Engine having variable lift valvetrain

An engine assembly comprising:

• an engine structure;
• a camshaft rotationally supported on the engine structure, defining a longitudinally extending rotational axis and including first and second cam lobes;
• a rocker arm rotationally supported on the engine structure and including:
• a first arm engaged with the first cam lobe and a first engine valve and defining a first longitudinal bore;
• and
• a second arm adjacent the first arm, engaged with the second cam lobe and defining a second longitudinal bore;
• a locking assembly including a first actuation pin extending through a first radial passage in the rocker arm, a second actuation pin extending through a second radial passage in the rocker arm, and a first lock pin located in the first longitudinal bore between the first and second actuation pins;
• and
• an actuation assembly linearly displaceable between first and second actuation positions and including a first actuation member engaged with the first actuation pin and a second actuation member engaged with the second actuation pin, the first and second arms being rotatable relative to one another when the actuation assembly is in the first actuation position and being fixed for rotation with one another by the first lock pin when the actuation assembly is in the second actuation position.

An engine assembly comprising:

• an engine structure;
• a camshaft rotationally supported on the engine structure, defining a longitudinally extending rotational axis and including first, second and third cam lobes;
• an engine structure;
• a camshaft rotationally supported on the engine structure, defining a longitudinally extending rotational axis and including first and second cam lobes;
• a rocker arm rotationally supported on the engine structure and including:
• a first arm engaged with the first cam lobe and a first engine valve and defining a first longitudinal bore;
• a second arm engaged with the second cam lobe and defining a second longitudinal bore;
• and
• a third arm engaged with the third cam lobe and a second engine valve and defining a third longitudinal bore, the second arm located between the first and third arms;
• a locking assembly including a first actuation pin extending through a first radial passage in the rocker arm, a second actuation pin extending through a second radial passage in the rocker arm, a first lock pin located in the first longitudinal bore, a second lock pin located in the second longitudinal bore and a third lock pin located in the third longitudinal bore, the first, second, and third lock pins located between the first and second actuation pins;
• and
• an actuation assembly linearly displaceable between first and second actuation positions and including a first actuation member engaged with the first actuation pin and a second actuation member engaged with the second actuation pin, the first and third arms being rotatable relative to the second arm when the actuation assembly is in the first actuation position and being fixed for rotation with one another by the first lock pin being located in the first and second longitudinal bore and the second lock pin being located in the second and third longitudinal bores when the actuation assembly is in the second actuation position.