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:
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:
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 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:
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:
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 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 method of forming a powder metal fractured bearing component, such as a connecting rod, includes the step of forming a component blank having a bearing aperture for separation of the component blank into a main body and a bearing cap, wherein the component has a hardness in the range of about HRC 22 to about HRC 34. The method also includes the steps of forming a stress riser in the blank where the fracture is to occur, and fracturing the component blank of the connecting rod into a main body and a bearing cap by applying tensile force thereto, in order to form a surface area ratio of >113% on the mating surfaces of the main body and the bearing cap.
摘要:
The present invention is directed to a cylinder head for an internal combustion engine, the cylinder head having a valve seat formed therein. The valve seat comprises a plurality of reinforcing fibers cast in a metal matrix. The metal matrix is integrally formed with the valve body by being cast with the remaining portion valve body. The valve seat and valve body are cast from the same material.
摘要:
An engine part with a cast main body and a manifold type ceramic liner which is cast in the main body to define a manifold type exhaust passage therein, the ceramic liner including a hollow cylindrical liner body and a plurality of cylinder members branched from the liner body, a through portion being provided at a branched area of the ceramic liner for communicating inside and outside of the ceramic liner at which area adjacent cylinder members are branched apart, the through portion being filled with a molten metal at the time of casting the main body.