CMT unveils fuel injection emissions sensor
Condition monitoring firm CM Technologies (CMT) has added a fuel injection acoustic emission sensor to its PREMET X range of two- and four-stroke diesel engine performance indicators.
The new device allows engineers to monitor the sound of a diesel engine’s fuel injection system to detect any problems with fuel injectors, nozzles, and pumps.
“Atomisation and fuel injection timing are the most important variables in the combustion process, correlating directly with the amount of fuel consumed and carbon emitted,” explained Matthias Winkler, managing director, CMT.
“By monitoring fuel injection frequencies, we can get invaluable insight about problems with fuel injection and combustion.”
Unlike accelerometer-based sensors, which need to be mounted internally and can be affected by mechanical load, high temperatures and pressures, CMT’s sensor is based around electromagnetic acoustic transducer technology, meaning there is no need to access internal components.
Capable of monitoring frequencies in the 200-700kHz range, the sensor incorporates a built-in amplifier and signal conditioning module which can measure through coated surfaces and is unaffected by pollutants, oxidation or surface roughness.
Depending on where the sensor is placed, different aspects of the fuel injection process can be monitored.
“We do recommend that several tests are carried out at different locations for comparative purposes and different places should be tried to identify the most effective place for a measurement,” said Winkler.
“For trending of historical data, measurements should be taken regularly, from the same place,” he added.
CMT’s Fuel Injection (Acoustic Emission) Sensor is available as an option with the company’s PREMET X diesel performance monitoring system.
