The Use of a Low Frequency Vibration Signal in Detecting the Misfire of a Cylinder of an Aircraft Piston Engine

Czarnigowski, Jacek; Jakliński, P.; Ścisłowski, Karol; Rękas, Daniel

doi:10.4271/2020-01-2023

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…Alcohol fuels such as ethyl alcohol, which is produced by fermenting plant biomass, are an important type of fuel produced from plant components [31]. Many publications refer to the use of alcohol fuels in internal combustion engines and their impact on the operating parameters of such engines such as vibration and the way they are measured [6,27], noise intensity [13], energy efficiency [2] or reduction in the number of harmful exhaust components [15,23]. Ongoing research has shown that the use of alcohol addi-tives and alcohol as a stand-alone fuel both in sparkignition engines [16,25] and diesel engines [17,30] can significantly affect the engine performance.…”

Section: Introductionmentioning

confidence: 99%

Study of the effect of ignition crank angle and mixture composition on the performance of a spark-ignition engine fueled with ethanol

Jakliński,

Czarnigowski,

Ścisłowski

2024

Combustion Engines

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The publication presents the results of the measurements of the operating parameters of a spark-ignition engine fueled with 95-octane unleaded gasoline (ES95) and ethyl alcohol, approx. 92%. The measurements were carried out at a constant load: an engine speed of 1,500 rpm and a constant pressure in the intake system - MAP=0.45 bar. For each type of fuel, the measurements were carried out in two series for two variables. The ignition crank anglewas varied in the range of 0˚÷40˚ and the mixture composition λ in the range of 0.85÷1.25. The recorded engine performance parameters included torque, intake manifold pressure, intake air temperature, exhaust gas temperature and temporal fuel consumption; and exhaust gas composition was examined in terms of carbon monoxide, hydrocarbons and nitrogen oxides. The study showed that an ethanol-fueled engine has lower average efficiency compared to a gasoline one. The highest efficiency for ethanol was obtained for rich mixtures in the range λ=0.85÷1.0 and at high ignition advance angles. The use of alcohol fuel showed a very favorable effect on the composition of exhaust gas and a significantly lower content of harmful exhaust components was demonstrated. For the same operating points, carbon monoxide content was reduced by an average of 15%, and hydrocarbons and nitrogen oxides by an average of 80%.

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Section: Introductionmentioning

confidence: 99%

Study of the effect of ignition crank angle and mixture composition on the performance of a spark-ignition engine fueled with ethanol

Jakliński,

Czarnigowski,

Ścisłowski

2024

Combustion Engines

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“…Despite the fact that the intensity may be quite low, all moving machinery vibrates [6]. Engine vibration can be caused by imbalanced rotary or torque forces, which don't have a set value, as well as fluctuations in the piston's gas pressure [9][10] [11], and 149 variations in the bending moment or inertial force with each movement of the object. By modifying the effect on the frequency and amplitude, vibration can be lessened.…”

Section: Introductionmentioning

confidence: 99%

Identification of misfiring in engine 1000cc using fast fourier transform analysis

Yorda Agustin,

Subekti Subekti,

Dayu Andryas Saputra

2023

jttm

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Motorized vehicles are the primary mode of transportation in the neighborhood. An automobile is one of the motorized vehicles. Because of the mixing of air and gasoline, cars may move. The spark plug plays a crucial function in combustion because it ignites the mixture of fuel and air to generate combustion. Incomplete combustion will consequently result in misfiring. Damage to the spark plug, injector, and ignition coil are just a few of the things that might lead to misfiring. Therefore, due to misfiring, research on preventive maintenance for cars is required. Utilizing the vibration approach is one option. The combustion process in this study is stimulated by changing the 1000cc engine's speed. The engine speed ranges from 900 to 3500 revolutions per minute. The accelerometer sensor is then positioned vertically and horizontally on the machine's surface. According to this study, the first form mode's frequency at 900 rpm has an amplitude of 3,433 mm/s2 and occurs at a frequency of 69 Hz. In contrast, the first mode form occurs under typical circumstances at a frequency of 99 Hz and an amplitude of 1,254 mm/s2. Furthermore, at a rotational speed of 2500 rpm, the frequency in the first shape mode is abnormal at 69 Hz with an amplitude of . In contrast, under typical circumstances, the first form mode has a frequency of 249 Hz and an amplitude of 6,721 mm/s2. A frequency of 4x rpm was discovered for the rotational speed parameters of 900 rpm and 2500 rpm. This demonstrates that a misfiring-related bearing issue exists in the piston motor system.

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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

Self Cite

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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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The Use of a Low Frequency Vibration Signal in Detecting the Misfire of a Cylinder of an Aircraft Piston Engine

Cited by 6 publications

References 34 publications

Study of the effect of ignition crank angle and mixture composition on the performance of a spark-ignition engine fueled with ethanol

Study of the effect of ignition crank angle and mixture composition on the performance of a spark-ignition engine fueled with ethanol

Identification of misfiring in engine 1000cc using fast fourier transform analysis

Durability Analysis of the Prototype Test Rig for Main Rotors

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