Spark plug for a high frequency ignition system

US10971902B2 · kind B2 · utility

Assignee

• Rosenberger Hochfrequenztechnik GmbH & Co. KG · DE

Inventors

• Martin Fuchs · Uxbridge, US
• Michael Wollitzer · Tittmoning, DE
• Gunnar Armbrecht · Raubling, DE
• Peter Awakowicz · Munich, DE
• Thomas Musch · Neheim, DE
• Sven Gröger · Bochum, DE
• Andre Bergner · Bottrop, DE
• Gordon Notzon · Bochum, DE
• Marcel Van Delden · Bochum, DE

Key dates

• Filing date: Apr 11, 2017
• Grant date: Apr 6, 2021
• Expiry date: Apr 11, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01T13/46
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to a spark plug (100) for an internal combustion engine, in particular having a high frequency ignition system, having a central electrode (28; 128), a ground electrode (12; 112) and an electrical insulator (18; 118) arranged between the central electrode (28; 128) and the ground electrode (12; 112), wherein a central electrode connecting point (26; 126) for electrically connecting the central electrode (28; 128) to an ignition system is provided on the insulator (18; 118), wherein the central electrode (28; 128) and the ground electrode (12; 112) project beyond the insulator (18; 118) at an axial end (114) of the spark plug (100) and each form, with a part projecting axially beyond the insulator (18; 118), a central electrode end (140) and a ground electrode end (142), wherein the central electrode end (140) and the ground electrode end (142) are arranged and embodied in such a way that an axial region (170) of a gap (146) is formed between them in an axial direction, wherein the axial region (170) of the gap (146) is spaced apart from the insulator (18; 118), wherein at least one additional electrode (150) is provided which projects beyond the insulator (118…