atomization enhancement

Greg Hermann bearbvd at sni.net
Sat May 1 14:10:56 GMT 1999


>"David A. Cooley" wrote:
>
>> Most injectors will go to 80 maybe 100 PSI differential tops across them
>> before they will either stick fully open or stick fully closed.
>
>    How does the increased pressure affect control of the pulsewidth, if
>at all?
>
>James Ballenger

Flow through an injector per unit time will vary directly with the square
root of the pressure across it. "Pressure across it" means the arithmetic
difference between the gauge pressure in the fuel rail and the gauge
pressure in the manifold at any given condition.

At very short pulse widths, the higher pressure will affect the opening and
closing characteristics of the injector enough that things will not be
quite this simple.

Kinsler FI has done a bunch of work with running injectors at high pressures.

Regards, Greg





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