Eaton Intelligent Power Limited

Michele Angelo Cecchi

Marco Ravoni

Nicola Andrisani

Maria Letizia Ciardullo

Mirko Guaschino

Gennaro Buonocore

Andrei Dan Radulescu

James Roy Sheren

Massimo D'Amore

Ramy Rezkalla

Massimo D'amore

Raffaele DiMaro

Daniel Nelson

Fabrizio Dallacqua

A latch assembly can comprise a main latch pin assembly comprising a first diameter on a first main pin face, and a secondary latch piston comprising a second diameter on a secondary piston face. The secondary latch piston can be configured to selectively act on the main latching pin assembly. The main latch pin assembly can be biased to oppose the secondary latch piston. The first diameter can be greater than the second diameter. A rocker arm assembly can comprise the latch assembly. A primary arm can be configured to receive the main latch pin assembly. A secondary arm can be configured to receive the secondary latch piston.

Latching pin assembly and deactivating rocker arm assembly

Several devices are disclosed that can be usable together or used in other valvetrains. Disclosed herein are a rocker arm assembly, compliance capsules for a switchable capsule of the rocker arm, actuators, and support structures for the actuators. The alternative compliance capsules can be electromechanically actuated by the alternative actuators, which are hung over the rocker shaft by the support structure. A cam actuator can be in addition to an overhead cam rail and in addition to the rocker shaft. The cam actuator can be configured with a compliance capsule so that the switching of the switchable capsule is mechanically linked and less reliant on precise electrical signal timing.

Rocker arm assembly, compliance capsules, actuators, and support structures

A latch assembly () can comprise a main latch pin assembly () comprising a first diameter (D) on a first main pin face (), and a secondary latch piston () comprising a second diameter (D) on a secondary piston face (). The secondary latch piston can be configured to selectively act on the main latching pin assembly. The main latch pin assembly can be biased to oppose the secondary latch piston. The first diameter can be greater than the second diameter. A rocker arm assembly () can comprise the latch assembly. A primary arm () can be configured to receive the main latch pin assembly. A secondary arm () can be configured to receive the secondary latch piston.

A castellation assembly comprises a lost motion spring assembly, an upper castellation piece, and a lower castellation piece. A spring hat comprises a crown, a pin hole through the crown, and a brim. A lost motion spring is seated against the spring hat. Upper castellation piece comprises a tubular body, an upper inner rim adjoining the brim, and upper castellation teeth. Lower castellation piece comprises a spring post extending up from a castellation body, the spring post passing through the lost motion spring, and through the pin hole. Lower castellation teeth extend from the castellation body. The lost motion spring is biased against the castellation body to lift the upper inner rim by the brim. A lash screw can house the spring post so that the spring post terminates inside the lash screw. A rocker arm is an example of a castellation assembly installation.

Castellation assembly, lash capsule, and rocker arm

An actuation transmission apparatus for actuating a component of a switchable valve train device of an internal combustion engine includes: a shaft rotatable by an actuation source; a contacting element for contacting the component of the switchable valve train device; and a biasing device for biasing the contacting element rotationally with respect to the shaft; wherein, in use, the biasing device becomes biased by the shaft when the actuation source rotates the shaft when the actuation source attempts to actuate the component of the switchable valve train device, via the contacting element, when the component of the switchable valve train device is not able to be actuated, whereby the biasing device is configured to cause the contacting element to actuate the component of the switchable valve train device when the component of the switchable valve train device becomes actuatable again.

Actuation apparatus

An actuation apparatus for actuating a switchable valve train component of an internal combustion engine includes: a lever for contacting an actuation source and contacting the switchable valve train component; and a biasing unit. The biasing unit contacts the lever. In use, the biasing unit becomes biased by the lever when the actuation source moves the lever when the actuation source attempts to actuate the switchable valve train component, via the lever, when the switchable valve train component is in an un-activatable state. The biasing unit causes the lever to activate the switchable valve train component when the switchable valve train component is in an activatable state again.

Growing community of inventors

Turin, Italy

Michele Angelo Cecchi