Digital signal processing of in-cylinder pressure for combustion diagnosis of internal combustion engines

Payri, F.; Luján, José Manuel; Martín, Javier Rodríguez; Abbad, Ali

doi:10.1016/j.ymssp.2009.12.011

Cited by 94 publications

(74 citation statements)

References 38 publications

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“…The in-cylinder pressure signal can provide vital information such as peak pressure, P-V diagram, indicated mean effective pressure, fuel supply effective pressure, heat release rate, combustion duration, ignition delay and so on [53], [54]. Moreover, based on ideal gas and first law of thermodynamics it can be used in more complex calculations for example in air mass flow estimation, combustion diagnosis and NOx prediction [53], [55].…”

Section: Effects Of Biodiesel Types and Blends Fraction On Combustionmentioning

confidence: 99%

Combustion and performance characteristics of CI (compression ignition) engine running with biodiesel

Tesfa

Mishra

Zhang

et al. 2013

Energy

150

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Biodiesel is one of the alternative fuels which is renewable and environmentally friendly and can be used in diesel engines with little or no modifications. In the present study, experimental investigations were carried out on the effects of biodiesel types, biodiesel fraction and physical properties on the combustion and performance characteristics of a compression ignition (CI) engine. The experimental work was conducted on a four-cylinder, four -stroke, direct injection (DI) and turbocharged diesel engine by using biodiesel of waste oil, rapeseed oil and corn oil and normal diesel. Based on the measured parameters, detailed analyses were carried out on cylinder pressure, heat release rate and brake specific fuel consumption (BSFC). It has been seen that the biodiesel types do not result in any significant differences in peak cylinder pressure and BSFC. The results also clearly indicate that the engine running with biodiesel have slightly higher in-cylinder pressure and heat release rate than the engine running with normal diesel. The BSFC for the engine running with neat biodiesel was higher than the engine running with normal diesel by up to 15%. It is also noticed that the physical properties of the biodiesel affects significantly the performance of the engine.

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Section: Effects Of Biodiesel Types and Blends Fraction On Combustionmentioning

confidence: 99%

Combustion and performance characteristics of CI (compression ignition) engine running with biodiesel

Tesfa

Mishra

Zhang

et al. 2013

Energy

150

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“…A crank angle increment of 0.5° was used for the in-cylinder pressure acquisition [23], which was performed using DRIVVEN [24]. 25 consecutive cycles were measured.…”

Section: Multi-cylinder Light Duty Diesel Enginementioning

confidence: 99%

In-cylinder soot radiation heat transfer in direct-injection diesel engines

Benajes

Martín

García

et al. 2015

Energy Conversion and Management

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HIGHLIGHTSOptoelectronic pyrometer provides similar results compared with a conventional method Lower injection pressure results in higher radiation Higher ambient temperature and higher in-cylinder gas density produce higher radiation Larger lift-off length reduces the soot volume fraction and the spectral intensity An increase on swirl number, load and CA50 provide a lower total radiation Lower values of EGR implies a decreased on radiation intensity KEYWORDSSoot; in-cylinder heat transfer; radiation; Optical pyrometer; ABSTRACTThe efficiency and CO 2 are one of the main concerns of automotive manufacturers.There are several strategies under investigation to solve this problem. In the present work, the research effort has been focused on improving knowledge of in-cylinder heat transfer and its impact on engine efficiency. In particular, soot radiation was studied since it can be considered a significant source of the efficiency losses in modern diesel engines. Considering previous studies, the portion of total chemical energy released during combustion lost due to radiation heat transfer varies widely from 0.5 up to 10%, depending on engine parameters and combustion process. Thus, the main objective of this work was to evaluate the amount of energy lost to soot radiation relative to the input fuel chemical energy during the combustion event under different operating conditions in a completely controlled environment provided by an optical engine. Under these simplified conditions, two-color method was applied by using high speed imaging pyrometer with cameras (two dimensional results) and optoelectronic pyrometer (zero dimensional results). Once a detailed comparison between both diagnostics was performed, optoelectronic pyrometer was used to characterize radiant energy losses in a fully instrumented 4-cylinder direct-injection light-duty diesel engine. In particular swirl ratio, EGR and combustion phasing effects on radiation heat transfer were evaluated.

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“…The NOx emission of CI engines is largely a thermal phenomenon and thus in-cylinder pressure and air flow rate can be used to make an accurate online quantitative prediction of NOx emission in real-time. The in-cylinder pressure has been chosen for this purpose due to its well established relationship with in-cylinder temperature, either ideal gas law or thermodynamic equations [11].…”

Section: Introductionmentioning

confidence: 99%

NOx Emission prediction based on measurement of in-cylinder pressure for CI engine running with diesel and biodiesel

Tesfa¹,

Mishra²,

Gu³

et al. 2014

IJAET

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NOx is one of the major toxic emissions that needs to be regulated stringently in both EU and USA emission regulations. The engine designer is keen to get an accurate, reliable and cost effective NOx measurement system. In this paper, the application of the cylinder pressure for predicting the NOx emission of compression ignition (CI) engine fuelled with diesel and biodiesel during steady state operations is carried out. To address the problem, an experimental work was conducted on four-cylinder, turbo-charged, four-stroke and directinjection CI engine which was fuelled with diesel and biodiesel blends. During the experiment, the main parameters consisting of in-cylinder pressure, fuel flow rate, air flow rate, and the NOx emission, were measured. The temperature within the cylinder was predicted using the cylinder pressure and air flow rate. Using the temperature values, the NOx emission was simulated in the Zeldovich extended mechanism. The simulation result was then compared with the measured one for a range of engine operating conditions. The models were shown to produce consistent results with the measured one for a range of engine working speeds and loads.

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Digital signal processing of in-cylinder pressure for combustion diagnosis of internal combustion engines

Cited by 94 publications

References 38 publications

Combustion and performance characteristics of CI (compression ignition) engine running with biodiesel

Combustion and performance characteristics of CI (compression ignition) engine running with biodiesel

In-cylinder soot radiation heat transfer in direct-injection diesel engines

NOx Emission prediction based on measurement of in-cylinder pressure for CI engine running with diesel and biodiesel

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