A comprehensive model for the auto-ignition prediction in SI engines fuelled with mixtures of gasoline and methane based fuel

[+] Author and Article Information
Emiliano Pipitone

University of Palermo

Stefano Beccari

University of Palermo

1Corresponding author.

ASME doi:10.1115/1.4041675 History: Received June 07, 2018; Revised October 01, 2018


The introduction of natural gas (NG) in the road transport market is proceeding through bi-fuel vehicles, which, endowed of a double injection system, can run either with gasoline or with NG. A third possibility is the simultaneous combustion of NG and gasoline, called Double-Fuel (DF) combustion: the addition of methane to gasoline allows to run the engine with stoichiometric air even at full load, without knocking phenomena, increasing engine efficiency of about 26% and cutting pollutant emissions by 90%. The introduction of DF combustion into series production vehicles requires however proper engine calibration (i.e. determination of DF injection and spark timing maps), a process which is drastically shortened by the use of computer simulations (with a 0D two zone approach for in-cylinder processes). An original knock onset prediction model is here proposed to be employed in zero-dimensional simulations for knock-safe performances optimization of engines fueled by gasoline-NG mixtures or gasoline-methane mixtures. The model takes into account the NTC behavior of fuels and has been calibrated using a considerable amount of knocking in-cylinder pressure cycles acquired on a Cooperative Fuel Research engine widely varying compression ratio, inlet temperature, spark advance and fuel mixture composition, thus giving the model a general validity for the simulation of naturally aspirated or supercharged engines. As a result, the auto-ignition onset is predicted with maximum and mean error of 4.5 and 1.4 deg respectively, which is a negligible quantity from an engine control standpoint.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In