Adjustment device for rotary angle adjustment

US4388913A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gerold Grimm · Leonberg, DE
• Klaus Rose · Mundelsheim, DE
• Ulrich Kemmner · Sachsenheim, DE
• Rainer Schillinger · Glückstadt, DE
• Alois Stemmer · Leinfelden, DE

Key dates

• Filing date: Dec 17, 1980
• Grant date: Jun 21, 1983
• Expiry date: Dec 17, 2000

Classification

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

Abstract

An adjustment device having a servomotor and arranged for rotary angle adjustment is proposed. The rotary portion is connected via a shaft with a throttle device which controls the cross section of a bypass line bypassing a throttle valve disposed in the intake tube of an internal combustion engine. The adjustment device is axially limited on one end by a cap, which is embodied as a cast part together with a portion of the bypass line. The throttle device is embodied as a rotary slide and with a control portion transversely penetrates the cap and the bypass with the control portion arranged to open the bypass to a greater or lesser extent depending on the position of the rotary slide. Between an armature of the servomotor and the rotary slide, a sealing disc is loosely guided on the shaft. As a result of a pressure drop at the sealing disc, the sealing disc can be pressed against a sealing face of the cap in order to keep the leakage air quantity as small as possible.