GM Inside News Forum - View Single Post - Direct-injection engines make a comeback

Globalist · 05-23-2005, 06:23 PM

GDI is the way to go. I am wondering why nobody tried RQL (Rich-Quench-Lean) approach like in gas turbines.

You start rich, and you quench it with EGR (preferentially cooled EGR), then stage the air (through a by-pass) to complete the reaction. That's the perfect recipe for NOX reduction because cooled EGR will knock NOX and increase efficiency.

If someone tries the idea and it works. I will ask for $1/engine (produced) :-)

05-23-2005, 06:23 PM	#2 (permalink)
Globalist 5.3 Liter Vortec V8 Join Date: Dec 2004 Drives: V6 3.2 L Posts: 1,252	Re: Direct-injection engines make a comeback GDI is the way to go. I am wondering why nobody tried RQL (Rich-Quench-Lean) approach like in gas turbines. You start rich, and you quench it with EGR (preferentially cooled EGR), then stage the air (through a by-pass) to complete the reaction. That's the perfect recipe for NOX reduction because cooled EGR will knock NOX and increase efficiency. If someone tries the idea and it works. I will ask for $1/engine (produced) :-)