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What causes ignition to occur in a diesel engine?
CelinaJadrien Baylon
When the piston compresses the fuel-air mixture, the spark ignites it, causing combustion
Parker Braun
Conner Jac4578
helllo no
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Why during the ignition pressure remain constant in diesel engine?
The ignition temperature, (temperature at which diesel fuel ignites) is 490*F. This temperature corresponds to a set compression of the gasses in the cylinder of the engine. Some, but not all, diesel engines have glow plugs to initially warm the air when you first start the engine because the temperature of the air in the diesel engine is too cold to get the ignition temperature simply from compression. while the engine is running the compression heats the air to the ignition temperature. This compression (or pressure) is the same each time the cylinder fires. Using the universal gas law you can find that corresponding compression versus the ambient temperature and pressure. Typically this will occur at approximately 16 bars. Almost all diesel engines are designed to operate at a compression ratio of 15:1 - 20:1, less if supercharged or turbocharged.
What is the cause of combustion in car engine?
For a gas, E85, or LNG/LPG/CNG engine, it's a spark from the spark plug igniting the fuel air mixture. For a diesel engine, it's compression which causes the combustion to occur.
Why is ignition timed at the compression stroke?
Power is produced by the expanding gasses that have been ignited. These force the piston down. To maximise this power the ignition (spark with a petrol engine, injection with a diesel engine) it is timed to occur just before top dead centre of the compression stroke (upwards), when the air is at its maximum density.
My mini chopper wont start up...What causes a 49.5cc 4 stroke engine to backfire when starting?
If your engine backfires when trying to start and the valve timing is correct, then it could be electronic ignition unit or the pick up that causes the spark to occur with wrong timing.
What will happened if the auto ignition of the diesel engine not occur?
There are a couple of problems with the question. Ignition(Cylinder Firing) on Diesel engines occurs through compression ignition. When the engine is first started cold the glow plugs turn on to help heat the fuel to the temperatures required for compression ignition, but then turn off, while the engine continues to run. The engine is shut off by cutting the fuel supply. If the fuel supply runs while the the engine is turning over without combustion for any period of time the result will be a flooded engine, or in extreme cases, Hydraulic Seizure. Where there is too much fuel in the cylinder for the piston to reach the top. The fuel supply is requires to have compression ignition. If there is no fuel being supplied by the injector, yet the glow plugs are still turning on, nothing will happen. In extreme cases of over-cranking without fuel supply, cylinder and piston ring damage can occur. The fuel supply is also required to get the engine to fire.
38 liters of petrol has been added to the fueltank with approx the same amount of diesel. can more diesel be added and vehicle run?
Drain all fuel from the tank and fuel lines and put in diesel. Engine damage will occur if you run gas in a diesel engine.
Why you dont use self detonation in petrol engines?
"Petrol", or gasoline, engines require a spark plug to ignite the fuel and air mixture to generate energy on the power stroke in a typical four stroke engine (Intake, Compression, Power, Exhaust). Diesel engines use what is sometimes called "compression ignition" to ignite the fuel air mixture on the power stroke. I'll assume by "self-detonation" you mean ignition by something other than a spark plug. Gasoline cannot be used in a diesel engine, nor can diesel fuel be used in a gasoline engine. Engine damage can occur in either scenario. Diesel fuel is less refined than gasoline so is more oily. This helps lubricate and cool the inside of the diesel combustion chamber that operates at much higher temperatures. In a gasoline engine, combustion temperatures are lower so the oil does not burn off and will cause excessive and heavy smoke. I'm not sure if gasoline would even work in a diesel engine because gasoline has a lower flash point than diesel and would ignite too soon and burn too fast in the diesel combustion chamber. Perhaps another, more knowledgeable, contributor could shed some light on that one. The bottom line is if the engine is "self-detonating", aka compression ignition, it would be a diesel engine not a "petrol engine". The engine cannot be both petrol and compression ignition - it just wouldn't work. Diesel engines have become better and better in recent years since automakers have put R&D money into projects, and VW now has the TDI diesel that is powerful, efficient, economical, and reliable.
You put petrol in a diesel engine by mistake what will happen?
If you put petrol in a diesel engine by mistake, the tank must be fully drained before driving as they are incompatible. If this is not done, the vehicle will not run and permanent damage can occur.
What happens when a timing belt breaks on a 3litre turbo diesel ford ranger?
Serious internal engine damage will occur.
Why is it so important for the ignition process to occur in a gasoline car?
For a combustion engine to work, it must have the following: Air Fuel Ignition if any of the above are not present, combustion cannot take place.
How the knocking differs of SI engine with CI engine?
In SI engine knock occur due to spontaneous ignition of end gases , as propagating flame compresses the mixture causes high temp & pressure reaction take place in end gases that burns rapidly with high pressure peak called knock. Where as in CI engine knocking or detonation occur due autoignition fuel & air not mixed homogeneous prior to combustion.pressure peaks of knock come before Top Dead Center(TDC) in CI engine where as in SI engine it comes after the TDC.
When does engine knocking occur?
Engine knocking occurs in a vehicle when there are misfires in the spark plug ignition causing an air/fuel mixture to explode outside the envelope of the normal combustion front. This condition could be very damaging to an engine if not checked by a mechanic.
