Mazda 2009 RX-8, Особенности сервиса

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CONTROL SYSTEM [13B-MSP]
01-40–20
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METERING OIL PUMP CONTROL OUTLINE [13B-MSP]
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x
The PCM operates metering oil pumps No.1 and No.2 by operating the metering oil pump driver according to
the engine operation conditions.
x
The metering oil pump driver receives drive signals from the PCM to switch the internal ground and supply
battery voltage to metering oil pumps No.1 and No.2.
x
The PCM determines the engine operation conditions based on the signals from the input parts and controls
the metering oil pump driver at the optimal timing to operate the metering oil pump. For the construction/
operation of metering oil pumps No.1 and No.2, refer to “LUBRICATION SYSTEM, METERING OIL PUMP,
CONSTRUCTION/OPERATION. (See 01-11-5 METERING OIL PUMPCONSTRUCTION/OPERATION [13B-
MSP].)
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METERING OIL PUMP CONTROL BLOCK DIAGRAM [13B-MSP]
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METERING OIL PUMP CONTROL OPERATION [13B-MSP]
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Outline
x
The PCM moves the plunger in metering oil pumps No.1 and No.2 to discharge the engine oil by controlling the
metering oil pump driver. Two types of metering oil pumps are utilized separately and the discharge amount is
adjusted based on the stroke intervals of the plunger to realize precise control of the flow amount according to
engine demand.
Excessive speed fuel cut
control
Prevents overheating of the engine.
x
When ECT is less than 40
q
C {104
q
F}: the
engine speed is 5,000 rpm or more.
Standard power
x
When ECT is 40
q
C {104
q
F} or more: the
engine speed is 6,500 rpm or more.
x
When engine speed is 7,500 rpm or more.
High power
x
When ECT is 40
q
C {104
q
F} or more: the
engine speed is 7,000 rpm or more.
x
When engine speed is 9,000 rpm or more.
Control name Purpose Fuel cut condition
PCM
ECT SENSOR
IAT SENSOR
METERING OIL PUMP DRIVER
ECCENTRIC SHAFT POSITION
SENSOR
IGNITION SWITCH
BARO SENSOR
(BUILT INTO PCM)
BATTERY
OIL PRESSURE SENSOR
METERING OIL PUMP NO.1, NO.2
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