Patent · US Expired

Injection device comprising an actuator for controlling the needle stroke

US6575139B2 · kind B2 · utility

6Cited by

9References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Nestor Rodriguez-Amaya · Stuttgart, DE
Roger Potschin · Brackenheim, DE
Ulrich Projahn · Graus, ES

Key dates

Filing date	Mar 18, 2002
Grant date	Jun 10, 2003
Priority date	—
Expiry date	Apr 13, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M63/0061
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to an arrangement for injecting fuel, which is at high pressure, into an internal combustion engine. An injector (25) encloses a pressure chamber (1), from which a high-pressure line (3) discharges into a control chamber (4) of a nozzle needle (5). Also contained in the injector (25) are two control valves (11, 12), which on the outlet side communicate with regions (9) of a lesser pressure level. One of the control valves (11, 12) that form the injection course (20) contains a pressure compensation system (34), by which the injection pressure course (20) can be varied by varying the stroke length (23) of the nozzle needle (5).

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