JP2017180033A5

JP2017180033A5 -

Info

Publication number: JP2017180033A5
Application number: JP2016072867A
Authority: JP
Filing date: 2016-03-31
Publication date: 2018-02-08
Anticipated expiration: 2036-03-31

Description

前記制御部は、前記目標回転数毎に前記低下量を判定するための前記判定値を有している。
前記制御部は、前記目標回転数が大きくなるにしたがって傾きが小さく設定された第１制御特性を用いて前記作動弁の制御を行う。 The control unit has the determination value for determining the amount of decrease for each target rotational speed.
The control unit controls the operation valve using a first control characteristic in which the inclination is set to be small as the target rotational speed is increased .

Claims

Prime mover,
A setting member for setting a target rotational speed of the prime mover;
A hydraulic pump operable by driving the prime mover and discharging hydraulic oil;
An operating valve to which hydraulic oil discharged from the hydraulic pump is supplied;
Hydraulic equipment operable by hydraulic fluid of the operating valve;
A plurality of first control characteristics determined in correspondence with the target rotational speed, each of which is a characteristic indicating a relationship between a hydraulic oil pressure of the working valve and an actual rotational speed of the prime mover when a load of the prime mover is equal to or greater than a predetermined value; A storage unit that stores a second control characteristic indicating a relationship between the pressure of the hydraulic oil of the operating valve and the actual rotational speed of the prime mover when the load of the prime mover is less than a predetermined value;
When the decrease amount of the actual rotation number from the target rotation number is less than a predetermined determination value, the operation valve is controlled based on the second control characteristic, and the decrease amount is the actual rotation number. A control unit that controls the operating valve based on the first control characteristic determined according to the target rotational speed when the determination value is equal to or greater than
The working machine's hydraulic system.

2. The hydraulic system for a working machine according to claim 1, wherein the control unit has the determination value for determining the amount of decrease for each target rotational speed.

3. The hydraulic system for a working machine according to claim 2, wherein the control unit controls the operation valve using the determination value that is set to a larger value as the target rotational speed increases.

Prime mover,
A setting member for setting a target rotational speed of the prime mover;
A hydraulic pump operable by driving the prime mover and discharging hydraulic oil;
An operating valve to which hydraulic oil discharged from the hydraulic pump is supplied;
Hydraulic equipment operable by hydraulic fluid of the operating valve;
A plurality of first control characteristics, which indicate a relationship between the pressure of the hydraulic oil of the working valve and the actual rotational speed of the prime mover, and are determined corresponding to the target rotational speed, and the pressure of the hydraulic oil of the working valve And a storage unit for storing a second control characteristic indicating a relationship between the actual rotational speed of the prime mover,
When the decrease amount of the actual rotation number from the target rotation number is less than a predetermined determination value, the operation valve is controlled based on the second control characteristic, and the decrease amount is the actual rotation number. A control unit that controls the operating valve based on the first control characteristic determined according to the target rotational speed when the determination value is equal to or greater than
The working machine's hydraulic system.