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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 diesel
Warning: 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 else can I help you with?
Why diesel engines not suitable for 2 wheelers?
As you know, the piston in the Diesel engine compresses the air in the cylinder so that it gets extremely hot. Fuel is then injected directly into the cylinder where it ignites and causes the power stroke. Because the Diesel engine operates at very high compression ratios it has to be very strong, and therefore heavy. The injector that squirts fuel into the cylinder has to be both strong and very precise in order to force a precise amount of fuel into the cylinder. For these reasons, Diesel engines tend to be heavier than petrol engines, and more expensive because of the very precise engineering required in manufacturing the injectors. So they are not practical for fairly inexpensive 2 wheel vehicles.
What is a power-driven machinery?
It's any sort of machine that uses petrol/gasoline or diesel or steam or electricity to provide its energy rather than animals or human beings. Usually this term applies to industrial machines in factories or on farms or in similar places.
What are the different phases of combustion in a petrol engine?
1) Inlet, 2) Compression, 3) Ignition, 4) Exhaust. Otherwise known as; Suck, squeeze, bang, blow. 1) Fuel / air mixture is injected/drawn into chamber. 2) Mixture is compressed by piston. 3) Spark, and mixture burns, pushing piston down 4) Piston returning to top of cycle pushes out burnt exhaust gases.
Full form of SI engine?
SI stands for Spark Ignition. eg. Petrol Engine.
What is the ignition point of petrol?
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.
What are the defferences between dessel and petrol engine?
Petrol & Gas engines are spark ignited engines where as diesel engines are compression ignited engines. Petrol engines works with explosion of fuel air mixture due to spark from spark plug inside the cylinder. Diesel engines works with combustion of fuel air mixture due to compression, compressed mixture attains a very high temperature which exceeds the flash point of diesel and starts burning inside the cylinder and the hot gases after burning of fuel misture exerts force on piston which makes the diesel engines work. Diesel engines are highly efficient than petrol engines.
How is the engine ignited?
A petrol engine is ignited by a spark plug, and a diesel engine is ignited by the heat produced from the air/ fuel mixture being compressed in the cylinder
What is the difference between petrol power vehicle and diesel powered vehicle?
a petrol engine uses petrol which is highly combustable, so it can be ignited by a spark. that is why petrol engines have spark plugs. diesel is an oil based fuel, and takes higher temperatures to ignite, it cannot be as easily ignited by a spark and sometimes cant at all, so diesel engines have no spark plugs and the fuel is ignited under extreme heat due to pressure.
Can diesel oil be used in a petrol engine or vice versa?
Because , petrol is ignited before or on reaching the dead center at low temparature. But diesel burns at high temp also that's why petrol is not sufficient to diesel engines.
Why is petrol not used in diesel engines or diesel in petrol engines?
Because the engines will not run with the wrong fuel to to their design. Although both diesel and petrol engines are internal combustion engines, they have differences that enable them to use these different fuels. A petrol engine ignites the fuel/air mixture by using a spark plug. A diesel engine in contrast has no spark but compresses air during the compression cycle. When air is compressed it heats up. Diesel is then injected into the cylinder and it ignites.
How does petrol fuel ignite in the engine?
The compressed petrol gas fuel is ignited by a spark plug thus causing the engines' power stroke.
Is there any vehicle which can run on both petrol and diesel?
A vehical that runs on petrol and diesel is impossible as they are both ignited in different ways. For exaple petrol is ignited by the spark plugs and a diesel is ignited by the shear force of the compression from the pistons. A petrol engine has a round 9:1 compression ratio and a diesel has about 20:1 but these veary from engine to engine I hope that hasn't lost you
What are the basic different between the petrol and diesel engine?
Well gasoline engines have a spark plug that ignites the gasoline as it is injected into the engine. Diesel engines have no spark plugs because the high compression ignites the fuel as it is injected. Because it releases higher energy density, diesels get better fuel economy.The main difference between a diesel and a gasoline (petrol) engine are the way the fuel is ignited. In a gasoline engine, a fuel/air mixture is introduced into the cylinder either through a carburetor or fuel injection system, where it is then compressed and ignited with a spark. In a diesel engine, air is compressed in the cylinder which heats it to about 1000 degrees F (550 degrees C), then fuel is injected under high pressure and ignited by the superheated air. To accomplish this, diesel engines also have higher compression ratios than gasoline engines.
What is the difference between a diesel engine and a petrol engine ignition of mixture?
petrol engine - Fuel and air mixtures together and compressed in engine. These mixtures ignited by Spark plug Diesel Engine - Air only compressed at high pressure and Temperature. Fuel injected at high temp so that the ignition takes place
What is difference between a diesel and petrol engine?
Basically diesel engines are much higher compression giving them more torque also the fuel is ignited by compression not a spark like in a gas engine
What is the key difference between the piston action of an internal combustion engine and that of a compressed-air engine?
The internal combustion engine uses a fuel i.e petrol or diesel to cause compression when ignited ,when the fuel burns it causes compression of the piston. A compressed air engines power comes from an electric motor which forces the piston up and down to produce compressed air.
What is the difference between petrol and diesel engines?
diesel engines doesn't use spark plug but uses heater plug.petrol engines produces more torque than petrol engines but petrol engines produces more acceleration than diesel engines.petrol engine is faster to be heated than diesel engine.
