Valve system for the pre-engagement unit of a braking pressure modulator

US6453936B1 · kind B1 · utility

Assignee

• Wabco GmbH & Co. Ohg. · DE

Inventors

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

Key dates

• Filing date: Feb 23, 2001
• Grant date: Sep 24, 2002
• Expiry date: Feb 23, 2021

Classification

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

Abstract

A valve system for the pre-engagement unit of a vehicle braking pressure modulator contains solenoid valves, which are controlled by an electronic braking system. Pneumatic pressure is fed into a brake cylinder on the vehicle wheels via a pressure regulating channel of the pre-engagement unit. The solenoid valves are configured as cartridge solenoid valves, so that assembly is simplified, and utilization of elastic tolerance compensating elements is unnecessary. A preferred embodiment includes three cylinder bodies connected end-to-end with no increase in cylinder diameter. This embodiment enables the use of identical armatures and identical magnet coils for different valve types, such as 3/2-way solenoid valves or 2/2-way solenoid valves. Also, these valves may be configured as normally open or normally closed, with identical outside dimensions. As such, three cartridge solenoid valves can be combined into a compact triple valve cartridge unit that further simplifies the assembly process.