Variable oil pump diagnostic
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United States of America Patent
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Jun 3, 2014
Grant Date -
Aug 1, 2013
app pub date -
Jan 31, 2012
filing date -
Jan 31, 2012
priority date (Note) -
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Abstract
Embodiments for indicating degradation of a piston-cooling jet system are provided. In one example, an engine method comprises indicating degradation of a piston-cooling jet system in response to a relationship between engine speed and oil pressure at maximum oil pump displacement conditions. In this way, engine operation may be adjusted in response to an indicated degradation.
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