Pneumatic control system

US4556170A · kind A · utility

Assignee

• Daimler-Benz AG · DE

Inventors

• Franz Bender · Wissen, DE
• Klaus Blumensaat · Weilmünster, DE
• Wolfgang Burthel · Waiblingen, DE

Key dates

• Filing date: Jul 16, 1984
• Grant date: Dec 3, 1985
• Expiry date: Jul 16, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D23/185
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A vacuum control system for devices in vehicles is disclosed, such as for controlling air-conditioning and heating equipment. Temperature-sensitive control valves which are inserted in the cooling-water circuit of an internal-combustion engine are automatically operated at a specific temperature to control a pneumatic actuator located vacuum control circuit for the devices.