Abstract:
The invention relates to a method for calibration of a positional sensor on a rotational actuator device for control of a gas exchange valve in an internal combustion engine. The rotational actuator device comprises a controlled electric motor with an operating element for operating the gas exchange valve, two energy storage means acting in opposing drive directions on the gas exchange valve, a control and regulation device, controlling the electric motor with regard to the rotor angle thereof relative to a stored set path, and a positional sensor for determining the rotor position. According to the invention, at least one status parameter for the electric motor is determined, the at least one status parameter compared with a reference parameter and, on a difference between the parameters for comparison, the stored set path and/or the recorded positional sensor signal are altered depending on the status parameter.
Abstract:
Dispositif pour moteurs à combustion interne en particulier ceux d'automobiles, qui permet de faire varier la durée d'ouverture et la levée des soupapes de distribution. La variation résulte de l'utilisation de tout ou partie du profil de la came alternative (9) dont le mouvement autour de l'axe (14) provient des cames menantes en rotation (10), (11) par le contact des galets (12), et est transmis au galet (8) qui actionne avec son axe (13) le linguet (3) de la soupape (6) rappelée par le ressort (7). Le réglage s'effectue en positionnant le galet (8) au moyen des bras de support (15) de l'axe (13), rendus solidaires de l'arbre de commande (14) par des clavettes "vélo" (16).
Abstract:
In a valve drive train device for an internal combustion engine of motor vehicle, wherein at least one axially movably mounted cam element including at least one cam set with at least two cam parts and a shifting gate with at least two gate track for converting a rotary movement of the cam element into an axial shifting motion, at least one of the cam parts and the adjacent gate track are disposed in an at least partially axially overlapping relationship for reducing thereby the axial length and the mass of the cam element or permitting the use of a larger, highly durable, actuating mechanism.
Abstract:
A variable valve apparatus for an internal combustion engine includes a control shaft, a camshaft having first and second camshaft members rotatable relative to each other, a rotary cam rotating together with the second camshaft member for opening and closing of an exhaust valve, an eccentric drive cam rotating together with the first camshaft member, a rocker arm caused to swing with rotation of the eccentric drive cam, a swing cam caused to swing by the rocker arm for opening and closing of an intake valve, a control cam formed on the control shaft to change an operating position of the rocker arm according to a rotational phase of the control shaft and vary the amount of swinging movement of the swing cam, a phase control mechanism adapted to control a relative rotational phase of the first and second camshaft members and an actuator for rotating the control shaft.