Braking pressure modulator for an electronic braking system

US6626505B2 · kind B2 · utility

Assignee

• Wabco GmbH & Co. Ohg. · DE

Inventors

• Dieter Frank · Friesach, AT
• Gerdt Schreiber · Altwarmbüchen, DE
• Peter Homann · Neustadt, DE
• Armin Sieker · Bielefeld, DE
• Andreas Kranz · Wunstorf, DE
• Hartmut Schappler · Hannover, DE
• Hans-Klaus Wolff · Springe, DE
• Dirk Meier · Saalfeld, DE

Key dates

• Filing date: Feb 23, 2001
• Grant date: Sep 30, 2003
• Expiry date: Mar 25, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87217
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A pre-engagement unit for a braking pressure modulator for a pressure regulating circuit includes a first pneumatic inlet, a second pneumatic inlet, a first pneumatic output terminal, and a second pneumatic output terminal. The unit includes an electrically actuated valve system having a plurality of solenoid valves and a plurality of electrical terminals connected to output terminals of an electronic control unit. An electric braking command signal transmitter delivers a driver initiated electric brake value setting to an input of the electronic control unit. Under normal conditions, a supply pressure and a redundancy pressure are delivered at the first pneumatic output terminal to be converted by an air quantity augmenting relay valve to a braking pressure. In case of failure of the electronic braking system, the redundancy pressure is delivered at the first pneumatic output terminal to be converted by the air quantity augmenting relay valve to the braking pressure.