A valve train system that eliminates the inefficiencies of current spring biased systems. The system uses teeter beams that are manipulated by cams that are driven by cam shafts to control and operate the valve system more efficiently and dependably.

A valve train assembly includes at least a number of exhaust valves; at least one camshaft with at least a pair of a primary lift cam and an engine brake lift cam. A number of rocker arms each include a cam follower for following one of the primary lift cam and the engine brake lift cam. One rocker arm includes a cam follower following an engine brake lift cam. The rocker arm is provided with an engine brake capsule. Various biasing assemblies are disclosed that cooperate with one of the rocker arms of which the cam follower follows an engine brake lift cam to accommodate mechanical lash.

A valve train assembly includes at least a number of exhaust valves; at least one camshaft with at least a pair of a primary lift cam and an engine brake lift cam. A number of rocker arms each include a cam follower for following one of the primary lift cam and the engine brake lift cam. One rocker arm includes a cam follower following an engine brake lift cam. The rocker arm is provided with an engine brake capsule. Various biasing assemblies are disclosed that cooperate with one of the rocker arms of which the cam follower follows an engine brake lift cam to accommodate mechanical lash.

A valve assembly selectively varies the timing of the valves in an internal combustion engine cycle by way of a first and second camshaft. Each valve has a shuttle portion and a valve portion. Upper and lower cam followers on the shuttle portion engage with first and second cams on each of the first and second camshafts to move the valve between an open and closed position with reference to a valve seat on an engine block.

A valve assembly selectively varies the timing of the valves in an internal combustion engine cycle by way of a first and second camshaft. Each valve has a shuttle portion and a valve portion. Upper and lower cam followers on the shuttle portion engage with first and second cams on each of the first and second camshafts to move the valve between an open and closed position with reference to a valve seat on an engine block.

An assembly for coupling a valve stem to an actuating member of an actuator in a desmodromic valve actuation mechanism comprises a spherical bearing having two portions each of which defines a respective bearing surface which is complementary to the bearing surface defined by the other portion, at least one of the surfaces being part spherical, one of the portions being arranged to be coupled to the actuating member and the other portion being arranged to be coupled to the valve stem; and a resilient arrangement which exerts a biasing force on one of the bearing portions and provides resilience in the coupling provided by the assembly between the valve stem and actuating member.

An assembly for coupling a valve stem to an actuating member of an actuator in a desmodromic valve actuation mechanism comprises a spherical bearing having two portions each of which defines a respective bearing surface which is complementary to the bearing surface defined by the other portion, at least one of the surfaces being part spherical, one of the portions being arranged to be coupled to the actuating member and the other portion being arranged to be coupled to the valve stem; and a resilient arrangement which exerts a biasing force on one of the bearing portions and provides resilience in the coupling provided by the assembly between the valve stem and actuating member.

There is provided an internal combustion engine, provided with a crankshaft and one or several cylinders provided on the wall thereof with exhaust ports and closed at the top by a cylinder head provided with intake ports; each cylinder accommodating an engine piston connected to the crankshaft and a coaxial auxiliary piston opposite the engine piston, defining an intake chamber and a combustion chamber; said auxiliary piston axially determining on the side of the combustion chamber a housing that communicates with the intake chamber via transfer ports, the housing of which includes a secondary piston which opens and closes the transfer ports in a back-and-forth movement between a rear position and a forward position.

There is provided an internal combustion engine, provided with a crankshaft and one or several cylinders provided on the wall thereof with exhaust ports and closed at the top by a cylinder head provided with intake ports; each cylinder accommodating an engine piston connected to the crankshaft and a coaxial auxiliary piston opposite the engine piston, defining an intake chamber and a combustion chamber; said auxiliary piston axially determining on the side of the combustion chamber a housing that communicates with the intake chamber via transfer ports, the housing of which includes a secondary piston which opens and closes the transfer ports in a back-and-forth movement between a rear position and a forward position.

An improved cylinder head valve assembly design 10 that allows the valve head 16 to open and close at higher RPM's without valve float and no lash adjustments. More power is generated which can equate to better gas mileage. The design also allows for a lighter camshaft 30 enclosed in an oil compartment 62 for better cooling and less overall engine weight.