Cylinder deactivation and engine brake mechanism for type III center pivot valvetrains
AssigneeEaton Intelligent Power Limited
InventorsPritam Gopal Edke, Nikhil Saggam, Nicola Andrisani
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Abstract
A rocker assembly for a type III center pivot valvetrain comprises a rocker arm comprising a cam end, a center pivot bore, and a valve end. The valve end comprises a first actuator bore and a second actuator bore. A cylinder deactivation actuator is in the first actuator bore. An engine brake actuator is in the second actuator bore. The rocker assembly can be part of a valve assembly and can impart an engine braking function, a cylinder deactivation function, and a main lift function to first and second valves. It is also possible to impart an early exhaust valve opening, a main lift function, and a late exhaust valve closing to the engine braking valve.
Claims10
A rocker assembly for a type III center pivot valvetrain, the rocker assembly comprising:
- a rocker arm comprising a cam end, a center pivot bore, and a valve end which includes a first actuator bore and a second actuator bore;
- a cylinder deactivation actuator arranged in the first actuator bore, the cylinder deactivation actuator comprising:
- a hydraulically actuated latch assembly configured to selectively switch between a latched configuration and an unlatched configuration;
- and
- a mechanical lash-setting sleeve distanced from a travel stop defined within the first actuator bore;
- and
- an engine brake actuator arranged in the second actuator bore,
- wherein the hydraulically actuated latch assembly is further configured to selectively travel between the travel stop and the mechanical lash-setting sleeve when the hydraulically actuated latch assembly is in the latched configuration.
Dependencies are inferred from the claim text.