Page 199 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

MODULE 12: Emission Control System

EXERCISE 12.1: Checking exhaust gas in petrol engine

using exhaust gas analyser

Objectives

At the end of this exercise you shall be able to
• use of 4/5 gas analyser
• installation of 4/5 gas analyser
• setup of instrument for measuring emission parameter
• perform leak test
• measure CO, HC, CO 2 , O2 , X, AFR/NOx
• examine the result.

Requirements

Tools/Instruments Equipments/Machines
• Trainee’s tool kit - 1 No. • Petrol Engine vehicle - 1 No.
• 4/5 gas analyser - 1 No.
• Screw Driver - 1 No.

Procedure

TASK 1: Installation

Note: Safety instructions
1 Verify the use of power source AC 220V only before prior use.
2 This procedure applies to the product of 4/5 gas analyser (Fig 1).
3 It should not be used in polluted environment
4 It should be used less than 1000m in height and less than 85% in relative humidity
5 The emitted gas normally has co which may lead to fatal damage to a human body. Hence it must
be used in well-ventilated area.
6 The probe gets too hot by exhaust gases, so, be careful while inserting or removing from the
exhaust pipe
7 It should be set up atleast 25 cm from the ground surface.

• Fit end of the probe hose into the measuring probe and the other end of the hose into the gas inlet in the rear
of the analyzer (Fig 2). If the fitting condition is not good and the air comes into flow from outside, it may yield
an incorrect measured value. Therefore, please carefully verify the fitting condition before use.
• Turnoff the power switch and then connect the power cable to the power socket located in the rear of the
analyzer
• Verify the fitting conditions of measuring probe filter and various filters located in the rear of the analyzer.
Change the filters if necessary

• Verify again the connection status of the analyzer and then turn on the power switch.

182