Lubrication system of an internal combustion engine
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United States of America Patent
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Jun 10, 2014
Grant Date -
Mar 22, 2012
app pub date -
Mar 26, 2009
filing date -
Mar 26, 2009
priority date (Note) -
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Abstract
A technique which is capable of suppressing a deterioration of lubricating oil used in an internal combustion engine in a more suitable manner. The present invention is provided with an oil pump, oil pressure control means to control the oil pressure of the oil pump, and a determination means to determine whether the degree of deterioration of the lubricating oil is higher than a predetermined level. When it is determined that the degree of deterioration of the lubricating oil is higher than the predetermined level, the oil pressure of the oil pump is made lower, by means of the oil pressure control means, than that at the time when the degree of deterioration of the lubricating oil is equal to or lower than the predetermined level.
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