Patent ID: 6999869
Filing Date: 2006-02-14
Classification: F02D

Abstract:
1. In combination with an internal combustion engine, said engine having a timing gear which communicates angular timing position and RPM signals via a crankshaft sensor to an engine controller, said engine controller having a stored logic engine control system based on a timing gear having a single missing tooth, said engine controller outputting control signals to a fuel injector(s), wherein said timing gear has one or more missing teeth which are used as a reference position on the timing gear, the improvement comprising: a logic circuit simulator means in the engine controller functioning to electronically replace the one or more missing teeth over the standard one missing tooth, thereby enabling the stored logic engine control system to function; wherein the logic circuit simulator further comprises a crankshaft sensor signal processing module means functioning to determine a crankshaft position and rotations, a stored memory of tooth count and tooth speed, means functioning to store crankshaft rotation data, a simulator logic module means and an output signal generator means functioning to provide an electronic equivalent for the missing tooth (or teeth); and wherein the logic circuit simulator means further comprises a user programmable variable module means functioning to define a specified number of missing teeth.