Electronic traction control
First Claim
1. A computer-implemented method to affect rotation of a rotating vehicle shaft, comprising:
- calculating, by a computing system, a time that it took for the rotating vehicle shaft to rotate from a first position to a second position, wherein calculating the time that it took for the rotating vehicle shaft to rotate from the first position to the second position includes measuring a time interval between a sensor identifying passage of the first position and the sensor identifying passage of the second position;
determining, by the computing system and using the calculated time, an indication of an actual rotation rate of the rotating vehicle shaft;
identifying, by the computing system, an indication of an excessive rotation rate of the rotating vehicle shaft for comparison to the indication of the actual rotation rate of the rotating vehicle shaft;
determining, by the computing system and based on the indication of the actual rotation rate of the rotating vehicle shaft and the indication of the excessive rotation rate of the rotating vehicle shaft, whether the actual rotation rate of the rotating vehicle shaft exceeds the excessive rotation rate of the rotating vehicle shaft; and
outputting, by the computing system and in response to the computing system having determined that the actual rotation rate of the rotating vehicle shaft exceeds the excessive rotation rate of the rotating vehicle shaft, a signal to trigger application of a mechanism that limits rotation of the rotating vehicle shaft.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
48 Citations
20 Claims
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1. A computer-implemented method to affect rotation of a rotating vehicle shaft, comprising:
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calculating, by a computing system, a time that it took for the rotating vehicle shaft to rotate from a first position to a second position, wherein calculating the time that it took for the rotating vehicle shaft to rotate from the first position to the second position includes measuring a time interval between a sensor identifying passage of the first position and the sensor identifying passage of the second position; determining, by the computing system and using the calculated time, an indication of an actual rotation rate of the rotating vehicle shaft; identifying, by the computing system, an indication of an excessive rotation rate of the rotating vehicle shaft for comparison to the indication of the actual rotation rate of the rotating vehicle shaft; determining, by the computing system and based on the indication of the actual rotation rate of the rotating vehicle shaft and the indication of the excessive rotation rate of the rotating vehicle shaft, whether the actual rotation rate of the rotating vehicle shaft exceeds the excessive rotation rate of the rotating vehicle shaft; and outputting, by the computing system and in response to the computing system having determined that the actual rotation rate of the rotating vehicle shaft exceeds the excessive rotation rate of the rotating vehicle shaft, a signal to trigger application of a mechanism that limits rotation of the rotating vehicle shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A non-transitory computer-readable storage medium that includes instructions to affect rotation of a rotating vehicle shaft, the instructions, when executed by a processor, cause the processor to perform operations that comprise:
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calculating, by a computing system, a time that it took for the rotating vehicle shaft to rotate from a first position to a second position, wherein calculating the time that it took for the rotating vehicle shaft to rotate from the first position to the second position includes measuring a time interval between a sensor identifying passage of the first position and the sensor identifying passage of the second position; determining, by the computing system and using the calculated time, an indication of an actual rotation rate of the rotating vehicle shaft; identifying, by the computing system, an indication of an excessive rotation rate of the rotating vehicle shaft for comparison to the indication of the actual rotation rate of the rotating vehicle shaft; determining, by the computing system and based on the indication of the actual rotation rate of the rotating vehicle shaft and the indication of the excessive rotation rate of the rotating vehicle shaft, whether the actual rotation rate of the rotating vehicle shaft exceeds the excessive rotation rate of the rotating vehicle shaft; and outputting, by the computing system and in response to the computing system having determined that the actual rotation rate of the rotating vehicle shaft exceeds the excessive rotation rate of the rotating vehicle shaft, a signal to trigger application of a mechanism that limits rotation of the rotating vehicle shaft. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification