OIL PRESSURE CONTROL OPERATION [13B-MSP]

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Operation

Engine start mode

•  This mode opens the passage between the OCV and metering oil pump to feed oil into the metering oil pump at an early stage. After oil-feed into the metering oil pump is detected based on the input signals from the oil pressure sensor, the mode changes to the feedback mode.

Feedback mode

•  The PCM controls the OCV target current so that the actual oil pressure in the metering oil pump is close to the target value determined according to the engine operation conditions.

Cleaning mode

•  If any of the following conditions are met, this mode is executed to remove foreign material in the OCV oil passages:

―  Engine start mode is completed.

―  The oil pressure input from the oil pressure sensor remains at a certain value or more after a specified time has elapsed since the engine was started.

Operation

•  The OCV alternately controls the target current between low and high levels at certain intervals. After repeating this operation several times, foreign material that has penetrated the OCV is removed and the cleaning mode is completed.

―  The oil pressure input from the oil pressure sensor remains at a certain value or less after a specified time has elapsed since the engine was started.

Operation

•  Because there may be an oil leakage concern from the pipes, the passage between the OCV and metering oil pump is closed so that oil-feed into the metering oil pump stops.

Periodic cleaning mode

•  This mode performs at specified time intervals to remove foreign material in the OCV oil passages. (except during high engine speed, high engine load)

Operation

•  The OCV controls the target current on the lower side for a specified period of time. After executing this operation one time, foreign material penetrating the OCV is removed and the periodic cleaning mode is completed.