An apparatus includes a valve and an actuator. The valve has a portion movably disposed within a valve pocket defined by a cylinder head of an engine. The valve is configured to move relative to the cylinder head a distance between a closed position and an opened position. The portion of the valve defines a flow opening that is in fluid communication with a cylinder of an engine when the valve is in the opened position. The actuator is configured to selectively vary the distance between the closed position and the opened position.

A rocker arm mechanism capable of selectively adjusting a timing of opening or closing an intake or an exhaust valve of a plurality of exhaust valves by shifting according to a crankshaft angle and by gradually changing a maximum valve opening, or electively, allows for engine braking by decompression by opening the plurality of exhaust valves before a compression stroke in a plurality of internal combustion engines.

An adjusting unit of an internal combustion engine is provided, comprising an electric motor and a transmission interacting therewith, an adjusting shaft of the transmission being coupled to the rotor of the electric motor. A drive shafts of the transmission is coupled to the shaft which is to be adjusted. For controlling the electric motor, a sensorless control unit is provided outside of a housing of the electric motor which encloses the stator of the electric motor.

A system and method of controlling an angular position of a camshaft relative to an angular position of a crankshaft includes detecting rotational movement of an electric motor output shaft controlling a camshaft phaser; detecting rotational movement of the crankshaft; determining the relative difference between the rotational movement of the electric motor output shaft and the rotational movement of the crankshaft; and determining whether the angular position of the camshaft relative to the angular position of the crankshaft is advancing, retarding, or remaining constant.

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.

The present invention relates to a method for controlling an internal combustion engine arrangement (100). The internal combustion engine arrangement (100) comprises a combustion cylinder (102) and an inlet valve (106) arranged to be positioned in a closed position at a distance before a piston (104) reaches a bottom dead center during normal operation. The inlet valve is further controllable to be arranged in the open position until the piston reaches the bottom dead center if a required volumetric efficiency of the combustion cylinder is higher than a volumetric efficiency during normal operation.

A toothed wheel forming a target for a camshaft position sensor includes a circular body provided with two opposite main faces and is provided on its circumference with teeth. The series of teeth includes eight teeth, each tooth having, for a given first direction of rotation of the wheel, a rising edge and a falling edge and two neighboring teeth being separated by a recessed part. The edges of a first type, rising or falling, are evenly distributed at the periphery of the toothed wheel. The angular length of the recessed parts is greater than or equal to arctan(Llow/R)CAM, where R is the radius and Llow is the minimum distance between two teeth to detect a low level, except for one recessed part, and the angular length of a tooth is greater than arctan(Lhigh/R)CAM, except for one tooth, where Lhigh is the minimum length of a tooth allowing detection.

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.

The present invention relates to a method for controlling an internal combustion engine arrangement (100). The internal combustion engine arrangement (100) comprises a combustion cylinder (102) and an inlet valve (106) arranged to be positioned in a closed position at a distance before a piston (104) reaches a bottom dead center during normal operation. The inlet valve is further controllable to be arranged in the open position until the piston reaches the bottom dead center if a required volumetric efficiency of the combustion cylinder is higher than a volumetric efficiency during normal operation.

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.