Systems and methods for early camshaft position detection in an encoded crankshaft system are provided. In one embodiment, a method includes determining a crankshaft angular position of a crank pulse wheel based on electronic signals received from vehicle sensors. The crank pulse wheel is associated with a cycle including a first crankshaft rotation and a second crankshaft rotation. The method also includes determining a crankshaft angular position from electronic signals received from vehicle sensors. The method yet further includes receiving a sensed camshaft value for a camshaft wheel having a camshaft rotation in the cycle. The method then includes determining if the 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.

Disclosed is a method for processing signals from a crankshaft sensor including the following steps: detection of a stopping of the engine; simulation and transmission of a backwards-running square waveform; and simulation and transmission of a forwards-running square waveform. Also disclosed is a processing module configured to implement such a method.

Identifying position of a first rotating shaft may comprise a first position detection system and a second position detection system. A controller may be coupled to a first sensor and a second sensor and may identify the position of the first shaft using the identified shaft position from either the first detection system or the second detection system, whichever is identified faster. The first shaft may have a first wheel disposed thereon with targets and one or more gaps disposed about the first wheel. A second shaft may have a second wheel disposed thereon with targets and one or more gaps disposed thereon. The second wheel is in a fixed relationship relative to the first wheel. The first detection system may use data simultaneously from the first sensor and the second sensor to eliminate targets to determine position. The second detection system uses data only from the first sensor.

Disclosed is a method for determining the configuration of a combustion engine of a motor vehicle including a step of detecting the reference position of the crankshaft, a step of controlling the control valve of the injection pump, after a predetermined time interval, a step of measuring a fuel pressure value in the injection rail, and a step of determining a first configuration of the engine when the fuel pressure value measured in the injection rail is greater than or equal to a first predetermined pressure threshold or determining a second configuration of the engine when the fuel pressure value measured in the injection rail is between a second predetermined pressure threshold and a third predetermined pressure threshold.

A control system includes a controller. The controller counts the number of driving times of a high pressure fuel pump, which is the number of reciprocating motions of a plunger based on a crank counter. The controller estimates a high pressure system fuel pressure based on the calculated number of driving times, a fuel temperature detected by a fuel temperature sensor, and a low pressure system fuel pressure detected by a low pressure system fuel pressure sensor when the high pressure system fuel pressure is not able to be acquired from a high pressure system fuel pressure sensor. The controller sets an opening period of an in-cylinder fuel injection valve based on the estimated high pressure system fuel pressure and to perform an engine start by an in-cylinder fuel injection when the high pressure system fuel pressure is not able to be acquired from the high pressure system fuel pressure sensor.

Engine control method for protecting the engine during reverse rotation, and involving the following steps: when a first prediction of the engine speed at a next top dead center is below a predetermined lower threshold, inhibiting the next combustion for this cylinder of the engine, and when the first prediction of the engine speed is between the predetermined lower threshold and a predetermined upper threshold, and the engine reaches a second measurement predetermined angular position which is subsequent to the first measurement position, activating the prediction means again in order to obtain a second prediction of the engine speed at the next top dead center.

A method for increasing a resolution of a magnetic sensor for an internal combustion engine of a motor vehicle. The sensor delivers an electrical synchronization signal having successive, spaced-apart crenels, one of the rising or falling edges of which corresponds to a respective angle of rotation of the element of the engine. A synchronization voltage range is interposed between an upper voltage modulation range above and a lower voltage modulation range below the upper and lower voltage of the synchronization range, respectively, the electrical signal in each of the lower and upper modulation ranges being modulated so as to include additional crenels, which are supplementary to the crenels of the synchronization signal, corresponding to periodic clock crenels with a period dependent on engine speed, an angle of rotation being identified by one of the rising or falling edges of each additional crenel.

An internal combustion engine (ICE) includes a crankshaft, a cylinder head defining in part a variable combustion chamber of the ICE, a direct fuel injector mounted on the cylinder head, a power source, an electric turning machine (ETM) rotating the crankshaft, an absolute position sensor providing an indication of an angular position of a rotor of the ETM, and an engine control unit (ECU) operatively connected to the absolute position sensor. The ECU controls a delivery of electric power from the power source to the ETM based on the angular position of the rotor of the ETM and causes the direct fuel injector to inject fuel directly in the combustion chamber at a time selected based on the angular position reached by the rotor of the ETM.

A method for controlling delivery of electric power between a power source and an electric turning machine (ETM) comprises applying a start signal to a start-up power electronic switch to cause turning on of the start-up power electronic switch and to allow delivery of electric power from the power source to the ETM via the start-up power electronic switch. A recharge signal is applied to a run-time power electronic switch to cause turning on of the run-time power electronic switch for delivery of electric power from the ETM to the power source via the run-time power electronic switch. A circuit comprises a discharging circuit including the start-up power electronic switch for delivering the electric power when the start-up power electronic switch is turned on. A charging circuit includes the run-time power electronic switch for delivering the electric power when the run-time power electronic switch is turned on.

Provided is a stroke determination device which detects a secondary output from an ignition coil without using a high breakdown voltage element, and is capable of accurately establishing the stroke being carried out during an ignition operation of a four-stroke engine from the waveform of the detected secondary output. In the present invention, a secondary coil of an ignition coil is constituted from a first coil portion, and a second coil portion wound so as to have fewer windings than does the first coil portion and connected in series to the first coil portion. A tap is drawn out from a boundary part between both coil portions, the voltage at both ends of the second coil portion or the current flowing through the second coil portion is detected through the tap, and a parameter to be used in stroke determination is detected from the waveform of the detected voltage or current.