Abstract:
Die Erfindung betrifft eine Ventiltriebvorrichtung mit einer Nockenwelle (50) mit einem axial verschieblich angeordneten Nockenstück (10) mit mindestens zwei Nocken (12, 14), die bei einer Drehung der Nockenwelle (50) phasenverschobene Nockenhübe bereitstellen und verschiedenen Zylindern zugeordnet sind, und einer Schaltkulisse (20) zum axialen Verschieben des Nockenstücks (10), wobei die Schaltkulisse eine erste Kulissenbahn (22) zum axialen Verschieben des Nockenstücks in einer Vorwärtsrichtung (V) und eine zweite Kulissenbahn (24) zum axialen Verschieben des Nockenstücks in einer der Vorwärtsrichtung entgegengerichteten Rückwärtsrichtung (R) aufweist. Die erste Kulissenbahn (22) und die zweite Kulissenbahn (24) sind axial voneinander beabstandet und weisen keinen gemeinsamen Bahnabschnitt auf.
Abstract:
A switching roller finger follower, including: first and second rotatable outer arms; and a locking mechanism including a locking pin with a first outside diameter and first and second ends. The locking mechanism includes first and second locking sleeves: separate from the locking pin; fixedly secured to the first and second ends, respectively; and having second and third outside diameters, respectively, larger than the first outside diameter. The locking pin is displaceable such that: in a locked mode, the first and second locking sleeves contact the first and second outer arms, respectively, to block rotation of the first and second outer arms in a first rotational direction; and in an unlocked mode, the first and second locking sleeves are free of contact with the first and second outer arms, respectively.
Abstract:
A switching roller finger follower, including: first and second rotatable outer arms; and a locking mechanism including a locking pin with a first outside diameter and first and second ends. The locking mechanism includes first and second locking sleeves: separate from the locking pin; fixedly secured to the first and second ends, respectively; and having second and third outside diameters, respectively, larger than the first outside diameter. The locking pin is displaceable such that: in a locked mode, the first and second locking sleeves contact the first and second outer arms, respectively, to block rotation of the first and second outer arms in a first rotational direction; and in an unlocked mode, the first and second locking sleeves are free of contact with the first and second outer arms, respectively.
Abstract:
The present invention relates to a method for reducing turbolag in a turbocharged internal combustion engine comprising an inlet manifold, an exhaust manifold, an exhaust gas recirculation (EGR) valve and a Variable Geometry Turbine (VGT) turbo unit, comprising the steps of : demanding torque for shifting the internal combustion engine from a stationary engine mode to a transient engine mode, closing the EGR valve during said transient engine mode, repositioning guide vanes of the VGT turbo unit from a first position when in said stationary engine mode to a second position when in said transient engine mode, increasing a duration of overlapping of at least one inlet valve and at least one outlet valve provided in a cylinder head of said internal combustion engine from a first duration when in said stationary mode to a second duration when in said transient mode for increasing the amount of air flowing from the inlet manifold to the exhaust manifold and thereby increasing acceleration of a turbine of said VGT turbo unit.
Abstract:
A control system (125) for an engine (105) having a first cylinder (135) and a second cylinder (135) is disclosed having a first engine valve movable to regulate a fluid flow of the first cylinder and a first actuator (202) associated with the first engine valve. The control system also has a second engine valve movable to regulate a fluid flow of the second cylinder and a sensor (272) configured to generate a signal indicative of a pressure within the first cylinder. The control system also has a controller (270) that is in communication with the first actuator and the sensor. The controller is configured to compare the pressure within the first cylinder with a desired pressure and selectively regulate the first actuator to adjust a timing of the first engine valve independently of the timing of the second engine valve based on the comparison.
Abstract:
Transitioning between combustion modes includes an intermediate combustion mode. Transitions are controlled in accordance with a preferred fuel mass and permissible fuel mass ranges corresponding to changing intake airflow.
Abstract:
The device comprises a tappet (1), a lobe (2), which is mounted on a camshaft and which has a contact surface (3), which is suited for touching a contact surface (4) of the tappet (1) and a device for turning the tappet (1) to a position where, as lobe (2) turns, contact surface (3) of lobe (2) and contact surface (4) of tappet (1) touch each other earlier and loosen later that in the original position. The tappet (1) is equipped with roller (5). Use of the roller (5) on the upper surface of the tappet (1) enables creating the contact surface (4) with the tappet (1), which provides the possibility gradually and at wide range to change valve opening and closing timing and duration, by turning the tappet (1) in relation to the movement plane of the lobe. (2)