Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
COMPENSATION OF THE ENGINE INDICATING PRESSURE SIGNAL DISTORTION PRODUCED BY A FIBER-OPTIC SENSOR
Submission Author:
José Velásquez , PR
Co-Authors:
Dinarte Santos, irionson bassani, José Velásquez
Presenter: Dinarte Santos
doi://10.26678/ABCM.COBEM2017.COB17-2376
Abstract
This article describes the development of a procedure that allows compensating the signal distortion of the in-cylinder pressure, as measured with a fiber-optic pressure sensor. The corrective procedure is based on a comparison of experimental pressure data with the corresponding simulated results given by a thermodynamic model, which allows calculating the working cycle of a spark ignition engine, including the compression, combustion-expansion, as well as the exhaust and intake processes. This computational model takes into account the finite duration of the combustion process, the heat transfer between the working fluid and cylinder walls, and the mass flow through the intake and exhaust valves. Additionally, the correlation proposed by Wiebe was used to represent the combustion heat release. The model was initially applied for simulating the motored operation of a single-cylinder, variable compression-ratio CFR engine. Afterwards, results of this simulation as well as experimental data were used to calculate the parameters of a second order high-pass filter model, which was used to represent the behavior of the fiber-optic pressure sensor. Corrected in-cylinder pressure data measured on the CFR engine during its fired operation were, then, employed in order to validate the data treatment procedure.
Keywords
Compensation of measurement signal distortion, Fiber-optic pressure sensor, Engine indicating measurements, Two zone combustion model, Variable compression ratio CFR engine
