Abstract:
A light-weight, high-strength compressor component having at least one fluid delivery feature that is formed via additive manufacturing is provided. The component may have at least one interior region comprising a lattice structure that comprises a plurality of repeating cells. A solid surface is disposed over the lattice structure. The interior region comprising the lattice structure has at least one fluid delivery feature for permitting fluid flow through the body portion of the light-weight, high-strength compressor component. The fluid delivery feature may be a flow channel, a fluid delivery port, a porous fluid delivery feature, or the like that serves to transfer fluids through the component, such as refrigerant and/or lubricant oils. Methods of making such compressor components via additive manufacturing processes are also provided.
Abstract:
In a spark ignition engine, a thermal insulation thin layer is formed over a wall surface, facing an inside of a combustion chamber, of a base material forming the combustion chamber, and for a thermal conductivity λ [W/(m·K)], a thermal diffusivity κ [mm2/s], and a thickness L [μm] of the thermal insulation thin layer, L≧16.7×λ and L≦207.4×(κ)0.5 are satisfied. With such a configuration, a heat loss Q_total escaping from gas in a cylinder to the wall of the combustion chamber over all strokes can be reduced, and the thermal efficiency can be improved without inducing degradation of knocking due to an increase in an amount of heating Q_intake of the gas in the cylinder during an intake stroke.
Abstract:
Although modern diesel fuel formulations are intended to reduce emissions of diesel engines, at least some of those modern fuels tend to have relatively low lubricity levels. The control valve assemblies described herein help to minimize any increased wear that would otherwise result from the use of such low lubricity fuels by providing a valve element, a valve guide, and an insert. The valve element is received within the valve guide and is moveable between an open position and a closed position. The insert forms a first sealed interface and a second sealed interface with the valve element and the valve guide. When the valve element is in the closed position, both of the first sealed interface and the second sealed interface are engaged. When the valve element is in the open position, only one of the first sealed interface and the second sealed interface is engaged.
Abstract:
A method of producing a precision centrifugal casting includes: a) providing a centrifugal casting device having a rotor rotatable around an axis, at least one crucible accommodated in the rotor, and at least one mold associated with the crucible and disposed at a first radial distance from the axis, b) creating a metal melt within the crucible, c) rotating the rotor thereby forcing the melt using centrifugal forces from the crucible into the mold, d) exerting a pressure on the melt forced into the mold until the temperature of the solidifying melt has reached a predetermined cooling-temperature in a range of 1300° to 800° C., wherein the pressure corresponds to the centrifugal force acting on the melt just when the mold is completely filled, times a factor of 1.0 to 5.0, and e) relieving the pressure when the temperature of the solidifying melt is lower than the predetermined cooling-temperature.
Abstract:
A sliding device 1 includes a swash plate 3 rotated in association with a rotating shaft 2 and semispherical shoes 4 sliding on the swash plate 3. The semispherical shoes 4 are formed of a ferrous material and the swash plate 3 is manufactured using high-strength brass as a material.On a sliding surface 4A of the shoe 4, a large number of minute annular expandingly projecting parts 7′ are formed by laser hardening and a lubricating oil passage 10′ consisting of a reticular concave part is also formed.Thereby, a sliding device 1 having excellent seizure resistance as compared with conventional sliding devices can be provided.
Abstract:
A hot-forged TiAl-based alloy having excellent oxidation resistance and high strength at high temperatures, and a process for producing such an alloy. A TiAl-based alloy comprising Al: (40+a) atomic % and Nb: b atomic %, with the remainder being Ti and unavoidable impurities, wherein a and b satisfy formulas (1) and (2) below. 0≦a≦2 (1) 3+a≦b≦7+a (2) Also, a TiAl-based alloy comprising Al: (40+a) atomic % and Nb: b atomic %, and further comprising one or more elements selected from the group consisting of V: c atomic %, Cr: d atomic % and Mo: e atomic %, with the remainder being Ti and unavoidable impurities, wherein a to e satisfy formulas (3) to (9) shown below. 0≦a≦2 (3) 3+a≦b+1.0c+1.8d+3.8e≦7+a (4) b≧2 (5) c≧0 (6) d≧0 (7) e≧0 (8) c+d+e>0 (9)
Abstract:
Disclosed is a MEMS device which comprises at least one shape memory material such as a shape memory alloy (SMA) layer and at least one stressed material layer. Examples of such MEMS devices include an actuator, a micropump, a microvalve, or a non-destructive fuse-type connection probe. The device exhibits a variety of improved properties, for example, large deformation ability and high energy density. Also provided is a method of easily fabricating the MEMS device in the form of a cantilever-type or diaphragm-type structure.
Abstract:
A compressor used in a refrigerating cycle is provided as a miniaturized and lightweight unit at low production cost by selecting an optimal material to constitute components or by forming the housing in a specific shape so as to allow the components to have smaller wall thicknesses while assuring sufficient strength. A tough material achieving a tensile strength greater than 800 N/mm2 is used when forming at least one of the components constituting the housing and the internal mechanisms. In addition, over the area of the housing where the bottom surface and the inner circumferential surface connect with each other, the bottom surface forms an R-shaped portion and the inner circumferential surface forms a sloping portion or an R-shaped portion.
Abstract translation:在制冷循环中使用的压缩机通过选择构成部件的最佳材料或通过将壳体形成为特定形状而以低生产成本提供为小型轻型单元,以允许部件具有更小的壁厚,同时确保足够的 强度。 当形成构成外壳的部件和内部机构中的至少一个时,使用达到大于800N / mm 2的拉伸强度的韧性材料。 此外,在底面和内周面彼此连接的壳体的区域中,底面形成R形部分,并且内周面形成倾斜部分或R形部分。
Abstract:
Disclosed is a MEMS device which comprises at least one shape memory material such as a shape memory alloy (SMA) layer and at least one stressed material layer. Examples of such MEMS devices include an actuator, a micropump, a microvalve, or a non-destructive fuse-type connection probe. The device exhibits a variety of improved properties, for example, large deformation ability and high energy density. Also provided is a method of easily fabricating the MEMS device in the form of a cantilever-type or diaphragm-type structure.
Abstract:
A compressor includes a swash plate, and a shoe connected to an outer periphery of the swash plate. A surface of the swash plate slides upon a flat surface of the shoe. A sliding film is applied to the surface of the swash plate. The sliding film is formed of binder resin which contains a solid lubricant and titanium oxide powder. This allows the surface of the swash plate and the flat surface of the shoe to smoothly slide upon each other.