Problems with Heat Release Analysis in D.I. Diesels

Timoney, David J.

doi:10.4271/870270

Cited by 17 publications

(11 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A number of researchers have previously carried out an analysis of the apparent heat release model for errors in the gross heat released (in joules) due to constant gamma, heat transfer and pressure data errors [6,7,[29][30][31][32]. However, the pressure data used was typical of the conventional high temperature combustion regime for both low-load and high-load diesel operation.…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 98%

Fast heat release characterization of a diesel engine

Asad

Zheng

2008

International Journal of Thermal Sciences

View full text Add to dashboard Cite

Section: Experimental Apparatus and Proceduresmentioning

confidence: 98%

Fast heat release characterization of a diesel engine

Asad

Zheng

2008

International Journal of Thermal Sciences

View full text Add to dashboard Cite

“…When the pressure and mass at IVC are determined, the temperature is calculated by means of a state equation. Normally the perfect gas assumption is used; 1,11,32,33 however, more complex proposals can be found in literature. 34 If the temperature is calculated following the above procedure, the heat release will be affected by the uncertainty in the mass at IVC, in different ways.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the in-cylinder residual mass fraction at intake valve closing in a two-stroke high-speed direct-injection compression-ignition engine

Torregrosa

Martín

Novella

et al. 2018

International Journal of Engine Research

View full text Add to dashboard Cite

New combustion concepts and engine designs are being currently investigated in order to comply with upcoming pollutant regulations and reduce fuel consumption. In this context, two-stroke architectures appear as a promising solution for the implementation of some combustion concepts. However, scavenging processes in a two-stroke engine are much more challenging than for a four-stroke engine, and the residual mass of burnt gases retained inside the cylinder needs to be properly determined in order to keep control over the in-cylinder composition, hence over the combustion conditions and pollutant emissions. In this study, a new methodology for the estimation of the internal residual gas fraction is introduced, which is based on the thermodynamic processes occurring in the engine investigated and makes use of basic engine instrumentation and measurement equipment usually available in a conventional test cell. Several versions of the estimator were developed so that different requirements could be met, such as those of real-time estimation on an engine test bench but with reduced precision or, on the contrary, highly precise but time-consuming computations for post-processing purposes and combustion diagnosis. The consistency of the internal residual gas estimator was then validated through its application to real engine tests at different operating points.

show abstract

“…Su medida experimental puede hacerse cubicando el volumen de la cámara de combustión con el pistón en el PMS, pero no es un procedimiento fácil ni exento de incertidumbre. Es un parámetro difícil de estimar con precisión y su ajuste suele estar basado en la presión medida en ensayos sin combustión, mediante el empleo de una evolución politrópica como hace Klein y otros [38]. Armas propone un método termodinámico de ajuste basado en la influencia de r c sobre el exponente politrópico [39] en ensayos con el motor arrastrado.…”

Section: Relación De Compresiónunclassified

“…Una vez conocidas la presión y la masa, el cálculo de la temperatura es inmediato mediante el empleo de una ecuación de estado. Habitualmente la de los gases perfectos [20,[36][37][38], aunque algunos autores utilizan otras más complejas [39].…”

Section: Estimación De La Masa Atrapadaunclassified

“…Aunque en ese estudio se ha mostrado que una gran variación en la transmisión de calor no afecta de forma importante a la liberación de calor, su efecto no es despreciable. De hecho, hay autores [38] que atribuyen al error en la transmisión de calor la diferencia entre la liberación de calor total acumulada y la energía del combustible inyectado, o que ajustan el modelo de transmisión de calor para que estas coincidan [24,49]. Además, aparte de ser necesaria para el balance energético, existen otras razones importantes para abordar su mejora:…”

Section: Aportaciones a La Transmisión De Calorunclassified

See 1 more Smart Citation

Aportación al diagnóstico de la combustión en motores Diesel de inyección directa

Díaz¹

View full text Add to dashboard Cite

El trabajo desarrollado en la presente tesis doctoral está encaminado a profundizar en el diagnóstico de la combustión a partir de la señal de presión en el cilindro en los motores Diesel de inyección directa. Para ello, se dispone del conocimiento previo sobre adquisición de señal de presión y diagnóstico de la combustión mediante el modelado termodinámico existente en el grupo de trabajo en que se ha desarrollado....miraba estupefacta los agujeros negros en la carcasa del motor yéste seguía funcionando como si tal cosa, a toda madre y ni un rastro de humo siquiera...

show abstract

Problems with Heat Release Analysis in D.I. Diesels

Cited by 17 publications

References 18 publications

Fast heat release characterization of a diesel engine

Fast heat release characterization of a diesel engine

Estimation of the in-cylinder residual mass fraction at intake valve closing in a two-stroke high-speed direct-injection compression-ignition engine

Aportación al diagnóstico de la combustión en motores Diesel de inyección directa

Contact Info

Product

Resources

About