KR20160140592A - 작업 차량 - Google Patents
작업 차량 Download PDFInfo
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- KR20160140592A KR20160140592A KR1020167020782A KR20167020782A KR20160140592A KR 20160140592 A KR20160140592 A KR 20160140592A KR 1020167020782 A KR1020167020782 A KR 1020167020782A KR 20167020782 A KR20167020782 A KR 20167020782A KR 20160140592 A KR20160140592 A KR 20160140592A
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- 238000000034 method Methods 0.000 claims description 44
- 239000007789 gas Substances 0.000 description 133
- 230000008929 regeneration Effects 0.000 description 117
- 238000011069 regeneration method Methods 0.000 description 117
- 238000002347 injection Methods 0.000 description 61
- 239000007924 injection Substances 0.000 description 61
- 239000000446 fuel Substances 0.000 description 55
- 239000013618 particulate matter Substances 0.000 description 44
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 17
- 238000009825 accumulation Methods 0.000 description 15
- 230000007246 mechanism Effects 0.000 description 13
- 230000007935 neutral effect Effects 0.000 description 13
- 230000005856 abnormality Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 9
- 230000007704 transition Effects 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 8
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- 238000000746 purification Methods 0.000 description 8
- 230000002441 reversible effect Effects 0.000 description 7
- 230000004397 blinking Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 3
- 230000000979 retarding effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003971 tillage Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- -1 hydrocarbon HC Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- 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
-
- 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
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- 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
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
- B60W10/184—Conjoint control of vehicle sub-units of different type or different function including control of braking systems with wheel brakes
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- 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
-
- 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
- F01N3/103—Oxidation catalysts for HC and CO only
-
- 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
- F02D29/02—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 vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
-
- 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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/18—Braking system
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- 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/20—Off-Road Vehicles
- B60Y2200/22—Agricultural vehicles
- B60Y2200/221—Tractors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0812—Particle filter loading
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/604—Engine control mode selected by driver, e.g. to manually start particle filter regeneration or to select driving style
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
- F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
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- Combustion & Propulsion (AREA)
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- Transportation (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Analytical Chemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
도 2는 트랙터의 평면도이다.
도 3은 엔진부의 좌측면도이다.
도 4는 엔진부의 우측면도이다.
도 5는 엔진부의 평면도이다.
도 6은 도 4의 확대 설명도이다.
도 7은 전방 우측으로부터 본 엔진부의 사시도이다.
도 8은 후방 우측으로부터 본 엔진부의 사시도이다.
도 9는 컨트롤러 지지체와 엔진 프레임의 관계를 나타내는 사시도이다.
도 10은 조종 좌석측에서 본 미터 패널의 정면도이다.
도 11은 전방 우측으로부터 본 캐빈의 일부 확대도이다.
도 12는 컨트롤러의 기능 블럭도이다.
도 13은 엔진의 연료 계통 설명도이다.
도 14는 연료의 분사 타이밍을 설명하는 도면이다.
도 15는 출력 특성맵의 설명도이다.
도 16은 아이소크로너스 특성과 드룹 특성의 관계를 나타내는 설명도이다.
도 17은 엔진 컨트롤러의 구성을 나타내는 회로 블럭도의 제 1 실시예이다.
도 18은 비작업 재생 제어 실행시의 제어 동작을 나타내는 타이밍 차트이다.
도 19는 어시스트 재생 제어 및 리셋 재생 제어의 플로우 차트이다.
도 20은 비작업 재생 제어의 플로우 차트이다.
도 21은 비작업 재생 제어시에 있어서의 램프 표시 동작을 나타내는 플로우 차트이다.
도 22는 회로 블럭도의 제 2 실시예이다.
도 23은 회로 블럭도의 제 3 실시예이다.
14 : 엔진 프레임(기체 프레임) 50 : 배기 필터
147 : 상측 지지 프레임 160 : 컨트롤러 지지체
161 : 하부 지지체 162 : 상부 지지체
164 : 컨트롤러 부착 판체 220 : 브레이크 페달 스위치
241 : 연결 부재 242 : 록킹 부재
251 : 브레이크 페달 311 : 엔진 컨트롤러
325 : 차압 센서 350 : 제어 방식 선택 스위치
351 : 전자 개폐기 352 : 전자 개폐기
C1 : 코일 C2 : 코일
D1 : 다이오드 Dm1 : 다이오드
R1 : 저항 SW1 : 스위치
SW2 : 스위치 T1 : 드룹 스위칭 단자
T2 : 하이 아이들 제한 단자 Tm1 : 드룹 스위칭 단자
Tm2 : 하이 아이들 스위칭 단자 Tm3 : 하이 아이들 제한 단자
Claims (6)
- 주행 기체에 탑재하는 엔진과, 상기 엔진의 동력으로 회전하는 좌우 한쌍의 주행부와, 상기 좌우 한쌍의 주행부 각각을 제동 조작하기 위한 좌우 한쌍의 브레이크 조작구와, 상기 엔진의 구동을 제어하는 엔진 컨트롤러를 구비하고, 상기 엔진 컨트롤러가 아이소크로너스 제어 및 드룹 제어 중 어느 하나를 선택해서 상기 엔진을 제어하는 작업 차량에 있어서,
상기 아이소크로너스 제어 및 상기 드룹 제어를 택일적으로 선택할 수 있는 제어 방식 선택 스위치를 갖고 있고,
그 제어 방식 선택 스위치에 의해 상기 아이소크로너스 제어가 지정되어 있을 경우, 상기 좌우 브레이크 조작구의 한쪽이 비조작 상태에 있을 때 상기 엔진을 상기 아이소크로너스 제어에 의해 제어하는 한편, 상기 좌우 브레이크 조작구의 양쪽이 조작 상태에 있을 때 상기 엔진을 상기 드룹 제어에 의해 제어하는 것을 특징으로 하는 작업 차량. - 제 1 항에 있어서,
상기 엔진 컨트롤러는 상기 엔진의 정격 회전 속도에 의거하는 하이 아이들 회전 속도 이외에 소정 회전 속도를 기억하고 있고, 상기 제어 방식 선택 스위치에 의해 상기 아이소크로너스 제어가 지정됨과 아울러 상기 좌우 브레이크 조작구의 양쪽이 조작 상태에 있을 때, 상기 엔진 컨트롤러는 상기 소정 회전 속도를 하이 아이들 회전 속도로 설정하는 것을 특징으로 하는 작업 차량. - 제 1 항에 있어서,
상기 주행 기체의 운전 조작 상황을 표시시키는 미터 컨트롤러를 구비하고, 상기 제어 방식 선택 스위치를 상기 미터 컨트롤러와 전기적으로 접속함과 아울러, 상기 브레이크 조작구의 조작 상태가 상기 미터 컨트롤러에 통지되는 구성을 갖고 있는 것을 특징으로 하는 작업 차량. - 제 3 항에 있어서,
상기 엔진 컨트롤러는 상기 아이소크로너스 제어용의 하이 아이들 회전 속도로서 제 1 회전 속도를 기억하고 있고, 상기 운전 컨트롤러를 통해서 상기 엔진 제어 스위칭 스위치에 의해 상기 아이소크로너스 제어가 지정되면, 상기 엔진의 하이 아이들 회전 속도를 전(前) 제 1 회전 속도로 설정하는 것을 특징으로 하는 작업 차량. - 제 3 항 또는 제 4 항에 있어서,
상기 미터 컨트롤러에 의해 제어되고 상기 주행 기체의 운전 조작 상황을 표시하는 운전 조작 표시 장치를 더 구비함과 아울러,
상기 운전 조작 표시 장치의 외측이 되는 위치에 상기 제어 방식 선택 스위치를 설치하는 것을 특징으로 하는 작업 차량. - 제 3 항 또는 제 4 항에 있어서,
상기 주행 기체의 진행 방향을 전진과 후진으로 스위칭 조작하기 위한 전후진 스위칭 레버와, 상기 전후진 스위칭 레버를 하측으로부터 덮는 오조작 방지체를 더 구비하고,
상기 오조작 방지체 상에 상기 제어 방식 선택 스위치를 설치하는 것을 특징으로 하는 작업 차량.
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