| 摘要 |
An oil ring for an internal combustion engine, comprising a metallic annular body ( 10 ) to be mounted around a piston (P) reciprocating inside a cylinder (C) of the engine, said annular body ( 10 ) having opposite lateral faces ( 11 ), an internal face ( 12 ) onto which will be seated a resilient expander (M), and an external contact face ( 13 ) to be seated against the internal face of the cylinder (C) and having a height (h) that is substantially smaller than the height (H) of the internal face ( 12 ). Each lateral face ( 11 ) is defined by one or more lateral face portions ( 11 a, 11 b), which are designed to reduce the moment of inertia of the annular body ( 10 ), giving higher conformability to the latter. Preferentially, but not exclusively, the annular body ( 10 ) can be further provided with channels ( 15, 16 ), extended along at least part of the ring hight and which are radially spaced back in relation to the external contact face ( 13 ).
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