SuperSigma2 AM PMS – V1.5.6 17-1-2020 Page 34 (97) ©2019 DMC GmbH Herten Germany
Situation 6: “M3-2T Control Mode “Spd/Torq”” = 2 (Torque control mode with Speed Control Mode at the
end of braking) and “M3-4T Hill hold ”Off/HH/S”” =1 (Hill Hold)
In this case the controller acts to control the torque in normal drive and to control the speed at the end of braking. Since
hill hold is selected, the parameters “M1-19T Hill hold time ”HHTime””, “M1-20T Restraint hill hold speed ”HHspeed””
and “M1-21T Restraint hill hold torque threshold ”HHTrqTH”” will be active.
The sequence of operation of the “end of braking” function is represented in the following figure.
End of braking in Torque control Mode with Speed Mode at the end of braking and hill hold enabled
The following list describes the “end of braking” steps:
1. the speed decreases according to “M1-7T Neutral Brake torque “NBrake”” (if neutral braking is happening) or to
“M1-13T Foot brake torque “FBrake”” and the “Brake pot %” value (refer to “M1-54T Brake pot minimum
“BrkMin”” and M1-55T Brake pot maximum “BrkMax””) (if foot brake is operated);
2. when speed is below setting “M1-15T Speed threshold to enter end of braking mode ”SpdThEbM””, the
controller reduces brake torque in a smooth way (proportionally to speed) to assure a smooth stop operation;
3. when speed is below “M1-18T Zero Speed Threshold to enter hill hold or neutral brake end ”ZSpdTh””, the
controller starts to control speed, slowing linearly down to zero according to “M1-16TSpeed threshold Ramp
time to zero speed ”SpdRmpTm””.
4. when the vehicle stops, it enters in Hill Hold mode and is held still until “M1-19THill hold time ”HHTime”” time
is elapsed. The vehicle is kept still by means of speed control algorithm;
5. when “M1-19THill hold time ”HHTime”” is elapsed, two situations are possible:
I. if the vehicle is on a slope it will roll (back or forward according to the slope) at “M1-20T Restraint hill
hold speed ”HHspeed”” until level ground is detected, then it stops moving.
II. If the vehicle is already at level ground the vehicle is held still.
Level ground is detected when actual torque drops below “M1-21T Restraint hill hold torque threshold
”HHTrqTH””.
6. The controller keep pulsing until handbrake input (digital input 7) becomes active. Otherwise the controller never
stops pulsing until it is switched off! If digital input 7 is select as speed input 3 it never stops pulsing even if this
is activated.
• VERY IMPORTANT: If the braking has been commanded by setting the direction switches to neutral
the step 4) of the above list use a different time. In other words the hill hold time is ignored and
the “M1-9T Neutral brake-End delay “NBrkEnd”” time is used. After that time the vehicle will roll
on the slope at the restraint hill hold speed.
• VERY IMPORTANT: Take care of consideration at step 6).
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