US 12,221,911 B1
System and method for determining position of axial cam shifting system
Tyler Blake, Farmington Hills, MI (US); David R Pedro, Tecumseh (CA); Joseph Falcon, Saline, MI (US); Kurt E Roguse, Lake Orion, MI (US); Bindal Patel, Canton, MI (US); Gary Michael Chad Starnes, Lake Orion, MI (US); and Nicholas Firsich, Clarkston, MI (US)
Assigned to FCA US LLC, Auburn Hills, MI (US)
Filed by FCA US LLC, Auburn Hills, MI (US)
Filed on Jan. 25, 2024, as Appl. No. 18/422,338.
Int. Cl. F01L 31/14 (2006.01); F01L 1/18 (2006.01); F01L 1/047 (2006.01)
CPC F01L 31/14 (2013.01) [F01L 1/18 (2013.01); F01L 2001/0473 (2013.01); F01L 2201/00 (2013.01); F01L 2820/041 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An axial cam shifting system configured to selectively open and close engine valves associated with a valvetrain assembly, the axial cam shifting system comprising:
an axial cam shifting assembly comprising:
a camshaft;
a first cam assembly received on the camshaft and having two distinct cam profiles including a first cam profile, and a second cam profile;
an actuator having a first pin and a second pin;
a carriage arranged on the camshaft and defining a track that selectively receives the first pin and the second pin, wherein the axial cam shifting assembly is movable between a first position, and a second position corresponding to alignment of the respective two distinct cam profiles; and
a position sensor that communicates a signal indicative of a position of the carriage; and
a controller configured to:
receive the signal over a predetermined time representative of a crankshaft angle;
determine, based on the signal, whether an edge of the track in the carriage has been detected;
determine whether the edge is a rising edge; and
determine whether the carriage is in one of the first position or the second position based on determining whether the edge is a rising edge.