Fuels and combustion

Bengt Johansson*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

6 Scopus citations


This chapter discusses the combustion processes and the link to the fuel properties that are suitable for them. It describes the basic three concepts, including spark ignition (SI) and compression ignition (CI), and homogeneous charge compression ignition (HCCI). The fuel used in a CI engine is vastly different from that in an SI engine. In an SI engine, the fuel should sustain high pressure and temperature without autoignition. Apart from the dominating SI and CI engines, it is also possible to operate with a type of combustion: autoignition. With HCCI, the fuel and air are fully premixed before combustion as in the SI engine, but combustion is started by the increased pressure and temperature during the compression stroke. Apart from the three combustion processes, there are also a few combined or intermediate concepts, such as Spark-Assisted Compression Ignition (SACI). Those concepts are discussed in terms of the requirements of fuel properties.

Original languageEnglish (US)
Title of host publicationBiofuels from Lignocellulosic Biomass
Subtitle of host publicationInnovations beyond Bioethanol
Number of pages27
ISBN (Electronic)9783527685318
ISBN (Print)9783527338139
StatePublished - Aug 17 2015

Bibliographical note

Publisher Copyright:
© 2016 Wiley-VCH Verlag GmbH & Co. KGaA. All rights reserved.


  • Compression ignition
  • Dual fuel
  • Fuel properties
  • Homogeneous charge compression ignition
  • Partially premixed combustion
  • Pilot-assisted compression ignition
  • Prechamber flame ignition
  • Reactivity controlled compression ignition
  • Spark-assisted compression ignition

ASJC Scopus subject areas

  • General Engineering


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