AFM measurement/backpressure (was Turbo speed sensor)

[Bernd Felsche]

nacelp writes:

>> EGT is significant; the energy in the recirculated exhaust gases 
>> will increase the possibility of knock as the total energy of the
>> mixture is higher than with all fresh mixture.

>EGR, is low in O2 content, so how is it's total energy higher?.

It's hotter.

The total energy of the mixture in the cylinder is higher.

The exhaust gases are at 400C or more. The fresh air is at maybe
100C with a turbo and inter-cooler. Therefore the total energy is
greater at the end of compression, prior to the start of combustion.

You start with a hotter mixture, so you need to compensate for that
to avoid knock.

-- 
Real Name: Bernd Felsche
    Email: nospam.bernie at perth.DIALix.com.au
     http://www.perth.dialix.com.au/~bernie - Private HP
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