TM 5-4310-372-14The compression cycle starts with the low pressure piston A at thetop of its stroke.When the piston moves down,it draws air through the air filter Ba n d i n l e t v a l v e C i n t o t h e c y l i n d e r.T h e a i r f i l t e r k e e p s d i rtout of the compressor.On the upstroke,inlet C closes and the piston A pushes air outthrough the exhaust valve D and into the intercooler E.Compressing the air increases its temperature.The intercooler Ed i s s i p a t essome of that heat to the surrounding atmosphere beforep a s s i n g t h e c o m p r e s s e d a i r o n t o t h e h i g h p r e s s u r e s t a g e f o rfurther compression.The high pressure stage works in the same way as the low pressurestage does, except that the high pressure piston goes up when thelow pressure piston goes down.This way, the low pressure pistoni s d r a w i n g a i rin when the high pressure piston is pushing airo u t.Compressed air f r o m t h e h i g h p r e s s u r e s t a g e g o e s t h r o u g h t hec a p a c i t y c o n t r o l s y s t e m t o t h e a i r r e c e i v e r t a n k.The capacityc o n t r o l s y s t e m r e g u l a t e s t h e l o a d i n g o f t h e a i r c o m p r e s s o r a ndengine speed.1-8
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