Hydraulic unit for producing brake pressure for a motor-vehicle brake system

US10272892B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Lothar Brandt · Wiesbaden, DE
• Mike Cichy · Candler, US
• Bjorn Klein · Friedberg, DE
• Jörg Loke · Brechen, DE
• Erkan Sarac · Echzell, DE

Key dates

• Filing date: Jun 23, 2016
• Grant date: Apr 30, 2019
• Expiry date: Jun 23, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T11/20
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A hydraulic unit for producing brake pressure for a hydraulic motor-vehicle brake system, including a main body, a cavity arranged in the main body and having at least one first bore segment with a defined target diameter, in which a cylindrical piston moveable in the axial direction is arranged, which, in the cavity, bounds at least one pressure chamber filled with a hydraulic fluid, for producing brake pressure in a brake circuit, and at least a first and a second sealing element for sealing off the cylindrical piston, which sealing elements are arranged at an axial distance from each other. In order to provide a hydraulic unit that can be produced more effectively and economically while the technical requirements nevertheless remain fulfilled, the material of the main body in a surface layer of an inner wall of the cavity in the bore segment has a material microstructure that is work-hardened.