Device for injecting fuel into a combustion chamber of an internal combustion engine

US4821696A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Bernhard Kaczynski · Waiblingen, DE
• Alfred Schmitt · Ditzingen, DE
• Ewald Eblen · Stuttgart, DE
• Iwan Komaroff · Regensburg, DE

Key dates

• Filing date: Jan 7, 1988
• Grant date: Apr 18, 1989
• Expiry date: Jan 7, 2008

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23Q7/001
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for injecting fuel into a combustion chamber of an internal combustion engine, having a glow coil (22, 92) disposed on the outlet side of the injection nozzle and increasing in size conically toward the combustion chamber; the coil is surrounded by a sleeve (30, 96) which firmly holds the end turn (88, 93) of the glow coil (22, 92) toward the combustion chamber and has a contact ring washer (46, 98), on which the other end turn (86, 94) of the glow coil (22, 92) is secured. The end turn (88, 93) toward the combustion chamber rests on an annular shoulder (90, 107), oriented according to the invention toward the combustion chamber, of the sleeve (30, 96), which surrounds an insertion opening (91, 106) the inside diameter of which is smaller than the outside diameter of the end turn (88, 93) toward the combustion chamber, but greater than the outside diameters of all the other turns of the glow element (22, 92). As a result, the glow coil (22, 92 ) can still be inserted and electrically contacted once the contact ring washer (46, 98) has already been fastened to the sleeve (30, 96) and with it forms a pre-fabricated structural unit.