A valve open-close timing control device includes a driving rotator, a driven rotator, a phase adjusting mechanism, a sensor unit, a storage configured to store the plurality of divided regions consecutively provided, as a plurality of divided length information pieces corresponding to divided lengths of the divided regions, and an actual phase acquisition unit configured to start acquisition of the crank angle signal and the cam angle signal along with start of actuation control of actuating the internal combustion engine, specify one of the divided regions by referring to the divided length information pieces stored in the storage in accordance with the crank angle signal at timing set in accordance with the cam angle signal, and acquire the relative rotation phase as an actual phase in accordance with the crank angle signal corresponding to the boundary of the divided region thus specified and the reference crank angle signal.

An internal combustion engine comprises a crankshaft, at least one camshaft adjustable electromechanically by an actuating gearing, an engine control unit, and a camshaft control unit for controlling an actuating motor which operates the actuating gearing. The engine control unit is linked to a device for detecting the angular position of the crankshaft, and the camshaft control unit is linked to the engine control unit. A device for detecting a reference position of the camshaft and a device for detecting the angular position of the shaft of the actuating motor are provided as sole mechanisms for detecting the angular position of the camshaft. The camshaft control unit is designed to determine the phase angle of the camshaft in relation to the crankshaft on the basis of the information items provided by said devices in combination with the detected angular position of the crankshaft and the transmission ratio of the actuating gearing.

An internal combustion engine comprises a crankshaft, at least one camshaft adjustable electromechanically by an actuating gearing, an engine control unit, and a camshaft control unit for controlling an actuating motor which operates the actuating gearing. The engine control unit is linked to a device for detecting the angular position of the crankshaft, and the camshaft control unit is linked to the engine control unit. A device for detecting a reference position of the camshaft and a device for detecting the angular position of the shaft of the actuating motor are provided as sole mechanisms for detecting the angular position of the camshaft. The camshaft control unit is designed to determine the phase angle of the camshaft in relation to the crankshaft on the basis of the information items provided by said devices in combination with the detected angular position of the crankshaft and the transmission ratio of the actuating gearing.

When an EDU determines that a motor is in a control unstable state where the motor cannot be controlled to a target rotation speed due to a drive voltage output duty value being smaller than a threshold value, the EDU performs a control point shifting operation to shift a control point between a first control point, which is in the control unstable state, and a second control point, which is a control stable state outside the control unstable state. Thus, even when the motor is in a stepping rotation state, it is possible to control the target rotation speed regardless of influence of a cogging torque, and appropriately control the cam phase of the intake camshaft to a target phase when the engine is stopped.

A method for adaptation of a detected camshaft position of a camshaft in an internal combustion engine with: Detection of an ACTUAL gas signal in a gas space that is associated with the camshaft and is associated with a detected camshaft position; Processing of the gas signal to produce an ACTUAL gas criterion; Modeling of multiple simulated gas criteria, each of which is associated with a target camshaft position; Determination of a simulated gas criterion with the least deviation from the ACTUAL gas criterion; Determination of an ACTUAL camshaft position that corresponds to the simulated gas criterion with the least deviation from the ACTUAL gas criterion; Determination of a camshaft position correction value from the difference between the ACTUAL camshaft position determined and the detected camshaft position; Determination of corrected camshaft positions by correcting the detected camshaft positions with the camshaft position correction value.

A method for adjusting a valve lash in an internal combustion engine includes receiving a first signal generated by a sensor secured to the internal combustion engine, the first signal being indicative of a closing of a valve, receiving a second signal indicative of at least one of an engine speed of the internal combustion engine or a position of a camshaft of the internal combustion engine, and automatically determining an adjusted amount of lash associated with the valve based on the received first signal and the received second signal. The method also includes comparing the adjusted amount of lash to at least one predetermined threshold, and providing, in response to determining that the adjusted amount of lash is greater than the at least one predetermined threshold, a valve lash re-adjustment notification.

Various embodiments include a method for detecting deviations occurring in the valve drive of an internal combustion engine comprising: measuring dynamic pressure oscillations of intake air in an air intake tract of respective internal combustion engine during operation; calculating an inlet valve stroke phase difference and/or an outlet valve stroke phase difference based on the measured dynamic pressure oscillation; calculating a valve stroke phase deviation value with respect to a valve stroke phase reference value based on the calculated phase difference; and calculating a first valve drive deviation value based on the valve stroke phase deviation value.

A control device and a control method for variable valve timing mechanism according to the present invention obtains a first measurement of a rotational phase based on a rotational angle of the motor, obtains a second measurement of the rotational phase based on a relative relationship between a rotational angle of the crankshaft and a rotational angle of the camshaft, calibrates the first measurement based on the second measurement, obtains a derivative term proportional to a rate of change in a deviation between the first measurement and a target value, reduces change in derivative term when calibrating the first measurement based on the second measurement, and controls the motor based on a manipulated variable including the derivative term.

Embodiments, systems, and methods for error detection in crankshaft tooth encoding for a crank pulse wheel of a vehicle are provided. In some embodiments, a system for crankshaft tooth encoding includes a read module, a buffer module, an error module, and a position module. The read module identifies a tooth type for N number of teeth in a sliding buffer based on at least one tooth characteristic. The buffer module calculates a buffer value for the sliding buffer corresponding to a tooth represented in the sliding buffer. The error module detects an error associated with a tooth of the crank pulse wheel and calculates a revised buffer value based on the error. The position module determines an angular position of the crank pulse wheel based on the revised buffer value. The position module broadcasts the angular position to one or more vehicle systems of the vehicle.

A motor device includes a motor and a drive device. The motor includes a housing shaped in a bottomed cylinder shape, a stator and a rotor held by the housing, and a sensor magnet attached to a rotor surface on an upper surface of the rotor. The drive device includes a wiring board facing the sensor magnet, an electronic component mounted on the wiring board, a Hall element mounted on the wiring board to face the sensor magnet, and a sealing resin body sealing the wiring board. The sealing resin body includes, as a positioner for positioning the sealing resin body and the housing in a radial direction and in a circumferential direction centering on a motor shaft axis, an inlay wall surface and a fixing part.