Handheld engine-driven working machine
US9945290B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 20, 2016 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | May 28, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2400/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine-driven working machine includes a controller, which varies a control value of a solenoid valve so as to decrease or increase an opening degree of the solenoid valve when a rotating speed of an engine is within a predetermined high rotating speed range and the rotating speed of the engine is lower or higher than a predetermined rotating speed, respectively. In case the controller determines that the engine-driven working machine gets started saw cutting, the controller stops varying the control value of the solenoid valve when the rotating speed of the engine is within the predetermined high rotating speed range and lower than the target rotating speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.