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Knock in spark-ignition engines : End-gas temperature measurements using rotational CARS and detailed kinetic calculations of the autoignition process

Bood, Joakim LU ; Bengtsson, Per Erik LU ; Mauss, Fabian LU ; Burgdorf, Klaas and Denbratt, Ingemar (1997) International Spring Fuels and Lubricants Meeting In SAE Technical Papers
Abstract

Cycle-resolved end-gas temperatures were measured using dual-broadband rotational CARS in a single-cylinder spark-ignition engine. Simultaneous cylinder pressure measurements were used as an indicator for knock and as input data to numerical calculations. The chemical processes in the end-gas have been analysed with a detailed kinetic mechanism for mixtures of iso-octane and n-heptane at different Research Octane Numbers (RON'S). The end-gas is modelled as a homogeneous reactor that is compressed or expanded by the piston movement and the flame propagation in the cylinder. The calculated temperatures are in agreement with the temperatures evaluated from CARS measurements. It is found that calculations with different RON'S of the fuel... (More)

Cycle-resolved end-gas temperatures were measured using dual-broadband rotational CARS in a single-cylinder spark-ignition engine. Simultaneous cylinder pressure measurements were used as an indicator for knock and as input data to numerical calculations. The chemical processes in the end-gas have been analysed with a detailed kinetic mechanism for mixtures of iso-octane and n-heptane at different Research Octane Numbers (RON'S). The end-gas is modelled as a homogeneous reactor that is compressed or expanded by the piston movement and the flame propagation in the cylinder. The calculated temperatures are in agreement with the temperatures evaluated from CARS measurements. It is found that calculations with different RON'S of the fuel lead to different levels of radical concentrations in the end-gas. The apperance of the first stage of the autoignition process is marginally influenced by the RON, while the ignition delay of the second stage is increased with increasing RON. © 1997 Society of Automotive Engineers, Inc.

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Chapter in Book/Report/Conference proceeding
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published
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SAE Technical Papers
conference name
International Spring Fuels and Lubricants Meeting
external identifiers
  • Scopus:84877510750
DOI
10.4271/971669
language
English
LU publication?
yes
id
e1d890e6-bcd0-40bb-bd77-82f947163c9b
date added to LUP
2016-06-29 17:34:53
date last changed
2016-10-23 04:44:22
@misc{e1d890e6-bcd0-40bb-bd77-82f947163c9b,
  abstract     = {<p>Cycle-resolved end-gas temperatures were measured using dual-broadband rotational CARS in a single-cylinder spark-ignition engine. Simultaneous cylinder pressure measurements were used as an indicator for knock and as input data to numerical calculations. The chemical processes in the end-gas have been analysed with a detailed kinetic mechanism for mixtures of iso-octane and n-heptane at different Research Octane Numbers (RON'S). The end-gas is modelled as a homogeneous reactor that is compressed or expanded by the piston movement and the flame propagation in the cylinder. The calculated temperatures are in agreement with the temperatures evaluated from CARS measurements. It is found that calculations with different RON'S of the fuel lead to different levels of radical concentrations in the end-gas. The apperance of the first stage of the autoignition process is marginally influenced by the RON, while the ignition delay of the second stage is increased with increasing RON. © 1997 Society of Automotive Engineers, Inc.</p>},
  author       = {Bood, Joakim and Bengtsson, Per Erik and Mauss, Fabian and Burgdorf, Klaas and Denbratt, Ingemar},
  language     = {eng},
  series       = {SAE Technical Papers},
  title        = {Knock in spark-ignition engines : End-gas temperature measurements using rotational CARS and detailed kinetic calculations of the autoignition process},
  url          = {http://dx.doi.org/10.4271/971669},
  year         = {1997},
}