WO2021241881A1 - Control system for electric type vehicle - Google Patents

Control system for electric type vehicle Download PDF

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Publication number
WO2021241881A1
WO2021241881A1 PCT/KR2021/004682 KR2021004682W WO2021241881A1 WO 2021241881 A1 WO2021241881 A1 WO 2021241881A1 KR 2021004682 W KR2021004682 W KR 2021004682W WO 2021241881 A1 WO2021241881 A1 WO 2021241881A1
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WO
WIPO (PCT)
Prior art keywords
accumulator
fluid
hydraulic
industrial vehicle
parking brake
Prior art date
Application number
PCT/KR2021/004682
Other languages
French (fr)
Korean (ko)
Inventor
박중순
Original Assignee
금아파워텍주식회사
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Publication date
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Publication of WO2021241881A1 publication Critical patent/WO2021241881A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
    • 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
    • B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
    • 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
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
    • 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
    • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/40—Working vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/15—Fork lift trucks, Industrial trucks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/50—Monitoring, detection and testing means for accumulators
    • F15B2201/51—Pressure detection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the present invention relates to a control system for an electric industrial vehicle, and more particularly, to ensure required performance and improve performance by combining a driving motor alone or a driving motor and a hydraulic motor according to the torque required during driving of the electric industrial vehicle. And, it relates to a control system of an electric industrial vehicle that releases a parking brake device by hydraulic pressure for operating equipment such as a lift when the engine is turned on for driving of an electric industrial vehicle.
  • construction equipment and industrial vehicles such as commercial vehicles, forklifts and wheel loaders (hereinafter referred to as 'industrial vehicles') are classified into engine-type industrial vehicles and electric industrial vehicles according to power sources.
  • electric industrial vehicles are mostly used indoors for reasons such as pollution, and these electric industrial vehicles are equipped with power devices such as a driving motor for driving the vehicle and a hydraulic motor for driving a lift.
  • the driving motor 30 is mounted on the drive axle 40 of the industrial vehicle and receives power from the battery 10 according to the control signal of the controller 20. By being supplied and driven to drive the drive axle 40, the driving wheel mounted on the axle hub is moved forward and backward.
  • the hydraulic motor 50 receives power from the battery 10 according to the control signal of the controller 20 and drives the hydraulic pump 60 to operate the hydraulic pump 60, so that equipment such as a lift is operated by hydraulic pressure. do.
  • the driving motor 30 is driven only when the industrial vehicle is driven, and the hydraulic motor 50 is driven only when equipment such as a lift is operated.
  • a high-capacity, high-output driving motor equivalent to the engine output of an engine-type industrial vehicle equipped with an internal combustion engine (engine) is applied to the electric industrial vehicle, which responds to the start and low speed of the industrial vehicle This is to respond to the high torque requirement for high-speed rotation and high-speed rotation to secure the highest speed of industrial vehicles.
  • the conventional electric industrial vehicle requires a bulky driving motor as a high-output driving motor is applied, thereby limiting the design freedom of the industrial vehicle, increasing the cost of the electric industrial vehicle production, and increasing the cost of the battery.
  • the conventional electric industrial vehicle is provided with a brake system in a structure to reduce the number of revolutions of the traveling motor 30 during braking by being driven when the traveling motor 30 is driven, so that the engine type industrial vehicle is provided. It will not be equipped with a hydraulic parking brake system like a vehicle.
  • the parking brake device for maintaining the brake state when the electric industrial vehicle is stopped has a problem that a separate hydraulic line must be installed, so that the structure is very complicated, and the manufacturing cost is increased accordingly. .
  • the present invention has been devised in view of the various problems described above, and the technical problem to be solved by the present invention is to improve the design freedom of an industrial vehicle by applying a low or medium-power driving motor having a relatively small volume, and to produce an industrial vehicle It is to provide a control system for an electric industrial vehicle that can reduce costs and increase battery power efficiency.
  • the technical problem to be solved by the present invention is to apply a low or medium power traveling motor having a relatively small volume, so that only the output of the traveling motor is transmitted to the drive axle at medium speed/heavy load or higher, and starting and low speed of an industrial vehicle
  • a high torque is required for response and a high-speed rotation is required to secure the highest speed of an industrial vehicle
  • the output of the hydraulic motor for driving the lift and the driving motor is simultaneously transmitted to the drive axle, thereby improving the design freedom of industrial vehicles. It is to provide a control system for an electric industrial vehicle that can reduce the cost of industrial vehicle production and increase battery power efficiency.
  • a parking brake system for an electric industrial vehicle that locks or releases the parking brake by hydraulic pressure for operating a lift, etc. without installing a separate hydraulic line for only the parking brake. is to provide
  • the technical problem to be solved by the present invention is to improve the design freedom of the industrial vehicle by configuring the parking brake to be locked or released using a hydraulic line provided to operate a lift, etc., and to increase the cost of industrial vehicle production It is to provide a parking brake system for an electric industrial vehicle that can reduce
  • a control system for an electric industrial vehicle for solving the above problems includes: a driving motor for driving a drive axle as it is driven by receiving power according to a control signal from a control unit; a hydraulic motor driven by receiving power according to a control signal of the control unit; a hydraulic pump operated by driving the hydraulic motor to supply a fluid in the hydraulic tank; a clutch for connecting or releasing the output of the hydraulic motor to be transmitted to the drive axle according to the amount of torque required when the electric industrial vehicle is driven; and a parking brake device for locking or releasing the parking brake by hydraulic pressure according to driving of the driving motor on or off.
  • an accumulator for storing a fluid of a set pressure by operation of the hydraulic pump, a main control valve controlling the fluid to be stored at a set pressure in the accumulator, and the hydraulic pump and the accumulator are disposed between the accumulator and the fluid to the accumulator It may be configured to further include an on/off valve for supplying.
  • the configuration further includes a first directional selector valve configured to supply the fluid stored in the accumulator to the cylinder of the clutch or return the fluid in the cylinder of the clutch to the hydraulic tank.
  • a second directional selector valve configured to supply the fluid stored in the accumulator to the cylinder of the parking brake device or return the fluid in the cylinder of the parking brake device to the hydraulic tank according to a control signal from the control unit. It may consist of
  • the apparatus further includes a pressure sensor for measuring the pressure in the accumulator, and when the pressure measurement value in the accumulator by the pressure sensor is within a set range, the control unit applies an operation signal to the hydraulic pump to flow the fluid into the accumulator It is possible to maintain the set pressure by supplying the
  • the design freedom of the industrial vehicle is improved, the cost of industrial vehicle production is reduced, and the , a useful effect of increasing the power efficiency of the battery may be provided.
  • a low or medium output driving motor having a relatively small volume is applied, and only the output of the driving motor is transmitted to the drive axle at medium speed/heavy load or higher,
  • the output of the hydraulic motor for driving the lift and the traveling motor is simultaneously transmitted to the drive axle, A very useful effect of improving the design freedom, reducing the cost of industrial vehicle production, and increasing the power efficiency of the battery can be provided.
  • the parking brake is configured to be locked or released by hydraulic pressure for operating a lift, etc. without installing a separate hydraulic line for only the parking brake, It is possible to provide useful effects such as improved design freedom of the industrial vehicle and reduction in cost according to the production of the industrial vehicle.
  • the effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.
  • FIG. 1 is a block diagram showing a control relationship of a conventional electric industrial vehicle.
  • FIG. 2 is a block diagram illustrating a control relationship of a control system for an electric industrial vehicle according to an embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating an operation relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention.
  • 4 to 9 are schematic diagrams showing the operation relationship of the control system of the electric industrial vehicle according to an embodiment of the present invention.
  • 10 to 12 are flowcharts illustrating an operation relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a control relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention
  • FIG. 3 is a block diagram illustrating an operation relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention.
  • FIGS. 4 to 9 are schematic diagrams showing the operation relationship of the control system of the electric industrial vehicle according to the embodiment of the present invention
  • FIGS. 10 to 12 are the operation relationship of the control system of the electric industrial vehicle according to the embodiment of the present invention. It is a flowchart shown.
  • the drive axle 130 is driven by receiving power from the battery 100 according to the control signal of the controller 110 .
  • a driving motor 120 for driving a hydraulic motor 140 driven by receiving power from the battery 100 according to a control signal from the control unit 110 , and a hydraulic motor driven by the hydraulic motor 140 .
  • a clutch 200 that includes a hydraulic pump 150 but connects the output of the hydraulic motor 140 to be transmitted to the drive axle 130 according to the required torque amount of the electric industrial vehicle, and the driving motor 120 is driven on When (On), hydraulic pressure is applied to release the brake, and it may be configured to further include a parking brake device 300 .
  • the hydraulic motor 140 and the hydraulic pump 150 are driven and operated to operate a lift, etc., but when the required torque is increased during driving and the required torque is greater than or equal to a set value, by the control signal of the control unit 110 As it is driven and operated to generate hydraulic pressure in the clutch 200 , the output of the hydraulic motor 140 may be transmitted to the drive axle 130 , and a detailed configuration and operation relationship thereof will be described later in detail.
  • the hydraulic motor 140 and the hydraulic pump 150 are driven and operated to operate a lift, etc., and are driven and operated by a control signal of the control unit 110 when the driving motor 120 is driven on and parked.
  • the parking brake may be released, and a detailed configuration and operation relationship thereof will be described later in detail.
  • control system of an electric industrial vehicle includes a hydraulic tank 160 for supplying stored fluid by driving and operation of the hydraulic motor 140 and the hydraulic pump 150 , and the hydraulic tank 160 .
  • an accumulator 220 that stores the fluid supplied from the set pressure at a set pressure
  • an opening/closing valve 210 that allows the fluid to be supplied from the hydraulic tank 160 to the accumulator 220 as it is opened and closed by a control signal from the controller 110 . It may be configured to further include a.
  • the cylinder 202 for operating the clutch 200 with the fluid stored in the accumulator 220 as the direction is changed by the control signal of the controller 110 . It may be configured to further include a first direction switching valve 230 to be supplied to.
  • control system of the electric industrial vehicle transfers the fluid stored in the accumulator 200 to the cylinder 302 of the parking brake device 300 as the direction is changed by the control signal of the controller 110 .
  • It may be configured to further include a second direction switching valve 310 to supply.
  • control system of the electric industrial vehicle includes a main control valve 152 that controls the fluid to be stored at a hydraulic pressure of a set pressure in the accumulator 220 and a hydraulic pressure in the accumulator 220 . It may be configured to further include a pressure sensor 170 .
  • the pressure sensor 170 drives and operates the hydraulic motor 140 and the hydraulic pump 150 when the hydraulic pressure in the accumulator 220 is less than or equal to the set pressure to supply the fluid in the hydraulic tank 160 to the accumulator 220 . function will be performed.
  • the traveling motor 120 is driven so that the output of the traveling motor 120 is transmitted to the drive axle 130, but high torque for starting and low speed of the industrial vehicle.
  • the control unit 110 drives the hydraulic motor 140 and the output of the hydraulic motor 140 is transmitted to the drive axle 130 to assist power. do it
  • the control unit 110 clutches the fluid in the accumulator 220 .
  • the output of the hydraulic motor 140 is transmitted to the drive axle 130 .
  • the accumulator 220 is a space in which the fluid is stored above a set pressure, and the hydraulic pump 150 is operated according to the driving of the hydraulic motor 140 to receive and store the fluid in the hydraulic tank 160 .
  • the fluid in the hydraulic tank 160 passes through the on-off valve 210 by the driving of the hydraulic motor 140 and the operation of the hydraulic pump 150 to the accumulator 220 . supply will be made with
  • the first check valve 212 is installed between the on-off valve 210 and the accumulator 220 so that the fluid moves only in the accumulator 220 direction after passing the on-off valve 210 .
  • the pressure of the fluid supplied to and stored in the accumulator 220 is preferably adjusted to maintain about 15 bar or so, and such adjustment of the set pressure may be controlled by the main control valve.
  • the accumulator 220 is connected to a pressure sensor 170 for sensing the pressure of the fluid therein, and when the sensed hydraulic pressure in the accumulator 220 is less than or equal to the set pressure, by transmitting a signal thereof to the control unit 110, The controller 110 may supply a fluid to the accumulator 220 .
  • the on/off valve 210 maintains a closed state so that the fluid is no longer supplied into the accumulator 220 .
  • the first directional selector valve 230 is opened so that the fluid in the accumulator 220 is supplied to the cylinder 202 to connect the clutch 200 .
  • the clutch 200 is connected by the pressure of the fluid supplied to the cylinder 202 so that the output of the hydraulic motor 140 is assisted by the drive axle 130 .
  • the hydraulic pump 150 supplies the fluid in the hydraulic tank 160 to the accumulator 220 at a pressure set to the on/off valve 210 again. to be opened, and at this time, the main control valve 152 controls the fluid pressure supplied to the accumulator 220 .
  • the second check valve 222 is also installed between the accumulator 220 and the first direction switching valve 230 so that the fluid moves only in the direction of the cylinder 202 from the accumulator 220 .
  • the control unit 110 changes the direction of the first directional selector valve 230, so that the fluid in the accumulator 220 is no longer supplied to the cylinder 202.
  • the connection of the clutch 200 is released.
  • the output of the hydraulic motor 140 is no longer transmitted to the drive axle 130 so that the driving of the electric industrial vehicle is made only by the output of the driving motor 120 .
  • the design freedom of the industrial vehicle is improved as a relatively small volume low or medium output driving motor 120 can be applied,
  • the cost associated with the production of the industrial vehicle is reduced, and a useful effect of increasing the power efficiency of the battery 100 may be provided.
  • a low or medium output driving motor 120 having a relatively small volume is applied, and only the output of the driving motor 120 is driven at medium speed/heavy load or higher.
  • a hydraulic motor ( 140) is simultaneously transmitted to the drive axle 130, so that the design freedom of the industrial vehicle is improved, the cost of industrial vehicle production is reduced, and the power efficiency of the battery 100 is increased.
  • control unit 110 supplies the fluid in the accumulator 220 to the cylinder 302 of the parking brake device 300 to release the parking brake.
  • the accumulator 220 is a space in which the fluid is stored above a set pressure, and the hydraulic pump 150 is operated according to the driving of the hydraulic motor 140 to receive and store the fluid in the hydraulic tank 160 .
  • the fluid in the hydraulic tank 160 passes through the on-off valve 210 by the driving of the hydraulic motor 140 and the operation of the hydraulic pump 150 to the accumulator 220 . supply will be made with
  • the first check valve 212 is installed between the on-off valve 210 and the accumulator 220 so that the fluid moves only in the accumulator 220 direction after passing the on-off valve 210 .
  • the pressure of the fluid supplied and stored in the accumulator 220 is preferably adjusted to maintain about 15 bar or so, and such adjustment of the set pressure may be controlled by the main control valve 152 .
  • the accumulator 220 is connected to a pressure sensor 170 for sensing the pressure of the fluid therein, and when the sensed hydraulic pressure in the accumulator 220 is less than or equal to the set pressure, by transmitting a signal thereof to the control unit 110, The controller 110 may supply a fluid to the accumulator 220 .
  • the on/off valve 210 maintains a closed state so that the fluid is no longer supplied into the accumulator 220 .
  • the hydraulic motor 140 is driven and the second directional selector valve 310 is opened to open the accumulator ( The fluid in 220 is supplied to the cylinder 302 of the parking brake device 300 so that the parking brake device 300 is released.
  • the parking brake device 300 may be released by the pressure of the fluid supplied to the cylinder 302 .
  • the hydraulic pump 150 supplies the fluid in the hydraulic tank 160 to the accumulator 220 at a set pressure. to be opened, and at this time, the main control valve 152 controls the fluid pressure supplied to the accumulator 220 .
  • the control unit 110 switches the direction of the second direction switching valve 310 so that the fluid in the accumulator 220 is no longer transferred to the cylinder 302 of the parking brake device 300 .
  • the parking brake device 300 applies the parking brake by the elastic restoring force of the elastic member. to lock it
  • the parking brake is locked or released by hydraulic pressure for operating a lift, etc. without installing a separate hydraulic line for only the parking brake.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The present invention relates to a control system for an electric type vehicle, the control system comprising: a driving motor that drives a drive axle as driven by receiving power according to a control signal of a control unit; a hydraulic motor that is driven by receiving the power according to the control signal of the control unit; a hydraulic pump that is operated by the driving of the hydraulic motor and supplies a fluid in a hydraulic tank; a clutch that connects or releases an output of the hydraulic motor to be transmitted to the drive axle according to an amount of torque required when an electric type vehicle is driven; and a parking brake device that locks or releases a parking brake by means of hydraulic pressure according to driving on or off of the driving motor.

Description

[규칙 제26조에 의한 보정 04.05.2021]　전동식 산업용 차량의 제어 시스템[Correction 04.05.2021 according to Rule 26]　Control system for electric industrial vehicles
본 발명은 전동식 산업용 차량의 제어 시스템에 관한 것으로서, 보다 상세하게는 전동식 산업용 차량의 주행 시 요구 토크에 따라 주행 모터 단독 또는 주행 모터와 유압 모터를 조합하여 요구성능 확보 및 성능 개선이 제공될 수 있도록 하고, 전동식 산업용 차량의 주행을 위한 시동 온(On) 시, 리프트 등의 장비를 작동시키기 위한 유압에 의해 주차브레이크 장치가 해제되도록 하는 전동식 산업용 차량의 제어 시스템에 관한 것이다.The present invention relates to a control system for an electric industrial vehicle, and more particularly, to ensure required performance and improve performance by combining a driving motor alone or a driving motor and a hydraulic motor according to the torque required during driving of the electric industrial vehicle. And, it relates to a control system of an electric industrial vehicle that releases a parking brake device by hydraulic pressure for operating equipment such as a lift when the engine is turned on for driving of an electric industrial vehicle.
일반적으로, 상용차, 지게차 및 휠 로더 등과 같은 건설장비 및 산업용 차량(이하, '산업용 차량'이라 함)은 동력원에 따라 엔진식 산업용 차량과 전동식 산업용 차량으로 구분된다.In general, construction equipment and industrial vehicles such as commercial vehicles, forklifts and wheel loaders (hereinafter referred to as 'industrial vehicles') are classified into engine-type industrial vehicles and electric industrial vehicles according to power sources.
이들 중, 실내에서는 공해 등의 이유로 인하여 대부분 전동식 산업용 차량이 사용되고 있으며, 이러한 전동식 산업용 차량은 차량을 주행시키기 위한 주행 모터와, 리프트 등을 구동시키기 위한 유압 모터 등의 동력장치를 갖추고 있다.Among them, electric industrial vehicles are mostly used indoors for reasons such as pollution, and these electric industrial vehicles are equipped with power devices such as a driving motor for driving the vehicle and a hydraulic motor for driving a lift.
도 1은 종래의 전동식 산업용 차량의 제어관계를 나타낸 블록도로서, 주행 모터(30)는 산업용 차량의 드라이브 액슬(40)에 장착되어 제어부(20)의 제어신호에 따라 배터리(10)로부터 전원을 공급받아 구동하여 드라이브 액슬(40)을 구동시킴으로써, 액슬 허브에 장착된 구동바퀴를 전후진 시키게 된다.1 is a block diagram showing a control relationship of a conventional electric industrial vehicle. The driving motor 30 is mounted on the drive axle 40 of the industrial vehicle and receives power from the battery 10 according to the control signal of the controller 20. By being supplied and driven to drive the drive axle 40, the driving wheel mounted on the axle hub is moved forward and backward.
또한, 유압 모터(50)는 제어부(20)의 제어신호에 따라 배터리(10)로부터 전원을 공급받아 구동하여 유압펌프(60)를 가동시킴으로써, 리프트 등의 장비가 유압에 의해 작동이 이루어지도록 하게 된다.In addition, the hydraulic motor 50 receives power from the battery 10 according to the control signal of the controller 20 and drives the hydraulic pump 60 to operate the hydraulic pump 60, so that equipment such as a lift is operated by hydraulic pressure. do.
따라서, 주행 모터(30)는 산업용 차량의 주행 시에만 구동하고, 유압 모터(50)는 리프트 등의 장비가 작동하는 경우에만 구동이 이루어지게 된다.Accordingly, the driving motor 30 is driven only when the industrial vehicle is driven, and the hydraulic motor 50 is driven only when equipment such as a lift is operated.
이 때, 전동식 산업용 차량은 요구되는 동력 성능을 만족시키기 위해서 내연기관(엔진)이 장착되는 엔진식 산업용 차량의 엔진 출력에 준하는 대용량의 고출력 주행 모터가 적용되고 있는데, 이는 산업용 차량의 발진과 저속 대응을 위한 높은 토크 요구 및 산업용 차량의 최고 속도 확보를 위한 고속 회전 요구에 대응하기 위함이다.At this time, in order to satisfy the required power performance, a high-capacity, high-output driving motor equivalent to the engine output of an engine-type industrial vehicle equipped with an internal combustion engine (engine) is applied to the electric industrial vehicle, which responds to the start and low speed of the industrial vehicle This is to respond to the high torque requirement for high-speed rotation and high-speed rotation to secure the highest speed of industrial vehicles.
이에, 종래의 전동식 산업용 차량은 고출력 주행 모터를 적용함에 따라 부피가 큰 주행 모터를 필요로 하게 됨으로써, 산업용 차량의 설계 자유도에 제약이 따르고, 전동식 산업용 차량 생산에 따른 원가가 상승하게 되며, 배터리의 전력효율이 저하되는 단점이 있었다.Accordingly, the conventional electric industrial vehicle requires a bulky driving motor as a high-output driving motor is applied, thereby limiting the design freedom of the industrial vehicle, increasing the cost of the electric industrial vehicle production, and increasing the cost of the battery. There was a disadvantage in that the power efficiency was lowered.
또한, 종래의 전동식 산업용 차량은, 주행 모터(30)의 구동 시에 주행이 이루어지게 됨으로써, 제동 시에는 주행 모터(30)의 회전 수를 줄이는 구조로 브레이크 시스템이 구비되어 있는바, 엔진식 산업용 차량과 같이 유압식 주차 브레이크 장치는 갖추지 않게 된다.In addition, the conventional electric industrial vehicle is provided with a brake system in a structure to reduce the number of revolutions of the traveling motor 30 during braking by being driven when the traveling motor 30 is driven, so that the engine type industrial vehicle is provided. It will not be equipped with a hydraulic parking brake system like a vehicle.
따라서, 전동식 산업용 차량이 정지된 상태에서 브레이크 상태를 유지시키기 위한 주차 브레이크 장치는, 별도의 유압 라인을 설치하여야 함으로써, 그 구조가 매우 복잡함은 물론 그에 따라 제작원가가 상승하게 되는 등의 문제점이 있었다.Therefore, the parking brake device for maintaining the brake state when the electric industrial vehicle is stopped has a problem that a separate hydraulic line must be installed, so that the structure is very complicated, and the manufacturing cost is increased accordingly. .
본 발명은 상기와 같은 제반 문제점에 착안하여 안출된 것으로서, 본 발명이 해결하고자 하는 기술적 과제는, 비교적 부피가 작은 저 또는 중출력 주행 모터를 적용하여 산업용 차량의 설계 자유도를 향상시키고, 산업용 차량 생산에 따른 원가를 절감시키며, 배터리의 전력효율을 높일 수 있는 전동식 산업용 차량의 제어 시스템을 제공하는 것이다.The present invention has been devised in view of the various problems described above, and the technical problem to be solved by the present invention is to improve the design freedom of an industrial vehicle by applying a low or medium-power driving motor having a relatively small volume, and to produce an industrial vehicle It is to provide a control system for an electric industrial vehicle that can reduce costs and increase battery power efficiency.
즉, 본 발명이 해결하고자 하는 기술적 과제는, 비교적 부피가 작은 저 또는 중출력 주행 모터를 적용하여, 중속/중부하 이상에서는 주행 모터의 출력만 드라이브 액슬로 전달되도록 하고, 산업용 차량의 발진과 저속 대응을 위한 높은 토크 요구 및 산업용 차량의 최고 속도 확보를 위한 고속 회전 요구 시에는 주행 모터와 더불어 리프트 등을 구동시키기 위한 유압 모터의 출력이 드라이브 액슬로 동시에 전달되도록 함으로써, 산업용 차량의 설계 자유도를 향상시키고, 산업용 차량 생산에 따른 원가를 절감시키며, 배터리의 전력효율을 높일 수 있는 전동식 산업용 차량의 제어 시스템을 제공하는 것이다.That is, the technical problem to be solved by the present invention is to apply a low or medium power traveling motor having a relatively small volume, so that only the output of the traveling motor is transmitted to the drive axle at medium speed/heavy load or higher, and starting and low speed of an industrial vehicle When a high torque is required for response and a high-speed rotation is required to secure the highest speed of an industrial vehicle, the output of the hydraulic motor for driving the lift and the driving motor is simultaneously transmitted to the drive axle, thereby improving the design freedom of industrial vehicles. It is to provide a control system for an electric industrial vehicle that can reduce the cost of industrial vehicle production and increase battery power efficiency.
또한, 본 발명이 해결하고자 하는 다른 기술적 과제는, 주차 브레이크만을 위한 별도의 유압 라인을 설치하지 않고, 리프트 등을 작동시키기 위한 유압에 의해 주차 브레이크가 잠금 또는 해제되도록 하는 전동식 산업용 차량의 주차 브레이크 시스템을 제공하는 것이다.In addition, another technical problem to be solved by the present invention is a parking brake system for an electric industrial vehicle that locks or releases the parking brake by hydraulic pressure for operating a lift, etc. without installing a separate hydraulic line for only the parking brake. is to provide
즉, 본 발명이 해결하고자 하는 기술적 과제는, 리프트 등을 작동시키기 위하여 구비되는 유압 라인을 이용하여 주차 브레이크가 잠금 또는 해제되도록 구성함으로써, 산업용 차량의 설계 자유도를 향상시키고, 산업용 차량 생산에 따른 원가를 절감시킬 수 있도록 하는 전동식 산업용 차량의 주차 브레이크 시스템을 제공하는 것이다.That is, the technical problem to be solved by the present invention is to improve the design freedom of the industrial vehicle by configuring the parking brake to be locked or released using a hydraulic line provided to operate a lift, etc., and to increase the cost of industrial vehicle production It is to provide a parking brake system for an electric industrial vehicle that can reduce
상기 과제를 해결하기 위한 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템은, 제어부의 제어신호에 의해 전원을 공급받아 구동함에 따라 드라이브 액슬을 구동시키는 주행 모터; 상기 제어부의 제어신호에 의해 전원을 공급받아 구동되는 유압 모터; 상기 유압 모터의 구동에 의해 가동되어 유압 탱크 내의 유체를 공급하는 유압 펌프; 상기 유압 모터의 출력을 전동식 산업용 차량의 주행 시 요구되는 토크량에 따라 상기 드라이브 액슬로 전달되도록 연결 또는 해제시키는 클러치; 및 상기 주행 모터의 구동 온 또는 오프에 따라 유압에 의해 주차 브레이크를 잠금 또는 해제하는 주차 브레이크 장치를 포함하는 구성으로 이루어질 수 있다.A control system for an electric industrial vehicle according to an embodiment of the present invention for solving the above problems includes: a driving motor for driving a drive axle as it is driven by receiving power according to a control signal from a control unit; a hydraulic motor driven by receiving power according to a control signal of the control unit; a hydraulic pump operated by driving the hydraulic motor to supply a fluid in the hydraulic tank; a clutch for connecting or releasing the output of the hydraulic motor to be transmitted to the drive axle according to the amount of torque required when the electric industrial vehicle is driven; and a parking brake device for locking or releasing the parking brake by hydraulic pressure according to driving of the driving motor on or off.
또한, 상기 유압 펌프의 가동에 의해 설정 압력의 유체를 저장하는 어큐뮬레이터와, 상기 어큐뮬레이터에 설정 압력으로 유체가 저장되도록 제어하는 메인 콘트롤 밸브와, 상기 유압 펌프와 상기 어큐뮬레이터 사이에 배치되어 상기 어큐뮬레이터로 유체가 공급되도록 하는 개폐밸브를 더 포함하는 구성으로 이루어질 수 있다.In addition, an accumulator for storing a fluid of a set pressure by operation of the hydraulic pump, a main control valve controlling the fluid to be stored at a set pressure in the accumulator, and the hydraulic pump and the accumulator are disposed between the accumulator and the fluid to the accumulator It may be configured to further include an on/off valve for supplying.
이 때, 상기 제어부의 제어신호에 의해 상기 어큐뮬레이터에 저장된 유체를 상기 클러치의 실린더로 공급하거나 또는 상기 클러치의 실린더 내의 유체를 상기 유압 탱크로 리턴시키도록 하는 제1 방향전환밸브를 더 포함하는 구성으로 이루어질 수 있다.At this time, according to the control signal of the control unit, the configuration further includes a first directional selector valve configured to supply the fluid stored in the accumulator to the cylinder of the clutch or return the fluid in the cylinder of the clutch to the hydraulic tank. can be done
또한, 상기 제어부의 제어신호에 의해 상기 어큐뮬레이터에 저장된 유체를 상기 주차 브레이크 장치의 실린더로 공급하거나 또는 상기 주차 브레이크 장치의 실린더 내의 유체를 상기 유압 탱크로 리턴시키도록 하는 제2 방향전환밸브를 더 포함하는 구성으로 이루어질 수 있다.In addition, a second directional selector valve configured to supply the fluid stored in the accumulator to the cylinder of the parking brake device or return the fluid in the cylinder of the parking brake device to the hydraulic tank according to a control signal from the control unit. It may consist of
또한, 상기 어큐뮬레이터 내의 압력을 측정하기 위한 압력 센서를 더 포함하고, 상기 압력 센서에 의한 어큐뮬레이터 내의 압력 측정 값이 설정 범위 이내인 경우, 상기 제어부는 상기 유압 펌프에 가동 신호를 인가하여 상기 어큐뮬레이터로 유체를 공급함에 따라 설정 압력을 유지하도록 할 수 있다.In addition, the apparatus further includes a pressure sensor for measuring the pressure in the accumulator, and when the pressure measurement value in the accumulator by the pressure sensor is within a set range, the control unit applies an operation signal to the hydraulic pump to flow the fluid into the accumulator It is possible to maintain the set pressure by supplying the
본 발명의 기타 구체적인 사항들은 상세한 설명 및 도면들에 포함되어 있다.Other specific details of the invention are included in the detailed description and drawings.
본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템에 의하면, 비교적 부피가 작은 저 또는 중출력 주행 모터가 적용될 수 있음에 따라 산업용 차량의 설계 자유도가 향상되고, 산업용 차량 생산에 따른 원가가 절감되며, 배터리의 전력효율이 높아지게 되는 유용한 효과가 제공될 수 있다.According to the control system of the electric industrial vehicle according to the embodiment of the present invention, as a low or medium power driving motor having a relatively small volume can be applied, the design freedom of the industrial vehicle is improved, the cost of industrial vehicle production is reduced, and the , a useful effect of increasing the power efficiency of the battery may be provided.
즉, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템에 의하면, 비교적 부피가 작은 저 또는 중출력 주행 모터가 적용되어, 중속/중부하 이상에서는 주행 모터의 출력만 드라이브 액슬로 전달되고, 산업용 차량의 발진과 저속 대응을 위한 높은 토크 요구 및 산업용 차량의 최고 속도 확보를 위한 고속 회전 요구 시에는 주행 모터와 더불어 리프트 등을 구동시키기 위한 유압 모터의 출력이 드라이브 액슬로 동시에 전달됨으로써, 산업용 차량의 설계 자유도가 향상되고, 산업용 차량 생산에 따른 원가가 절감되며, 배터리의 전력효율이 높아지게 되는 매우 유용한 효과가 제공될 수 있다.That is, according to the control system of the electric industrial vehicle according to the embodiment of the present invention, a low or medium output driving motor having a relatively small volume is applied, and only the output of the driving motor is transmitted to the drive axle at medium speed/heavy load or higher, When high torque is required to respond to vehicle start and low speed and high-speed rotation is required to secure the highest speed of an industrial vehicle, the output of the hydraulic motor for driving the lift and the traveling motor is simultaneously transmitted to the drive axle, A very useful effect of improving the design freedom, reducing the cost of industrial vehicle production, and increasing the power efficiency of the battery can be provided.
또한, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템에 의하면, 주차 브레이크만을 위한 별도의 유압 라인을 설치하지 않고, 리프트 등을 작동시키기 위한 유압에 의해 주차 브레이크가 잠금 또는 해제되도록 구성됨으로써, 산업용 차량의 설계 자유도가 향상되고, 산업용 차량 생산에 따른 원가가 절감되는 등의 유용한 효과가 제공될 수 있다.In addition, according to the control system of the electric industrial vehicle according to the embodiment of the present invention, the parking brake is configured to be locked or released by hydraulic pressure for operating a lift, etc. without installing a separate hydraulic line for only the parking brake, It is possible to provide useful effects such as improved design freedom of the industrial vehicle and reduction in cost according to the production of the industrial vehicle.
본 발명에 따른 효과는 이상에서 예시된 내용에 의해 제한되지 않으며, 더욱 다양한 효과들이 본 명세서 내에 포함되어 있다.The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.
도 1은 종래의 전동식 산업용 차량의 제어관계를 나타낸 블록도.1 is a block diagram showing a control relationship of a conventional electric industrial vehicle.
도 2는 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템의 제어관계를 나타낸 블록도.2 is a block diagram illustrating a control relationship of a control system for an electric industrial vehicle according to an embodiment of the present invention.
도 3은 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템 작동관계를 나타낸 블록도.3 is a block diagram illustrating an operation relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention.
도 4 내지 도 9는 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템 작동관계를 나타낸 계통도.4 to 9 are schematic diagrams showing the operation relationship of the control system of the electric industrial vehicle according to an embodiment of the present invention.
도 10 내지 도 12는 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템 작동관계를 나타낸 순서도.10 to 12 are flowcharts illustrating an operation relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention.
이하, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템을 첨부된 예시도면에 의거하여 상세히 설명한다.Hereinafter, a control system for an electric industrial vehicle according to an embodiment of the present invention will be described in detail based on the accompanying exemplary drawings.
도 2는 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템의 제어관계를 나타낸 블록도이고, 도 3은 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템 작동관계를 나타낸 블록도이다.2 is a block diagram illustrating a control relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention, and FIG. 3 is a block diagram illustrating an operation relationship of a control system of an electric industrial vehicle according to an embodiment of the present invention.
또한, 도 4 내지 도 9는 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템 작동관계를 나타낸 계통도이고, 도 10 내지 도 12는 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템 작동관계를 나타낸 순서도이다.In addition, FIGS. 4 to 9 are schematic diagrams showing the operation relationship of the control system of the electric industrial vehicle according to the embodiment of the present invention, and FIGS. 10 to 12 are the operation relationship of the control system of the electric industrial vehicle according to the embodiment of the present invention. It is a flowchart shown.
먼저, 도 2에 도시된 바와 같이, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템은, 제어부(110)의 제어 신호에 의해 배터리(100)로부터 전원을 공급받아 구동함에 따라 드라이브 액슬(130)을 구동시키는 주행 모터(120)와, 제어부(110)의 제어 신호에 의해 배터리(100)로부터 전원을 공급받아 구동되는 유압 모터(140)와, 이 유압 모터(140)의 구동에 의해 가동되는 유압 펌프(150)를 포함하되, 전동식 산업용 차량의 요구 토크량에 따라 유압 모터(140)의 출력을 드라이브 액슬(130)로 전달되도록 연결하는 클러치(200)와, 주행 모터(120)의 구동 온(On) 시, 유압이 작용하여 브레이크가 해제되도록 하는 주차 브레이크 장치(300)를 더 포함하는 구성으로 이루어질 수 있다.First, as shown in FIG. 2 , in the control system of an electric industrial vehicle according to an embodiment of the present invention, the drive axle 130 is driven by receiving power from the battery 100 according to the control signal of the controller 110 . ), a driving motor 120 for driving, a hydraulic motor 140 driven by receiving power from the battery 100 according to a control signal from the control unit 110 , and a hydraulic motor driven by the hydraulic motor 140 . A clutch 200 that includes a hydraulic pump 150 but connects the output of the hydraulic motor 140 to be transmitted to the drive axle 130 according to the required torque amount of the electric industrial vehicle, and the driving motor 120 is driven on When (On), hydraulic pressure is applied to release the brake, and it may be configured to further include a parking brake device 300 .
여기서, 유압 모터(140) 및 유압 펌프(150)는 리프트 등을 작동시키기 위하여 구동 및 가동이 이루어지되, 주행 시 요구 토크가 증가되어 요구 토크가 설정 치 이상인 경우 제어부(110)의 제어신호에 의해 구동 및 가동되어 클러치(200)에 유압을 발생시킴에 따라 유압 모터(140)의 출력이 드라이브 액슬(130)로 전달되도록 할 수 있는데, 이의 세부적인 구성 및 작동관계는 후에 상세히 설명하기로 한다.Here, the hydraulic motor 140 and the hydraulic pump 150 are driven and operated to operate a lift, etc., but when the required torque is increased during driving and the required torque is greater than or equal to a set value, by the control signal of the control unit 110 As it is driven and operated to generate hydraulic pressure in the clutch 200 , the output of the hydraulic motor 140 may be transmitted to the drive axle 130 , and a detailed configuration and operation relationship thereof will be described later in detail.
그리고, 유압 모터(140) 및 유압 펌프(150)는 리프트 등을 작동시키기 위하여 구동 및 가동이 이루어지되, 주행 모터(120)의 구동 온 시 제어부(110)의 제어신호에 의해 구동 및 가동되어 주차 브레이크 장치(300)에 유압을 발생시킴에 따라 주차 브레이크가 해제되도록 할 수 있는데, 이에 대한 세부적인 구성 및 작동관계도 후에 상세히 설명하기로 한다.In addition, the hydraulic motor 140 and the hydraulic pump 150 are driven and operated to operate a lift, etc., and are driven and operated by a control signal of the control unit 110 when the driving motor 120 is driven on and parked. As hydraulic pressure is generated in the brake device 300, the parking brake may be released, and a detailed configuration and operation relationship thereof will be described later in detail.
또한, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템은, 유압 모터(140) 및 유압 펌프(150)의 구동 및 가동에 의해 저장된 유체를 공급하는 유압 탱크(160)와, 유압 탱크(160)로부터 공급되는 유체를 설정 압력으로 저장하는 어큐뮬레이터(220)와, 제어부(110)의 제어신호에 의해 개폐됨에 따라 유압 탱크(160)로부터 유체가 어큐뮬레이터(220)로 공급되도록 하는 개폐밸브(210)를 더 포함하는 구성으로 이루어질 수 있다.In addition, the control system of an electric industrial vehicle according to an embodiment of the present invention includes a hydraulic tank 160 for supplying stored fluid by driving and operation of the hydraulic motor 140 and the hydraulic pump 150 , and the hydraulic tank 160 . ) an accumulator 220 that stores the fluid supplied from the set pressure at a set pressure, and an opening/closing valve 210 that allows the fluid to be supplied from the hydraulic tank 160 to the accumulator 220 as it is opened and closed by a control signal from the controller 110 . It may be configured to further include a.
또한, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템은, 제어부(110)의 제어신호에 의해 방향전환됨에 따라 어큐뮬레이터(220)에 저장된 유체를 클러치(200)를 작동시키기 위한 실린더(202)에 공급되도록 하는 제1 방향전환밸브(230)를 더 포함하는 구성으로 이루어질 수 있다.In addition, in the control system of the electric industrial vehicle according to the embodiment of the present invention, the cylinder 202 for operating the clutch 200 with the fluid stored in the accumulator 220 as the direction is changed by the control signal of the controller 110 . It may be configured to further include a first direction switching valve 230 to be supplied to.
또한, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템은, 제어부(110)의 제어신호에 의해 방향전환됨에 따라 어큐뮬레이터(200)에 저장된 유체를 주차 브레이크 장치(300)의 실린더(302)에 공급하도록 하는 제2 방향전환밸브(310)를 더 포함하는 구성으로 이루어질 수 있다.In addition, the control system of the electric industrial vehicle according to an embodiment of the present invention transfers the fluid stored in the accumulator 200 to the cylinder 302 of the parking brake device 300 as the direction is changed by the control signal of the controller 110 . It may be configured to further include a second direction switching valve 310 to supply.
또한, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템은, 어큐뮬레이터(220)에 설정 압력의 유압으로 유체가 저장되도록 제어하는 메인 콘트롤 밸브(152)와, 어큐뮬레이터(220) 내의 유압을 감지하는 압력 센서(170)를 더 포함하는 구성으로 이루어질 수 있다.In addition, the control system of the electric industrial vehicle according to an embodiment of the present invention includes a main control valve 152 that controls the fluid to be stored at a hydraulic pressure of a set pressure in the accumulator 220 and a hydraulic pressure in the accumulator 220 . It may be configured to further include a pressure sensor 170 .
여기서, 압력 센서(170)는 어큐뮬레이터(220) 내의 유압이 설정 압력 이하인 경우 유압 모터(140) 및 유압 펌프(150)를 구동 및 가동시켜서 유압 탱크(160) 내의 유체를 어큐뮬레이터(220)로 공급하도록 하는 기능을 수행하게 된다.Here, the pressure sensor 170 drives and operates the hydraulic motor 140 and the hydraulic pump 150 when the hydraulic pressure in the accumulator 220 is less than or equal to the set pressure to supply the fluid in the hydraulic tank 160 to the accumulator 220 . function will be performed.
상기와 같은 구성으로 이루어질 수 있는 전동식 산업용 차량의 제어 시스템의 작동관계를 설명하면 다음과 같다.The operation relationship of the control system of the electric industrial vehicle, which may be configured as described above, will be described as follows.
<파워 어시스트 모드><Power Assist Mode>
먼저, 전동식 산업용 차량을 시동 온(On)시킨 상태에서 엑셀러레이터(Accelerator)를 밟아 주행하는 경우, 저 출력 또는 중 출력 단계에서는 주행 모터(120)만 구동하여 주행 모터(120)의 출력이 드라이브 액슬(130)로 전달되도록 함으로써, 주행이 이루어지도록 한다.First, when driving by stepping on the accelerator while the electric industrial vehicle is started, only the driving motor 120 is driven in the low or medium output stage so that the output of the driving motor 120 is changed to the drive axle ( 130), so that the driving is made.
이 때, 전동식 산업용 차량이 중속 및 중부하 이상에서는 주행 모터(120)가 구동하여 주행 모터(120)의 출력이 드라이브 액슬(130)로 전달되도록 하되, 산업용 차량의 발진과 저속 대응을 위한 높은 토크 요구 및 산업용 차량의 최고 속도 확보를 위한 고속 회전 요구 시에는, 제어부(110)가 유압 모터(140)를 구동시키고 이 유압 모터(140)의 출력이 드라이브 액슬(130)로 전달되도록 하여 파워를 어시스트하도록 한다.At this time, when the electric industrial vehicle has a medium speed and a heavy load or higher, the traveling motor 120 is driven so that the output of the traveling motor 120 is transmitted to the drive axle 130, but high torque for starting and low speed of the industrial vehicle When a high-speed rotation is requested to secure the maximum speed of the industrial vehicle, the control unit 110 drives the hydraulic motor 140 and the output of the hydraulic motor 140 is transmitted to the drive axle 130 to assist power. do it
즉, 제어부(110)가 유압 모터(140)를 구동시킴에 따라 이 유압 모터(140)의 출력이 드라이브 액슬(130)로 전달되도록 하기 위해서는, 제어부(110)가 어큐뮬레이터(220) 내의 유체를 클러치(200)의 실린더(202)로 공급하여 클러치(200)를 접속시킴에 따라 유압 모터(140)의 출력이 드라이브 액슬(130)로 전달되도록 한다.That is, in order to transmit the output of the hydraulic motor 140 to the drive axle 130 as the control unit 110 drives the hydraulic motor 140 , the control unit 110 clutches the fluid in the accumulator 220 . By supplying to the cylinder 202 of 200 and connecting the clutch 200 , the output of the hydraulic motor 140 is transmitted to the drive axle 130 .
여기서, 어큐뮬레이터(220)는 설정 압력 이상으로 유체가 저장되는 공간으로서, 유압 모터(140)의 구동에 따른 유압 펌프(150)의 가동으로 유압 탱크(160) 내의 유체를 공급받아 저장될 수 있다.Here, the accumulator 220 is a space in which the fluid is stored above a set pressure, and the hydraulic pump 150 is operated according to the driving of the hydraulic motor 140 to receive and store the fluid in the hydraulic tank 160 .
즉, 도 4 및 도 10에 도시된 바와 같이, 유압 모터(140)의 구동과 유압 펌프(150)의 가동에 의해 유압 탱크(160) 내의 유체는 개폐밸브(210)를 통과하여 어큐뮬레이터(220)로 공급이 이루어지게 된다.That is, as shown in FIGS. 4 and 10 , the fluid in the hydraulic tank 160 passes through the on-off valve 210 by the driving of the hydraulic motor 140 and the operation of the hydraulic pump 150 to the accumulator 220 . supply will be made with
이 때, 개폐밸브(210)와 어큐뮬레이터(220) 사이에는 제1 체크밸브(212)가 설치되어 유체가 개폐밸브(210)를 통과한 후 어큐뮬레이터(220) 방향으로만 이동되도록 하는 것이 바람직하다.At this time, it is preferable that the first check valve 212 is installed between the on-off valve 210 and the accumulator 220 so that the fluid moves only in the accumulator 220 direction after passing the on-off valve 210 .
이와 같이, 어큐뮬레이터(220) 내로 공급되어 저장되는 유체의 압력은 대략 15bar 내외를 유지하도록 조절하는 것이 바람직한데, 이와 같은 설정 압력의 조절은 메인 콘트롤 벨브에 의해 조절될 수 있다.As such, the pressure of the fluid supplied to and stored in the accumulator 220 is preferably adjusted to maintain about 15 bar or so, and such adjustment of the set pressure may be controlled by the main control valve.
한편, 어큐뮬레이터(220)는 그 내부의 유체 압력을 감지하기 위한 압력 센서(170)와 연결되며, 어큐뮬레이터(220) 내의 감지된 유압이 설정 압력 이하인 경우, 이의 신호를 제어부(110)로 송신함으로써, 제어부(110)가 어큐뮬레이터(220)에 유체를 공급하도록 할 수 있다.On the other hand, the accumulator 220 is connected to a pressure sensor 170 for sensing the pressure of the fluid therein, and when the sensed hydraulic pressure in the accumulator 220 is less than or equal to the set pressure, by transmitting a signal thereof to the control unit 110, The controller 110 may supply a fluid to the accumulator 220 .
즉, 도 5에 도시된 바와 같이, 어큐뮬레이터(220)에 공급된 유체의 압력이 설정 압력 이상인 경우, 개폐밸브(210)는 폐쇄된 상태를 유지하여 더 이상 어큐뮬레이터(220) 내로 유체공급이 이루어지지 않도록 하되, 상기한 바와 같이, 전동식 산업용 차량의 요구 토크가 설정 값 이상이어서 유압 모터(140)의 출력을 드라이브 액슬(130)로 어시스트 하고자 하는 경우, 도 11에 도시된 바와 같이, 유압 모터(140)를 구동시킴과 아울러 제1 방향전환밸브(230)를 개방시켜서 어큐뮬레이터(220) 내의 유체가 실린더(202)로 공급되도록 하여 클러치(200)를 접속시키도록 한다.That is, as shown in FIG. 5 , when the pressure of the fluid supplied to the accumulator 220 is equal to or greater than the set pressure, the on/off valve 210 maintains a closed state so that the fluid is no longer supplied into the accumulator 220 . However, as described above, in the case where the output of the hydraulic motor 140 is assisted by the drive axle 130 because the required torque of the electric industrial vehicle is greater than or equal to the set value, as shown in FIG. 11 , the hydraulic motor 140 ), the first directional selector valve 230 is opened so that the fluid in the accumulator 220 is supplied to the cylinder 202 to connect the clutch 200 .
따라서, 실린더(202)에 공급된 유체의 압력에 의해 클러치(200)가 접속되어 유압 모터(140)의 출력이 드라이브 액슬(130)로 어시스트 되도록 하면 된다.Accordingly, the clutch 200 is connected by the pressure of the fluid supplied to the cylinder 202 so that the output of the hydraulic motor 140 is assisted by the drive axle 130 .
이와 같이, 어큐뮬레이터(220) 내의 유체가 실린더(202)로 공급됨에 따라 유압 펌프(150)는 유압 탱크(160) 내의 유체를 어큐뮬레이터(220)로 설정된 압력으로 공급시키기 위하여 개폐밸브(210)는 다시 개방되도록 하며, 이 때 메인 콘트롤 밸브(152)는 어큐뮬레이터(220)로 공급되는 유체 압력을 제어하게 된다.As such, as the fluid in the accumulator 220 is supplied to the cylinder 202 , the hydraulic pump 150 supplies the fluid in the hydraulic tank 160 to the accumulator 220 at a pressure set to the on/off valve 210 again. to be opened, and at this time, the main control valve 152 controls the fluid pressure supplied to the accumulator 220 .
참고로, 어큐뮬레이터(220)와 제1 방향전환밸브(230) 사이에도 유체가 어큐뮬레이터(220)에서 실린더(202) 방향으로만 이동하도록 하는 제2 체크밸브(222)가 설치되는 것이 바람직하다.For reference, it is preferable that the second check valve 222 is also installed between the accumulator 220 and the first direction switching valve 230 so that the fluid moves only in the direction of the cylinder 202 from the accumulator 220 .
한편, 전동식 산업용 차량의 요구 토크가 설정 값 이하로 되면, 제어부(110)는 제1 방향전환밸브(230)의 방향을 전환시킴으로써, 어큐뮬레이터(220) 내의 유체가 더 이상 실린더(202)로 공급되지 않도록 하고, 실린더(202) 내의 유체가 유압 탱크(160)로 리턴되도록 하여 실린더(202)에 대한 압력을 해제시킴에 따라 클러치(200)의 접속을 해제시키도록 한다.On the other hand, when the required torque of the electric industrial vehicle is less than or equal to the set value, the control unit 110 changes the direction of the first directional selector valve 230, so that the fluid in the accumulator 220 is no longer supplied to the cylinder 202. In order to release the pressure on the cylinder 202 by allowing the fluid in the cylinder 202 to return to the hydraulic tank 160, the connection of the clutch 200 is released.
따라서, 유압 모터(140)의 출력은 더 이상 드라이브 액슬(130)로 전달되지 않도록 하여 주행 모터(120)의 출력에 의해서만 전동식 산업용 차량의 주행이 이루어지도록 하면 된다.Therefore, the output of the hydraulic motor 140 is no longer transmitted to the drive axle 130 so that the driving of the electric industrial vehicle is made only by the output of the driving motor 120 .
이상에서 설명한 바와 같이, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템에 의하면, 비교적 부피가 작은 저 또는 중출력 주행 모터(120)가 적용될 수 있음에 따라 산업용 차량의 설계 자유도가 향상되고, 산업용 차량 생산에 따른 원가가 절감되며, 배터리(100)의 전력효율이 높아지게 되는 유용한 효과가 제공될 수 있다.As described above, according to the control system of the electric industrial vehicle according to the embodiment of the present invention, the design freedom of the industrial vehicle is improved as a relatively small volume low or medium output driving motor 120 can be applied, The cost associated with the production of the industrial vehicle is reduced, and a useful effect of increasing the power efficiency of the battery 100 may be provided.
즉, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템에 의하면, 비교적 부피가 작은 저 또는 중출력 주행 모터(120)가 적용되어, 중속/중부하 이상에서는 주행 모터(120)의 출력만 드라이브 액슬(130)로 전달되고, 산업용 차량의 발진과 저속 대응을 위한 높은 토크 요구 및 산업용 차량의 최고 속도 확보를 위한 고속 회전 요구 시에는 주행 모터(120)와 더불어 리프트 등을 구동시키기 위한 유압 모터(140)의 출력이 드라이브 액슬(130)로 동시에 전달됨으로써, 산업용 차량의 설계 자유도가 향상되고, 산업용 차량 생산에 따른 원가가 절감되며, 배터리(100)의 전력효율이 높아지게 되는 매우 유용한 효과가 제공될 수 있다.That is, according to the control system of the electric industrial vehicle according to the embodiment of the present invention, a low or medium output driving motor 120 having a relatively small volume is applied, and only the output of the driving motor 120 is driven at medium speed/heavy load or higher. A hydraulic motor ( 140) is simultaneously transmitted to the drive axle 130, so that the design freedom of the industrial vehicle is improved, the cost of industrial vehicle production is reduced, and the power efficiency of the battery 100 is increased. can
<주차 브레이크 해제 모드><Parking brake release mode>
한편, 전동식 산업용 차량을 시동 오프(Off)시킴에 따라 주행 모터(130)가 구동 오프된 상태에서는, 주차 브레이크 장치(300)의 실린더(302)에 구비되는 탄성부재에 의해 구동 휠을 잠금시킨 상태가 된다.On the other hand, in a state in which the driving motor 130 is driven off as the electric industrial vehicle is started off, the driving wheel is locked by the elastic member provided in the cylinder 302 of the parking brake device 300 . becomes
이 상태에서 전동식 산업용 차량을 시동 온(On)시킴에 따라 주행 모터(130)가 구동 온되는 상태에서는, 주차 브레이크 장치(300)의 실린더(302)에 유체를 공급하여 구동 휠에 대한 잠금을 해제시켜서, 결국 주차 브레이크를 해제시키게 된다.In this state, when the driving motor 130 is driven as the electric industrial vehicle is started on, the fluid is supplied to the cylinder 302 of the parking brake device 300 to release the lock on the driving wheel. This will eventually release the parking brake.
즉, 제어부(110)가 어큐뮬레이터(220) 내의 유체를 주차 브레이크 장치(300)의 실린더(302)로 공급하여 주차 브레이크를 해제시키게 된다.That is, the control unit 110 supplies the fluid in the accumulator 220 to the cylinder 302 of the parking brake device 300 to release the parking brake.
여기서, 어큐뮬레이터(220)는 설정 압력 이상으로 유체가 저장되는 공간으로서, 유압 모터(140)의 구동에 따른 유압 펌프(150)의 가동으로 유압 탱크(160) 내의 유체를 공급받아 저장될 수 있다.Here, the accumulator 220 is a space in which the fluid is stored above a set pressure, and the hydraulic pump 150 is operated according to the driving of the hydraulic motor 140 to receive and store the fluid in the hydraulic tank 160 .
즉, 도 7 및 도 10에 도시된 바와 같이, 유압 모터(140)의 구동과 유압 펌프(150)의 가동에 의해 유압 탱크(160) 내의 유체는 개폐밸브(210)를 통과하여 어큐뮬레이터(220)로 공급이 이루어지게 된다.That is, as shown in FIGS. 7 and 10 , the fluid in the hydraulic tank 160 passes through the on-off valve 210 by the driving of the hydraulic motor 140 and the operation of the hydraulic pump 150 to the accumulator 220 . supply will be made with
이 때, 개폐밸브(210)와 어큐뮬레이터(220) 사이에는 제1 체크밸브(212)가 설치되어 유체가 개폐밸브(210)를 통과한 후 어큐뮬레이터(220) 방향으로만 이동되도록 하는 것이 바람직하다.At this time, it is preferable that the first check valve 212 is installed between the on-off valve 210 and the accumulator 220 so that the fluid moves only in the accumulator 220 direction after passing the on-off valve 210 .
이와 같이, 어큐뮬레이터(220) 내로 공급되어 저장되는 유체의 압력은 대략 15bar 내외를 유지하도록 조절하는 것이 바람직한데, 이와 같은 설정 압력의 조절은 메인 콘트롤 벨브(152)에 의해 조절될 수 있다.As such, the pressure of the fluid supplied and stored in the accumulator 220 is preferably adjusted to maintain about 15 bar or so, and such adjustment of the set pressure may be controlled by the main control valve 152 .
한편, 어큐뮬레이터(220)는 그 내부의 유체 압력을 감지하기 위한 압력 센서(170)와 연결되며, 어큐뮬레이터(220) 내의 감지된 유압이 설정 압력 이하인 경우, 이의 신호를 제어부(110)로 송신함으로써, 제어부(110)가 어큐뮬레이터(220)에 유체를 공급하도록 할 수 있다.On the other hand, the accumulator 220 is connected to a pressure sensor 170 for sensing the pressure of the fluid therein, and when the sensed hydraulic pressure in the accumulator 220 is less than or equal to the set pressure, by transmitting a signal thereof to the control unit 110, The controller 110 may supply a fluid to the accumulator 220 .
즉, 도 8에 도시된 바와 같이, 어큐뮬레이터(220)에 공급된 유체의 압력이 설정 압력 이상인 경우, 개폐밸브(210)는 폐쇄된 상태를 유지하여 더 이상 어큐뮬레이터(220) 내로 유체공급이 이루어지지 않도록 하되, 상기한 바와 같이, 전동식 산업용 차량의 시동 온 시, 도 9 및 도 12에 도시된 바와 같이, 유압 모터(140)를 구동시킴과 아울러 제2 방향전환밸브(310)를 개방시켜서 어큐뮬레이터(220) 내의 유체가 주차 브레이크 장치(300)의 실린더(302)로 공급되도록 하여 주차 브레이크 장치(300)가 해제되도록 한다.That is, as shown in FIG. 8 , when the pressure of the fluid supplied to the accumulator 220 is equal to or greater than the set pressure, the on/off valve 210 maintains a closed state so that the fluid is no longer supplied into the accumulator 220 . However, as described above, when the electric industrial vehicle is started on, as shown in FIGS. 9 and 12, the hydraulic motor 140 is driven and the second directional selector valve 310 is opened to open the accumulator ( The fluid in 220 is supplied to the cylinder 302 of the parking brake device 300 so that the parking brake device 300 is released.
따라서, 실린더(302)에 공급된 유체의 압력에 의해 주차 브레이크 장치(300)가 해제될 수 있다.Accordingly, the parking brake device 300 may be released by the pressure of the fluid supplied to the cylinder 302 .
이와 같이, 어큐뮬레이터(220) 내의 유체가 실린더(302)로 공급됨에 따라 유압 펌프(150)는 유압 탱크(160) 내의 유체를 어큐뮬레이터(220)로 설정된 압력으로 공급시키기 위하여 개폐밸브(210)는 다시 개방되도록 하며, 이 때 메인 콘트롤 밸브(152)는 어큐뮬레이터(220)로 공급되는 유체 압력을 제어하게 된다.In this way, as the fluid in the accumulator 220 is supplied to the cylinder 302 , the hydraulic pump 150 supplies the fluid in the hydraulic tank 160 to the accumulator 220 at a set pressure. to be opened, and at this time, the main control valve 152 controls the fluid pressure supplied to the accumulator 220 .
참고로, 어큐뮬레이터(220)와 제2 방향전환밸브(310) 사이에도 유체가 어큐뮬레이터(220)에서 주차 브레이크 장치(300)의 실린더(302) 방향으로만 이동하도록 하는 제2 체크밸브(222)가 설치되는 것이 바람직하다.For reference, there is also a second check valve 222 between the accumulator 220 and the second direction switching valve 310 so that the fluid moves only in the direction of the cylinder 302 of the parking brake device 300 from the accumulator 220 . It is preferable to install
한편, 전동식 산업용 차량를 시동 오프시키게 되면, 제어부(110)는 제2 방향전환밸브(310)의 방향을 전환시킴으로써, 어큐뮬레이터(220) 내의 유체가 더 이상 주차 브레이크 장치(300)의 실린더(302)로 공급되지 않도록 하고, 실린더(302) 내의 유체가 유압 탱크(160)로 리턴되도록 하여 실린더(302)에 대한 압력을 해제시킴에 따라 주차 브레이크 장치(300)는 탄성부재의 탄성 복원력에 의해 주차 브레이크를 잠금시키도록 한다.On the other hand, when the electric industrial vehicle is started off, the control unit 110 switches the direction of the second direction switching valve 310 so that the fluid in the accumulator 220 is no longer transferred to the cylinder 302 of the parking brake device 300 . As the pressure on the cylinder 302 is released by preventing the supply and allowing the fluid in the cylinder 302 to return to the hydraulic tank 160, the parking brake device 300 applies the parking brake by the elastic restoring force of the elastic member. to lock it
이상에서 설명한 바와 같이, 본 발명의 실시 예에 따른 전동식 산업용 차량의 제어 시스템에 의하면, 주차 브레이크만을 위한 별도의 유압 라인을 설치하지 않고, 리프트 등을 작동시키기 위한 유압에 의해 주차 브레이크가 잠금 또는 해제되도록 구성됨으로써, 산업용 차량의 설계 자유도가 향상되고, 산업용 차량 생산에 따른 원가가 절감되는 등의 유용한 효과가 제공될 수 있다.As described above, according to the control system of the electric industrial vehicle according to an embodiment of the present invention, the parking brake is locked or released by hydraulic pressure for operating a lift, etc. without installing a separate hydraulic line for only the parking brake. By being configured so as to be possible, useful effects such as improved design freedom of the industrial vehicle and reduction of costs associated with industrial vehicle production can be provided.

Claims (5)

  1. 제어부의 제어신호에 의해 전원을 공급받아 구동함에 따라 드라이브 액슬을 구동시키는 주행 모터;a driving motor for driving the drive axle by receiving power according to a control signal from the control unit;
    상기 제어부의 제어신호에 의해 전원을 공급받아 구동되는 유압 모터;a hydraulic motor driven by receiving power according to a control signal of the control unit;
    상기 유압 모터의 구동에 의해 가동되어 유압 탱크 내의 유체를 공급하는 유압 펌프;a hydraulic pump operated by driving the hydraulic motor to supply a fluid in the hydraulic tank;
    상기 유압 모터의 출력을 전동식 산업용 차량의 주행 시 요구되는 토크량에 따라 상기 드라이브 액슬로 전달되도록 연결 또는 해제시키는 클러치; 및a clutch for connecting or releasing the output of the hydraulic motor to be transmitted to the drive axle according to the amount of torque required when the electric industrial vehicle is driven; and
    상기 주행 모터의 구동 온 또는 오프에 따라 유압에 의해 주차 브레이크를 잠금 또는 해제하는 주차 브레이크 장치를 포함하는 구성으로 이루어지는 것을 특징으로 하는 전동식 산업용 차량의 제어 시스템.and a parking brake device for locking or releasing the parking brake by hydraulic pressure according to driving on or off of the driving motor.
  2. 제 1항에 있어서,The method of claim 1,
    상기 유압 펌프의 가동에 의해 설정 압력의 유체를 저장하는 어큐뮬레이터와,an accumulator for storing a fluid of a set pressure by operation of the hydraulic pump;
    상기 어큐뮬레이터에 설정 압력으로 유체가 저장되도록 제어하는 메인 콘트롤 밸브와,a main control valve for controlling the fluid to be stored at a set pressure in the accumulator;
    상기 유압 펌프와 상기 어큐뮬레이터 사이에 배치되어 상기 어큐뮬레이터로 유체가 공급되도록 하는 개폐밸브를 더 포함하는 것을 특징으로 하는 전동식 산업용 차량의 제어 시스템.and an on/off valve disposed between the hydraulic pump and the accumulator to supply a fluid to the accumulator.
  3. 제 2항에 있어서,3. The method of claim 2,
    상기 제어부의 제어신호에 의해 상기 어큐뮬레이터에 저장된 유체를 상기 클러치의 실린더로 공급하거나 또는 상기 클러치의 실린더 내의 유체를 상기 유압 탱크로 리턴시키도록 하는 제1 방향전환밸브를 더 포함하는 것을 특징으로 하는 전동식 산업용 차량의 제어 시스템.Electric type, characterized in that it further comprises a first directional selector valve for supplying the fluid stored in the accumulator to the cylinder of the clutch or returning the fluid in the cylinder of the clutch to the hydraulic tank according to a control signal from the control unit Control systems for industrial vehicles.
  4. 제 1항에 있어서,The method of claim 1,
    상기 제어부의 제어신호에 의해 상기 어큐뮬레이터에 저장된 유체를 상기 주차 브레이크 장치의 실린더로 공급하거나 또는 상기 주차 브레이크 장치의 실린더 내의 유체를 상기 유압 탱크로 리턴시키도록 하는 제2 방향전환밸브를 더 포함하는 것을 특징으로 하는 전동식 산업용 차량의 주차 브레이크 시스템.and a second directional selector valve configured to supply the fluid stored in the accumulator to the cylinder of the parking brake device or return the fluid in the cylinder of the parking brake device to the hydraulic tank according to a control signal from the controller A parking brake system for an electric industrial vehicle characterized by its features.
  5. 제 2항에 있어서,3. The method of claim 2,
    상기 어큐뮬레이터 내의 압력을 측정하기 위한 압력 센서를 더 포함하고,a pressure sensor for measuring the pressure in the accumulator;
    상기 압력 센서에 의한 어큐뮬레이터 내의 압력 측정 값이 설정 범위 이내인 경우, 상기 제어부는 상기 유압 펌프에 가동 신호를 인가하여 상기 어큐뮬레이터로 유체를 공급함에 따라 설정 압력을 유지하도록 하는 것을 특징으로 하는 전동식 산업용 차량의 제어 시스템.When the pressure measurement value in the accumulator by the pressure sensor is within a set range, the control unit applies an operation signal to the hydraulic pump to maintain the set pressure as the fluid is supplied to the accumulator. 's control system.
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