Abstract: The disclosure relates to a camshaft adjusting device with a dry belt, a central valve arranged within a camshaft adjuster, and an actuator acting on the central valve. An oil-tight wet space is formed by the camshaft adjuster and the actuator or a component supporting the actuator, and oil present in the wet space can be evacuated by means of an oil path. A portion of this oil path extends axially through the output element of the camshaft adjuster. This oil path can pass the end-side contact face between the output element and camshaft, opening out into an axial bore of the camshaft which is distanced radially from the axis of rotation of the camshaft adjusting device. The axial bore runs beneath an oil feed connection formed on the outer surface of the camshaft for feeding oil to the central valve.

Abstract: A variable camshaft timing (VCT) phaser assembly and control valve are employed for use in an internal combustion engine. The VCT phaser assembly has a housing and a rotor. The control valve is installed at a location that is remote of the housing and rotor, and apart from a center bolt site of the housing and rotor. The control valve has a valve housing and a spool located in the valve housing. The valve housing has different ports for fluid communication with a source, an advance line, and a retard line. One or more recirculation paths can be established at various times between the valve housing and the spool, depending upon the position of the spool in the valve housing.

Abstract: A variable camshaft timing (VCT) control valve assembly includes: a control valve having one or more lands and a valve cavity; one or more cavity vents in the control valve are configured to communicate fluid between an outer surface of the control valve and the valve cavity; a valve sleeve having a sleeve cavity that receives the control valve and a plurality of apertures, at least one of the apertures is configured to be in fluid communication with an advance fluid chamber of a VCT device and another of the apertures is configured to be in fluid communication with a retard fluid chamber; the control valve slides axially relative to the valve sleeve; and one or more reed valves, attached to an outer surface of the valve sleeve, configured to control the flow of fluid between one of the advance fluid chamber or the retard fluid chamber and the other of the advance fluid chamber or the retard fluid chamber.

Abstract: A hydraulically-actuated variable camshaft timing (VCT) phaser assembly is employed for use in an automotive internal combustion engine. The VCT phaser assembly has a housing, a rotor, a first plate, a second plate, and a control valve. The rotor is situated within the housing, and a plurality of chambers are established between the rotor and housing. The first plate is situated on one side of the housing and rotor, and the second plate is situated on an opposite side of the housing and rotor. One or more air vents reside in one or more of the housing, rotor, first plate, second plate, or control valve. Air separated from hydraulic fluid in the VCT phaser assembly amid use and that makes its way to the air vent(s) can escape the VCT phaser assembly.

Abstract: A camshaft phaser assembly, including: an axis of rotation; a hydraulic camshaft phaser including a stator arranged to receive rotational torque and including a plurality of radially inwardly extending protrusions, a rotor arranged to be non-rotatably connected to a first camshaft and including a plurality of radially outwardly extending protrusions circumferentially interleaved with the plurality of radially inwardly extending protrusions, and a plurality of chambers bounded at least in part by the plurality of radially inwardly extending protrusions and the plurality of radially outwardly extending protrusions; an electric camshaft phaser including an output gear arranged to be non-rotatably connected to a second camshaft located concentrically within the first camshaft and an input non-rotatably connected to the stator; and a connection plate non-rotatably connecting the input and the stator. The rotor and the output gear are rotatable with respect to each other about the axis of rotation.

Abstract: A system and associated methods for controlling valve motion in internal combustion engines provide a pulsing component for energizing a solenoid control valve in pulsatile fashion to cause a transient pressure change in a hydraulic network linking the control valve to a common, paired set of intake and exhaust main event deactivation mechanisms, which may be provided in respective valve bridges. The pressure change results in hydraulic deactivation of main event motion of the exhaust valve while avoiding deactivation of main intake event motion and thereby preserving intake main event valve motion, and supporting use of the intake main event motion for additional braking or other operations. The systems and methods are particularly suited for engine environments that employ cylinder deactivation (CDA) combined with high-power density (HPD) engine braking.

Abstract: A valve drive for an internal combustion engine, including a gas exchange valve; a first mechanically driven drive mechanism; and a second drive mechanism connected to the gas exchange valve to move same. The first and second drive mechanisms connected via a hydraulic coupling device that has a pressure chamber, which can be relieved of pressure via a valve device and is designed to couple the drive mechanisms by hydraulic pressure and to decouple same in a pressure-relieved state. The valve device has two switch valves fluidically connected to the pressure chamber in parallel and via which the pressure chamber is relieved of pressure in the open state of at least one of the switch valves. The valve drive has a controller that actuates the switch valves in a delayed manner to provide a variable valve stroke of the gas exchange valve during a stroke movement.

Abstract: A rocker arm assembly comprises a first arm, a second arm, and a latch assembly. The first arm comprises a main cam interface end, a body comprising a shaft port configured to pivot on a rocker shaft, and a valve end configured to lift and lower when the main cam interface end is acted on by a cam lobe. The second arm is overlaid on the first arm. The second arm comprises a secondary cam interface end, a latch lip end, and a shell connecting the latch lip end and the secondary cam interface end. The shell is configured to pivot relative to the first arm. The latch assembly is mounted to the body. The latch assembly is configured to selectively latch and unlatch the first arm with respect to the second arm.

Abstract: A central valve for a camshaft phaser includes a hollow cylindrical housing, a hydraulic unit, a control piston, a retaining ring, and a washer. The hollow cylindrical housing includes a first radial opening and a groove. The hydraulic unit is disposed in the hollow cylindrical housing and includes a second radial opening and a channel. The control piston is axially moveable in the hydraulic unit to adjust a flow of a hydraulic medium through the first radial opening, the second radial opening, and the channel. The retaining ring is disposed in the groove to retain the hydraulic unit and the control piston in the hollow cylindrical housing. The washer is disposed in the hollow cylindrical housing axially between the hydraulic unit and the retaining ring.

Abstract: A valve actuation system comprises a first motion transfer mechanism operatively connected to a first valve actuation motion source and to the at least one engine valve, a second motion transfer mechanism operatively connected to a second valve actuation motion source; and a selectable coupling mechanism between the first and second motion transfer mechanisms. The coupling mechanism is operable in a first state where first valve actuation motions are conveyed to the at least one engine valve via the first motion transfer mechanism, and a second state where second valve actuation motions are additionally conveyed to the at least one engine valve via the second motion transfer mechanism, the coupling mechanism and the first motion transfer mechanism. During a handoff between the first and second valve actuation motions or vice versa, a difference in valve actuation velocities of the first and second valve actuation motions does not exceed a threshold.

Abstract: An actuating device for a camshaft timing apparatus, having a movable actuating member being supported displaceable along a translational axis, and a force generator for generating a force driving the actuating member along the translational axis, wherein the actuating member is supported rotatable about a rotational axis and wherein the actuating device comprises a torque generator for subjecting the actuating member to a torque about the rotational axis.

Abstract: A roller tappet for a high-pressure fuel pump or for a valve drive of an internal combustion engine is provided. The tappet can be guided in a direction of a longitudinal axis thereof in a housing receptacle and can be driven displaceably by a cam shaft of the internal combustion engine. The tappet includes a tappet body which has a guide cylinder, and a cup-shaped sleeve supported axially and radially on the guide cylinder. The sleeve includes a bearing surface for the pump piston or a valve drive element, and the guide cylinder includes a rotatable roller mounted on support flanks, by means of which roller the roller tappet can be supported on the internal combustion engine camshaft. The sleeve has, at its end region facing away from the bearing surface, a ring-shaped shoulder for radial support and an end ring for axial support on the guide cylinder.

Abstract: The present invention discloses a hydraulic valve mechanism with variable valve opening times and an internal combustion engine, which can effectively implement a single-opening working mode, a two-opening working mode or a multi-opening working mode of a valve in the same working cycle, and can implement a rapid and stable switchover among various working modes according to working condition requirements of the internal combustion engine. A main structure thereof includes a housing, a valve cam including a main protrusion and at least one auxiliary protrusion, a hydraulic rotary valve having a hydraulic switch valve function, a hydraulic drive component, a valve drive component, and the like. Oil passages of the hydraulic drive component, the hydraulic rotary valve, and the valve drive component are in communication.

Abstract: A press-fit member having a cylindrical shape is press-fit into a through hole formed in a vane. An advance-side lock pin and a retard-side lock pin are provided coaxially with each other inside the press-fit member. In the outer circumferential surface of the press-fit member, an advance-side lock pin-release oil passage for applying lock pin-release hydraulic pressure to an advance-side engagement groove and a retard-side lock pin-release oil passage for applying the lock pin-release hydraulic pressure, applied to the advance-side engagement groove, to a retard-side engagement groove are formed.

Abstract: A rocker arm assembly selectively opening first and second engine valves. The assembly includes a rocker arm and a valve bridge operably associated with the rocker arm and including a main body and a lever rotatably coupled to the main body. The main body is configured to engage the first engine valve, and the lever is configured to engage the second engine valve.

Abstract: A switchable cam lever that includes an inner lever and an outer lever is provided for a valve drive of an internal combustion engine. A transverse coupling serves for connecting the outer and inner lever to one another. A cam return spring is braced between the outer and inner lever. The return spring is installed upright, wherein the coupling runs directly above a support surface, and the return spring, as viewed in a lever longitudinal direction is guided in a receptacle in the inner lever. The receptacle is situated directly and entirely in front of the support surface and is formed as a bore, and the return spring bears at one end against a base or annular collar of the bore and acts at an opposite end against a crossbar which connects two arms of the outer lever at the top side.

Abstract: The disclosure relates to a valve train of an internal combustion engine having variable-lift gas exchange valves, comprising: a carrier shaft, a cam piece arranged on the carrier shaft in a rotationally fixed and axially displaceable manner. The cam piece comprises a cam group of axially adjacent cams of different elevations, and an axial slotted link having axially opposite displacement grooves, each having a displacement region and an outlet region. Actuator pins, by engaging with the displacement grooves, displace the cam piece on the carrier shaft. Each displacement groove axially delimits, partially or completely, the outlet region by only one groove wall, and the one groove wall, at which the actuator pin, which is in engagement with the displacement region, positively accelerates the cam piece into a displacement direction. The width of the displacement grooves is smaller in the outlet region than a diameter of the actuator pins.

Abstract: A bearing assembly support comprises a body, the body defining: a thrust surface; an aperture extending through the body; and at least one passageway along which a lubricant can flow away from the thrust surface during use. The thrust surface is suitable for contacting an end of a bearing assembly. The aperture is suitable for receipt of a shaft when supported by the bearing assembly. Each passageway may be defined by a recess on the thrust surface or a cut away section that extends through the body from the thrust surface to an opposite surface of the body. The body may be a housing for receipt of a bearing assembly or an end cap for a housing.

Abstract: An apparatus for actuating one or more latching arrangements of one or more respective rocker arms of a valve train assembly of an internal combustion engine, each rocker arm comprising a first body, a second body for pivotal motion with respect to the first body, and the latching arrangement, the latching arrangement latching and unlatching the first body and the second body, the includes: a shaft rotatable by an actuation source, from a rest orientation, in a first direction, and rotatable by the actuation source, from the rest orientation, in a second direction opposite the first direction; one or more selector cams rotatable by the shaft, each selector cam actuating the latching arrangement of a respective rocker arm so as to latch and/or unlatch the first body and the second body; and a return apparatus for returning the shaft to the rest orientation.

Abstract: A valve drive device has a camshaft which includes a shaft element and a cam piece which can be driven by the shaft element and a first cam effecting a first stroke of a valve and a second cam effecting a second stroke of the valve, and is displaceable in the axial direction of the camshaft relative to the shaft element between a first position, in which the valve can be actuated by the first cam, and a second position in which the valve can be actuated by the second cam, and has an electrically controllable actuator via which the cam piece is displaceable relative to the shaft element in the axial direction as a result of an electrical control of the actuator. The actuator pushes the cam piece alternately back and forth between the positions in the case of successive electrical controls occurring with the same polarity.