会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 32. 发明授权
    • Fiber reinforced ceramic matrix composite internal combustion engine intake/exhaust valves
    • 纤维增强陶瓷基体复合内燃机进气/排气阀
    • US06363902B1
    • 2002-04-02
    • US09676244
    • 2000-09-29
    • Thomas Edward StrasserSteven Donald Atmur
    • Thomas Edward StrasserSteven Donald Atmur
    • F02N300
    • F01L3/02
    • A fracture-resistant, thermally stable intake or exhaust valve for an internal combustion (IC) engine. The valve has a stem portion and a head portion, both of which are formed of fiber reinforced ceramic matrix composite (FRCMC) material. This FRCMC material generally includes a polymer-derived ceramic resin in its ceramic state, fibers, and filler materials. Employing FRCMC material to form the valve is advantageous as FRCMC material is highly temperature resistant and temperature stable, thereby allowing for increased engine operating temperatures. FRCMC material is also ductile, thus making the valve fracture resistant. The FRCMC material is also flaw-insensitive in that any flaw within the structure of the valve will not result in cracking and failure. In addition, FRCMC valves are considerably lighter than the existing metal valves. This provides an opportunity to reduce the weight of the overall valve train, thereby increasing engine performance. The addition of certain filler materials allows the FRCMC material to be tailored to exhibit a desired degree of harness and/or a desired coefficient of friction. Increasing the hardness of the head of the valve allows it to better withstand the violent environment of the engine cylinder, and lowering the coefficient of friction facilitates the valve movement within the engine.
    • 用于内燃(IC)发动机的耐断裂,热稳定的进气或排气阀。 阀具有杆部和头部,两者均由纤维增强陶瓷基复合材料(FRCMC)材料形成。 该FRCMC材料通常包括其陶瓷状态的聚合物衍生的陶瓷树脂,纤维和填料材料。 使用FRCMC材料形成阀是有利的,因为FRCMC材料具有高温度和温度稳定性,从而允许增加发动机工作温度。 FRCMC材料也是延性,从而使阀门断裂。 因为FRCMC材料也不具有缺陷性,因为阀门结构内的任何缺陷都不会导致开裂和失效。 此外,FRCMC阀门比现有的金属阀门要轻得多。 这提供了减轻整个气门机构的重量从而增加发动机性能的机会。 添加某些填充材料允许FRCMC材料被定制以显示所需程度的线束和/或所需的摩擦系数。 提高阀门头部的硬度使其能够更好地承受发动机气缸的剧烈环境,降低摩擦系数有利于发动机内的阀门运动。