JP2015021398A - Machine body and work machine - Google Patents

Machine body and work machine Download PDF

Info

Publication number
JP2015021398A
JP2015021398A JP2013147917A JP2013147917A JP2015021398A JP 2015021398 A JP2015021398 A JP 2015021398A JP 2013147917 A JP2013147917 A JP 2013147917A JP 2013147917 A JP2013147917 A JP 2013147917A JP 2015021398 A JP2015021398 A JP 2015021398A
Authority
JP
Japan
Prior art keywords
exhaust gas
reducing agent
injector
urea water
side opening
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.)
Pending
Application number
JP2013147917A
Other languages
Japanese (ja)
Inventor
徹 今野
Toru Konno
徹 今野
純也 徳永
Junya Tokunaga
純也 徳永
伸一 西山
Shinichi Nishiyama
伸一 西山
和平 渡部
Wahei Watabe
和平 渡部
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.)
Caterpillar SARL
Original Assignee
Caterpillar SARL
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 Caterpillar SARL filed Critical Caterpillar SARL
Priority to JP2013147917A priority Critical patent/JP2015021398A/en
Priority to US14/905,491 priority patent/US20160160726A1/en
Priority to EP14739779.8A priority patent/EP3022413A1/en
Priority to CA2917973A priority patent/CA2917973A1/en
Priority to PCT/EP2014/064850 priority patent/WO2015007614A1/en
Priority to CN201480038768.6A priority patent/CN105593483A/en
Priority to KR1020167002998A priority patent/KR20160030227A/en
Publication of JP2015021398A publication Critical patent/JP2015021398A/en
Pending legal-status Critical Current

Links

Images

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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
    • 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
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
    • 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
    • F01N2270/00—Mixing air with exhaust gases
    • F01N2270/02—Mixing air with exhaust gases for cooling exhaust gases or the 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
    • F01N2270/00—Mixing air with exhaust gases
    • F01N2270/08—Mixing air with exhaust gases for evacuation of exhaust gases, e.g. in tail-pipes
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/30—Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02—Catalytic activity of catalytic converters
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/148—Arrangement of sensors
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Transportation (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a machine body which is low in cost, saves space and can cool only a necessary section of an exhaust gas purification device.SOLUTION: An exhaust gas purification device 22 comprises: an injector 29 which injects urea water as liquid reducing agent supplied from a reducing agent supply device through a urea water hose 34 serving as reducing agent supply piping; a NOx sensor 30 which detects a concentration of nitrogen oxide in exhaust gas; and a wind trunk body 35 which has an inlet side opening and an outlet side opening to allow cooling air taken in from an outside of a machine room 19 to cool at least either one of the urea water inside the urea water hose 34, the NOx sensor 30 or the injector 29. The inlet side opening of the wind trunk body 35 is communicated with a ventilation port 26 opening to the outside of the machine room 19. Air in the wind trunk body 35 is forcibly discharged through the outlet side opening of the wind trunk body 35 using negative pressure around an exhaust gas flow generated by an ejector 51 installed in an exhaust pipe passage 24.

Description

本発明は、排ガス浄化装置の冷却構造に特徴を有する機体および作業機械に関する。   The present invention relates to an airframe and a work machine having a feature in a cooling structure of an exhaust gas purification device.

ディーゼルエンジン用の排ガス浄化装置は、還元剤(DEF：Diesel Exhaust Fluid、一般的に尿素水)を噴射するインジェクタおよび窒素酸化物センサ（ＮＯｘセンサ）を備えている。   An exhaust gas purifying apparatus for a diesel engine includes an injector for injecting a reducing agent (DEF: Diesel Exhaust Fluid, generally urea water) and a nitrogen oxide sensor (NOx sensor).

一般的に排ガス浄化装置はエキゾースト管路中に設置される。エキゾースト管路は、高温の排ガスが流れるため、エキゾースト管路および排ガス浄化装置は高温になる。   In general, the exhaust gas purifier is installed in the exhaust pipe. Since exhaust gas of high temperature flows through the exhaust pipe line, the exhaust pipe line and the exhaust gas purification device become high temperature.

排ガス浄化装置が高温になると、排ガス浄化装置に設置されたインジェクタおよびＮＯｘセンサも高温に曝され、さらに、インジェクタに還元剤を供給する還元剤供給配管（一般的に尿素水ホース）の一部も高温に曝されることとなる。これらの尿素水ホース、ＮＯｘセンサまたはインジェクタはその構造上、長時間高温に曝されると耐久性が損なわれてしまうおそれがあるとともに、尿素水ホース内の尿素水が温度上昇して、その還元作用に支障が生じるおそれもある。   When the exhaust gas purification device becomes high temperature, the injector and NOx sensor installed in the exhaust gas purification device are also exposed to high temperature, and a part of the reducing agent supply pipe (generally urea water hose) for supplying the reducing agent to the injector is also present. You will be exposed to high temperatures. These urea water hoses, NOx sensors, and injectors may be damaged in durability if exposed to a high temperature for a long time, and the urea water in the urea water hose rises in temperature and is reduced. There is also a risk of hindering the action.

自動車などの走行する車両では、インジェクタは走行中の外気に曝されることにより冷却されたり、温度の低い還元剤が流入することで冷却される場合もあるが、それでも冷却性能が不足するものに対して、インジェクタに冷却水等の冷媒を循環供給する技術がある（例えば、特許文献１参照）。   In a traveling vehicle such as an automobile, the injector may be cooled by being exposed to the outside air during traveling, or may be cooled by the flow of a reducing agent having a low temperature, but the cooling performance is still insufficient. On the other hand, there is a technique for circulating and supplying a coolant such as cooling water to the injector (see, for example, Patent Document 1).

また、エンジン排ガスのエジェクタ効果により、排ガス浄化装置の収納室全体に冷却風を導入する技術もある（例えば、特許文献２参照）。   In addition, there is a technique for introducing cooling air into the entire storage chamber of the exhaust gas purifying device due to the ejector effect of the engine exhaust gas (see, for example, Patent Document 2).

特開平９−９６２１２号公報JP-A-9-96212 特開２００３−４１６２７号公報JP 2003-41627 A

特許文献１は、冷却水等の冷媒をインジェクタ周囲に流すための専用の冷却水回路を必要とし、その冷却装置は大掛かりで、かつ高価なものとなってしまう。   Patent Document 1 requires a dedicated cooling water circuit for flowing a coolant such as cooling water around the injector, and the cooling device is large and expensive.

特許文献２は、排ガス浄化装置の収納室全体に冷却風を導入する構造であるため、大掛かりな隔離室が必要となり、設置スペース上の問題がある。   Since Patent Document 2 has a structure in which cooling air is introduced into the entire storage chamber of the exhaust gas purifying apparatus, a large isolation chamber is required and there is a problem in installation space.

本発明は、このような点に鑑みなされたもので、低コスト・省スペースで排ガス浄化装置の必要な部分だけを冷却することができる機体および作業機械を提供することを目的とする。   The present invention has been made in view of these points, and an object of the present invention is to provide a machine body and a work machine that can cool only a necessary portion of an exhaust gas purification device at low cost and space saving.

請求項１に記載された発明は、機械室と、機械室内に設置されたエンジンと、エンジンの排ガスを排出するエキゾースト管路と、エキゾースト管路中に設けられて排ガス中の窒素酸化物を還元処理する排ガス浄化装置と、排ガス浄化装置に還元剤供給配管により液状還元剤を供給する還元剤供給装置とを具備した機体において、排ガス浄化装置は、還元剤供給装置から還元剤供給配管により供給された液状還元剤を噴射するインジェクタと、排ガス中の窒素酸化物の濃度を検出する窒素酸化物センサと、還元剤供給配管の一部、窒素酸化物センサの一部およびインジェクタの一部の少なくとも一つを囲むように設置され、機械室の外部から取り入れた冷却風により還元剤供給配管内の液状還元剤、窒素酸化物センサおよびインジェクタの少なくとも一つを冷却する入口側開口および出口側開口を有する風路体と、風路体の入口側開口に連通した機械室の外部に開口した外気吸込口と、エキゾースト管路中に設けられ排ガス流の周囲に形成される負圧を利用して風路体の出口側開口から風路体内の空気を強制的に排出するエジェクタとを具備した機体である。   The invention described in claim 1 is a machine room, an engine installed in the machine room, an exhaust pipe for exhausting exhaust gas from the engine, and a nitrogen oxide provided in the exhaust pipe for reducing nitrogen oxides in the exhaust gas. In an airframe comprising an exhaust gas purification device to be processed and a reducing agent supply device that supplies a liquid reducing agent to the exhaust gas purification device through a reducing agent supply pipe, the exhaust gas purification device is supplied from the reducing agent supply device through the reducing agent supply pipe. At least one of the injector for injecting the liquid reducing agent, the nitrogen oxide sensor for detecting the concentration of nitrogen oxide in the exhaust gas, a part of the reducing agent supply pipe, a part of the nitrogen oxide sensor, and a part of the injector. There are few liquid reducing agents, nitrogen oxide sensors, and injectors in the reducing agent supply pipe by cooling air taken from outside the machine room. An air passage body having an inlet-side opening and an outlet-side opening for cooling both, an outside air inlet opening outside the machine room communicating with the inlet-side opening of the air passage body, and exhaust gas provided in the exhaust pipe An airframe including an ejector that forcibly discharges air in the air passage body from an outlet side opening of the air passage body using a negative pressure formed around the flow.

請求項２に記載された発明は、請求項１記載の機体と、機体に搭載された作業装置とを具備した作業機械である。   The invention described in claim 2 is a work machine including the machine body according to claim 1 and a work device mounted on the machine body.

請求項１記載の発明によれば、風路体の入口側開口は機械室外部の外気吸込口に連通され、エキゾースト管路中に設けられたエジェクタにより排ガス流の周囲に形成される負圧を利用して風路体の出口側開口から風路体内の空気をエキゾースト管路中の排ガス流に吸引して強制的に外部へ排出するようにした構造であるため、エンジンが駆動し排ガスが排出されている間は、常に風路体に外気が導入され、還元剤供給配管内の液状還元剤、窒素酸化物センサおよびインジェクタの少なくとも一つを効率よく冷却することが可能であり、特別な冷却水管路やポンプを必要とせず、低コストのダクト構造で冷却効果を得ることができるとともに、冷却対象箇所を局所的に囲む風路体を設置すればよいので、省スペースで済む。   According to the first aspect of the present invention, the opening on the inlet side of the air passage body communicates with the outside air suction port outside the machine room, and the negative pressure formed around the exhaust gas flow by the ejector provided in the exhaust pipe is reduced. Since the structure is designed to draw air from the outlet side of the air passage body into the exhaust gas flow in the exhaust pipe and forcibly discharge it to the outside, the engine is driven and exhaust gas is discharged. During this time, outside air is always introduced into the air passage body, and at least one of the liquid reducing agent, the nitrogen oxide sensor and the injector in the reducing agent supply pipe can be efficiently cooled. A water pipe and a pump are not required, a cooling effect can be obtained with a low-cost duct structure, and space can be saved because an air passage body that locally surrounds a portion to be cooled may be installed.

請求項２記載の発明によれば、定位置で作業する作業機械において、排ガス浄化装置の還元剤供給配管内の液状還元剤、窒素酸化物センサおよびインジェクタの少なくとも一つを効率よく冷却できる安価な冷却手段を提供できる。   According to the second aspect of the present invention, in a working machine that operates at a fixed position, it is possible to efficiently cool at least one of the liquid reducing agent, the nitrogen oxide sensor, and the injector in the reducing agent supply pipe of the exhaust gas purification device. A cooling means can be provided.

本発明に係る機体の機械室の一実施の形態を示す概略平面図である。It is a schematic plan view which shows one Embodiment of the machine room of the airframe which concerns on this invention. 同上機体の排ガス浄化装置およびその周辺部を示す斜視図である。It is a perspective view which shows the exhaust gas purification apparatus of an aircraft body same as the above, and its peripheral part. 同上機体の排ガス浄化装置の周辺部のみを示す斜視図である。It is a perspective view which shows only the peripheral part of the exhaust gas purification apparatus of an aircraft body same as the above. 同上機体を備えた作業機械を示す正面図である。It is a front view which shows the working machine provided with the aircraft body same as the above.

以下、本発明を、図１乃至図４に示された一実施の形態に基いて詳細に説明する。   Hereinafter, the present invention will be described in detail based on one embodiment shown in FIGS.

図４に示されるように、油圧ショベル形の作業機械10は、機体11が、下部走行体12と、この下部走行体12に旋回可能に設けられた上部旋回体13とを備え、この機体11の上部旋回体13にバケット形の作業装置14が搭載されている。   As shown in FIG. 4, the excavator-type work machine 10 includes a machine body 11 including a lower traveling body 12 and an upper revolving body 13 that is turnably provided on the lower traveling body 12. A bucket-type working device 14 is mounted on the upper swing body 13 of the above.

上部旋回体13上には、作業装置14の取付部を挟んで、オペレータの運転席が設けられたキャブ15と、工具などを収納するストレージボックス16とが設けられている。このストレージボックス16の後方には、燃料タンク17および作動油タンク18が設けられている。上部旋回体13の旋回軸受部より後部には機械室（エンジンルーム）19が設置され、さらにその後部にはカウンタウエイト20が設置されている。   On the upper swing body 13, a cab 15 provided with an operator's driver's seat and a storage box 16 for storing tools and the like are provided with an attachment portion of the work device 14 interposed therebetween. A fuel tank 17 and a hydraulic oil tank 18 are provided behind the storage box 16. A machine room (engine room) 19 is installed behind the slewing bearing portion of the upper swing body 13, and a counterweight 20 is installed behind the machine room.

図１に示されるように、機械室19内には、エンジン21が設置され、このエンジン21の一側部には、ラジエータおよびオイルクーラなどのクーリングパッケージ（図示せず）に外部から吸引した冷却風を当てて冷却する冷却ファン21fが配置され、エンジン21の他側部には、エンジン21の排気系に対して排ガスを浄化処理する排ガス浄化装置22が配置されている。   As shown in FIG. 1, an engine 21 is installed in the machine room 19, and cooling that is sucked from outside into a cooling package (not shown) such as a radiator and an oil cooler is provided on one side of the engine 21. A cooling fan 21f that cools by applying wind is disposed, and an exhaust gas purification device 22 that purifies exhaust gas with respect to the exhaust system of the engine 21 is disposed on the other side of the engine 21.

図４に戻って、機械室19の上部には、エンジンフード23が開閉可能に設けられ、このエンジンフード23より、エンジン21の排ガスを排出するエキゾースト管路24の先端が突出されている。また、機械室19の外側面部にはサイドドア25が開閉可能に設けられ、このサイドドア25の上部には、機械室19の外部に開口された外気吸込口としての換気口26が設けられている。   Returning to FIG. 4, an engine hood 23 is provided on the upper portion of the machine room 19 so as to be openable and closable, and a tip of an exhaust pipe 24 for discharging exhaust gas from the engine 21 protrudes from the engine hood 23. In addition, a side door 25 is provided on the outer side surface of the machine room 19 so as to be openable and closable. Yes.

図１および図２に示されるように、排ガス浄化装置22は、エンジン21の排気口に、エキゾースト管路24の起点となる接続手段21eにより、エンジン21から排出された排ガス中の黒煙を除去する黒煙除去装置（Diesel Particulate Filter）27の一端部27aが接続され、この黒煙除去装置27の反対側の端部に設けられた配管接続部27bに、配管28aにより、排ガス中の窒素酸化物を還元処理する窒素酸化物還元装置（Selective Catalytic Reduction）28の反対側の端部28bが接続され、この窒素酸化物還元装置28の逆側の端部に設けられた配管接続部28cにエキゾースト管路24の残りの部分が接続されたものである。   As shown in FIG. 1 and FIG. 2, the exhaust gas purification device 22 removes black smoke in the exhaust gas discharged from the engine 21 at the exhaust port of the engine 21 by the connecting means 21e that is the starting point of the exhaust pipe 24. One end portion 27a of a black smoke removal device (Diesel Particulate Filter) 27 is connected, and the pipe connection portion 27b provided at the opposite end of the black smoke removal device 27 is connected to a pipe 28a to oxidize nitrogen in exhaust gas. An end 28b on the opposite side of a nitrogen oxide reduction device (Selective Catalytic Reduction) 28 for reducing a product is connected, and an exhaust pipe is connected to a pipe connection portion 28c provided on the opposite end of the nitrogen oxide reduction device 28. The remaining part of the pipeline 24 is connected.

黒煙除去装置27の配管接続部27bには、黒煙除去装置27と窒素酸化物還元装置28とを連通する配管28a内に向けて、尿素水などの液状還元剤を噴射するインジェクタ29が取り付けられ、このインジェクタ29の近傍には、排ガス中の窒素酸化物（ＮＯｘ）の濃度を検出する窒素酸化物センサとしてのＮＯｘセンサ30が配置されている。   An injector 29 that injects a liquid reducing agent such as urea water is attached to the pipe connecting portion 27b of the black smoke removing device 27 toward the inside of the pipe 28a that connects the black smoke removing device 27 and the nitrogen oxide reducing device 28. In the vicinity of the injector 29, a NOx sensor 30 is disposed as a nitrogen oxide sensor for detecting the concentration of nitrogen oxide (NOx) in the exhaust gas.

このＮＯｘセンサ30は、黒煙除去装置27の配管接続部27bに設けられた上流側ＮＯｘセンサ本体30aと、窒素酸化物還元装置28の配管接続部28cに設けられた下流側ＮＯｘセンサ本体30bと、上流側ＮＯｘセンサ本体30aに接続された制御ボックス30Aと、下流側ＮＯｘセンサ本体30bに接続された制御ボックス30Bとを備えている。   The NOx sensor 30 includes an upstream NOx sensor main body 30a provided in the pipe connection part 27b of the black smoke removing device 27, and a downstream NOx sensor main body 30b provided in the pipe connection part 28c of the nitrogen oxide reduction device 28. A control box 30A connected to the upstream NOx sensor body 30a and a control box 30B connected to the downstream NOx sensor body 30b.

インジェクタ29に対して、図４に示されるようにエンジン21の熱影響を受けない位置にあるストレージボックス16内から窒素酸化物還元装置28に尿素水などの液状還元剤を供給する還元剤供給装置31が設けられている。   As shown in FIG. 4, a reducing agent supply device that supplies a liquid reducing agent such as urea water to the nitrogen oxide reducing device 28 from the storage box 16 that is not affected by the heat of the engine 21 as shown in FIG. 4. 31 is provided.

この還元剤供給装置31は、図４に示されるように、ストレージボックス16内に設置された液状還元剤貯留用の液状還元剤タンク32およびこの液状還元剤タンク32内の液状還元剤を汲み上げ吐出する液状還元剤供給源としての液状還元剤ポンプ33と、この液状還元剤ポンプ33から機体11内の配管経路を経て液状還元剤噴射用のインジェクタ29にわたり配設された還元剤供給配管としての尿素水ホース34とを備え、この尿素水ホース34の先端側の一部を囲むように、風路体35が設けられている。   As shown in FIG. 4, the reducing agent supply device 31 pumps up and discharges the liquid reducing agent tank 32 for storing the liquid reducing agent installed in the storage box 16 and the liquid reducing agent in the liquid reducing agent tank 32. A liquid reducing agent pump 33 as a liquid reducing agent supply source, and urea as a reducing agent supply pipe disposed from the liquid reducing agent pump 33 through a piping path in the fuselage 11 to an injector 29 for liquid reducing agent injection. The air passage body 35 is provided so as to surround a part of the front end side of the urea water hose 34.

図１に示されるように、この風路体35の内部に、インジェクタ29の一部と、ＮＯｘセンサ30の一部と、尿素水ホース34内の液状還元剤としての尿素水が排ガス浄化装置22から熱影響を受け易い尿素水ホース34の一部とがそれぞれ収納されている。   As shown in FIG. 1, a part of the injector 29, a part of the NOx sensor 30, and urea water as a liquid reducing agent in the urea water hose 34 are contained in the air passage body 35. And a part of the urea water hose 34 that is easily affected by heat.

図２および図３に示されるように、風路体35は、プレート41上に固定設置された箱状体であり、この風路体35の下部の側面には入口側開口42が設けられ、この入口側開口42に吸込ダクト43が接続連通され、この吸込ダクト43は、上下２枚のプレート44，45間に形成されたコ字形断面の角部通路46を経て、プレート41とプレート44との間に形成されたコ字形断面の開口部47に連通され、この開口部47は、前記サイドドア25の換気口26に臨むように設けられ、この換気口26が、機械室19の外部から風路体35内に冷却風を取り入れる際の入口となっている。   As shown in FIGS. 2 and 3, the air passage body 35 is a box-like body fixedly installed on the plate 41, and an inlet-side opening 42 is provided on a lower side surface of the air passage body 35. A suction duct 43 is connected to and communicated with the inlet-side opening 42. The suction duct 43 passes through a corner passage 46 having a U-shaped cross section formed between two upper and lower plates 44 and 45, and the plate 41 and the plate 44 are connected to each other. Are communicated with an opening 47 having a U-shaped cross section formed between the opening 47 and the opening 47 so as to face the ventilation opening 26 of the side door 25. It serves as an entrance for taking cooling air into the air passage body 35.

角部通路46は、外側に開放面を有するが、機体カバーまたはそれに付随する部材などにより、その開放面が閉じられ、ダクトとなる。吸込ダクト43および角部通路46によって、ダクト状風路43，46を形成する。排ガス浄化装置22は、プレート44上に取付板48によって固定設置されている。   The corner passage 46 has an open surface on the outer side, but the open surface is closed by a fuselage cover or a member attached thereto to form a duct. Duct-like air passages 43 and 46 are formed by the suction duct 43 and the corner passage 46. The exhaust gas purification device 22 is fixedly installed on the plate 44 by a mounting plate 48.

前記エキゾースト管路24は、図２に示されるように窒素酸化物還元装置28の配管接続部28cからいったん水平方向に引き出されてから斜め上方へ配管されているが、その途中部にエジェクタ51が設けられ、このエジェクタ51の外側面に設けられた吸込口52と、上記風路体35の上端面部に形成された出口側開口53とが、吸込管54により連通されている。このエジェクタ51は、排ガス流の周囲に形成される負圧を利用して風路体35の出口側開口53から風路体35内の空気を強制的に吸引するものである。   As shown in FIG. 2, the exhaust pipe 24 is once pulled out from the pipe connecting portion 28c of the nitrogen oxide reduction device 28 in the horizontal direction and then piped obliquely upward. A suction port 52 provided on the outer side surface of the ejector 51 and an outlet side opening 53 formed in the upper end surface portion of the air passage body 35 are communicated with each other by a suction pipe 54. The ejector 51 forcibly sucks the air in the air passage body 35 from the outlet side opening 53 of the air passage body 35 using the negative pressure formed around the exhaust gas flow.

図２および図３に示されるように、前記プレート44上には、排ガス浄化装置22の外側を囲むようにＬ字形に配置された壁体55が設けられ、この壁体55の外側面に設けられたフック56およびプレート44上に設置された金具57によって、前記尿素水ホース34が壁体55に沿って配設され、さらに、プレート44の一部から切り起された配管導入口部58より角部通路46内に引き込まれた尿素水ホース34は、吸込ダクト43内を経て風路体35内に挿入され、さらにインジェクタ29に接続されている。   As shown in FIGS. 2 and 3, a wall body 55 arranged in an L shape so as to surround the outside of the exhaust gas purification device 22 is provided on the plate 44, and provided on the outer surface of the wall body 55. The urea water hose 34 is arranged along the wall body 55 by the hooks 56 and the metal fittings 57 installed on the plate 44, and further from a pipe introduction port portion 58 cut and raised from a part of the plate 44. The urea water hose 34 drawn into the corner passage 46 is inserted into the air passage body 35 through the suction duct 43 and further connected to the injector 29.

ＮＯｘセンサ30の各制御ボックス30A，30Bに接続された風路体35内の配線は、吸込ダクト43内などを経て、機体11内に設置された、液状還元剤ポンプ33を制御するコントローラ（図示せず）に接続されている。   The wiring in the air passage body 35 connected to each control box 30A, 30B of the NOx sensor 30 is connected to the suction duct 43 and the like, and is installed in the airframe 11 to control the liquid reducing agent pump 33 (see FIG. (Not shown).

次に、この図１乃至図４に示された実施の形態の作用効果を説明する。   Next, the function and effect of the embodiment shown in FIGS. 1 to 4 will be described.

還元剤供給装置31は、ストレージボックス16内の液状還元剤タンク32内にある尿素水を液状還元剤ポンプ33により汲み上げ、尿素水ホース34を通して機械室19内の排ガス浄化装置22に供給し、インジェクタ29により窒素酸化物還元装置28の上流側に接続された配管28a内に噴射する。   The reducing agent supply device 31 pumps the urea water in the liquid reducing agent tank 32 in the storage box 16 by the liquid reducing agent pump 33, and supplies it to the exhaust gas purification device 22 in the machine room 19 through the urea water hose 34. 29 is injected into the pipe 28a connected to the upstream side of the nitrogen oxide reduction device 28.

その際、壁体55、角部通路46、吸込ダクト43および風路体35は、排ガス浄化装置22から放射される熱を遮断して尿素水ホース34を熱から防護する遮熱構造物として機能し、また、エキゾースト管路24中に設けられたエジェクタ51により排ガス流の周囲に形成される負圧により風路体35の出口側開口53から風路体35内の空気をエキゾースト管路24中の排ガス流に吸引して強制的に外部へ排出するので、機体11の外部の低温外気をサイドドア25の外気吸込口としての換気口26から開口部47、角部通路46および吸込ダクト43を経て風路体35内に吸い込むことができる。   At that time, the wall body 55, the corner passage 46, the suction duct 43, and the air passage body 35 function as a heat shield structure that shields the urea water hose 34 from heat by shielding heat radiated from the exhaust gas purification device 22. In addition, air in the air duct body 35 is discharged from the outlet side opening 53 of the air duct body 35 by the negative pressure formed around the exhaust gas flow by the ejector 51 provided in the exhaust duct 24 in the exhaust duct 24. Since the exhaust air is sucked into the exhaust gas flow and forced out to the outside, the low-temperature outside air outside the airframe 11 is connected to the opening 47, the corner passage 46 and the suction duct 43 from the ventilation port 26 as the outside air suction port of the side door 25. After that, it can be sucked into the air passage body 35.

これにより、エンジン21が稼働している間は、風路体35内は低温外気により冷却され、この風路体35内に嵌合された尿素水ホース34内の尿素水、ＮＯｘセンサ30およびインジェクタ29を冷却することができる。   Thus, while the engine 21 is in operation, the inside of the air passage body 35 is cooled by the low temperature outside air, and the urea water in the urea water hose 34 fitted in the air passage body 35, the NOx sensor 30 and the injector. 29 can be cooled.

このように、風路体35の入口側開口42は機械室外部の換気口26に連通され、エキゾースト管路24中に設けられたエジェクタ51により排ガス流の周囲に形成される負圧を利用して風路体35の出口側開口53から風路体35内の空気をエキゾースト管路24中の排ガス流に吸引して強制的に外部へ排出するようにした構造であるため、エンジン21が駆動し排ガスが排出されている間は、常に風路体35に外気が導入され、排ガス浄化装置22の高温に曝される尿素水ホース34内の尿素水、ＮＯｘセンサ30およびインジェクタ29を効率よく冷却することが可能であり、特別な冷却水管路やポンプを必要とせず、低コストのダクト構造で冷却効果を得ることができるとともに、尿素水ホース34の一部、ＮＯｘセンサ30の一部およびインジェクタ29の一部すなわち冷却対象箇所を局所的に囲む風路体35を設置すればよいので、省スペースで済む。   In this way, the inlet side opening 42 of the air passage body 35 communicates with the ventilation port 26 outside the machine room, and uses the negative pressure formed around the exhaust gas flow by the ejector 51 provided in the exhaust pipe 24. The engine 21 is driven because the air in the air passage body 35 is sucked into the exhaust gas flow in the exhaust pipe 24 through the outlet side opening 53 of the air passage body 35 and forcedly discharged to the outside. While the exhaust gas is being discharged, outside air is always introduced into the air passage body 35, and the urea water in the urea water hose 34 exposed to the high temperature of the exhaust gas purification device 22, the NOx sensor 30, and the injector 29 are efficiently cooled. It is possible to obtain a cooling effect with a low-cost duct structure without requiring a special cooling water pipe or pump, and a part of the urea water hose 34, a part of the NOx sensor 30, and an injector Part of 29, that is, the location to be cooled Since may be installed locally surrounds Kazerotai 35, it requires a small space.

また、定位置で作業する作業機械10において、排ガス浄化装置22の高温に曝される尿素水ホース34内の尿素水、ＮＯｘセンサ30およびインジェクタ29を効率よく冷却できる安価な冷却手段を提供できる。   Further, in the work machine 10 working at a fixed position, it is possible to provide an inexpensive cooling means capable of efficiently cooling the urea water in the urea water hose 34 exposed to the high temperature of the exhaust gas purification device 22, the NOx sensor 30, and the injector 29.

なお、風路体35は、図２および図３に示される箱状体の形状に限定されるものではなく、入口側開口42から出口側開口53までをダクト状とし、そのダクト内に尿素水ホース34の高温に曝される箇所、ＮＯｘセンサ30およびインジェクタ29の一部を配置する構造としてもよく、同様の効果が得られる。   The air passage body 35 is not limited to the box-like shape shown in FIGS. 2 and 3, and the duct from the inlet side opening 42 to the outlet side opening 53 is formed, and urea water is contained in the duct. A portion where the hose 34 is exposed to a high temperature, a part of the NOx sensor 30 and the injector 29 may be arranged, and the same effect can be obtained.

また、風路体35は、尿素水ホース34内の尿素水、ＮＯｘセンサ30およびインジェクタ29を冷却するようにしているが、必要に応じて、尿素水ホース34の一部、ＮＯｘセンサ30の一部およびインジェクタ29の一部の一つまたは二つを囲むように設置し、これらの一つまたは二つを外部から取り入れた冷却風により冷却するようにしてもよい。   The air passage body 35 cools the urea water in the urea water hose 34, the NOx sensor 30, and the injector 29. If necessary, a part of the urea water hose 34, a part of the NOx sensor 30 is used. It may be arranged so as to surround one or two of the parts and the injector 29, and one or two of them may be cooled by cooling air taken from the outside.

本発明は、排ガス浄化装置の冷却構造に特徴を有する機体および作業機械の製造業などに関わる事業者にとって利用可能である。   INDUSTRIAL APPLICABILITY The present invention can be used by business operators involved in the manufacturing industry of machine bodies and work machines having a feature in the cooling structure of an exhaust gas purification device.

10 作業機械
11 機体
14 作業装置
19 機械室
21 エンジン
22 排ガス浄化装置
24 エキゾースト管路
26 外気吸込口としての換気口
29 インジェクタ
30 窒素酸化物センサとしてのＮＯｘセンサ
31 還元剤供給装置
34 還元剤供給配管としての尿素水ホース
35 風路体
42 入口側開口
51 エジェクタ
53 出口側開口 10 work machines
11 Aircraft
14 Working equipment
19 Machine room
21 engine
22 Exhaust gas purification equipment
24 Exhaust pipeline
26 Ventilation port as an outside air intake port
29 Injector
30 NOx sensor as nitrogen oxide sensor
31 Reducing agent supply device
34 Urea water hose as reducing agent supply piping
35 Airway body
42 Entrance side opening
51 Ejector
53 Exit opening

Claims (2)

機械室と、
機械室内に設置されたエンジンと、
エンジンの排ガスを排出するエキゾースト管路と、
エキゾースト管路中に設けられて排ガス中の窒素酸化物を還元処理する排ガス浄化装置と、
排ガス浄化装置に還元剤供給配管により液状還元剤を供給する還元剤供給装置とを具備した機体において、
排ガス浄化装置は、
還元剤供給装置から還元剤供給配管により供給された液状還元剤を噴射するインジェクタと、
排ガス中の窒素酸化物の濃度を検出する窒素酸化物センサと、
還元剤供給配管の一部、窒素酸化物センサの一部およびインジェクタの一部の少なくとも一つを囲むように設置され、機械室の外部から取り入れた冷却風により還元剤供給配管内の液状還元剤、窒素酸化物センサおよびインジェクタの少なくとも一つを冷却する入口側開口および出口側開口を有する風路体と、
風路体の入口側開口に連通した機械室の外部に開口した外気吸込口と、
エキゾースト管路中に設けられ排ガス流の周囲に形成される負圧を利用して風路体の出口側開口から風路体内の空気を強制的に排出するエジェクタと
を具備したことを特徴とする機体。 A machine room,
An engine installed in the machine room,
An exhaust line for exhausting the exhaust gas from the engine;
An exhaust gas purifying device provided in the exhaust pipe for reducing nitrogen oxides in the exhaust gas;
In an airframe equipped with a reducing agent supply device for supplying a liquid reducing agent to an exhaust gas purification device through a reducing agent supply pipe,
The exhaust gas purification device
An injector for injecting a liquid reducing agent supplied from a reducing agent supply device through a reducing agent supply pipe;
A nitrogen oxide sensor for detecting the concentration of nitrogen oxide in the exhaust gas;
Liquid reductant in the reductant supply pipe that is installed to surround at least one part of the reductant supply pipe, part of the nitrogen oxide sensor, and part of the injector. An air passage body having an inlet side opening and an outlet side opening for cooling at least one of the nitrogen oxide sensor and the injector;
An outside air inlet opening to the outside of the machine room communicating with the inlet side opening of the air passage body;
And an ejector forcibly discharging air in the air passage body from the opening on the outlet side of the air passage body using a negative pressure formed in the exhaust pipe and formed around the exhaust gas flow. Aircraft. 請求項１記載の機体と、
機体に搭載された作業装置と
を具備したことを特徴とする作業機械。 An airframe according to claim 1;
A work machine comprising: a work device mounted on a machine body.
JP2013147917A 2013-07-16 2013-07-16 Machine body and work machine Pending JP2015021398A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2013147917A JP2015021398A (en) 2013-07-16 2013-07-16 Machine body and work machine
US14/905,491 US20160160726A1 (en) 2013-07-16 2014-07-10 Machine Body and Working Machine
EP14739779.8A EP3022413A1 (en) 2013-07-16 2014-07-10 Machine body and working machine
CA2917973A CA2917973A1 (en) 2013-07-16 2014-07-10 Machine body and working machine
PCT/EP2014/064850 WO2015007614A1 (en) 2013-07-16 2014-07-10 Machine body and working machine
CN201480038768.6A CN105593483A (en) 2013-07-16 2014-07-10 Machine body and working machine
KR1020167002998A KR20160030227A (en) 2013-07-16 2014-07-10 Machine body and working machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013147917A JP2015021398A (en) 2013-07-16 2013-07-16 Machine body and work machine

Publications (1)

Publication Number Publication Date
JP2015021398A true JP2015021398A (en) 2015-02-02

Family

ID=51210456

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013147917A Pending JP2015021398A (en) 2013-07-16 2013-07-16 Machine body and work machine

Country Status (7)

Country Link
US (1) US20160160726A1 (en)
EP (1) EP3022413A1 (en)
JP (1) JP2015021398A (en)
KR (1) KR20160030227A (en)
CN (1) CN105593483A (en)
CA (1) CA2917973A1 (en)
WO (1) WO2015007614A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7351600B2 (en) 2020-01-08 2023-09-27 キャタピラー エス エー アール エル Airframe and working machinery

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2985166B1 (en) * 2014-08-14 2017-08-02 CNH Industrial Italia S.p.A. Exhaust system for an off-road vehicle
US9945099B2 (en) * 2014-11-21 2018-04-17 Kcm Corporation Industrial vehicle
JP6560587B2 (en) * 2015-10-06 2019-08-14 日立建機株式会社 Construction machinery
DE112016000029T5 (en) * 2016-05-24 2018-02-15 Komatsu Ltd. working vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11208290A (en) * 1998-01-20 1999-08-03 Shin Caterpillar Mitsubishi Ltd Cooling mechanism for engine or the like in running work machine
JP2003300421A (en) * 2002-04-09 2003-10-21 Shin Caterpillar Mitsubishi Ltd Construction machine
JP2010285814A (en) * 2009-06-12 2010-12-24 Kobelco Contstruction Machinery Ltd Working machine
JP2012017686A (en) * 2010-07-08 2012-01-26 Isuzu Motors Ltd Nox sensor diagnostic device and scr system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856366C1 (en) * 1998-12-07 2000-04-20 Siemens Ag Urea injection system treating exhaust gases from lean burn engine, comprises air-cooling jacket surrounding injector valve to keep it cool, so that a petrol injection valve may be used
US6302066B1 (en) * 1999-04-30 2001-10-16 Caterpillar Inc. Apparatus and method of cooling a work machine
JP2001348909A (en) * 2000-06-02 2001-12-21 Shin Caterpillar Mitsubishi Ltd Construction machinery
JP3978320B2 (en) * 2001-07-31 2007-09-19 新キャタピラー三菱株式会社 Construction machinery with built-in exhaust gas reduction device
SE525066C2 (en) * 2003-04-16 2004-11-23 Volvo Constr Equip Holding Se Method of ventilating a working machine, and such a working machine
US7931104B2 (en) * 2007-08-28 2011-04-26 Caterpillar Paving Products Inc. Machine having cooling system and method
KR101026190B1 (en) * 2009-01-23 2011-03-31 볼보 컨스트럭션 이큅먼트 에이비 Aparatus for decreasing exhausted overheating gas temperature of engine room
US8919469B2 (en) * 2010-08-26 2014-12-30 Caterpillar Inc. Ventilation system for engine and aftertreatment compartments and components
JP2013241809A (en) * 2012-05-22 2013-12-05 Caterpillar Sarl Airframe and work machine
JP5783216B2 (en) * 2013-10-15 2015-09-24 コベルコ建機株式会社 Exhaust structure of construction machinery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11208290A (en) * 1998-01-20 1999-08-03 Shin Caterpillar Mitsubishi Ltd Cooling mechanism for engine or the like in running work machine
JP2003300421A (en) * 2002-04-09 2003-10-21 Shin Caterpillar Mitsubishi Ltd Construction machine
JP2010285814A (en) * 2009-06-12 2010-12-24 Kobelco Contstruction Machinery Ltd Working machine
JP2012017686A (en) * 2010-07-08 2012-01-26 Isuzu Motors Ltd Nox sensor diagnostic device and scr system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7351600B2 (en) 2020-01-08 2023-09-27 キャタピラー エス エー アール エル Airframe and working machinery

Also Published As

Publication number Publication date
CN105593483A (en) 2016-05-18
WO2015007614A1 (en) 2015-01-22
CA2917973A1 (en) 2015-01-22
EP3022413A1 (en) 2016-05-25
KR20160030227A (en) 2016-03-16
US20160160726A1 (en) 2016-06-09

Similar Documents

Publication Publication Date Title
KR101579213B1 (en) Exhaust gas aftertreatment unit, and construction vehicle equipped with same
US9003779B2 (en) Wheel loader
US9394817B2 (en) Cooling structure for urea aqueous solution conduit
JP5939570B2 (en) Airframe and work machine
EP2975234B1 (en) Engine device
US9388730B2 (en) Ventilation structure for engine compartment
JP2015021398A (en) Machine body and work machine
US9194104B2 (en) Wheel loader
KR101630253B1 (en) Work vehicle
JP2013241809A (en) Airframe and work machine
EP3173537B1 (en) Engine compartment of a work vehicle
CN104047697A (en) System and Method for Post-Shutdown Temperature Management and Purge
WO2014155505A1 (en) Work vehicle and wheel loader
EP3009759B1 (en) Utility vehicle
EP3438425B1 (en) Working machine
US9016428B2 (en) Work vehicle and wheel loader
US9528244B2 (en) Work vehicle
JP2016098731A (en) Machine body and work machine
KR101578337B1 (en) Hydraulic shovel
JP2015004187A (en) Pipe cooling system in engine room of construction machine

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20151111

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20161222

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170111

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20171004