Patent · US Expired

Method for operating a two-stroke engine having mixture induction

US6912979B2 · kind B2 · utility

4Cited by

4References

12Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Claus Fleig · Asperg, DE
Werner Geyer · Newton, US
Jorg Schlossarczyk · Winnenden, DE

Key dates

Filing date	Sep 8, 2003
Grant date	Jul 5, 2005
Priority date	—
Expiry date	Sep 8, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02B63/02
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a method for operating a two-stroke engine having scavenging-advance storage. The combustion chamber (3) which in configured in the cylinder (2) is supplied with an air/fuel mixture via a transfer channel (12, 15). This air/fuel mixture is drawn by induction through an inlet into the crankcase (4) during the intake phase. During the intake phase, a fuel-free fluid such as pure air is inducted via a fluid channel (17) and stored in the transfer channel. To obtain good exhaust-gas values while also having reduced fuel consumption and reliable lubrication, lambda (λ) of the air/fuel mixture, which is stored in the crankcase (4), is adjusted in a range of approximately 0.2 to 0.6 in the part-load and full-load ranges of the two-stroke engine (1).

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