Volvo Lastvagnar Ab

Sören Bystedt

Mats Sabelström

Jan-Inge Svensson

Peter Lingman

Bengt Terborn

The invention relates to a method for measuring and estimating a brake factor in a vehicle brake system, said vehicle including a towing vehicle and a trailer having a plurality of wheel axles, wherein said method includes: initiating a controlled braking manoeuvre involving at least a first wheel axle and a second wheel axle; and obtaining values representing said brake factor for said wheel first wheel axle and said second wheel axle by a control unit which is provided with a brake adaptation function to obtain a brake balance between said towing vehicle and said trailer. The method furthermore includes: braking, in a forced manner, said first wheel axle when retardation of said vehicle is requested; estimating the brake factor for said first wheel axle by determining the brake pressure and braking torque for said first wheel axle; providing a transition phase after which said second wheel axle is braked, in a forced manner, and estimating the brake factor for said second wheel axle by determining the brake pressure and braking torque for said second wheel axle. An arrangement for measuring and estimating the brake factor in a vehicle brake system is also disclosed.

Method and arrangement for measuring and estimating a brake factor in a vehicle brake system

A compressed air supply system including a compressor (), a compressed air line () that connects an outlet () from the said compressor to an inlet () to a first active component (), and an adjustable fan () which is controlled by a control unit and is arranged to generate an air flow intended to cool the said compressed air line (), and a vehicle comprising such a system.

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Torslanda, Sweden

Sören Bystedt