Dyno DataMite Enterprise Edition: The Enterprise Edition adds advanced features to the already powerful Professional version of the Dyno DataMite software. At this time, there are 4 major enhancements beyond the Pro version, including: - Reading OBD2 data from the vehicle controller. - Include a picture of the engine you are testing. - Averaging Power Runs together. - Allowing for doing an accelerating and then decelerating portion of a power run, and using the decel portion to estimate losses in the system. Reading OBD2 Data: OBD2 was a requirement for all light duty vehicle manufacturers starting in 1996. Therefore, most modern vehicles have an OBD2 connector and can provide this data, as shown below: The channels which can be chosen at this time include: Coolant Deg F Coolant Deg C Fuel Pres PSI Fuel Pres KPa MAP PSI MAP KPa Eng RPM Speed MPH Speed KPH Ign Timing Int Air Deg F Int Air Deg C Mass Air lb/hr Mass Air gm/sec Throttle % Throttle Deg Note: This list is likely to grow. However, not all vehicle controllers support all channels listed here. OBD2 data is very handy on chassis dynos, where you typically have a modern engine controller, and can not quickly install and remove additional sensors for quick vehicle testing. One important use is to record engine RPM for the dyno test via OBD2 instead of a tach signal, inductive pickup, optical sensor, etc. These other methods do work, but may require some tweeking to work in all situations. OBD2 Link, Part #: DT4-OBD2 OBD2 data can NOT be recorded at a very fast rate, about 10 data reading every second. This is a limitation of the OBD2 function on the controller. Therefore, if you request 5 OBD2 channels to be read, you will only get 2 readings from each channel every second. If you require faster OBD2 data, you must reduce the number of channels requested. Graph below shows 3 OBD2 channels of Engine RPM (blue), Ignition Timing in degrees (light blue), and Mass Air Flow in gm/sec (red). Included for comparison is Engine RPM recorded via an inductive pickup in green. You will see how the OBD2 channels are recorded only every 0.3 seconds, with straight lines connecting these data points. The green DataMite engine RPM reading is updated 50 times each second, and is a more fast responding, accurate reading. You will notice that it is ahead of the blue OBD2 Engine RPM reading. Please follow this link below for additional information. performancetrends/Dyno-DataMite-Enterprise-Edition-OBD2.htm
Posted on: Fri, 31 Oct 2014 21:16:49 +0000
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