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Ignition system by arshed mehmood

Sep 13, 2014

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Group Members Arshed Mehmood 08-ME-05 Iftikhar Bashir Butt 08-ME-06 Waseem Rasheed 08-ME-07 Umer Fraz Khan 08-ME-08 Presentation Topic Ignition System( For spark ignition(S.I) &Compression ignition (C.I) )What is Ignition SystemThe ignition system ignites the air/fuel mixture inside the cylinders, or combustion chambers. All internal combustion engines require an ignition system to work. The entire system consists of two electrical systems. One is a low voltage circuit induced by the voltage supplied by the BATTERY. The other electrical system is the high voltage circuit. This circuit provides the necessary voltage to create a spark at the SPARK PLUG.

Group # 02Ignition system for S.I

Components of Ignition SystemIgnition coilDistributorDistributor capRotorPlug wires Spark plugsBatteryIgnition CoilThe ignition coil takes the weak battery power and turns it into a spark that is powerful enough to ignite your fuel's vapor.

High voltage coil cableResistance wirePrimary windingSecondary windingDistributor

The distributor is the nerve center of the mechanical ignition system and has two tasks to perform. First, it is responsible for triggering the ignition coil to generate a spark at the precise instant that it is required (which varies depending how fast the engine is turning and how much load it is under). Second, the distributor is responsible for directing that spark to the proper cylinder (which is why it is called a distributor).Typical Four cylinder distributor The distributor is responsible for directing that spark to the proper cylinder, as shown in the video.

Distributor Cap, and Rotor

The distributor cap and rotor are two essential pieces that distribute electrical current to the spark plugs. The distributor cap connects to the spark plugs directly using a spark plug wire. The number of plug wires connected depends on the amount of spark plugs that are in the engine. For example, an four cylinder engine will have four plug wires. The rotor is designed to spin inside of the distributor cap, just missing the terminals inside the cap.

Plug wires

These cables are designed to handle 20,000 to more than 50,000 volts, enough voltage to toss you across the room if you were to be exposed to it. The job of the spark plug wires is to get that enormous power to the spark plug without leaking out. Spark plug wires have to endure the heat of a running engine as well as the extreme changes in the weather.

Spark PlugThe ignition system's sole reason for being is to service the spark plug. It must provide sufficient voltage to jump the gap at the tip of the spark plug and do it at the exact right time, reliably on the order of thousands of times per minute for each spark plug in the engine.The modern spark plug is designed to last many thousands of miles before it requires replacement.

BatteryAn automotive battery is a type of rechargeable battery that supplies electric energy to an automobile. Usually this refers to an SLI battery (starting, lighting, ignition) to power the starter motor, the lights, and the ignition system of a vehicles engine. An automotive battery may also be a traction battery used for the main power source of an electric vehicle.

12V, 40Ah Lead-acid car batteryIgnition system for C.I In a diesel engine the fuel ignites as soon as it is injected into the hot, highly compressed air in the cylinder. Diesel engines frequently utilize an electric heating element, called a glow plug, inside the cylinder to preheat the air to facilitate starting and running until the engine has reached its operating temperature.A glowplug (alternatively spelled as glow plug or glow-plug) is a heating device used to aid starting diesel engines.

Diesel engines, unlike petrol engines, do not use spark plugs to induce combustion.

Glow plug A glow plug is a pencil-shaped piece of metal with a heating element at the tip; that heating element, when electrified, heats due to its electrical resistance and begins to emit light in the visible spectrum, hence the term "glow" plug; the effect is very similar to that of a toaster. The heat generated by the glow plugs is directed into the cylinders, and serves to warm the engine block immediately surrounding the cylinders. This aids in reducing the amount of thermal diffusion which will occur when the engine attempts to start.

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