Modifications in CFR Engine in Order to Measure Overall Burning Time

Dalavia, Diocles; Santos, Dinarte; Buboli, Henrique Campos; Bortolini, Marcio; Bassani, Irionson Antonio

doi:10.4271/2010-36-0119

Cited by 1 publication

(3 citation statements)

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“…The data acquisition system is comprised by a modified CFR engine as described by Dalavia [1], an electronic timer, and a digital storage oscilloscope. The Figure 1 shows the data acquisition system.…”

Section: Methodsmentioning

confidence: 99%

“…Burning velocities depend on temperature, pressure and mixture composition, and can be evaluated by open pipe or constant volume vessel techniques. Dalavia [1] introduced a method of measuring burning time directly in a CFR SI engine. This work presents the burning times of several hydrocarbons, as measured by Dalavia's method, and compares them to burning velocity data published by Farrell [2].…”

Section: Introductionmentioning

confidence: 99%

“…Dalavia [1] proposed a method of assessing burning velocities in an Otto cycle CFR engine, measuring the time elapsed from the mixture ignition to the flame front arrival at the opposite cylinder wall, as detected by an ionization sensor. This method has the merit of evaluating the burning velocities in the engine itself, avoiding the need of correction factors for temperature, pressure, and turbulence…”

Section: Introductionmentioning

confidence: 99%

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Hydrocarbon burning velocities determination using modified CFR engine

Santos

Nunes

Miranda

2016

Anais Do XXIV Simpósio Internacional De Engenharia Automotiva

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Hydrocarbon burning velocities have been investigated for a long time, as they affect internal combustion engine performance. Burning velocities depend on temperature, pressure and mixture composition, and can be evaluated by open pipe or constant volume vessel techniques. Farrell [2] published experimental data on combustion velocities for pure compounds measured in a constant volume vessel under typical conditions of temperature and pressure found at the end of an Otto engine compression stroke. Dalavia [1] proposed a method of assessing overall burning time in an Otto cycle CFR engine, measuring the time elapsed from the mixture ignition to the flame front arrival at the opposite cylinder wall, as detected by an ionization sensor. Our work compared flame travel times measured in a modified CFR engine to burning velocity data published by Farrell [2] for pure hydrocarbons, checking the correlation between them. The mean combustion speeds of ten pure hydrocarbons were evaluated at stoichiometric conditions, keeping the compression ratio constant as the ignition advance was changed. The results were validated and the modified CFR engine was found to be an effective tool to determine burning velocities.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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