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公开(公告)号：US20160341147A1
公开(公告)日：2016-11-24
申请号：US15159988
申请日：2016-05-20
发明人： Sascha BURKHARD , Dirk MOOSER , Ingo LANGSCHWAGER , Eike Joachim SIXEL , Kai RUSCHMEYER , Marius WOLFGRAMM , Hendrik Johannes LANGE , Michael STURM
CPC分类号： F02F3/0015 , F02B23/10 , F02B2023/106 , F02D19/10 , F02F3/22 , F02M21/0215 , Y02T10/125 , Y02T10/36
摘要： A piston top structural unit for an internal combustion engine may include a piston crown structure providing a top surface and a peripheral surface, wherein, regarding a center axis of the piston, the top surface is configured to delimit the piston top structural unit axially with respect to a combustion chamber of the internal combustion engine and the peripheral surface is configured to delimit the piston top structural unit radially. The top surface may include a rim surface extending around the center axis, and an inner surface delimiting a piston bowl radially within the peripheral surface. The inner surface may include an area of lowest positions of the piston bowl, a first side wall surface extending essentially along the direction of the center axis from a first border section of the area of the lowest positions to the rim surface, a deflecting bottom surface raising from a second border section of the area of the lowest positions to form an asymmetric piston bowl bottom, and at least one second side wall surface extending essentially along the direction of the center axis from a respective border section of the deflecting bottom surface to the rim surface. The asymmetric shape may allow the generation of a tumble flow of charged air for improving ignition.
摘要翻译： 用于内燃机的活塞顶部结构单元可以包括提供顶表面和外周表面的活塞冠结构，其中，关于活塞的中心轴线，顶表面被构造成将活塞顶部结构单元轴向地限定 到内燃机的燃烧室，并且周面被构造成径向地界定活塞顶部结构单元。 顶表面可以包括围绕中心轴线延伸的边缘表面，以及在周边表面内径向限定活塞碗的内表面。 内表面可以包括活塞碗的最低位置的区域，基本上沿着中心轴线的方向从最低位置的区域的第一边界部分延伸到边缘表面的第一侧壁表面，偏转底表面 从最低位置的区域的第二边界部分升高以形成不对称的活塞碗底部，以及至少一个第二侧壁表面，其至少一个第二侧壁表面基本上沿着中心轴线的方向从偏转的底部表面的相应边界部分延伸到 轮辋表面。 不对称形状可以允许产生用于改善点火的带电空气的翻滚流。
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公开(公告)号：US20160084179A1
公开(公告)日：2016-03-24
申请号：US14852878
申请日：2015-09-14
发明人： Hauke HOLST , Hendrik Johannes LANGE , Eike Joachim SIXEL , Marius WOLFGRAMM , Arvind SIVASUBRAMANIAN
CPC分类号： F02D41/0027 , F02D19/0642 , F02D35/023 , F02D37/02 , F02D41/1475 , F02P9/002 , Y02T10/36
摘要： A method for controlling an internal combustion engine operating on at least partly gaseous fuel is disclosed. The method may include providing a desired burn rate profile corresponding to a desired operation of the internal combustion engine. The method may further include selecting first operating parameters such that an operation of the internal combustion engine with a first gas composition produces a first burn rate profile that corresponds to the desired burn rate profile. The method may also include operating the internal combustion engine with the first operating parameters using a second gas composition. The method may include determining that the second burn rate profile differs from the desired burn rate profile. In addition, the method may include adjusting an operating parameter from among the first operating parameters of the internal combustion engine to approach the desired burn rate profile.
摘要翻译： 公开了一种用于控制在至少部分气态燃料上运行的内燃机的方法。 该方法可以包括提供对应于内燃机的期望操作的期望燃烧速率曲线。 该方法还可以包括选择第一操作参数，使得具有第一气体组合物的内燃机的操作产生对应于期望的燃烧速率曲线的第一燃烧速率曲线。 该方法还可以包括使用第二气体组合物以第一操作参数操作内燃机。 该方法可以包括确定第二燃烧速率曲线与期望的燃烧速率曲线不同。 此外，该方法可以包括从内燃机的第一操作参数中调整操作参数以接近期望的燃烧速率曲线。
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公开(公告)号：US20150226144A1
公开(公告)日：2015-08-13
申请号：US14612320
申请日：2015-02-03
CPC分类号： F02D41/0085 , F02D19/023 , F02D19/025 , F02D35/023 , F02D35/027 , F02D37/02 , F02D41/0002 , F02D41/0027 , F02D41/1498 , F02D41/401 , F02D2200/025 , F02P5/045 , F02P5/152 , Y02T10/44
摘要： A method for balancing a plurality of cylinders during operation of an internal combustion engine having a plurality of gas admission valves includes operating the internal combustion engine with a first common ignition timing for each of a plurality of cylinders. While operating with the first common ignition timing, a cylinder having an above-average knock level is determined, and an opening duration of the gas admission valve associated with this cylinder is reduced. This is repeated until the knock levels for all cylinders differ from each other by less than a predetermined amount. When the knock levels for all cylinders differ by less than the predetermined amount, the first common ignition timing is advanced to a second ignition timing.
摘要翻译： 在具有多个气体入口阀的内燃机的操作期间平衡多个气缸的方法包括以多个气缸中的每一个的第一公共点火正时操作内燃机。 当在第一公共点火正时操作时，确定具有高于平均爆震水平的气缸，并且减小与该气缸相关联的进气阀的打开持续时间。 重复这一操作，直到所有气缸的敲击水平彼此相差小于预定量。 当所有气缸的爆震等级相差小于预定量时，第一公共点火正时提前到第二点火正时。
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