The auto combustion pressure for a diesel engine is 580 psi. This is compared to the 200 psi of the gas powered engine.
Internal combustion.
180o C
Plunger is used in diesel engine fuel injection system which meters the fuel into combustion chamber. Higher the plunger diameter, higher the fuel injected into the cylinder. The plunger diameter of a typical diesel engine could be 9-10mm. Cam disk is connected to the plunger and each revolution, plunger will diesel 4 times into the combustion chamber.
low fuel pressure
Diesel knock is generated due to fully advanced timing and retard conditions. If the timing is retard the fuel will not be burned purely and rapid pressure will be developed and pinking noise will be generated. In a advance condition the fuel is injected in to the combusion chamber before reaching the piston tdc the burning will start suddenly otherhand the piston is being compresses the charge. The combusion should be done at maximum pressure and temperature but in this case the fuel does not burnt at that stage (actually piston wants the load at that time)the pressure is not developing instanteniously rapid pressure developed thats why the diesel knock generates. Another reason for diesel knock if diesel does not have the good cetane number knocking will be generatedTHIS ANSWER HAS SUBMITTED BY LOHITHKUMAR S FROM TATA MOT0RS MANGALORE
The diesel combustion pressure depends on various factors. The model and the type of diesel engine is important.
under the bonnet
The calorific value of fuel is the quantity of heat produced by its combustion at a constant pressure and under normal conditions. For diesel, the calorific value is 44,800.
Stoich for combustion of deisal is different and pressure required as well. Carbs only work with combustion point and air requirements of gas.
HDI is High pressure Direct Injection engine that is found in diesel cars. Fuel is injected into the combustion changer under high pressure.
Gasoline engine is an internal combustion engine where a diesel is an internal compression engine. Gasoline is highly flammable and explodes when an electrical spark is applied to it where diesel explodes when it is put under pressure
In terms of engines, an external combustion engine such as a steam engine burns fuel outside of the pressure cylinder used to drive the piston. An internal combustion engine such as a petrol or diesel engine burns the fuel inside the pressure cylinder used to drive the piston.
Rather than introducing a spark to promote combustion, the diesel fuel is continually compressed in four cycles until it reaches a point where the pressure causes it to combust.
Diesel Engine combustion chamber types : Swirl port combustion chamber type and Preignition port combustion chamber type.
Petrol and diesel engines are internal combustion engines. The internal combustion that turns the engine and powers the wheels is created by the combustion of fuel. No fuel, no combustion, and nothing to drive the wheels.
The main difference between a diesel and a steam engine is the diesel engine is an internal combustion and the steam engine is external combustion.
Internal combustion engine is where the fuel is ignited in the cylinder to make the piston move, petrol or diesel. A steam engine has an external pressure vessel to supply the steam to the cylinder to push the piston. the is no combustion in the engine as such.