Patent ID: 11873773
Assignee: HONDA MOTOR CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 7:
8. A method for early camshaft position detection in an encoded crankshaft system, the method comprising:
identifying a tooth type for N number of teeth on a crank pulse wheel in a sliding buffer based on at least one tooth characteristic, wherein N is a positive integer less than a total number of teeth of the crank pulse wheel, and wherein the crank pulse wheel has a first crankshaft rotation and a second crankshaft rotation in an engine cycle;
calculating a buffer value for the sliding buffer corresponding to the N number of teeth represented in the sliding buffer;
determining a crankshaft angular position of the crank pulse wheel based on the buffer value;
receiving a sensed camshaft value for a camshaft wheel having a camshaft rotation in the engine cycle based on a camshaft signal from a camshaft sensor, wherein the engine cycle is defined by a single camshaft rotation and the first crankshaft rotation and the second crankshaft rotation;
determining if the engine cycle is in the first crankshaft rotation or the second crankshaft rotation of the crank pulse wheel based on the crankshaft angular position of the crank pulse wheel and the sensed camshaft value; and
controlling engine operation based on the determination of whether the engine cycle is in the first crankshaft rotation or the second crankshaft rotation of the crank pulse wheel.