Can you over rev a diesel?

If you manage to over rev an engine designed like this, the same problems as over revving a petrol would apply. You are probably correct about any electronically controlled engines and the fuel being cut off, it will essentially be in an overrun condition and that is how a petrol engine’s ECU would respond.

Why is my engine over-revving?

The most common cause of this revving is either a stuck throttle or the mass airflow (MAF) sensor. This fault should be addressed as soon as possible for normal operation as this revving can become dangerous if the vehicle is allowed to accelerate unintentionally.

Why do diesel engines make so much torque?

Stroke Length and Combustion Speed In order to combust fuel, diesel engines use air compression and with faster compression rate the fuel burns faster thus adding to torque levels. The longer strokes of the diesel engine allow the piston to be moved to longer distance thus creating more force or pressure.

Do diesel cars have more torque?

As a consequence of a higher compression ratio (longer stroke), diesel engines produce more torque which means you get more acceleration off the line. This is also the main reason for diesel cars having a much smaller power band, so you generally get more torque but spread over a smaller area.

Why do heavy vehicles almost always use diesel engines?

Diesel engines are ideal for heavy vehicles such as locomotives, ships, trucks, and other gigantic automobiles. Therefore, it has higher torque application . To turn on such a big vehicle, it requires a large amount of energy that ultimately leads to augmented combustion rate.

Why do diesel engines produce so much torque?

There are actually a number of reasons why diesels make so much torque, but the big reasons are stroke length, turbocharger boost, and average effective cylinder pressure. Turbo-diesels typically operate at higher turbocharger boost levels than do comparable gasoline engines.

Why are diesel engines noisier than petrol engines?

In the diesel engines, the fuel is injected into the already compressed air inside the cylinder. These types of engines are much noisier than the petrol ones because their mechanics work under higher pressure. There are a lot of small parts inside, such as metal caps, small valves and oil pipes, that create the noise.

Why do diesel engines last longer than gasoline engines?

As others have written, diesels are constructed heavier than gasoline engines because they produce higher torque (Heavier crankshaft) and operate at a higher compression ratio. (Stronger cylinders/heads, etc.) There are other reasons diesels last longer. They develop their maximum power at a slower speed than gasoline engines.