Quote:
Originally Posted by scarceller
YES! you got it. At cruise on level ground you are generally in the 2nd or 3rd row across all RPMs.
And again YES if everything was perfect then all cells would be 128. But Bosch designed this system to fit many different setups and be very adjustable so that's why the trim tables.
You have the basic understanding for these maps!
BTW - if someone knows the exact formula for LOAD I'd love to have it. I have seen references to the formula made and it does seem to be some sort of AFM signal divided by RPM.
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Sal,
Again, thank you for taking the time to teach me/us.
From what you are saying it sounds like the heart of the fuel deliver system then is basically a math formula to compute the quality of fuel needed for any size and performance level of motor relative to RPM, load, injector size, fuel pressure... But that is just a guess.
Might start with something like ((motor capacity / number of cylinder) x (RPM/2) x (VE))/target A/F ... and have a bunch of other variables that can be changed to fit any make up of motor.
This formula then computes the expected duty cycle at each point of operation.
Then it sounds like the Trim Table modifies the theoretical fuel delivery to the unique specifics of a motor.
