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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2014

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Theoretical analysis of air-fuel mixture formation in the combustion chambers of the gas engine with two-stage combustion system

Jamrozik A., Tutak W.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2014

Vol. 62, nr 4

779--790

The results of theoretical analysis of a mixture formation process during the compression stroke in a prechamber of the IC (internal combustion) gas engine with the stratified mixtures two-stage combustion system were presented in the paper. The course of excess air-fuel ratio changes in prechamber at ignition time λkz in function of degree of the mixture condensation during the compression stroke φ expressing quotient of a temporary cylinder and prechamber volume and maximal value of the volume were estimated. Research concerning λkz sensitivity on changes of rich combustible mixture composition delivered to the prechamber by the additional fuel supply system λko, mixture composition in cylinder _c and degree of filling a prechamber with the rich combustible mixture ξ were performed. According to numerical calculations it was proved that the real gas engine with the two stage combustion system at equal degree requires exact regulation of the three analysed values.