Operation control device

• US 5,029,067 A
• Filed: 11/22/1988
• Issued: 07/02/1991
• Est. Priority Date: 01/30/1987
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Komatsu Seisakusho
• Original Assignee: Kabushiki Kaisha Komatsu Seisakusho
• Inventors: Kobayashi, Takeshi, Yokoyama, Toshio, Moriya, Yukio, Nishida, Kimio
• Primary Examiner(s): Smith, Jerry
• Assistant Examiner(s): Trammell, Jim
• Application Number:
  US07/269,834
• Time in Patent Office: 952 Days
• Field of Search: 364/137, 364/138, 364/141, 364/142, 364/143, 364/146, 364/167.01, 364/172, 364/173, 364/175, 364/176, 364/180, 364/190, 364/478, 364/513, 60/421, 60/433, 60/327
• US Class Current: 700/68
• CPC Class Codes: E02F 9/2004 Control mechanisms, e.g. control levers control levers per se G05G
• CPC Class Codes: E02F 9/2235 including an electronic controller
• CPC Class Codes: E02F 9/2242 including an electronic controller
• CPC Class Codes: E02F 9/2292 Systems with two or more pumps
• CPC Class Codes: E02F 9/2296 Systems with a variable displacement pump
• CPC Class Codes: F15B 11/165 for adjusting the pump output or bypass in response to demand
• CPC Class Codes: F15B 11/17 using two or more pumps
• CPC Class Codes: F15B 21/087 Control strategy, e.g. with block diagram
• CPC Class Codes: F15B 2211/20553 with pilot circuit, e.g. for controlling a swash plate
• CPC Class Codes: F15B 2211/20576 with multiple pumps
• CPC Class Codes: F15B 2211/30505 Non-return valves, i.e. check valves
• CPC Class Codes: F15B 2211/327 electrically or electronically
• CPC Class Codes: F15B 2211/40507 with constant throttles or orifices
• CPC Class Codes: F15B 2211/41572 being connected to a pressure source and an output member
• CPC Class Codes: F15B 2211/426 electrically or electronically
• CPC Class Codes: F15B 2211/428 actuated by fluid pressure
• CPC Class Codes: F15B 2211/45 Control of bleed-off flow, e.g. control of bypass flow to the return line
• CPC Class Codes: F15B 2211/50563 the pressure control means controlling a differential pressure
• CPC Class Codes: F15B 2211/5159 being connected to an output member and a return line
• CPC Class Codes: F15B 2211/528 actuated by fluid pressure
• CPC Class Codes: F15B 2211/6323 : the flow rate being a pressure source flow rate
• CPC Class Codes: F15B 2211/6326 : the flow rate being an output member flow rate
• CPC Class Codes: F15B 2211/633 : representing a state of the prime mover, e.g. torque or rotational speed
• CPC Class Codes: F15B 2211/6333 : representing a state of the pressure source, e.g. swash plate angle
• CPC Class Codes: F15B 2211/6346 : representing a state of input means, e.g. joystick position
• CPC Class Codes: F15B 2211/6652 : Control of the pressure source, e.g. control of the swash plate angle
• CPC Class Codes: F15B 2211/7135 : Combinations of output members of different types, e.g. single-acting cylinders with rotary motors
• CPC Class Codes: G05B 19/40 : Open loop systems, e.g. using stepping motor
• CPC Class Codes: G05B 2219/35438 : Joystick
• CPC Class Codes: G05B 2219/41309 : Hydraulic or pneumatic drive
• CPC Class Codes: G05B 2219/45012 : Excavator

Abstract

An operation control device is disclosed. According to a drive command value generated depending on the manipulated amount of a plurality of operating means (11, 12, 13, 14, 15, 16), the operation control device controls the drive amount of actuators (BMS, AMS, BKS, LDM, RDM, TNM) associated with the operated actuator. In the drive amount control, the operation control device changes a ratio of the manipulated amount and the drive amount command value by work accuracy flow rate data (41), weights the drive command values based on the same manipulated values of said operating means by priority mode weight data (42), and/or controls the timing of supply of the drive energy from at least two separate energy sources (FFP, RP) as a drive energy source for the respective actuators, and the supply amount of the drive energy, under control of pump utilization data (43) and pump swash plate control data (44). Every time the operating means are operated, these pieces of the control data are properly determined through proper operations (including the look-up table processing) according to the operations of the operating means, the selections of the work accuracy mode select switch (21) and the priority mode select switch (22).

Claims

1. An operation control device comprising:

a plurality of actuators;

a plurality of operating means for outputting respective drive command values for each of said plurality of actuators;

a plurality of pressure oil supply means for supplying pressurized oil to each actuator at flow rates each corresponding to each of the drive command values outputted from said plurality of operating means;

at least two pressure oil sources for transferring to each pressure oil supply means via at least two paths the pressurized oil which is supplied to each actuator;

control means for controlling each pressure oil supply means so that the pressurized oil transferred from each of said pressure oil sources are respectively distributed to each actuator with respective flow rates according to priority orders of each of the actuators predetermined respectively for each of said at least two pressure oil sources;

operation mode selecting means for selecting an operation mode from among a plurality of operation modes indicative of respective ratios; and

means for setting a ratio of a drive command value for a manipulated amount of said operating means into a ratio selected by said operation mode selecting means.

2. An operation control device comprising:

a plurality of actuators;

a plurality of operating means for outputting respective drive command values for each of said plurality of actuators;

a plurality of pressure oil supply means for supplying pressurized oil to each actuator at flow rates each corresponding to each of the drive command values outputted from said plurality of operating means;

at least two pressure oil sources for transferring to each pressure oil supply means via at least two paths the pressurized oil which is supplied to each actuator;

control means for controlling each pressure oil supply means so that the pressurized oil transferred from each of said pressure oil sources are respectively distributed to each actuator with respective flow rates according to priority orders of each of the actuators predetermined respectively for each of said at least two pressure oil sources;

priority mode selecting means for selecting a weighting factor of each actuator set with respect to one priority mode from among weighting factors of respective actuators set for a plurality of priority modes; and

means for respectively multiplying the weighting factor of each actuator selected by said priority mode selecting means by the drive command value of each actuator output from said operating means, and changing the drive command value of each actuator.