Development of exhaust gas leak detector tool by using compress air and smoke method

Yahaya, Khairol Akmal (2022) Development of exhaust gas leak detector tool by using compress air and smoke method. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This project presents the design of exhaust gas leak detector tools. The difficulty to discover exhaust gas leak is more complex compared to lubricant leak. Leak of lubricant can be discovered by verifying the moisture in the leak area compared with exhaust gas has no smell, which means a small leak would be impossible to detect. The main purpose is to design a detector tool by using air and smoke method. The objectives of this project are (1) to design a low-cost tool to detect exhaust gas leak, (2) to fabricate a safety tool to detect the exhaust gas that is efficient, convenient and safe and (3) to analyze the effectiveness of this tool for mechanic to find the location of exhaust gas leak area. Exhaust Gas Leak Detector (ExGLD) is a tool that uses blower fan motor to create compress air from the outside of the tool to suction flowing into the ExGLD. The compress air pushes the smoke into the exhaust system. The smoke created from the combination of fire cracker smoke. The smoke and compress air work together in this process and eventually, the smoke will come out from the leakage area in the exhaust pipe if there is leakage detected. Leaks are most commonly seen in the exhaust pipe, muffler, manifold, and catalytic converter. The dimension of the ExGLD was done by drafting drawing from CATIA V5. The main part of the ExGLD is smoker box that dimension of the length is 400 mm, the height of the smoker box is 150 mm and the width of the box is 150 mm. The ExGLD designed compact, lightweight and easy to bring to anywhere. Acrylic sheet was used for the smoker box wall. Based on the project, the new tools have created to develop the gas leak detector for new era that can help technician or mechanic to find the exactly location of exhaust leakage. The blower speed reading for speed 1 is 11.95m/s, speed 2 is 15.68m/s and speed 3 is 18.85m/s. The blower speed reading was used to collect data for detection leakage size and the distance. The lowest reading of anemometer at 2 mm size of leakage hole size. The higher reading of anemometer is at 5 mm leakage hole size. This result show that by using blower speed 1, 2 and 3 at the Exhaust Gas Leak Detetctor (ExGLD) tool the leakage of 5 mm size can be easily see compare to leakage 2 mm. As the result the pressure of blower speed that comes out from leakage hole increase when the leakage size increase. Besides that, the length 1.2meter and 2.4meter does not affect the quantity of the compress air that coming out through the leakage hole. The velocity or the speed of air that coming out from the leakage hole is depend on the size of the leakage. Therefore, the ExGLD tool function to find the exactly location of the leakage hole area at the exhaust system.

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