Patent ID: 7058500
Filing Date: 2006-06-06
Classification: F02D

Abstract:
1. An internal combustion engine having: a crankshaft rotatable within an engine block of the engine; at least one camshaft rotatable driven by the crankshaft; wherein the crankshaft is fixed to a crankshaft wheel, such crankshaft wheel having a plurality of crankshaft wheel marks and at least one crankshaft position indicia; wherein the camshaft is fixed to a camshaft wheel having a predetermined pattern of camshaft wheel marks; a crankshaft sensor, fixed to the engine block, for producing a crankshaft signal in response to detection of the crankshaft position indicia; a camshaft sensor, fixed to the engine block, for producing camshaft signals in response to detection of the camshaft wheel marks; wherein rotation of the crankshaft generates a pattern comprising the crankshaft signal and the camshaft signals; and a processor for comparing the generated pattern to a stored reference pattern for determining from such comparison the rotational position of the crankshaft with respect to top dead center of a piston as said piston reciprocates within the engine block.