Infiniti Q45 (FY33). Manual — part 431
System Components
SFA001C
SFA993B
Component Description
CONTROL UNIT
The control unit calculates the direction and the speed of the
vehicle based on input signals from each sensor, and controls
actuators (step motors) for optimum damping force of shock
absorbers. In case of the trouble in the electric system, the control
unit controls actuators (step motors) for constant damping force
according to signals stored in control unit.
SFA994B
STEERING ANGLE SENSOR
Three optical, non-contact type sensors are used to send signals
of the steering direction, neutral position, and lock angle to the
control unit.
Steering angle sensors consist of LEDs, phototransistors which
transform light to electric signals, and slit sheets which rotate with
the steering wheel. The sensors receive light through slit sheets
which rotate and shade light, turning ON/OFF the phototransistors.
GI
MA
EM
LC
EC
FE
AT
PD
RA
BR
ST
RS
BT
HA
EL
IDX
ACTIVE DAMPER SUSPENSION
FA-23
SFA995B
SFA002C
VERTICAL G SENSOR
The vertical G sensor detects the up/down accelerations of the
vehicle, and sends signals to the control unit.
The vertical G sensor consists of semiconductor piezo elements for
the detecting element. The sensor detects accelerations as distor-
tion amount and transforms the amount to a voltage signal through
the amplification circuit.
CAUTION:
Because the sensor is susceptible to mechanical impact, be
sure to handle it with care.
SFA997B
SHOCK ABSORBER ACTUATOR
Shock absorber actuators are installed on the upper part of shock
absorbers to control the damping force of shock absorbers by out-
put signals from the control unit.
The motor operating angle is about 70°. The shock absorber actua-
tor instantly controls 140 patterns of damping force.
ACTIVE DAMPER SUSPENSION
Component Description (Cont’d)
FA-24
Active Damper Suspension Configuration
SFA003C
GI
MA
EM
LC
EC
FE
AT
PD
RA
BR
ST
RS
BT
HA
EL
IDX
ACTIVE DAMPER SUSPENSION
FA-25
Active Damper
SFA972B
ACTIVE DAMPER SUSPENSION
FA-26
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