Fuel-injection device

US7931007B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Michael Fischer · Mühlacker, DE
• Ulrich Fischer · Ditzingen, DE
• Peter Lang · Gelnhausen, DE

Key dates

• Filing date: Dec 7, 2007
• Grant date: Apr 26, 2011
• Expiry date: Jun 21, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/853
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The fuel-injection device is characterized by an especially low-noise design. The fuel-injection device includes at least one fuel injector and a fuel rail having at least one pipe connection, the fuel injector being introduced into a receiving bore of the pipe connection, and the fuel rail having a discharge opening to supply fuel to the fuel injector. Provided between the fuel injector and the fuel rail is a pressure-wave guide connecting both, in such a way such that dynamic pressure fluctuations in the fuel injector are able to be routed largely past the volume of the receiving bore of the pipe connection. The fuel-injection device is especially suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing internal combustion engine having external ignition, but it is also suitable for the injection of fuel into an intake manifold.