摘要:
A metal gasket assembly for a cylinder head includes a pair of elastic metal substrates each having an outer shape which conforms with the outer shape of the gasket assembly, cylinder openings corresponding to cylinders in the cylinder head, a peripheral region surrounding the cylinder opening, which may be greater in thickness than remaining region of the relevant substrate, and a bead in the peripheral region. The substrates are superimposed with each other with top portions of the beads of the substrates in abutment with each other. A by-plate may be arranged between the substrates and has an increased thickness in its peripheral region which surrounds the cylinder opening and which is in direct abutment with the top portions of the beads in the substrates.
摘要:
Cooperating slidable aluminum alloy members comprising first and second slidable aluminum alloy members that have a slide portion and slide surface, respectively, which slide relative to each other. The slide portion of the first slidable aluminum alloy member is being comprised of a fiber-reinforced aluminum alloy. The reinforcement fiber used for the first slidable aluminum alloy member being a mixture of an alumina fiber and a carbon fiber. The slide surface of the second slidable member is provided with a layer of heat resistant synthetic resin in which are dispersed a solid lubricant and an abrasion resistance improving agent.
摘要:
A fiber-reinforced light alloy member excellent in heat conductivity and sliding properties which contains a mixed fiber uniformly dispersed in a light alloy matrix, the mixed fiber including of a ceramic fiber having a fiber volume fraction of 4 to 60% and a carbon fiber having a fiber volume fraction of 0.5 to 10%, and is produced through a thermal treatment at a heating temperature of 400.degree. to 550.degree. C.
摘要:
A mold is provided which is capable of producing a sound fiber-reinforced composite article utilizing a die-casting process. A cavity in the mold includes a composite article forming area in which a formed product of fiber is located, a molten metal storing area located adjacent the composite article forming area to fill a molten metal into the formed product of fiber, and a molten metal flow slackening area for reducing the turbulent flow of the molten metal from gates to introduce it to the molten metal storing area. Thus, the flow of the molten metal introduced into the molten metal storing area, is brought into a substantially laminar flow state, so that the inclusion of air in the molten metal flow is inhibited. Therefore, the molten metal in the molten metal storing area can be smoothly filled into the formed product of fiber under pressure.
摘要:
A cylinder block made of fiber-reinforced light alloy for an internal combustion engine comprises a cylinder barrel having a fiber-reinforced part formed around a cylinder bore, and a cylinder block outer wall surrounding the cylinder barrel and defining a water jacket between itself and the barrel, wherein a reinforcing deck part is provided to connect between the outer wall and an end portion of the barrel adjacent the cylinder head joining surface, the deck part having a thickness in the direction of barrel axis set to be not less than 7% of a piston stroke.
摘要:
An aluminum alloy slide support member which is disclosed herein as a cylinder block of an internal combustion engine includes a slide portion, such as the cylinder for slideably supporting the piston, made of a fiber-reinforced aluminum alloy containing at least an alumina fiber as a reinforcing material, wherein the alpha rate of the alumina fiber is set in a range of 10.0 to 50.0% and the volume content of the alumina fiber is set in a range of 8.0 to 20.0%. Another embodiment employs carbon fibers in addition to the alumina fibers. Further, the walls of the cylinder barrel are of a varying thickness to equalize the cooling and cause uniform thermal expansion of the cylinder barrel.
摘要:
An internal combustion engine having a cylinder block made of a light-alloy with a cylinder wall around a cylinder bore including a cylindrical fiber-reinforced portion which is formed of a mixture of an alumina-based fiber and a carbon fiber with a light-alloy matrix. The alumina-based fiber has a fiber volume fraction set in a range of 8 to 20%, and the carbon fiber has a fiber volume fraction set in a range of 0.3 to 15%. The alumina-based fiber contains 25% or less, by weight, of silica, has an average aspect ratio of 20 to 150, and an alpha rate of 2 to 60%. The carbon fiber has an average aspect ratio set in a range of 10 to 100 and a Young's modulus set in a range of 20 to 30 t/mm.sup.2. The piston for the cylinder bore has an iron-plated layer covered by a tin-plated layer. The piston rings for the piston may be of austenitic stainless steel to provide thermal expansion characterics similar to the cylinder wall and may be provided with a nitride or chromium-plated layer.
摘要翻译:一种内燃机,其具有由轻合金制成的气缸体,其具有围绕气缸孔的气缸壁,所述气缸体包括圆柱形纤维增强部分,所述圆柱形纤维增强部分由氧化铝基纤维和碳纤维与轻合金的混合物形成 矩阵。 氧化铝系纤维的纤维体积分数为8〜20%的范围,碳纤维的纤维体积分数为0.3〜15%的范围。 氧化铝系纤维含有25重量%以下的二氧化硅,平均纵横比为20〜150,α率为2〜60%。 碳纤维的平均纵横比设定在10〜100的范围,杨氏模量设定在20〜30t / mm 2的范围内。 用于气缸孔的活塞具有被镀锡层覆盖的镀铁层。 用于活塞的活塞环可以是奥氏体不锈钢,以提供类似于气缸壁的热膨胀特性并且可以设置有氮化物或镀铬层。
摘要:
A process for producing a ceramic molding having a three-dimensional network structure with a plurality of spherical cells and a plurality of through holes present in dividing walls between the spherical cells, includes: a step of obtaining an aggregate of coated particles in which a plurality of ceramic particles are attached to the surface of spherical synthetic resin particles; a step of arranging the aggregate of coated particles in closest packed form within a mold; a step of filling gaps in the aggregate of coated particles with a ceramic so as to give a shaped product; a step of releasing the shaped product from the mold; a step of thermally decomposing the spherical synthetic resin particles of the shaped product so as to form the spherical cells and form the plurality of through holes in dividing wall-forming sections that are present between adjacent spherical cells; and a step of sintering the ceramic particles and the ceramic so as to form the dividing walls.
摘要:
A defrosting method and apparatus for defrosting frozen food products which is based on a pressure reducing chamber in which the frozen food products are placed for defrosting; a vacuum pump for reducing the pressure in the pressure reducing chamber to a pressure level at or below the sublimation pressure of said frozen food products; a microwave heating unit; and a support jig for supporting said frozen food products.
摘要:
An alkali metal iodide and phosphoric acid are homogeneously supported on an activated carbon honeycomb, in respective amounts of 0.015 to 1.5 mg atoms as iodine and 1.4 to 7.0 mg equivalents per gram of activated carbon. The alkali metal iodide is potassium iodide. When both the chemicals are supported on activated carbon in amounts respectively within the above ranges, homogeneous supporting of phosphoric acid with the alkali metal iodide becomes possible without causing any decrease in adsorption and elimination capacities. A number of malodorous and harmful components such as nitrogen-containing compounds and sulfur-containing compounds can be efficiently removed with one kind of activated carbon over a long period of time. The activated carbon adsorbent thus obtained can be used for various deodorization purposes and in exhaust gas treatment, and is particularly suited for use in toilet deodorization and in gas treatment in closed spaces, for example in refrigerators.