Combustion Analysis System

OBI-M2 is our most compact on-board combustion analysis system implemented on MIRACLE2. It is an extremely compact and fully featured combustion analysis system suitable for use on test benches and on-board, tested and validated in the most demanding racing world. It can be connected to standard crankshaft position sensors, without any crank angle adapter needed. Optional integrated charge amplifier Alfa Centauri for piezoelectric pressure sensors.

When connected to the application engineer’s laptop, OBI-M2 user interface allows real-time streaming of cylinder pressure signals over ethernet and high speed data acquisition for post-processing view and analysis.
Among its several usage patterns, OBI-M2 can be used to develop and optimize the engine calibration both on the test bench and on-board, thanks to the additional information regarding combustion. It is also a monitoring system, as OBI-M2 detects any limit value violations defined by user and saves the raw data along with a pre-event and post-event history. Alternatively, OBI-M2 is very well suited for combustion analysis and control in vehicles or motorbikes as a standalone system, thanks to its 32 GB on-board data storage.


Key Features

  • Up to 12 cylinders engine (24 analog inputs overall)
  • Direct connection to standard crankshaft position sensors, without any crank angle adapter needed
  • Extremely easy and quick installation on-board
  • Time-based combustion analysis system
  • Time-to-Angle conversion performed with the interpolation approach for the highest precision
  • Real-time, cycle-by-cycle and cylinder-by-cylinder evaluation of combustion parameters
  • Combustion parameters published via CAN and XCP on Ethernet
  • Easy integration with ETAS INCA®, VECTOR CANape® and ATI VISION®, or any environment supporting CAN and XCP
  • User interface for in-cylinder pressure and combustion data monitoring
  • Data acquisition based on analog trigger or eventbased (limit value violations)
  • Stand-alone ECU-like operation 32 GB on-board storage
  • Crank angle-based actuation tracking


  • Oscilloscope-like chart, for cylinder pressure signals monitoring, with overlap and time-based functionality
  • Main page with moving average values of combustion parameters
  • Tabs with statistical analysis (CoV, max, min, average, percentile) of combustion parameters
  • Chart with selectable combustion parameters trend over the last x engine cycles (x up to 1000)
  • Automatic TDC determination procedure, based on peak pressure angular position monitoring during misfire or motoring, with loss-angle input from the user. Alternatively with capacitive TDC sensor
  • X-Y graphs with IMEP vs MFB50 and MAPO vs MFB50 (X and Y axis can alternatively be defined by user)
  • All parameters are tunable from the user interface and then downloaded on the real-time unit for standalone operation
  • Unlimited acquisition on host PC of high frequency data for off-line analysis 
  • Synchronous acquisition of cycle-based data and high frequency data on separate files for easy viewing and reporting

Ask us more info

Alma Automotive s.r.l.

Via Terracini 2/c - 40131 Bologna - Italy
Tel. +39.051.9923806 / +39.051.0548470
Fax +39.051.0544839

Our locations

Via Terracini 2 , 40131 Bologna

Via Provinciale Bologna 28/30
40066, Pieve di Cento (BO)


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Gli aiuti di Stato e gli aiuti de minimis ricevuti dalla nostra impresa sono contenuti nel Registro nazionale degli aiuti di Stato di cui all’art. 52 della L. 234/2012 e consultabili qui

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