A method of manufacturing a hollow drive shaft for a vehicle may include swaging one of a first hollow tube and a second hollow tube having a same diameter to reduce an outer diameter thereof and thus allow the swaged hollow tube to be assembled in a remaining hollow tube of the first hollow tube and the second hollow tube, assembling the hollow tube that is reduced in outer diameter in the remaining hollow tube, thereby forming a hollow shaft, and joining first and second stems to both sides of the hollow shaft, respectively.

A method of manufacturing a hollow drive shaft for a vehicle may include swaging one of a first hollow tube and a second hollow tube having a same diameter to reduce an outer diameter thereof and thus allow the swaged hollow tube to be assembled in a remaining hollow tube of the first hollow tube and the second hollow tube, assembling the hollow tube that is reduced in outer diameter in the remaining hollow tube, thereby forming a hollow shaft, and joining first and second stems to both sides of the hollow shaft, respectively.

Connecting rod ultrasonic-assisted splitting machining method and a machining device thereof, relating to the field of machining of a connecting rod. The machining device comprises a rack, a fixing block, a sliding block, a sliding block base, a vertical locking oil cylinder, a wedge-shaped pull rod, an adjusting block body, etc. By means of the method and the device thereof, the range of the material used for splitting the connecting rod is enlarged, the splitting force required during the splitting of the connecting rod, deformation of fracture surfaces, residues generated during the splitting process, out-of-roundness of big end holes of the connecting rod, and other situations are reduced, and the engaging accuracy of the connecting rod and the joint face of a connecting rod cover and the assembly quality of the connecting rod are improved.

Connecting rod ultrasonic-assisted splitting machining method and a machining device thereof, relating to the field of machining of a connecting rod. The machining device comprises a rack, a fixing block, a sliding block, a sliding block base, a vertical locking oil cylinder, a wedge-shaped pull rod, an adjusting block body, etc. By means of the method and the device thereof, the range of the material used for splitting the connecting rod is enlarged, the splitting force required during the splitting of the connecting rod, deformation of fracture surfaces, residues generated during the splitting process, out-of-roundness of big end holes of the connecting rod, and other situations are reduced, and the engaging accuracy of the connecting rod and the joint face of a connecting rod cover and the assembly quality of the connecting rod are improved.

A fluid injector for injecting fluid is disclosed, including a body; a fluid passageway defined in the body and extending from an inlet to an outlet of the fluid injector; a valve seat disposed internally of the body and forming part of the passageway; a valve element that is selectively reciprocated relative to the valve seat to close and open the passageway to fluid flow by seating and unseating the valve element on and from the valve seat, respectively; and an orifice disc disposed in the passageway downstream of the valve seat in a direction of the fluid flow through the fluid injector, the orifice disc including a plurality of dimples and a plurality of orifices defined through the orifice disc, each dimple including at least one orifice located thereon and each dimple having an asymmetrical cross-section.

A mixer for an exhaust system of an internal combustion engine, for mixing a reactant with an exhaust gas flow, includes guide blade portions, fold webs and spacer webs. The guide blade portions are provided as guide blade pairs including a first blade portion connected to a second guide blade portion by at least one of the fold webs and folded at the at least one of the fold webs such that the first blade portion is disposed extending adjacent to and spaced from the second guide blade portion. Each of the guide blade pairs is connected to at least one adjacent guide blade pair by at least one of the spacer webs. The fold webs are disposed centrally and located adjacent to each other in an annular pattern of adjacent fold webs and the spacer webs are disposed peripherally spaced apart from each other about a circumference of the mixer.

A mixer for an exhaust system of an internal combustion engine, for mixing a reactant with an exhaust gas flow, includes guide blade portions, fold webs and spacer webs. The guide blade portions are provided as guide blade pairs including a first blade portion connected to a second guide blade portion by at least one of the fold webs and folded at the at least one of the fold webs such that the first blade portion is disposed extending adjacent to and spaced from the second guide blade portion. Each of the guide blade pairs is connected to at least one adjacent guide blade pair by at least one of the spacer webs. The fold webs are disposed centrally and located adjacent to each other in an annular pattern of adjacent fold webs and the spacer webs are disposed peripherally spaced apart from each other about a circumference of the mixer.

A valve stem seal exhibits superior workability of mounting of a reinforcing ring to a valve stem guide and enables the reinforcing ring to be fixed to the valve stem guide in a stable manner. A reinforcing ring is mounted to a valve stem guide by fitting a cylindrical portion to the valve stem guide from a side opposite to an inward flange portion. The cylindrical portion includes a slit extending linearly in a circumferential direction and a locking protrusion that is provided on a side opposite to the inward flange portion with respect to the slit and that is to be locked by a locking recess formed in the valve stem guide. The locking protrusion is constituted by a curved portion that is gradually recessed radially inward from the side opposite to the inward flange portion with respect to the slit to a position that reaches the slit.

A liner for use with a gas turbine engine includes a first liner portion including a first upstream surface and a first downstream surface. The liner further includes a second liner portion spaced apart from the first liner portion. The second liner portion includes a second upstream surface and a second downstream surface. The second upstream surface faces the first downstream surface. Each of the first liner portion and the second liner portion at least circumferentially and radially extends with respect to a central axis. Each of the first liner portion and the second liner portion includes a substrate made of a metallic material and a wear resistant coating disposed on at least a portion of the substrate. The wear resistant coating is made of a polymeric material. The wear resistant coating at least forms the first downstream surface and the second upstream surface.

A liner for use with a gas turbine engine includes a first liner portion including a first upstream surface and a first downstream surface. The liner further includes a second liner portion spaced apart from the first liner portion. The second liner portion includes a second upstream surface and a second downstream surface. The second upstream surface faces the first downstream surface. Each of the first liner portion and the second liner portion at least circumferentially and radially extends with respect to a central axis. Each of the first liner portion and the second liner portion includes a substrate made of a metallic material and a wear resistant coating disposed on at least a portion of the substrate. The wear resistant coating is made of a polymeric material. The wear resistant coating at least forms the first downstream surface and the second upstream surface.