paper-plane envelope home office pencil quill pen image images camera play bullhorn connection mic file-text2 file-picture file-music file-play file-video copy folder folder-open folder-plus folder-minus folder-download folder-upload price-tag price-tags ticket phone envelop pushpin location compass map map2 clock alarm fax mobile bubble bubbles user users user-plus user-minus user-check quotes-left quotes-right search pie-chart stats-dots stats-bars airplane cloud-download cloud-upload earth link flag eye eye-blocked arrow-up-left arrow-up arrow-up-right arrow-right arrow-down-right arrow-down arrow-down-left arrow-left2 share amazon google-plus google-drive facebook instagram twitter rss youtube flickr dropbox linkedin file-pdf file-openoffice file-word file-excel

UCL Mechanical Engineering
Faculty of Engineering Sciences


Joined UCL: October 2016

Ahmad Almaleki

  • PhD Researcher
  • UCL Mechanical Engineering

Contact Ahmad Almaleki

Research Area

ICEs Combustion and Fuels

Research Outline

A Study of Knock Rating and In-Cylinder Mixture of IC Engines Future Fuels


Future fuels will be produced from a wide range of sources, both fossil and renewable alternatives, and will be required to satisfy sustainability criteria and also exhibit combustion characteristics compatible with existing IC engines.

In the case of spark ignition engines, there is, therefore, a need to develop a detailed scientific understanding of the effects of fuel and additive on the occurrence of knock, which can limit engine thermal efficiency and potentially increase emissions of regulated pollutants such as nitrogen oxides (NOx) and soot. In-cylinder sampling of gases from within the combustion chamber, with speciation of compounds present at different stages of fuel injection and combustion, can provide insight for example as to how the breakdown of fuels of varying composition can lead to knock, or how additives may interact with fuel reactions to suppress knock.

My research interests are focused on the experimental measurements of octane ratings of potential IC engine future fuels to investigate the effects of those fuels and additives on the occurrence of knock and engine performance parameters.

Back to top