Abstract: A method of protecting an intake manifold of an engine of a hybrid propulsion system including an electric motor comprises detecting a reverse rotation of an engine. A fuel injector of the engine that is rotating in reverse is commanded to cease operation. A spark plug of the engine that is rotating in reverse is commanded to cease operation. The ceasing of reverse rotation of the engine is then confirmed.

Abstract: A reverse rotation detection system for an engine with at least one camshaft and a crankshaft includes a camshaft position sensor that generates a camshaft position signal based on a rotation of the camshaft. A second sensor input device generates a crankshaft position signal based on a rotation of the crankshaft. A control module detects a reverse rotation condition of the engine from the camshaft position signal and the crankshaft position signal, wherein the control module compares the camshaft position signal to the crankshaft position signal to determine an engine position. Based on the engine position the control module compares the camshaft position signal to an expected signal to determine a reverse rotation condition.

Abstract: A method of correcting a cam phaser system failure including detecting a cam phaser system fault and generating a control signal to correct said cam phaser system fault.

Abstract: A method of correcting a cam phaser system failure including detecting a cam phaser system fault and generating a control signal to correct said cam phaser system fault.

Abstract: A method and apparatus for determining the switching states of a target wheel used in an internal combustion engine, the method including providing a camshaft, providing a target wheel having teeth coupled to the camshaft, providing a sensor to detect the teeth of the target wheel, providing a cam phaser to phase the camshaft relative to a crankshaft of the internal combustion engine, homing the cam phaser to a known position relative to the crankshaft, rotating the crankshaft and camshaft, detecting the switching of the teeth by the sensor, referencing switching information detected by the teeth to crankshaft position information to produce a calibration for the target wheel, and storing the calibration in a controller to be use for control of the internal combustion engine.

Abstract: A method and apparatus for determining the switching states of a target wheel used in an internal combustion engine, the method including providing a camshaft, providing a target wheel having teeth coupled to the camshaft, providing a sensor to detect the teeth of the target wheel, providing a cam phaser to phase the camshaft relative to a crankshaft of the internal combustion engine, homing the cam phaser to a known position relative to the crankshaft, rotating the crankshaft and camshaft, detecting the switching of the teeth by the sensor, referencing switching information detected by the teeth to crankshaft position information to produce a calibration for the target wheel, and storing the calibration in a controller to be use for control of the internal combustion engine.

Abstract: A camshaft system for use with an internal combustion engine including a camshaft having a plurality of lobes to actuate valves in the internal combustion engine, a sprocket coupled to the camshaft to drive the camshaft, and a target wheel coupled to the camshaft, the target wheel having an irregular surface capable of providing process data for operation of a plurality of internal combustion engine configurations.

Abstract: An improved fuel compensation method for a variable cam phase engine which predicts the phase of the cam at the midpoint of valve overlap and uses the predicted cam phase to compensate a base fuel pulse for the corresponding amount of diluent. If the cam phase is in transition to a desired value, the cam phase for purposes of compensation may be predicted based on the desired cam phase, current cam phase and its rate of change; otherwise, the cam phase is predicted based on the current cam phase. In a first interval of cam phase transition characterized by nonlinear change in cam phase, the cam phase is predicted by applying a nonlinear offset to the measured cam phase. In a second interval of cam phase transition characterized by substantially linear variation of cam phase, the cam phase is predicted by linear extrapolation of the measured cam phase, and limited to range bounded by the measured cam phase and the desired cam phase.