Petrol engine how does it work

Atkinson-cycle engines, for example, change the valve timing to make a more efficient but less powerful engine. Turbocharging and supercharging, grouped together under the forced-induction options, pump additional air into the engine, which increases the available oxygen and thus the amount of fuel that can be burned—resulting in more power when you want it and more efficiency when you don't need the power.

Diesel engines do all this without spark plugs. But no matter the engine, as long as it's of the internal-combustion variety, the basics of how it works remain the same. And now you know them. New Cars. Buyer's Guide. Type keyword s to search. Today's Top Stories. Getty Images. The Best. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

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You may be able to find more information about this and similar content at piano. It was named after German engineer Nikolaus Otto who invented, developed and patented first Four-Stroke petrol engine.

The Four-Stroke petrol engine works on the following cycle which includes —. Suction Stroke — With pistons moving downwards and the opening of the inlet valve creates the suction of air-fuel mixture. Compression Stroke — With the closing of Inlet valve, it closes the area above the piston. The piston moves up resulting in compression of the air-fuel mixture in a confined space.

Combustion Process - At this stage, the spark-plug fires the spark which results in instantaneous burning of petrol causing in an explosion.

This causes heat to release which generates expanding forces known as power. Power Stroke — Furthermore, these forces again push the pistons downwards resulting in their reciprocating motion. Thus, this cycle repeats itself until the engine is turned off, resulting in the continuance of its running. The earlier generation petrol engine used ' Carburettor ' to supply petrol to the engine. Compression: When the piston is pushed back to the top of the cylinder, it compresses the mixture, thus making it more flammable and causing the spark plug to fire.

Power: The spark ignites the mixture causing a small explosion. Outlet: Following the explosion, the crankshaft forces the piston back to the top of the once again. This is when all the exhaust gases created by the chemical reaction are pushed through the outlet valve, allowing them to exit the system via the exhaust. This process is repeated constantly, from the moment you turn your key in the ignition, to the moment you switch it off.

How does the petrol-powered internal combustion engine work? Facebook icon Twitter icon YouTube icon Instagram icon.