, and then torque is transmitted to the power output shaft PTO24, so that the power output shaft PTO24 can keep constant rotating speed and output stable power outwards; on the other hand, power is transmitted to the following double clutch automatic transmission through the output end, the double clutch automatic transmission outputs the same rotation speed as the gear of the corresponding gear selecting and shifting gear set to the power output shaft PTO through the clutch C1 5, the clutch C2 4, the corresponding gear selecting and shifting gear set and the synchronizer, and then the torque is transmitted to the central transmission part 16 through the output gear pair on the power output shaft PTO, and finally the torque is transmitted to the driving hub 15 of the tractor to drive the tractor to run under load.
Further, the sensor system includes a speed sensor, a pressure sensor, a temperature sensor, a position sensor, and is configured to detect vehicle speed, transmission input and output shaft speeds, pressure on the dual clutch, and status signals.
Further, the driving operation mode of the tractor in step S2 includes: a pure electric drive operation mode (EV), a hybrid drive operation mode, and an engine drive operation mode; the gearbox electronic control unit TCU can automatically switch the driving operation mode according to the operation working condition of the tractor; the electric-only drive operation mode (EV) is: when the hybrid power double clutch automatic transmission tractor is in light load operation and the running speed is not high, the tractor is independently driven by a motor to run; the hybrid drive operation mode is: when the tractor works in heavy load and medium load gear and the required power is high, the engine 1 and the motor drive the tractor to run simultaneously; the engine driving operation mode is as follows: when the tractor is operating in a transport range and the required power is appropriate, the engine 1 provides additional generated power for the motor to charge the battery pack while providing the tractor operating power.
When the tractor works, the torque transmission routes of the gears of the double clutch automatic transmission are similar, and the transmission principles are the same. The following specifically describes the states of various components and power transmission paths in three driving modes of a hybrid DCT tractor, and the rest of the gears and so on, which are not specifically described and are within the scope of the present invention:
as shown in fig. 3, the electric-only drive operation mode (EV): the gearbox electronic control unit TCU detects that the tractor needs light-load gear operation, the sensor system detects the rotation speed of the solid input shaft,
the clutch C2 4 of the solid input shaft and the clutch C1 5 of the hollow input shaft are controlled to be disconnected, the gear motor 13 is started, and the transporting second gear and heavy load second gear synchronizer 10 is engaged on the right side according to the drawing. The power transmission route is as follows: on the one hand, the torque transmitted by the engine 1 is transmitted to a power output shaft synchronizer 25 through a low-speed PTO gear pair 2 on the output shaft of the engine 1, and finally is output as load power of the tractor through a power output shaft PTO 24; on the other hand, electric energy is transmitted to the gear motor 13 through the storage battery and the inverter, driving force is transmitted to the heavy-duty second gear pair 11 through the power coupling device 12 from the gear motor 13, then transmitted to the transmission output shaft driving gear 14 through the main output shaft of the double clutch automatic transmission, power is transmitted to the central transmission part 16 through the transmission output shaft driven gear 17, and finally power is distributed to the driving hub 15 through the internal gear mechanism of the central transmission part 16, so that the tractor is driven to travel forward.
As shown in fig. 2 and 4, the hybrid drive operation mode: the automatic gearbox control unit TCU detects that the tractor needs heavy load gear operation, and the sensor system controls the clutch C1 5 of the hollow input shaft to be engaged by detecting the rotating speed of the hollow input shaft, the heavy load first gear and transport first gear synchronizer 19 is engaged according to the right side of the figure, and meanwhile, the gear motor 13 is started, and the transport second gear and heavy load second gear synchronizer 10 is engaged according to the right side of the figure. The power transmission route is as follows: on the one hand, the torque transmitted by the engine 1 is transmitted to a power output shaft synchronizer 25 through a low-speed PTO gear pair 2 on an engine output shaft, and finally is output as load power of a tractor through a power output shaft PTO 24; on the other hand, the torque transmitted from the engine 1 is transmitted to the clutch C1 5 of the hollow input shaft via the engine input shaft, and then transmitted to the heavy duty first gear pair 18 via the hollow shaft driving gear 6 and the hollow shaft driven gear 23 on the hollow input shaft. At this time, the electric energy is transmitted to the gear motor 13 through the accumulator, through the inverter, the driving force is transmitted from the gear motor 13 to the heavy-duty second gear pair 11 through the power coupling device 12, after the power coupling is performed at the driven gear in the heavy-duty first gear pair 18, the electric energy is transmitted to the transmission output shaft driving gear 14 through the transmission main output shaft, the power is transmitted to the central transmission part 16 through the transmission output shaft driven gear 17, and finally the power is distributed to the driving hub 15 through the internal gear mechanism of the central transmission part 16, so that the tractor is driven to travel forward.
As shown in fig. 5, the engine-driven operation mode: the automatic transmission control unit TCU detects that the tractor needs to carry out gear operation, and the sensor system controls the engagement of the clutch C2 4 of the solid input shaft by detecting the rotation speed of the solid input shaft, and the carrying second gear and heavy load second gear synchronizer 10 is engaged according to the left side of the figure. The power transmission route is as follows: on the one hand, the torque transmitted by the engine 1 is transmitted to a power output shaft synchronizer 25 through a high-speed PTO gear pair 3 on an engine output shaft, and finally is output as load power of a tractor through a power output shaft PTO 24; on the other hand, the torque transmitted from the engine 1 is transmitted to the solid input shaft clutch C2 4 through the engine input shaft, then transmitted to the transmission main output shaft through the transmission second gear pair 9 on the solid input shaft, then transmitted to the central transmission part 16 through the transmission output shaft driving gear 14 and the transmission output shaft driven gear 17, and finally distributed to the driving hub 15 through the internal gear mechanism of the central transmission part 16, thereby driving the tractor to travel forward.
When the tractor operates in a certain drive mode load gear, the automatic gear shifting specific control method of the double clutch automatic transmission includes the following four parts, as shown in fig. 6:
1. an automatic transmission control unit TCU, which is the control center of the entire transmission system. The automatic transmission is arranged on a box body of the double clutch automatic transmission, information transmitted by sensors in the transmission is collected in real time, the information is communicated with an engine, an ABS, an instrument and other electronic control units through a CAN bus, the obtained state information is compared with an automatic gear shifting curve, and a gear shifting mechanism and a clutch operating mechanism are controlled according to a selected control strategy, so that gear shifting operation is carried out at a set gear shifting point. The automatic gearbox control unit TCU compares the parameters acquired by the sensor with the gear shifting target parameters, and continuously sends out control commands to adjust until the gear shifting action is completed;
2. a sensor system that monitors primarily the control parameters of the dual clutch automatic transmission. The sensor system includes a speed sensor, pressure sensor, temperature sensor, position sensor, etc. for detecting vehicle speed, transmission input and output shaft speeds, pressure on the dual clutch, and other status signals. The rotating speed sensor is used for monitoring the rotating speeds of the input shaft and the output shaft of the transmission and the rotating speed of the input shaft of the double clutch; the pressure sensor mainly detects the oil pressure on the double clutch; the temperature sensor and the displacement sensor respectively measure the temperature of engine oil and the displacement and gear information of the gear shifting lever;
the sensor system further comprises a rotation speed sensor, and the rotation speed sensor monitoring object comprises a transmission input rotation speed, a clutch input shaft rotation speed and a transmission output rotation speed. The sensors for monitoring the rotation speeds of the input shaft and the output shaft of the transmission are arranged on the outer edges of the transmission shell and the double clutch, and other rotation speed sensors are integrated on the electronic control device;
the sensor system also includes two pressure sensors located on the electro-hydraulic unit that monitor the pressure on the multiplate clutches C1 5 and C2 4, respectively. The two pressure sensors feed back the monitored pressure information to the automatic transmission control unit TCU. The automatic gearbox control unit TCU adjusts the pressure value on the multi-plate clutch according to feedback, so that the engagement and disengagement of the clutch are more accurate;
the sensor monitoring system further comprises a position sensor, including a gear adjustment sensor, a gear lever position sensor and a sensor for identifying manual and automatic gear shifting. Each shifting fork is provided with a gear adjusting displacement sensor for monitoring, signals are fed back to the automatic gearbox control unit TCU, and the oil pressure acting on the shifting fork is adjusted according to the accurate position, so that accurate shifting is finally realized;
3. the signal processing part, the input signal of the system includes analog quantity, pulse quantity and digital quantity. The analog signals include throttle opening, gearbox oil temperature, oil pressure, etc. The analog signals are converted into digital signals after sampling and A/D conversion, and the digital signals enter a central processing unit for processing. Pulse signals such as input and output rotating speed of the gearbox, rotating speed of an input shaft of the clutch and the like are shaped, and the number of pulses is recorded by a counter to collect the rotating speed signals;
4. the actuating mechanism comprises a clutch pressure regulating valve and a gear regulating electromagnetic valve. The clutch pressure regulating valve is respectively responsible for controlling the pressure on the multi-plate clutches C1 and C2, and the electronic control unit adjusts the pressure on the clutches C1 and C2 according to the feedback moment of the pressure sensor so as to be matched with the current situation; the gear adjusting electromagnetic valve controls the engine oil pressure leading to the shifting fork through the multi-way switching valve, and the shifting fork moves under the action of oil pressure and drives the synchronizer to select corresponding gears.
In summary, the general working principle of the whole of the present invention is as follows: the torque transmitted by the engine is transmitted to the PTO gear selecting and shifting synchronizer through the high-speed and low-speed PTO gear pair on one hand through the crankshaft to be used as the load power output of the tractor; on the other hand, power is transmitted to the double clutch automatic transmission after the power is transmitted to the output end, the double clutch automatic transmission outputs the same rotating speed as the gear of the corresponding gear selecting and shifting gear set to the power output shaft PTO through the multi-plate clutch, the corresponding gear selecting and shifting gear set and the synchronizer, and then the torque is transmitted to the central transmission part through the output gear pair on the power output shaft PTO, and finally the torque is transmitted to the driving hub of the tractor to drive the tractor to run;
in addition, the hybrid DCT tractor of the present invention has three driving modes of operation, including an electric-only driving mode (EV), a hybrid driving mode of operation, and an engine driving mode of operation. The automatic gearbox control unit TCU can automatically switch the driving operation mode according to the operation working condition of the tractor; through the matching work of the mechanical transmission and the motor of the hybrid power double clutch automatic transmission, three driving operation modes are added, the working area of an engine is optimized, the energy utilization efficiency is improved, and the aims of energy saving and environment protection operation of the tractor can be achieved.
The foregoing has outlined and described the features, principles, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are merely illustrative of the principles of the present invention, and that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An automatic gear shifting control method of a hybrid power DCT tractor is suitable for the hybrid power DCT tractor, and is characterized in that:
the tractor comprises a shell, and further comprises a main input shaft for power input, a main output shaft for outputting power to a central transmission part (16), a power output shaft PTO (24) for outputting power to a load, a double-clutch automatic transmission, a gear motor (13), a power coupling device (12), the central transmission part (16) and a driving hub (15), wherein the main input shaft is in transmission connection with a crankshaft of an engine (1); the output end of the engine (1) is coaxially connected with the input end of the double-clutch automatic transmission, two pairs of low-speed PTO gear pairs (2) and high-speed PTO gear pairs (3) for different rotational speed agricultural implement operation are arranged on the output shaft of the engine (1), the low-speed PTO gear pairs (2) and the high-speed PTO gear pairs (3) are coaxially connected with the power output shaft PTO (24), and the power output shaft PTO (24) is connected with a power output shaft synchronizer (25) positioned between the low-speed PTO gear pairs (2) and the high-speed PTO gear pairs (3); the double clutch automatic transmission comprises a clutch shell in transmission connection with an output shaft of an engine (1), a clutch C1 (5) for controlling heavy-load first gear, medium-load first gear and transport first gear, a clutch C2 (4) for controlling heavy-load second gear, light-load second gear and transport second gear, a solid input shaft and a hollow input shaft; a gear selecting and shifting gear set is arranged between the corresponding sections of the input shaft and the output shaft of the clutch C1 (5) and the clutch C2 (4), a hollow shaft driving gear (6) and a hollow shaft driven gear (23) are correspondingly arranged on the hollow input shaft, the gear selecting and shifting gear set on the hollow input shaft comprises a heavy-duty first-gear pair (18), a medium-duty first-gear pair (22) and a transport first-gear pair (20), and the gear selecting and shifting gear set on the solid input shaft comprises a heavy-duty second-gear pair (11), a medium-duty second-gear pair (7) and a transport second-gear pair (9);
the tractor further comprises an automatic gear shifting control system, wherein the automatic gear shifting control system comprises an automatic gearbox control unit TCU, a sensor system, a signal processing part and an executing mechanism;
the automatic gear shifting control method comprises the following steps:
s1: when a power output shaft PTO (24) of a tractor works, an automatic gearbox control unit TCU controls a power output shaft synchronizer (25) to select a proper rotating speed gear by receiving a rotating speed signal of an engine (1) and a rotating speed signal of the PTO, so that the PTO keeps constant rotating speed and outputs stable power;
s2: the automatic gearbox control unit TCU detects a driving operation mode required by the tractor, the sensor system controls the disconnection of the clutch C1 (5) and the clutch C2 (4) by detecting the rotating speed of the solid input shaft or the hollow input shaft, and simultaneously controls the start and stop of the gear motor (13), and each synchronizer is connected;
s3: the power transmission route is as follows: the engine (1) transmits power to the high-speed PTO gear pair (3) or the low-speed PTO gear pair (2) through the main input shaft, a required rotating speed gear is selected through the power output shaft synchronizer (25), and then torque is transmitted to the power output shaft PTO (24), so that the power output shaft PTO (24) can keep constant rotating speed and output stable power outwards; on the other hand, power is transmitted to the following double clutch automatic transmission through the output end, the double clutch automatic transmission outputs the same rotating speed with the gear of the corresponding gear selecting and shifting gear set to the power output shaft PTO through the clutch C1 (5), the clutch C2 (4), the corresponding gear selecting and shifting gear set and the synchronizer, and then the torque is transmitted to the central transmission part (16) through the output gear pair on the power output shaft PTO, and finally the torque is transmitted to the driving hub (15) of the tractor to drive the tractor load to run.
2. The automatic shift control method of a hybrid DCT tractor according to claim 1, characterized by: the heavy-duty first gear pair (18) and the transport first gear pair (20) are arranged in pairs, a heavy-duty first gear synchronizer (19) for selecting one gear pair to be connected with the output shaft and the other gear pair to keep empty is arranged between the heavy-duty first gear pair and the transport first gear pair, the transport first gear pair (20) and the medium-duty first gear pair (22) are arranged in pairs, a medium-duty first gear synchronizer (21) is arranged between the transport first gear pair and the medium-duty first gear pair, the medium-duty first gear pair (22) is connected with the hollow shaft driven gear (23), the heavy-duty first gear pair (18) is respectively connected with the transmission output shaft driving gear (14) and the transmission output shaft driven gear (17), the transmission output shaft driving gear (14) and the transmission output shaft driven gear (17) are both connected to the central transmission part (16), and the central transmission part (16) is connected with the driving hub (15).
3. The automatic shift control method of a hybrid DCT tractor according to claim 1, characterized by: the two gear pairs (7) of well carrying and transporting are arranged in pairs with the two gear pairs (9) of well carrying and are equipped with two gear synchronizers (8) of well carrying between the two, two gear pairs (9) of transporting are arranged in pairs with the two gear pairs (11) of heavy duty and are equipped with two gear synchronizers (10) of transporting and heavy duty between the two, two gear pairs (11) of heavy duty link to each other with power coupling device (12) of gear motor (13).
4. The automatic shift control method of a hybrid DCT tractor according to claim 1, characterized by: the solid input shaft is in a solid shaft form, the hollow input shaft is in a hollow shaft sleeve form coaxially sleeved on the solid input shaft, the clutch C2 (4) is used for controlling the solid input shaft to be connected, and the clutch C1 (5) is used for controlling the hollow input shaft to be connected.
5. The automatic shift control method of a hybrid DCT tractor according to claim 1, characterized by: the output end of the speed reducing motor (13) is coaxially connected with the tail end of a solid input shaft of the double-clutch automatic transmission; the gear motor (13) comprises an input shaft, an output shaft synchronously arranged on the same axis and a power coupling device (12) arranged in an integrated manner.
6. The automatic shift control method of a hybrid DCT tractor according to claim 5, characterized by: the power coupling device (12) is a planetary gear type rotating speed coupling system, a sun gear of the power coupling device is connected with a solid input shaft of the double-clutch automatic transmission, an inner gear ring is connected with an output shaft of a speed reduction motor (13), and a planetary gear is connected with a heavy-load second-gear pair (11).
7. The automatic shift control method of a hybrid DCT tractor according to claim 1, characterized by: the sensor system comprises a rotation speed sensor, a pressure sensor, a temperature sensor and a position sensor, and is used for detecting the speed of the vehicle, the rotation speed of an input shaft and an output shaft of the transmission, the pressure on the double clutch and state signals.
8. The automatic shift control method of a hybrid DCT tractor according to claim 1, characterized by: the driving operation mode of the tractor in the step S2 includes: a pure electric drive operation mode (EV), a hybrid drive operation mode, and an engine drive operation mode; the electric-only drive operation mode (EV) is: when the hybrid power double clutch automatic transmission tractor is in light load operation and the running speed is not high, the tractor is independently driven by a motor to run; the hybrid drive operation mode is: when the tractor works in heavy load and medium load gear and the required power is high, the engine (1) and the motor drive the tractor to run simultaneously; the engine driving operation mode is as follows: when the tractor works in a transportation gear and the required power is proper, the engine (1) provides additional generated power for the motor to charge the battery pack while providing the working power of the tractor.
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| CN111779814A (en) * | 2020-07-22 | 2020-10-16 | 河南科技大学 | Hydraulic mechanical power gear shifting transmission suitable for high-horsepower tractor |
| CN112487634B (en) * | 2020-11-25 | 2022-12-30 | 上汽通用五菱汽车股份有限公司 | Point selection method for gear shifting impulse calculation |
| CN113202907A (en) * | 2021-06-15 | 2021-08-03 | 嘉兴鲁棒实特车辆智能科技有限公司 | Gearbox and gear shifting method |
| CN113417976B (en) * | 2021-07-20 | 2024-06-25 | 山东农富传动科技有限公司 | Novel automatic gear shifting speed change assembly |
| CN114228470B (en) * | 2021-12-07 | 2024-02-02 | 周旭亮 | Power transmission system for hybrid electric vehicle and vehicle |
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| DE102010030571A1 (en) * | 2010-06-28 | 2011-12-29 | Zf Friedrichshafen Ag | Automated manual transmission for combustion engine of e.g. city bus, has transmission input shaft forming immediate torque-proof connection between fixed wheel of wheel set plane, electrical machine or starting element |
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| DE102013223356A1 (en) * | 2013-11-15 | 2015-05-21 | Zf Friedrichshafen Ag | Device for a drive train of a hybrid vehicle |
| DE102015114054A1 (en) * | 2015-06-18 | 2016-12-22 | Hyundai Motor Company | Transmission for a vehicle |
| CN109764117A (en) * | 2018-11-10 | 2019-05-17 | 浙江海天机械有限公司 | A kind of tractor dynamic power shift clutch assembly |
| CN110360311A (en) * | 2019-08-23 | 2019-10-22 | 河南科技大学 | Tractor hydraulic mechanical type double-clutch automatic gearbox and control method |
| CN110500402A (en) * | 2019-09-24 | 2019-11-26 | 黄敏丽 | The self shifter transmission system of the uninterrupted power-assisted of single motor power |
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