Stratified Charge DI with EGR (was: AFM

[Ade + Lamb Chop]

At 20:12 11/03/00, Mike (Perth, Western Australia) wrote:
>At 07:32 PM 11/3/2000 +0800, Bernd Felsche <bernie at perth.dialix.com.au>
wrote:
>
>>>That sounds incredible complecated... So presumuable there is no direct
>>>throttle cable... just a fly by wire pedal and ecu does the rest???
>>
>>Throttle-by-wire. The driver sets the amount of torque required by
>>the position of the pedal. The ECU adjusts throttle, EGR (up to
>>70%), injection and ignition accordingly.
>
>>The complication has its rewards; 15% less fuel consumption, partly
>>due to increased "volumetric efficiency" because the throttle is
>>often wide open... better find an updated abbreviation to replace
>>WOT!
>
>Aye - I'm a bit perplexed here, are we talking diesel if not but, talking
>petrol then I would have expected wide open throttle to consume more
>petrol due to maintaining  AFR ?

You pump exhaust gas which has virtually no air in it into the inlet this
reduces the power o/p without using petrol.

>On the occasions I have wide open throttle on my vehicle I'll either
>chew up huge amounts of fuel and/or leave rubber, but then my EGR is
>minimal...

Don't most current EGR systems use it to decrease emmisions more than
anything else? 

>By the way whats does conventional "WOT" stand for ?

Wide Open Throttle.

Ade

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