KMS MD35, Manual

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KMS MD35 manual
Version 4.16 37
Allowed band for correction map:
The 2 levels that can be selected here relate, in this case, to the deviation between actual and
nominal rpm and TPS (value set in map). Correction values are only recorded in the correction map
when the rpm and TPS comes within a specific range of the nominal value. With level 2, a 95%
accurate correction map is therefore created while a more precise one is created with level 1.
Recommended: Map the engine first on level 2. This way you can create the correction map faster.
3.2.4.1.8.5 Sample rate
Main sample rate:
Specifies the number of corrections per seconds of the
A/F ratio control.
Recommended corrections per second: 6 - 10.
Correction amplifier:
For input of the control amplifier gain. For a rapid correction to the desired target, the first step of
correction must be larger. The gain factor can be entered here.
Recommended: 1 or 2.
Advanced settings:
If the „use advance settings‟ control box is selected,
the „advanced settings‟ menu must be set.
You can set here different sample rates for various
RPM/Engine-load ranges.
In general with higher engine speeds and engine loads
the sample rate can be set higher due to more
combustions per second and higher exhaust gasflow.
If the sample rate is set too low, the lambda control does not reach the desired target in time. On
the other hand when the sample rate is set too high the lambda control will get instable.
3.2.4.1.8.6 Warm-up A/F limits
At lower engine temperatures you can set an upper limit on air/fuel ratio. Lambda-control will,
under these temperatures, not control the mixture leaner (higher A/F) than the values set in this
table.
This can be used when KMS UEGO control is set active at cold engine/water temperatures to
prevent the engine from stalling, by limiting the A/F ratio, when lambda control will try to reach a
too lean target. Most petrol engines will not run on an A/F ratio of 14.7 (λ=1) below 60°Celsius.