摘要:
To provide a sintered alloy valve guide having high thermal conductivity and excellent wear resistance, which can be used in engines subjected to a large thermal load due to downsizing, direct injection and supercharging, the sintered alloy has a composition comprising by mass 10-90% of Cu, 0-10% of Cr, 0-6% of Mo, 0-8% of V, 0-8% of W, and 0.5-3% of C, the balance being substantially Fe and inevitable impurities, the total amount of Cr, Mo, V and W being 2% or more, and a structure comprising an Fe-based alloy phase, a Cu or Cu-based alloy phase, and a graphite phase.
摘要:
There is provided a seal device having a seal ring structure assemblable without lowering the assembling efficiency of CVT, and free from oil leakage when an oil pump is not operated with an engine stopped, namely when oil pressure is not applied to the seal ring, which comprises a combined seal ring comprising an endless resin ring having an outer peripheral surface in slidable contact with an inner peripheral surface of an outer member, and a coil expander pushing the resin ring toward its outer peripheral surface and side surface, the coil expander being arranged in a corner recess portion of the resin ring between its pressure-receiving side surface and its inner peripheral surface, and an inner peripheral side of the combined seal ring being separate from a bottom of the seal ring groove.
摘要:
A combined oil control ring comprising a pair of circular side rails (3) each having a gap, and a spacer expander (2) longitudinally sandwiched by the side rails (3), which has seating tabs (6) for pushing inner surfaces of the side rails (3) on the inner side, a side rail-pushing surface of each seating tab (6) being provided with one or more grooves extending substantially longitudinally; each of the side rail-pushing surfaces including the grooves being provided with a nitride layer, and the depth d (µm) of the grooves, the surface hardness h (micro-Vickers hardness HV0.1) of the nitride layer, and the thickness t (µm) of the nitride layer having micro-Vickers hardness HV0.1 of 700 or more meeting the relation of the 0.05 ≤ 1000 x d/(h x t) ≤ 0.45.
摘要:
The present invention provides a fuel electrode doubling as a support of a solid oxide fuel cell that hardly deteriorates conductivity and strength thereof through repetitive exposure to reducing atmosphere/oxidizing atmosphere. The fuel electrode doubling as the support of the solid oxide fuel cell according to the present invention includes: a porous structure formed of first oxide particles having a 10% cumulative particle diameter between 5 µm and 12 µm and a 90% cumulative particle diameter between 84 µm and 101 µm; and electrode particles having an electrode catalytic activity that cover a surface in a gap of the porous structure and have a surface covered with second oxide particles by 10% to 70%.
摘要:
An object of the present invention is to provide a piston ring for an internal combustion engine capable of preventing aluminum cohesion for a long time under high temperature and high load conditions. Specifically, a piston ring 1 for the internal combustion engine including a piston ring base material 11 coated with an aluminum cohesion resistant film 12, wherein the aluminum cohesion resistant film 12 is made of ceramics coated on at least one of an upper side face 11a and a lower side face 11b of the piston ring base material 11.
摘要:
An object of the present invention is to provide a radio wave absorber at low cost that has an excellent radio wave absorption property for absorbing microwaves and millimeter waves and hardly deteriorates the radio wave absorption property even after exposure to high-power radio waves. Specifically, the radio wave absorber according to the present invention for absorbing the microwaves and the millimeter waves is characterized in having a base material made of a porous compact containing composite oxide of calcium and aluminum; and a conductive material added to the base material.
摘要:
A piston ring that can maintain an excellent aluminum adhesion prevention effect over a long period in a high output engine is provided. One aspect of a piston ring according to the present invention is a piston ring in which at least one of upper and lower surfaces is covered with a resin-based film containing a plate-like filler, wherein the plate-like filler contains at least one of a group selected from alumina, silicon carbide, silicon nitride, and boron nitride.
摘要:
To provide a price-competitive compression ring having excellent thermal conductivity and thermal sag resistance, which can be used in a high-thermal-load environment of high-compression-ratio engines, steel identified by the material number of SKS93 in JIS G 4404 is used, and a piston ring wire is annealed before an oil-tempering treatment such that spheroidal cementite having an average particle size of 0.1-1.5 µm is dispersed in a tempered martensite matrix.
摘要翻译:为了提供具有优良导热性和耐流动阻力的价格竞争的压缩环,可用于高压缩比发动机的高热负荷环境中,JIS G 4404中SKS93的材料编号确定的钢是 使用,并且在回火处理之前将活塞环线材退火,使得平均粒径为0.1-1.5μm的球状渗碳体分散在回火马氏体基质中。