[DML] Re: Automaitc Transmission Shifting
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[DML] Re: Automaitc Transmission Shifting



--- In dmcnews@xxxxxxxxxxxxxxx, "Steve" <p2freak@...> wrote:
>
> Group,
> 
> Want to pick your brains here, especially the mechanical types.  
> 
> Suppose I have a field programmable transmission governor/computer.  
> Goal:  Want to get max acceleration (0-60 mph).  
> 
snip.

If your goal is max acceleration, pick your shift points so the engine
is near the peak power point all the time.  You need to know the
transmission ratios to do this right, but the gist will be that you
will shift gears after the peak power rpm.  

Before the shift the rpms will be higher than the peak power rpm. 
After the shift, the rpms will be lower.  The peak power rpm should be
approximately the average of the rpms before and after the shift,
ignoring a few fine points.  Chances are you'll be flirting with
violating a redline to do this as the peak power rpm is often very
close to the redline rpm.

In an ideal world, for max acceleration, you'd just have a continuous
transmission that held the engine at its peak power rpm every
millisecond from 0-60, but this world isn't ideal.

Have fun.




> Steve
> VIN#04421
>




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