Early EFi Renault engines came with an unusual trigger pattern on their flywheel. 20 teeth followed by one tooth twice the normal tooth width, followed by a missing tooth twice the normal tooth width.
Are you sure about this? (or is it just speculation after seeing the electronic signal?) Do you have a picture of the wheel ?
This pattern occurs twice to indicate TDC & BDC.
A trigger log of the flywheel has been made:
http://vems.hu/www.vems.co.uk/VEMSTrigger/RenaultToothTimes.txt
Using the Examples from http://www.vems.hu/wiki/index.php?page=InputTrigger%2FTriggerLog
This looks like an inverted sensor.\n
... .... 455 4416 # long 457 2929 # long 459 1835 461 1838 463 1866 465 1834 467 1822 469 1822 471 1844 473 1815 475 1803 477 1836 479 1799 481 1799 483 1801 485 1831 487 1802 489 1811 491 1847 493 1813 495 4480 # long 497 2873 # long ... one crank rotation later position 495-455 = 40 499 1837 501 1829 503 1840
Looks like a 22-2 teeth pattern (20 tooth: the 40 difference is normal, comes from the way the log is made), but inverted.
Can this trigger pattern be used with our existing Triggering algorithm?
- yes, even standard config would work, that is almost equivalent to advanced multitooth filter thresholds normal=tooth=0..150% and missing_tooth=150%..any