Doosan Infracore Co., Ltd.

Kyeong Keun Kim

Sang Il Kim

Chang Hyun Kim

Lee Hyoung Cho

Byung Il Kang

Dong Mok Kim

Nag In Kim

Choon Tack Kim

Eun Soo Jung

Hyun Jae Seo

The present disclosure relates to a wheel driving device and a wheel driving method for a hybrid construction machine, in which in a construction machine having wheels, particularly, a hybrid wheel loader, by small-capacity low-speed electric motors, small-capacity high-speed electric motors, transmissions each having a clutch, and a control unit which are installed for all of the wheels each, the wheel driving device drives the low-speed electric motor during low-speed driving and drives the high-speed electric motor during high-speed driving by turning on and off the clutch during the low-speed driving and the high-speed driving, thereby reducing manufacturing costs of the wheel driving device, improving fuel economy of the construction machine, reducing abrasion of tires mounted on the wheels, improving durability of the tires, and ensuring traveling stability.

Wheel driving device and wheel driving method for hybrid construction machine

The present disclosure relates to a power supply device for hybrid construction machinery, and more particularly, to a power supply device for hybrid construction machinery, which is capable of reducing engine loads and facilitating improvement of engine efficiency by excluding a starting motor used in general hybrid construction machinery and an alternator for charging a battery from hybrid construction machinery, such as a hybrid excavator or vehicle, which commonly uses an engine and an electric motor as a power source and includes an electric energy storage device, and a method for the same.

Power supply device for hybrid construction machinery, and method therefor

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.

Emergency stop method for hybrid construction equipment and brake control device

The present disclosure relates to an apparatus for controlling a swing brake for construction machinery, comprising: a lower travel body; an upper swinging body supported at the lower travel body such that the upper swing body is capable of being swung; a swing motor for driving the upper swing body; a swing brake for braking the swing motor; a swing brake valve which operates to control the braking and releasing operations of the swing brake; a solenoid valve mounted on the swing brake valve to control the operation of the swing brake valve; an operation sensor which applies a first reference signal and a second reference signal in accordance with the motion of a swing operation control unit for controlling the operation of the upper swinging body, wherein said second reference signal is generated when an amount of displacement of the swing operation control unit is larger than the first reference signal; and a control unit, which operates the swing brake valve to release the swing brake when the first reference signal is inputted from the operation sensor, and which operates the swing motor when the second reference signal is inputted.

Swing brake control apparatus for construction machinery

A turning control apparatus for a hybrid construction machine may include an engine, an oil hydraulic pump, an electric energy storage device, an engine assistant motor, a turning motor, a power converter, a battery, an HCU, an SMPS configured to apply electric power to the HCU by being supplied with electric power from the battery, a Keyconfigured to switch a VKey_On path which supplies electric power from the battery to the SMPS when a key on signal of a driver is inputted, and a Keyconfigured to switch a VKey_Out path which allows electric power to be supplied from the battery to the SMPS when an operation of the Keyis stopped, in which the Keyis switched when it is confirmed that the turning motor is being driven in a state in which an operation of the Keyis stopped.

Growing community of inventors

Gyeonggi-do, South Korea

Kyeong Keun Kim