公开(公告)号：US4084568A

公开(公告)日：1978-04-18

申请号：US646398

申请日：1976-01-02

申请人： Kazunobu Sato ,  Takanori Suzuki ,  Tadataka Kobayashi ,  Takeshi Miyazawa

发明人： Kazunobu Sato ,  Takanori Suzuki ,  Tadataka Kobayashi ,  Takeshi Miyazawa

IPC分类号： F01L13/08 ,  F02B75/02 ,  F02N19/00

CPC分类号： F02N19/004 ,  F01L13/08 ,  F02B2075/027

摘要： Improved decompression-type, four-cycle internal-combustion engine which has the conventional compression chamber, reciprocable piston, and intake valve therein; comprising, in accordance with the invention, means for delaying the closing time of the valve, in the course of the compression stroke, with the piston moving upwards, for obtaining reduced compression pressure; and means for closing the valve to its at least nearly closed condition within the closing delay period. The inventive delaying and closing means is preferably embodied in a specifically shaped cam for controlling the operation of the intake valve, with respective depressed, slightly protruding as well as flat portions at preferred, predetermined crank angle positions.

摘要翻译： 改进的减压型四冲程内燃机，其中具有常规压缩室，往复活塞和进气阀; 根据本发明，包括用于在压缩冲程的过程中延迟阀的关闭时间的装置，随着活塞向上移动，以获得降低的压缩压力; 以及用于在所述关闭延迟时段内将所述阀关闭至其接近闭合状态的装置。 本发明的延迟和关闭装置优选地体现在用于控制进气门的操作的特定形状的凸轮中，在优选的预定曲柄角位置处具有相应的凹陷，略微突出以及平坦部分。