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Summary of change:
'' '''Engine Coolant Temperature Related Configuration Parameters''' '' * Traditionally coolant temperature range was -40..+102C, and had to be selected at firmware upload time. ** Since many engines regularly exceed 102C coolant, installers often cheated and uploaded 1900/256 hexfile instead of 2252/256 so the reading is appr 10C lower around 100..110C (this extended the range to 112C) * With '''1.1.50''' or newer firmware, one can '''select Celsius''' (not Fahrenheit) based coolant table during firmware upload (eg. 2252/256). This way the '''maximum coolant temperature is 155C''' (range is -100C .. +155C). LCD and VemsTune / MegaTune communication was changed to reflect this(and show temperature that matches the internal representation) The ''flash table'' is chosen below in the ''settings/constants'' dialog: http://vems.hu/download/v3gui/images/VemsTune-constants-dialog.JPG Alternatively, the ''17-point curve'' can be chosen. When the 17-point curve is chosen, coolant (and MAT, in a similar fashion) can be configured with a 17 point table. Remember this is with 1.1.50 or newer firmware. http://vems.hu/download/v3gui/images/VemsTune-coolant-curve-dialog.JPG Some '''values''' that work for some NTC sensor are noted on the left * is this the popular 2252 Ohm curve or the curve for slightly higher resistance sensor the firmware used to be released with traditionally ? * This can be used as a '''starting curve'''. * we should copy files containing config-dump parts to the relevant directory so new entry appears in the dropdown at lest for the most popular sensors. While the traditional flash table must be selected at firmware upload time, this 17 point curve can be adjusted later, and easily matched even to special-custom setups without programming knowledge. [http://megasquirtavr.sourceforge.net/manual/Detailed.Sensor.Coolant.html#Config [Manual: Detailed.Sensor.Coolant.Config]] ---- '''See also''' * GenBoard/Manual * GenBoard/Manual/Config * GenBoard/Manual/IntakeAirTemperature
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