Knock in spark-ignition engines : End-gas temperature measurements using rotational CARS and detailed kinetic calculations of the autoignition process
(1997) International Spring Fuels and Lubricants Meeting- 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.
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- author
- Bood, Joakim LU ; Bengtsson, Per Erik LU ; Mauss, Fabian LU ; Burgdorf, Klaas and Denbratt, Ingemar
- organization
- publishing date
- 1997
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- host publication
- SAE Technical Papers
- conference name
- International Spring Fuels and Lubricants Meeting
- conference location
- Dearborn, MI, United States
- conference dates
- 1997-05-05 - 1997-05-08
- external identifiers
-
- scopus:85072454782
- 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
- 2022-04-16 18:14:49
@inproceedings{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.</p>}}, author = {{Bood, Joakim and Bengtsson, Per Erik and Mauss, Fabian and Burgdorf, Klaas and Denbratt, Ingemar}}, booktitle = {{SAE Technical Papers}}, language = {{eng}}, 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}}, doi = {{10.4271/971669}}, year = {{1997}}, }