Patent · US Active

Internal combustion engine

US8479509B2 · kind B2 · utility

2Cited by

3References

9Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Leo Spiegel · Sharon, US
Van-Khanh Tran · Rutesheim, DE
Hartmut Voss · Schriesheim, DE
Dietmar Schwarzenthal · Ditzingen, DE

Key dates

Filing date	Feb 17, 2010
Grant date	Jul 9, 2013
Priority date	—
Expiry date	Oct 19, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for operating an internal combustion engine with compression ignition or with spark ignition as a function of an operating point. A specific residual exhaust-gas quantity in the combustion space is set for compression ignition. The internal combustion engine is operated as a function of the operating point by an outlet cam, by which a first outlet opening phase and a second outlet opening phase take place. The second outlet opening phase commences during an inlet opening phase. At a first operating point in a compression-ignition mode, a residual exhaust-gas quantity in a combustion space is dimensioned as a function of a valve interference set between the inlet and the outlet valve during a charge exchange. At a second operating point in the compression-ignition mode the residual exhaust-gas quantity in the combustion space is dimensioned as a function of a duration of the second outlet opening phase.

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