US 6,354,254 B1 · Exhaust and intake rocker arm assemblies for modifying valve lift and timing during positive power

Abstract

The present invention is directed to an apparatus for operating at least one intake valve and at least one exhaust valve in an engine cylinder. The apparatus includes an exhaust valve operating assembly for operating the at least one exhaust valve of the engine cylinder, wherein the exhaust valve operating assembly is capable of producing an exhaust gas recirculation event. The apparatus also includes an intake valve operating assembly for operating the at least one intake valve of the engine cylinder. The apparatus further includes an exhaust modifying assembly for modifying the operation of the exhaust valve operating assembly during a predetermined engine operating condition and an intake modifying assembly for modifying the operation of the intake valve operating assembly during a predetermined engine operating condition.

Claims16

Dependent claims

An apparatus for operating at least one engine valve in an engine cylinder, said apparatus comprising:

a rocker arm pivotally mounted on a rocker shaft for operation the at least one engine valve;
a valve train assembly in selective contact with said rocker arm for rotating said rocker arm through a rotation range about the rocker shaft;
means for controlling the range of rocker arm rotation during a predetermined engine operating condition;
and
wherein said valve train assembly is a cam.

2 more elements

Dependencies are inferred from the claim text.

Exhaust and intake rocker arm assemblies for modifying valve lift and timing during positive power

Life of this patent

Exhaust and intake rocker arm assemblies for modifying valve lift and timing during positive power

Life of this patent

Abstract

Claims16