Handheld engine-driven working machine
US10415496B2 · kind B2 · utility
2Cited by
1References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 20, 2016 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Aug 30, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M7/22
- 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. When the control value of the solenoid valve is varied so as to decrease the opening degree of the solenoid valve and corresponds to a predetermined opening degree larger than a fully-closed state, the control value is set to a limitation value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.