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US 2021/0254515 A1Published application
Valvetrain configurations for multilevel dynamic skip fire variable valve lift switching and cylinder deactivation
AssigneeTula Technology, Inc.
InventorElliott A. Ortiz-Soto
Life of this patent
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Abstract
The invention relates generally valve train systems for internal combustion engine. More particularly, valve train configurations enable operation of a cylinder with two distinct, non-zero lift profiles and cylinder deactivation.
Claims20
A valve train system of a cylinder in an internal combustion engine, the cylinder having an intake valve, the intake valve capable of being actuated by a cam lobe attached to a camshaft, the valve train system comprising:
- a rocker arm that is capable of transferring a profile of the cam lobe into motion of the intake valve;
- and
- a lost motion mechanism that when enabled results in the profile of the cam lobe not being transferred into intake valve motion, thereby deactivating the cylinder,
- wherein the cam lobe is one of two distinct non-zero cam lobes that can engage with the rocker arm to cause motion of the intake valve when the lost motion mechanism is disabled thereby activating the cylinder, wherein the cam lobe is a high lift cam lobe or a low lift cam lobe.
1 more element
Dependencies are inferred from the claim text.