Electromagnet for a hydraulic system

US10662983B2 · kind B2 · utility

Assignees

• AUDI AG · DE
• VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

• Dietmar Schuller · Altmannstein, DE
• Roland Meyer · Jeffery Road, DE
• Christian Corell · Oberjossa, DE
• Oliver RANG · Kassel, DE

Key dates

• Filing date: May 8, 2015
• Grant date: May 26, 2020
• Expiry date: Oct 20, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0253
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electromagnet for a hydraulic system, such as an automatic transmission of a motor vehicle. The electromagnet may include an armature chamber filled with hydraulic medium, which may be fluidically connected to hydraulic lines of the hydraulic system, and may have an armature mounted therein. The armature may have an adjustable stroke and may include a shut-off body. The armature may divide the armature chamber into an opening-side chamber facing the flow opening, and an inner chamber facing away from it. During a stroke movement of the armature, an oil exchange may occur, during which a displacement volume of the hydraulic medium overflows from the opening-side chamber into the inner chamber. The electromagnet may further include a hydraulic medium reservoir, which may store a hydraulic medium having a higher degree of purity than the hydraulic medium in the hydraulic lines and which may be fluidically connected to the opening-side chamber.