KMS MP25 - Page 29

KMS MP25(M)/MA25(M) manual Version 4.2
29
Overrun Throttle pos:
Below certain throttle positions, combustion changes to such an extent that the exhaust gas
contains a relatively high amount of oxygen. A lean mixture is registered by the lambda sensor,
although that is not necessarily the case. Under these conditions it is therefore preferable to
deactivate the air fuel ratio control loop.
When the throttle position is less than this value (TPS) input here, the air fuel ratio feedback
control will be deactivatedd. Make sure this value is always set higher than the Fuel Cut Off value.
For example a value between 0.5 - 1.5 (depending on your FCO-value).
Overrun RPM turn on:
In case of overrun (TPS < overrun throttle position) with the engine speed below a certain threshold,
it is desirable to activate the air fuel ratio feedback control again. This will usually have to be set
to an rpm of 200 to 1000 above idle rpm.
Overrun Lock time:
When an engine recovers from throttle overrun, it is usually necessary to wait a while before
reactivating the A/F ratio feedback control in order to allow the engine to stabilize. This delay can
be input here.
Recommended 0.3 - 1.0 sec.
Minimum watertemp control on:
The coolant temperature above which the A/F ratio feedback control activates.
If a KMS UEGO lambda controller is used, the lambda control can already be activated at cold water
temperatures. If your using a standard BOSCH lambda sensor (narrow band) is used, it is
recommended to activate the lambda control only above a water temperature of 60°Celsius.
Delay from start to on:
Oxygen sensors require a certain warm-up time after engine start.
During this warm-up period, the A/F ratio feedback control cannot function. The warm-up period in
seconds can be set here.
KMS UEGO recommended time: 10 - 15 sec.
Standard BOSCH recommended time: 20 - 30 sec.
Max % inc. in Fuel:
Specifies the maximum positive (increase) injection compensation.
Max % dec. In Fuel:
Specifies the maximum negative (decrease) injection compensation