Method for reliably operating a motor vehicle

US5119300A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ralf-Michael Bartke · Bühl, DE
• Gerhard Stumpp · Stuttgart, DE
• Dieter Seher · Ilsfeld, DE
• Hermann Kull · Stuttgart, DE

Key dates

• Filing date: Jul 12, 1990
• Grant date: Jun 2, 1992
• Expiry date: Jul 12, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D18/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Sensors for motor vehicles emit a base signal when the variable which they measure takes on a base value. For example, a road-speed transducer supplies no pulses when either the vehicle is at standstill or when the sensor is defective. A method for providing a reliable operation of a motor vehicle includes the step of starting a substitute/emergency-function immediately when only the base signal is received from the sensor. If it is later determined that the base signal was only emitted because the measured variable took on its base value, then the substitute/emergency-function is again reversed. By starting a substitute/emergency-function basically always when a checked sensor emits no signal, it is ensured that safety measures are taken as rapidly as possible.