Flame glow plug for a diesel engine

US5664547A · kind A · utility

Assignees

• Mercedes-Benz Group AG · DE
• Beru Ruprecht GmbH & Co. KG · DE

Inventors

• Roland Klak · Esslingen am Neckar, DE
• Martin Eller · Ludwigsburg, DE
• Helmut Buck · Schriesheim, DE

Key dates

• Filing date: Feb 5, 1996
• Grant date: Sep 9, 1997
• Expiry date: Feb 5, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a flame glow plug for a Diesel engine with an insert structure mounted on the plug body for the supply of fuel thereto, wherein the plug body includes in a vaporizing tube, a heating rod arranged in spaced relationship to the vaporizing tube such that an annular gap remains in which a vaporizing sieve is disposed and the heating rod extends axially beyond the vaporizing tube and is protected there by a flame tube firmly mounted on the plug and projecting into the intake airflow path when the glow plug is installed in an engine, the flame tube has circumferentially spaced air inlet openings and the vaporizing tube extends to the air inlet openings of the flame tube, the vaporizing tube further has a collar forming a narrow annular gap around the heating rod for supporting the vaporizing sieve and preventing flame backflashing through the gap and at least one row of openings arranged circumferentially below the collar.