Air mass flow estimation in turbocharged diesel engines from in-cylinder pressure measurement

Desantes, J.M.; Galindo, José; Guardiola, Carlos; Dolz, V.

doi:10.1016/j.expthermflusci.2009.08.009

Cited by 112 publications

(68 citation statements)

References 32 publications

(43 reference statements)

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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

151

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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

151

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“…The synthesis mechanism of neat COPUs using the pre-polymer technique shown in Figure 2 comprises two main steps; first, the dehydrated castor oil (15%) is mixed with the already dehydrated PPG, and second, a polyol mixture of PPG + 15% castor oil is reacted with diisocyanate, which was vacuum degassed for 5 minutes with high speed stirring for 25 minute at 75 ºC prior to mixing to achieve a homogeneous mixture and generate a castor-oil-based pre-polymer with final isocyanate groups, followed by reaction with a chain extender [14] in the presence of a catalyst at high speed stirring for 1 minute at 75 ºC to produce viscous COPUs (in this case, saturated and crystallized).…”

Section: Synthesis Mechanism Of Castor-oil-based Pusmentioning

confidence: 99%

“…First, PPG is reacted with diisocyanate, then vacuum de-gassed for 5 minutes with high speed stirring for 25 minutes at 75 ºC to achieve a homogeneous mixture and generate a pre-polymer with final isocyanate groups (in this case, polyunsaturated and amorphous). Second, the pre-polymer is reacted with a chain extender [14] in the presence of a DACO catalyst at high speed stirring for 1 minute at 75 ºC to produce viscous PU (in this case, saturated and crystallized). …”

Section: Synthesis Mechanism Of Pure Pusmentioning

confidence: 99%

Pure Polyurethane and Castor Oil Based Polyurethane: Synthesis and Characterization

Alaa¹,

Yusoh²,

Hasany³

2015

J. Mech. Eng. Sci.

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In this study, the physico-chemical properties of high performance polyurethane synthesized from poly propylene glycol (PPG) in comparison with a combination of PPG and castor oil, is studied using the in-situ polymerization technique. The variations in properties of both types of polyurethanes are evaluated by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD) and the thermogravimetric analysis (TGA) technique. Tensile strength properties were investigated by film tensile testing equipment. The results indicated the presence of large -CH stretching in the castor oil mixed polyurethane with a larger oxidative thermal stability over pure PPG polyurethanes. The tensile properties were found to be almost comparable in pure and mixed polymers, signifying the usage of mixed polymers in the future to overcome the environmental and economic crisis in polyurethane synthesis.

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“…The engine control was performed by means of an externally calibrable ECU in a way that boost pressure, exhaust gas recirculation rate and injection characteristics could be modified during the tests. Additional details on the engine characteristics and acquisition system can be found in [11][12][13].…”

Section: Methodsmentioning

confidence: 99%

Identifying static and dynamic prediction models for NOx emissions with evolving fuzzy systems

Lughofer

Macián

Guardiola

et al. 2011

Applied Soft Computing

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ElsevierLughofer, E.; Macian Martinez, V.; Guardiola García, C.; Klement, EP. (2011) AbstractAntipollution legislation in automotive internal combustion engines requires active control of pollutant formation and emissions. In addition to new technologies, like selective catalyst systems or diesel particulate filters, predictive emission models are needed. These models are of great use in the system calibration phase, and also can be integrated for the engine control and on-board diagnosis tasks. In this paper, fuzzy modelling of the NOx emissions of a diesel engine is investigated, which overcomes some drawbacks of pure engine mapping or analytical physical-oriented models. For building up the fuzzy NOx prediction models, the FLEXFIS approach (short for FLEXible Fuzzy Inference Systems) is applied, which automatically extracts an appropriate number of rules and fuzzy sets by an evolving version of vector quantization (eVQ) and estimates the consequent parameters of Takagi-Sugeno fuzzy systems with the local learning approach in order to optimize the least squares functional. The predictive power of the fuzzy NOx prediction models is compared with that one achieved by physical-oriented models based on high-dimensional engine data recorded during steady-state and dynamic engine states.

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Air mass flow estimation in turbocharged diesel engines from in-cylinder pressure measurement

Cited by 112 publications

References 32 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

Pure Polyurethane and Castor Oil Based Polyurethane: Synthesis and Characterization

Identifying static and dynamic prediction models for NOx emissions with evolving fuzzy systems

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