Cambustion Gas Analyzers

For over 20 years Cambustion has remained the recognised world leader in the design and manufacture of fast gas analyzers for engine emissions measurement.

Conventional Emissions Analyzers

Transient engine dynamometer
Typical exhaust analyzers used in engine R&D offer time responses (T10-90%) of 1 second. Since internal combustion engines may operate at 10s of firing cycles per second, a conventional analyzer is incapable of giving information about individual combustion events. Cambustion's fast gas analyzers offer industry standard detection techniques (FID for hydrocarbons, CLD for NOx and NDIR for CO & CO2) coupled with patented sample handling to offer time responses ranging from 1ms to 10ms.

Need for fast response Emissions Analyzers

As emissions restrictions tighten and engine control techniques become more sophisticated, the advantages of using fast gas analyzers are more compelling. Historically engine calibration has focused on steady state conditions where conventional analyzers give accurate measurements of average emissions. Transient calibration uses models for engine processes, but without measured data to support these models they may fail to give good results under certain conditions. As the permissible emissions level fall, short lived spikes of high emissions during transients becomes more significant.

Different markets and product types around the world utilize different drive cycles for emissions standards, including the NEDC (European), FTP Transient (US), and Non-Road Transient Cycle. Although the cycles differ greatly, they all contain significant periods of transient operation. Any development and optimization to meet these cycles must take account of the contribution toward total emissions from the transient operation conditions.

The application of Cambustion equipment to identify these high emission states and identify the underlying combustion processes which cause them shows the engine calibrator the way to reduce emissions. Such work has significant cost benefits- ranging from reduced program times to reduced precious metal requirements on after-treatment.

Full range of analyzers

Cambustion offer stand-alone analyzers for HC, NOx and CO & CO2, and these may be used together for enhanced information- e.g. HC and CO & CO2 data during gasoline cold start for accurate measurement of lambda.

Cambustion gas analyzers include support for the AK protocol, allowing control of the analyzer via the test bench if required.

For more information on our analyzers, please visit the products pages.