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

[Greg Hermann]

At 11:47 PM 12/15/02, Perry Harrington wrote:
>> What the EGR really does is reduce the pumping losses at cruise due to
>> throttling.
>
>It's simpler than that.  The exhaust gases already have fuel in them to
>some degree.  You recycle that in place of actual fuel.  The only way to
>eliminate
>throttle losses is to have no throttle at all.  You then do the throttling via
>modulation of the valve timing.

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.

Greg



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