Patent · US Active

Method of operating an internal combustion engine

US7438045B2 · kind B2 · utility

2Cited by

3References

12Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Rudiger Herweg · Eßlingen, DE
Matthias Pfau · Meiningen, DE
Jochen Schäflein · Stuttgart, DE
Mayk Stelter · Stuttgart, DE

Key dates

Filing date	Jan 9, 2007
Grant date	Oct 21, 2008
Priority date	—
Expiry date	Jan 9, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a method of operating an internal combustion engine with a switch-over capability between a compression ignition mode of operation and a spark ignition mode of operation in higher load ranges which includes a cam-operated valve drive with a valve control providing, in the compression ignition mode of operation, for an increased valve overlap of the valve opening times, smooth engine operation and optimal exhaust gas emissions are obtained also during rapid load changes upon changing the engine operating mode as the change-over is accompanied by changes of the injection parameters, the throttling parameter and the valve control, which are coordinated with respect to one another as the valve control is switched over by changing the amplitude and phase position of the valve stroke of at least one of the inlet and outlet valves.

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