Method for controlling flow rate of attachment for construction equipment

• US 9,347,467 B2
• Filed: 12/22/2011
• Issued: 05/24/2016
• Est. Priority Date: 12/23/2010
• Status: Active Grant

• Current Assignee: HD Hyundai Infracore Co., Ltd.
• Original Assignee: Doosan Infracore Company Limited
• Inventors: Song, Seong Ho
• Primary Examiner(s): Leslie, Michael
• Application Number:
  US13/991,579
• Publication Number:
  US 20130255241A1
• Time in Patent Office: 1,615 Days
• Field of Search: 604/31
• US Class Current: 1/1
• CPC Class Codes: E02F 3/963 Arrangements on backhoes for alternate use of different tools backhoes per se E02F3/30; quick-acting devices to connect tools to arms E02F3/3609, for arms to tractors or the like E02F3/627
• CPC Class Codes: E02F 9/2235 including an electronic controller
• CPC Class Codes: E02F 9/2246 Control of prime movers, e.g. depending on the hydraulic load of work tools
• CPC Class Codes: E02F 9/2296 Systems with a variable displacement pump
• CPC Class Codes: F02D 29/04 peculiar to engines driving pumps
• CPC Class Codes: F15B 11/0423 by controlling pump output or bypass, other than to maintain constant speed
• CPC Class Codes: F15B 15/18 Combined units comprising both motor and pump
• CPC Class Codes: F15B 2211/20523 Internal combustion engine
• CPC Class Codes: F15B 2211/20546 variable capacity
• CPC Class Codes: F15B 2211/255 Flow control functions
• CPC Class Codes: F15B 2211/6651 Control of the prime mover, e.g. control of the output torque or rotational speed
• CPC Class Codes: F15B 2211/6652 Control of the pressure source, e.g. control of the swash plate angle
• CPC Class Codes: F15B 2211/6654 Flow rate control
• CPC Class Codes: F15B 2211/705 characterised by the type of output members or actuators

Abstract

A method of controlling a flow rate of an attachment for construction equipment of the present disclosure, in which an engine and a pump are connected to a control device to which various control information according to equipment characteristics, user setting information from an instrument panel, engine rpm adjustment information through an engine control dial, or the like is inputted, and an attachment is connected to the pump so as to perform specific work, includes selecting, on the instrument panel, an attachment to perform work and an optimum engine rpm according to the attachment; adjusting the flow rate by controlling an angle of a swash plate of the pump; and adjusting additionally a supply flow rate of the attachment by resetting an engine rpm when adjustment to the flow rate is necessary while performing the attachment work.

Claims

1. A method, comprising:

receiving, by a control device of construction equipment in which an engine and a pump are connected to the control device, control information according to equipment characteristics, user setting information from an instrument panel, or engine rpm adjustment information through an engine control dial; and

controlling, by the control device, a flow rate of an attachment coupled to the construction equipment, which performs specific work using working oil supplied from the pump, the controlling of the flow rate comprising;

selecting an optimum engine rpm corresponding to the attachment connected to the construction equipment;

selecting a flow rate range to be used in the attachment; and

resetting the flow rate range of the attachment by resetting the engine rpm when a maximum flow rate in the selected flow rate range is higher than a maximum pump flow rate dischargeable by the pump at a preset engine rpm.

2. The method of claim 1, wherein the selecting of the optimum engine rpm selects from a list in which preset engine rpms are listed for each attachment connectable to the construction equipment.

3. The method of claim 1, wherein in the selecting of the flow rate range to be used in the attachment, the instrument panel provides information on a flow rate range of the attachment, which is selected by a user, a maximum flow rate range dischargeable at a present engine rpm, and a maximum flow rate usable by the attachment.

4. A method, comprising:

receiving, by a control device of construction equipment in which an engine and a pump are connected to the control device, control information according to equipment characteristics, user setting information from an instrument panel, or engine rpm adjustment information through an engine control dial; and

controlling, by the control device, a flow rate of an attachment coupled to the construction equipment, which performs specific work using working oil supplied from the pump, the controlling of the flow rate comprising;

selecting an optimum engine rpm corresponding to the attachment connected to the construction equipment;

selecting a maximum flow rate to be used in the attachment;

comparing the selected maximum flow rate with a maximum pump flow rate dischargeable by the pump at a preset engine rpm; and

resetting the flow rate of the attachment by resetting the engine rpm when the selected maximum flow rate is higher than the maximum pump flow rate in the comparing.

5. The method of claim 4, wherein in the selecting of the maximum flow rate to be used in the attachment, the instrument panel provides information on a maximum flow rate of the attachment, which is selected by a user, a maximum flow rate dischargeable at a present engine rpm, and a maximum flow rate usable by the attachment.