Method for controlling cooling fan-brake of construction equipment

Patent metadata

Field	Value
Publication number	US-9580887-B2
Application number	US-201214368969-A
Country	US
Kind code	B2
Filing date	Dec 26, 2012
Priority date	Dec 28, 2011
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The present disclosure provides a method for controlling a cooling fan-brake of construction equipment, including: generating a brake charging signal of a brake unit; charging hydraulic oil with a high flow rate in the brake unit and completing the charging of hydraulic oil; turning a loading valve of a cooling fan unit off and turning an unloading valve of the cooling fan unit on when the hydraulic oil is charged; and turning the loading valve of the cooling fan unit on and turning the unloading valve of the cooling fan unit off after the charging of hydraulic oil is completed and a predetermined time elapses.

First claim

The invention claimed is:

1. A method for controlling a cooling fan-brake of construction equipment, comprising:
generating a brake charging signal of a brake unit in a normally controlled state;
wherein the normally controlled state includes a loading valve of a cooling fan unit in an on state and an unloading valve of the cooling fan unit in an off state;
making, by a controller, when a brake priority valve and a brake charging valve of the brake unit operate so that a hydraulic oil with a high flow rate is charged in the brake unit, the loading valve of the cooling fan unit to turn off and the unloading valve of the cooling fan unit to turn on when charging of the hydraulic oil; and
turning the loading valve of the cooling fan unit on and turning the unloading valve of the cooling fan unit off after the charging of hydraulic oil is completed and a predetermined time elapses.

2. The method of claim 1 , wherein the brake charging valve of the brake unit is turned off when the hydraulic oil is completely charged.

3. The method of claim 1 , wherein the predetermined time after the charging completion of the hydraulic oil is 0.5 second.

4. The method of claim 1 , wherein the controller detects a pressure of the brake charging valve and determines whether the hydraulic oil is in a charged state based on the pressure.

5. The method of claim 4 , wherein when the pressure of the brake charging valve detected is equal to or lower than 120 bar, the controller makes the hydraulic oil to be first charged in the brake charging valve.

6. The method of claim 4 , wherein the controller makes the brake charging valve to continue to charge until the pressure of the hydraulic oil is equal to or greater than about 140 bar.

Assignees

• Doosan Infracore Co Ltd

Inventors

• Jang In Pyo

Classifications

• B60T5/00 Primary

  Vehicle modifications to facilitate cooling of brakes · CPC title

• F16D2065/782

  the brake-actuating fluid being used as a coolant · CPC title

• E02F9/2221 Primary

  Control of flow rate; Load sensing arrangements (E02F9/2203 take precedence over E02F9/2221) · CPC title

• F16D2065/784

  the coolant not being in direct contact with the braking surface · CPC title

• E02F9/2217

  with energy recovery arrangements, e.g. using accumulators, flywheels · CPC title