ENGINE OIL FEEDING DEVICE
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United States of America Patent
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app pub date -
Jun 27, 2017
filing date -
Jul 20, 2016
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Abstract
An engine oil feeding device is provided, which includes a variable-displacement oil pump having an operating chamber and a control oil-pressure chamber, and for changing a capacity of the operating chamber according to a pressure of the control oil-pressure chamber to change its discharging amount, an oil supply channel communicating with the operating chamber and coupled to an oil fed part, and an oil filter. The oil supply channel includes a pump downstream oil channel connecting the operating chamber with the filter and a control oil channel branched from the pump downstream oil channel and coupled to the control oil-pressure chamber. The device also includes a control valve provided in the control oil channel. A starting control is performed in which the valve opening is set larger than a predetermined rate before the pump starts driving and set smaller than the predetermined rate after the pump starts driving.
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