ELECTRIC AT OIL PUMP OUTLINE [FS5A-EL]


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Note
•  An electric AT oil pump is driven based on the signal from the PCM via the electric AT oil pump driver. For the electric AT oil pump control, refer to Section 01. (See i-stop CONTROL OPERATION [MZR 2.0 DISI i-stop].)

Function

•  The electronic control system trochoid pump has been adopted to ensure the line pressure while i-stop is operating.
•  After the engine is restarted, smooth startability has been realized by ensuring the line pressure while i-stop is operating.

Construction

•  The electric AT oil pump consists of the following component parts:
―  Electric motor: drives the oil pump.
―  Oil pump: inducts ATF from the oil pan and pumps it to the pressure regulator valve.
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Operation


i-stop is stopped (engine is running)

•  The electric AT oil pump stops while i-stop is operating, however, the oil pump is driven by the engine. The hydraulic pressure generated by the oil pump operates the pressure regulator valve, however, the electric AT oil pump is not operated by the check valve being blocked.
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i-stop is operating (engine is stopped)

•  The oil pump stops while i-stop is operating because the engine stops, however, the electric AT oil pump is driven instead. The hydraulic pressure generated by the electric AT oil pump operates the pressure regulator valve via the check valve.
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