Multipart insulating element, in particular for a fuel injection device

US10648438B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Kochanowski · Heubach, DE
• Thomas Froehner · Karlsruhe, DE
• Markus Friedrich · Moosburg an der Isar, DE
• Martin Scheffel · Leinfelden, DE
• Jason L. Kramer · South Lyon, US

Key dates

• Filing date: Mar 22, 2013
• Grant date: May 12, 2020
• Expiry date: Jul 29, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/9053
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An insulating element for a fuel injection apparatus is notable in particular for the fact that a low-noise design is achieved. The fuel injection apparatus encompasses at least one fuel injection valve and one receiving bore in a cylinder head for the fuel injection valve, and the insulating element between a valve housing of the fuel injection valve and a wall of the receiving bore. The insulating element possesses an inner insulating ring that is present in encapsulated fashion between an outer ring and an inner ring. The outer ring is directed toward the fuel injection valve and the inner ring is directed toward the wall of the receiving bore, so that corresponding abutment of these components occurs with the insulating element in the installed state. The fuel injection apparatus is suitable in particular for direct injection of fuel into a combustion chamber of a mixture-compressing spark-ignited internal combustion engine.