Clarification requested : 617 motor - DI?
 

Could someone let me know if I'm correct in saying that the 617 motor uses Direct Injection? If not, which type? Thanks.

It's indirectly injected, into prechambers.

Also, a lot of us prefer the injection into pre-chambers. Mercedes did it to keep noise down. It has the added affects of preventing a nailing injector from burning a hole in a piston. Also, I think it reduces polymerization under some whacky WVO situations.

Yes, it's great, it's rugged, all that. Direct injection is slightly more efficient, though.

I was asking so that the answer might aid the research I've been doing on the effects of WVO on these engines. I'm asumming that DI sprays the pattern directly into the CC, correct? While IDI sprays the pattern into the prechamber, which relays it into the CC. If this is true, it would explain the claim of DI being more efficient, for there is one less variable involved. Thank you, guys.

...and in that case, what does TDI stand for?

yeah, and also, DI has a better power curve.
 

due mostly to the fact that the combustion can expand directly onto the piston. with PC combustion must flow through the PC tube or whatever orifice it uses to pass into the CC.
I do like the piston burn protection and ... "quiet" combustion? anyway.
John

piston burn protection...since the fuel is not sitting in the CC, right?

Turbo Direct Injection i belive..

Well...
 

More like since fuel is getting spread around by the PC ball. before getting to the CC. a nailing DI fuel squirt can put a lot of HOT fuel in one spot on the piston and cause meltdown...
John

Ahhh. TheDon, I checked out BHD's site this week. Pretty cool. ow long has that been up?

Does that refer to the fact that the engine is a turbo? If so, would my 300d be a TIDI?:silly:

according to wikipedia TDI is Turbo Direct Injection.. i guess i was right.. and TIDI i guess

I actually had this happen on a C7 Cat once. Had it not been under warranty, things would have gotten real expensive real fast.