Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
2005-06-07
2005-06-07
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C701S074000, C340S429000
Reexamination Certificate
active
06904349
ABSTRACT:
A method is provided capable of improving the accuracy of estimations of quantities that represent the state of a vehicle, such as vehicle speed, wheel slip ratio, wheel speed along the ground, longitudinal wheel force and the vehicle body sideslip angle, or values related to the quantities that represent the vehicle state, using a simple and inexpensive method. A tire longitudinal force computing unit81calculates longitudinal forces F1to F4of each of the wheels by substituting a coefficient of friction μ, which is adjusted such that a deviation between a detected value of a longitudinal acceleration Gxand an estimated longitudinal acceleration Gxeis zero, an estimated vehicle speed Ve, slip ratios S1to S4of each of the wheels calculated based on detected values of sensors11and31, loads W1to W4of each of the wheels, calculated based on detected values of sensors12and61, and lateral forces Y1to Y4, into an equation related to a predetermined tire dynamics model. A longitudinal acceleration estimating unit82calculates an estimated longitudinal acceleration Gxebased on the longitudinal forces F1to F4and a predetermined movement equation. An integrator43integrates with respect to time the estimated longitudinal acceleration Gxe, and calculates an estimated vehicle speed Ve.
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Camby Richard M.
Honda Giken Kogyo Kabushiki Kaisha
Merchant & Gould P.C.
Tran Dalena
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