Combustion moteur

In-car and testbed use

For testing under the real conditions, the combustion analyzer is perfectly suited for in-car testing applications. The combination of different supported interfaces like CAN, XCP/CCP, FlexRay, any direct connection of any sensor allows acquisition of all relevant data together with the combustion cycle. The combination with INCATM via CAN interface offers a complete solution for the ECU calibration.

On the engine testbed, a combustion analyzer is a standard tool to calculate and visualize relevant physical parameters from the combustion engine and to monitor and protect the unit under the test. Different communication protocols to the control room are supported via Ethernet or RS-232 interfaces - e.g. Tornado, AVL PUMA Open. Analog output channels are of course also available.

The combustion analyzer system can be used on all types of combustion engines, such as car, truck, ship, motorcycle, power-saw, etc.

Intuitive configuration

The award-winning Dewesoft X software offers easy and very intuitive configuration process. Simply define the engine type with the number of cylinders and its geometrical parameters and you are ready to measure.

The cylinder menu offers a selection of the analog channel for each cylinder and allows you to define the alignment of the cylinder angles. In the engine setup section, additional injection channels and channels for transforming any input channel to angle based measurement can be selected.

The last step is to select the angle sensor type and define the desired output resolution (down to 0.1°). The TDC (Top Dead Centre) can be detected automatically, without firing, using the maximum pressure level or optionally with a dedicated TDC sensor.

When the configuration is complete you can select your desired calculation outputs. Overall or running-average, derivation, temperature, heat release, work, power are just some of the available possibilities.

Knocking detection

Knocking on spark-ignition internal combustion engines occur when combustion of the air and fuel mixture do not start off correctly. The robust knocking detection algorithm is based on comparing the signal before and after the TDC.

Additional math and statistics

Additional mathematics channels can be defined based on the acquired or data:

• math formulas,
• statistics,
• filters (FIR, IIR, ...)
• FFT's,
• alarm conditions and
• many others.

Calculated values may be used for optimization or other automated procedures. RAW data from sensors will always be stored and stayed intact. See Dewesoft X analysis for more information.

Post processing

Since all the RAW data from the sensors is stored in the data file you can apply all the mathematics easily later in post-processing.This allows delaying CPU intense calculations until after the measurement has finished.

The stored data can easily be export to a variety of formats compatible with today‘s most popular analysis software package like FlexPro®, MATLAB®, Excel®, AVL CONCERTOTM and many more. You can even export the whole measurement view to an AVI video file to create dynamic documentation or print a PDF report.

The data file can be viewed and analyzed on as many computers as needed without the need to purchase any additional software license form us. You can also distribute the data file outside of your company (e.g your customers) and anyone can view, reply and apply additional analysis. Simply let them download Dewesoft X software and open the shared data file.