Patent · US Expired

Method for cylinder cut-in in an internal combustion engine process

US5727527A · kind A · utility

9Cited by

4References

7Claims

0Family size

Assignee

Ing. h.c. F. Porsche Aktiengesellschaft · DE

Inventors

Stephan Mueller · Leonberg, DE
Dietmar Schwarzenthal · Ditzingen, DE

Key dates

Filing date	Apr 19, 1996
Grant date	Mar 17, 1998
Priority date	—
Expiry date	Apr 19, 2016

Classification

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

Abstract

A method for cylinder cut-in in an internal combustion engine, with the engine having on a portion of its cylinders. The charge changing valves can be cut out as well as a switchable fuel supply, both of which can be switched from a cut-out or cut-off state to a cut-in state and vice versa. In order to provide a method for cylinder cut-in that permits a safe transition from operation in which they are cut out to one in which they are not cut out, and by which the effects of this switch are exhaust behavior are minimized, the charge changing valves are cut in first and then, after checking to determine whether the charge changing valves have been switched, the fuel supply is cut in to the cylinders that were previously cut out.

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