[Diy_efi] Intro, and q's about fuel economy

[Alexei Pavlov]

bernie at innovative.iinet.net.au wrote:
> 
> On Mon, Dec 16, 2002 at 03:59:04PM +0100, Alexei Pavlov wrote:
> > > Or gear it so that it is close to maximum torque load at the design cruise
> > > speed, and then modulate power with the EGR instead of a throttle.
> 
> > That seems to be a good idea. Did someone try to do that at least
> > for a cruise control ?
> 
> Volkswagen and Audi use it under part-load conditions (where
> lean-burn is possible) - the throttle is fully open and EGR,
> along with stratified charge is used to determine engine output.

I presume they use exhaust gazes instead of fresh air to lower 
the NOx exhaust rate.

And has that been used on indirect injection engines ?

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