Method for quantitatively analyzing steer characteristics to...

Details Method for quantitatively analyzing steer characteristics to... Method for quantitatively analyzing steer characteristics to...

2006-11-28

2006-11-28

Chin, Gary (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle diagnosis or maintenance indication

C701S041000

Reexamination Certificate

active

07142961

ABSTRACT:
A method for quantitatively analyzing steer characteristics to acquire steering stability of vehicles/tires. The method divides the steer characteristics into understeer, oversteer, and power-off reaction characteristics, separately analyzes the understeer, oversteer, and power-off reaction characteristics, analyzes the understeer characteristic using a tuning curvature and a turning velocity characteristic in association with a vehicle turning path, analyzes the oversteer characteristic using a slope of a nose angle and a nose-angle time rate in association with a vehicle attitude, analyzes the power-off reaction characteristic using a nose-angle slope, a nose-angle change rate, and a nose-angle change amount, and compares the above-mentioned characteristics with reference data obtained from a Quasi steady-state condition test during which a vehicle driving state is stable, such that it can quantitatively determine the steer characteristics upon receipt of the result of the comparison.

REFERENCES:
patent: 4969212 (1990-11-01), Walter
patent: 6033337 (2000-03-01), Ohkuma et al.
patent: 6257056 (2001-07-01), Shibayama et al.
patent: 6466857 (2002-10-01), Belvo
patent: 6580980 (2003-06-01), Gauthier et al.
patent: 2004/0162662 (2004-08-01), Bremeier et al.

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