MAINTENANCE OF THE M88A1 - OD1672 - LESSON 2/TASK 1
FIGURE 19. MANIFOLD AIR INDUCTION
HEATER SYSTEM.
fuel is burned in the intake manifold (5) by the ignition of the heater
spark plug (6) which flame-heats the incoming air.
The flame-heated air and the products of combustion are fed directly into
the cylinders.
The purge pump line (7) connects to a check and pressure
relief valve (8) and pressure regulator in the main engine. The check valve
prevents purged fuel from returning to the tank or back into the purge inlet
line. The relief valve (8) assures the necessary fuel pressure to operate
the flame-heater spray nozzles.
An inlet solenoid (2) and return fuel
solenoid (9) closes the flame-heater fuel lines when the flame-heater switch
is OFF. The
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