Pajero II Technical Information Manual 1991 · PYJE9002 PAJERO 91 TIM 1 · страница 25 из 71 · Открыть оригинал PDF ↗

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SMOOTH FLOW TYPEAIR CLEANER

The air cleaner case isresinmade rectangular
shapewhichisadaptedtothenewpressure
sensitive type airflowsensorIt assures smooth

intake airflowand also features easy removal and
installation ofthe filter element.

SERVOVALVE POSITION SENSOR

As spur gear(see figure) is rotated by the DC
motor, the servo valve extends or retractsaccording
to themotor' srotating direction_Theservo valve
position sensor is built into the idle speed control
(ISC) servo and it detects the rotation of spur gear A
(change of the servo valve position) via the rotation
of spur gearB (see figure) and convertsit into
pulse signal, which is sent to the engine control unit:
The servo valve position sensor outputs one pulse
signal (Signal 1) each time spur gearB completes
onerotation.TodetectspurgearB's rotating
direction (or t0 determine whether the servo valve is
extendingor retracting)alsooutputsanother
pulse signal (Signal 2) which is same in waveform as
Signalbut is 909 out of phase from Signal
When the ignitionswitch turned ON,the engine
control unit causes the servo valve to move once to
the fully closed position (where the valve contacts
the stopper) for initializing and then it computes the
servo valve position by detecting Signalsand 2
The valve position is calculated with the assumption
that the servo valve fully closed position is step
and the fully open position is step 96.

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