Valve guide for an internal combustion engine
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United States of America Patent
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Jan 5, 1988
Issued Date -
N/A
app pub date -
Aug 1, 1986
filing date -
Jan 21, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A tubularly formed valve guide (1) with a bore for a metal valve shank (2) for use in an internal combustion engine comprising a sintered body of a partially stabilized zirconium oxide having a porosity of less than 3%. Even under extreme stress, e.g., in an outlet valve of a high-power engine, but in particular in the blow-off valve of an exhaust gas turbocharger, the valve guide shows a considerably reduced wear as compared to conventional valve guides.
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