Electromagnetic rotary actuator

US5229671A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Neidhard · Wendelstein, DE
• Harald Kalippke
• Friedrich Wendel · Rutesheim, DE
• Erhard Renninger · Markgröningen, DE
• Wolfgang Staudenmaier · Waiblingen, DE
• Johannes Meiwes · Markgröningen, DE
• Albert Gerhard · Tamm, DE
• Dieter Dick · Rochlitz, DE
• Herbert Becker · Coburg, DE

Key dates

• Filing date: Feb 12, 1992
• Grant date: Jul 20, 1993
• Expiry date: Feb 12, 2012

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2003/067
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a rotary actuator (1) with rotary slide valve (3) for controlling a throttle cross-section, the sealing of the pneumatic (16) and of the electrical part (17) is to be improved. For this purpose, the shaft (11) is supported twofold, both on this side and on the other side of the rotary slide valve (3). Both roller bearings (13, 14) are located in a one-piece housing (12). As a result, the tolerance-related width of the air gap between rotary slide valve (3) and control opening (6) is reduced, on the one hand, and, on the other hand, an isolating seal between the parts (16) and (17) is formed by the bearing (13). The rotary actuator (1) is particularly suitable as idle-speed rotary actuator for internal combustion engines.