Analysis of pre-ignition to super-knock: Hotspot-induced deflagration to detonation

Zhi Wang, Yunliang Qi, Xin He, Jianxin Wang, Shijing Shuai, Chung King Law

Research output: Contribution to journalArticlepeer-review

202 Scopus citations


Occurrence of sporadic super-knock is the main obstacle in the development of advanced gasoline engines. By utilizing a rapid compression machine, events of pre-ignition and super-knock in a closed system under high temperature and high pressure were captured by synchronous high-speed direct photography and pressure measurement, with the results demonstrating that the mechanism of super-knock is constituted by hotspot-induced deflagration to detonation followed by high-pressure oscillation (DDP).

Original languageEnglish (US)
Pages (from-to)222-227
Number of pages6
StatePublished - Mar 15 2015

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry


  • Combustion
  • Deflagration
  • Detonation
  • Pre-ignition
  • Super-knock


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