Mitsubishi 1993 3000GT, Technical Information Manual

Page: 83 / 216

Weight and
piezoelectric
element
Amplifier circuit
12F0048
Steering Wheel Angular Velocity Sensor
The steering wheel angular velocity sensor is made up of 2 photo
interrupters and a slit plate. The photo interrupters are mounted
on the column switch and the slit plate is mounted on the steering
shaft. The slit plate rotates between the photo interrupters so the
light from the LED of photo interrupter is interrupted and passed
through and that is changed by the photo diode to an electric
signal according to the steering wheel angular velocity.
Furthermore, the steering turning direction can also be detected
by the divergence in each 1/4 cycle of the output wave of the
photo interrupters.
The inside of the G-sensor are made up of a
piezoelectric ceramic and a weight. The weight adds
extra force on the piezoelectric ceramic depending on
the up/down vibration and the G-sensor outputs an
electric signal according to the vibration due to the
piezoelectric effect.
12F0003
DRIVE-CONTROL COMPONENTS -
Electronic Control Suspension (ECS)
3-11
STRUCTURE AND OPERATION
SENSOR
ECS Switch
The ECS switch is a return type switch mounted on the meter
bezel.
When the battery is connected and the ignition switch turned ON,
it starts in the TOUR mode. Then, it changes between the TOUR
and SPORT mode each time the mode changeover switch is
pressed.
G-Sensor
The G-sensor detects the up/down vibration of the
vehicle and outputs an electric signal. This sensor is
used for controlling a comfortable ride, and it is
mounted under the front seat (LH) where it can
accurately detect the up/down vibration felt
by
the
driver.
G-sensor output characteristics