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Through the help of a spark plug. An high voltage electrical discharge across the the tips of a spark plug, which sits in the compression chamber, creates a spark which ignites the fuel-air mixture inside.

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10y ago
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13y ago

Fuel is burned to create sparks in the engine. the sparks push the pistons which send propelling motion to the needed parts of the vehicle.

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Q: How the fuel is ignited in a petrol engine?
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What does an engine block do?

It forms the 'body' of the engine - it is a lump of metal machined to take the crank shaft, oil and cooling ducts and the pistons. It is where the 'explosions' of ignited fuel are contained and turned into rotary motion.


What do you mean by carbs?

If it's about engines it's short for carburetor, the thing that mixes fuel and air into something that can be ignited by the engine. If it's about food then it's short for carbohydrates, which is one of the types of nutrients that we need.


Does a fire need fuel oxygen and heat to burn?

Yes it does. If either fuel oxygen or heat were not sufficient or absent, fire would not be able to be sustained or ignited. :)


Main advantages and disadvantages between compression ignition and spark ignition engines?

A spark ignition engine is a gasoline engine. A compression ignition is a diesel engine.basic difference between compression and spark ignition engine is ,compression ignition is a diesel engine. spark ignition is a gasoline engine.diesel engines compress the fuel to a point where the fuel explodes, thus giving ignitiongasoline does not compress to explosion, therefore it needs need a spark to ignite the fuelspark ign. is gasoline. comp. ign. is diesel.A compression ignition engine is typically a diesel. It compresses air so much that the heat from the compression is enough to cause the fuel to ignited once injected. A spark ignition engine is your average gasoline-burning car engine. It uses a spark plug to ignite the air/fuel mixture instead of relying on compretssion ignition.A compression ignition engine uses very high compression of the air to heat it self up and the fuel is injected into the cylinder which self ignites (a diesel engine is a compression ignition engine).A spark ignition engine uses a lower compression ratio and requires the use of a spark to ignite the fuel (a petrol engine is a spark ignition engine).Because the oils used for a diesel have a higher calorific value, they have a better fuel economy, They also do not need extra energy usage to keep the engine running, unlike the energy that is lost to power the spark plugs from the generator/alternator which is taken from the useful energy produced by the engine.


What engine size does a smart car have?

600cc petrol or 800cc diesel

Related questions

How is the engine ignited?

A petrol engine is ignited by a spark plug, and a diesel engine is ignited by the heat produced from the air/ fuel mixture being compressed in the cylinder


How does petrol fuel ignite in the engine?

The compressed petrol gas fuel is ignited by a spark plug thus causing the engines' power stroke.


Why is carburetor used in petrol engine but not in diesel engine?

a petrol engine needs to mix its air and fuel before passing it into the combustion chamber before being ignited diesel has its air mixture heated as the piston compresses it in the combustion chamber then the atomized diesel fuel is injected into the hot air and is ignited.


Why petrol engine is called spark ignition engine?

Because the fuel is ignited by a spark plug rather than by compression as is the case with a diesel.


What is the difference between petrol power vehicle and diesel powered vehicle?

a petrol engine uses petrol which is highly combustable, so it can be ignited by a spark. that is why petrol engines have spark plugs. diesel is an oil based fuel, and takes higher temperatures to ignite, it cannot be as easily ignited by a spark and sometimes cant at all, so diesel engines have no spark plugs and the fuel is ignited under extreme heat due to pressure.


What happens if you put diesel into petrol engine?

It won't run. Diesel is ignited by compressing the vaporized fuel much higher than a gasoline (petrol) engine. A SMALL amount will result in very poor performance.


What is the difference between a diesel engine and a petrol engine ignition of mixture?

petrol engine - Fuel and air mixtures together and compressed in engine. These mixtures ignited by Spark plug Diesel Engine - Air only compressed at high pressure and Temperature. Fuel injected at high temp so that the ignition takes place


Is there any vehicle which can run on both petrol and diesel?

A vehical that runs on petrol and diesel is impossible as they are both ignited in different ways. For exaple petrol is ignited by the spark plugs and a diesel is ignited by the shear force of the compression from the pistons. A petrol engine has a round 9:1 compression ratio and a diesel has about 20:1 but these veary from engine to engine I hope that hasn't lost you


Why is diesel is not used in petrol engines?

Because diesel is ignited of heat and high high compresion not a spark on lower compresion petrol engine. If you use diesel in a petrol you will end up with your engine knocking and pre-detonation followed by your engine blowing up pretty bad.


What are the defferences between dessel and petrol engine?

Petrol & Gas engines are spark ignited engines where as diesel engines are compression ignited engines. Petrol engines works with explosion of fuel air mixture due to spark from spark plug inside the cylinder. Diesel engines works with combustion of fuel air mixture due to compression, compressed mixture attains a very high temperature which exceeds the flash point of diesel and starts burning inside the cylinder and the hot gases after burning of fuel misture exerts force on piston which makes the diesel engines work. Diesel engines are highly efficient than petrol engines.


Can we use fuel injector in petrol engine?

Yes, you can use a fuel injector in a petrol engine.


What is difference between a diesel and petrol engine?

Basically diesel engines are much higher compression giving them more torque also the fuel is ignited by compression not a spark like in a gas engine