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公开(公告)号：US5040496A
公开(公告)日：1991-08-20
申请号：US440194
申请日：1989-11-22
CPC分类号： F02F1/22 , F02B25/14 , F02B2075/025
摘要： In known two-stroke internal combustion engines with piston-controlled intake passages for the fresh charge and one or more exhaust passages for the exhaust gases, the actual direction of flow will deviate from the theoretical flow direction defined by the passage walls because of the influence exerted by the piston edge. The scavenge flow is deflected in the direction of the exhaust passage and the cylinder head, which will cause increased losses of fresh charge. This will considerably lower scavenge efficiency, and thus lead to a marked deterioration of engine performance, fuel consumption and exhaust emission. In the invention these disadvantages are avoided by aligning the flow guide vanes such that they form an angle, preferably of 90.degree., thus acting as a flow director.
摘要翻译： 在具有活塞控制的新鲜进料通道和一个或多个废气排气通道的已知二冲程内燃机中，由于影响，实际的流动方向将偏离由通道壁限定的理论流动方向 由活塞边缘施加。 清扫流在排气通道和气缸盖的方向上偏转，这将导致新鲜进料的损失增加。 这将大大降低清扫效率，从而导致发动机性能，燃料消耗和废气排放明显恶化。 在本发明中，这些缺点通过对准导流叶片而避免，使得它们形成一个角度，优选为90°，从而用作导流器。
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公开(公告)号：US5044159A
公开(公告)日：1991-09-03
申请号：US496639
申请日：1990-03-21
CPC分类号： F02B27/04 , Y02T10/146
摘要： In an exhaust system for two-stroke cycle engines, comprising an exhaust pipe whose front end, which is characterised by a constant cross-section, is followed by two or more conical sections, these conical sections are configured as diffusers, which are connected to the front end of the exhaust pipe with its constant cross-section by means of branch pipes of different length, and which open into a common exhaust header at the other end, which header in turn is connected to the exhaust tail pipe comprising a catalytic converter and/or a silencer. This arrangement has the effect that a pressure wave coming from the cylinder is twice reflected as a suction wave arriving at the still open exhaust port at different times due to the difference in pipe length. In this manner the effective duration of the suction wave is prolonged over that of comparable exhaust systems of a known kind.
摘要翻译： 在用于二冲程循环发动机的排气系统中，包括排气管，其前端的特征在于恒定的横截面，后面是两个或更多个锥形部分，这些锥形部分被构造为扩散器，其连接到 排气管的前端通过不同长度的分支管具有恒定的横截面，并且在另一端开口到共同的排气集管，该集管又连接到排气尾管，该排气尾管包括催化转化器 和/或消音器。 这种布置具有这样的效果：由于管长度的差异，来自气缸的压力波作为从不同时间到达静止排气口的吸力波反射两次。 以这种方式，吸入波的有效持续时间比已知类型的排气系统的有效持续时间延长。
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公开(公告)号：US5279266A
公开(公告)日：1994-01-18
申请号：US4269
申请日：1993-01-14
申请人： Klaus Landfahrer , Hans Alten , Karl Wojik
发明人： Klaus Landfahrer , Hans Alten , Karl Wojik
CPC分类号： F02B27/04 , F02F1/22 , F02B2075/025 , Y02T10/146
摘要： In a two-stroke internal combustion engine with at least one cylinder opeg into an exhaust passage with a diffuser-type flare whose shape is determined mainly by that of the lower contour, an optimum flow pattern in the exhaust passage is obtained by providing the exhaust passage with a nozzle-like throat in the immediate vicinity of the cylinder, which is formed by the lower contour and is followed by the diffuser-type flare, either immediately or at a distance.
摘要翻译： 具有一个或多个气缸（1）的二冲程内燃机，排气口（3）从中排出，其具有特别是通过底部轮廓（3b）的成形而形成的扩散器状膨胀。 实现排气口（3）中的最佳流动，即在汽缸（1）之后的排气口（3）具有通过底部轮廓（3b）的成形而形成的喷嘴状限制，并且 扩散器样扩展直接或间隔地连接。
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公开(公告)号：US6062027A
公开(公告)日：2000-05-16
申请号：US83244
申请日：1998-05-22
申请人： Klaus Landfahrer , Walter Reczek , Wolfgang Cartellieri , Hans Aufinger , Gabor Hrauda , Wolfgang Kriegler
发明人： Klaus Landfahrer , Walter Reczek , Wolfgang Cartellieri , Hans Aufinger , Gabor Hrauda , Wolfgang Kriegler
CPC分类号： F02B37/00 , F02M26/19 , F02M26/28 , F01N2260/14 , F02B29/04 , F02D9/04 , F02M26/05 , F02M26/10 , F02M26/24 , Y02T10/144
摘要： In an internal combustion engine with an exhaust gas turbocharger comprising a charge-air pipe and an exhaust gas recirculation pipe for a partial stream of the exhaust gas, a nozzle-diffuser unit is provided in the charge-air pipe, into which unit the recirculation pipe opens in a passage of restricted cross-section. In order to achieve high turbine efficiency as well as high exhaust quality, it is provided in the invention that the exhaust gas turbocharger be configured at least as a twin-entry unit, and that at least two exhaust gas flow paths be conducted separately to the entrance into the exhaust gas turbocharger, and that an exhaust gas recirculation branch depart from each exhaust gas flow path, and further that a control valve be positioned in each recirculation branch for regulation of the exhaust gas recirculation.
摘要翻译： 在具有排气涡轮增压器的内燃机中，所述排气涡轮增压器包括用于排气的部分流的增压空气管和废气再循环管，在所述增压空气管中设置有喷嘴扩散单元，所述再循环单元 管道在横截面受限制的通道中打开。 为了实现高涡轮机效率以及高排气质量，在本发明中提供的是，排气涡轮增压器至少配置为双入口单元，并且至少两个废气流动路径分别进行到 进入废气涡轮增压器，并且废气再循环分支离开每个废气流动路径，并且还将控制阀定位在每个再循环分支中，以调节废气再循环。
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