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NI Combustion Analysis System Software (formerly DCAT and µDCAT) Features:

 
License Version
Highlighted Features
Development
Deployment
  • Open source example projects for integration with real-time control applications
X
 
  • Next-cycle control capabilities
X
 
  • FPGA-based high speed signal processing
X
 
  • Low-cost, feature-rich, turnkey bundled system
 
X

 
License Version
Measurement Configuration and Engine Geometry
Development
Deployment
  • Individual channel scaling features
  • Cylinder Assignment
  • Gain
  • Gain + Offset
  • Polynomial
  • Table Lookup
X
X
  • Channels can be assigned to all cylinders as references such as pegging
X
X
  • Simultaneous engine-synchronous and engine-asynchronous measurements 
X
X
  • Medium Speed Data (Sampled at a fixed frequency ~1kHz or less)
  • Thermocouples
  • Slow Speed Pressures
  • Other
X
X
  • Supports FPGA Data (Sampled based on FPGA setup, engine synchronous and/or asynchronous)
X
 
  • Digital outputs for sample clock and active high during logging
X
X
  • Supports multiple S-Series Cards for simultaneous sampling of signals in both engine-synchronous (cylinder pressure, etc.) and engine-asynchronous (knock, etc.) domains
X
 
  • Supports 1 M-Series device for multiplexed sampling of signals engine-synchronously (cylinder pressure, etc.)
X
X
  • Supports 1 cDAQ chassis and multiple C-Series Cards for simultaneous sampling of signals in both engine-synchronous (cylinder pressure, etc.) and engine-asynchronous (knock, etc.) domains
X
X
  • Support for mapping calculated parameters to analog output channels
X
X
  • Complete set of engine geometry inputs for cylinder volume calculation
  • Optionally load volume from file
X
X
  • Online motoring test assists with engine geometry verification
X
X
  • TDC probe channel configuration and analysis
X
X
  • Allows online adjustment of TDC index (< +/- 2 CAD)
X
X

 
License Version
FPGA-Based Engine Position Tracking and Sample Clock Generation
Development
Deployment
  • Use traditional optical encoder setup with advanced triggering options
X
 
  • Flexible crankshaft encoder signal processing and filtering
X
 
  • Use of pressure signal for 4-stroke cam phase information
X
 
  • Use of cam phase signal as half-cycle gate for TDC index
X
 
  • Use of Engine Position Tracking (EPT) block for extrapolation of lower resolution production trigger wheels for high-resolution sampling and control
X
 

 
License Version
File Saving
Development
Deployment
  • Supports simultaneous streaming of raw and summary data to TDMS file continuously, by cycle count, time, or file size
X
X
  • Raw data files include channel configuration, engine geometry, and test data to allow full reconstruction of the test environment in post-processing
X
X
  • Supports an external hardware trigger for file saving
X
X
  • Saves all non-NI-CAS Software related Calpoints, e.g., engine controls
X
 

 
License Version
Pre-Processing
Development
Deployment
  • Cylinder alignment of data in both engine-synchronous and engine-asynchronous domains
X
X
  • Data scaling to engineering units
X
X
  • Broad range of signal filtering options
X
X
  • Cylinder pressure pegging options
X
X
  • Optional user developed LabVIEW™ VI
X
X

 
License Version
Pressure Metrics
Development
Deployment
  • Peak Pressure and Location
X
X
  • Polytropic coefficients of compression and expansion
X
X
  • Maximum Rate of Pressure Rise and Location
X
X
  • Pressures at IVO and EVC
X
X
  • Gross IMEP, Pumping MEP (PMEP), Net IMEP
X
X

 
License Version
Heat Release Analysis
Development
Deployment
  • Methods include
  • Single Zone
  • Single Zone Dual Transducer (for pre-chamber engines)
  • Single Zone + Heat Transfer
  • Single Zone Dual Transducer + Heat Transfer
  • Modified Rassweiler and Withrow
  • Pressure Ratio
  • User developed LabVIEW™ VI
X
X
  • Locations of Mass Fraction Burned (5%MFB, 25%MFB, 50%MFB, 75%MFB, 90%MFB, Custom)
X
X
  • Maximum heat release rate and location
X
X
  • Variety of heat transfer correction methods
X
X
  • In-cylinder temperature estimation
X
X

 
License Version
Engine Noise and Knock Analysis
Development
Deployment
  • Raw, time-domain-filtered and angle-domain-filtered noise indication
X
X
  • Bandpass / Rectify / Integrate / Compare (BRIC) algorithm for knock signal processing
X
X
  • Visual FFT analysis of knock signals for calibration of BRIC
X
X

 
License Version
Additional Calculations and Analysis
Development
Deployment
  • Injection parameters of timing, duration and quantity (mg/injection)
X
X
  • Cycle to cycle injection quantity (mg/cycle)
X
X
  • Ignition parameters of timing and dwell
X
X
  • Multi-strike analysis
X
X
  • Cam phase measurement
X
X
  • Optional user developed LabVIEW™ VI
X
X