International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 03 | Mar 2024
p-ISSN: 2395-0072
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Analysis of Failure and Reliability of Spark Plug using Failure Mode and Effect Analysis (FMEA) Process Ajay Haribhau Jadhav1 Professor, Dept. of Mechanical Engineering, SME'S Mahavir Institute Of Polytechnic , Nashik, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------output terminal of an ignition coil or magneto by highly Abstract
insulated wire. The metal housing of the spark plug is screwed into the engine cylinder head and thus grounded. The central electrode is connected to the combustion chamber through a porcelain insulator, and one or more gaps are formed between the inner end of the central electrode and one or more laterally selected protrusions or structures, usually connected to the inner end of the threaded shell and designated the side, or ground electrode.
A Spark Plug is used for initiation of combustion(Ignition) by passing a high temperature fire into the combustion chamber containing a mixture of air and fuel. The most commonly used fuels are petrol, compressed natural gas, liquefied petroleum gas, ethanol and kerosene. There are many different types of spark plug designs available on the market today. Understanding the difference between them can help your engine run smoothly and efficiently. Failure Mode and Effect Analysis is a tool that can be used to identify the effects or consequences of product or process failure and eliminate or reduce the failure. This article introduces the use of FMEA to improve the reliability of the spark plug to ensure smooth operation of the machine and thus increase profits in the automotive industry. Severity rating, Occurrence rating, Detection rating and Risk Priority Number (RPN) are some considerations. Here FMEA is applied to ensure the operation of spark plug and defects are detected. This function ensures efficient operation of the vehicle by acting as a guide to both prevent failure and increase the reliability of the spark plug.
Spark plugs may also be used for other purposes in Saab Direct Ignition when they are unable to fire. The spark is used to measure ionization in the cylinder. The existing ionic current measurement is used for replacing the cam level sensor, knock sensor, and misfire measurement function.
Key Words: FMEA, Spark plug, Mode Failure, Reliability, Severity rating, Occurrence rating, Detection rating, Risk Priority Number.
1.INTRODUCTION There are many types of spark plug designs on the market today. Understanding the difference between them can help your engine run correctly and efficiently. [1] The high pressure cylinder directly supplies the working material in the combustion chamber and thus provides an important insight into the management and control of engine.[2] A spark plug (sometimes known as sparking plug in British English and also known as a plug ) is a device that delivers electrical current from an ignition system into the combustion chamber of a spark ignition engine to ignite the compressed air/fuel mixture by means of an electric spark while maintaing the combustion pressure in the engine.
Fig 1: Spark plug design Spark plugs can also be used in other applications, such as furnaces where a hot air/fuel mixture must be ignited. In this case they are sometimes called flame igniters. Spark plugs are constantly exposed to chemical, thermal, physical and electrical attack by corrosive gases at temperatures of 4,500 degrees Fahrenheit, crushing pressures of 2,000 pounds per square inch (PSI) and output voltages of up to 18,000 volts. This incredible attack on the hood of the car occurs twelve times per second and more than a million times in a day during driving.
The spark plug has a wire housing that is electrically isolated from a central electrode by a porcelain insulator. The central electrode may have a resistor connected to the
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