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Why high compression ratios are not used in spark ignition engines?
Wiki User
∙ 13y ago
spark ignition itself can easily burnt the air fuel mixture hence the high compression ratio is not needed.
Wiki User
∙ 13y ago
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Spark plugs cause the ignition in Diesel engines?
No, spark plugs do not cause ignition in diesels. The fuel compression causes ignition
What is spark ignition or Diesel?
spark ignition engine is also known as petrol engine. but in diesel engines the fuel is burnt due to the high compression of air.so there is no need of spark plug
Do diesel engines require spark plugs?
No diesel engines use the "heat of compression" to cause fuel to ignite not electrical ignition.
What is SI engine and CI engine?
An SI engine is a spark ignition engine. A CI engine is a compression ignition engine. SI engines use spark plugs to ignite fuel in the combustion chamber. CI engines use compression in the combustion chamber to ignite the fuel.
Which engine has highest compression ratio?
the diesel engine. it takes one ignition to start, then it runs off of (autoignition) ignition from heat caused by high compression. compression ignition (autoignition) causes ignition to happen a little earlier than spark ignition engines (gas engines) which is less vulnerable to risk of engine knocking or wasted power when dealing with high compression. -maddmatt
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 are stages of combustion in CI engines?
Intake, compression, power/combustion, exhaust. Same as a standard SI (Spark Ignition) CI (Combustion Ignition) is how diesel operates. They contain no spark plugs. The compression heats the fuel to the point of SELF COMBUSTION .
Does an mpfi engine replace spark plug?
No. Spark plugs remain in Petrol engines. MPFI stands for Multi Point Fuel Injection, thus replacing the carburetor with injectors. Petrol engines need a source for ignition unlike Diesel engines, where the ignition happens due to compression.
How many types of spark ignition engine?
There are basically two types of spark ignition engine. They are the diesel spark engines and the petrol spark engines.
Why gasoline is not used in diesel engines?
Gasoline does not combust properly, or at all, in a compression ignition engine. Gasoline is designed to be ignited by a spark.
What are si and ci engines?
SI engine means Spark Ignition Engine where combustion products(air,fuel)are ignited in combustion chamber by means of spark from spark plug which is located on cylinder head..CI engine means Compression Ignition Engine,here combustion is take place by means of compression..
What is spark ignition engine?
A 'spark ignition ' engine is your regular gasoline engine as opposed to a diesel, which is a 'compression ignition' engine
