Patent · US Active

Injection device

US9206779B2 · kind B2 · utility

1Cited by

2References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Nestor Rodriguez-Amaya · Stuttgart, DE
Jochen Doehring · Kornwestheim, DE
Juergen Hanneke · Stuttgart, DE
Godehard Nentwig · Stuttgart, DE

Key dates

Filing date	Jul 18, 2011
Grant date	Dec 8, 2015
Priority date	—
Expiry date	Dec 4, 2031

Classification

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

Abstract

The invention relates to an injection device, in particular for injecting fluid into an exhaust tract of an internal combustion engine, having a valve unit which comprises a valve needle, an injection chamber having at least one injection opening, and a control chamber, wherein the injection device is designed so that a pressure differential between the injection chamber and the control chamber brings about a displacement of the valve needle between an open position in which the valve needle releases a fluid flow through the injection opening, and a closed position in which the valve needle closes off the injection opening. The injection device also has a pump unit integrated in the injection device. The pump unit is designed so as to draw in fluid from the fluid inlet during operation and to provide said fluid to the valve unit under increased pressure.

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