Method for determining an upward journey for all-wheel drive...

Details Method for determining an upward journey for all-wheel drive... Method for determining an upward journey for all-wheel drive...

2003-02-13

2008-11-11

Jeangla, Gertrude Arthur (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S069000, C701S070000, C701S079000, C701S211000, C303S138000, C303S168000, C180S197000

Reexamination Certificate

active

07451043

ABSTRACT:
A method for controlling driving on a hill of an all-wheel drive vehicle, wherein vehicle acceleration is determined and the gravitational acceleration is measured. To improve the accuracy of the determination of the vehicle reference speed in all-wheel drive vehicles, the method comprises the following steps: determining the acceleration at the secondary axle (Tc4wdHaAcc) from one or both of the two wheel speeds, determining the deviation (Slope) between the acceleration at the secondary axle (Tc4wdHaAcc) and the measured acceleration (LoSenAcc), filtering the determined deviation (SlopFilt) with a time constant (T1Slope), comparing the deviation (Slope) with the filtered deviation (SlopFilt), determining driving situations representing the conditions ‘traction slip control is active’ or ‘traction slip control is not active’, and determining the slope in dependence on the comparison result and the driving situation.

REFERENCES:
patent: 4974163 (1990-11-01), Yasuno et al.
patent: 38 09 101 (1989-09-01), None
patent: 197 32 554 (1999-02-01), None
International Search Report of Application No. PCT/EP03/01417 dated Aug. 28, 2003.
Patent Abstract of Japanese Publication No. 2002046509.

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