Eaton Corporation

Don J Krzysik

Keith Hampton

Donald R Haefner

Robert S Mueller

Bryce A Buuck

Glen R Lilley

A dual event valve control system for an internal combustion engine. The system includes an inner rocker arm in engagement with a valve and with a first cam, an outer rocker arm in engagement with a second cam, and a latch member which is insertable between the rocker arms, whereupon when the rocker arms do not engage the latch member, the rocker arms are free to pivot independently of one another and the valve is actuated by the first rocker arm in accordance with the lift profile of the first cam, and when the rocker arms are engaged by the latch member, the rocker arms rotate in unison and the valve is actuated by the second rocker arm in accordance with the lift profile of the second cam. A stop acting between the inner and outer rocker arms limits relative pivoting movement between the rocker arms and is effective to provide clearance between the base circle portion of its second cam and the outer rocker arm.

Dual event valve control system

A motor driven actuator having a mechanical stop radially protruding from the motor output shaft which contacts the output mechanism upon reaching an extreme of travel thereby stopping the rotation of the motor by imparting a tangential stopping force thereby stopping the movement of the output mechanism while minimizing forces generated in the actuator drive mechanism.

Travel limit stop for a motor driven actuator

A device (10) for varying the angular phase relation between a camshaft (12) and a crankshaft (unshown) in response to axial displacement of an advancing plate (20) drivingly connected to a support (16) via straight splines (16f) and a drive (18) via angled splines (18d). The support (16) is fixed to an end (12a) of the camshaft (12) for rotation therewith. The drive (18) is journaled on the support (16) and is driven by and in phase with the crankshaft. The advancing plate (20) is also threadably connected to a drum (36) via threads (20c,36a) and the axial displacement is effected by relative rotation between the plate (20) and the drum (36). A clockspring (24) reacting between the support (16) and drum (36) tends to rotate the drum (36) faster than the plate (20) for positioning the plate (20) in a first limit position. The plate ( 20) is selectively movable from the first position toward a second limit position in response to selective application of a frictional retarding force to the drum by an actuation assembly (30). Intermediate plate positions (and of course intermediate phase relations of the camshaft (12) and crankshaft) are provided by balancing the spring and retarding forces. Further, the device contains an internal supply of lubricating oil sealed against leakage by covers (26,28) disposed at the axially facing ends of the device.

Growing community of inventors

Wixom, MI, United States of America

Don J Krzysik