Patent ID: 11946426
Assignee: VITESCO TECHNOLOGIES GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A method for controlling a variable valve timing system, the variable valve timing system comprising one or more intake camshaft(s) and one or more exhaust camshaft(s) and a crankshaft, the method comprising:
determining a reference minimum speed position of the crankshaft associated with a current phase shift of a specific camshaft;
controlling a phase shift of the specific camshaft relative to the crankshaft;
determining a specific minimum speed position, the specific minimum speed position corresponding to an angular position of the crankshaft during a cycle for which the speed of rotation of the crankshaft passes through a minimum;
determining a difference in the specific minimum speed position between the specific minimum speed position and the reference minimum speed position; and
determining a phase shift of the specific camshaft relative to the crankshaft on the basis of the difference in the specific minimum speed position.