Fault tolerant air bag bus system without transformer

US6512308B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Hendrik Boezen · Nijmegen, NL
• Aloysius Johannes Maria Boomkamp · Nijmegen, NL
• Martinus Bredius · Delft, NL
• Peter Buehring · Hamburg, DE
• Patrick Heuts · Nijmegen, NL
• Abraham Klaas Van Den Heuvel · Nijmegen, NL
• Egon Joehnk · Norderstedt, DE
• Maarten Visser · Nijmegen, NL
• Ruurd Anne Visser · Nijmegen, NL

Key dates

• Filing date: Apr 19, 2001
• Grant date: Jan 28, 2003
• Expiry date: Apr 20, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2021/01075
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A fault tolerant air bag system needs a floating supply, which supply conventionally is made by means of a DC-DC converter with a transformer. By splitting the main energy reserve capacitor (14) into two capacitors (14, 34), and coupling one of the capacitors (34) to the other (14) by means of switches (36, 38) which open during a crash, no transformer is needed any more.