Cambustion are a developer and supplier of fast response emissions analyzers and provider of emissions-related testing services via their transient dynamometer facilities. Since their formation out of the University of Cambridge Engineering Department in 1987, they have developed fast response HC, NO, CO&CO2 and particulate analyzers specifically designed for studying and calibrating engines for the reduction of emissions and improved fuel economy through better quality and more effective combustion. Their test facilities which currently comprise 8 transient engine dynamometers and 1 chassis dynamometer with robot driver are used for fuel economy, emissions calibration and fuel comparison work.
They have also recently developed a particulate filter test system for assessing the exhaust pressure vs soot load of diesel and particulate filters, plus their filtration efficiency, their maximum soot load and the effects of accelerated ashing.
The fast response emissions analyzers are generally used by engine calibrators and researchers to optimise fuel injection, spark and valve timing to minimise emissions and maximise fuel economy; fast response being particularly important to assess the cycle-by-cycle effects which occur during engine start and gear changes. The gas instruments have response times fast enough to measure the gas concentrations within a single exhaust stroke but can also be configured to measure directly from the firing engine cylinder (through an offset “sampling spark plug”). This yields valuable information about fuel concentration delivery to the plug’s electrodes and also cycle-by-cycle residual gas measurement (via fast CO2).