| 摘要 |
Piston for internal combustion engines having a piston body consisting of light metal and a crown plate consisting of a metal of lower thermal conductivity which is secured axially to the piston body by means of necked-down screws and centered radially in relation to the piston body by means of an annular fit, and in which the outer ring of the fit is formed by the crown plate in the region of the sliding surface and the inner ring of the fit is formed by the piston body, in which at room temperature a gap widening in the direction towards the piston foot is provided between the annular surfaces of crown plate and piston body meeting in the annular fit, in such a way that the annular surfaces lie firmly against one another only at their ends pointing towards the piston head, and that this gap is reduced at working temperature.
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