Bumpless crankshift position sensing

Abstract

Disclosed herein are methods of generating an active crank series of signals that is derived from at least two series of signals, wherein one or both of the series of signals have been modulated to produce two series of signals that resemble each other. Also disclosed herein is a crankshaft positioning system for determining the rotational position of a crankshaft of an engine that utilizes at least two crank angle sensorsand. The signal information from the two crank angle sensorsandis processed by a signal processorsuch that the series of signalsfrom the second crank angle sensoremulates the series of signalsfrom the first crank angle processor. The signal processor generates an active crank series of signalsbased on the two series of signals. The active crank series of signalsis sent to an engine control processorwhich directs the injection and/or ignition of fuel into cylinders of an engine. According to the system exemplified herein, the active crank series of signalssent to the engine control processoris not disrupted despite failure of one of the crank angle sensors. These and other embodiments are disclosed.