Wheel slippage control system

US5879063A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Carlos Atoche-Juarez · Beverly Hills, US
• Peter Dominke · Bietigheim-Bissingen, DE
• Werner Weber · Munich, DE
• Edgar Bernardi · Dormagen, DE

Key dates

• Filing date: Jan 29, 1992
• Grant date: Mar 9, 1999
• Expiry date: Jan 29, 2012

Classification

• Technology area (CPC —): General

Abstract

A processing circuit has a computing cycle divided into several subcycles of uniform duration. The time base values of the last three nulls of a square wave signal produced from the sinusoidal signal of a wheel speed sensor are stored in a register with three places. At the beginning of a subcycle the difference D of the latest and of the oldest time base values stored in the register is formed and in some cases after limiting is converted to a value 1/D and stored, while the previously stored oldest value is erased. At the start of a new computing cycle the stored value 1/D is further processed as the new wheel speed.