Brake system which maintains brake force distribution upon system malfunction while partially disabling anti-lock and traction slip

US5795039A · kind A · utility

Assignee

• ITT Automotive Europe GmbH · DE

Inventors

• Helmut Fennel · Bad Soden, DE
• Norbert Ehmer · Bad Orb, DE
• Alexander Kolbe · Camburg, DE
• Robert Kyle Schmidt · Liederbach am Taunus, DE
• Thomas Proger · Rödermark, DE

Key dates

• Filing date: Jan 14, 1997
• Grant date: Aug 18, 1998
• Expiry date: Jan 14, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2270/416
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A circuit for a brake system with pressure fluid distribution, anti-lock control, and traction slip control. The circuit includes circuits to monitor the brake system and to change over or disconnect the control in response to defects and/or the respective control situation or driving situation. Upon failure of any one of the sensors which sense wheel rotation behavior or one sensor per axle or in the presence of an incorrect sensor signal, the vehicle reference speed is produced on basis of the intact sensors, and an electronic brake force distribution control function is still possible, however, an anti-lock control or a traction slip control is prevented. When the defective sensor is a rear-wheel sensor, both rear wheels are controlled synchronously. Upon the occurrence of a defect or a malfunction of a hydraulic pump system or when the supply voltage drops, an electronic brake force distribution control function is possible until a defined limit value, however, an anti-lock control/traction slip control is prevented.