JPS57161303A - Oil hydraulic circuit controller - Google Patents

Oil hydraulic circuit controller

Info

Publication number
JPS57161303A
JPS57161303A JP4538781A JP4538781A JPS57161303A JP S57161303 A JPS57161303 A JP S57161303A JP 4538781 A JP4538781 A JP 4538781A JP 4538781 A JP4538781 A JP 4538781A JP S57161303 A JPS57161303 A JP S57161303A
Authority
JP
Japan
Prior art keywords
speed
maximum
value
maximum set
set speed
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
JP4538781A
Other languages
Japanese (ja)
Inventor
Hiroshi Watanabe
Eiki Izumi
Yukio Aoyanagi
Kazuo Honma
Yoshio Nakajima
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP4538781A priority Critical patent/JPS57161303A/en
Publication of JPS57161303A publication Critical patent/JPS57161303A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/003—Reciprocating-piston liquid engines controlling
    • F03C1/004—Reciprocating-piston liquid engines controlling speed-control

Abstract

PURPOSE:To always keep maximum acceleration of an actuator constant, by increasing a maximum set speed, limiting an operating speed of a displacement variable mechanism of a variable displacement oil hydraulic pump, correspondingly to a decrease of speed of a prime mover as a power supply source of said pump. CONSTITUTION:Since at maximum speed value of a prime mover 8, output ratio of a speed detector 9 is 1, a divider 1 outputs a value i.e. maximum set speed from a maximum set speed generator circuit 10 divided by 1, that is, a value of the maximum set speed as it is to an arithmetic unit 6. Accordingly, operating speed of a displacement variable mechanism 3 of a variable displacement oil hydraulic pump 1 is limited to not more then the maximum set speed. On the other hand, if the speed of the prime mover 8 is decreased to, for instance, 1/2 times the maximum value, the divider 11 divides the maximum set speed with 0.5 to double the maximum set speed. In consequence, a limited value of operating speed of said mechanism 3 increases inversely proportionally to speed, and maximum acceleration of an actuator 2 becomes the same value as the speed of the prime mover.
JP4538781A 1981-03-30 1981-03-30 Oil hydraulic circuit controller Pending JPS57161303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4538781A JPS57161303A (en) 1981-03-30 1981-03-30 Oil hydraulic circuit controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4538781A JPS57161303A (en) 1981-03-30 1981-03-30 Oil hydraulic circuit controller

Publications (1)

Publication Number Publication Date
JPS57161303A true JPS57161303A (en) 1982-10-04

Family

ID=12717852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4538781A Pending JPS57161303A (en) 1981-03-30 1981-03-30 Oil hydraulic circuit controller

Country Status (1)

Country Link
JP (1) JPS57161303A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6353345A (en) * 1986-08-19 1988-03-07 Honda Motor Co Ltd Speed change controlling method for continuously variable transmission for vehicle
US4809504A (en) * 1986-01-11 1989-03-07 Hitachi Construction Machinery Co., Ltd. Control system for controlling input power to variable displacement hydraulic pumps of a hydraulic system
WO1999063168A1 (en) * 1998-06-02 1999-12-09 O & K Mining Gmbh Method for regulating especially the pivoting device of a mobile machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809504A (en) * 1986-01-11 1989-03-07 Hitachi Construction Machinery Co., Ltd. Control system for controlling input power to variable displacement hydraulic pumps of a hydraulic system
JPS6353345A (en) * 1986-08-19 1988-03-07 Honda Motor Co Ltd Speed change controlling method for continuously variable transmission for vehicle
WO1999063168A1 (en) * 1998-06-02 1999-12-09 O & K Mining Gmbh Method for regulating especially the pivoting device of a mobile machine

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