Emergency stop method for hybrid construction equipment and brake control device

• US 9,431,930 B2
• Filed: 12/27/2012
• Issued: 08/30/2016
• Est. Priority Date: 12/28/2011
• Status: Active Grant

• Current Assignee: HD Hyundai Infracore Co., Ltd.
• Original Assignee: Doosan Infracore Company Limited
• Inventors: Kim, Sang Il, Kim, Kyeong Keun, Kang, Byung Il
• Primary Examiner(s): Kan, Yuri
• Application Number:
  US14/369,562
• Publication Number:
  US 20150042259A1
• Time in Patent Office: 1,342 Days
• Field of Search: 318/703, 701/22, 701/50, 322/14, 477/95, 137/561.R, 198/346.1
• US Class Current: 1/1
• CPC Class Codes: B60T 1/062 acting on transmission parts
• CPC Class Codes: E02F 9/128 Braking systems
• CPC Class Codes: E02F 9/2095 Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans control of hydraulic driven equipment E02F9/22
• CPC Class Codes: E02F 9/226 Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
• CPC Class Codes: E02F 9/268 with failure correction follow-up actions
• CPC Class Codes: H02P 3/14 by regenerative braking

Abstract

The present disclosure relates to an emergency stop method for hybrid construction equipment and a brake control device, and more particularly, to an emergency stop method for hybrid construction equipment and a brake control device, which may confirm a failure occurrence location of the hybrid construction equipment, absorb inertial energy of the swing body using several functions for each generated failure location so as to stably stop the swing body in an emergency manner, and when the failure occurs in the hybrid construction equipment, create the brake pattern by using the swing speed or the front information, control a brake of the swing body by controlling a voltage control valve or a hydraulic valve in accordance with the created brake pattern, such that a user may smoothly stop the swing body in accordance with a desired stop speed profile.

Claims

1. A brake control device for hybrid construction equipment, comprising:

a brake configured to stop a swing body when failure occurs in the hybrid construction equipment;

a drive valve which is formed hydraulically or electrically, and configured to control pressure or an amount of fluid applied to the brake; and

a control unit configured to;

determine a brake pattern using front information or a swing speed of the swing body; and

control the drive valve while creating a voltage control signal or a hydraulic pressure control signal so that the swing body is stopped depending on the determined brake pattern.

2. The brake control device of claim 1, wherein the drive valve is a hydraulic valve, and wherein the control unit is further configured to:

create the brake pattern with a pulse width modulation using the front information or the swing speed of the swing body; and

control the drive valve in accordance with a hydraulic pressure control signal of the created pulse width modulation.

3. The brake control device of claim 1, wherein the drive valve is a voltage controlled valve, and wherein the control unit is further configured to:

create the brake pattern depending on a predetermined stop speed profile using the front information or the swing speed of the swing body; and

control the drive valve in accordance with the created voltage control signal.