Quote:
Originally Posted by Hersbird
Some do it with the valve timing and some just can do it with the direct injection.
These motors I think always still have a throttle body but it's for startup and if something goes wrong with the system.
Diesels have been using direction injection without throttle for a long time with no fancy valve systems. It's their direction injection that made that possible
|
This is when quoting wikipedia is dangerous, and it helps to know how engines are actually designed and what regulations do what.
I'm not going to go into why a diesel doesn't need a throttle. Diesels are direct injection by definition and that has nothing to do with a throttle.
Ever wondered why diesel engines need NOx traps? Stratified injection would need an NOx trap as well because the cat would not be able to remove NOx with lean burn. No car in the USA has stratified direct injection, the only cars in this country that run throttleless are BMW N20, N52, N55, etc. engines, Nissan VQ37VHRs, and Fiats equipped with Multiair.