Detection of cylinder misfire in an aircraft engine using linear and non-linear signal analysis

Syta, Arkadiusz; Czarnigowski, Jacek; Jakliński, P.

doi:10.1016/j.measurement.2021.108982

Cited by 19 publications

(8 citation statements)

References 46 publications

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“…Both for supercharged and undercharged engine the values of temprature in this point are in accordance with literature data. [44,45]. They are also consistent with the engine manufacturer's published data for acceptable engine exhaust gas temperatures at this point.…”

Section: Resultssupporting

confidence: 88%

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Bench Tests for Exhaust Gas Temperature Distribution in an Aircraft Piston Engine with and without a Turbocharger

Czarnigowski¹,

Skiba²,

Rękas³

et al. 2021

Adv. Sci. Technol. Res. J.

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In ultralight aviation, a very important engine parameter is the power-to-weight ratio. On the one hand, there is a tendency to minimize the size and weight of engines, and on the other hand, there is a demand to achieve the highest possible power by using supercharging systems. Increasing power brings many benefits, but it also increases temperature in the exhaust system, posing a threat to delicate parts of the ultralight aircraft fuselage. Therefore, it is necessary to control temperature values in the engine exhaust system. This article presents the temperature distribution in the exhaust system of an aircraft engine by the example of a four-cylinder Rotax 912 engine with an electronic fuel injection system. The research was conducted in two stages: measurements were made first for the engine without a turbocharger with an original exhaust system and later for its modified version with an added turbocharger system. The paper presents a comparative analysis of exhaust gas temperatures measured at three points: 30, 180 and 1000 mm from the cylinder head. The tests were conducted for the same preset engine operating conditions at constant speed and manifold air pressure. It has been shown that the exhaust temperature in the exhaust manifold decreases with the distance from the cylinder head. The highest gradient, over three times higher than the gas temperature from 589.9 °C to 192.3 °C, occurred in the manifold with a turbocharger for 2603 RPM and 31 kPa of manifold air pressure. The introduction of turbocharging causes an increase in exhaust gas temperatures before the turbocharger by an average of 12%, with this increase being greater for operating points of higher inlet manifold pressure. Turbocharging also causes a significant decrease in exhaust gas temperatures behind the turbocharger and the silencer because the temperature drops there by an average of 25%.

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Section: Resultssupporting

confidence: 88%

“…Knowledge of exhaust gas temperature can also provide information on the operating condition of the engine [43]. A number of studies have been carried out to compare different measuring methods for analyzing temperature of exhaust gases and exhaust system components [44,45]. The results are highly scattered.…”

Section: Introductionmentioning

confidence: 99%

Bench Tests for Exhaust Gas Temperature Distribution in an Aircraft Piston Engine with and without a Turbocharger

Czarnigowski¹,

Skiba²,

Rękas³

et al. 2021

Adv. Sci. Technol. Res. J.

Self Cite

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“…Before a new aircraft is introduced to the market, a number of simulation and bench tests are required. Numerical analyses require advanced computational models to illustrate the operation of selected subsystems [2][3], while the bench tests require the construction of test rigs enabling stationary testing of conceptual solutions before their application in flight [4][5]. The preparation of the test bench is an extensive process requiring design of the new components and development of metering to achieve conditions as close as possible to real ones.…”

Section: Introductionmentioning

confidence: 99%

Durability Analysis of the Prototype Test Rig for Main Rotors

Ścisłowski¹,

Skiba²,

Wendeker³

et al. 2022

Komunikácie

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ResumeThis paper presents an analysis of the strength of a prototype test rig for testing rotors of unmanned aerial vehicles. Digital design software was used for the design work that covered the creation of a virtual model of the test rig and strength analysis of its key elements. The paper discusses the test rig solutions, applied to date, of the small main rotor research. From the assumed operational parameters and structural parameters of the rotor, the main forces acting on the designed structure were determined: lifting force, reaction torque and empty mass of the test rig. Suitable actuators of the control system enabling the regulation of the total pitch and periodic pitch of the rotor, within the full range of the angle of attack, were selected for the rotor under test. The FEM (Finite Element Method) strength analysis was carried out for the proposed support structure and the correctness of the design was verified.

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“…recurrence plots (RPs) and recurrence quantification analysis (RQA). The proposed method is applied to the analysis of short-time series and has been successfully used in the diagnostics of mechanical systems [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effect of Radial Clearance on Ball Bearing’s Dynamics Using a 2-DOF Model

Ambrożkiewicz¹,

Litak²,

Georgiadis³

et al. 2021

Int. j. simul. model.

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In the present work, a method for the analysis of short time intervals in ball bearings is proposed. We study the effect of the internal clearance on the dynamics of ball bearings using recurrence plots and the recurrence quantification approach. In the proposed method, we focused on the analysis of dynamic states generated from the 2-DOF mathematical model, to which a function changing the damping coefficient in the clearance domain was added. Chosen recurrence methods showed the specific dynamic responses by different values of the radial clearance. The effect of self-consistency concerning the damping effect and vibration development is confirmed. The proposed method can be useful for the prediction of variable radial clearance in time by analysis of the acceleration response of ball bearing during its operation.

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Detection of cylinder misfire in an aircraft engine using linear and non-linear signal analysis

Cited by 19 publications

References 46 publications

Bench Tests for Exhaust Gas Temperature Distribution in an Aircraft Piston Engine with and without a Turbocharger

Bench Tests for Exhaust Gas Temperature Distribution in an Aircraft Piston Engine with and without a Turbocharger

Durability Analysis of the Prototype Test Rig for Main Rotors

Effect of Radial Clearance on Ball Bearing’s Dynamics Using a 2-DOF Model

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