Fuel control method for hand-carried engine-driven working machine
US9115670B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 28, 2013 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Feb 21, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P5/1455
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The opening of a solenoid valve is automatically adjusted after an engine is started and before actual work is performed for an appropriate air-fuel ratio, whereby it is possible to attain a good and stable driving of the engine without any delay even for an abrupt change in load. After the engine is started, when a rotation speed enters a “fuel flow rate adjusting rotation speed range” in which a definite load is applied to the engine in a working rotation speed range of the engine in which a throttle valve is opened to a definite opening, a detected rotation speed is fed back to a target rotation speed, and the opening of the solenoid valve is controlled to adjust a fuel flow rate, so that the combustion state in the engine is optimized at the valve opening so determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.