Hybrid construction machine
US8959918B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2011 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hybrid construction machine has an electric motor for driving the swing structure, and the electric motor is prevented from becoming incapable of generating torque due to a low energy state or an overcharged state of an electricity storage device. A swing-mode selector switch 77 which is manually operated switches between a hydraulic/electric combined swing mode for driving the swing structure by driving both the electric motor and a hydraulic motor and a hydraulic solo swing mode for driving the swing structure by driving only the hydraulic motor. For a normal operation, the swing mode is initially set in the hydraulic/electric combined swing mode. For a specific operation, the operator switches the swing-mode selector switch from a hydraulic/electric combined swing position to a hydraulic solo swing position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.