A clip for securing a support element to a drag lever in a valve train of an internal combustion engine. The clip includes a first spring limb including an aperture configured to receive a support element of the valve train, a second spring limb including a concave pocket that includes a first bore configured to transmit lubrication oil from a channel of the support element through the second spring limb, and a bracket member connecting the first and second spring limbs.

A coupling pin anti-rotation arrangement is provided for a switchable roller finger follower within a valve train of an internal combustion engine capable of switching between at least two valve lift modes. The switchable roller finger follower includes an inner lever, an outer lever, a coupling pin, and an anti-rotation clip. The coupling pin, located on one of the inner or outer levers, has a first locking surface, and a first, and preferably, second coupling pin-side anti-rotation flat. The coupling pin moves longitudinally within a coupling pin bore to a first, locked position and a second, unlocked position. The anti-rotation clip has a first and, preferably, second clip-side finger to slidably guide the first and second coupling pin-side anti-rotation flats to ensure alignment of the first locking surface with a second locking surface, located on the other of the inner lever or the outer lever, during all modes of operation.

A coupling pin anti-rotation arrangement is provided for a switchable roller finger follower within a valve train of an internal combustion engine capable of switching between at least two valve lift modes. The switchable roller finger follower includes an inner lever, an outer lever, a coupling pin, and an anti-rotation clip. The coupling pin, located on one of the inner or outer levers, has a first locking surface, and a first, and preferably, second coupling pin-side anti-rotation flat. The coupling pin moves longitudinally within a coupling pin bore to a first, locked position and a second, unlocked position. The anti-rotation clip has a first and, preferably, second clip-side finger to slidably guide the first and second coupling pin-side anti-rotation flats to ensure alignment of the first locking surface with a second locking surface, located on the other of the inner lever or the outer lever, during all modes of operation.

In one embodiment, a retention feature for use in a valvetrain assembly is configured to be attached to a valve bridge and connect the valve bridge with at least one of a rocker arm and a first engine valve of at least two engine valves. The retention feature is further configured to maintain a position of the valve bridge to be aligned with at least two engine valves and resist separation of the valve bridge from at least two engine valves during uncontrolled valve bridge movement. In other embodiments, the valvetrain assembly further includes a mechanical stopper which is disposed on an upper surface of a rocker arm carrier and configured to contact against a lower surface of the rocker arm during uncontrolled valve bridge movement.

An internal combustion engine includes a valvetrain having a rocker arm assembly including a rocker arm on which a latch pin is mounted. An actuator for the latch pin, including an electromagnet, is mounted separately from the rocker arm. Therefore, the rocker arm is able to move independently from the electromagnet. The electromagnet is operative to cause the latch pin to actuate through magnetic flux following a magnetic circuit that passes through the rocker arm. Mounting the electromagnet apart from the rocker arm allows wires powering the electromagnet to be held in relatively static positions. The magnetic circuit is arranged to bring magnetic flux into the latch pin, or a co-acting part, within the volume of the rocker arm. This enables a compact design that is suitable for installation in engines where the available space under the valve cover may be very limited.

A clip for securing a support element to a drag lever in a valve train of an internal combustion engine. The clip includes a first spring limb including an aperture configured to receive a support element of the valve train, a second spring limb including a concave pocket that includes a first bore configured to transmit lubrication oil from a channel of the support element through the second spring limb, and a bracket member connecting the first and second spring limbs.

A device for securing a support element to an actuating lever of a valvetrain of an internal combustion. The actuating lever having a socket dome to accept a socket end of the support element and a roller pocket, with the securing device seated on the socket dome, extending through the roller pocket and splitting into two arms that extend on opposite ends of a circumferential groove below the socket end of the support element.

Several devices are disclosed that can be usable together or used in other valvetrains. Disclosed herein are a rocker arm assembly, compliance capsules for a switchable capsule of the rocker arm, actuators, and support structures for the actuators. The alternative compliance capsules can be electromechanically actuated by the alternative actuators, which are hung over the rocker shaft by the support structure. A cam actuator can be in addition to an overhead cam rail and in addition to the rocker shaft. The cam actuator can be configured with a compliance capsule so that the switching of the switchable capsule is mechanically linked and less reliant on precise electrical signal timing.

A rocker arm assembly can comprise a rocker tube configured to be positioned around a rocker shaft, the rocker tube comprising a retention mechanism. A first rocker arm can be press-fit to the rocker tube. A second rocker arm can be pivotably mounted around the rocker tube and retained on the rocker tube by the retention mechanism. An alternative rocker arm assembly, that can be combined with the first rocker arm assembly, can comprise a first and second rocker am and a plate fixed to the first rocker arm. The plate can comprise an extension extending over the second rocker arm. A lost motion spring can be installed between the second rocker arm and the extension.

An actuation mechanism for selective switching of a valvetrain switching mechanism by a linear actuator mechanism includes an actuator arm having a pin contact surface for engaging an actuator pin of a linear actuator mechanism, a switching arm, and a lever axle pivotally coupling the actuator arm and the switching arm and rotatable about a lever axis, wherein the actuation mechanism is configured to rotate about the lever axis based on a selective extension of the actuator pin, wherein the switching arm is configured to selectively act on the valvetrain switching mechanism based on the rotation of the actuation mechanism; and wherein multiple interface positions on the pin contact surface of the actuator arm are each configured to cooperatively engage with the actuator pin at an orthogonal angle to the axis of linear motion of the actuator pin.