Investigating Diesel Engine Combustion by Means of a Timed Sampling Valve

Whitehouse, N. D.; Clough, E.; Roberts, Phil

doi:10.4271/770409

Cited by 13 publications

(3 citation statements)

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“…Various works [32][33][34][35][36] shows the importance of modelling work and its validation by experimental work concerning combustion systems. Many works performed measurements of species at both the exhaust pipe and during the combustion [37][38][39][40]. Mishra et al [41] measured concentrations of selected hydrocarbons (CH 4 , C 2 H 6 , C 2 H 4 and C 2 H 2 ) have been measured in CH 4 /air partially premixed flames for different primary mixture equivalence ratio and primary jet velocity using gas chromatography.…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of concentration profiles in an HCCI engine, modelled by a multi-component kinetic mechanism: Outline for auto-ignition and emission control

Machrafi

2010

Energy Conversion and Management

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In order to contribute to the auto-ignition and emission control for Homogeneous Charge Compression Ignition (HCCI), a kinetic multi-component mechanism, containing 62 reactions and 49 species for mixtures of n-heptane, iso-octane and toluene is validated in this work, comparing for the concentration profiles of the fuel, the total hydrocarbons, O 2 , CO 2 , CO, acetaldehyde and iso-butene. These species are sampled during the combustion and quantified. For these measurements an automotive exhaust analyser, a gas chromatograph, coupled to a mass spectrometer and a flame ionisation detector are used, depending on the species to be measured. The fuel, total hydrocarbons, O 2 , CO 2 , iso-butene and acetaldehyde showed a satisfactory quantitative agreement between the mechanism and the experiments.Both the experiments and the modelling results showed the same formation behaviour of the different species. An example is shown of how such a validated mechanism can provide for a set of information of the behaviour of the auto-ignition process and the emission control as a function of engine parameters.2

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Section: Introductionmentioning

confidence: 99%

Experimental validation of concentration profiles in an HCCI engine, modelled by a multi-component kinetic mechanism: Outline for auto-ignition and emission control

Machrafi

2010

Energy Conversion and Management

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“…The devices, electromagnetic principle in particular, facilitates the adaptation and the handling in contrast to hydraulic systems [1,2,3,4,5,6]. The valve head is distinguished by a very small diameter of 6 mm and a length of 14 mm.…”

Section: Gsvmentioning

confidence: 99%

“…Since the FID is calibrated with propane (C 3 H 8 ), it is necessary to convert the indicated value to that of a real fuel (in this case: C 7,1 H 12,8 -established from a fuel analysis) with the help of the carbon ratio. Taking into account the required air (14,5 kg air / kg fuel ) for this special fuel, an equivalent indication value of approx. 46.400 ppm can be established for a stoichiometric mixture.…”

Section: Hydrocarbon Analysis To Determine the Air-fuel Mixture Ratiomentioning

confidence: 99%

Analysis of Mixture Conditions Close to Spark Plug Location using a Time Resolved Gas Sampling Valve

Kölmel

Spicher

Düsterwald³

et al. 1998

SAE Technical Paper Series

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The quality of air-/fuel-mixture is of prime importance for cycle fluctuations of combustion. Investigations of mixture formation and conditions in SI engines have been subject of intensive research since many years. The scope of this work was to investigate crank angle resolved determination of qualitative and quantitative mixture conditions inside the combustion chamber in dependence on various engine operating conditions. For this experimental investigation a time resolved Gas Sampling Valve (GSV) was combined with a flame ionisation detector (FID), a CO 2-analyzer and a mass spectrometer. The GSV also enables the determination of residual gas concentration. Measurements on a DI gasoline engine show influences of air-/fuel-mixture in dependence on various engine operating conditions when the engine runs in charge stratification mode. Moreover, experimental results of local mixture composition are compared with fuel distribution, calculated from CFD-codes.

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