Chrysler laser 1990 Technical Information Manual page 145

GENERAL DESCRIPTION
Air flow sensor
Barometric Dressure sensor
Coolant temr3erature sensor
Top dead center sensor
ignition switch
The engine control unit activates the injectors and
controls the fuel injection rate in response. to the
sensor information so that the optimum air/fuel ratio
can be maintained at all times under ever-changing
engine operating conditions. The fuel injection rate
is determined by the injection frequency corres-
ponding to the engine speed, and by the injection
duration corresponding to the intake air volume.
FUEL SYSTEM
I
Fuel is injected into each cylinder sequentially, and
takes place once for each cylinder every two
revolutions of the crankshaft. The injection duration
(namely the injector activation time) is the basic
activation time determined according to the intake
air volume of each cylinder, with corrections applied
according to the intake air temperature, engine
coolant temperature and other factors.