Fuel injection pump for a two-stroke engine in a work apparatus such as a motor-driven chain saw
US5197417A · kind A · utility
13Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1992 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Aug 3, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a fuel injection pump for a two-stroke engine mounted in a work apparatus such as a motor-driven chain saw. The injection pump includes a pneumatic drive chamber which is charged with the crankcase pressure of the two-stroke engine. A membrane mounted in the drive chamber transmits the pulses of the crankcase pressure to a pump piston which moves into a pump chamber against the force of a leaf spring. The leaf spring is configured as a leaf spring packet of individual leaf springs in order to obtain an adaptation of the injected fuel quantity to the position of the throttle flap of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.