Process for determination of friction/slip characteristics of the tires of a road vehicle and slip control system for carrying out the process

US5599076A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Manfred Burckhardt
• Gerd Eilert · Schwaikheim, DE
• Rainer Freitag · Owen, DE
• Armin Mueller · Stuttgart, DE
• Reinhold Schoeb · Traunreut, DE
• Rainer Spiecker · Weingarten, DE
• Sinan Kazan · Eßlingen, DE
• Richard Zimmer · Fellbach, DE

Key dates

• Filing date: May 10, 1994
• Grant date: Feb 4, 1997
• Expiry date: May 10, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2270/208
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A slip control system determines friction/slip characteristics of tires of a road vehicle equipped both with an antilock system to permit an individual brake pressure control on individual vehicle wheels. The front wheel brakes are connected to a primary output pressure space of the tandem master cylinder, and the rear wheel brakes are connected to a secondary output pressure space of the tandem master cylinder. A first bore stage of a housing of the tandem master cylinder forms a housing-defined boundary of the secondary output pressure space. An inner piston flange movably seals off a pressureless downstream chamber in relation to an inner portion of the first bore stage. An intermediate wall of the housing delimits the bore stage relative to a central bore stage which extends from a third bore stage receiving a primary piston. An actuating piston is displaceably guided in the central bore stage in a pressure tight manner and forms an axially movable, inner boundary of the primary output pressure space relative to a pressureless downstream chamber in the central bore stage which is bounded by the intermediate wall. An annular space is bounded in an axially movable manner by an in…