It has a flash point of about -50° F (-65° C)(lowest temp ignitable). The ignition temperature is about 495° or autoignition which it can go off without external spark source.
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.
SI stands for Spark Ignition. eg. Petrol Engine.
Compression ignition is deisel. Otherwise, spark ignition is gasoline.
This is the amount of time that it takes the ignition to start. This information would be present in the users manual.
direct ignition engine
fire point of petrol
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.
Diesel has highest ignition temperature.. So only diesel cant be used in petrol engine
246 degree Celsius............
246 degree Celsius............
As well as petrol you need oxygen and an ignition source
I swear I saw a Myth Busters (Discovery Channel) on this very question...Extremely difficult at best, and not very likely.Note: it is not the liquid petrol (gasoline for us Yanks) that fires up - it's the vapors that are the point of ignition.
Petrol has a high ignition temperature, which means it requires a certain amount of heat to ignite. The autoignition temperature of petrol is around 246 degrees Celsius, which is higher than typical ambient temperatures. This is why petrol does not catch fire spontaneously at normal temperatures.
The flash point of petrol represents the temperature at which it can ignite when exposed to an open flame. However, for petrol to combust, it must also be in the presence of oxygen and have an ignition source. In summer, the atmosphere temperature being higher than the flash point of petrol alone is not sufficient to cause it to catch fire without these additional factors.
you cut off the ignition spark in a petrol engine
Petrol is a complex mixture of hydrocarbons and its composition can vary. Typically, petrol has a low melting point and boiling point range due to its composition of lighter hydrocarbons. The boiling point of petrol is generally around 30-200°C, while the melting point is typically below -50°C.
Petrol has a lower boiling point than diesel. This is because petrol is a lighter fraction of crude oil, consisting of shorter hydrocarbon chains, which results in a lower boiling point compared to diesel.