Specifications

ELECTRONIC FUEL INJECTION (EFI)
TO DISTRIBUTOR
STEPPER MOTOR
DESCRIPTION
The above illustration shows the throttle body assembly
attached
to the intake manifold.
An electronic control unit (BCU) controls the fuel injection
and throttle
actuator.
The ECU is supplied with electrical signals it interprets as
engine operating conditions from sensors that monitor intake
air temperature, engine coolant temperature, map sensor
(intake manifold absolute pressure), engine
rpm, battery
voltage and distributor cam signal.
The
ECU interprets this information to determine the
appropriate injector pulse rate
and throttle opening position.
A high pressure
fuel pump supplies fuel to the area around
the injector and regulator maintains the fuel pressure in that
area
at 35 - 40 PSI.
COOLANT RETURN
FUEL PRESSURE REGULATOR
FUEL RETURN
AIR HEATER
PCVVALVE
AIR SCREEN!
FLAME ARRESTOR
The injector is a solenoid operated pintle valve that meters
fuel into the intake manifold depending on engine operating
conditions and generator amperage load
as determined by the
ECU.
Air flow into the intake manifold is controlled by the ECU
operation of the throttle plate via the actuator. Throttle plate
positioning
for proper air flow into the engine is
accomplished through the ECU interpretation of engine
operating conditions. The
Schrader valve is used to
monitorlcheck fuel pressure around the fuel injector.
Engines & Generators
16