PPubMed4 Oct 2019Cited 3×

Development and implementation of virtual instrumentation based on LabView applied to compression ignition engines operated with diesel-biodiesel blends

Armando Pérez, Gisela Montero, Rogelio Ramos Irigoyen, Conrado Garcia, Marcos Coronado, Jose Rodriguez

Abstract

'Conrado Garcia' 'Marcos Coronado' 'Jose Rodriguez'] Title: Graphical abstract

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A LabVIEW‑based virtual instrumentation suite was created and validated for measuring temperature, RPM, fuel use, O₂ and NO emissions of a diesel‑biodiesel engine.

What’s new

i.Developed a suite of LabVIEW 2015 virtual instruments (VIMT, VIMRPM, VIMFC, VIMO, VIMNO) for engine monitoring
ii.Implemented hardware integration using NI DAQ 6009 and a Fluke 500A calibrator
iii.Designed and incorporated a heat‑exchanger system to keep exhaust gas temperature below sensor limits
iv.Validated the system on a 4‑cylinder compression ignition engine using diesel‑biodiesel blends

How they did it

The authors built hardware comprising a NI DAQ 6009, various sensors, and a laptop running LabVIEW 2015, then programmed virtual instruments for temperature, RPM, fuel consumption, O₂ and NO measurements. Sensors were calibrated with a Fluke 500A calibrator under controlled conditions, and the system was tested on a Mercedes‑Benz 4‑cylinder compression ignition engine operating with diesel‑biodiesel blends, using a custom heat exchanger to maintain sensor‑compatible temperatures.

What they found

Heat‑exchanger reduced exhaust gas temperature by ~60 °C, achieving ~35 °C at the outlet
Sensor calibrations yielded 1.249 V for 100 % N₂ (O₂ sensor) and 0.0014 V for 20.9 % ambient air
NO sensor gave 2.501 V for 100 % O₂ calibration gas
Fuel‑consumption virtual instrument measured up to 1.3 L/h with ±50 mL error per 1.5 L

Caveats

✕Sensors become inaccurate above 50 °C and >95 % relative humidity
✕Fuel‑consumption measurement error margin is ±50 mL per 1.5 L
✕Calibration performed only at 25 °C, 40 % RH, 1 atm

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