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Direct Measurement of Engine Emissions

Fourier TransformInfrared Spectroscopy (FTIR)Having the advantage over many analyzers by providing a direct measurement that speciatescomponents within the sample matrix without removing water from the gas stream.

AVL Micro Soot Sensor (MSS)Measuring soot in transient conditions by sensing the acoustic signature of soot particles excited by a laser. This method allows continuous real-time measurement.

NOx/O2 SensorSensor installed into the exhaust to measure nitrogen oxides and oxygen concentration, Air/Fuel ratio. Using this sensor to measure these parameters provides a check against measurements obtained with the FTIR.

Data LoggingEngine operation and control data can be logged by plugging in to the engine manufacturer’s “OnBoard Diagnostic “ tool (OBD), a standardized digital interface with the engine for accessing operational data. This data may include speed, load, fuel consumption and other parameters that can be correlated with emissions measurements.

18 Gaseous Emissions Measured

NitrogenOxide

Carbon Monoxide

Propylene

Nitrogen Dioxide

Methane Diesel

Nitrous Oxide Ethane Formaldehyde

Ammonia Acetylene Acetaldehyde

Water Ethylene Formic Acid

Carbon Dioxide

Propane Methanol

Instruments

Heated Sampling Line Switching Solenoid Valves

Enable Sampling From Upstream and Downstream

of the DOC, Plus Crankcase Blowby

Soot Emissions

NOx SensorGaseous Emissions

Sampling Probes Installed Into the Diesel Oxidation Catalyst (DOC) Aftertreatment of the

Exhaust System

Continuously Purged Enclosure Suitable for Use in Class 1 Div 2

Hazardous Environment

Soot consists of the solid carbon portion of

Particulate Matter (PM) which comprises the majority of PM mass. The remainder is a

Soluble Organic Fraction (SOF), unburned

constituents of fuels andlubricants, along with sulfate produced by oxidation of sulfur

present in fuel.

Soot

Exhaust Aftertreatment

Tailpipe Exhaust

Engine-Out Exhaust

Intrinsically Safe InstrumentationEmissions Measurement System

Many Other Gas Can Be Measured