傾斜リングピストンによるピストンスラップの低減(第1報) : 理論解析

概要

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Piston slap has been the focus of considerable interest for several decades in the industrial world and various methods has been experimented to avoid severe piston slap. However, they are not always sufficient for the industrial requests. In this paper, inclined ring piston is proposed as the new reduction method of piston slap and its geometry and dynamics are analyzed theoretically. As an example, the results of their numerical calculation on the new reciprocating engine equipped with the inclined ring piston area discussed and compared with those on the known one. These results are summarized as follows. (1) The shape of the inclined ring piston is obtained in algebraic expressions. (2) Piston side thrust force and moment about piston pin are obtained in algebraic expressions. (3) It is ascertained that the inclined ring piston is useful to reduce piston slap, especially when inclined direction angle is nearly equal to 90 degrees, and that inclined angle is effective even below 8 degrees.
1984-05-05