Documentation: update AT shift rules, add AT shift loss model

Documentation/User Manual/1-user-interface/H_GBX-Editor.md

@@ -2,7 +2,7 @@
 
 
 
-![](pics/GBX-Editor.jpg)
+![](pics/GBX-Editor.png)
 
 
 ###Description

Documentation/User Manual/3-simulation-models/GearShift_AT.md

@@ -9,12 +9,14 @@ Gears are shifted sequentially:
 
 ###Upshift rules
 
-+ If engine speed in the next gear (see shift sequence) is above the upshift line AND
-+ The engine can provide at least the same power as currently required (i.e., can keep the current acceleration)
++ If engine speed and engine torque in the next gear (see shift sequence) is above the upshift line AND
++ the acceleration in the next gear is above a certain threshold if the driver is accelerating, i.e., acceleration_nextGear > min(Min. acceleration threshold, Driver acceleration)
+
+The user interface allows to enter two acceleration thresholds, one for locked gear to locked gear shifts and another vor converter to locked gear shifts. For converter to converter shifts the latter threshold applies.
 
 ###Downshift
 
-* If the engine speed falls below engine's idle speed
+* If the engine speed falls below the downshift curve
 
 * Drivetrain in "Neutral" when either
    	- velocity < 5 km/h
@@ -24,4 +26,5 @@ Gears are shifted sequentially:
 ###Shift parameters
 
 - Min. time between two consecutive gearshifts.
-
+- Min. acceleration after gearshift for L to L gear shifts
+- Min. acceleration after gearhsift for C to L (and C to C) gear shifts

Documentation/User Manual/3-simulation-models/Gearbox_AT.md

@@ -14,3 +14,27 @@ For AT gearboxes using power split the torque converter characteristics already
 
 The .vmod file for vehicles with AT gearboxes contains an additional column that indicates if the torque converter is locked or not.
 
+###Gearshift losses for AT Gearboxes
+
+For AT gearboxes the losses during a power-shift are modeled according to the following equations
+
+####Basic assumptions
+
++ Only power-shifts with positive power at gearbox output side are considered. 
++ Both upshifts and downshifts with positive power at gearbox output side have to be considered.
++ The power at gearbox output side is assumed to be constant during a power-shift
+
+
+####Power-shift loss computation
+
+Model parameters: shift time ($t_s$), inertia factor ($f_I$)
+
+![Engine speed, clutch speed during power-shift](pics/powershiftlosses.png)
+
+$T_{PS,loss} = |(T_{GBX,in} + T_{inertia}) * \Delta\omega_F| * t_s / dt$
+
+$T_{inertia} = f_I * I_{engine} * \Delta\omega_I / dt$
+
+$\Delta\omega_I = \omega_{engine,1} - \omega_{engine,2}$
+
+$\Delta\omega_F = (\omega_{engine,1} - \omega_{engine,1^*}) / 2$