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    Four-stroke internal combustion engine with spark ignition
    1.
    发明授权
    Four-stroke internal combustion engine with spark ignition 失效
    具有火花点火的四冲程内燃机

    公开(公告)号：US5943993A

    公开(公告)日：1999-08-31

    申请号：US20428

    申请日：1998-02-09

    Applicant: Hartmut Carstensen ,  Christian Beidl ,  Frank Mundorff

    Inventor： Hartmut Carstensen ,  Christian Beidl ,  Frank Mundorff

    IPC: F02B23/10 ,  F02B31/08 ,  F02B75/02 ,  F02B75/12 ,  F02F1/24 ,  F02F1/42 ,  F02F3/26 ,  F02B31/00

    CPC classification number: F02B31/085 ,  F02B23/104 ,  F02F3/26 ,  F02B2023/106 ,  F02B2023/108 ,  F02B2075/027 ,  F02B2075/125 ,  F02B2275/48 ,  F02F1/4214 ,  F02F2001/245 ,  Y02T10/123 ,  Y02T10/125 ,  Y02T10/146

    Abstract: The invention relates to a four-stroke internal combustion engine with spark ignition and direct injection of the fuel into the combustion chamber, with a reciprocating piston for each cylinder and a roof-shaped top of the combustion chamber with at least one exhaust valve and at least two intake valves, as well as intake ports generating a tumble flow in the combustion chamber, as well as a fuel injection device opening into the combustion chamber, and an ignition source located in the area of the cylinder axis in the roof of the combustion chamber. In order to obtain good internal flow conditions the surface of the piston facing the combustion chamber is provided with a substantially Y-shaped configuration of flow guiding ribs, of which an arc-shaped rib is positioned approximately in the center of the piston and encloses a trough-shaped recess, and a longitudinal rib is provided on the side of the arc-shaped rib opposite of the recess, and the ignition source is positioned above the recess, and the fuel injection device is positioned in the area of the cylinder wall between the intake valves.

    Abstract translation: 本发明涉及一种四冲程内燃机，其具有火花点火并且直接将燃料喷射到燃烧室中，每个气缸的往复活塞和燃烧室的顶部形状的顶部具有至少一个排气阀，并且位于 至少两个进气门，以及在燃烧室中产生翻滚流的进气口以及通向燃烧室的燃料喷射装置，以及位于燃烧室顶部的气缸轴线区域中的点火源 房间。 为了获得良好的内部流动条件，面向燃烧室的活塞的表面设置有大致Y形的流动引导肋，其弧形肋大致位于活塞的中心并且包围一个 槽状凹部和纵向肋设置在与凹部相对的弧形肋的侧面上，并且点火源位于凹部的上方，并且燃料喷射装置位于气缸壁之间的区域之间 进气阀。

    Piston ring for internal combustion engine
    2.
    发明授权
    Piston ring for internal combustion engine 失效
    内燃机活塞环

    公开(公告)号：US4465515A

    公开(公告)日：1984-08-14

    申请号：US286654

    申请日：1981-07-24

    Applicant: Frank Mundorff

    Inventor： Frank Mundorff

    IPC: F02F5/00 ,  B22F5/02 ,  C22C19/05 ,  C22C19/07 ,  C22C32/00 ,  F02B3/06 ,  F16J9/26

    CPC classification number: F16J9/26 ,  C22C32/0084 ,  F02B3/06 ,  Y10T29/49274

    Abstract: To provide piston rings which are ductile, can be heavily thermally loaded, and are not attacked by corrosive residues occurring upon combustion of residual oil or other sulfur-containing heavy Diesel oils, a powder mixture is sintered in an isostatic hot-pressure sintering process in which a hard metal and a soft filler material are combined; in accordance with one embodiment, the base is a hard metal using nickel or cobalt-based alloys present in 40-80% by weight, the remainder filler which, for example, is unrefined or galvanically coated graphite; in a second embodiment, the base is a soft material such as a high-copper content bronze, and the filler is a nickel or cobalt-based alloy, with the base metal being present in 60-80%, the filler being the remainder (all percentages by weight). Isostatic hot compression results in piston rings which can operate, under emergency conditions, without, or with only insufficient lubrication, have high strength, resistance to attack by corrosive substances, and have sufficient ductility for simple assembly and long wear.

    Abstract translation: 为了提供具有延展性的活塞环，可以重度热负载，并且在残留油或其它含硫重质柴油的燃烧时不会发生腐蚀性残留物，粉末混合物在等静压热压烧结过程中烧结 硬金属和软填料材料组合在一起; 根据一个实施方案，碱是使用以40-80重量％计的镍或钴基合金的硬质金属，剩余的填料例如是未精制或电镀石墨; 在第二实施方案中，基材是诸如高铜含量的青铜的软材料，并且填料是镍或钴基合金，其中母体金属以60-80％存在，填料为余量（ 所有重量百分比）。 等静压热压缩导致活塞环在紧急情况下，无润滑润滑或只有不足的润滑作用，具有高强度，耐腐蚀性物质的侵蚀性，并具有足够的延展性，可简化组装和长时间磨损。

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