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    • 1. 发明专利
    • Method for manufacturing engine valve
    • 制造发动机阀的方法
    • JP2013014830A
    • 2013-01-24
    • JP2011150326
    • 2011-07-06
    • Toyota Motor Corpトヨタ自動車株式会社Toyota Central R&D Labs Inc株式会社豊田中央研究所
    • HIJII TAKUMINISHIKAWA NAOKIKAWAGUCHI AKIOKOSAKA HIDEMASASHIMIZU FUMIOWAKIZAKA YOSHIFUMI
    • C25D11/04C23C28/00C25D11/18F01L3/02
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing an engine valve composing an internal combustion engine excellent in swing characteristic and radiation performance.SOLUTION: There is provided a method for manufacturing the engine valve 10, which includes a head part 1 facing a combustion chamber of the internal combustion engine and a shaft part 2 extending in an inlet valve or exhaust valve integrated with the head part 1, and is formed of iron-based materials. The method includes a first step of forming an aluminum-plated film 4 on whole circumference of the engine valve 3; a second step of anodizing the aluminum-plated film 4 into an anodized film 5; and a third step of sealing the surface of the anodized film 5 to form a sealed film 6 in the head part 1; where in the first step, the film thickness t1 of the aluminum-plated film 4 is adjusted to 1/2 or less of the film thickness t2 of the anodized film 5 to be formed.
    • 解决的课题:提供构成摆动特性和放射性能优异的内燃机的发动机阀的制造方法。 提供了一种制造发动机气门10的方法,其包括面向内燃机的燃烧室的头部1和在与头部一体化的入口阀或排气阀中延伸的轴部2 1,由铁基材料形成。 该方法包括在发动机气门3的整个圆周上形成镀铝膜4的第一步骤; 将镀铝膜4阳极氧化成阳极氧化膜5的第二步骤; 以及密封阳极氧化膜5的表面以在头部1中形成密封膜6的第三步骤; 其中在第一步骤中,将镀铝膜4的膜厚度t1调整为要形成的阳极氧化膜5的膜厚度t2的1/2以下。 版权所有(C)2013,JPO&INPIT
    • 8. 发明专利
    • Internal combustion engine
    • 内燃机
    • JP2012047134A
    • 2012-03-08
    • JP2010191409
    • 2010-08-27
    • Toyota Central R&D Labs Inc株式会社豊田中央研究所
    • KOSAKA HIDEMASAWAKIZAKA YOSHIFUMIINAYOSHI MINAJIIIDA SHINYA
    • F02F1/24F02B77/11F02F3/10F02F3/12F02F3/28
    • F05C2251/048Y02T10/125
    • PROBLEM TO BE SOLVED: To suppress turbulent heat transfer in a combustion chamber which is one of the causes of heat loss in an internal combustion engine.SOLUTION: In the internal combustion engine 10, heat insulation films 40, 42 having a heat conductivity lower than that of a combustion chamber base material and a per-unit-volume heat capacity lower than that of the combustion chamber base material are formed on a wall surface facing a combustion chamber 26, wherein each element composing the combustion chamber 26 are taken as the combustion chamber base material. Concavoconvex shapes 50 are formed on an upper surface 30 of a piston 12 or a lower surface 32 of a head part. Each of the concavoconvex shapes 50 radially extends from the center of the upper surface 30 or the lower surface 32. The concavoconvex shapes 50 are preliminarily formed on the upper surface of the piston 12 or the like. Heat insulation films 40, 42 are disposed on tops of the concavoconvex shapes 50. The concavoconvex shapes 50 are 0.1-0.2 mm in height.
    • 要解决的问题:为了抑制作为内燃机的热损失的原因之一的燃烧室中的湍流传热。 解决方案:在内燃机10中,具有低于燃烧室基材的导热率的热导率低于燃烧室基材的单位体积热容的绝热膜40,42, 形成在面向燃烧室26的壁表面上,其中构成燃烧室26的每个元件被作为燃烧室基材。 凹凸形状50形成在活塞12的上表面30或头部的下表面32上。 每个凹凸形状50从上表面30或下表面32的中心径向延伸。凹凸形状50预先形成在活塞12的上表面等上。 绝热膜40,42设置在凹凸形状50的顶部。凹凸形状50的高度为0.1-0.2mm。 版权所有(C)2012,JPO&INPIT