Page 90 - Mechanic Diesel - TT
P. 90

MECHANIC DIESEL - CITS


                                          MODULE 3 : Intake and exhaust systems


           LESSON 25 - 28:    Study about intake system components

                                          such  as  air  cleaner,  different  types  of
                                          turbo charger, super charger, throttle

                                          body, intake manifold etc


            Objectives


           At the end of this lesson you shall be able to
           •  explain Intake System components such as air cleaner
           •   demonstrate Turbo charger and super charger
           •  explain Throttle body and Inlet Manifold.


           Study about air cleaner
           Air cleaner and air cooler
           Atmospheric air consists of a large quantity of dirt and dust.  Uncleaned air will cause faster wear of and damage
           to the engine parts, so air is filtered before entering inside the cylinder bore.
           Purpose of air cleaner
           •  It cleans the intake air.
           •   It reduces the noise of the intake air.
           •   It acts as a flame arrester during engine backfire.
           Location
           It is mounted on the top of the air inlet manifold. Types Wet-type (Fig 1).Dry-type (Fig 2) Wet type air cleaner The
           atmospheric air enters the air cleaner through the side passage (1) and strikes on the surface of the oil (2). Heavy
           dust particles are absorbed by the oil.  The partially filtered air, along with oil particles, moves upward through the
           filter element (3).  Fine particles and oil particles are collected by the filtering element (3). Cleaned air then passes
           through the passage to the inlet manifold.




























           Dry type air cleaner
           In this type of air cleaner, a specially treated paper element is used to filter the intake air.



                                                           77
 CITS : Automotive - Mechanic Diesel - Lesson 19 - 24
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