Method for calculating a friction-slippage curve for a tire

• Main Author: ALBOHR OLIVER,GARRO LUCIANO,KUHLMANN UDO,PEVERI VITTORIO,PERSSON BO N. J.,PINTO ALESSANDRO
• Format: Patent
• Language: English
• Published: 17.10.2007
• Subjects: DEVICES OR ARRANGEMENTS RELATED TO TYRES; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PERFORMING OPERATIONS; PHYSICS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL

To provide a method for calculating a -slippage curve for a tire (10) based on laboratory data derived from characteristic values of a used compound, of the road surface and the car without producing a complete tire a method for calculating a -slippage curve for a tire (10) is proposed comprising the steps: calculating a friction force F 0i (t) between rubber compound and a rough surface (14) based on a friction coeficient (t) for different slippage values s slip and lateral positions (i) of the tire (22), wherein the friction coefficient (t) is calculated depending on a sliding velocity v b between the rough surface (14) and a tread block (11) and on a temperature Tq(t) of the tire (Sub1). After calculating the friction force F 0i (t) the motion of a tread block (11) depending on a pressure distribution during the movement of the tread block (11) through the contact area A 0 and on characteristics of a tire body (12) is calculated (23). The resulting -slippage curve is composed from effective -slippage values slip for different values s slip (25), wherein effective -slippage values slip are calculated based on the friction force F 0i (t) and a nominal force F Ni (t) derived from the pressure distribution (24).