Multi Point Injection Diesel? 1

[SonyAD]

I was wondering whether it made any sense to have more than one injector per cylinder in diesel engines.

Instead of a centrally mounted injector fed by a fuel line from the common rail injecting fuel, for example, at a maximum of 1350 bar (like in my car, 90 PS/BHP? HDi, my 2000) why not have 2 or 3 in the hopes of improving spread and mixing and also speeding it up for better torque at high rpm.

Would it make sense to have 3 solenoid injectors per cylinder connected to 3 common rails fed by 3 injection pumps running at a peak of 1350 bar instead of 1 piezoelectric injector per cylinder connected to one common rail fed by 1 injection pump operating at a maximum of 1600 bar?

At least in terms of specific power if not of efficiency (running three 1350 bar pumps instead of one 1600 bar pump) or cost?

Or, if you can get it to work, use one injection pump feeding fuel at 1350 bar to one common rail with 8 or 12 outlets for two/three solenoid injectors per cylinder in an inline 4, for example.

You'd also be able to keep multi stage injection to high rpm with solenoid injectors.

I was thinking of placing the injectors so that they form an equilateral triangle inside, not necessarily near, the cylinder circumference and have them oriented centrally, towards the piston crown burn chamber.

Pls. don't lapidate or laugh. I'm not an engineer.

 

[turbocohen]

Improvements to piezo and maybe someday magnetostrictive actuated spray guided injection renders multiple injectors of little economic benefit.