What Does Detonation Feel Like?

How do you check for detonation in an engine?

Moderate to severe detonation could be noticed as engine roughness, vibration or loss of power and eventually engine damage.

A pilot should always be looking for unexpectedly high Cylinder Head Temperatures (CHTs) or Exhaust Gas Temperatures (EGTs) which may be a sign that detonation is occurring..

How do you stop engine knocking?

Tips for Preventing Engine KnockAlways fuel from a reputable gas station with good fuel quality.Change your spark plugs as often as required and not just when they are worn out.Reduce the throttle immediately you hear any engine knocking or pinging.Use high-quality fuel additives to minimize carbon build-up.More items…•

What causes detonation?

Detonation is generally caused by excessive heat, excessive cylinder pressure, improper ignition timing, inadequate fuel octane or a combination of these. Of the previous, excessive heat is usually the culprit. As an engine is modified to generate more power, additional heat is produced.

What is difference between detonation and knocking?

Detonation is an uncontrolled combustion event which occurs after the spark event. Pre-ignition is an uncontrolled combustion event which occurs before the spark event. Knock (pinging) is the actual noise that can be audibly heard if detonation is bad enough.

How do you fix 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.

What does detonation look like on a piston?

Detonation is spontaneous combustion inside the cylinder AFTER the spark plug fires. It is similar to Pre-Ignition, but it is different. … This causes a brief, but intense, spike in cylinder pressure. Detonation is also called an “Engine Knock”, “Knocking”, or “Pinging” because of the sound it makes.

Can I drive with a bad knock sensor?

In conclusion, you can drive with a bad knock sensor—that is, if you want to destroy your engine and get atrocious performance from your car. The moment you confirm that your knock sensor has seen better days, it would be wise to swap it right away with a high-quality replacement.

What is a detonation wave?

Detonation waves are shock waves which are sustained by the energy of the chemical reaction that is initiated by the shock compression. From: Combustion, Flames and Explosions of Gases (Second Edition), 1961.

What is a knock detonation sensor?

The knock sensor is located on the engine block, cylinder head, or intake manifold. Its senses vibrations caused by engine knock or detonation. The PCM uses this signal to alter the ignition timing and prevent detonation. … Be clear that this sensor affects the ignition timing of an engine.

What is detonation in aviation?

Detonation – Detonation, as the name suggests, is an explosion of the fuel-air mixture inside the cylinder. It occurs after the compression stroke near or after top dead center. During detonation, the fuel/air charge (or pockets within the charge) explodes rather than burning smoothly.

How do you fix pre detonation?

There are several ways to cure pre-ignition:Run higher octane fuel. Premium gas rated at 92 or 94 octane is best for an engine with a compression ratio between 9.25 and 10.25:1. … Run the engine on the rich side. … Try playing with ignition timing.

What does detonation look like on a spark plug?

With the early signs of detonation, the shock-wave will also rattle rings causing the tiny amounts of oil that now gets by rings, to be fused to the white porcelain as tiny black specks, also fused as specks are soot that was clinging to clearance volume surfaces in the relatively “still-air” of the boundary layer.

What is meant by detonation?

noun. the act of detonating. an explosion. Machinery. the premature spontaneous burning of a fuel–air mixture in an internal-combustion engine due to the high temperature of air compressed in a cylinder.

What does pinking sound like?

It’s like a metallic tinkling when you put the engine under load. Metal spoon rattling in a porcelain cup.

Can a bad knock sensor damage the engine?

Through loud knocking noises, pinging sounds, reduced engine performance, and poor fuel mileage, the signs of a bad knock sensor can prevent this issue from permanently damaging the engine.