Actuating mechanism for a switchable rocker arm

An actuation system for a switchable valvetrain assembly, the actuation system comprising:

• a linear actuator comprising a selectively extendable actuator pin;
• a rocker arm of the switchable valvetrain assembly, the rocker arm further comprising a switchable latching pin;
• and
• an actuation mechanism comprising:
• an actuator arm comprising a first end and a second end opposite the first end, the second end of the actuator arm comprising a pin contact surface configured to cooperatively engage with the actuator pin;
• a switching arm comprising a first end and a second end opposite the first end;
• and
• a lever axle pivotally coupling the actuator arm and the switching arm at the first end of each of the actuator arm and the switching arm, the lever axle rotatable about a lever axis;
• wherein the actuation mechanism is configured to rotate about the lever axis between a first lever position and a second lever position based on a selective extension of the actuator pin along an axis of linear motion of the actuator pin;
• wherein the second end of the switching arm is configured to selectively switch the switchable latching pin of the rocker arm based on the position of the actuation mechanism;
• and
• wherein, based on the rotation of the actuation mechanism about the lever axis, a plurality of interface positions disposed 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.

A method of selectively switching a latching pin of a rocker arm by a linear actuator mechanism, the method comprising:

• selectively extending an actuator pin of the actuator mechanism between a first actuator pin position and a second actuator pin position along an axis of linear motion, the actuator pin engaging a pin contact surface of an actuation mechanism, the actuation mechanism comprising an actuator arm and a switching arm, the pin contact surface provided at an end of the actuator arm;
• operating, based on selectively extending the actuator pin, the actuator arm to selectively rotate the actuation mechanism about a lever axis between a first lever position and a second lever position;
• and
• operating, based on selectively rotating the actuation mechanism and based on pivotal coupling of the actuator arm and a switching arm by a lever axle of the actuation mechanism, the switching arm to selectively act on the latching pin of the rocker arm,
• wherein, based on the rotation of the actuation mechanism between the first and second lever positions, a plurality of interface positions disposed on the pin contact surface are each configured to cooperatively engage with the actuator pin at an orthogonal angle to the axis of linear motion of the actuator pin.