Brake system having a blending capability

US10112589B2 · kind B2 · utility

Assignee

• AUDI AG · DE

Inventors

• Thomas Klinger · Ingolstadt, DE
• Wolfgang Schmid · Regensburg, DE

Key dates

• Filing date: Jul 23, 2015
• Grant date: Oct 30, 2018
• Expiry date: Jul 23, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2270/604
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A brake system for a motor vehicle includes separate first and second brake circuits associated to first and second vehicle axles, respectively, and rigidly connected to each other. Hydraulic brake pressure is supplied by a first brake piston of a master cylinder to the first brake circuit and by a second brake piston to the second brake circuit. Operably connected to the first vehicle axle is an electric motor and operates as a recuperator, with a blending device withdrawing hydraulic fluid from the first brake circuit during a recuperation phase of the electric motor. A partition wall between the first and second brake pistons subdivides the master cylinder into a first pressure chamber associated to the first brake piston, and a separate second pressure associated to the second brake piston. A connectable and disconnectable floating piston enables a hydraulic communication between the first and second brake circuits with one another.