US 12,435,650 B2
No lash dual stem I.C.E. valve
Anthony Strussione, Sterling Heights, MI (US)
Filed by Anthony Strussione, Sterling Heights, MI (US)
Filed on Oct. 16, 2023, as Appl. No. 18/487,465.
Claims priority of provisional application 63/488,137, filed on Mar. 2, 2023.
Prior Publication US 2025/0035016 A1, Jan. 30, 2025
Int. Cl. F01L 1/30 (2006.01); F01L 1/053 (2006.01); F01L 1/08 (2006.01); F01L 1/18 (2006.01); F01L 3/08 (2006.01)
CPC F01L 1/30 (2013.01) [F01L 1/0532 (2013.01); F01L 1/08 (2013.01); F01L 1/181 (2013.01); F01L 3/08 (2013.01); F01L 2001/0535 (2013.01); F01L 2001/0537 (2013.01); F01L 2305/02 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A valve train for an internal combustion engine including at least one cylinder and a cylinder head which partially defines the at least one cylinder, the valve train comprising:
a camshaft rotatably mounted to the cylinder head;
at least one cam mounted to the camshaft, the at least one cam including a peripheral groove formed on an axial end face of the at least one cam so as to define an inner cam lobe and an outer cam lobe;
at least one desmodromic valve assembly corresponding to each cylinder, the at least one desmodromic valve assembly extending through the cylinder head so as to directly engage an associated cam of the at least one cam thereby cyclically opening and closing the at least one desmodromic valve assembly against a port of the corresponding cylinder as the camshaft rotates, the at least one desmodromic valve assembly including:
an upper valve stem including an upper end and a lower end, and
a lower valve stem including a lower end defining a valve head, and an upper end defining a shared housing configured to slidably receive the lower end of the upper valve stem,
wherein the associated cam of each desmodromic valve assembly is configured to (i) move the upper valve stem into contact with a lower contact surface of the shared housing when opening the at least one desmodromic valve assembly, and (ii) pull the upper valve stem towards an upper stop of the shared housing so as to seal the valve head against a valve seat of the port when closing the at least one desmodromic valve assembly.