| 摘要 |
<p>A method for controlling a closed type hydraulic system is disclosed. The closed type hydraulic system comprises multiple closed type hydraulic pressure subsystems (100) driven by a common driving source, wherein each closed type hydraulic pressure subsystem comprises a variable displacement pump (1), an actuator (2) and an oil-feeding loop (3). The control method comprises: judging whether each closed type hydraulic pressure subsystem (100) is in a working state or not, and unloading the oil-feeding loop of each closed type hydraulic pressure subsystem (100) in a non-working state. A closed type hydraulic system is also disclosed, which also comprises a controller, and the oil-feeding loop (3) of each closed type hydraulic pressure subsystem (100) is connected with an unloading oil way; the controller is used for judging whether each closed type hydraulic pressure subsystem (100) is in a working state or not, and the unloading oil way of the oil-feeding loop (3) of each closed type subsystem (100) in a non-working state is conducted. The oil-feeding loop of each closed type subsystem in a non-working state is unloaded, thereby greatly reducing unnecessary power loss of the whole closed type hydraulic system and reducing the thermal value.</p> |
