Patent · US Expired

Combined stroke/pressure controlled fuel injection method and system for an internal combustion engine

US6491017B1 · kind B1 · utility

19Cited by

6References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Bernd Mahr · Plochingen, DE
Martin Kropp · Ditzingen, DE
Hans-Christoph Magel · Pfullingen, DE
Wolfgang Otterbach · Stuttgart, DE

Key dates

Filing date	Jul 27, 2001
Grant date	Dec 10, 2002
Priority date	—
Expiry date	Jul 27, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/21
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a method for injecting fuel at at least two differently high fuel pressures via injectors into the combustion chamber of an internal combustion engine, the fuel injection at the lower fuel pressure takes place under stroke control, and the fuel injection at the higher fuel pressure takes place under pressure control. For a pre- and/or post-injection and/or a boot injection at the lower fuel pressure, the control chamber and via a check valve the nozzle chamber as well are connected to a low-pressure fuel supply, and that for a main injection at the higher fuel pressure, the nozzle chamber is connected to the high-pressure fuel supply.

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