Abstract: An engine control module and method configured to correct an engine crank sensor signal for errors in an apparent location of a tooth edge on a crank wheel is provided. A correction factor is determined based on a first formula if a comparison of adjacent pulse intervals to predetermined thresholds indicates that a tooth edge appears to be abnormally late, and determined based on a second formula if a comparison of adjacent pulse intervals to other predetermined thresholds indicates that a tooth edge appears to be abnormally The correction factor is set to a null value if the correction factor is not determined based on the first formula or the second formula; and operating an engine based on the correction factor.

Abstract: The final rest position of an internal combustion engine crankshaft is determined by counting pulses of a CRANK signal responsive to crankshaft rotation after engine turn-off and evaluating the timing of the pulse edges to detect reversals in the direction of crankshaft rotation. Times are assigned to a given edge of each CRANK signal pulse, and a ratio of specified time intervals is compared to a threshold to detect crankshaft rock-back for controlling the pulse count direction.

Abstract: The final rest position of an internal combustion engine crankshaft is determined by counting pulses of a CRANK signal responsive to crankshaft rotation after engine turn-off and evaluating the timing of the pulse edges to detect reversals in the direction of crankshaft rotation. Times are assigned to a given edge of each CRANK signal pulse, and a ratio of specified time intervals is compared to a threshold to detect crankshaft rock-back for controlling the pulse count direction.

Abstract: A technique for implementing an extended bit timer with a time processing unit (TPU), without using the channel hardware of the TPU includes a number of steps. A timer of the TPU is periodically read to determine the value of the timer. A counter is incremented when rollover of the timer has occurred and a coherency flag is de-asserted after the timer transitions through a first count. The coherency flag is asserted after the value of the timer transitions through a third count and the value of the timer is combined with the value of the counter to provide a current count. When the coherency flag is asserted and the value of the timer is equal to or between the first and second counts, the current count is adjusted.