Hydraulic circuit for construction equipment
Номер патента: EP3844350A1
Опубликовано: 07-07-2021
Автор(ы): Bon Seuk KU
Принадлежит: VOLVO CONSTRUCTION EQUIPMENT AB
Опубликовано: 07-07-2021
Автор(ы): Bon Seuk KU
Принадлежит: VOLVO CONSTRUCTION EQUIPMENT AB
Реферат: Provided is a hydraulic circuit of construction equipment, including a boom cylinder for controlling ascending and descending movement of a boom, which includes a valve unit having a first control valve configured to control a large chamber of the boom cylinder to selectively communicate with a small chamber of the boom cylinder, a second control valve configured to control the large chamber to selectively communicate with an oil tank, a third control valve configured to control the large chamber to selectively communicate with an accumulator, and a fourth control valve configured to control a part of hydraulic oil flowing to the accumulator to selectively flow to an assist motor.
Combined closed-loop hydraulic circuit and hydraulic energy storage system
Номер патента: GB2493706A. Автор: Andrew John Smith,Robert Nicholas Harper. Владелец: Caterpillar Inc. Дата публикации: 2013-02-20.