catool 0.9.4 - bug reports, feature requests
catool 0.9.4 should hopefully be released Q2 2008. If you have any bug reports or feature requests please let me know (
).
Confirmed fixes/features are:
- Determine cylinder number from channel name during import
- Fix IFile channel type
- Fixes to TLA calculation
- Implement 98% MFB
- Implement Burn duration calculation (0-2, 0-5, 0-10, 0-90, 2-90, 5-90, 10-90%)
- Implement Net and Pumping IMEP calculation
- Thrifted IVO and EVC cam timing parameters
- Speed improvements
catool 0.9.3 released
catool version 0.9.3 has finally been released. Changes include:
- Multithreading capable using the pthreads library (Windows and UNIX)
- Fixes to heat release and IMEP calculation
- Fixes for big-endian and 64-bit architectures
- General bug fixes and speed improvements
The download page is here.
Converting AVL I-File data to MATLAB
catool can be used to convert raw combustion data in AVL I-File format for later analysis in The MathWorks' MATLAB.
The following configuration file will load an AVL I-File (avl_ifile.001) and output a MATLAB file (avl_ifile.mat).
catool can perform the relative to absolute pressure correction using the polytropic indices and crank angle range specified in the AVL I-File. To do this uncomment the three lines (channel-offset, analyse and run-analysis).
input-file-type AVL_IFILE
input-file avl_ifile.001
load-channels all
CAT configuration file syntax
CAT configuration files are human-readable ASCII with the suggested file extension of .ccf.
Parameter: analyse analysis_type
Configures which analysis routines are to be performed. The special types of 'all' and 'none' are available. Preceding the cycle type with a '-' will prevent that analysis from being performed. For example:
analyse all -WIEBE_A -WIEBE_M
will perform all analysis except the Wiebe a and m parameter calculations.
Valid analysis types are:
BURN_ANGLE_1
BURN_ANGLE_2
BURN_ANGLE_5
BURN_ANGLE_10
BURN_ANGLE_20
BURN_ANGLE_25
CAT
A range of software for the design and development of automotive powertrain systems, including a low-cost internal combustion analyzer for engine analysis.
CAT is a command line tool for the analysis of recorded internal combustion engine pressure data. Data can be imported using AVL I-File or CSV format. The software provides absolute pressure correction and four-stroke TDC correction.
Absolute pressure correction can be carried out using a number of methods:
Literature
Brown, B. R., "Combustion Data Acquisition and Analysis," M.Eng. Automotive Engineering Thesis, Loughborough University, 2001. [1.21MB]

