JP2017061895A - 建設機械 - Google Patents
建設機械 Download PDFInfo
- Publication number
- JP2017061895A JP2017061895A JP2015188117A JP2015188117A JP2017061895A JP 2017061895 A JP2017061895 A JP 2017061895A JP 2015188117 A JP2015188117 A JP 2015188117A JP 2015188117 A JP2015188117 A JP 2015188117A JP 2017061895 A JP2017061895 A JP 2017061895A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- exhaust
- vehicle speed
- downhill condition
- construction machine
- 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.)
- Granted
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 20
- 230000001133 acceleration Effects 0.000 description 4
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Images
Classifications
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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
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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
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
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- B60W10/024—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches including control of torque converters
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- E—FIXED CONSTRUCTIONS
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- E02F9/22—Hydraulic or pneumatic drives
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16H2061/216—Providing engine brake control by using exhaust brakes
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- 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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Automation & Control Theory (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Supercharger (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
Description
第1降坂条件:エンジンの実回転数が設定回転数以上、かつ、エンジン負荷率が設定割合以下
第2降坂条件:エンジンが変速機を介して車輪と連結される場合であって操縦者によって車速モードが選択される場合、実車速が選択された車速モードの許容車速以上
処理1:排気ブレーキを実行する(エンジン21からの排気の流量を低減させてエンジン21の負荷を高くする)ように排気調整機構54を制御する。
処理2:ファン用モータ39の回転数を所定値(例えば、通常時の回転数の2倍)以上とするようにファン回路38を制御する。
処理3:循環ライン41を遮断するように開閉弁43を制御する。
処理4:トルクコンバータ22の出力軸が入力軸と拘束されるようにロックアップ装置26を制御する。
本発明は上述した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変形が可能である。
16,17 車輪
21 エンジン
22 トルクコンバータ
23 変速機
26 ロックアップ装置
31 メインポンプ(油圧ポンプ)
32 ファン用ポンプ(油圧ポンプ)
34 ステアリングシリンダ(油圧アクチュエータ)
35 荷役回路
36 ブームシリンダ(油圧アクチュエータ)
37 バケットシリンダ(油圧アクチュエータ)
38 ファン回路
39 ファン用モータ(油圧アクチュエータ)
40 タンク
41 循環ライン
43 開閉弁
45 逃しライン
46 リリーフ弁
51 ターボチャージャ
52 圧縮機
53 タービン
54 排気調整機構
6 制御装置
Claims (7)
- 油圧アクチュエータへ作動油を供給する少なくとも1つの油圧ポンプを駆動するエンジンと、
前記エンジンからの排気の流量を調整する排気調整機構と、
前記排気調整機構を制御する制御装置と、を備え、
前記制御装置は、以下の第1降坂条件または第2降坂条件が成立するか否かを判定し、第1降坂条件または第2降坂条件が成立する場合には、排気ブレーキを実行するように前記排気調整機構を制御する、建設機械。
第1降坂条件:エンジンの実回転数が設定回転数以上、かつ、エンジン負荷率が設定割合以下
第2降坂条件:エンジンが変速機を介して車輪と連結される場合であって操縦者によって車速モードが選択される場合、実車速が選択された車速モードの許容車速以上 - 前記車速は、前記変速機の出力軸の回転数である、請求項1に記載の建設機械。
- 前記制御装置は、前記エンジンの実回転数が前記設定回転数以下の第2の設定回転数より低く、かつ、実車速が前記許容車速以下の設定車速より低くなったとき、または、アクセルペダルが踏み込まれたときに、前記排気ブレーキを解除するように前記排気調整機構を制御する、請求項1または2に記載の建設機械。
- 前記少なくとも1つの油圧ポンプは、ファン用ポンプを含み、
前記ファン用ポンプから作動油が供給される、前記エンジンを冷却するためのファン用モータと、
前記ファン用モータの回転数を設定するファン回路と、をさらに備え、
前記制御装置は、前記第1降坂条件または前記第2降坂条件が成立する場合には、前記ファン用モータの回転数を所定値以上とするように前記ファン回路を制御する、請求項1〜3のいずれか一項に記載の建設機械。 - 前記少なくとも1つの油圧ポンプは、メインポンプを含み、
前記メインポンプから荷役回路を経てタンクへ至る循環ラインと、
前記荷役回路よりも上流側で前記循環ラインから分岐してタンクへ至る、リリーフ弁が設けられた逃がしラインと、
前記逃しラインの分岐点よりも下流側で前記循環ラインに設けられた開閉弁と、をさらに備え、
前記制御装置は、前記第1降坂条件または前記第2降坂条件が成立する場合には、前記循環ラインを遮断するように前記開閉弁を制御する、請求項1〜4のいずれか一項に記載の建設機械。 - 流体継手であるトルクコンバータおよび変速機を介して前記エンジンと連結された車輪と、
前記トルクコンバータの出力軸を入力軸と拘束するか否かを切り換えるロックアップ装置と、をさらに備え、
前記制御装置は、前記第1降坂条件または前記第2降坂条件が成立する場合には、前記トルクコンバータの出力軸が入力軸と拘束されるように前記ロックアップ装置を制御する、請求項1〜5のいずれか一項に記載の建設機械。 - 前記エンジンと接続された圧縮機およびタービンを含むターボチャージャをさらに備え、
前記タービンは、可変ノズルタービンであり、
前記排気調整機構は、前記タービンのノズルの開度を変更することによって前記エンジンからの排気の流量を調整するものである、請求項1〜6のいずれか一項に記載の建設機械。
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