Design and development of a probe-based multiplexed multi-species absorption spectroscopy sensor for characterizing transient gas-parameter distributions in the intake systems of I.C. engines

Jatana, Gurneesh S.; Geckler, Sam; Koeberlein, David; Partridge, William P.

doi:10.1016/j.snb.2016.08.183

Cited by 8 publications

(16 citation statements)

References 19 publications

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“…As shown in Figure 1, the EGR system was instrumented at three locations (the EGR cooler outlet, compressor outlet, and the intake manifold) to simultaneously characterize temporal variations in the EGR stream using high-speed gas concentration measurements performed with a diode-laser-absorption sensor. 16 This sensor has the capability to perform gas temperature, pressure, and H 2 O and CO 2 concentration measurements simultaneously at four different locations with 5 kHz measurement bandwidth. This sensor and its prior iterations have previously been used to perform high-speed measurements at various locations on internal combustion engines such as intake manifold, 17 turbocharger inlet, 18 and intake ports.…”

Section: Methodsmentioning

confidence: 99%

“…Prior publications have described the high-speed EGR probe system in detail, 16 and therefore, only a brief overview of the system is given here. All the subcomponents of the EGR probe system are illustrated in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

“…Both subsystems use distributed-feedback diode lasers, with wavelengths of 1.39 µm for H 2 O spectroscopy and 2.7 µm for CO 2 spectroscopy, for the absorption measurements. Engine measurements were performed using compact probes 16 (9.525 mm (3/8″) outer diameter stainless steel tube) that were installed on the engine using ¼ National Pipe Thread (NPT) Swagelok fittings. Using four of these probes, this high-speed EGR probe system can perform gas property measurements at four different locations simultaneously.…”

Section: Methodsmentioning

confidence: 99%

“…At the gas conditions expected in the intake gas stream, the sensor has previously been shown to have around 10% uncertainty in the absolute values of the measured gas properties. 16…”

Section: Methodsmentioning

confidence: 99%

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Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability

Jatana

Kaul

2018

International Journal of Engine Research

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Dilute combustion offers efficiency gains in boosted gasoline direct injection engines both through knock-limit extension and thermodynamic advantages (i.e. the effect of γ on cycle efficiency), but is limited by cyclic variability at high dilution levels. Past studies have shown that the cycle-to-cycle dynamics are a combination of deterministic and stochastic effects. The deterministic causes of cyclic variations, which arise from feedback due to exhaust gas recirculation, imply the possibility of using active control strategies for dilution limit extension. While internal exhaust gas recirculation will largely provide a next-cycle effect (short-timescale feedback), the feedback of external exhaust gas recirculation will have an effect after a delay of several cycles (long timescale). Therefore, control strategies aiming to improve engine stability at dilution limit may have to account for both short- and long-timescale feedback pathways. This study shows the results of a study examining the extent to which variations in exhaust gas recirculation composition are preserved along the exhaust gas recirculation flow path and thus the relative importance and information content of the long-timescale feedback pathway. To characterize the filtering or retention of cycle-resolved feedback information, high-speed (1–5 kHz) CO2 concentration measurements were performed simultaneously at three different locations along the low-pressure external exhaust gas recirculation loop of a four-cylinder General Motors gasoline direct injection engine using a multiplexed two-color diode laser absorption spectroscopy sensor system during steady-state and transient engine operation at various exhaust gas recirculation levels. It was determined that cycle-resolved feedback propagates through internal residual gases but is filtered out by the low-pressure exhaust gas recirculation flow system and do not reach the intake manifold. Intermediate variations driven by flow rate and compositional changes are also distinguished and identified.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…At the gas conditions expected in the intake gas stream, the sensor has previously been shown to have around 10% uncertainty in the absolute values of the measured gas properties. 16…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability

Jatana

Kaul

2018

International Journal of Engine Research

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“…Nowadays, DAS is still widely used in many fields because of its irreplaceable advantages of easy implementation, free of calibration and high temporal resolution (49,(67)(68)(69)(70). When a well collimated laser at central frequency v [cm ¡1 ] enters a gas sample with a total path length of L [cm], a proportion of light is absorbed and the wavelength-dependent transmission coefficient t v is described as…”

Section: Direct Absorption Spectroscopy (Das)mentioning

confidence: 99%

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

Liu

2018

Applied Spectroscopy Reviews

173

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Laser absorption spectroscopy (LAS) has been rapidly developed and widely applied to combustion diagnosis in recent decades. As a costeffective tool for measuring multiple combustion parameters, LAS provides unique properties in terms of accuracy and sensitivity for understanding the reactions and kinetics in reactive flows. Line-ofsight and tomographic LAS techniques have stimulated numerous applications and been proved to be robust for in situ combustion diagnosis in uniform and non-uniform combustion fields, respectively. This review highlights the breakthroughs in the evolution of LAS techniques from the viewpoints of key principles, sensors and instrumentations developed for combustion diagnosis, with particular emphasis on a series of spatially-resolved LAS techniques with their recent applications on obtaining high-fidelity measurement results with minimal intrusion to the practical combustors. Along the way, we note some challenges and requirements for further development of the LAS-based combustion diagnosis.

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Hydrocarbon and particulate matter evolution in the exhaust manifold of a spark-ignited engine under cold-start operation

Jatana,

Chuahy,

Park

et al. 2023

Applications in Energy and Combustion Science

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Design and development of a probe-based multiplexed multi-species absorption spectroscopy sensor for characterizing transient gas-parameter distributions in the intake systems of I.C. engines

Cited by 8 publications

References 19 publications

Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability

Characterization of temporal variations and feedback timescales of exhaust gas recirculation gas properties using high-speed diode laser absorption spectroscopy for next-cycle control of cyclic variability

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

Hydrocarbon and particulate matter evolution in the exhaust manifold of a spark-ignited engine under cold-start operation

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