A new engine indicating measurement procedure for combustion heat release analysis

Bueno, André Valente; Velásquez, José Antonio; Milanez, Luiz Fernando

doi:10.1016/j.applthermaleng.2008.07.023

Cited by 35 publications

(19 citation statements)

References 27 publications

(44 reference statements)

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“…The measurements were taken at intervals of 200 rpm and fractions of 12.5% of the maximum braking torque on each rotation, ensuring that the engine is operated steady. More information about the experimental procedures adopted can be found in (BUENO et al, 2009b). …”

Section: Engines and Countertops Dynamomenticmentioning

confidence: 99%

Performance impact of the application of castor oil biodiesel in diesel engines

et al. 2013

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ABSTRACT:The use of renewable fuels, such as the biodiesel, can ease the demand of fossil fuel for the power generation and transportation fields in rural area. In this work, the performance impact of the application of castor oil biodiesel is evaluated with an automotive and a stationary diesel engine. The application of B20 and B10 biodiesel blends and pre-heated net biodiesel is considered. The viability of the employment of B10 and B20 blends to mobility and power generation was observed from dynamometric bench tests, where this blends performed similar to fossil diesel. With the pre-heated net biodiesel, however, a brake torque loss and a specific consumption increase were observed with relation to diesel fuel. KEYWORDS:Biodiesel, Castor Oil, Diesel Engine, Dynamometric Bench Tests. IMPACTO DA UTILIZAÇÃO DO BIODIESEL DO ÓLEO DE MAMONA NO DESEMPENHO DE MOTORES DIESELRESUMO: A utilização de fontes renováveis de energia, como o biodiesel, pode coibir o uso dos combustíveis fósseis empregados na geração de potência e no transporte rural. Neste trabalho, avaliou-se o impacto operacional da aplicação do biodiesel de mamona em um motor diesel automotivo e em um motor diesel estacionário de médio porte, estudando-se as alterações provenientes da utilização deste biocombustível puro preaquecido e, como misturas, B10 e B20. Observou-se em bancada a viabilidade de aplicação das misturas B10 e B20, tanto em mobilidade quanto em geração de trabalho elétrico, pois as mesmas obtiveram desempenho similar ou superior ao do diesel mineral. Contudo, resultados inferiores de torque de frenagem e um aumento no consumo específico foram obtidos com o biodiesel de mamona preaquecido B100 com relação ao óleo diesel. PALAVRAS-CHAVE:Biodiesel, Óleo de Mamona, Motor Diesel, Ensaio Dinamométrico.

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Section: Engines and Countertops Dynamomenticmentioning

confidence: 99%

Performance impact of the application of castor oil biodiesel in diesel engines

et al. 2013

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“…Therefore, this technique also eliminates the need for resetting the transducer polarization circuit due to the large displacements of the data baseline. Further details involving the conditioning of the pressure derivative signal using a current-tovoltage converter can be found in references Bueno et al (2009) and Bueno et al (2011).…”

Section: Signal Processing With a Current-to-voltage Convertermentioning

confidence: 99%

“…However, the choice of a proper data treatment methodology requires, at least, a basic knowledge about the behaviour of each one of the above mentioned components of the experimental data. In order to assess this behaviour Bueno et al (2009) proposed to estimate the smooth component corresponding to the average pressure through the entire cylinder volume and, then, to employ it to analyze the spurious component of the experimental data. Sections 4.1 through 4.3 show how this task is accomplished.…”

Section: Uncertainty Sources and Data Treatmentmentioning

confidence: 99%

“…Such procedure would result, however, in the formation of an RC circuit between the transducer inherent capacitance and the measurement resistance, which, in turn, would cause attenuation in the voltage drop and a phase delay with respect to the polarized current. In order to avoid this problem Bueno et al (2009Bueno et al ( , 2010Bueno et al ( , 2011 proposed to use a circuit that converts current into voltage (Franco, 2001), consisting of an operational amplifier and a negative feedback resistor, as shown in Figure 6. This circuit operates stably in a range of gains typical for engine indicating measurements, and may undergo minor changes related to balancing techniques, depending of which operational amplifier was chosen for its construction.…”

Section: Signal Processing With a Current-to-voltage Convertermentioning

confidence: 99%

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Internal Combustion Engine Indicating Measurements

Bueno¹,

Velásquez²,

Milanez³

2012

Applied Measurement Systems

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“…The vibration signals from the cylinder head are normally non-stationary signals and they are generally analysed with time domain and frequency domain analysis [7]. The combustion process inside the engine cylinder can be studied by means of a direct measurement with a combustion pressure transducer which is expensive, unreliable, and difficult for installation in the hostile engine environment [8][9][10][11] Hence, non-intrusive measuring techniques are put into practice to study the combustion process inside the engine cylinder as they retain the advantage of being less expensive; durable and reliable; and easy to use [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation of vibration characteristics of compression ignition engine running with neem methyl ester

Varma¹,

Kumar²,

Prasanthi³

2022

Int. J. Automot. Mech. Eng.

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Reduction of fossil fuel reserves, environmental deterioration, global warming, and rigorous emission norms have necessitated the need for alternate fuel such as biodiesels. Diesel engines produce a higher vibration which leads to a reduced engine life span. In the present study, the vibration of a compression ignition engine has been measured for both diesel and Neem methyl ester. The experiments were carried out at 0%, 25%, 50%, 75%, and 100% load when the engine runs at a constant speed of 1500 rpm and with a compression ratio of 16. Triaxial accelerometer is used for measuring engine vibration along vertical, lateral, and longitudinal directions. Data acquisition and analysis are obtained by NI LabVIEW. It has been observed that an engine running with NME produces lower combustion induced vibration acceleration compared to diesel fuel. It is also noticed that higher peak amplitudes are observed at the frequency of 25 Hz for both diesel and NME, within the range of 0-100 Hz and along three directions. Within the range of 100-3000 Hz, the highest peak amplitudes are observed for engine running with diesel compared to neem methyl ester. At a 100% load, the change in vibration amplitude is 64.94 %, 86.41%, and 17% along vertical, lateral, and longitudinal directions when fuel is changed from NME to diesel. Combustion characteristics such as maximum cylinder pressure, heat release rate, and rate of pressure rise are also measured for both diesel and NME in order to find the relationship between combustion and vibration. At full load conditions, the maximum combustion pressure and maximum rate of pressure rise are increased by 2.1% and 8.33% with pure diesel compared to neem methyl ester. The experimental work suggests that neem methyl ester can be directly used in diesel engines in view of a lesser engine vibration and higher engine life.

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A new engine indicating measurement procedure for combustion heat release analysis

Cited by 35 publications

References 27 publications

Performance impact of the application of castor oil biodiesel in diesel engines

Performance impact of the application of castor oil biodiesel in diesel engines

Internal Combustion Engine Indicating Measurements

An experimental investigation of vibration characteristics of compression ignition engine running with neem methyl ester

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