Fuel injection nozzle for internal combustion engines

US5161742A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Karl Hofmann · Neckarrems, DE
• Roland Zucker · Bietigheim-Bissingen, DE
• Bernhard Kaczynski · Waiblingen, DE
• Ursula Schoedel · Bietigheim-Bissingen, DE
• Alfred Knauer · Stuttgart, DE
• Ulrich Lessing · Stuttgart, DE

Key dates

• Filing date: May 6, 1991
• Grant date: Nov 10, 1992
• Expiry date: May 6, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B3/06
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An injection nozzle provided with an inductive needle movement sensor is constructed in such a way that a coil winding of the sensor is faultlessly sealed against overflow oil without more space being required for the needle movement sensor than is required in a construction without a sealing of the coil winding against overflow oil. For this purpose, a coil core of the induction coil is lengthened into a lengthened portion of the chamber in a short-circuit body of the sensor, which chamber receives an induction coil, and a sealing ring seals the coil winding against a guide gap of the magneto armature in the short-circuit body. An annular gap between the short-circuit body and a bore hole wall in a nozzle holder receiving is sealed by means of a sealing ring. A clamping flange connected with the coil core directly contacts an adjacent annular flange of the coil body and the coil winding contacts connection wires on the other side of a clamping flange.