Evaluating Piezo-electric Transducer Response to Thermal Shock from In-cylinder Pressure Data

Rosseel, Evert; Sierens, Roger; Baert, Rsg Rik

doi:10.4271/1999-01-0935

Cited by 19 publications

(4 citation statements)

References 5 publications

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“…including topics of thermal shock, chemical compatibility, durability and other important concerns [201][202][203]. The IC engine community has extensively documented methods that thoughtfully consider these issues and others, such as the appropriate placement of pressure transducers, analog-to-digital converter resolution, charge amplifier matching, and triggering.…”

Section: Pressure Measurementsmentioning

confidence: 99%

Advances in rapid compression machine studies of low- and intermediate-temperature autoignition phenomena

Goldsborough

Hochgreb

Vanhove

et al. 2017

Progress in Energy and Combustion Science

206

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Rapid compression machines (RCMs) are widely-used to acquire experimental insights into fuel autoignition and pollutant formation chemistry, especially at conditions relevant to current and future combustion technologies. RCM studies emphasize important experimental regimes, characterized by lowto intermediate-temperatures (600-1200 K) and moderate to high pressures (5-80 bar). At these conditions, which are directly relevant to modern combustion schemes including low temperature combustion (LTC) for internal combustion engines and dry low emissions (DLE) for gas turbine engines, combustion chemistry exhibits complex and experimentally challenging behaviors such as the chemistry attributed to cool flame behavior and the negative temperature coefficient regime. Challenges for studying this regime include that experimental observations can be more sensitive to coupled physicalchemical processes leading to phenomena such as mixed deflagrative/autoignitive combustion. Experimental strategies which leverage the strengths of RCMs have been developed in recent years to make RCMs particularly well suited for elucidating LTC and DLE chemistry, as well as convolved physicalchemical processes. Specifically, this work presents a review of experimental and computational efforts applying RCMs to study autoignition phenomena, and the insights gained through these efforts. A brief history of RCM development is presented towards the steady improvement in design, characterization, instrumentation and data analysis. Novel experimental approaches and measurement techniques, coordinated with computational methods are described which have expanded the utility of RCMs beyond empirical studies of explosion limits to increasingly detailed understanding of autoignition chemistry and the role of physical-chemical interactions. Fundamental insight into the autoignition chemistry of specific fuels is described, demonstrating the extent of knowledge of low-temperature chemistry derived from RCM studies, from simple hydrocarbons to multi-component blends and full-boiling range fuels. Emerging needs and further opportunities are suggested, including investigations of under-explored fuels and the implementation of increasingly higher fidelity diagnostics.

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Section: Pressure Measurementsmentioning

confidence: 99%

Advances in rapid compression machine studies of low- and intermediate-temperature autoignition phenomena

Goldsborough

Hochgreb

Vanhove

et al. 2017

Progress in Energy and Combustion Science

206

View full text Add to dashboard Cite

show abstract

“…Randolph addresses this issue with the development of multiple slot adapters which increase the effective cross section of the connecting passages (thus increasing the cavity resonance and reducing pressure drop) while maintaining individually small passageways which can effectively quench the combustion flame prior to contact with the transducer. Rosseel et al evaluate several transducers and mounting strategies based on both short and long term thermal effects [Rosseel, R. et al, 1999]. Results show transducers which are highly susceptible to thermal error when flush mounted become comparable to high-end thermodynamic transducers with the use of a multi-slot adapter.…”

Section: Thermal Effectsmentioning

confidence: 99%

Multivariate Knock Detection for Development and Production Applications

Tousignant

Reader

Tjong

2004

Transportation: Transportation and Environment

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Combustion knock caused by end gas autoignition continues to be a limiting factor in the performance of automotive internal combustion engines. As such, the availability of efficient knock detection methods is a prime requirement for the optimization of engine mapping and control. Current production knock control systems are based on the measurement of mechanical vibration induced by the acoustic resonance excited in the combustion chamber during autoignition. These vibrations are measured using accelerometers on the engine block. Conversely, knock detection in the laboratory environment during engine development or calibration generally involves either acoustic methods or acquisition of in-cylinder pressure. The purpose of this study is to develop an improved multi-transducer vibration-based knock detection method with applications in engine development and production. The possibility of replacing the pressure-based detection methods in the laboratory environment presents many advantages relating to cost and efficiency. Moreover, the economy of a vibration-based system coupled with improved correlation to laboratory methods represents great potential for performance improvements if applied to production applications.

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“…Sensibilidad térmica, error por choque térmico y deriva térmica: la sensibilidad térmica expresa el efecto de la temperatura del entorno sobre los elementos constructivos del sensor y, por lo tanto, sobre su comportamiento [39]. Esta sensibilidad debe ser muy baja ya que, de lo contrario, se suelen producir dos tipos de deriva indeseable a lo largo de tiempo de medida:…”

Section: Parámetros Para Elección De Sensores De Presiónunclassified

“…A medida que aumenta la longitud de la cavidad, las oscilaciones disminuyen significativamente, sin embargo, se transmiten mayores cargas térmicas provocando sobrecalentamiento y por lo tanto la alteración en la sensibilidad térmica del sensor [39,48]. Dado que la velocidad del sonido depende del cociente de calores específicos, de la constante específica de los gases y principalmente de la temperatura, y aumentando ésta cuando inicia la combustión, se producen oscilaciones en la medida de presión en cámara, debidas justamente a este aumento de temperatura.…”

Section: Rango Optimo De Frecuenciasunclassified

Metodología para la parametrización en tiempo real del proceso de combustión en MCIA.

Andaloussi¹

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ResumenEl trabajo desarrollado en la presente tesis doctoral está encaminado al desarrollo de metodologías para la parametrización en tiempo real del proceso de combustión en motores Diésel 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.El trabajo se ha orientado, por un lado, a definir y poner a punto la herramienta necesaria para la medida y el tratamiento digital de la presión en cámara con el objetivo de aportar mayor fiabilidad y precisión al modelo termodinámico de diagnóstico de la combustión y por otro lado, al desarrollo de nuevas metodologías de diagnóstico de la combustión basadas en el análisis de la derivada de la presión en cámara.De este modo, el trabajo realizado ha llevado a la obtención de procedimientos simples que permiten localizar el ángulo de inicio de la combustión, el ángulo de final de la combustión y el ángulo donde se produce la máxima tasa de liberación de calor únicamente a partir de la señal del sensor de presión en cámara.Además, se ha evaluado el potencial y se ha propuesto ámbitos de aplicación de cada metodología.El trabajo realizado aporta precisión y robustez a la caracterización de la combustión, abriendo la posibilidad de desarrollos futuros de estrategias de control basadas en la optimización, en tiempo real, del proceso de la combustión. Una optimización crucial para la mejora de los motores diésel y la reducción de los contaminantes.

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Evaluating Piezo-electric Transducer Response to Thermal Shock from In-cylinder Pressure Data

Cited by 19 publications

References 5 publications

Advances in rapid compression machine studies of low- and intermediate-temperature autoignition phenomena

Advances in rapid compression machine studies of low- and intermediate-temperature autoignition phenomena

Multivariate Knock Detection for Development and Production Applications

Metodología para la parametrización en tiempo real del proceso de combustión en MCIA.

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