Estimation of the Engine Thermal State by in-Cylinder Pressure Measurement in Automotive Diesel Engines

Arsie, Ivan; Leo, R. Di; Falco, Stefano; Pianese, Cesare; Cesare, Matteo De

doi:10.4271/2015-01-1623

Cited by 14 publications

(8 citation statements)

References 9 publications

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“…Even though all the correlations lacked perfect accuracy, suggested equation (1) showed the best fit to the experimental data. Better representation of the gas flow and its effect on the heat flux from the engine head can be visualized when compared to the conventional correlations (10) and (11). As indicated before the swirl motion effect was included in all correlations, which became somewhat easy to observe before TDC, between 340-360 CA.…”

Section: Heat Fluxmentioning

confidence: 95%

“…Morel offered another approach based on Colburn analogy with an effective velocity representation which took into account of the kinetic energy of squish, intake flow and injection, and swirl gradients at region interfaces [4]. The heat transfer coefficient was formulated as the following equation: (10) and (11) were focused on having a better gas flow representation. However, both of them lacked the adequacy levels in an actual engine's working conditions.…”

Section: Previous Convective Heat Transfer Correlationsmentioning

confidence: 99%

“…As previously indicated two conventional empirical equations (10) and (11), and newly suggested heat flux equation 1were implemented into the 1-D engine simulation software and simulations results were compared to the experimental data. Naturally aspirated direct injection diesel engine where engine speed was fixed at 1500 rpm.…”

Section: Heat Fluxmentioning

confidence: 99%

“…Figure 4 illustrates the heat flux comparison from piston area. In Hohenberg's equation (10), gas flow was concentrated on mean piston speed along with change in chamber volume and its accuracy to the experimental results was found to be the best at the piston when compared to other sections of the engine cylinder (head or liner). However, its degree of competence was lower when compared to other equations.…”

Section: Heat Fluxmentioning

confidence: 99%

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Validation of In-cylinder Heat Flux Estimation Model by Measuring Wall Temperature

Yilmaz

Chen

Matsui

et al. 2019

IJAE

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A new equation, which was dependent on physical principles, was developed for the study of heat transfer in CI engines which needs turbulence of gas flows to calculate heat flux. Proposed approach was implemented into a 1-D engine simulation, which was used to determine heat flux between in-cylinder gas and wall. Results from the suggested equation were compared to the previous conventional equations; Morel and Hohenberg, and to the engine experiments. The proposed equation showed better accuracy when compared with the conventional equations due to detailed representation of in-cylinder gas flow by dividing the combustion chamber into 6 different regions.

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Section: Heat Fluxmentioning

confidence: 95%

Section: Previous Convective Heat Transfer Correlationsmentioning

confidence: 99%

Section: Heat Fluxmentioning

confidence: 99%

Section: Heat Fluxmentioning

confidence: 99%

See 2 more Smart Citations

Validation of In-cylinder Heat Flux Estimation Model by Measuring Wall Temperature

Yilmaz

Chen

Matsui

et al. 2019

IJAE

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“…The cylinder pressure variable has found its use in a large variety of applications like misfire detection, 12 exhaust manifold pressure estimation, 13 exhaust gas recirculation control and estimation, 14,15 emission control 16,17 and cylinder wall temperature estimation. 18,19 The cylinder pressure sensor is also used to determine the mass and composition of trapped charge. An accurate estimation of trapped charge is particularly needed for the control of engine combustion and after-treatment systems.…”

Section: Introductionmentioning

confidence: 99%

Trapped mass estimation in automotive diesel engines based on in‐cylinder pressure signal projection

Youssef

2020

Adaptive Control & Signal

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Cylinder pressure signal provides key feedback information that allows for several engine monitoring and control capabilities. During the last few years, the use of cylinder pressure traces for advanced combustion strategies has become the focus of several research works. This is primarily due to the availability of reliable and inexpensive cylinder pressure sensors with expected durability that meets the vehicle lifetime. In this context, several approaches have been proposed to determine the engine trapped mass from the cylinder pressure measurements. A recent innovative approach for trapped charge determination based on a two-dimensional graphical signature is proposed in a previous work. The resulting estimator uses cylinder pressure signal as a unique input and allows to deduce the trapped mass on a cycle by cycle basis in steady and transient operating conditions. It has been validated in a wide range of engine operating conditions using instrumentation and industrial cylinder pressure sensors. This paper provides a theoretical framework and in-depth analysis for the signature based trapped mass estimator. A state-space model for in-cylinder conditions during the compression phase that complies with the signature modeling structure is developed. Extensive numerical investigations using an experimentally validated simulation platform are then performed. The objective is to select the optimal signature generation interval that reduces the impact of cycle to cycle fluctuations in terms of intake valve closing temperature and polytropic index. The obtained results are promising and clearly show the performance and robustness of the signature based trapped mass estimator that can provide relevant feedback information for adaptive engine control systems. It can be easily implemented for real-time monitoring and control in industrial automotive applications.

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Estimation of Engine Parameters from Measured Cylinder Pressure

Maurya

2019

Mechanical Engineering Series

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Estimation of the Engine Thermal State by in-Cylinder Pressure Measurement in Automotive Diesel Engines

Cited by 14 publications

References 9 publications

Validation of In-cylinder Heat Flux Estimation Model by Measuring Wall Temperature

Validation of In-cylinder Heat Flux Estimation Model by Measuring Wall Temperature

Trapped mass estimation in automotive diesel engines based on in‐cylinder pressure signal projection

Estimation of Engine Parameters from Measured Cylinder Pressure

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