Patent · US Expired

Arrangement for injecting fuel for a two-stroke engine

US4813391A · kind A · utility

18Cited by

6References

11Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Werner Geyer · Newton, US
Roland Schierling · Marbach am Neckar, DE
Hans Nickel · Cottenweiler, DE

Key dates

Filing date	Aug 15, 1999
Grant date	Mar 21, 1989
Priority date	—
Expiry date	Aug 15, 2019

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02B2075/025
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a fuel injection arrangement wherein the pump piston of the fuel pump is driven by the pressure in the crankcase of the engine. The fuel injection arrangement includes an opening for tapping the crankcase pressure for actuating a diaphragm in the fuel pump. This opening is controlled by a moving part of the engine such as a crank web or the piston. The moving part closes the opening at least for a portion of the time during which injection occurs thereby delaying the onset of injection to permit a complete combustion during the previous combustion cycle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.