KR20140034547A - Hybrid forklift system for improving fuel efficiency - Google Patents

Hybrid forklift system for improving fuel efficiency Download PDF

Info

Publication number
KR20140034547A
KR20140034547A KR1020120101018A KR20120101018A KR20140034547A KR 20140034547 A KR20140034547 A KR 20140034547A KR 1020120101018 A KR1020120101018 A KR 1020120101018A KR 20120101018 A KR20120101018 A KR 20120101018A KR 20140034547 A KR20140034547 A KR 20140034547A
Authority
KR
South Korea
Prior art keywords
motor
controller
driving
battery
power generation
Prior art date
Application number
KR1020120101018A
Other languages
Korean (ko)
Inventor
김성철
최세경
정명길
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020120101018A priority Critical patent/KR20140034547A/en
Publication of KR20140034547A publication Critical patent/KR20140034547A/en

Links

Images

Classifications

    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/28—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
    • 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
    • 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
    • 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
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present disclosure relates to a hybrid forklift system for improving fuel efficiency. The hybrid forklift system includes an engine which generates a power and has an engine controller; a generating motor which is connected to an output axle and has a generation controller; a hydraulic pump connected to the output axle of the generating motor; a main control valve which is connected to the hydraulic pump and adjusts pressure and a flow meter of oil pressure provided from the hydraulic pump to an actuator; a battery which is connected with the generating motor, and inputted with a power from the generating motor or outputs a power from the generating motor or a driving motor, and has a battery controller; and the driving motor which is connected with the battery. The driving motor is separated and formed to each of driving wheel, and controls a driving, a rotation speed and a rotation direction of the driving wheel. Fuel economy is improved through light weight which removes an apparatus such as a transmission used in an engine motor type forklift. Driveline of the forklift is compactly designed by removing an apparatus such as a transmission, and improved with a system layout of the forklift and a degree of freedom of a design. [Reference numerals] (11) Engine control unit; (21) Control unit for generator; (400) Display device; (51) Battery controller; (61) Control unit for driving

Description

Hybrid forklift system for improving fuel efficiency {HYBRID FORKLIFT SYSTEM FOR IMPROVING FUEL EFFICIENCY}

The present invention relates to a hybrid forklift system, and more particularly, to a hybrid forklift system in which fuel efficiency is improved.

With the recent rise in oil prices, vehicle sales have already been increasing in the automotive sector using electric power systems to improve energy efficiency, such as hybrid and electric vehicles.

In the field of heavy equipment, the application of such electric power system is increasing, and the development of heavy equipment that applies the electric power system to forklifts, excavators, wheel loaders, etc., is actively progressing.

On the other hand, heavy equipment such as forklifts are equipments that work in construction or industrial sites, and the fuel consumption is much higher than that of automobiles, so the fuel cost is much higher than the maintenance cost of the equipment. Faced with environmental problems.

In order to meet these demands for improving fuel economy and respond to environmental issues, heavy equipment manufacturers have developed and applied various engine and pump power control technologies.

Therefore, to develop and improve a hybrid power system that combines a relatively efficient and eco-friendly electric power system (system consisting of a large capacity battery, electric motor, inverter, etc.) and an engine power system in order to dramatically improve energy efficiency and work performance. Various research and development is needed.

In addition, it is also necessary to research and develop to improve fuel efficiency by reducing the weight of the vehicle body using a hybrid power system.

In other words, if the transmission, torque converter, differential gear, etc., which are commonly used in engine-powered heavy equipment, are removed from the hybrid power system, the heavy-duty body of the forklift, etc. will be lighter and more efficient. Replacing it with an electric motor battery, etc. can reduce energy loss and reduce engine capacity to improve fuel economy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and replaces a device such as a transmission used in an engine-powered forklift with high-efficiency electronics to reduce the weight, reduce energy loss, and reduce the engine capacity. to provide.

The technical object of the present invention is not limited to the above-mentioned technical objects and other technical objects which are not mentioned can be clearly understood by those skilled in the art from the following description will be.

The present invention to solve the above problems, the engine to produce power, the engine controller is provided; A power generation motor connected to the output shaft of the engine and provided with a power generation controller; A hydraulic pump connected to the output shaft of the electric motor for power generation; A main control valve connected to the hydraulic pump and controlling a pressure and a flow rate of the pressure oil supplied from the hydraulic pump to the actuator; A battery connected to the power generation motor, receiving power from the power generation motor or outputting power to the power generation motor or the driving motor, and including a battery controller; And a driving motor connected to the battery and provided separately for each driving wheel, controlling driving, rotational speed, and rotational direction of the driving wheel, and including a driving controller. It provides a hybrid forklift system comprising a.

In addition, a power generation motor inverter provided between the power generation motor and the battery, the power generation motor inverter for adjusting the input power amount of the power generation motor or the battery; As shown in FIG.

In addition, a driving motor inverter provided between the driving motor and the battery, the driving motor inverter for adjusting the input power amount of the driving motor or the battery; As shown in FIG.

In addition, an upper controller connected to the engine controller, the power generation controller, the battery controller and the driving controller; As shown in FIG.

The display apparatus may be connected to the engine controller, the power generation controller, the battery controller, the driving controller, and an upper controller; As shown in FIG.

In addition, the battery,

A selection switch capable of selective electrical connection to the power generation motor or the driving motor may be provided.

According to the present invention, by replacing a device such as a transmission used in the engine-powered forklift truck with high-efficiency electronics, there is an effect that the fuel economy is improved through light weight and energy loss.

In addition, the drive system of the forklift can be compactly designed by removing devices such as transmissions, and the system layout and design freedom of the forklift are improved.

1 is a schematic view showing the configuration of a hybrid forklift system according to an embodiment of the present invention;
Figure 2 is a perspective view showing the main part of the ground vehicle is mounted hybrid forklift system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Of course.

Hybrid forklift system according to an embodiment of the present invention, as shown in Figure 1, the engine 10, the electric motor 20, the hydraulic pump 30, the main control valve 40, the battery 50 and The driving motor 60 is included.

The engine 10 serves to generate power required for the hybrid forklift, and the power generated from the engine 10 is transmitted to the electric motor 20 for generation connected to the output shaft.

The engine 10 may use a general gasoline engine, a diesel engine, and the like, and includes an engine controller 11.

The engine controller 11 adjusts the output of the engine 10, and in particular, when the hybrid forklift does a job that does not require a large output such as a simple driving, the operation of the engine 10 is stopped and the battery ( 50) to operate the hybrid forklift only.

The power generation motor 20 is connected to the output shaft of the engine 10 receives the power produced by the engine 10, the hydraulic pump 30 is connected to the output shaft of the power generation motor 20 It operates to produce electric power to charge the battery 50 and to provide electric power to the driving motor 60, and includes a power generation controller 21.

In addition, the electric motor 20 for power generation serves as a generator during regenerative braking by the drive wheel 1 and the actuator 2 to produce power, and the generated power is charged in the battery 50.

The power generation controller 21 controls the distribution of power provided by the power generation motor 20 to the hydraulic pump 30, the battery 50, and the driving motor 60, and the power generation motor 20. ) Acts as a motor or generator.

The hydraulic pump 30 is connected to the output shaft of the electric motor 20 for power generation receives a driving force from the hydraulic pump 30, is connected to the main control valve 40 and the pipe and the main control valve 40 And serves to supply pressure oil to the actuator (2).

The main control valve 40 is connected to the hydraulic pump 30 by a pipe and supplied with pressure oil therefrom, and the pressure and flow rate of the pressure oil supplied to an actuator 2 such as a fork cylinder operated hydraulically in a hybrid forklift truck. It plays a role in controlling.

The battery 50 further includes a battery controller 51 and a selector switch 52. The battery 50 is connected to the power generation motor 20 and the driving motor 60, and travels with the power generation motor 20. Receives power from the electric motor 60 or serves to output power to the electric motor 20 for generation.

That is, when the electric motor 20 for generation receives power from the engine 10, a part of the power produced is input to the battery 50 and stored as electric energy. In addition, since the driving motor 60 also plays a role of a generator during regenerative braking, a part or all of the power produced during regenerative braking is input to the battery 50 and stored as electrical energy.

In addition, when a large output is not required when the hybrid forklift is simply driven, power may be output from the battery 50 without using the engine 10 to operate the driving motor 60.

In addition, when the required load of the hydraulic portion of the hybrid forklift is very large, the battery 50 serves to assist the engine 10 by outputting power to the electric motor 20 for generation.

In addition, when the required load of the running portion of the hybrid forklift is very large, the engine 10 serves to assist the batter by generating the electric motor 20 for power generation and transferring electric energy to the motor for driving.

The battery controller 51 checks the state of charge such as the amount of charge of the battery 50, controls the various cells to be uniformly charged and discharged during the charging and discharging of the battery 50, and manages the battery 50. It serves to deliver the information necessary for the upper controller 300.

The selection switch 52 is controlled by the upper controller 300 that is electrically connected, and the battery 50 may be selectively connected to the power generation motor 20 or the driving motor 60. To help.

That is, when the power generation motor 20 operates as a generator or operates as an electric motor, the battery 50 transfers power only to the driving motor 60 or the driving motor 60 and the power generation motor ( According to various situations, such as when power is simultaneously transmitted to 20, the selection switch 52 may combine electrical connections with respect to the battery 50 and the power generation motor 20 or the driving motor 60. have.

The driving motor 60 is connected to the battery 50 and is provided separately for each of the driving wheels 1, and the driving, rotational speed, rotational direction, rotational torque, and the like of the driving wheel 1 are provided. It serves to control and includes a driving controller (61).

The driving controller 61 controls the output, the rotational speed and the rotational direction of the driving motor 60 so that the driving motor 60 can control the driving wheel 1.

In addition, the driving electric motor 60 is provided for each of the driving wheels 1 for receiving the electric power from the battery 50 to drive the hybrid forklift, and drive the driving wheels 1. In addition, the driving motor 60 is controlled by the upper controller 300, the driving controller 61, and the driving motor 60 inverter, and the driving, rotational speed, and rotational direction of the respective driving wheels 1 are controlled. And adjust the torque independently.

Accordingly, the driving motor 60 adjusts the traveling speed, driving direction, rotational motion, etc. of the hybrid forklift truck in place of a transmission, a torque converter, a differential gear, and the like installed in a general vehicle.

On the other hand, the hybrid forklift system according to an embodiment of the present invention further includes a power generation motor inverter 100 electrically connected to and controlled by the power generation controller 21.

The power generation motor inverter 100 is provided between the driving motor 60 and the battery 50 and acts bidirectionally, so that the power generation motor 20 operates from the battery 50 when the power generation motor 20 operates as an electric motor. The power input amount to the power generation motor 20 is adjusted, and when the power generation motor 20 operates as a generator, it controls the power input amount from the power generation motor 20 to the battery 50.

On the other hand, the hybrid forklift system according to an embodiment of the present invention further includes a driving motor inverter 200 electrically connected to and controlled by the driving controller 61.

The driving motor inverter 200 is provided between the driving motor 60 and the battery 50 and acts bidirectionally, so that the driving motor 60 operates from the battery 50 when the driving motor 60 operates as an electric motor. Regulates the power input amount to the driving motor 60, and adjusts the power input amount from the driving motor 60 to the battery 50 when power is generated by regenerative braking of the driving wheel (1). Do it.

On the other hand, the hybrid forklift system according to an embodiment of the present invention further includes a higher controller 300.

The upper controller 300 is electrically connected to the engine controller 11, the power generation controller 21, the selection switch 52, the battery controller 51, and the driving controller 61 to operate the hybrid forklift. It controls the overall power system.

On the other hand, the hybrid forklift system according to an embodiment of the present invention further includes a display device (400).

The display apparatus 400 is electrically connected to the power generation controller 21, the battery controller 51, the driving controller 61, and the upper controller 300, and receives a signal from the display device 400, and thus, the overall forklift of the hybrid forklift truck. It displays the operation status so that the driver can see it.

In Figure 2 is shown the main part of the ground vehicle is equipped with a hybrid forklift system according to an embodiment of the present invention.

As described above, by controlling the driving wheel 1 by using a plurality of driving motors 60 that operate independently of the hybrid forklift, a device such as a transmission, a torque converter, a differential gear, and the like installed in a general vehicle can be obtained. Can be removed

Therefore, compared with the general forklift, the hybrid forklift can design a drive system compactly, and the system layout and design freedom are improved.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

1: drive wheel
2: actuator
10: Engine
20: electric motor for power generation
30: hydraulic pump
40: main control valve
50: Battery
60: driving motor
100: electric motor inverter for power generation
200: driving motor inverter
300: upper controller
400: display device

Claims (6)

An engine for producing power and having an engine controller;
A power generation motor connected to the output shaft of the engine and provided with a power generation controller;
A hydraulic pump connected to the output shaft of the electric motor for power generation;
A main control valve connected to the hydraulic pump and controlling a pressure and a flow rate of the pressure oil supplied from the hydraulic pump to the actuator;
A battery connected to the power generation motor, receiving power from the power generation motor or outputting power to the power generation motor or the driving motor, and including a battery controller; And
A driving motor connected to the battery and provided separately for each driving wheel, controlling driving, rotation speed, and rotation direction of the driving wheel, and including a driving controller; Hybrid forklift system comprising a. The method of claim 1,
A power generation motor inverter provided between the power generation motor and the battery and controlling an input power amount of the power generation motor or the battery; Hybrid forklift system further comprising. The method of claim 1,
A driving motor inverter provided between the driving motor and the battery and adjusting an input power amount of the driving motor or the battery; Hybrid forklift system further comprising. The method of claim 1,
An upper controller connected to the engine controller, the power generation controller, the battery controller, and the driving controller; Hybrid forklift system further comprising. The method of claim 1,
A display device connected to the engine controller, the power generation controller, the battery controller, the driving controller, and an upper controller; Hybrid forklift system further comprising. The method of claim 1,
The battery includes:
Hybrid forklift system, characterized in that the selection switch for the selective electrical connection to the electric motor for driving or the driving motor is provided.
KR1020120101018A 2012-09-12 2012-09-12 Hybrid forklift system for improving fuel efficiency KR20140034547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120101018A KR20140034547A (en) 2012-09-12 2012-09-12 Hybrid forklift system for improving fuel efficiency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120101018A KR20140034547A (en) 2012-09-12 2012-09-12 Hybrid forklift system for improving fuel efficiency

Publications (1)

Publication Number Publication Date
KR20140034547A true KR20140034547A (en) 2014-03-20

Family

ID=50644939

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120101018A KR20140034547A (en) 2012-09-12 2012-09-12 Hybrid forklift system for improving fuel efficiency

Country Status (1)

Country Link
KR (1) KR20140034547A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160007879A (en) * 2014-07-07 2016-01-21 현대중공업 주식회사 The hybrid forklift
KR101963837B1 (en) 2017-12-19 2019-07-31 금아파워텍주식회사 Hydraulic Hybrid Transmission with Hydraulic Motor and Torque Converter in Transmission
KR101963834B1 (en) 2017-12-19 2019-07-31 금아파워텍주식회사 Hydraulic Hybrid Transmission with control of Hydraulic Motor
WO2022015086A1 (en) * 2020-07-17 2022-01-20 두산인프라코어 주식회사 Hybrid power distribution system for construction machine
CN114875983A (en) * 2022-06-21 2022-08-09 吉林大学 Site power consumption electro-hydraulic hybrid wheel loader

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160007879A (en) * 2014-07-07 2016-01-21 현대중공업 주식회사 The hybrid forklift
KR101963837B1 (en) 2017-12-19 2019-07-31 금아파워텍주식회사 Hydraulic Hybrid Transmission with Hydraulic Motor and Torque Converter in Transmission
KR101963834B1 (en) 2017-12-19 2019-07-31 금아파워텍주식회사 Hydraulic Hybrid Transmission with control of Hydraulic Motor
WO2022015086A1 (en) * 2020-07-17 2022-01-20 두산인프라코어 주식회사 Hybrid power distribution system for construction machine
CN114875983A (en) * 2022-06-21 2022-08-09 吉林大学 Site power consumption electro-hydraulic hybrid wheel loader
CN114875983B (en) * 2022-06-21 2023-06-27 吉林大学 Electro-hydraulic hybrid power wheel loader for field

Similar Documents

Publication Publication Date Title
US9038759B2 (en) Hybrid work vehicle
US7950481B2 (en) Electric powertrain for machine
KR101690357B1 (en) Construction machinery
EP2427357B1 (en) A working machine and a method for operating a working machine
US7497285B1 (en) Hybrid electric vehicle
US20140358340A1 (en) Hybrid electric vehicle
CN102490720B (en) Power assembly control method for hybrid engineering machine, and hybrid assembly system
KR20080098060A (en) Working vehicle
JP2009511786A (en) Work machine and operation method of work machine
JP2007524540A (en) Hydraulic hybrid vehicle having integrated hydraulic drive module and four-wheel drive, and method of operating the same
EP2836409B1 (en) Hybrid vehicle drive idle reduction system and method
KR20140034547A (en) Hybrid forklift system for improving fuel efficiency
CN112814054A (en) Pure electric drive system of loader and loader
CN101434193A (en) Series-parallel connection type hybrid power drive system and coach with the same
US20150114739A1 (en) Hydraulic Hybrid Vehicle
JP5848727B2 (en) Hybrid wheel loader
US20160280071A1 (en) Hydraulic hybrid vehicle
CN214574205U (en) Pure electric drive system of loader and loader
CN105730214A (en) Hybrid driving system with single prepositioned transmission shaft and rear drive axle
CN212022286U (en) Functional accessory integration system of new energy engineering vehicle and new energy engineering vehicle
JP2013500223A (en) Hoist system and method
CN201176122Y (en) Series parallel type mixing power drive system and passenger car with the drive system

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application