Electronic traction control
First Claim
1. A computer-implemented method for determining an indication of rotation rate of a vehicle shaft, comprising:
- determining, by a computing system, a first time interval that has elapsed between;
(i) receiving an indication that a first point on a rotatable vehicle shaft has rotated past a fixed point, and(ii) receiving an indication that a second point on the rotatable vehicle shaft has rotated past the fixed point;
determining, by the computing system, a second time interval that has elapsed between;
(i) receiving the indication that the second point on the rotatable vehicle shaft has rotated past the fixed point, or receiving an indication that a third point on the rotatable vehicle shaft has rotated past the fixed point, and(ii) receiving an indication that a fourth point on the rotatable vehicle shaft has rotated past the fixed point; and
determining, by the computing system, an indicator of rotation rate of the rotatable vehicle shaft using;
(i) first time interval that elapsed between receiving the indication that the first point rotated past the fixed point and receiving the indication that the second point rotated past the fixed point, and(ii) the second time interval that elapsed between receiving the indication that the second point on the rotating vehicle shaft has rotated past the fixed point, or receiving the indication that the third point on the rotatable vehicle shaft has rotated past the fixed point, and receiving the indication that the fourth point on the rotatable vehicle shaft has rotated past the fixed point.
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.
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Citations
18 Claims
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1. A computer-implemented method for determining an indication of rotation rate of a vehicle shaft, comprising:
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determining, by a computing system, a first time interval that has elapsed between; (i) receiving an indication that a first point on a rotatable vehicle shaft has rotated past a fixed point, and (ii) receiving an indication that a second point on the rotatable vehicle shaft has rotated past the fixed point; determining, by the computing system, a second time interval that has elapsed between; (i) receiving the indication that the second point on the rotatable vehicle shaft has rotated past the fixed point, or receiving an indication that a third point on the rotatable vehicle shaft has rotated past the fixed point, and (ii) receiving an indication that a fourth point on the rotatable vehicle shaft has rotated past the fixed point; and determining, by the computing system, an indicator of rotation rate of the rotatable vehicle shaft using; (i) first time interval that elapsed between receiving the indication that the first point rotated past the fixed point and receiving the indication that the second point rotated past the fixed point, and (ii) the second time interval that elapsed between receiving the indication that the second point on the rotating vehicle shaft has rotated past the fixed point, or receiving the indication that the third point on the rotatable vehicle shaft has rotated past the fixed point, and receiving the indication that the fourth point on the rotatable vehicle shaft has rotated past the fixed point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-transitory computer-readable storage medium including instructions that, when executed by a processor, cause the processor to perform operations comprising:
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determining, by a computing system, a first time interval that has elapsed between; (i) receiving an indication that a first point on a rotatable vehicle shaft has rotated past a fixed point, and (ii) receiving an indication that a second point on the rotatable vehicle shaft has rotated past the fixed point; determining, by the computing system, a second time interval that has elapsed between; (i) receiving the indication that the second point on the rotatable vehicle shaft has rotated past the fixed point, or receiving an indication that a third point on the rotatable vehicle shaft has rotated past the fixed point, and (ii) receiving an indication that a fourth point on the rotatable vehicle shaft has rotated past the fixed point; and determining, by the computing system, an indicator of rotation rate of the rotatable vehicle shaft using; (i) the first time interval that elapsed between receiving the indication that the first point rotated past the fixed point and receiving the indication that the second point rotated past the fixed point, and (ii) the second time interval that elapsed between receiving the indication that the second point on the rotating vehicle shaft has rotated past the fixed point, or receiving the indication that the third point on the rotatable vehicle shaft has rotated past the fixed point, and receiving the indication that the fourth point on the rotatable vehicle shaft has rotated past the fixed point. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification