Virtual Instrument for Emissions Measurement of Internal Combustion Engines.

Armando Pérez,Gisela Montero,Rogelio Ramos,Marcos Coronado,Rubén Pérez,Conrado García

doi:10.1155/2016/9459516

Abstract

The gases emissions measurement systems in internal combustion engines are strict and expensive nowadays. For this reason, a virtual instrument was developed to measure the combustion emissions from an internal combustion diesel engine, running with diesel-biodiesel mixtures. This software is called virtual instrument for emissions measurement (VIEM), and it was developed in the platform of LabVIEW 2010® virtual programming. VIEM works with sensors connected to a signal conditioning system, and a data acquisition system is used as interface for a computer in order to measure and monitor in real time the emissions of O2, NO, CO, SO2, and CO2 gases. This paper shows the results of the VIEM programming, the integrated circuits diagrams used for the signal conditioning of sensors, and the sensors characterization of O2, NO, CO, SO2, and CO2. VIEM is a low-cost instrument and is simple and easy to use. Besides, it is scalable, making it flexible and defined by the user.

Highlights

Air pollution is caused in large part by vehicles due to the burning of fossil fuels that emit pollutant gases such as NO, CO, SO2, and CO2 [1, 2]
We show the programing description of the main blocks that are part of the virtual instrument for emissions measurement that was developed in LabVIEW 2010 platform
The gases are conducted to an exhaust manifold, where the different outputs are connected to the sensors to meter readings in real time, register and storage data provided by the signal conditioners devices and processed through the virtual instrument in the PC

Summary

Introduction

Air pollution is caused in large part by vehicles due to the burning of fossil fuels that emit pollutant gases such as NO, CO, SO2, and CO2 [1, 2]. Integrated circuits are used for conditioning and amplifying the signal that the sensors send when the amount information or gas concentration is registered. Registered voltage Vo is of 2.435 V when showing 1% of oxygen; this is the minimum concentration that sensor can detect It means that data acquisition device (DAQ) processes increments that are equivalent to 0.065 V/1% of O2. Registered voltage Vo is of 2.5039 V when showing 1 ppm of CO; this is the minimum concentration that sensor can detect It means that the DAQ processes increments that are equivalent to 0.00392 V/1 ppm of CO.

Software Programming for Virtual Instrumentation Development

Applications

Findings

Conclusions