Chrysler laser 1990 Technical Information Manual page 162

adiustina screw
Throttle valve
Coolant temperature "C (OF)
Coolant temperature "C VF)
Coolant temperature "C VF)
Position Control
When the steering wheel is turned or the air
conditioner switch is operated while idling, the
engine load changes and consequently the idle
speed changes sharply. Therefore, immediately
after detection of such a load signal, the engine
control unit activates the idle speed control servo to
SYSTEM
(2) When the engine coolant temperature is low, the fast idle
Feedback Control at Idle
(1) Basic target idle speed
The basic target idle' speed is preset as a map value
optimized according to the engine coolant temperature.
This speed is maintained to ensure stabilized idle speed.
Power steering oil
switch
pressure
Inhibitor
switch
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"D" Power
steering
range
air valve together with the idle speed control serv
operated to supply an adequate volume of bypass ,.r
according to the engine coolant temperature.
When the engine coolant temperature is high with the air
conditioner switch in the ON position, the idle speed is set
higher than the basic idle speed.
achieve the target position, thus controlling the
bypass air volume and suppressing engine speed
changes. The engine control unit also activates the
idle speed control servo to achieve the optimum
target position while cranking, driving and decelerat-
ing, according to the operating conditions.
Dash pot
I
Idle speed
control servo
I
E n g i n e
I
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