Method for determining a triggering threshold value for an automatic brake application

US5836660A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Franz Brugger · Winnenden, DE
• Bernd Knoff · Jeffery Road, DE
• Wolfgang Kiesewetter · Waiblingen, DE
• Albrecht Eckl · Stuttgart, DE
• Manfred Steiner · Rennweg am Katschberg, AT

Key dates

• Filing date: Oct 30, 1996
• Grant date: Nov 17, 1998
• Expiry date: Oct 30, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T7/12
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The invention provides a method for determining a threshold value for triggering an automatic brake application wherein a braking pressure greater than that corresponding to the position of the brake pedal is developed when the actuating speed of the brake pedal exceeds a triggering threshold value determined from a preset threshold value and a vehicle-specific correction factor. According to the invention, a standard curve is stored representing the relationship between the vehicle deceleration and the pedal travel, said standard curve having a pedal travel value sP0 for a vehicle deceleration aFZG0=0 m/s.sup.2. During a brake application, pairs of values for pedal travel and vehicle deceleration are determined several times, with a pedal travel value sPi0 being determined for a vehicle deceleration of 0 M/s.sup.2 corresponding to each value pair, based on a curve that is the same as the standard curve. A sliding average sPm is then calculated from the values of sPi0 obtained, and the relative deviation ABW=sPm/sP0 is then determined from the value sP0 as a vehicle-specific correction factor ABW. The triggering threshold value is then determined as a function of the product of the…