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

Abstract

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

Investigation on combustion parameters of palm biodiesel operating with a diesel engine

“…It is observed in Figure 5(a) and 5(b) that COVs for Pmax are relatively small (<%) for both test fuels and COV for frequency distributions of 5% MFB, 10% MFB, 50% MFB and 90% MFB are also small for conventional diesel and palm biodiesel. These results are parallel with previous studies on engine cycle-to-cycle variation related to biodiesel fuel properties [35,36]. A drawback of the conventional diesel engine is when the COV IMEP exceeds 10%, drivability problems in vehicles could arise.…”

Characterization of cycle-to-cycle variations in a natural gas spark ignition engine

“…The parameters k wos1 and k wos2 are multipliers that have to be adjusted. More details of the thermodynamic model can be found in Reyes et al [24].…”

“…The general objective of the optimization procedure is to reduce the error of the fitness function, both for motored (mass fraction burned zero) and combustion (mass fraction burned unity) conditions. Detailed information of the crossover function and the Z function can be found in Reyes et al [24] where a full description of the genetic algorithm is presented with supplementary information.…”

“…This complete model is run over six series of 830 consecutive engine pressure data. More details about the model can be found in the work of Reyes et al [24]. Genetic algorithms were firstly introduced by Holland [25].…”

Characterization of the combustion process and cycle-to-cycle variations in a spark ignition engine fuelled with natural gas/hydrogen mixtures

“…They found that hydrogen addition contributes to reducing the duration of flame development, which has highly positive effects on reducing cycle-by-cycle variations. Reyes et al [23] characterized mixtures of natural gas and hydrogen in a single-cylinder spark ignition engine by means of a zero dimensional thermodynamic model.…”