New Cylinder Pressure Monitoring Products from Imes

German cylinder pressure measuring specialist Imes has introduced three important new capabilities to complement the basic evaluation and visualisation software package it supplies with every EPM-XP hand-held electronic pressure indicator.

Trending function

A new trending function for acquired data allows up to 32 data files to be superimposed for comparison on the computer screen, as a means of detecting changes in engine performance over a chosen period of time. In this way, the add-on function substantially simplifies the task of monitoring engine condition and cylinder outputs.

Calculation of specific fuel consumption

In a function that will become increasingly important as the IMO Tier III emissions regulations approach, Imes has introduced a specific fuel consumption (SFC) calculation option for the EPM-XP software package. The option allows engine power to be calculated on the basis of values for mean effective pressure derived from cylinder pressure data acquired by the EPM-XP device. Thereafter, the mass of fuel consumed by the engine, as acquired from fuel flow meters recording over the same period as the EPM-XP electronic indicator, is factored into the equation to give a value for specific fuel consumption in g/kWh.

Data acquisition at eight load steps per cylinder

A further add-on function now gives the EPM-XP the capability to record up to 160 measurements at seven pre-set and one freely selectable engine load step in a range between 25% and 110% of the engine’s rated output. Cylinder pressure data can be thus acquired at eight load points on engines with up to 20 cylinders, for example. 

Imes reports that these add-on functions are activated by insertion of a USB “dongle” into the PC or notebook running the Imes evaluation and visualisation software.

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