What causes detonation?

WHAT CAUSES DETONATION?

Too much compression can cause detonation.
Over-advanced ignition timing can cause detonation.
Engine overheating can cause detonation.
Overheated air can cause detonation.
Lean fuel mixtures can cause detonation.
The wrong spark plugs can cause detonation.
Loss of EGR can cause detonation.

Likewise, people ask, how do you prevent engine detonation?

Detonation Elimination: 9 Ways to Prevent Engine Detonation

#1. Up Your Octane.
#2. Keep Compression Reasonable.
#3. Check Your Timing.
#5. Monitor the Mixture.
#6. Blow out the Carbon.
#7. Examine Your Knock Sensor.
#8. Read Your Spark Plugs.
#9. Consider Your Cooling System.

Also Know, how do you fix pre detonation?

Try a higher octane fuel.
Check for loss of EGR.
Keep compression within reasonable limits.
Check for over-advanced ignition timing.
Check for a defective knock sensor.
"Read" your spark plugs.
Check for engine overheating.
Check the operation of the heated air intake system.

Beside this, can too much fuel cause detonation?

Detonation occurs because fuel is subjected to either too much pressure, too much heat or both. Mild detonation can occur in almost any engine and will not cause damage. Prolonged heavy detonation can crack pistons and rings, blow out head gaskets, damage spark plugs and valves, and flatten rod bearings.

What Causes 2 stroke detonation?

Detonation is one cause of two stroke aircraft engine failure. In a normal combustion process the fuel-air mixture is ignited at a specific point before the piston has reached top dead center on the compression stroke. As the fuel is ignited it propagates a flame from the original spark.

36 Related Question Answers Found

What are the effects of detonation?

How would my mechanic or engine overhaul shop know detonation has occurred? Detonation has negative effects throughout the engine. Light detonation may cause premature wear on bearings and bushings. Severe or prolonged detonation can cause damage to the cylinder head and pistons.

What is the difference between pre ignition and detonation?

Detonation is one phenomenon that is abnormal combustion. Pre-ignition is another phenomenon that is abnormal combustion. Detonation: Detonation is the spontaneous combustion of the end-gas (remaining fuel/air mixture) in the chamber. It always occurs after normal combustion is initiated by the spark plug.

What do you mean by detonation?

Detonation (from Latin detonare, meaning 'to thunder down/forth') is a type of combustion involving a supersonic exothermic front accelerating through a medium that eventually drives a shock front propagating directly in front of it.

Can Pinging damage an engine?

It sends shock waves through the cylinder, creating the characteristic knocking or pinging noise. The shock waves also increase cylinder pressure. Over time, and if not remedied, this can lead to head gasket failure, piston ring damage, and other serious engine problems.

Will thicker oil stop engine knocking?

Once an engine starts to knock, the rod can fracture without warning. So, the first job in slowing down the deterioration is to thicken your oil viscosity and boost the oil pressure inside the engine. You'll know if it is working because it should quiet the knocking.

Can bad spark plugs cause pinging?

Pinging is pinging and can be caused by different factors including spark plugs, timing, bad gas Yes. plugs that are running too hot due to being the wrong heat range for the operating conditions can provoke pinging.

Can a rich mixture cause pinging?

Normal or rich mixtures cool a lot by fuel evaporation, and that is diminished with lean fuel mixtures. Therefore the CC temps are hotter, and causes the knock/ping. This is why high performance turbo engines run so rich - to cool things much and get more power at the cost of excessive fuel.

How do I get rid of spark knock?

Clean off the carbon deposits with a wire brush and carburetor cleaner, or replace the EGR valve if it is defective. (2) A bad knock sensor. Your engine has a knock sensor that should detect detonation and tell the computer to retard the ignition timing.

Can bad ignition coils cause knocking?

If the gasoline ignites on its own before the spark plug fires, because of engine pressure or engine heat, it explodes, making a knocking or pinging sound. Mori suggests your Pilot's knocking could be caused by "spark plugs that need to be replaced, ignition timing issues or any number of other possibilities."

Why is my engine pinging?

This is a car engine that has a ping. Also called spark knock, preignition or detonation. If left uncorrected it can ruin the motor. Caused by either a lean fuel condition, carbon deposits in the combustion chamber, over advanced ignition timing, wrong spark plugs, or overheating.

What is detonation and knocking?

Detonation: after completion of compression stroke in SI IC engine. The spark plugs ignites the injected fuel and explosion is started. Knocking: some fuel may get ignited during compression stroke itself before ignition from spark plug. This produce knocking sound and hence called knocking.

Is it safe to drive with a knocking engine?

Engine knocking is nothing to ignore. When the gasoline in your engine burns unevenly, it creates a kind of “POP” shock-wave that makes the knocking sound. Run your car for very long with this kind of problem, and it can cause serious engine damage.

Why does my engine ping when I accelerate?

The engine “pings” or knocks on acceleration. The symptom is more pronounced when the engine is at operating temperature. Engine ping is the result of abnormally high combustion temperatures. The usual cause of engine ping is over advanced ignition timing, an inoperative EGR system or improper fuel usage.

What does pinging sound like?

The sound is easily swamped by wind noise or loud exhaust. A small amount of very light pinging is OK and in many cars is considered "normal". When the pinging gets harder it is called "detonation" and can cause serious damage. Sounds like marbles in the engine.

Can injectors cause knocking?

A knock is generally caused by the ignition timing. An injector stuck shut causes a lean misfire which causes the engine to hesitate and loose power but not knock. An injector stuck open causes a rich mixture which will either reduce the chances of a knock or once again cause a misfire.

Can lean fuel mixture cause overheating?

A proper air/fuel mixture will help your engine run cool and to its full potential. Most overheating issues related to air/fuel ratios are the result of a lean mixture, which causes the cylinders to run hotter.

How pre ignition can be detected?

To detect the onset of pre-ignition an in-cylinder pressure transducer 60 can be used to detect the occurrence of heat release before the intended spark event. This can be performed on all cylinders of the engine 100 and on a cycle-by-cycle basis. By calculating heat release rates it is possible to detect pre-ignition.