Patent ID: 7451043
Filing Date: 2008-11-11
Classification: B60K,B60T,B60W

Abstract:
1. Method for controlling driving on a hill for all-wheel drive vehicles, wherein vehicle acceleration is determined and an acceleration of the vehicle is measured, comprising the steps of: determining an acceleration at a secondary axle (Tc4wdHaAcc) from one or both of two wheel speeds; determining a deviation (Slope) between the acceleration at the secondary axle (Tc4wdHaAcc) and the measured acceleration (LoSenAcc); filtering the deviation (Slope) with a time constant (T1 comparing the deviation (Slope) with the filtered deviation (SlopeFilt); determining driving situations representing conditions of ‘traction slip control is active’ or ‘traction slip control is not active’; and determining a slope in dependence on comparison of the deviation (Slope) with the filtered deviation (SlopeFilt) result and on the driving situation.