Patent ID: 11859570
Assignee: VITESCO TECHNOLOGIES GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 19:
20. A method of synchronization between a crankshaft signal supplied by a crankshaft sensor associated with a crankshaft toothed wheel, and a camshaft signal supplied by a “True Power On” (TPO)-type camshaft sensor associated with the camshaft toothed wheel of claim 1, the method comprising:
during a first revolution of the camshaft toothed wheel upon starting an engine, operating the camshaft sensor with a first sensitivity in which the camshaft sensor is unable to detect the first recessed part nor the first tooth,
comparing a first camshaft signal obtained during the first revolution to a first stored signal model corresponding to a first target wheel with six teeth, including one tooth with a greater angular length than an angular length of remaining teeth, and six recessed parts, including one recessed part with a greater angular length than an angular length of remaining recessed parts,
during subsequent revolutions of the camshaft toothed wheel, operating the camshaft sensor with a second sensitivity greater and more precise than the first sensitivity in which the camshaft sensor is enabled to detect the first recessed part as well as the first tooth,
comparing a second camshaft signal obtained during the subsequent revolutions to a second stored signal model corresponding to a second target wheel including eight teeth with falling edges evenly distributed about an outer periphery of the second target wheel, and
synchronizing the engine in real time by combining the comparing of each camshaft signal with a respective crankshaft signal.