A cylinder head for an internal combustion engine, wherein the cylinder head (1) comprises at least one first component part (12) and at least one second component part (13) joined to the at least one first component part (12), wherein the at least one first component part (12) is manufactured with the use of at least one of the group consisting of primary shaping, forming and cutting, wherein the at least one second component part (13) is manufactured with the use of an additive manufacturing method.

A replaceable hydraulic lash adjuster and method for assembling such are disclosed. The replaceable hydraulic lash adjuster includes a body, a piston, a check valve and a spring. The body configured to be received in and released from a compartment of a rocker arm. The body including a sidewall surrounding a floor. The floor including a passage that extends between an upper cavity and a lower cavity of the body. The piston disposed in the lower cavity. The piston defining a pocket. A check valve is disposed inside the lower cavity and a spring is disposed inside the pocket. The replacable hydraulic lash adjuster is configured to be slidingly removeable from the rocker arm.

In this device, the nozzles that often used in order to make a linear motion, so they can be helpful in rotating the disc if they are placed at the external ring of disc. In addition, in this case, apart from generating electricity from the discharging fluid of the nozzle by ionization method, the kinetic energy of the discharging fluid can be used for rotating the disc as well.

In this device, the nozzles that often used in order to make a linear motion, so they can be helpful in rotating the disc if they are placed at the external ring of disc. In addition, in this case, apart from generating electricity from the discharging fluid of the nozzle by ionization method, the kinetic energy of the discharging fluid can be used for rotating the disc as well.

A replaceable hydraulic lash adjuster and method for assembling such are disclosed. The replaceable hydraulic lash adjuster includes a body, a piston, a check valve and a spring. The body configured to be received in and released from a compartment of a rocker arm. The body including a sidewall surrounding a floor. The floor including a passage that extends between an upper cavity and a lower cavity of the body. The piston disposed in the lower cavity. The piston defining a pocket. A check valve is disposed inside the lower cavity and a spring is disposed inside the pocket. The replacable hydraulic lash adjuster is configured to be slidingly removeable from the rocker arm.

A valve actuation system is disclosed for use with an internal combustion engine. The valve actuation system may have a rocker shaft, a rocker arm pivotally mounted on the rocker shaft, at least one cam follower and a pushrod connecting the at least one cam follower to the rocker arm. The valve actuation system may also have a plurality of gas exchange valves, and a bridge connecting the rocker arm to the valves. The valve actuation system may further have at least one spring disposed around each of the valves and configured to bias each of the valves toward closed positions, and a rotocoil configured to rotatably connect the at least one spring to each of the valves. The rotocoil may have an internal chamfer at a bridge end with an angle of about 26-28. The at least one spring may have an assembled load of about 750-850 N.

A valve actuation system is disclosed for use with an internal combustion engine. The valve actuation system may have a rocker shaft, a rocker arm pivotally mounted on the rocker shaft, at least one cam follower and a pushrod connecting the at least one cam follower to the rocker arm. The valve actuation system may also have a plurality of gas exchange valves, and a bridge connecting the rocker arm to the valves. The valve actuation system may further have at least one spring disposed around each of the valves and configured to bias each of the valves toward closed positions, and a rotocoil configured to rotatably connect the at least one spring to each of the valves. The rotocoil may have an internal chamfer at a bridge end with an angle of about 26-28. The at least one spring may have an assembled load of about 750-850 N.

A poppet valve has an elongated stem that is configured to extend along a longitudinal axis. The poppet valve further includes a valve body that is disposed laterally with respect to the longitudinal axis and located in a spaced apart relation with an end of the elongated stem. The valve body has a pair of opposing faces disposed co-axial with the longitudinal axis of the elongated stem. The poppet valve also includes at least two arcuately shaped appendages depending downwardly from the end of the elongated stem and extending away from the longitudinal axis of the elongated stem. An end of each appendage is disposed in abutment with an annular region defined on one of the opposing faces of the valve body, a perimeter of the annular region being larger than a perimeter of the elongated stem measured about the longitudinal axis.

A rotary manifold for a rotor assembly of a cohesion-type drive includes a manifold body extending along a drive axis for rotation thereabout, a first ductwork internal the body for fluid communication with a plurality of first chambers of the drive, and a second ductwork internal the body for fluid communication with a plurality of second chambers of the drive. The second ductwork is in fluid isolation of the first ductwork.

A valve bridge for a valve system of an engine includes one or more valves and a valve rotator coupled to the valves. The valve bridge includes one or more end portions, a seat formed at the one or more end portions to receive the one or more valves, and an extension portion that extends outwardly from the one or more end portions. The extension portion defines a cavity configured to accommodate the valve rotator, and guide the valve bridge with the valve rotator during each opening and closing of the one or more valves relative to the engine.