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Integrated controls for commercial dynamometers do not have appropriate characteristics to perform research and teaching tasks. These are developed to perform quick tests and its logic is prepared to obtaining the information in accordance with the technical standards. This way, the use for research is hindered because it does not have an interface that allows a refinement to the desired data ranges, t data sampling and the type of load that is applied. Its use for teaching is limited because these "standard" controls does not allow to analyze or to determine engines characteristics that are not covered through tests specified by the standards, so the use of this tool as an important part in professional training formed by the institution.

The purpose of this project is to develop and test a technological adaptation in an internal combustion engine to increase its efficiency and the reliability of its system of monitoring and measurement of power. Such engines are used as propellants in reciprocating compressors of natural gas (NG) in compression stations installed in the company TBG S/A (owner and operator of the Bolivia Brazil Pipeline). These compression stations receive NG at a pressure of up 58kgf/cm2 and compress natural gas at a pressure of up 75kgf/cm2. Currently the measurement of power expended by the compressors that compress the NG does not happen precisely; this measurement is an important parameter for the operation of the equipment. After studies, it was found that this lack of precision is one of the factors that sometimes cause the operation of compressors off the power range recommended by the engine manufacturer.

The paper addresses the development of an electromagnetic brake control and data acquisition system to capture speed and torque. LabVIEW™ was used to implement a graphical interface to evaluate the performance of internal combustion engines. This graphical interface allows processing and displaying the signs in their appropriate units, and also the refinement of data in the desired tracks, in ways to evaluate the power and torque curves. This project started with the need to improve research equipment control and data acquisition on eddy-current dynamometers that are installed in the ADeMCI research group of the Instituto Federal de Santa Catarina (IFSC). In the control system and data acquisition parameters other variables can be added, such as temperatures, pressures, etc., this will promote further improvement in the precision of torque and power reading with this device.