Bosch ECU MS 25 Sport Manual page 28

2 | Starting up the ECU
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For first engine firing it is recommended to calibrate all the limitation factors to 1 and en-
sure that the CL_QTLIM is calibrated safely.
2.4.4.4 Friction Quantity
Friction quantity qfric is the fuel quantity that is needed to idle the engine under normal
operating conditions without additional accessory loads. Friction quantity is calculated by
a map MP_QFRIC as a function of engine speed and engine temperature.
Correct calibration of friction quantity is important as it is used as a pre-controller in sev-
eral other functions like low idle controller.
2.4.4.5 Low Idle Controller
Low idle controller LICO is a PID controller which is working directly with the friction map
MP_QFRIC as a pre-control input. The base set point map for low idle is
CL_NLICO_NOM_BAS, which defines the setpoint value as function of engine temperature
tmot.
If the engine friction map calibration is changed within the low idle setpoint operating
range, correct low idle controller behavior must be checked.
Engine Control Unit MS 25 Sport Bosch Motorsport