0
What will happened if the auto ignition of the diesel engine not occur?
Wiki User
∙ 12y ago
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.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What causes ignition to occur in a diesel engine?
When the piston compresses the fuel-air mixture, the spark ignites it, causing combustion
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.
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.
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.
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.
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.
What is the difference between a conventional diesel engine and common rail diesel engine.How does the common rail diesel engine work?
Common rail diesel basic description:A common rail diesel engine differs from a conventional diesel engine in several important respects. A conventional diesel engine works via a mechanical injection system, which relies on the engine's diesel injection pump to deliver the required fuel pressure, at the correct time, to the diesel injector in order to allow the injector to operate. Each individual injector on a conventional diesel engine has its own pipe or "rail" connecting the injector to the mechanical pump, allowing the delivery of fuel to the injector. Common rail diesel injection systems work on a much different principle. In this system the mechanical controls are replaced by electronic controls to allow for more precise metering and timing of the fuel delivery into the engine, and therefore the injection pump is no longer solely responsible for the operation of the injection system. Also, the individual injector rails are replaced by 1 (or 2) "common rail" which operates under a constant high pressure. There is no injection pump associated with this system, yet a high pressure pump is still required to deliver the high pressure fuel to the common rail. The high pressure pump is capable of producing (depending on the system used) approximately 29000 psi of pressure into the common rail. At the correct time the electronic injector is operated and the fuel is injected into the engine allowing ignition to occur. The timing and fuel quantity is controlled by an advanced engine management system which gathers data on the engine conditions via a collection of sensors. All of these sensors measure different system parameters to calculate the correct fueling for the engine at any given moment.
What do you do if regular gasoline was put in your truck and it has a diesel engine?
First off, DO NOT run this engine or serious damage will occur. Drain the fuel tank, blow out all the fuel lines, replace the fuel filter, and remove as much fuel as possible from all fuel components. Pour in a fresh supply of diesel and start it up.
