Method of controlling the electric heating of a catalytic converter

US5822978A · kind A · utility

Assignee

• AUDI AG · DE

Inventors

• Walter Streit · Ingolstadt, DE
• Rainer Mertl · Garching bei München, DE
• Erhard Otto · Puchheim, DE
• Achim Donnerstag · Braunschweig, DE
• Kurt Maute · Sindelfingen, DE
• Alfred Wirth · Schweinfurt, DE
• Wolfgang Zag · Diez, DE

Key dates

• Filing date: Dec 18, 1996
• Grant date: Oct 20, 1998
• Expiry date: Dec 18, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

This is a method of controlling an electric heater of a catalytic converter. An electric heater is powered by two separate batteries. There are an electronic control unit, a power switch, and an isolating switch providing logic control to the electric heater.