US 11,788,442 B2
Engine valve actuation
Roger Stone, Coventry (GB); Richard Tyrrell, Coventry (GB); and David Kelly, Coventry (GB)
Assigned to JAGUAR LAND ROVER LIMITED, Coventry (GB)
Filed by JAGUAR LAND ROVER LIMITED, Warwickshire (GB)
Filed on Aug. 12, 2022, as Appl. No. 17/886,699.
Application 17/886,699 is a continuation of application No. 17/416,020, granted, now 11,454,143, previously published as PCT/EP2018/085887, filed on Dec. 19, 2018.
Prior Publication US 2022/0389845 A1, Dec. 8, 2022
Int. Cl. F01L 9/40 (2021.01); F01L 9/22 (2021.01); F01L 1/30 (2006.01); F02D 13/02 (2006.01)
CPC F01L 9/40 (2021.01) [F01L 9/22 (2021.01); F01L 1/30 (2013.01); F02D 2013/0296 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electromagnetic valve actuator for at least one valve of an internal combustion engine, the electromagnetic valve actuator comprising:
a rotor;
a stator configured to rotate the rotor;
an output means arranged on the rotor, the output means configured to actuate the at least one valve based on rotation of the rotor; and
a mechanical energy storage means arranged to alternately store and release energy based on the rotation of the rotor so as to assist the stator in rotating the rotor when the energy is released,
wherein the mechanical energy storage means includes a cam with an asymmetric profile.