Negative enrichment during accel

[ol boy]

Running another 2 stroke twin and I'm finding that I need a slight pause in fueling as I yank the throttle open after some time of near idle condition. Both exhaust gas analyzer show an extremely rich condition until it clears out and the rpm pick up to a steady state.

I noticed you can't apply a negative PW value for accel enrichment. Is this an INI file issue or a firmware issue?

Thanks Ryan.

MicroSquirt Module, 3.3.3 code

[ol boy]

Found the answer to my question. If the PW added or subtracted was a signed 8bit (S08) instead of an unsigned 8 bit (U08) you could have a 4 point line crossing into negative values for a progress decel based on the negative rate which happens to be a signed 16 bit value. Only disadvantage is the max added accell PW would be 12.7ms instead of 25.5 but you could pull up to -12.7 PW out on quick throttle lifts.

Code: Select all

taeBins         = array ,  U08,    346,    [    4], "ms",       0.10000,   0.00000,  0.00,   25.50,      1 ; * (  4 bytes)

PW added can only be positive.

Code: Select all

taeRates        = array ,  S16,    490,    [    4], "%/s",      0.10000,   0.00000,  0.00, 2000.00,      1 ; * (  8 bytes) tpsDot bins used for AE: x for TAE interpolation

TPSdot can be both positive and negative.

Anyone out there that can make this change in the firmware so I can test this out?

Thanks Ryan