Oil bypass device, and engine fitted with such a device
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United States of America Patent
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Feb 8, 2011
Grant Date -
Apr 10, 2008
app pub date -
Oct 9, 2007
filing date -
Oct 9, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
According to the invention, the filter is fixed to the engine block by screwing it to an attached connecting sleeve. The connecting sleeve contains a bypass valve, in the form of a tubular piston sliding in a through-passage and pushed against an intermediate shoulder by a spring. By sliding, the piston opens or closes a radial passage establishing direct communication between the inlet passage and the through-passage of the device. If the filter element of the filter is clogged, the pressure rise in the inlet passage causes the piston to move and the radial passage to open to reduce the pressure rise and ensure a satisfactory flow of oil. This reduces pressure rises upstream of the filter and ensures sufficient lubrication of the engine even in the case of clogging of the filter.
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