Page 90 - Mechanic Diesel - TT

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.

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CITS : Automotive - Mechanic Diesel - Lesson 19 - 24