ECU Master EMU User Manual page 97

Engine management unit
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PARAMETER
Idle valve type
Frequency
Stepper steps range
Reverse
Idle PWM output
Idle PWM output #2
Idle control max RPM
Afterstart RPM
increase
Afterstart duration
Idle On if TPS below
Idle Off is TPS over
Increase idle above
VSS
VSS idle increase
value
DC during cranking
DESCRIPTION
On/Off - the simplest valve which is opened when engine is cold and
closed after warm-up.
PWM - valve which increases air flow with Duty Cycle of PWM
controlling signal.
Stepper - bipolar stepper motor ( 4 wire ),
3 Wire PWM - PWM valve with two coils,
Unipolar stepper - unipolar stepper motor ( 6 wire),
DBW - idle control implemented with Drive By Wire electronic throttle.
Ignition cut - idle is controlled by regulating executed spark percent
with Idle ign. cut table
PWM frequency for idle valve or stepping signal frequency for stepper
motor
Stepper motor range defined in number of steps. Stepper motor is
calibrated with each EMU startup
In case of PWM valve, checking this function inverts Duty Cycle of
signal. When stepper motor is used, stepper rotation direction is
reversed
Output used to drive the PWM valve
Output used to drive second wiring of two-coil valve (3 Wire PWM)
RPM limit reached to disable idle control
Defines target idle RPM increase during after-start period
Duration of after-start period with increased idle RPM
Idle control is activated when Throttle Position Sensor signal drops
below this value
Idle control is deactivated when Throttle Position Sensor signal rises
above this value
Defines minimum Vehicle Speed to activate increased idle RPM
function
Amount of idle RPM increase implemented when Vehicle Speed
exceeds Increase idle above VSS parameter.
Defines idle device Duty Cycle for engine cranking. In case of stepper
motor, stepper position is calculated as DC * Stepper steps range. In
case of Drive By Wire, idle throttle opening angle is calculated asDC *
Page 97

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