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S.I Engine lower compression Ratio is 6 to 11
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∙ 13y ago
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Why is the compression ratio of a spark ignition engine limited to about 9.51?
So the engine can run on regular 87 octane gasoline.
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
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
What type of engine uses compression ignition as it has no spark plugs?
a diesel engine uses compression and has no need of spark plugs
What is the difference between a reciprocating internal combustion engine and compression ignition combustion engine?
Compression ignition is deisel. Otherwise, spark ignition is gasoline.
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.
Why high compression ratios are not used in spark ignition engines?
spark ignition itself can easily burnt the air fuel mixture hence the high compression ratio is not needed.
What is the difference between a SI engine and a CI engine?
An SI engine ignites the fuel with a spark (SI = Spark Ignition) whereas the CI engine ignites the fuel with heat generated from compression (CI = compression ignition)
What is similar to a gasoline engine except it has no spark plugs?
A diesel engine has the same internal components and works off of compression ignition, not spark 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
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.
In which step of the four stroke engine cycle does the spark plug initiate the combustion reaction?
Compression and ignition
