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1. 发明授权

US4706617A Two-cycle engine 失效
标题翻译：双循环发动机
公开(公告)号：US4706617A
公开(公告)日：1987-11-17
申请号：US770056
申请日：1985-08-27
申请人： Masahiro Asai , Toshio Mizushima , Toshiro Kawai , Shigemitsu Akutsu , Yoshiaki Uozumi
发明人： Masahiro Asai , Toshio Mizushima , Toshiro Kawai , Shigemitsu Akutsu , Yoshiaki Uozumi
IPC分类号： F02B75/02 , F02D13/02
CPC分类号： F02D13/0284 , F02B2075/025 , Y02T10/18
摘要： A two-cycle engine includes a port timing control device including a port timing control valve which is mounted on a cylinder block and has a timing control surface. The control valve is movable in a plane substantially perpendicular to the axis of a cylinder between a closed position where the valve is disposed in an exhaust passage with the control surface closing the end portion of the exhaust port closer to a cylinder head and an open position where the valve is held out of the exhaust passage to open the end portion of the exhaust port. The control surface is of an arcuate concave shape and having a curvature substantially equal to that of an inner peripheral surface of the cylinder so as to be smoothly continuous with the inner peripheral surface of the cylinder.
摘要翻译：双冲程发动机包括端口正时控制装置，其包括安装在气缸体上并具有定时控制表面的端口正时控制阀。所述控制阀可在大致垂直于气缸轴线的平面中移动，所述平面位于所述阀设置在排气通道中的关闭位置与所述控制表面关闭所述排气口的靠近气缸盖的端部和打开位置之间其中阀被排出排气通道以打开排气口的端部。该控制面为弓形凹状，其曲率基本上与圆筒的内周面的曲率大致相等，与圆筒的内周面平滑地连续。

2. 发明授权

US4751899A Two-cycle engine 失效
标题翻译：双循环发动机
公开(公告)号：US4751899A
公开(公告)日：1988-06-21
申请号：US50949
申请日：1987-05-15
申请人： Kenzi Ohki , Toshiro Kawai , Yasuhiko Nakano
发明人： Kenzi Ohki , Toshiro Kawai , Yasuhiko Nakano
IPC分类号： F02B1/04 , F02B75/02 , F02D13/02
CPC分类号： F02D13/0284 , F02B75/02 , F02B1/04 , F02B2075/025 , Y02T10/18
摘要： A two-cycle engine includes a port timing control device for varying a timing of the opening of an exhaust port. The port timing control device include a valve member having an end face curved along a cylinder, the valve member being angularly movable in a direction of the axis of the cylinder between an extended position where the valve member is extended into an exhaust passage with the end face closing an upper portion of the exhaust port and a retracted position where the valve member is retracted from the exhaust passage and fully received in a recess formed in an upper wall of the exhaust passage, with the end case opening the upper end portion of the exhaust port. The end face of the valve member is complementary in shape to an end face of the recess. The valve member has a wedge-shaped projection formed on a lower portion of the end face of the valve member and is reducing in thickness progressively toward the cylinder, so that the end face of the valve member has an upper surface and a lower surface extending from a lower end of the upper surface in slanting relation thereto toward the cylinder. The upper surface is held in sliding and sealing contact with an upper portion of the end face of the recess complementary in shape to the upper surface of the end face of the valve member.
摘要翻译：双冲程发动机包括用于改变排气口打开定时的端口定时控制装置。端口正时控制装置包括具有沿着气缸弯曲的端面的阀构件，阀构件可在气缸的轴线方向上在阀构件延伸到排气通道的延伸位置与端部之间成角度地移动面关闭所述排气口的上部，以及所述阀构件从所述排气通道缩回并完全容纳在形成在所述排气通道的上壁中的凹部中的收回位置，所述端壳将所述排气通道的上端部分开排气口。阀构件的端面的形状与凹部的端面互补。阀构件具有形成在阀构件的端面的下部上的楔形突起，并且朝向气缸逐渐减小厚度，使得阀构件的端面具有上表面和下表面延伸从上表面的下端朝向气缸倾斜。上表面保持与凹部的端面的上表面滑动和密封接触，该凹部的形状与阀构件的端面的上表面互补。

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