Electronic traction control

摘要

In general, the subject matter described in this specification can be embodied in methods, systems, and program products for performing vehicle traction control. Time intervals between points of rotation of a rotating vehicle output shaft are measured. Indicators of shaft rotation rate are generated using, for each generated indicator, a set of one or more of the time intervals. The generated indicators of shaft rotation rate are used to determine a value indicative of a rate of change of shaft rotation rate. An indicator of a maximum allowable output shaft rotation rate is computed. A current indicator of output shaft rotation rate is determined to exceed the maximum allowable output shaft rotation rate. In response to determining that the current indicator exceeds the maximum allowable output shaft rotation rate, a signal to trigger application of a traction control mechanism is output.

主权项

1. A computer-implemented method for determining an acceleration or velocity of a rotating vehicle shaft, comprising:
measuring, by a computing system, a first time interval between two points of rotation of a rotating vehicle shaft by measuring a time interval between (a) receiving an indication that a first discrete point on the rotating vehicle shaft has rotated past a fixed reference point, and (b) receiving an indication that a second discrete point on the rotating vehicle shaft has rotated past the fixed reference point; measuring, by the computing system, a second time interval between two other points of rotation of the rotating vehicle shaft by measuring a time interval between (a) receiving an indication that a third discrete point on the rotating vehicle shaft has rotated past the fixed reference point, and (b) receiving an indication that a fourth discrete point on the rotating vehicle shaft has rotated past the fixed reference point; and determining, by the computing system, an acceleration or velocity of the rotating vehicle shaft using the measured first time interval between the two points of rotation of the rotating vehicle shaft and the second time interval between the two other points of rotation of the rotating vehicle shaft.