Hydraulic fluid energy regeneration apparatus of work machine
US10584722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2015 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | May 7, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/761
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic fluid energy regeneration apparatus of a work machine includes: a regeneration hydraulic motor driven by a return hydraulic fluid; a first hydraulic pump mechanically connected to the regeneration hydraulic motor; a second hydraulic pump that delivers a hydraulic fluid for driving a hydraulic actuator; a confluence line that causes the hydraulic fluid delivered from the first hydraulic pump to join the hydraulic fluid delivered from the second hydraulic pump; a first adjuster configured to adjust the flow rate of the hydraulic fluid of the first hydraulic pump; and a second adjuster configured to adjust the delivery flow rate of the second hydraulic pump. A control device includes: a first calculation section configured to calculate a non-confluence time pump flow rate in the case where the hydraulic actuator is driven solely by the second hydraulic pump and calculate a control command output to the first adjuster such that the flow rate of the hydraulic fluid from the first hydraulic pump is equal to or lower than the non-confluence time pump flow rate; and a second calculation section configured to calculate a target pump flow rate by subtracting from the non-confluen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.