Circuit configuration for monitoring a plurality of coils

US5638247A · kind A · utility

Assignee

• ITT Automotive Europe GmbH · DE

Inventors

• Heinz Loreck · Weitensfeld im Gurktal, AT
• Michael Zydek · Langgöns, DE
• Tibor Toth · Marburg, DE
• Alois Thone · Friedberg, DE

Key dates

• Filing date: Jun 15, 1995
• Grant date: Jun 10, 1997
• Expiry date: Jun 15, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/58
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a circuit configuration for monitoring a plurality of coils and the final stages for actuating these coils, the coils are connected to the supply voltage by way of a joint supply line and a joint relay. Connected to the supply line, by way of a high-ohmic resistor, is a test voltage source and a first potential monitor, by which the potential prevailing on the supply line is determined after the voltage supply has been interrupted by opening the relay contact. A second potential monitor serves to monitor the proper potential changes on activation of the voltage supply by actuating the relay.