Method for determining a model upstream pressure by means of a mathematical model in an electronically regulated motor vehicle brake system

US9180847B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Michael Stein · Wuppertal, DE
• Jochen Zimmermann · Wuppertal, DE
• Joachim Borneis · Darmstadt, DE
• Dieter Burkhard · Pirmasens, DE

Key dates

• Filing date: Aug 9, 2012
• Grant date: Nov 10, 2015
• Expiry date: Aug 9, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2270/308
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Method for determining a model upstream pressure (PTMCmod) using a mathematical model in a motor vehicle brake system. An electrically controllable hydraulic valve (7a, 7b) control brake pressure on a wheel brake. Wheel sensors (10a, 10b) provide a vehicle speed signal. From the vehicle speed signal (vref) generating at least a first low pass filtered vehicle speed signal (Vreffast, Vrefhard, Vrefsoft) for using with a first limit frequency (fg1, fg2, fg3), from whose time profile the point in time (t1) of a significant decrease is detected, used for determining a time duration (Timer) starting with deceleration of the vehicle, which ends at the onset of regulation of the braking process. For the classification of the actuation speed of the brake pedal (16) the time duration (Timer) is compared with one or more threshold values (SW1, SW2). Depending on the comparison, determining a model upstream pressure (PTMCmod) using the mathematical model.