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    • 8. 发明授权
    • Piston structure with a combustion chamber
    • 具有燃烧室的活塞结构
    • US5645028A
    • 1997-07-08
    • US561002
    • 1995-11-21
    • Hiroshi MatsuokaHideo Kawamura
    • Hiroshi MatsuokaHideo Kawamura
    • F02B23/06F02B19/08
    • F02B23/0675F02B23/0603F02B23/0627F02B23/0633F02B23/0636F02B2023/0609F02B2023/0612F02B2275/14F05C2201/046Y02T10/125
    • The combustion chamber structure having a combustion chamber almost at the center of the piston is installed in a cavity formed in the piston body with a heat insulating layer interposed therebetween. The combustion chamber structure and the piston body are joined by a joining member. The combustion chamber structure is formed with a nozzle insertion hole and communication holes. The joining member is made of a material with a thermal expansion coefficient intermediate between those of the piston body and the combustion chamber structure, or of almost the same kind of material as the piston body. Alternatively, the combustion chamber structure forms a piston head portion and the piston body forms a piston skirt portion. The lower surface of the piston head portion is formed as a tapered surface that is inclined toward the periphery. The upper surface of the piston skirt portion is also formed as a tapered surface that extends along the opposing tapered surface of the piston head portion. The lower surface of the outer periphery of the piston head portion and the upper surface of the outer periphery of the piston skirt portion are in firm contact with each other. The combustion chamber structure of this invention is so constructed that a rich air-fuel mixture is generated in the upper part of the combustion chamber and that the mixture is quickly ejected into the cylinder chamber to reduce the combustion period.
    • 具有几乎在活塞中心的燃烧室的燃烧室结构安装在形成在活塞体中的空腔中,隔热层之间插入有绝热层。 燃烧室结构和活塞体通过接合构件接合。 燃烧室结构形成有喷嘴插孔和连通孔。 接合构件由热膨胀系数介于活塞体和燃烧室结构之间的材料制成,或者与活塞体几乎相同的材料制成。 或者,燃烧室结构形成活塞头部,活塞主体形成活塞裙部。 活塞头部的下表面形成为朝向周边倾斜的锥面。 活塞裙部的上表面也形成为沿着活塞头部的相对的锥形表面延伸的锥形表面。 活塞头部的外周的下表面和活塞裙部的外周的上表面彼此牢固接触。 本发明的燃烧室结构构造成在燃烧室的上部产生浓的空气燃料混合物,并且混合物迅速地喷射到气缸室中以减少燃烧周期。