Method of operating a pneumatic brake booster

US5979292A · kind A · utility

Assignee

• ITT MANUFACTURING ENTERPRISES LLC · US

Inventors

• Christof Klesen · Seeheim-Jugenheim, DE
• Jochen Führer · Darmstadt, DE
• Michael Vogt · Frankfurt am Main, DE
• Heinz Zingel · Bad Camberg, DE
• Thorsten Neu · Runkel, DE
• Michael Zydek · Langgöns, DE
• Stefan Krebs · Krefeld, DE
• Thomas Berthold · Munich, DE

Key dates

• Filing date: Jul 2, 1998
• Grant date: Nov 9, 1999
• Expiry date: Jul 2, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T13/72
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In a method of operating an electromechanically actuatable pneumatic brake booster, an electromagnet which actuates a sealing seat of its control valve is energized in an interval by a short current pulse of maximum current strength with a subsequent ramp-like current rise, and the current being furnished to the electromagnet is decreased when a fixed value of the pressure that prevails in a master brake cylinder connected downstream of the brake booster is reached. When the hydraulic pressure introduced into the master brake cylinder reaches a nominal value, the current being furnished to the electromagnet is supplied by a pressure controller which maintains the hydraulic pressure constant.