Patent · US Expired

Internal combustion engine and method, computer program and control apparatus for operating the internal combustion engine

US6973919B2 · kind B2 · utility

5Cited by

3References

24Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Klaus Joos · Walheim, DE
Jens Wolber · Gerlingen, DE
Thomas Frenz · Nördlingen, DE
Markus Amler · Rutesheim, DE

Key dates

Filing date	Sep 30, 2002
Grant date	Dec 13, 2005
Priority date	—
Expiry date	Feb 27, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/2065
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In an internal combustion engine, the fuel reaches the combustion chamber of the engine via a fuel-injection device which includes a piezo actuator (50). In order to be able to optimally inject the fuel, it is suggested that the desired level (U_DES) of the drive energy (U) and/or the desired gradient (dU_DES) of the drive energy (U), with which the piezo actuator (50) is driven, is dependent upon a plurality of influence quantities (T, t, n, dx, dh) which influence the operating behavior of the piezo actuator (50).

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