Mitsubishi ECLIPSE Technical Information Manual

ENGINE <TURBO> - Control System I-73
SENSORS NllBKQ1AA
ii
GENERATOR FR TERMINAL
L
x Trio diode
Generator
L - - - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Voltage regulator
I
1 .
Terminal FR of the generator inputs the ON/OFF
state of the generator field coil to the engine control
module. In response to this signal, the engine control
module senses the generator output current, and
drives the ISC servo according to the output current
(electric load). This prevents a change in idling
speed that may otherwise be caused by the electric
load.
* The generator generates power when the power
transistor in the voltage regulator is caused to
be ON to supply a current (field current) to the
field coil. When the power transistor is caused
to be OFF, the power generated by the generator
rapidly decreases. The size of the generator
output current, therefore, depends on the ratio
that the power transistor is ON (ON duty). The
Engine control module
1 FU0887
voltage at terminal FR is low when the power
transistor is ON, and high when the power tran-
sistor is OFF. Therefore, the ON duty of the
power transistor ini the voltage regulator or the
generator output current can be sensed by cal-
culating the ratio that the voltage at terminal
FR is low.
When the generator output voltage reaches the
regulated voltage (approx. 14.4V), the voltage
regulator switches the power transistor from
ON to OFF. When ithe output voltage falls below
the regulated voltage, the voltage regulator
switches the power transistor from OFF to ON.
In this manner, the generator output voltage
is maintained constant.

Mitsubishi ECLIPSE Specifications

General

Brand	Mitsubishi
Model	ECLIPSE
Category	Automobile
Language	English