Mechanical Engineering - Automobile Engineering - Discussion
Discussion Forum : Automobile Engineering - Section 3 (Q.No. 16)
16.
The self ignition temperature of Diesel as compared to petrol is
Discussion:
16 comments Page 1 of 2.
Gurjeet said:
1 decade ago
How it is possible, otherwise why spark plug is used in petrol and not in diesel :P?
Shubham said:
1 decade ago
That is the same reason spark plugs are used in petrol because it needs higher temperature to ignite but in case of diesel higher compression (pressure) and lower temperature are enough to ignite it.
Afrasiyab said:
1 decade ago
Diesel - 400 degree celsius, petrol - 280 degree.
Retheesh b said:
1 decade ago
Diesel 210 degree Celsius; petrol 245 - 280 degree Celsius.
Rajiv Ramaswamy said:
9 years ago
No, Mr. Retheesh.
The self-ignition temperature of Diesel is higher than petrol. That is why we use a spark plug to ignite petrol engines and don't use external ignition source for diesel engines.
Absolutely wrong answer.
The self-ignition temperature of Diesel is higher than petrol. That is why we use a spark plug to ignite petrol engines and don't use external ignition source for diesel engines.
Absolutely wrong answer.
TARUN said:
9 years ago
The answer is wrong because diesel needs higher compression ratio to get ignite, thats hy fuel injectors are used in place of the spark plug, petrol is a purified form og diesel only. So it ignites more quickly.
Sundar said:
9 years ago
B is correct, I agree with @Retheesh.
Vedh tidake said:
9 years ago
Self-ignition temperature of petrol is 247-280°C. Self-ignition temperature of diesel is around 210°C.
Ankur said:
8 years ago
How it is possible that self ignition temp of diesel is lower than petrol as it requires high compression ratio?
Ashish Ganeshpure said:
8 years ago
The Self Ignition auto-ignition temperature is the lowest temperature at which a fuel such as petrol or diesel spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark. Self-ignition temperature of petrol is 247-280°C. Self-ignition temperature of diesel is around 210°C.
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