Abstract: A valve motion measurement assembly is provided for a cylinder valve of an internal combustion engine provided with a valve stem and with a valve head. The valve motion measurement assembly includes a valve position sensor, a supporting bracket provided with at least one sensor seat for the valve position sensor, and a sensor target element configured to be coupled to the valve stem at a distance from the valve head to follow the motion of the cylinder valve. The valve position sensor interacts with the sensor target element for determining the position of the cylinder valve.

Abstract: A roller tappet for a fuel unit pump of an internal combustion engine is provided with a roller tappet bore for inserting the roller tappet within the internal combustion engine. The roller tappet includes a roller tappet body having a body longitudinal axis for connecting the roller tappet to a reciprocating element of the fuel unit pump. A cam roller contacts a cam lobe of a rotatable shaft of the internal combustion engine. The cam roller is rotatably mounted to the roller tappet body around a cam roller rotation axis. The external surface of the roller tappet body is configured to allow tilting of the roller tappet within the roller tappet bore for aligning the roller tappet with respect to the cam lobe of the rotatable shaft.

Abstract: A pump assembly and a propulsion system that utilizes the pump assembly includes a casing defining an opening. The pump assembly also includes a first member at least partially disposed in the opening. The first member is movable linearly relative to the opening. The pump assembly further includes a biasing member disposed in the opening. The biasing member is movable independently of the first member. The first member is movable in a first direction that applies a load to the biasing member which creates a torque on the biasing member. The pump assembly also includes a second member that separates the first member and the biasing member such that the torque on the biasing member is transferred to the second member without transferring the torque to the first member when the first member applies the load to the biasing member.

Abstract: A pump assembly and a propulsion system that utilizes the pump assembly includes a casing defining an opening. The pump assembly also includes a first member at least partially disposed in the opening. The first member is movable linearly relative to the opening. The pump assembly further includes a biasing member disposed in the opening. The biasing member is movable independently of the first member. The first member is movable in a first direction that applies a load to the biasing member which creates a torque on the biasing member. The pump assembly also includes a second member that separates the first member and the biasing member such that the torque on the biasing member is transferred to the second member without transferring the torque to the first member when the first member applies the load to the biasing member.

Abstract: A roller tappet for a fuel unit pump of an internal combustion engine is provided with a roller tappet bore for inserting the roller tappet within the internal combustion engine. The roller tappet includes a roller tappet body having a body longitudinal axis for connecting the roller tappet to a reciprocating element of the fuel unit pump. A cam roller contacts a cam lobe of a rotatable shaft of the internal combustion engine. The cam roller is rotatably mounted to the roller tappet body around a cam roller rotation axis. The external surface of the roller tappet body is configured to allow tilting of the roller tappet within the roller tappet bore for aligning the roller tappet with respect to the cam lobe of the rotatable shaft.

Abstract: A valve motion measurement assembly is provided for a cylinder valve of an internal combustion engine provided with a valve stem and with a valve head. The valve motion measurement assembly includes a valve position sensor, a supporting bracket provided with at least one sensor seat for the valve position sensor, and a sensor target element configured to be coupled to the valve stem at a distance from the valve head to follow the motion of the cylinder valve. The valve position sensor interacts with the sensor target element for determining the position of the cylinder valve.

Abstract: A turbocharger for an internal combustion engine, comprising a bearing housing, a rotating shaft coupled to the bearing housing, a compressor wheel mounted at one end of the rotating shaft, a compressor housing accommodating the compressor wheel and provided with an inlet and an outlet for an air stream, a turbine wheel mounted at the opposite end of the rotating shaft, and a turbine housing accommodating the turbine wheel and provided with an inlet and an outlet for an exhaust gas stream, wherein the bearing housing comprises a fastening flange suitable to be fixed to a component of the internal combustion engine, wherein the turbine housing is provided with a connecting pipe for fluidly connecting the turbine housing inlet with an exhaust manifold of the internal combustion engine, and wherein the connecting pipe includes means, for compensating axial thermal deformations thereof.

Abstract: A cylinder head is provided for an internal combustion engine, defining a plurality of exhaust ports and an exhaust outlet and an exhaust manifold internally defined by the cylinder head. The exhaust manifold includes, but is not limited to, a collector volume in communication with the exhaust ports, through a plurality of exhaust runners, and with the exhaust outlet. A turbocharger housing is defined by the cylinder head and includes, but is not limited to a turbine volume internally defined by the cylinder head in fluid communication with the exhaust outlet of the exhaust manifold.

Abstract: A turbocharger for an internal combustion engine, comprising a bearing housing, a rotating shaft coupled to the bearing housing, a compressor wheel mounted at one end of the rotating shaft, a compressor housing accommodating the compressor wheel and provided with an inlet and an outlet for an air stream, a turbine wheel mounted at the opposite end of the rotating shaft, and a turbine housing accommodating the turbine wheel and provided with an inlet and an outlet for an exhaust gas stream, wherein the bearing housing comprises a fastening flange suitable to be fixed to a component of the internal combustion engine, wherein the turbine housing is provided with a connecting pipe for fluidly connecting the turbine housing inlet with an exhaust manifold of the internal combustion engine, and wherein the connecting pipe includes means for compensating axial thermal deformations thereof.