JPH02125032A - Minimum discharge control method for hydraulic pump and device therefor - Google Patents
Minimum discharge control method for hydraulic pump and device thereforInfo
- Publication number
- JPH02125032A JPH02125032A JP63275469A JP27546988A JPH02125032A JP H02125032 A JPH02125032 A JP H02125032A JP 63275469 A JP63275469 A JP 63275469A JP 27546988 A JP27546988 A JP 27546988A JP H02125032 A JPH02125032 A JP H02125032A
- Authority
- JP
- Japan
- Prior art keywords
- minimum discharge
- hydraulic pump
- discharge amount
- work
- mode
- 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
Links
- 238000000034 method Methods 0.000 title claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 19
- 230000004043 responsiveness Effects 0.000 claims description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 241000087799 Koma Species 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
- E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
-
- 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
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は油圧式掘削機械の作業機アクチュエータに作動
油を供給する油圧ポンプの最小吐出量を、整正作業等の
ように微操作及び省エネルギを必要とするモードでは小
さくし、重掘削作業等のように応答性を必要とするモー
ドでは大きく設定して、各作業毎に最も適した最小吐出
量になるよう切Ｑ ＩＪえて作業することにより作業効
率、操作性、経済性を向−ヒさせたことを特徴とする油
圧ポンプの最小吐出量制御方法及び装置に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention is designed to control the minimum discharge amount of a hydraulic pump that supplies hydraulic oil to the working machine actuator of a hydraulic excavation machine by finely controlling and saving it during straightening work, etc. Set it to a small value in modes that require energy, and set it to a large value in modes that require responsiveness such as heavy excavation work, and adjust the QIJ to achieve the most suitable minimum discharge amount for each task. The present invention relates to a method and apparatus for controlling the minimum discharge amount of a hydraulic pump, which is characterized by improved work efficiency, operability, and economy.
（従来の技術）
従来、この種油圧ポンプの最小吐出量は、油圧ポンプ、
切り替えバルブ、作業機アクチュエータ等の油漏れを補
う量の他に、作業機レバーにより流量制御弁を操作して
１′Ｆ５業機アクチュエータに作動油を供給すると、該
供給油量に応じた吐出量となるように油圧ポンプの傾転
角制御が行われるが、該傾転角制御装置等の慣性が大き
いことによる油圧ポンプ吐出量制御の応答遅れを防ぐた
め、作業時でない時で６前記油漏れ量を補充する分に比
べ相当大きい油圧ポンプ最小吐出量を維持させておく必
要があった。(Prior art) Conventionally, the minimum discharge amount of this type of hydraulic pump is
In addition to the amount to compensate for oil leaks from switching valves, work equipment actuators, etc., when operating the flow rate control valve with the work equipment lever and supplying hydraulic oil to the 1'F5 industry equipment actuator, the discharge amount is proportional to the supplied oil amount. The tilting angle of the hydraulic pump is controlled so that the tilting angle control device, etc. has a large inertia, which causes a delay in the response of the hydraulic pump discharge amount control. It was necessary to maintain a minimum discharge volume of the hydraulic pump, which was considerably larger than the amount required to replenish the volume.
（発明が解決しようとする課１ｍ）
前記従来の技術に於ては、油圧式掘削機械による重掘削
等１重負荷時でも十分高い応答性を得ようとすると、油
圧ポンプの最小吐出量をかなり大きく設定する必要があ
った。しかし、油圧ポンプの最小吐出量を作業時でない
ときでも大きくすることは省エネルギ的に不利であり、
且つ整正作業等の微操イヤ時に於ける最小作業機速度が
早くなり、操作性を低下させる欠点があった。又、前記
理由により油圧ポンプの最小吐出量を少なくすると重掘
削時に於ける作業機の応答性が遅く作業効率の低下を招
く欠点があった即ち、外業機の応答性と、省エネルギー
及び微操４ｔ＝性は…反するように１￥：用するため、
両方をある程度犠牲にし、たポンプ最小吐出量を設定せ
ざるを得なかった。(Issue 1m to be solved by the invention) In the above-mentioned conventional technology, in order to obtain sufficiently high responsiveness even under a single load such as heavy excavation with a hydraulic excavation machine, the minimum discharge amount of the hydraulic pump must be considerably reduced. It needed to be set large. However, increasing the minimum discharge amount of a hydraulic pump even when it is not working is disadvantageous in terms of energy conservation.
In addition, there is a drawback that the minimum working machine speed becomes faster when fine manipulation is required, such as in straightening work, which reduces operability. Furthermore, for the reasons mentioned above, reducing the minimum discharge rate of the hydraulic pump has the disadvantage that the response of the working machine during heavy excavation is slow, leading to a decrease in work efficiency. 4t=gender...contrary to 1 yen: to use,
We had no choice but to sacrifice both to some extent and set a minimum pump discharge amount.
（課題を解決するための手段）
本発明は前記従来の技術に於ける課題を解決するために
成されたもので、第ｆｌ）のｊ求項では、油圧式掘削機
械の作業機アクチュエータに作動油を供給する油圧ポン
プの最小吐出量を、整正作業等の微操作を必要とするモ
ードでＣ１を小さくして操作性及び省エネルギー性を向
上させ、重掘削作業等の応答性を必要とするモードでは
大きくして作業性を向上させるよう、作業モードにより
切り替え制御することを特徴とする油圧ポンプの最小吐
出？制御方法により、第（２）の請求項では、油圧式掘
ａＩＩ機械の作業機アクチュエータに作動油を供給する
油圧ポンプと、該油圧ポンプの最小吐出量制御装置と、
イ乍業モード切り替え装置とを備え、前記ｆヤ業モード
切り替え装置よりモード信号を入力すると、それに応じ
た切り替え信号を油圧ポンプの最小吐出量制御装置に出
力するコントローラより構成されることを特徴とする油
圧ポンプの最小吐出量制御装置により、第（３）の請求
項は、第（１）の１重求項に於て整正作業等の微操作を
必要とするモード又は重掘削作業等の応答性を必要とす
るモードに於て油圧ポンプの最小吐出量を複数段に設定
することを特徴とする油圧ポンプの最小吐出量制御方法
により目的を達成するようにした。(Means for Solving the Problems) The present invention has been made to solve the problems in the above-mentioned conventional technology. The minimum discharge amount of the hydraulic pump that supplies oil is reduced by C1 in modes that require fine operations such as straightening work to improve operability and energy saving, and responsiveness is required for heavy excavation work etc. What is the minimum discharge of a hydraulic pump that is characterized by switching control depending on the work mode so that it increases in the mode and improves work efficiency? According to the control method, the second claim provides a hydraulic pump for supplying hydraulic oil to a working machine actuator of a hydraulic excavation aII machine, a minimum discharge amount control device for the hydraulic pump,
and a controller for outputting a corresponding switching signal to the minimum discharge amount control device of the hydraulic pump when a mode signal is input from the work mode switching device. According to the minimum discharge amount control device of a hydraulic pump, claim (3) is applicable to modes that require fine operations such as straightening work or heavy excavation work, etc. in the single claim of (1). The object is achieved by a method for controlling the minimum discharge amount of a hydraulic pump, which is characterized in that the minimum discharge amount of the hydraulic pump is set in multiple stages in a mode that requires responsiveness.
（作用）
前記構成による時は次のように作用する。掘削ｆヤ業に
於ける整正作業等のように微操ｆ−トを必要とする作業
モードに於ては、作業モード切り替え装置により該ｆヤ
業モードを選定すると、該イヤ業モード信号が、油圧ポ
ンプ最小吐出量制御装置を制御するコントローラに出力
さね、ることにより油圧ポンプは低最小吐出量に制御さ
れる。(Operation) When the above configuration is used, the operation is as follows. In work modes that require fine control, such as straightening work in excavation work, when the work mode is selected by the work mode switching device, the ear work mode signal is activated. , the hydraulic pump is output to a controller that controls the hydraulic pump minimum discharge amount control device, thereby controlling the hydraulic pump to a low minimum discharge amount.
１足って油圧式掘削機械の作業機アクチュエータの最小
速度を小さくすることができるので微操作が可能となる
と共に、非作業時に於ける油圧ポンプの吐出量も小さく
できるので省エネルギー効果が大きい。又、重掘削イヤ
業等の応答性を必要とする作業モードに於ては、作業モ
ード切り替え装置により該作業モードを選定すると、該
作業モー ド信号が、油圧ポンプ最小吐出ｆｆｉ制御装
置を制御するコントローラに出力されることにより油圧
ポンプは高最小吐出歌に制御さｈ−る。従って非作業時
に於ける油圧ポンプの吐出量が大きくなり省エネルギー
の効果は少ないが油圧掘削機械の作業機アクチュエータ
を操作したときのｆヤ業機の応答性が向上する。又、１
つの作業モードで複数段の油圧ポンプ最小吐出量を設定
すれば作業機レバーの操ｆや量に応じて複数段の最小吐
出量が得られる。尚、本発明は微操作性を必要とする作
業モードと、応答性を必要とする作業モードに限るもの
ではなく、必要に応じてイヤ業モードを追加して、各作
業モードに適した油圧ポンプの最小吐出量を設定するこ
とができろ。Since the minimum speed of the work equipment actuator of the hydraulic excavation machine can be reduced by one foot, fine operation is possible, and the discharge amount of the hydraulic pump during non-operation can also be reduced, resulting in a large energy saving effect. In addition, in a work mode that requires responsiveness such as heavy excavation, when the work mode is selected by the work mode switching device, the work mode signal controls the hydraulic pump minimum discharge ffi control device. The hydraulic pump is controlled to a high minimum displacement by the output to the controller. Therefore, the discharge amount of the hydraulic pump increases during non-working periods, and although the effect of energy saving is small, the responsiveness of the excavating machine when operating the working machine actuator of the hydraulic excavating machine is improved. Also, 1
By setting the hydraulic pump minimum discharge amount in multiple stages in one work mode, the minimum discharge amount in multiple stages can be obtained in accordance with the operation f and amount of the work machine lever. Note that the present invention is not limited to work modes that require fine operability and work modes that require responsiveness, but an ear work mode can be added as necessary to create a hydraulic pump suitable for each work mode. Can set the minimum discharge amount.
（実施例）
以下、本発明の実施例を添付図面により詳述する。第１
図（Ａ）は本発明の第１実施例に於ける油圧ポンプの最
小吐出量制御装置を示す図で１は作業機レバー、２は電
気信号変換装置、３はコントローラで、３ａは前記電気
信号変換装置２から入力した作業機レバー１のストロー
クに欠（応する電圧信号を所定のパターンに変換するた
めの信号変換装置、３ｂは信号変換装置３ａからの信号
を変換して流量制御弁７のソレノイド５６へ電流信号を
出力するための操作信号変換発生装置、３Ｃは前記信号
変換装置３ａからの信号と、イヤ業モード切り替え装置
４からの作業モード信号により油圧ポンプ最小吐出量信
号を設定して油圧ポンプ吐出量を制御する電流信号をポ
ンプ吐出量可変装置の制御弁９のソレノイド９ａへ出力
する最小吐出量設定装置、８は前記制御弁９の油圧源、
１０は油圧ポンプ１２の吐出量制御装置１１を制御する
ための、中立ばｂｌｏａを備えた制御シリンダ、１３は
前記流量制御弁７の供給ボート上流に設けた逆止弁、１
４はブーム、アーム、バケ・ソト等の作業機アクチュエ
ータとしてのシリンダである。次に作用について説明す
るオペレータが、例えばブームを操作するためにブーム
レバー１を操作すると、該ブームレバー１の操作量に応
じた電気信号が電気信号変換装置２からコントローラ３
の信号変換装置３ａに出力され、第１図＜Ａ）に示すよ
うなレバーストローク信号に応じた電圧信号に変換され
る。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings. 1st
Figure (A) is a diagram showing a minimum discharge amount control device for a hydraulic pump in a first embodiment of the present invention, in which 1 is a working machine lever, 2 is an electric signal converter, 3 is a controller, and 3a is a control device for controlling the electric signal. A signal converter 3b converts a voltage signal corresponding to the stroke of the work equipment lever 1 inputted from the converter 2 into a predetermined pattern. The operation signal conversion and generation device 3C for outputting a current signal to the solenoid 56 sets a hydraulic pump minimum discharge amount signal based on the signal from the signal conversion device 3a and the work mode signal from the ear work mode switching device 4. a minimum discharge amount setting device that outputs a current signal for controlling the hydraulic pump discharge amount to the solenoid 9a of the control valve 9 of the pump discharge amount variable device; 8 is a hydraulic power source for the control valve 9;
10 is a control cylinder equipped with a neutral valve for controlling the discharge amount control device 11 of the hydraulic pump 12; 13 is a check valve provided upstream of the supply boat of the flow rate control valve 7;
4 is a cylinder as an actuator for working machines such as booms, arms, buckets, etc. Next, when the operator operates the boom lever 1 to operate the boom, an electric signal corresponding to the operation amount of the boom lever 1 is transmitted from the electric signal converter 2 to the controller 3.
The signal is output to the signal conversion device 3a, and is converted into a voltage signal corresponding to the lever stroke signal as shown in FIG. 1<A).
前記信号変換装置３ａからの信号が作業機を操作するた
めの操作信号変換発生装置３ｂに入力されると５花信号
はレバーストロークに応じたソレノイドを流に変換され
て流量制御弁７のソレノイド５又は６へ出力される。一
方前記信号変換装置３８からの信号が油圧ポンプ１２の
最小吐出量設定装ｍ３ｃに入力すると、例えば作業モー
ド切り替え装置ｉ４を整正作業モードＳに設定した場合
は、該整正１ヤ業モ一ド信号により前記信号変換装置３
ａから入力された信号は第１図（Ａｌに示されるように
レバーストロークＳ０．〜Ｓ、１までは最小吐出量とな
る電流値！。に設定さｔし、レバーストロークＳｇ＋〜
Ｓ、及びＳ １１２〜Ｓ、迄は低最小吐出量Ｓとなる電
流値■１に設定され、そｈ 以外ではレバーストローク
にリニヤ−な電流信号となるように設定される。尚前記
電流値ｌ。When the signal from the signal conversion device 3a is input to the operation signal conversion and generation device 3b for operating the working machine, the signal 5 is converted into a flow from the solenoid according to the lever stroke, and the solenoid 5 of the flow control valve 7 is converted into a flow. Or output to 6. On the other hand, when the signal from the signal conversion device 38 is input to the minimum discharge amount setting device m3c of the hydraulic pump 12, for example, when the work mode switching device i4 is set to the straightening work mode S, The signal conversion device 3
The signal input from a is set to the current value that is the minimum discharge amount up to the lever stroke S0.~S, 1 as shown in Figure 1 (Al), and the lever stroke Sg+~
S, and S112 to S, the current value is set to 1 which gives a low minimum discharge amount S, and other than that, the current value is set so that the current signal is linear with the lever stroke. Note that the current value l.
、］１及びレバーストロークにリニヤ−な電流信号はブ
ームレバーｌの向きに関係なく同じ値に設定される。従
って前記ブームレバー１のストロークに応じて電流信号
Ｔ−，Ｉ＋又はレバーストロークにリニヤ−な電流信号
が制御弁９のソレノイド９ａに入力されるので油圧源８
から制御シリンダ１０に供給される油圧を前記を原信号
に応じた値になるように制御する。又ｆヤ業モード切り
替え装置・１を重掘削モードＧに設定した場合は、前記
整正作業モード同様ブームレバー１を５１１２〜Ｓ、及
びＳ、＋１〜Ｓ３まで操作する間は油圧ポンプＩ２の最
小吐出量が高最小吐出量Ｇとなる電流信号Ｉ、が制御弁
９のソレノイド９ａに入力されるので油圧源８から制御
シリンダ１０に供給される油圧を前記高最小吐出量Ｇに
なるよう制御する。前記の如く制御さｔして油圧ポンプ
１２から流量制御弁７に供給されたイヤ動油のうち、前
記操作信号変換発生装置３ｂがら流量制御弁７のソレノ
イド５または６に出力された電流信号に応じて流量制御
弁７のスプールが移動することにより前記電流信号に応
じた油量だけがブ・−ムシｌシダ１４に供給されてブー
ムシリンダ１４のピストンロッド１４ａをＰ又はＱの方
向に１や動じてブームを上下動する。尚前記整正モード
あるいは重掘削モードに於て、それぞれ最小吐出量電流
信号！。及び１１あるいはＩｏ及び１．のように二段と
したが一段設定であってもよいことは勿論である。第１
図（Ｂ）は本発明の第２実施例を示す図で、第１図（Ａ
）に於ける流量制御弁７の代わりにソレノイド９ａによ
り制御されるチエツク弁８ａ、８ｂ及びソレノイ１：９
ｂにより制御されるチエツク弁８ｃ、８ｄを使用し、第
１実施例におけるソレノイド５及び６への電気信号をそ
れぞれソレノイド９ａ及び９ｂに出力するほがは第１実
施例と同様である。第２図（Ａ＞は前記第１図（Ａ）の
最小吐出ｆｆｉ設定装置３ｃに於ける一定電流値を■。, ]1 and the current signal linear to the lever stroke are set to the same value regardless of the orientation of the boom lever l. Therefore, depending on the stroke of the boom lever 1, a current signal T-, I+ or a current signal linear with the lever stroke is input to the solenoid 9a of the control valve 9, so that the hydraulic power source 8
The hydraulic pressure supplied from the control cylinder 10 to the control cylinder 10 is controlled to a value corresponding to the original signal. In addition, when the machine work mode switching device 1 is set to heavy excavation mode G, the minimum hydraulic pump I2 is set to Since the current signal I whose discharge amount becomes the high minimum discharge amount G is input to the solenoid 9a of the control valve 9, the hydraulic pressure supplied from the oil pressure source 8 to the control cylinder 10 is controlled so that it becomes the high minimum discharge amount G. . Of the hydraulic fluid controlled as described above and supplied from the hydraulic pump 12 to the flow rate control valve 7, a current signal output from the operation signal conversion and generation device 3b to the solenoid 5 or 6 of the flow rate control valve 7 is used. By moving the spool of the flow rate control valve 7 accordingly, only the amount of oil corresponding to the current signal is supplied to the boom cylinder cylinder 14, and the piston rod 14a of the boom cylinder 14 is moved in the P or Q direction. Move the boom up and down. In addition, in the above-mentioned adjustment mode or heavy excavation mode, the minimum discharge amount current signal! . and 11 or Io and 1. Of course, it is possible to use a single-stage setting instead of the two-stage setting as shown in FIG. 1st
Figure (B) is a diagram showing the second embodiment of the present invention, and Figure 1 (A
) in which check valves 8a, 8b and solenoids 1:9 are controlled by solenoids 9a instead of flow control valves 7.
This embodiment is similar to the first embodiment except that the check valves 8c and 8d controlled by the valves 8c and 8d in the first embodiment are used and the electrical signals to the solenoids 5 and 6 in the first embodiment are outputted to the solenoids 9a and 9b, respectively. FIG. 2 (A>) represents the constant current value in the minimum discharge ffi setting device 3c of FIG. 1 (A).
及び■、の二段に設定した整正モードの場合に於けるレ
バーストロークＳに対するポンプ吐出量Ｑの関係を示し
た図である。第２図（Ａ）に於て、レバーストロークＳ
０までは最小吐出ｆｆ１Ｑ、に設定され、レバーストロ
ークＳ１までは低最小吐出量Ｑ、に設定されるが、レバ
ーストロークＳ３以上ではポンプ吐出量Ｑがレバースト
ロークＳと共に増加するように制御される。又、第１図
（Ａ）の最小吐出量設定装置３ｃに於て一定電流を１゜
及びＩ、の二段に設定した重掘削モードの場合は低最小
吐出ｆｆ１Ｑ、の代わりにレバーストロークＳ、まで高
最小吐出量Ｑ、に設定される。第２図（Ｂ）及び（Ｃ）
は第２図（Ａ）に於ける整正モードの場合の作業機ン・
く−操作時間に対するポンプ吐出量及びレバーストロー
クの関係を示す図である。第２図（Ｃ）に於て作業機レ
バー１を時間ｔｏまでにレバーストロークＳ。FIG. 3 is a diagram showing the relationship between the pump discharge amount Q and the lever stroke S in the case of the adjustment mode set to two stages, 2 and 3. In Figure 2 (A), lever stroke S
The pump discharge amount Q is set to the minimum discharge amount Q up to 0, and the low minimum discharge amount Q is set up to the lever stroke S1. In addition, in the case of the heavy excavation mode in which the constant current is set in two stages of 1° and I in the minimum discharge amount setting device 3c of FIG. 1(A), the lever stroke S, The minimum discharge amount Q is set up to a high minimum discharge amount Q. Figure 2 (B) and (C)
is the working machine in the straightening mode in Fig. 2 (A).
FIG. 3 is a diagram showing the relationship between pump discharge amount and lever stroke with respect to pump operation time. In FIG. 2(C), the working machine lever 1 is moved to a lever stroke S by time to.
まで操作する間、（Ｂ）に於けるポンプ吐出量はＱ、を
推持し、時間ｔ、までにレバーストロークをＳ、に操作
する間、（Ｂ）に於けるポンプ吐出量はＱ、を維持し、
操作時間ｔ２までにレバーストロークをＳ、まで操（９
すれば（Ｂ）に於けるポンプ吐出量はＱ、まで増加する
。次に（Ｃ）に於て作業機レバーｌを時間ｔ、までにレ
バーストロークＳまで操１ヤすれば、（Ｂ）に於けるポ
ンプ吐出量はＱ、まで減少し１時１ｕ’ＪｔＧまでにレ
バーストロクをニュートラルにしても、（３）に於ける
ポンプ吐出量は時間ｔ、までＱｌを維持しその後時間ｔ
０だけＱ、を維持した１１０．まで減少するよう制御さ
れる。While operating the lever to S, the pump discharge amount in (B) is maintained at Q, and while operating the lever stroke to S by time t, the pump discharge amount in (B) is maintained at Q. maintain,
Operate the lever stroke to S by operation time t2 (9
Then, the pump discharge amount in (B) increases to Q. Next, in (C), if the work equipment lever l is operated to the lever stroke S by time t, the pump discharge amount in (B) will decrease to Q, and by 1:1u'JtG. Even if the lever stroke is set to neutral, the pump discharge amount in (3) maintains Ql until time t, and then reaches time t.
110. Maintained Q by 0. controlled to decrease to
（発明の効果）
以Ｅ詳述した々口く、本発明によるときは次の効果を奏
する。(Effects of the Invention) As described in detail below, the present invention provides the following effects.
（］）整正ｆヤ業等の微操作を必要とする作業では油圧
ポンプの最小吐出量を小さくしたので作業機アクチュエ
ータの最小速度が小さくなり操作性が向上すると共に、
非作業時に於ける省エネルギー効果が大きい。(]) For work that requires fine operations such as straightening work, the minimum discharge volume of the hydraulic pump has been reduced, which reduces the minimum speed of the work equipment actuator and improves operability.
Great energy saving effect when not working.
（２）重掘削作業等の応答性を必要とする作業では油圧
ポンプの最小吐出量を大きくしたので非生業時に於ける
省エネルギー効果はないが作業機を操作したときの応答
性が高く１ヤ業性効率を向上させることができる。(2) For work that requires responsiveness such as heavy excavation work, the minimum discharge volume of the hydraulic pump has been increased, so there is no energy saving effect when not working, but the responsiveness when operating the work equipment is high and it can be used for one-way work. It can improve sexual efficiency.
第１図（Ａ＞は本発明の第１実施例に於ける電気・油圧
回路を示す図、第１図（Ｂ）は本発明の狛２実施ρ１を
示す図、第２図（Ａ）は本発明ニ於けるレバーストロー
クとポンプ吐出量の関係を示す図、同じく（Ｂ）は作業
機レバー操作時間とポンプ吐出量の関係を示す図、同じ
く（Ｃ）は作業機レバー操作時間とレバーストロークの
関係を示す図である。
ｌ・・・・・作文機レバー
２・・・・・電気信号変換装置
３・・・・・コントローラ、 ３ａ・・・・・信号
変換′Ａ石３ｂ・・・・・操作信号変換発生装置
３ｃ・・・・・最小吐出量設定装置
４・・・・・作業モード切り替え装置
５．６・・・・ソレノイド、 ７・・・・・流量制御
弁８・・・・・油圧源、 ８ａ〜８ｄ・・・チ
エツク弁９・・・・・制御弁 ９ａ、９ｂ・・・
ソレノイド１０・・・・・制御シリンダ
１１・・・・・吐出量制御袋ｍ、１２・・・・・油圧ポ
ンプ１３・・・・・逆止弁 １４・・・・・シ
リンダ。
ｌ５・
・・・タンクFIG. 1 (A> is a diagram showing the electric/hydraulic circuit in the first embodiment of the present invention, FIG. 1 (B) is a diagram showing the Koma 2 implementation ρ1 of the present invention, and FIG. 2 (A) is a diagram showing the electric/hydraulic circuit in the first embodiment of the present invention. A diagram showing the relationship between the lever stroke and the pump discharge amount in the present invention, (B) is a diagram showing the relationship between the work equipment lever operation time and the pump discharge amount, and (C) is a diagram showing the relationship between the work equipment lever operation time and the lever stroke. It is a diagram showing the relationship between: l...Composition machine lever 2...Electric signal conversion device 3...Controller, 3a...Signal conversion 'A stone 3b... ...Operation signal conversion generator 3c...Minimum discharge amount setting device 4...Work mode switching device 5.6...Solenoid, 7...Flow rate control valve 8... ...Hydraulic power source, 8a-8d...Check valve 9...Control valve 9a, 9b...
Solenoid 10...Control cylinder 11...Discharge amount control bag m, 12...Hydraulic pump 13...Check valve 14...Cylinder. l5...tank
Claims (3)
を供給する油圧ポンプの最小吐出量を、整正作業等の微
操作を必要とするモードでは小さくして操作性及び省エ
ネルギ性を向上させ、重掘削作業等の応答性を必要とす
るモードでは大きくして作業性を向上させるよう、作業
モードにより切り替え制御することを特徴とする油圧ポ
ンプの最小吐出量制御方法。(1) The minimum discharge amount of the hydraulic pump that supplies hydraulic oil to the work equipment actuator of hydraulic excavation machinery is reduced in modes that require fine operations such as straightening work to improve operability and energy savings. A method for controlling the minimum discharge amount of a hydraulic pump, characterized in that switching control is performed depending on the work mode so as to increase the responsiveness in a mode that requires responsiveness such as heavy excavation work to improve work efficiency.
を供給する油圧ポンプと、該油圧ポンプの最小吐出量制
御装置と、作業モード切り替え装置とを備え、前記作業
モード切り替え装置よりモード信号を入力すると、それ
に応じた切り替え信号を油圧ポンプの最小吐出量制御装
置に出力するコントローラより構成されることを特徴と
する油圧ポンプの最小吐出量制御装置。(2) A hydraulic pump that supplies hydraulic oil to a work equipment actuator of a hydraulic excavation machine, a minimum discharge amount control device for the hydraulic pump, and a work mode switching device, and a mode signal is input from the work mode switching device. A minimum discharge amount control device for a hydraulic pump, comprising a controller that outputs a corresponding switching signal to the minimum discharge amount control device for a hydraulic pump.
要とするモード又は重掘削作業等の応答性を必要とする
モードに於て油圧ポンプの最小吐出量を複数段に設定す
ることを特徴とする油圧ポンプの最小吐出量制御方法。(3) In claim (1), the minimum discharge amount of the hydraulic pump is set in multiple stages in a mode that requires fine operations such as straightening work or a mode that requires responsiveness such as heavy excavation work. A method for controlling the minimum discharge amount of a hydraulic pump, characterized in that the minimum discharge amount is set to .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63275469A JP2601705B2 (en) | 1988-10-31 | 1988-10-31 | Hydraulic circuit of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63275469A JP2601705B2 (en) | 1988-10-31 | 1988-10-31 | Hydraulic circuit of excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02125032A true JPH02125032A (en) | 1990-05-14 |
| JP2601705B2 JP2601705B2 (en) | 1997-04-16 |
Family
ID=17555975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63275469A Expired - Fee Related JP2601705B2 (en) | 1988-10-31 | 1988-10-31 | Hydraulic circuit of excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601705B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0812964A1 (en) * | 1996-06-12 | 1997-12-17 | Shin Caterpillar Mitsubishi Ltd. | Hydraulic actuator operation controller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6120901U (en) * | 1984-07-12 | 1986-02-06 | 住友重機械工業株式会社 | Pump control circuit for cranes, etc. |
-
1988
- 1988-10-31 JP JP63275469A patent/JP2601705B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6120901U (en) * | 1984-07-12 | 1986-02-06 | 住友重機械工業株式会社 | Pump control circuit for cranes, etc. |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0812964A1 (en) * | 1996-06-12 | 1997-12-17 | Shin Caterpillar Mitsubishi Ltd. | Hydraulic actuator operation controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2601705B2 (en) | 1997-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2525233B2 (en) | Work equipment teaching / playback method | |
| JP3106164B2 (en) | Hydraulic drive method and hydraulic drive device for hydraulic machine | |
| JPH0586635A (en) | Work oil quantity switching controller for hydraulic excavator | |
| JPH0530251U (en) | Fine operation mode switching device in hydraulic excavator | |
| US11105348B2 (en) | System for controlling construction machinery and method for controlling construction machinery | |
| JPH08209751A (en) | Hydraulic flow priority system | |
| JP2005061477A (en) | Hydraulic driving device | |
| KR20200048050A (en) | Travel contorl system for construction machinery and travel control method for construction machinery | |
| JPH09177136A (en) | Hydraulic control system of hydraulic operation machine | |
| JPH0694007A (en) | Controller of hydraulic drive machine | |
| JPH102303A (en) | Operation control device for hydraulic actuator | |
| JP4979014B2 (en) | Control system for swivel pump in hydraulic excavator | |
| JPH04194405A (en) | Separation/confluence selecting device for plural pump in load sensing system | |
| US10982691B2 (en) | System and method for controlling construction machine | |
| JPH0763203A (en) | Hydraulic drive device of hydraulic machine | |
| JPH02125032A (en) | Minimum discharge control method for hydraulic pump and device therefor | |
| CN109058195B (en) | Hydraulic control system of rescue equipment and rescue equipment | |
| JP3554122B2 (en) | Hydraulic circuit device for work machines | |
| Huova et al. | Open-loop independent metering control of a multi-dof forwarder boom | |
| JPS58204234A (en) | Oil-pressure circuit for oil-pressure type excavator | |
| CN220227328U (en) | Hydraulic system of hydraulic rock drilling machine | |
| JPH0798001A (en) | Direction and speed controller for hydraulic actuator | |
| JP3064520B2 (en) | Working oil amount switching control device for hydraulic excavator | |
| CN115012467B (en) | Excavator rotary platform and working device action matching control system | |
| JPH0366901A (en) | Compensation controller of actuation oil quantity for operation valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |