Effect of exhaust gas recirculation on diesel knock intensity and its mechanism
Journal Article
·
· Combust. Flame; (United States)
This paper presents an experimental study of the effect of exhaust gas recirculation (EGR) on diesel knock intensity, which is defined and discussed. In a previous paper, it was reported that particulate emission can be decreased by applying EGR under certain operating conditions; and the possible mechanism of the effect of EGR was presented. In the present study, the effect of EGR on diesel knock is examined under a variety of operating conditions. Diesel knock intensity is decreased considerably by EGR under the same operating conditions as when the particulate emission is decreased. A quantitative relationship between the diesel knock intensity and the maximum rate of cylinder pressure rise is obtained. The effect of EGR on diesel knock intensity is determined by both the chemical reaction rate of the initial premixed combustion (spontaneous ignition) and the fuel mass fraction prepared and burned in this stage. This is verified by measuring the ignition lag and classifying it into chemical and physical lags by a statistical technique.
- Research Organization:
- Dept. of Mechanical Engineering, Faculty of Engineering, Gunma Univ., Tenjin-cho, Kiryu, Gunma 376 (JP)
- OSTI ID:
- 6911711
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 72:3; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
AMPLITUDES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
CONTROL
DIESEL ENGINES
DIESEL FUELS
EMISSION
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
IGNITION QUALITY
INTERNAL COMBUSTION ENGINES
KINETICS
KNOCK CONTROL
PETROLEUM PRODUCTS
POLLUTION CONTROL EQUIPMENT
REACTION KINETICS
WASTES
330102* -- Internal Combustion Engines-- Diesel
AMPLITUDES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
CONTROL
DIESEL ENGINES
DIESEL FUELS
EMISSION
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
IGNITION QUALITY
INTERNAL COMBUSTION ENGINES
KINETICS
KNOCK CONTROL
PETROLEUM PRODUCTS
POLLUTION CONTROL EQUIPMENT
REACTION KINETICS
WASTES