Motor vehicles – Steering by driving – Endless flexible track
Reexamination Certificate
2006-01-17
2011-11-22
Silbermann, Joanne (Department: 3611)
Motor vehicles
Steering by driving
Endless flexible track
C180S006480, C701S082000
Reexamination Certificate
active
08061459
ABSTRACT:
The present invention provides a traction control method for a tracked vehicle such as a military tank. The method includes calculating a track proportionality factor and a vehicle proportionality factor based on predefined attributes of the tracked vehicle. A minimum turn radius of the tracked vehicle is calculated based on the velocity of the tracked vehicle, the maximum coefficient of friction between the tracks of the tracked vehicle and the ground (0.7), and gravitational acceleration (9.80665 m/s2). A sprocket rotational speed is calculated based on the pitch diameter of the tracked vehicle sprockets and the velocity of the tracked vehicle. Based on the preceding calculations, the method of the present invention calculates a required track speed differential configured to turn the tracked vehicle at the minimum turn radius. If a commanded turn radius is less than the minimum turn radius, the track speed differential of the tracked vehicle is limited to the required track speed differential to prevent the tracked vehicle from slipping.
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GM Global Technology Operations LLC
Quinn Law Group PLLC
Silbermann Joanne
Williams Maurice
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