Patent · US Expired

Method for operating and valve drive for a multicylinder internal combustion engine

US6332445A · kind A · utility

40Cited by

17References

13Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Hartmut Voss · Schriesheim, DE
Joachin Grunberger · Sachsenheim, DE

Key dates

Filing date	Jun 29, 1999
Grant date	Dec 25, 2001
Priority date	—
Expiry date	Jun 29, 2019

Classification

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

Abstract

An engine is operated with two groups of cylinders, one of which groups is constantly powered and a second of said groups is selectively operated by cutting it in and out. The second group of cylinders is cut in and out by switching the valve lift of the associated charge-changing valves. The valve lift of the constantly operated cylinder group is also independently variable so that in both operating states of the second cylinder group, consumption-optimized valve lifts can be set for the first cylinder group.

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