How comes....

[dele]

Obviously pretty much all Diesel engines are Turbo'd, but why no Supercharged ones?

Im sure the answers obvious, but i was thinking about it today, theres supercharged petrol engines, but why not diesel engines?

[stevieturbo]

Not exactly very many supercharged ones in general though. It is dearer to do.

Turbos for a diesel are very easy. They have a small operating range so it's easy to size a turbo to spool early and make a good spread of torque where the engine will always be.
Say 1000-3500rpm or so.

Turbos are cheap, reliable and they work.

But I am surprised myself that you dont see the odd one somewhere.

[seagrey]

supercharged and/or twincharged diesels are fitted to big marine stuff and generators but do suffer from poor fuel consumption in comparison.

[powerstroke]

dele said:

Obviously pretty much all Diesel engines are Turbo'd, but why no Supercharged ones?

Im sure the answers obvious, but i was thinking about it today, theres supercharged petrol engines, but why not diesel engines?

common in big diesels esp the 2 strokes some have both TC and SC
www.youtube.com/watch?v=19eQBQep-sc The turbo is a win win on a diesel better power and economy and cleans up emissions, supercharging, gives power esp at low speed but takes power to turn it so hurts economy.. mazda did a supercharged diesel car at one point but it was soon dropped....

Edited by powerstroke on Thursday 27th January 23:23