Engine
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United States of America Patent
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May 18, 2010
Grant Date -
Jan 24, 2008
app pub date -
Jul 20, 2007
filing date -
Jul 20, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An engine includes: a cylinder block; and a piston ring, in which the cylinder block has a cylinder liner portion formed of an aluminum-based composite reinforced by a ceramic containing at least either of a silicon carbide and an alumina, and in which the piston ring is coated with a nitride film (20) including a vanadium nitride layer (21) exposed on an outer circumferential sliding surface (17).
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