The latest documentation is available here:

Some background information of combustion analysis is here:
Brown, B. R., "Combustion Data Acquisition and Analysis," M.Eng. Automotive Engineering Thesis, Loughborough University, 2001. [1.21MB]

Converting AVL IFile data to MATLAB

catool can be used to convert raw combustion data in AVL IFile format for later analysis in The MathWorks' MATLAB or GNU Octave.


1) Create a directory to store the catool files such as 'C:\Program Files\MATLAB\Rnnnn\toolbox\catool'. When Rnnnn is the MATLAB version, for example R2007b.

2) Extract the files from the 32 or 64 bit version of catool and load_ifile.m script to the above toolbox directory.

3) Add the above path: (at MATLAB prompt) addpath('C:\Program Files\MATLAB\Rnnnn\toolbox\catool')

4) Save the path: (at MATLAB prompt) savepath

5) Load the data: (at MATLAB prompt) ifile = load_ifile('avl_ifile.001',1)

6) Plot the data: (at MATLAB prompt) plot(ifile.CYLPR1.axis,