Blow–by gas has become a large contributor to the total PM emitted by engines as the tailpipe emissions from modern engines have been reduced significantly over the recent years. Blow–by gas is formed in an internal combustion engine when a mixture of gases and oil mist leak from several sources, mainly the combustion chamber. This emitted blow–by gas consists mainly of oil droplets that not only increase the total vehicle PM emissions to the environment but also contribute to the loss of lubricating oil and fouling of surfaces and engine components.
ELPI+® is a real–time particle size distribution measurement instrument for both tailpipe and blow–by gas emission measurements from different types of engines. The wide particle size range of 6 nm – 10 μm and fast time response of 10 Hz make the ELPI+® an excellent choice for real–time determination of PM levels from different conditions. The ELPI+® features include real–time stand–alone operation, wide sample concentration range, wide particle size range and robust structure for operation even in harsh conditions such as blow by gas measurements. The ELPI+® can be connected to the particle source either directly using the High Temperature ELPI+® or with a well designed sample conditioning system such as the Dekati® Diluter.
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