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2. 发明公开

EP1010874A1 Two-cycle engine 有权
标题翻译： Zweitakt机械
公开(公告)号：EP1010874A1
公开(公告)日：2000-06-21
申请号：EP99124951.7
申请日：1999-12-14
申请人： Tanaka Kogyo Co., Ltd.
发明人： Ishida, Shigetoshi , Tsuruoka, Naoki , Sensui, Yasuhiro
IPC分类号： F02B25/14
CPC分类号： F02B25/14
摘要： There are provided scavenging passages (11) on the cylinder side and the crankcase side (10) as the passages to supply scavenging gas into the cylinder (3) in a loop scavenging type two-cycle engine (1). The passage (11) on the cylinder side comprises a passage inside the cylinder sidewall having substantially the same diameter as that of the opening area of the scavenging charge port, while the passage (10) on the crankcase side comprises a space (12) between the inner peripheral surface at the top end of the crankcase and the outer peripheral surface of the piston, and a connection means (13) provided between the top end of the space and the lower end of the scavenger passage of the cylinder. As the fuel mixture in the crank chamber (5) flows into the scavenging passage (11) on the cylinder side through the narrow space of the passage (10) on the crankcase side and the connection means, the rapid inflow of the fuel mixture into the cylinder (3) is restrained and the supply of the fuel mixture is sustained constantly high until the latter half of the scavenging time. This enables an optimum supply of fuel mixture, and radically decreases the amount of unburned gas in the fuel mixture that is emitted with the exhaust gas.
摘要翻译：在循环式二冲程发动机（1）中，在气缸侧设有扫气通路（11）和曲轴箱侧（10），作为向气缸（3）供给清扫气体的通道。气缸侧的通道（11）包括在气缸侧壁内的通道，其具有与扫气装料口的开口面积基本相同的直径，而曲轴箱侧的通道（10）包括位于曲轴箱的顶端的内周面和活塞的外周面，以及设置在空间的顶端和气缸的清扫通道的下端之间的连接装置（13）。当曲柄室（5）中的燃料混合物通过曲轴箱侧的通道（10）的狭窄空间和连接装置流入气缸侧的扫气通道（11）时，燃料混合物迅速流入汽缸（3）被限制，并且燃料混合物的供应持续保持到下一半的清扫时间。这使得能够最佳地供应燃料混合物，并且大大降低与排气一起排出的燃料混合物中的未燃烧气体的量。

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