CN113085529A - Hybrid power system of working machine and working machine - Google Patents

Hybrid power system of working machine and working machine Download PDF

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Publication number
CN113085529A
CN113085529A CN202110480218.1A CN202110480218A CN113085529A CN 113085529 A CN113085529 A CN 113085529A CN 202110480218 A CN202110480218 A CN 202110480218A CN 113085529 A CN113085529 A CN 113085529A
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China
Prior art keywords
power
motor
engine
hybrid
switching device
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CN202110480218.1A
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Chinese (zh)
Inventor
陈添明
唐涛
黄运明
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Sany Automobile Manufacturing Co Ltd
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Sany Automobile Manufacturing Co Ltd
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Priority to CN202110480218.1A priority Critical patent/CN113085529A/en
Publication of CN113085529A publication Critical patent/CN113085529A/en
Pending legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention provides a hybrid power system of a working machine and a working machine, the hybrid power system including: the power switching device comprises an input end, a first output end and a second output end, and the first output end and the second output end are selectively jointed with the input end of the power switching device; the power source comprises an engine and a motor connected with the engine, and the output end of the power source is in power coupling connection with the input end of the power switching device; the driving shaft is in power coupling connection with the first output end and is used for driving the chassis to run; and the hydraulic pump is in power coupling connection with the second output end. According to the hybrid power system, the motor is connected with the engine, so that hybrid power output can be conveniently realized, and switching of various power modes can be conveniently realized through switching of the power switching device, so that the working machine can work in various modes according to requirements, and the energy efficiency is high in various modes.

Description

Hybrid power system of working machine and working machine
Technical Field
The invention relates to the technical field of working machines, in particular to a hybrid power system of a working machine and the working machine.
Background
The traditional operation machinery mostly adopts a diesel engine to output traction power and operation driving force, and operation electromotion becomes an important development trend in order to realize energy conservation and emission reduction. In the prior art, for an electric operation machine, on one hand, an engine is required to generate electricity for a motor, so that the energy efficiency is low; on the other hand, for traction power or for work driving force, only one power is often selected during a certain work, which limits the maximum load of the entire vehicle.
Disclosure of Invention
The invention provides a hybrid power system of a working machine and the working machine, which are used for overcoming the defect that an electric working machine in the prior art is low in energy efficiency or weak in power, switching of multiple power modes is realized, and the energy efficiency is high in all the modes.
The present invention provides a hybrid system for a working machine, including:
a power switching device including an input, a first output, and a second output, both of which are selectively engageable with the input of the power switching device;
the power source comprises an engine and a motor connected with the engine, and the output end of the power source is in power coupling connection with the input end of the power switching device;
the driving shaft is in power coupling connection with the first output end and is used for driving a chassis to run;
the hydraulic pump is in power coupling connection with the second output end.
According to the present invention, there is provided a hybrid system for a working machine, further comprising:
an energy storage device;
and the controller comprises a control circuit and a DC/AC converter, the control circuit is electrically connected with the engine and the energy storage device, and two ends of the DC/AC converter are respectively electrically connected with the energy storage device and the motor.
According to a hybrid system of a working machine provided by the present invention, the hybrid system has a hybrid mode;
in the hybrid mode, the controller is set to control the engine to work, the energy storage device supplies power to the motor and the motor works in the electric mode, and the input end of the power switching device is in power coupling connection with the first output end or the second output end.
According to the hybrid power system of the working machine, the motor has a power generation mode, and the hybrid power system has a recovery mode;
in the recovery mode, the motor works in a power generation mode, and the input end of the power switching device is in power coupling connection with the first output end or the second output end.
According to the present invention, there is provided a hybrid system for a working machine, further comprising:
the plug connector is used for being electrically connected with an external power supply;
the controller further comprises an AC/DC converter and an AC/AC converter, two ends of the AC/DC converter are respectively and electrically connected with the plug connector and the energy storage device, and two ends of the AC/AC converter are respectively and electrically connected with the plug connector and the motor.
According to a hybrid system of a working machine according to the present invention, the hybrid system has a second hybrid operation mode;
in the second hybrid operation mode, the controller is set to control the engine to work, the plug connector supplies power to the motor, the motor works in an electric mode, and the input end of the power switching device is in power coupling connection with the second output end.
According to the hybrid power system of a working machine provided by the present invention, the control circuit is electrically connected to the hydraulic pump, and the controller is configured to control the operation of the engine when the control circuit determines that the power of the hydraulic pump is greater than the rated power of the electric motor while the electric motor is operating and the engine is stopped.
According to the hybrid power system of the working machine, the power source further comprises a transmission, the output end of the engine is in power coupling connection with the input end of the transmission, and the output end of the transmission is coaxially connected with the motor.
According to the hybrid power system of the working machine, the motor has a power generation mode, and the hybrid power system has a charging mode; in the charging mode, the controller is configured to control the engine and the electric machine to operate simultaneously and the electric machine to operate in a generating mode, and the transmission is shifted to neutral.
According to the hybrid power system of the working machine, the power source further comprises a transmission, the output end of the engine is coaxially arranged with the motor, the output end of the motor is in power coupling connection with the input end of the transmission, and the output end of the transmission is in power coupling connection with the input end of the power switching device.
According to the hybrid power system of a working machine provided by the present invention, the power source further includes a transmission, and the motor is mounted on the transmission.
According to the hybrid power system of the working machine provided by the invention, the hydraulic pump comprises at least one of a main oil pump, a gear pump and a boom pump.
According to a hybrid power system of a working machine provided by the present invention, the power switching device includes a transfer case or a power take-off.
The present invention also provides a working machine including the hybrid system of any one of the working machines described above.
According to the hybrid power system of the working machine and the working machine, the motor is connected with the engine, so that hybrid power output can be conveniently realized, and switching of various power modes can be conveniently realized through switching of the power switching device, so that the working machine can work in various modes according to requirements, and the energy efficiency is high in various modes.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic illustration of a hybrid powertrain for a work machine according to the present disclosure;
fig. 2 is a second schematic structural diagram of a hybrid power system of a working machine according to the present invention;
FIG. 3 is a third schematic illustration of a hybrid powertrain of a work machine according to the present disclosure;
fig. 4 is a schematic control flow diagram of a hybrid system of a work machine according to the present invention.
Reference numerals:
a power switching device 110, an input 111 of the power switching device, a first output 112 of the power switching device, a second output 113 of the power switching device, a first input gear 114a, a second input gear 114b, a first transmission gear 115, a second transmission gear 116, a first output gear 117, a second output gear 118, a synchronizer 119;
an engine 121, a transmission 122, a motor 123;
a drive shaft 131, a drive shaft 132;
a boom pump 141, a main oil pump 142, a hydraulic pipeline 143 and an actuator 144;
controller 151, energy storage device 152, plug 153.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
Descriptions of "such as," "some embodiments," "examples," "specific examples," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
A hybrid system of a working machine of the present invention is described below with reference to fig. 1 to 3.
The working machine in the embodiment of the invention can be a pump truck, an automobile crane, an excavator, a pile driver, a concrete machine, a road roller, a mixer truck, a heading machine or a fire fighting truck and other working machines.
As shown in fig. 1 to 3, a hybrid system of a working machine according to an embodiment of the present invention includes: a power switching device 110, a power source, a drive shaft 132, and a hydraulic pump.
The power switching device 110 includes an input end 111, a first output end 112 and a second output end 113, wherein the first output end 112 is selectively engageable with the input end 111 of the power switching device 110, and the second output end 113 is selectively engageable with the input end of the power switching device 110.
It should be noted that the power coupling connection means that power transmission between components can be realized.
In some embodiments, in the case that the input end 111 of the power switching device 110 is connected with the first output end 112 in a power coupling manner, the input end 111 of the power switching device 110 is disconnected from the second output end 113, and power can be transmitted between the input end 111 and the first output end 112 of the power switching device 110; in the case that the input end 111 of the power switching device 110 is connected with the second output end 113 in a power coupling manner, the input end 111 of the power switching device 110 is disconnected from the first output end 112, and power can be transmitted between the input end 111 and the second output end 113 of the power switching device 110.
In other embodiments, when the input end 111 of the power switching device 110 is connected to the first output end 112 in a power coupling manner, the input end 111 of the power switching device 110 and the second output end 113 may also be connected in a power coupling manner, and the power input from the input end 111 of the power switching device 110 may be distributed to the first output end 112 and the second output end 113.
The power switching device may comprise a transfer case or a power take-off.
As shown in fig. 1-3, in some embodiments, the power switching device 110 may include: a first input gear 114a, a second input gear 114b, a first transmission gear 115, a second transmission gear 116, a first output gear 117, a second output gear 118, and a synchronizer 119.
The first input gear 114a and the second input gear 114b are coaxially and fixedly connected, and are fixedly connected with the input end 111 of the power switching device 110; the first output gear 117 is fixedly connected with the first output end 112; the first transmission gear 115 is coaxially and fixedly connected with the second transmission gear 116, the second transmission gear 116 is meshed with the second output gear 118, and the second output gear 118 is fixedly connected with the second output end 113; the synchronizer 119 is used for controlling the first input gear 114a to be meshed with the first transmission gear 115, or the synchronizer 119 is used for controlling the second input gear 114b to be meshed with or in power coupling connection with the first output gear 117.
When the synchronizer 119 synchronizes the second input gear 114b with the first output gear 117, the input 111 is in power coupling connection with the first output 112; when the synchronizer 119 synchronizes the first input gear 114a with the first transmission gear 115, the input end 111 is in power coupling connection with the second output end 113.
Of course, the power switching device 110 may also be in other structural forms, including but not limited to a planetary gear mechanism, such as a planetary gear mechanism with a ring gear, a sun gear and a planet carrier respectively forming the first to third ports, and in actual operation, by locking one of the ring gear, the sun gear and the planet carrier, the other two power coupling connections may be realized; of course, two of the ring gear, the sun gear, and the carrier may be used as a hybrid input, and the other may be used as an output.
The power source comprises an engine and a motor 123, the motor 123 is connected with the engine 121, and for example, the motor 123 is coaxially connected with the engine 121. The output end of the power source is in power coupling connection with the input end 111 of the power switching device 110.
The engine realizes power output by burning fuel oil, and is used for converting chemical energy into mechanical energy.
Engine 121 may be a diesel engine or a gasoline engine, with a diesel engine being the choice for work machines to provide even greater power.
The output shaft of the engine and the motor shaft of the motor 123 can be coaxially and fixedly connected, and the connection mode includes but is not limited to: and the connecting structure is connected through a coupling, a spline or a flange and the like.
The power source may further include: a transmission 122.
The connection mode of the motor 123 and the engine 121 can be a direct connection mode or an indirect connection mode.
The connection position of the motor 123 and the engine can be various, including but not limited to: an output of the engine 121 or an output of the transmission 122, etc., which will be described in detail in the following embodiments.
The output end of the power source may output the power of the engine 121 or the power of the motor 123 to the input end 111 of the power switching device 110, or output the power of the engine 121 and the power of the motor 123 to the input end 111 of the power switching device 110 in a mixed manner.
Drive shaft 132 is used to drive the chassis of the work machine, drive shaft 132 is used to couple power to the work machine's drive axle, which may include a differential, left and right axle shafts, and drive shaft 132 is used to couple power to the input of the differential.
The first output end 112 of the power switching device 110 is coupled to the driving shaft 132 by a power coupling method, including but not limited to: the connecting structure is connected through a coupling, a spline or a flange and the like; alternatively, as shown in fig. 1-3, the first output end 112 of the power switching device 110 is coupled to the driving shaft 132 via the transmission shaft 131, and the connection manner of the first output end 112 of the power switching device 110 via the transmission shaft 131 includes but is not limited to: the transmission shaft 131 is connected with the driving shaft 132 by a coupling, a spline or a flange, and the like, and the connection mode includes but is not limited to: and the connecting structure is connected through a coupling, a spline or a flange and the like.
Thus, when the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, the output end of the power source can drive the working machine to run, and the driving force can be power of the engine or power of the motor 123, or hybrid power of the engine and the motor 123.
The hydraulic pump is coupled to the second output end 113 of the power switching device 110, and the hydraulic pump may be used to drive a top-mounted work system of the working machine, where the top-mounted work system of the working machine is used to perform a working operation of the working machine, and the top-mounted work system of the working machine is different for different working machines, and correspondingly, the structure of the hydraulic pump is different.
In the case that the working machine is a pump truck, as shown in fig. 1 to 3, the hydraulic pump may include a boom pump 141 and a main oil pump 142, and both the boom pump 141 and the main oil pump 142 are in power coupling connection with the second output end 113 of the power switching device 110. The boom pump 141 is used for controlling the boom of the pump truck to be unfolded or folded, and the main oil pump 142 is used for controlling the pumping of concrete. The main oil pump 142 may be connected to an actuator 144 through a hydraulic line 143. The hydraulic pump may further include a gear pump for driving the tilt cylinder to swing and also for driving the fan to dissipate heat. In addition, in other embodiments of the present application, the hydraulic pump may also be one of a main oil pump, a gear pump, a boom pump, or two or three of them.
In the case where the work machine is a truck crane, the upper-mounted work system may include at least one of: a scutching mechanism, a telescopic mechanism, a hoisting mechanism, a slewing mechanism and the like. The input end of the hydraulic pump is in power coupling connection with the second output end 113 of the power switching device 110, and the hydraulic pump may be a plunger pump, an internal gear pump, an external gear pump, or the like. The hydraulic pump can control the amplitude mechanism, the telescopic mechanism, the winding mechanism, the swing mechanism and the like.
It will be appreciated that the hybrid system of the work machine may provide at least a plurality of operating modes for both the vehicle power of the work machine and the power source of the onboard work system:
first, the fuel drive mode.
The hybrid powertrain of the work machine may have a fuel-powered mode during either traveling or loading of the work system.
When the vehicle is driven, the engine is operated, the coaxially connected motor 123 idles, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
When the upper working system works, the engine works, the coaxially connected motor 123 idles, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Under the fuel driving mode, the engine can improve sufficient power for a travelling crane or a top-mounted operation system, and various high-power operation requirements of the travelling crane or the top-mounted operation system can be met.
And the second mode is a pure electric drive mode.
The hybrid power system of the working machine can have an electric-only driving mode during the operation of traveling or loading the working system.
When the vehicle is running, the engine is stopped, the coaxially connected motor 123 works, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
When the upper operating system works, the engine is stopped, the coaxially connected motor 123 works, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Under pure electric drive mode, can realize clean operation, reduce exhaust emissions, and in the operation process, the noise is lower.
And thirdly, a hybrid driving mode.
The hybrid powertrain of the work machine may have a hybrid drive mode during either traveling or loading of the work system.
When the vehicle is driven, the engine operates, the motor 123 operates, the output end of the power source can input the hybrid power of the engine and the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
When the upper operating system works, the engine works, the motor 123 works, the output end of the power source can input the hybrid power of the engine and the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Under the hybrid drive mode of operation, through the drive of two power supplies, can avoid the power not enough when using single power supply drive, can realize the output of very big power, effectively improved the maximum operating power of operation machinery.
According to the hybrid power system of the working machine of the embodiment of the invention, the motor 123 is connected with the engine, so that the hybrid power output can be conveniently realized, and the switching of various power modes can be conveniently realized through the switching of the power switching device 110, so that the working machine can work in various modes according to requirements, and the energy efficiency is high in various modes.
In some embodiments, as shown in fig. 1-3, the hybrid system may include: the controller 151 comprises a control circuit and a DC/AC converter, the control circuit is electrically connected with the engine 121 and the energy storage device 152, and two ends of the DC/AC converter are respectively electrically connected with the energy storage device 152 and the motor 123.
The electrical connection may be a wireless connection or a wired connection via a cable.
The control circuit is used to control the DC/AC converter, the motor, the energy storage device 152 and the motor 123. The DC/AC converter is used to convert DC power and AC power between the energy storage device 152 and the motor 123.
Therefore, the hybrid power system of the working machine can be switched into the pure electric driving mode or the hybrid driving mode when no external power supply is available. The energy storage device 152 may be a battery, such as a lead-acid battery, a lithium-iron-phosphate battery, a lithium-ion battery, or other form of electrical energy storage structure.
In some embodiments, as shown in fig. 1-3, the hybrid system may include: the plug connector is used for being electrically connected with an external power supply.
The controller 151 includes an AC/DC converter and an AC/AC converter, both ends of the AC/DC converter are electrically connected to the connector and the energy storage device 152, respectively, and both ends of the AC/AC converter are electrically connected to the connector and the motor 123, respectively.
The AC/DC converter is used to convert AC power and DC power between the connector and the energy storage device 152. The AC/AC converter is used to convert AC power between the connector and the motor 123.
The plug 153 may include a male plug or a female plug.
When the plug connector 153 is connected with an external power supply, the motor 123 can directly consume the electric energy of the external power supply to drive the upper-mounted operating system; when the external power supply is mains supply, the operation machine can keep long continuous operation time, and the operation process is clean and environment-friendly and has low noise.
In the actual operation process, the energy storage device 152 may be pre-charged, and there are various ways for charging the energy storage device 152, and the following description is made from two implementation points of view:
first, the energy storage device 152 is charged by an external power source.
In this embodiment, the plug 153 is connected to an external power source, and the energy storage device 152 can be charged by an AC/DC converter of the controller 151.
Second, energy recovery of the working machine.
In this embodiment, the motor 123 is a motor generator, in other words, the motor 123 can output power when it is connected to a power supply, and the motor can generate power when it receives power input. The two operating modes of the motor 123 can be switched under the control of the controller 151.
The motor 123 has a power generation mode, the hybrid system has a recovery mode, and in the recovery mode, the controller 151 is configured to control the motor 123 to operate in the power generation mode, the motor 123 generates power, and the input terminal of the power switching device 110 is in power coupling connection with the first output terminal 112 or the second output terminal 113.
The recovery mode comprises a first recovery mode and a second recovery mode;
in the first recovery mode, the controller 151 is configured to control the motor 123 to operate in the power generation mode, the motor 123 generates power, and the input end of the power switching device 110 is in power coupling connection with the first output end 112;
in the first recovery mode, the working machine travels, the engine drives the driving shaft 132 to rotate, so as to drive the working machine to travel, when the brake is stepped on, the engine does not work, the driving shaft 132 transmits power to the motor 123 through the transmission mechanism, and the energy storage device 152 can be charged by the motor 123 through power generation.
It can be understood that, through the motor 123 coaxially connected, the recovery of the braking energy can be conveniently realized, the energy utilization efficiency is improved, and a separate energy recovery generator 123 is not needed to be arranged, the transmission path from the motor 123 to the braking energy is short, and the recovery efficiency is high.
In the second recovery mode, the controller 151 is configured to control the engine to operate, control the motor 123 to operate in the power generation mode, control the motor 123 to generate power, and control the input of the power switching device 110 to be in power coupling connection with the second output.
In the second recovery mode, when the work machine is equipped with the work system and works and the output power of the engine is larger than the power required by the hydraulic pump, the motor 123 is switched into the power generation mode, and the engine simultaneously drives the motor 123 to generate power and the hydraulic pump to work.
It can be understood that the distribution of the power output by the engine can be conveniently realized through the coaxially connected motor 123, the branch transmission is not needed, the energy utilization efficiency can be improved, a separate energy recovery generator 123 is not needed, the transmission path from the motor 123 to the braking energy is short, and the recovery efficiency is high.
The hybrid system provided by the present invention can realize the following operation modes, wherein fig. 4 shows the following first to eighth operation modes, but the present application is not limited to these 8 operation modes, such as the energy recovery mode, and there may be other operation conditions besides the pumping condition exemplified in fig. 4.
First, the hybrid system provided by the invention has a fuel driving mode.
In the fuel driving mode, the controller 151 is configured to control the engine to operate, the coaxially connected motor 123 idles, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
Secondly, the hybrid power system provided by the invention has a fuel oil operation mode.
In the fuel operation mode, the controller 151 is configured to control the engine to operate, the coaxially connected motor 123 idles, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Thirdly, the hybrid power system provided by the invention has a pure electric driving mode.
In the pure electric driving mode, the controller 151 is configured to control the engine to be turned off, the motor 123 is powered by the energy storage device 152, the motor 123 operates, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
Fourthly, the hybrid power system provided by the invention has a first pure electric operation mode.
In the first pure electric operation mode, the controller 151 is configured to control the engine to be turned off, the motor 123 is powered by the energy storage device 152, the motor 123 operates, the output end of the power source can input the power of the motor 123 to the second output end 113 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Fifthly, the hybrid power system provided by the invention has a second pure electric operation mode.
In the second pure electric operation mode, the plug connector 153 is connected to the external power supply, the controller 151 is set to control the engine to be turned off, the motor 123 is powered by the external power supply, the motor 123 works, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
The hybrid power system provided by the invention has a hybrid mode, in the hybrid mode, the controller is set to control the engine to work, meanwhile, the energy storage device 152 supplies power to the motor 123, the motor 123 works in the electric mode, and the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112 or the second output end 113. When motor 123 is operating in the motoring mode, motor 123 may convert electrical energy to mechanical energy.
The mix mode may include a mix driving mode and a first mix operation mode.
Sixthly, the hybrid power system provided by the invention has a hybrid driving mode.
In the hybrid driving mode, the controller 151 is configured to control the engine and the motor 123 to operate, the energy storage device 152 supplies power to the motor 123, the motor 123 operates in the electric mode, the output end of the power source can input hybrid power to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112 of the power switching device 110, and the driving shaft 132 is driven.
Controller 151 may control the rotational speed and power of engine and motor 123, thereby improving the power and economy of travel of the work machine.
Seventhly, the hybrid power system provided by the invention has a first hybrid operation mode;
in the first hybrid operation mode, the controller 151 is configured to control the operation of the engine and the motor 123, the energy storage device 152 supplies power to the motor 123, the motor 123 operates in the electric mode, the output end of the power source can input hybrid power to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113 of the power switching device 110, and the hydraulic pump is driven.
The controller 151 can control the rotation speed and power of the engine and the motor 123, so that the output power of the hydraulic pump meets the working requirement of an upper-mounted working system (such as a pumping system), and the energy storage device 152 can complete the work in an area where power connection is inconvenient.
The hybrid power system provided by the invention has a second hybrid operation mode;
in the second hybrid operation mode, the controller 151 is configured to control the engine and the motor 123 to operate, an external power source connected to the plug connector supplies power to the motor 123, the motor 123 operates in the electric mode, the output end of the power source can input hybrid power to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113 of the power switching device 110, and the hydraulic pump is driven.
The controller 151 can control the rotation speed and power of the engine and the motor 123, so that the output power of the hydraulic pump meets the operation requirement of an upper operating system (such as a pumping system), and the long-time operation can be ensured by supplying power from an external power supply.
Ninth, the hybrid system provided by the invention has a power generation mode.
In the power generation mode, the controller 151 is configured to control the engine to operate, and control the motor 123 to enter the power generation mode, the engine drives the motor 123 to generate power, and the power generated by the motor 123 is stored in the energy storage device 152. When the motor 123 is controlled to enter the power generation mode, the motor 123 is used to convert mechanical energy into electrical energy.
The hybrid power system provided by the invention has a charging mode.
In the charging mode, the plug connector 153 is connected to an external power source, and the controller 151 controls the external power source to charge the energy storage device 152.
The hybrid power system provided by the invention has a braking energy recovery mode.
In the braking energy recovery mode, the controller 151 is configured to control the engine to operate, control the motor 123 to generate power, and connect the input end of the power switching device 110 with the first output end 112 in a power coupling manner;
when the operation machine runs, the engine 121 drives the driving shaft 132 to rotate, so that the operation machine is driven to run, when the brake is stepped on, the driving shaft 132 transmits power to the motor 123 through the transmission mechanism, and the energy storage device 152 can be charged by the power generated by the motor 123.
It can be understood that, through the motor 123 coaxially connected, the recovery of the braking energy can be conveniently realized, the energy utilization efficiency is improved, and a separate energy recovery generator 123 is not needed to be arranged, the transmission path from the motor 123 to the braking energy is short, and the recovery efficiency is high.
In this application, the motor may idle when not in operation.
On the basis of any one of the above embodiments, three embodiments of the present invention will be described below with reference to the accompanying drawings.
Example one
As shown in fig. 1, the power source may further include a transmission 122, an output end of the engine 121 is connected to an input end of the transmission 122 in a power coupling manner, and an output end of the transmission 122 is coaxially connected to the motor 123.
The motor 123 has a power generation mode, and the hybrid system has a charging mode; in the charging mode, the controller is configured to control the engine 121, the transmission 122 and the motor 123 to operate simultaneously and the motor 123 to operate in the power generation mode.
In the charging mode, the transmission 122 is engaged in the target gear (non-neutral), the driving motor 123 generates power to charge the energy storage device 152, and the input end 111 of the power switching device 110 is coupled to the second output end 113, i.e. the power switching device operates in the pumping mode, at which time the hydraulic pump can idle and does not work.
Like this, this hybrid power system need not to change the internal connection structure of traditional engine, only need externally install additional motor 123 can, the repacking is convenient, and when carrying out braking energy recovery, power transmission route is short, and recovery efficiency is high.
The motor 123 may be mounted on the transmission 122, and may be mounted on a case of the transmission 122. The power switching device 110 can be installed in a top-up system, and the top-up system can be basically not changed only by replacing the chassis with a hybrid chassis, so that the replacement is simple and the cost is saved. And because the gearbox 122 is arranged, the speed change can be realized under the driving working condition and the pumping working condition.
Example two
As shown in fig. 2, the power source may further include a transmission 122, and an output of the engine 121 is power-coupled to an input of the transmission 122 through a motor 123. The engine 121 and the motor 123 are coaxially arranged, an output end of the motor 123 is in power coupling connection with an input end of the transmission 122, and an output end of the transmission 122 is in power coupling connection with the input end 111 of the power switching device 110.
In other words, the output of the engine 121 is coupled to the motor shaft of the motor 123, and the motor shaft of the motor 123 is coupled to the input of the transmission 122.
The motor 123 has a power generation mode, and the hybrid system has a charging mode; in the charging mode, the controller is configured to control the engine 121 and the motor 123 to operate simultaneously and the motor 123 to operate in the generating mode, and the transmission 122 is shifted to neutral.
For the hybrid power system, the engine 121 can be directly used for driving the motor 123 to generate power after the transmission 122 switches the neutral gear, the electric energy is stored in the power energy storage device 152, in the whole power generation process, the hybrid power system does not need to do work outwards, the power transmission path is short, and the power generation efficiency is higher.
The motor 123 may be mounted on the transmission 122, and may be mounted on a case of the transmission 122. The power switching device 110 can be installed in a top-up system, and the top-up system can be basically not changed only by replacing the chassis with a hybrid chassis, so that the replacement is simple and the cost is saved. And because the gearbox 122 is arranged, the speed change can be realized under the driving working condition and the pumping working condition.
EXAMPLE III
As shown in fig. 3, the control circuit is electrically connected to the hydraulic pump. For example, in fig. 3, the control circuit of the controller 151 is electrically connected to the boom pump 141 and the main oil pump 142.
The controller 151 is configured to control the engine to operate when the control circuit determines that the power of the hydraulic pump is greater than the rated power of the motor 123 while the motor 123 is operated and the engine is stopped.
Therefore, the hybrid power system can be automatically switched to a hybrid operation mode, and automatic intervention of the engine is realized. Of course, the user can also manually control the engine to work, and the hybrid manual switching is realized.
For such a hybrid system, the controller 151 may monitor the operating state of the hydraulic pump, automatically control the engine intervention, and avoid insufficient output power of the motor 123 in the operating mode.
In the first electric-only operation mode, the controller 151 may monitor that the power of the hydraulic pump is higher than the rated power of the motor 123 or that the speed increase of the hydraulic pump is higher than a target value, and may control the hybrid system to switch to the first hybrid operation mode.
In the second pure electric operation mode, the hybrid power system is switched into the second hybrid operation mode, and the controller may monitor that the power of the hydraulic pump is greater than the rated power of the motor 123 or that the speed increase of the hydraulic pump is greater than a target value, and may control the hybrid power system to switch into the second hybrid operation mode.
The invention also provides a working machine.
The working machine in the embodiment of the invention can be a pump truck, a vehicle-mounted pump, an automobile crane, an excavator, a pile driver, a concrete machine, a road roller, a mixer truck, a heading machine or a fire fighting truck and other working machines.
A working machine according to an embodiment of the present invention includes the hybrid system of a working machine according to any one of the embodiments described above.
According to the working machine provided by the embodiment of the invention, the motor 123 and the engine are coaxially arranged, so that hybrid power output can be conveniently realized, and the switching of various power modes can be conveniently realized through the switching of the power switching device 110, so that the working machine can work in various modes according to requirements, and the energy efficiency is high in various modes.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (14)

1. A hybrid powertrain system for a work machine, comprising:
a power switching device including an input, a first output, and a second output, both of which are selectively engageable with the input of the power switching device;
the power source comprises an engine and a motor connected with the engine, and the output end of the power source is in power coupling connection with the input end of the power switching device;
the driving shaft is in power coupling connection with the first output end and is used for driving a chassis to run;
the hydraulic pump is in power coupling connection with the second output end.
2. The hybrid system for a work machine according to claim 1, further comprising:
an energy storage device;
and the controller comprises a control circuit and a DC/AC converter, the control circuit is electrically connected with the engine and the energy storage device, and two ends of the DC/AC converter are respectively electrically connected with the energy storage device and the motor.
3. The hybrid system of a work machine of claim 2, wherein the hybrid system has a hybrid mode;
in the hybrid mode, the controller is set to control the engine to work, the energy storage device supplies power to the motor and the motor works in the electric mode, and the input end of the power switching device is in power coupling connection with the first output end or the second output end.
4. The hybrid system of a work machine of claim 2, wherein the electric machine has a power generation mode and the hybrid system has a recovery mode;
in the recovery mode, the motor works in a power generation mode, and the input end of the power switching device is in power coupling connection with the first output end or the second output end.
5. The hybrid system for a work machine according to claim 2, further comprising:
the plug connector is used for being electrically connected with an external power supply;
the controller further comprises an AC/DC converter and an AC/AC converter, two ends of the AC/DC converter are respectively and electrically connected with the plug connector and the energy storage device, and two ends of the AC/AC converter are respectively and electrically connected with the plug connector and the motor.
6. The hybrid system of a work machine of claim 5, wherein the hybrid system has a second hybrid operation mode;
in the second hybrid operation mode, the controller is set to control the engine to work, the plug connector supplies power to the motor, the motor works in an electric mode, and the input end of the power switching device is in power coupling connection with the second output end.
7. The hybrid system for a work machine of claim 2, wherein said control circuit is electrically connected to said hydraulic pump and said controller is configured to control operation of said engine when said control circuit determines that the power of said hydraulic pump is greater than the rated power of said electric motor when said electric motor is on and said engine is off.
8. The hybrid system of a working machine according to any one of claims 1-6, wherein the power source further comprises a transmission, an output of the engine is in power-coupled connection with an input of the transmission, and an output of the transmission is in coaxial connection with the electric machine.
9. The hybrid system for a working machine according to any one of claims 1-6, wherein the power source further includes a transmission, the engine is disposed coaxially with the motor, an output of the motor is connected to an input of the transmission in a power coupling manner, and an output of the transmission is connected to an input of the power switching device in a power coupling manner.
10. The hybrid system of a work machine of claim 9, wherein the electric machine has a power generation mode and the hybrid system has a charging mode;
in the charging mode, the controller is configured to control the engine and the electric machine to operate simultaneously and the electric machine to operate in a generating mode, and the transmission is shifted to neutral.
11. The hybrid system of a work machine of any of claims 1-6, wherein the power source further comprises a transmission, the electric machine being mounted on the transmission.
12. Hybrid system for a working machine according to any of claims 1-6, wherein the hydraulic pump comprises at least one of a main oil pump, a gear pump, a boom pump.
13. The hybrid system for a work machine of any one of claims 1-6, wherein the power switching device comprises a transfer case or a power take-off.
14. A work machine, characterized by comprising a hybrid system of a work machine according to any one of claims 1-13.
CN202110480218.1A 2021-04-30 2021-04-30 Hybrid power system of working machine and working machine Pending CN113085529A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024432A1 (en) * 2021-08-27 2023-03-02 三一汽车制造有限公司 Hybrid power system and operation machine
WO2024027139A1 (en) * 2022-08-01 2024-02-08 三一重型装备有限公司 Hybrid power system and operation machinery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024432A1 (en) * 2021-08-27 2023-03-02 三一汽车制造有限公司 Hybrid power system and operation machine
WO2024027139A1 (en) * 2022-08-01 2024-02-08 三一重型装备有限公司 Hybrid power system and operation machinery

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