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Fuel Shutoff Solenoid Wiring Diagram
Valve System Components

TM-5-3895-383-24
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TM 5-3895-383-24 There is one intake and one exhaust valve for each cylinder. Make  reference  to  Valve  System  Components.    The  intake valve opens when the piston moves down on the inlet stroke. Compressed   air   from   the   inlet   chamber   is   pulled   into   the cylinder. The intake valve closes and the piston starts to move up on the compression  stroke.    When  the  piston  is  near  the  top  of  the compression stroke, fuel is injected into the cylinder.  The fuel mixes   with   the   air   and   combustion   starts.      The   force   of combustion   pushes   the   piston   down   on   the   power   stoke. When the piston moves up again it is on the exhaust stroke. The exhaust valve opens and the exhaust gases are pushed through  the  exhaust  port  into  exhaust  manifold  (4).    After  the piston makes the exhaust stroke, the exhaust valve doses and the cycle (inlet, compression, power, exhaust) starts again. Exhaust  gases  from  the  exhaust  manifold  go  into  the  turbine side  of  the  turbocharger  (5)  and  cause  turbine  wheel  (9)  to turn.  The turbine wheel is connected to the shaft that drives compressor  wheel  (8).    The  exhaust  gases  then  go  out  the exhaust outlet (10). Turbocharger Turbocharger Cross Section (1)   Exhaust   outlet.      (2)   Exhaust   bypass   port.      (3)   Turbine wheel.  (4) Oil inlet port.  (5) Compressor wheel.  (6) Air inlet. (7) Bearings.  (8) Oil outlet port. Waste Gate Turbocharger (if equipped) (9) Actuating lever.  (10) Case.  (11) Line (boost pressure). The  turbocharger  is  mounted  to  the  exhaust  manifold  of  the engine.    All  the  exhaust  gases  go  through  the  turbocharger. The exhaust gases go into exhaust inlet of the turbine housing and  push  the  blades  of  turbine  wheel  (3).    This  causes  the turbine  wheel  and  compressor  wheel  to  turn  at  speeds  up  to 100 000 rpm. Clean air from the air cleaner is pulled through the compressor housing air inlet (6) by rotation of compressor wheel (5).  The action of the compressor wheel blades causes a compression and heating of the inlet air.  The hot compressed air from the turbocharger is then cooled by the aftercooler before going to the inlet manifold of the engine.  This compression gives the engine more power because it makes it possible for the engine to burn additional fuel with greater efficiency. Maximum  rpm  of  the  turbocharger  is  controlled  by  the  fuel setting, the high idle rpm setting and the height above sea level at which the engine is operated. When  the  engine  is  operating  under  low  boost  conditions  a spring pushes against a diaphragm in canister (10) and moves actuating lever (9) to close the wastegate valve which will allow the turbocharger to operate at maximum performance. As   the   boost   pressure   increases   against   the   diaphragm   in canister (10), the wastegate valve is opened and the rpm of the turbocharger  is  limited  by  bypassing  a  portion  of  the  exhaust gases around the turbine wheel of the turbocharger. NOTE: The   wastegate   turbocharger   is   preset   at   the factory and no adjustments can be made. 6-16







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