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Because that would make the compressed air so hot that the gas/fuel mixture would self ignite, and you don't want that. Gas engines rely on spark plugs to have the the cylinger ignite at the right moment. W/o it you get an uncontrolled flame front, knocking, rough running and maybe even engine damage
What else can I help you with?
Does disel engines have a higher cc compared to petrol engines?
No..the compression ratio is much higher eg a small petrol engine will have a ratio of 8:1 where a diesel small engine has around 17:1..
What is compression ratio for petrol engine?
Different engines - different ratios, but commonly around 8 to1.
What is the compression ratio of NASCAR engines?
The compression ratio for NASCAR engines is limited to 12.0:1.
What is the compression ratio on a 1.4 corsa petrol engine?
For the Opal Corsa generation Corsa B, 1.4 i petrol engine, the compression ratio is 9.4. It has 60 horsepower and a 46 liter fuel tank. For the 1.4 XER, the compression ratio is 10.5. For the 1.4 i 16V ECOTEC, the compression is 10.5.
Why compression ratio of petrol enine is 8 where as diesel engine is 22?
because a diesel engine ignites its fuel with pressure, and not with a spark like a petrol engine. that is why a petrol engine does not need as high a compression ratio as a diesel engine
Why do diesel engines give more mileage than petrol engines?
1) Diesel contains more energy in it than Petrol 2) Diesel engines can run much leaner air fuel ratios than petrol without engine damage, due to compression ignition there are no pre-ignition problems 3) Pumping losses are much lower because the throttle is always wide open 4) Compression ratio is much higher which leads to better thermal efficiency than petrol.
Why diesel engine car is costlier than petrol engine car?
Due to the increase in the compression ratio of a diesel which fires on compression rather than spark, the engine is built much stronger than a petrol engine. It therefore just costs more to manufacture.
V engine Compression ratio?
The compression ratio of engines is a value that demonstrates or shows the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity.
What are the parts of a diesel engine that are not found in a petrol engine?
Diesel engines have several components that are not found in petrol engines, primarily due to their different combustion processes. These include a turbocharger, which is often used to increase air intake efficiency, and a higher compression ratio, necessitating stronger engine components like heavy-duty pistons and connecting rods. Additionally, diesel engines feature a fuel injector system designed for direct injection, as well as glow plugs to assist with cold starting. The absence of spark plugs in diesel engines, which rely on compression ignition, is another key distinction.
Why can't petrol be compressed and ignited as in the case of diesel engines?
petrol self ignition temperature is high and requires a spark plug instead to ignite.where as diesel ignites automatically under pressure because of low self ignition temperature without any spark plug....hence petrol cannot be used inplace of dieselWarning: The above answer is absolutely incorrect. Petrol's flash point is significantly below, not above, diesel. The heat needed for ignition in a diesel engine comes from a compression ratio of over 20:1. Petrol engines have compression ratios of less than 10:1. Even at this lower compression ratio, petrol will still sometimes flash over or "detonate," causing the engine to "knock." This kind of nonsense is why I stopped posting here.
What is compression ratio in ic engine?
This is the ratio between the total volume to the clearance volume in IC engines
Why is diesel engine more expensive than petrol engine?
Because of higher compression ratio.
