DI Engines 1

[AlexNeo]

hi!!

will DI engines ever be used in the US? NOx is a catalyst problem. but are there any developments in the field of catalysts that will solve the probelm?

HC's and particulates are related to in-cylinder phenomena such as wall wetting, pool fires and insufficient time for oxidation of particulates etc. there is lot of reserach going on to identify methods to eliminate these causes. but how long will the auto industry fund DI research projects? is it true that ford and GM are trying to cut spending in DI research? have they given up on DI research?

cadillac claims to have a v-12, 750 hp DI with more torque, fuel economy and low emissions. but they havent said how they achieved all three. its for their new concept car which they claim is inspired by the F-22 fighter aircraft.
it also has cylinder de-activation.

 

[bobqzzi04]

VAG makes a 2.0 liter 4 cylinder DI engine in Europe that uses a stratified fuel charge. The US version is due in 2006, but won't have a stratified injection mode due to the aforementioned emissions problems.

 

[riktoo]

thermal losses are reduced by using thermal barriers ie. :ceramics on pistons tops and comb. chambers.Combustion improves and particulates are reduced.
Combining ceramics with high pressure DI for better atomisation will improve efficiency still and cats can be left out as they are only a stop gap measure.

SPEED+++++