Setpoint for air mass from the desired torque (MDFUE)
From Nefmoto
This is a translation from the Funktionsrahmen
MDFUE abbreviations
| Parameter | Source-X | Source-Y | Type | Designation |
|---|---|---|---|---|
| CWRLAPPL | FW | Code word input rlsol_w during application phase | ||
| FRLMNHO | FHO | KL | Correction factor rlmin of the amount | |
| FWPEDRLS | FW | Factor for direct rlsol-entry from wped (Application) | ||
| KFMIRL | NMOT_W | MISOPL1_W | KF | Map for calculating desired charge |
| KFRLMN | NMOT | TMOT | KF | minimum charge in the fired operation |
| KFRLMNSA | NMOT | TMOT | KF | minimum rl with overrun fuel cut |
| RLSOLAP | FW | Nominal charge for administration purposes | ||
| ZKDRLSOL | FW | time constant for drlsol-integrator | ||
| Variable | Source | Type | Designation | |
| B_MDMIN | MDFUE | AUS | Condition minimum attainable indexed torque achieved | |
| B_SA | MDRED | EIN | Condition Overrun fuel cut | |
| C_INI | EIN | SG-condition initialization | ||
| DRLSOLF_W | MDFUE | AUS | filtered change desired charge | |
| DRLSOL_W | MDFUE | AUS | Change desired charge | |
| ETALAB | MDBAS | EIN | Lambda efficiency without intervention, based on optimum torque at lambda = 1 | |
| ETAZWBM | MDBAS | EIN | averaged ignition angle of the basic ignition angle | |
| FHO | GGDSAS | EIN | Height correction factor | |
| MILSOL_W | MDKOL | EIN | Driver torque request for filling | |
| MISOPL1_W | MDFUE | LOK | Target air torque, calculated back to lambda = 1 and zwopt | |
| NMOT | BGNMOT | EIN | Motor speed | |
| NMOT_W | BGNMOT | EIN | Motor speed | |
| RLMAX_W | LDRUE | EIN | maximum possible load, for Turbo | |
| RLMIN_W | MDFUE | AUS | minimally acceptable rl | |
| RLSOL_W | MDFUE | AUS | Nominal charge | |
| RLTEDTE_W | DTEV | EIN | From DTEV relative charge calculated on the tank vent valve | |
| R_T10 | EIN | Time frame 10ms | ||
| SY_TURBO | PROKONAL | EIN | Turbocharger system constant | |
| TMOT | GGTFM | EIN | Motor temperature | |
| WPED_W | GGPED | EIN | Normalized accelerator pedal angle |
MDFUE Function Description
The torque msol_w that is to be set on the charge path at base ignition and base efficiency is translated, in torque misopl1_w, which corresponds to the optimum torque for lambda = 1. With the help of the characteristic map KFMIRL obtain the charge, which is part of this operating point.
This charge is limited to the minimum permissible value rlmin_w, in this case, the idle speed control, the Condition B_mdmin set, which then stops the integrator. In the case of a turbocharger is a limit to the maximum permissible charge rlmax_w. Naturally aspirated engines that size does not exist!
Result ones their desired charge rlsol_w.
Addition of application-interface:
CWRLAPPL = 0: fct. as before: rlsol generated from the limited KFMIRL. CWRLAPPL.1 =1: rlsol_w = RLSOLAP CWRLAPPL.2 =1: rlsol_w = wped_w * FWPEDRLS
MDFUE Application Notes
The map KFMIRL is inverse to the map KFMIOP in the section %MDBAS. Application information %MDBAS.
Special thanks to phila_dot for translating this section.
