Method for conveying a metered hydraulic volume in a vehicle braking system by means of an electrically driven motor pump assembly and vehicle braking system

US9873417B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Michael Kutzner · Pocking, DE
• Alexander Treib · Steinbach, DE
• Hans Schroth · Neuberg, DE
• Peter Handke · Frankfurt am Main, DE
• Abolfazl Akbari-Namwar · Groß-Gerau, DE

Key dates

• Filing date: May 15, 2014
• Grant date: Jan 23, 2018
• Expiry date: Jun 17, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B49/06
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for conveying a metered hydraulic volume in a vehicle braking system by an electrically driven motor pump assembly, wherein a mechanical pump of the motor pump assembly is driven by an electric motor of the motor pump assembly. A rising motor voltage ramp is applied to the electric motor, a motor current being detected, and a conveying mode of the motor pump assembly starting as soon as a motor torque generated by the motor current exceeds a total of drag torque, breakaway torque and friction torque of the motor pump assembly. The motor current reduces when the conveying mode starts. The method is characterized in that, when a reduction in the motor current is detected after a specified time interval has elapsed, a motor voltage is reduced to a value which ends the conveying mode. The invention further relates to a vehicle braking system.