US20150260063A1 - Safety device for preventing working-apparatus operation during regeneration of forklift-truck diesel-exhaust gas after-treatment device - Google Patents

Safety device for preventing working-apparatus operation during regeneration of forklift-truck diesel-exhaust gas after-treatment device Download PDF

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Publication number
US20150260063A1
US20150260063A1 US14/434,301 US201314434301A US2015260063A1 US 20150260063 A1 US20150260063 A1 US 20150260063A1 US 201314434301 A US201314434301 A US 201314434301A US 2015260063 A1 US2015260063 A1 US 2015260063A1
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US
United States
Prior art keywords
pressure
control valve
working
working apparatus
working fluid
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US14/434,301
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English (en)
Inventor
Ki Won Won
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Doosan Corp
Original Assignee
Doosan Corp
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 Doosan Corp filed Critical Doosan Corp
Assigned to DOOSAN CORPORATION reassignment DOOSAN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WON, KI WON
Publication of US20150260063A1 publication Critical patent/US20150260063A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/30—Conjoint control of vehicle sub-units of different type or different function including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
    • F01N3/032—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start during filter regeneration only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/60—Industrial applications, e.g. pipe inspection vehicles
    • B60Y2200/62—Conveyors, floor conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/47—Engine emissions
    • B60Y2300/476—Regeneration of particle filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
    • 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
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present disclosure relates to a safety device for preventing a working apparatus from being operated during regeneration of a diesel exhaust gas after-treatment device of a forklift-truck, and more particularly, to a safety device for preventing a working apparatus from being operated during regeneration of a diesel exhaust gas after-treatment device of a forklift-truck, which is capable of preventing a working apparatus from being operated when a worker leaves a driver's seat during regeneration of the diesel exhaust gas after-treatment device.
  • a forklift-truck in which a diesel engine is mounted, is provided with a diesel exhaust gas after-treatment device (diesel particulate filter, hereinafter, referred to as a “DPF”) in a path through which exhaust gas is discharged.
  • a diesel exhaust gas after-treatment device diesel particulate filter, hereinafter, referred to as a “DPF”
  • DPF diesel particulate filter
  • Exhaust gas includes contaminant materials that pollute the atmosphere environment, and as a result, the exhaust has needs to be purified before being discharged to the air, of which the DPF is used as a purifying device.
  • exhaust gas includes carbon particles (soot, PM, etc.), and the carbon particles are accumulated inside the DPF, and when the amount of carbon particles is increased, a function of the DPF is degraded, so that when the carbon particles are accumulated to a predetermined level or more, regeneration of the DPF for removing the carbon particles is performed.
  • the generation of the DPF includes a passive regeneration, which is performed when a predetermined condition is satisfied, and an active regeneration, which is actively performed by an intention of a worker.
  • the forklift-truck is provided with a working apparatus in addition to a travelling function, so that when the DPF is actively regenerated, it is necessary to prepare against a safety accident.
  • a technical object to be achieved in some embodiments of the present disclosure is to provide a safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck, which prevents a working apparatus from being operated even though an operation lever of the working apparatus is operated in an unintentional state during regeneration of a DPF of a forklift-truck.
  • a technical object to be achieved in some embodiments of the present disclosure is not limited to the aforementioned technical object, and other not-mentioned technical objects will be obviously understood from the description below by those with ordinary skill in the art to which the present disclosure pertains.
  • some embodiments of the present disclosure provide a safety device for preventing a working apparatus from being operated during regeneration of a diesel exhaust gas after-treatment device of a forklift-truck, including: a hydraulic pump 30 configured to discharge high-pressure working fluid; a main control valve 50 provided with a plurality of working apparatus control valves, and configured to provide the working fluid to a desired working apparatus 80 among a plurality of working apparatuses 80 ; a remote control valve 60 controlled so as to provide pilot working fluid to the plurality of working apparatus control valves according to an operation of a working apparatus actuation lever 61 ; a pressure-reducing valve 70 controlled in such a way that high-pressure working fluid discharged from the hydraulic pump 30 is pressure-reduced to a pressure of the pilot working fluid to provide the pressure-reduced working fluid to the remote control valve 60 ; and a control valve unit 100 disposed upstream of the remote control valve 60 , and controlled in such a way so as to block the pressure-reduced working fluid from being provided to
  • the worker departure information may be released, so that the control valve unit 100 may be controlled to be open.
  • a signal generated by a seat switch (seat S/W) provided at the driver's seat may be transmitted to an engine control unit (ECU) 10 , and the transmitted signal may transmit the worker departure information from the ECU 10 to the controller 20 .
  • ECU engine control unit
  • the safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck may prevent working fluid provided to a working apparatus from being supplied at the moment where a worker leaves a driver's seat, so that even though the working apparatus actuation lever 61 is operated in an unintentional state during regeneration of the DPF, the working apparatus is not operated, thereby preventing a safety accident.
  • the safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck may prevent a working apparatus from being operated during regeneration of the DPF, so that there is no change in an output, thereby safely performing the regeneration of the DPF.
  • FIG. 1 is a diagram for describing a safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck according to an exemplary embodiment of the present disclosure.
  • FIGS. 2 and 3 are diagrams of a hydraulic circuit of a forklift-truck to which the safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck according to the exemplary embodiment of the present disclosure is applied.
  • FIGS. 1 to 3 a safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck according to an exemplary embodiment of the present disclosure will be described with reference to FIGS. 1 to 3 .
  • FIG. 1 is a diagram for describing a safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck according to an exemplary embodiment of the present disclosure.
  • FIGS. 2 and 3 are diagrams of a hydraulic circuit of a forklift-truck to which the safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck according to the exemplary embodiment of the present disclosure is applied.
  • a safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck is provided with a control valve unit 100 upstream of a remote control valve (RCV) 60 , and the control valve unit 100 is controlled to be opened/closed by a command from a controller 20 .
  • RCV remote control valve
  • the controller 20 receives information from an engine control unit (ECU) 10 through CAN communication.
  • ECU engine control unit
  • the ECU 10 receives a signal from a seat switch (seat S/W) installed in a driver's seat, and the seat switch generates a signal when a worker leaves the driver's seat.
  • a seat switch seat S/W
  • the seat switch when the worker stands up from the driver's seat, the seat switch generates a signal, and the generated signal is transmitted by the ECU 10 , and the transmitted signal provides worker departure information to the controller 20 , and when the worker departure information is received, the controller 20 blocks a flow of working fluid by operating the control valve unit 100 .
  • the hydraulic circuit of a forklift-truck discharges working fluid from a hydraulic pump 30 , and the working fluid is provided to a main control valve 50 via a preferential control valve 40 .
  • the preferential control valve 40 makes the working fluid to be distributed to a travelling system and a working apparatus, and preferentially distributes the larger amount of working fluid to the working apparatus than the travelling system.
  • the main control valve 50 is connected with a working apparatus 80 , and a plurality of working apparatus control valves is disposed inside the main control valve 50 .
  • a working apparatus 80 includes two working apparatuses including a first working apparatus and a second working apparatus
  • two working apparatus control valves may be utilized among the plurality of working apparatus control valves.
  • the working apparatus control valve makes working fluid flow in a forward direction and in a reverse direction, and stops a flow of working fluid according to a position of a spool.
  • the spool is controlled by the RCV 60 , and the RCV 60 is provided with a working apparatus actuation lever 61 .
  • a working apparatus actuation lever 61 of a corresponding working apparatus is operated, and pilot working fluid is discharged from the RCV 60 according to the operation of the working apparatus actuation lever 61 to move the spool of a control valve of the corresponding working apparatus, so that desired work is performed.
  • a part of working fluid discharged from the hydraulic pump 30 is used as the pilot working fluid.
  • a pressure of the working fluid discharged from the hydraulic pump 30 is high, so that the pressure of the working fluid is reduced to be appropriate to a pressure of the pilot working fluid.
  • a pressure-reducing valve 70 is used for reducing a pressure.
  • the RCV 60 is connected with a drain tank, so that pressure is not formed. Accordingly, even though the working apparatus actuation lever 61 is operated, the pilot working fluid is not discharged from the RCV 60 and further, the working apparatus 80 does not move.
  • the worker departure information is released, so that the control valve unit 100 returns to a general working mode, and thus the working fluid is provided to the RCV 60 . That is, the working apparatus is operated by operating the working apparatus actuation lever 61 according to an intention of the worker.
  • the safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck may prevent working fluid provided to a working apparatus from being supplied at the moment where a worker leaves a driver's seat, so that even though the working apparatus actuation lever 61 is operated in an unintentional state during regeneration of the DPF, the working apparatus is not operated, thereby preventing a safety accident.
  • the safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck may prevent a working apparatus from being operated during regeneration of the DPF, so that there is no change in an output, thereby safely performing the regeneration of the DPF.
  • the safety device for preventing a working apparatus from being operated during regeneration of a DPF of a forklift-truck may be used for preventing a working apparatus from moving even if a lever is inadvertently touched during regeneration of a DPF.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US14/434,301 2012-10-11 2013-10-08 Safety device for preventing working-apparatus operation during regeneration of forklift-truck diesel-exhaust gas after-treatment device Abandoned US20150260063A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020120112813A KR101877574B1 (ko) 2012-10-11 2012-10-11 지게차의 디젤 배기가스 후처리장치 재생 중 작업기의 작동방지 안전장치
KR10-2012-0112813 2012-10-11
PCT/KR2013/008968 WO2014058201A1 (ko) 2012-10-11 2013-10-08 지게차의 디젤 배기가스 후처리장치 재생 중 작업기의 작동방지 안전장치

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US20150260063A1 true US20150260063A1 (en) 2015-09-17

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US14/434,301 Abandoned US20150260063A1 (en) 2012-10-11 2013-10-08 Safety device for preventing working-apparatus operation during regeneration of forklift-truck diesel-exhaust gas after-treatment device

Country Status (5)

Country Link
US (1) US20150260063A1 (ko)
EP (1) EP2918802B1 (ko)
KR (1) KR101877574B1 (ko)
CN (1) CN104736804B (ko)
WO (1) WO2014058201A1 (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6458796B2 (ja) * 2016-12-26 2019-01-30 トヨタ自動車株式会社 車両

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632190A (en) * 1995-05-26 1997-05-27 Hitachi Construction Machinery Co., Ltd. Burglarproof device for hydraulic machine
US6062331A (en) * 1998-10-09 2000-05-16 S.A.R.L. Auxiliary hydraulic control system for a work machine

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JP3073380B2 (ja) * 1993-12-17 2000-08-07 日立建機株式会社 排ガス浄化装置を備えた油圧作業機械
KR101259917B1 (ko) * 2006-07-14 2013-05-02 볼보 컨스트럭션 이큅먼트 에이비 건설중장비 조종레버 오작동 방지장치
JP5293009B2 (ja) * 2008-09-01 2013-09-18 コベルコ建機株式会社 建設機械の制御装置
JP5271758B2 (ja) * 2009-03-11 2013-08-21 日立建機株式会社 作業機械の油圧駆動装置
JP5320124B2 (ja) * 2009-03-30 2013-10-23 株式会社小松製作所 作業車両および作業車両の制御方法
JP2010270699A (ja) * 2009-05-22 2010-12-02 Hitachi Constr Mach Co Ltd 建設機械の排気浄化装置
JP5542386B2 (ja) * 2009-08-10 2014-07-09 ユニキャリア株式会社 フォークリフト
JP5523028B2 (ja) * 2009-09-04 2014-06-18 日立建機株式会社 油圧作業機械の油圧駆動装置
JP5517240B2 (ja) * 2009-11-12 2014-06-11 ヤンマー株式会社 作業車両搭載用の排気ガス浄化システム
JP5230674B2 (ja) * 2010-03-10 2013-07-10 日立建機株式会社 作業機械の排気ガス処理装置
KR101688233B1 (ko) * 2010-12-01 2016-12-20 주식회사 두산 중장비의 시동 꺼짐 방지 시스템

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632190A (en) * 1995-05-26 1997-05-27 Hitachi Construction Machinery Co., Ltd. Burglarproof device for hydraulic machine
US6062331A (en) * 1998-10-09 2000-05-16 S.A.R.L. Auxiliary hydraulic control system for a work machine

Also Published As

Publication number Publication date
CN104736804B (zh) 2017-07-25
KR101877574B1 (ko) 2018-07-11
EP2918802A4 (en) 2016-08-03
KR20140046764A (ko) 2014-04-21
CN104736804A (zh) 2015-06-24
WO2014058201A1 (ko) 2014-04-17
EP2918802B1 (en) 2018-04-18
EP2918802A1 (en) 2015-09-16

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AS Assignment

Owner name: DOOSAN CORPORATION, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WON, KI WON;REEL/FRAME:035361/0820

Effective date: 20150306

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION