Engine-assist device and industrial machine
US9593467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2014 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Jan 17, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7142
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An inexpensive engine assist device capable of performing stable energy regeneration from an accumulator and a working machine on which the engine assist device is mounted are provided. A variable capacity type main pump and a variable capacity type assist pump are directly connected to an engine. A return pressure oil flowing out from a fluid pressure actuator is temporarily accumulated by a sub-accumulator and is supplied to an inlet of the assist pump, and the assist pump pressurizes the return fluid pressure oil and supplies the return fluid pressure oil to a main accumulator. A controller calculates and controls an assist pump swash plate angle, and assist starting torque or charge starting torque, and introduces a pressure-accumulated fluid discharged from the main accumulator to the inlet of the assist pump or introduces a pressurized fluid discharged from an outlet of the assist pump into the main accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.