JPH0321537U - - Google Patents
Info
- Publication number
- JPH0321537U JPH0321537U JP8291189U JP8291189U JPH0321537U JP H0321537 U JPH0321537 U JP H0321537U JP 8291189 U JP8291189 U JP 8291189U JP 8291189 U JP8291189 U JP 8291189U JP H0321537 U JPH0321537 U JP H0321537U
- Authority
- JP
- Japan
- Prior art keywords
- prime mover
- rotation speed
- operating
- operating means
- neutral position
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims 5
- 238000010276 construction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Description
第１図はクレーム対応図である。第２図および
第３図は本考案をホイール式油圧シヨベルに適用
した場合の一実施例であり、第２図はその全体構
成図、第３図はその処理手順例を示すフローチヤ
ート、第４図は他の実施例を示すフローチヤート
である。
１：油圧ポンプ、２，１１，１５：油圧パイロ
ツト式制御弁、４：油圧モータ、６：パイロツト
弁、６ａ：走行ペダル、１２，１６：作業用アク
チユエータ、１３，１７：パイロツト弁、１３ａ
，１７ａ：操作レバー、１４：油圧ポンプ、２１
：エンジン、２１ａ：ガバナ、２３：パルスモー
タ、２５：ポテンシヨメータ、３０：制御回路、
３１：圧力スイツチ、３２，３３：リミツトスイ
ツチ、３４：エンジン回転数設定器、３５：選択
スイツチ、１００：原動機、１０１：油圧ポンプ
、１０２：油圧アクチユエータ、１０３：弁手段
、１０４：操作部材、１０５：設定回転数指令手
段、１０６：回転数制御手段、１０７：検出手段
、１０８：判定手段、１０９：計時手段。
FIG. 1 is a complaint correspondence diagram. 2 and 3 show an example in which the present invention is applied to a wheeled hydraulic excavator. FIG. 2 is an overall configuration diagram thereof, FIG. 3 is a flowchart showing an example of its processing procedure, and FIG. The figure is a flowchart showing another embodiment. 1: Hydraulic pump, 2, 11, 15: Hydraulic pilot type control valve, 4: Hydraulic motor, 6: Pilot valve, 6a: Travel pedal, 12, 16: Working actuator, 13, 17: Pilot valve, 13a
, 17a: Operation lever, 14: Hydraulic pump, 21
: Engine, 21a: Governor, 23: Pulse motor, 25: Potentiometer, 30: Control circuit,
31: Pressure switch, 32, 33: Limit switch, 34: Engine speed setting device, 35: Selection switch, 100: Prime mover, 101: Hydraulic pump, 102: Hydraulic actuator, 103: Valve means, 104: Operating member, 105: Set rotation speed command means, 106: rotation speed control means, 107: detection means, 108: determination means, 109: time measurement means.
Claims (1)
される少なくとも一つの油圧アクチユエータと、 前記油圧アクチユエータの作動を制御する弁手
段と、 前記油圧アクチユエータに対応して設けられ前
記弁手段を操作して前記油圧アクチユエータの作
動を制御する操作手段と、 前記原動機の設定回転数を任意に指令する設定
回転数指令手段と、 指令された設定回転数になるように前記原動機
を制御する原動機制御手段とを具備する油圧式建
設機械の原動機回転数制御装置において、 前記操作手段が中立位置にあるか否かを検出す
る検出手段と、 該検出手段からの検出結果に基づいて、前記操
作手段の少なくとも一つが操作位置にあるか全部
が中立位置にあるかを判定する判定手段と、 該判定手段が前記操作手段の全部が中立位置に
あると判定するのに応答して計時を開始する計時
手段と、 この計時時間と前記設定回転数とに応じて前記
原動機回転数の制御速度を演算する演算手段とを
備え、 前記原動機制御手段は、前記判定手段が少なく
ともいずれか一つの操作手段が操作位置にあると
判定したときには、前記原動機の回転数を前記設
定回転数となるように制御し、前記判定手段が前
記操作手段の全部が中立位置にあると判定したと
きには、前記演算された制御速度に基づき、計時
時間が長くなるほど速い速度で前記原動機の回転
数を低減することを特徴とする油圧式建設機械の
原動機回転数制御装置。[Claims for Utility Model Registration] A hydraulic pump driven by a prime mover; at least one hydraulic actuator driven by pressure oil discharged from the hydraulic pump; valve means for controlling the operation of the hydraulic actuator; an operating means that is provided corresponding to the hydraulic actuator and controls the operation of the hydraulic actuator by operating the valve means; a set rotation speed command means that arbitrarily commands a set rotation speed of the prime mover; and a commanded set rotation speed. A prime mover rotation speed control device for a hydraulic construction machine, comprising: a prime mover control means for controlling the prime mover so that the operating means is in a neutral position; and a detecting means for detecting whether the operating means is in a neutral position. determining means for determining whether at least one of the operating means is in the operating position or all of the operating means are in the neutral position, based on a detection result from the operating means; and the determining means determines that all of the operating means are in the neutral position. and a calculation means for calculating a control speed of the prime mover rotation speed according to the measured time and the set rotation speed, and the prime mover control means is configured to perform the determination. When the means determines that at least one of the operating means is in the operating position, the number of revolutions of the prime mover is controlled to be the set number of revolutions, and the determining means determines that all of the operating means are in the neutral position. A prime mover rotation speed control device for a hydraulic construction machine, characterized in that when it is determined that the rotation speed of the prime mover is reduced based on the calculated control speed, the rotation speed of the prime mover is reduced as the time period increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989082911U JP2557240Y2 (en) | 1989-07-14 | 1989-07-14 | Engine speed control device for hydraulic construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989082911U JP2557240Y2 (en) | 1989-07-14 | 1989-07-14 | Engine speed control device for hydraulic construction machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0321537U true JPH0321537U (en) | 1991-03-04 |
| JP2557240Y2 JP2557240Y2 (en) | 1997-12-10 |
Family
ID=31630136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989082911U Expired - Fee Related JP2557240Y2 (en) | 1989-07-14 | 1989-07-14 | Engine speed control device for hydraulic construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2557240Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62191638A (en) * | 1986-02-19 | 1987-08-22 | Komatsu Ltd | Method for controlling engine with automatic deceleration device |
-
1989
- 1989-07-14 JP JP1989082911U patent/JP2557240Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62191638A (en) * | 1986-02-19 | 1987-08-22 | Komatsu Ltd | Method for controlling engine with automatic deceleration device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2557240Y2 (en) | 1997-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |