Oil supply control device of engine

An oil supply control device for an engine, comprising:

• an oil pump of which an oil discharge amount is variable;
• a hydraulic actuating device which is activated in response to a pressure of oil supplied from the oil pump;
• a hydraulic pressure sensor which is disposed in an oil supply passage connecting the oil pump and the hydraulic actuating device, and detects a hydraulic pressure;
• a viscosity characteristics detecting device which detects viscosity characteristics of oil circulating within the engine by the oil pump;
• an adjusting device which adjusts the oil discharge amount from the oil pump according to an input control value to adjust the hydraulic pressure;
• a memory which stores first master data constituted by the control value which is determined in advance depending on viscosity characteristics of the oil depending on an operating state of the engine at a predetermined hydraulic pressure value;
• a hydraulic controller which outputs the control value to the adjusting device to control the adjusting device to cause a detected hydraulic pressure detected by the hydraulic pressure sensor to coincide with a target hydraulic pressure which is set depending on the operating state of the engine;
• and
• a determination portion which compares an output control value output from the hydraulic controller to the adjusting device when the detected hydraulic pressure coincides with the predetermined hydraulic pressure value set to the target hydraulic pressure, and the control value of the first master data stored in the memory, to determine whether or not a first difference between the output control value and the control value of the first master data lies within a predetermined allowable range, wherein
• the hydraulic controller starts to control the adjusting device with use of the control value of the first master data, when the first difference lies within the allowable range, and starts to control the adjusting device with use of the control value of second master data different from the first master data, when the first difference does not lie within the allowable range, the control value of the second master data causing the first difference to lie within the allowable range, and
• the hydraulic controller updates the control value of the first master data stored in the memory with use of the first difference, when the first difference lies within the allowable range.

An oil supply control device for an engine, comprising:

• an oil pump of which an oil discharge amount is variable;
• a hydraulic actuating device which is activated in response to a pressure of oil supplied from the oil pump;
• a hydraulic pressure sensor which is disposed in an oil supply passage connecting the oil pump and the hydraulic actuating device, and detects a hydraulic pressure;
• a viscosity characteristics detecting device which detects viscosity characteristics of oil circulating within the engine by the oil pump;
• an adjusting device which adjusts the oil discharge amount from the oil pump according to an input control value to adjust the hydraulic pressure;
• a memory which stores first master data constituted by the control value which is determined in advance depending on viscosity characteristics of the oil depending on an operating state of the engine at a predetermined hydraulic pressure value;
• a hydraulic controller which outputs the control value to the adjusting device to control the adjusting device to cause a detected hydraulic pressure detected by the hydraulic pressure sensor to coincide with a target hydraulic pressure which is set depending on the operating state of the engine;
• and
• a determination portion which compares an output control value output from the hydraulic controller to the adjusting device when the detected hydraulic pressure coincides with the predetermined hydraulic pressure value set to the target hydraulic pressure, and the control value of the first master data stored in the memory, to determine whether or not a first difference between the output control value and the control value of the first master data lies within a predetermined allowable range, wherein
• the hydraulic controller starts to control the adjusting device with use of the control value of the first master data, when the first difference lies within the allowable range, and starts to control the adjusting device with use of the control value of second master data different from the first master data, when the first difference does not lie within the allowable range, the control value of the second master data causing the first difference to lie within the allowable range,
• the oil pump includes a capacity variable oil pump of which a discharge capacity is variable,
• the adjusting device includes an oil control valve which adjusts a hydraulic pressure applied to the capacity variable oil pump, to adjust an oil discharge amount from the capacity variable oil pump, and
• the hydraulic actuating device includes a valve stopping device which releases, by a hydraulic pressure, a lock mechanism for holding a support mechanism that supports a swing arm of an intake valve or an exhaust valve to be activated by a cam of a camshaft, to stop activation of the intake valve or the exhaust valve to open.