A study on pegging methods for noisy cylinder pressure signal

Lee, Kang Yoon; Yoon, Maru; Sunwoo, Myoungho

doi:10.1016/j.conengprac.2007.10.007

Cited by 52 publications

(31 citation statements)

References 7 publications

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“…One of the disadvantages of the utilization of these kinds of transducers for pressure measurement is that they can only measure pressure variations, thus an absolute pressure can not be obtained directly. This means that a pressure offset correction (also called pressure pegging) is needed in order to obtain an absolute value, being this being one of the main problems for this measuring technique [20,21].…”

Section: Introductionmentioning

confidence: 99%

Study of the cycle-to-cycle variations of an internal combustion engine fuelled with natural gas/hydrogen blends from the diagnosis of combustion pressure

Reyes¹,

Melgar²,

Pérez³

et al. 2013

International Journal of Hydrogen Energy

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Spark ignition engine Combustion diagnosisAlternative fuels Genetic algorithm a b s t r a c tA methodology is presented for studying the influence of using alternative fuels on the cycle-to-cycle variations of a spark ignition engine which has been fuelled with mixtures of natural gas and hydrogen in different proportions (0e100%). The experimental facility consists of a single-cylindrical spark ignition engine coupled to an asynchronous machine IntroductionBecause of the increasing concern about energy deficiency and environmental defence, much effort has been focused on the use of alternative fuels in internal combustion engines (ICE). Alternative fuels are clean, when compared to conventional ones derived from petroleum in ICE. Natural gas (NG) is considered to be a probable alternative fuel due to its properties and higher octane number. NG is a mixture of different gases where methane is its main constituent (75e98% of methane; 0.5e13% of ethane; and 0e2.6% of propane [1] Available online at www.sciencedirect.com journal h om epa ge: www.elsev ier.com/locate/he i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 8 ( 2 0 1 3 ) 1 5 4 7 7 e1 5 4 8 7

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Section: Introductionmentioning

confidence: 99%

Study of the cycle-to-cycle variations of an internal combustion engine fuelled with natural gas/hydrogen blends from the diagnosis of combustion pressure

Reyes¹,

Melgar²,

Pérez³

et al. 2013

International Journal of Hydrogen Energy

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show abstract

“…For our study, the cylinder pressure data were pegged by assuming that the in-cylinder pressure at 10 °CA after the intake BDC (±2°) was equal to the mean intake manifold absolute pressure. This method appears to be the best suited for low speeds and an untuned intake system, as is our case [24].…”

Section: Methodsmentioning

confidence: 99%

“…This is what is usually known as pegging. Reference [24] presents the pegging methods with their influence on the indicated calculated parameters. For our study, the cylinder pressure data were pegged by assuming that the in-cylinder pressure at 10 °CA after the intake BDC (±2°) was equal to the mean intake manifold absolute pressure.…”

Section: Methodsmentioning

confidence: 99%

Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine

Clenci

Bîzîiac²,

Podevin

et al. 2013

Energies

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Abstract:Reducing fuel consumption is a prime objective in the automotive industry in order to meet regulatory and customer demands. Variable valve actuation offers many opportunities for improving the spark ignition engine's performance in areas such as fuel economy and pollutant emissions. Our studies revealed that the ability to control maximum intake valve lift does indeed offer the ability to control intake air mass, but also has the added benefit that it improves the fuel-air mixing process thanks to an increased turbulence, caused by the increased intake flow velocity. This is particularly important at idle and low part loads when low maximum lifts are to be used for improving the fuel economy or for achieving the required power. The paper focuses on the experimental results obtained when approaching idle operation with different intake valve laws. Results indicating the potential of using low intake valve lift for fuel economy and cyclic dispersion improvement are presented in this paper.

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“…Therefore, it is required to provide known pressure value to a data point in the cycle (called ''pegging'' or referencing). Existing methods of estimating the cylinder pressure pegging can be divided in two group; methods which requires additional absolute pressure reference and the method which utilize the polytropic compression curve [14,15]. In this study, pressure pegging point is BDC of piston in intake stroke, which is considered to be equal to intake manifold pressure.…”

Section: In-cylinder Pressure Measurement and Peggingmentioning

confidence: 99%