Electromagnet for a hydraulic system

US10935056B2 · kind B2 · utility

Assignees

• AUDI AG · DE
• VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

• Dietmar Schuller · Altmannstein, DE
• Andreas Deimel · Ingolstadt, DE
• Michael Schoffmann · Baden, AT
• Roland Meyer · Jeffery Road, DE
• Oliver RANG · Kassel, DE
• Christian Corell · Oberjossa, DE

Key dates

• Filing date: May 8, 2015
• Grant date: Mar 2, 2021
• Expiry date: Sep 21, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/8013
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electromagnetic valve for a hydraulic system for an automatic transmission of a vehicle. An armature chamber is filled with hydraulic medium and fluidically connected to hydraulic lines of the hydraulic system. An armature is mounted in the armature chamber such that its stroke is adjustable. The armature includes a shut-off body and divides the armature chamber into an opening-side chamber facing the flow opening and into an inner chamber facing away from the flow opening. During a stroke of the armature, an oil exchange occurs, and a displacement volume of the hydraulic medium overflows from the opening-side chamber into the inner chamber. A hydraulic line leading to the opening-side chamber or to the inner chamber of the armature chamber includes a dirt collecting element that is designed as a permanent magnet and that retains contaminations in the hydraulic medium that flows through the hydraulic line during an oil exchange.