Mazda 2009 RX-8, Особенности сервиса

Страница: 46 / 299

LUBRICATION [13B-MSP]
01-11–8
Operation
!
The PCM sends drive signals to the metering oil pump driver according to the engine operation conditions. The
metering oil pump driver receives the drive signals from the PCM, and switches the inner ground to supply
battery voltage to the metering oil pumps No.1 and No.2.
!
When the battery voltage is supplied by the metering oil pump driver, the main and sub plungers in the
metering oil pump move. The plungers return to the original position by spring force when the battery voltage is
not supplied.
!
When the battery voltage is not supplied, oil is suctioned to the space which is made by the plunger pulled by
spring force. At this point (suction stage), oil is not supplied to the oil nozzle because the check valve is closed.
When the battery voltage is supplied, the plunger moves (pops out) and pushes out the suctioned oil to the oil
nozzle side. Because the oil is pushed into the oil tube, the oil pressure in the oil tube increases, then the check
valve in the oil nozzle is open and the oil is discharged to the housing. (discharge stage)
In this way, the plunger moves within a certain distance and oil is suctioned and discharged repeatedly.
!
For ON/OFF control of the battery voltage, refer to CONTROL SYSTEM, METERING OIL PUMP CONTROL.
(See 01-40-20 METERING OIL PUMP CONTROL OUTLINE [13B-MSP].)
End Of Sie
NG: OIL CONTROL VALVE (OCV)
MAIN
PLUNGER
FROM OCV
OIL FLOW
PLUNGER MOVEMENT
OIL
SPACE
SUB PLUNGER
BATTERY VOLTAGE OFF
(SUCTION STAGE)
BATTERY VOLTAGE ON
(DISCHARGE STAGE)
CHECK VALVE CLOSED
CHECK VALVE OPEN
MOVE
SUB PLUNGER
SPRING
OIL TUBE
INNER
PRESSURE
INCREASED
OIL NOZZLE
CHECK VALVE
CLOSED
CHECK VALVE
OPEN
OIL DISCHARGE
OIL TUBE
ar8uun00000354