Detonation In Ci Engine
Detonation In Ci Engine. Detonation can vary in intensity from light, moderate, to severe depending on several factors. The two chemical drops normally used are, ethyl nitrate 33gms/us gallon 29gms/us gallon amyl nitrate higher the cetane number of the fuel, lower is the chances of knocking.
In spark ignition engines (si engines), at the end part of the gas, if flame speed and delay period are low in the combustion chamber, produce detonation in si engine. Detonation can vary in intensity from light, moderate, to severe depending on several factors. Detonation puts a limit on the compression ratio.
Detonation Can Be Controlled To A Certain Extent.
An engine is designed to work in a specific way. Essentially, carbon deposits can accumulate in the combustion chamber and on top of pistons until the overall compression of the engine is altered. Because of the high pressure and temperature at the intake, the ignition lag decreases which results in reducing problems of knocking or detonation.
Factors Affecting Detonation Or Knocking In Si Engine 1.Compression Ratio:
Detonation means the sudden and violent knocks experienced in an internal combustion engine. 2) controlling the rate of fuel supply: Detonation results in a sharp rise in cylinder pressure and temperature far in excess of normal combustion.
In The Ci Engine The Fuel And Air Are In Perfectly Mixed And Hence The Rate Of Pressure Rise Is Normally Lower Than That In The Detonating Part Of The Charge In The Si Engine.
In the case of the ci engine, it was the first part of the gas which causes the knocking in ci engine and rough running of the engine. Knocking (also knock, detonation, spark knock, pinging or pinking) in spark ignition internal combustion engines occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front. Detonation puts a limit on the compression ratio.
(Si Engine) Detonation An Uncontrolled Explosion Of The Unbrunt Air Fuel Mixture In The Engine Cylinder Occurring After The Regular Combustion Of Some Of The Fuel Charge Caused By The Spark At The Spark Plug.
The blow of this pressure wave may be of sufficient strength to. Because detonation interrupts that design, it robs the engine of power. In spark ignition engines (si engines), at the end part of the gas, if flame speed and delay period are low in the combustion chamber, produce detonation in si engine.
In Ci Engines, When Fuel Is Injected In The Combustion Chamber And.
This occurs when it strikes against cylinder walls, cylinder head, and piston. 3) by injecting less fuel in the beginning and then more fuel amount in the combustion chamber. Therefore, to avoid detonation in si engines auto ignition of end gas has to be prevented, and in ci engines earlier possible auto ignition should.
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