Avl Boost Tutorial Upd ((install)) Guide

COMMON /USER_ENGINE/ N_ENG, PMAN, TMAN, ... REAL*8 N_ENG ! Engine speed [rpm] Add this common block to your subroutine to make your model speed-dependent. Instead of just burning, you can integrate a knock integral:

! Local variables for custom model REAL*8 CA_SOC, CA_DUR, SHAPE, CUM_BURN, PI PARAMETER (PI = 3.1415926535) avl boost tutorial upd

| UPD Type | Application | Typical Use Case | | :--- | :--- | :--- | | | Combustion, heat transfer, gas properties | Custom burn rate, dual Wiebe, knock prediction | | Valve | Flow coefficients, lift dynamics | VVT control strategies, deactivation | | Pipe | Friction, heat transfer | Two-phase flow, condensation | | System | Global controls | PID controllers, plant model integration | | Booster | Compressor/turbine maps | Extrapolation beyond measured data | COMMON /USER_ENGINE/ N_ENG, PMAN, TMAN,

HR = BURN * MF * QLHV ! [J/deg]

! Error handling I_ERR = 0 TEXT = 'User model executed' Instead of just burning, you can integrate a knock integral:

SUBROUTINE USER_CYLINDER(CA, X, DX, V, DV, P, DENS, T, & MF, AF, ETAC, ETAS, QLHV, & HR, BURN, PTHB, USER_PAR, & N_UP, I_ERR, TEXT) IMPLICIT NONE REAL*8 CA, X, DX, V, DV, P, DENS, T, MF, AF, ETAC, ETAS REAL*8 QLHV, HR, BURN, PTHB, USER_PAR(*) INTEGER N_UP, I_ERR CHARACTER*80 TEXT

UPD allows engineers to embed custom FORTRAN or C/C++ code directly into the simulation model. Whether you need a custom combustion model, a unique heat transfer correlation, or a proprietary friction model, the UPD interface is your gateway.