Caterpillar Inc.

Mike Dean Roley

Kevin Lloyd Dea

Quinton Marcus Burcar

Quinton Burcar

Paul Jon Schweiger

Ram Prasanth Anjaneyulu

A spacer for an engine is disclosed. The spacer comprises a hollow body having an inner surface, a pathway formed along a perimeter on the inner surface, an adapter disposed on the pathway, and a slot formed through the hollow body on the pathway.

Valvetrain spacer

An engine valve actuation system includes engine braking rocker arms each having a hydraulically actuated switch, and an electrohydraulic control system including an actuation fluid supply, an electrically actuated valve adjustable to vary a pressure of actuation fluid supplied from the actuation fluid supply to the hydraulically actuated switches, and an engine braking control unit. The engine braking control unit is structured to command adjusting the electrically actuated valve to adjust the hydraulically actuated switch in each of the engine braking rocker arms at a switching window timing that is varied from engine braking cycle to engine braking cycle to distribute hard handoffs among the engine braking rocker arms.

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Washington, IL, United States of America

Mike Dean Roley