Control device of an electromagnetic actuator for a restraint means

US9975511B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ruediger Karner · Kornwestheim, DE
• Hartmut Schumacher · Freiberg, DE

Key dates

• Filing date: Jun 1, 2015
• Grant date: May 22, 2018
• Expiry date: Jun 1, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2021/26094
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A control device of an electromagnetic actuator for a restraint device, including an evaluation and control unit which generates a control signal which predefines a control sequence having control time periods, in which the actuator is activated, and pause time periods, in which the actuator is deactivated. A protective circuit including a counter is provided, the counter monitoring the control sequence and increments its counter content during the at least one control time period and decrements its counter content during the at least one pause time period, the protective circuit effectuating a deactivation of the actuator when the counter content reaches or exceeds a predefined first threshold value, and allows a reactivation of the actuator when the counter content reaches or falls below a predefined second threshold value after reaching or exceeding the first threshold value, the first counter content being greater than the second counter content.