Patent · US Active

Method for operating an internal combustion engine

US8322326B2 · kind B2 · utility

2Cited by

6References

14Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Tim Gegg · Waiblingen, DE
Manuel Dangelmaier · Plochingen, DE
Andreas Neubauer · Ludwigsburg, DE
Wolfgang Layher · Besigheim, DE

Key dates

Filing date	Jan 5, 2009
Grant date	Dec 4, 2012
Priority date	—
Expiry date	Sep 20, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D41/3058
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An internal combustion engine (8) has an ignition device, a device for supplying fuel and a device for detecting the rpm of the engine (8). The engine (8) includes a permissible limit rpm (ng) and a control range (A) of the rpm (n) above the limit rpm (ng). A method for operating the engine (8) provides that the rpm of the engine (8) is limited in the control range (A) because of suppression of the ignition in individual engine cycles wherein the rpm (n) lies above a control rpm (na) lying in the control range (A). In the control range, and to improve the exhaust-gas values, the noncombustion engine cycle ratio (NECR) is adjusted. The NECR indicates the ratio of the number of engine cycles wherein the ignition is suppressed to the total number of ignitions.

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